CN1946237A - Method and device for determining small cell transmission mode in multicast broadcast system - Google Patents

Abstract

Translated fromChinese

本发明涉及无线通信领域，公开了一种多播广播系统中小区传输模式确定方法及其设备，使得PTP模式小区和PTM模式小区的交界区域尽量减少。本发明中，综合考虑待定小区及其相邻区域中用户使用多播广播业务的情况，确定待定小区的传输模式。可以先根据小区中多播广播业务的用户数初步确定小区的传输模式，如果PTP模式小区的相邻小区中PTM模式小区的比例超过门限，则将该PTP模式小区改置为PTM模式。也可以根据网络规划数据中小区相邻的信息，预先定义多个由相邻小区组成的小区组，为每个小区组设定统一的传输模式。小区组的传输模式可以根据组内各小区初步确定的传输模式相对比例决定，也可以根据小区组内用户总数决定。

The invention relates to the field of wireless communication, and discloses a method and equipment for determining a cell transmission mode in a multicast broadcasting system, so that the boundary area between a PTP mode cell and a PTM mode cell can be reduced as much as possible. In the present invention, the transmission mode of the undetermined cell is determined by comprehensively considering the situation that users in the undetermined cell and its adjacent areas use the multicast broadcast service. The transmission mode of the cell can be preliminarily determined according to the number of users of the multicast broadcast service in the cell. If the ratio of the PTM mode cell in the adjacent cells of the PTP mode cell exceeds the threshold, the PTP mode cell is changed to the PTM mode. It is also possible to pre-define a plurality of cell groups composed of adjacent cells according to the adjacent cell information in the network planning data, and set a unified transmission mode for each cell group. The transmission mode of the cell group can be determined according to the relative proportion of the transmission mode initially determined by each cell in the group, or can be determined according to the total number of users in the cell group.

Description

Translated fromChinese

多播广播系统中小区传输模式确定方法及其设备Method and device for determining cell transmission mode in multicast broadcasting system

技术领域technical field

本发明涉及无线通信领域，特别涉及多播广播技术。The invention relates to the field of wireless communication, in particular to multicast broadcast technology.

背景技术Background technique

经过近几十年迅猛发展，移动通信惠及的人群越来越广，但是其所提供的业务仍然以电话和消息为主。随着因特网(Internet)的迅猛发展，大量移动多媒体业务涌现出来，其中一些移动多媒体业务要求多个用户设备(UserEquipment，简称“UE”)能同时接收相同数据，例如视频点播、电视广播、视频会议、网上教育、互动游戏等，目前在有线网络上可以采用网间互联协议(Internet Protocol，简称“IP”)组播和广播技术来实现。但是由于移动通信网络所具有的特定的网络结构、功能实体和无线接口等均与有线通信IP网络不同，并且这些移动多媒体业务与一般的数据业务相比，具有数据量大、持续时间长、时延敏感等特点，现有IP组播和广播技术并不能直接适用于移动网。After decades of rapid development, mobile communication has benefited more and more people, but the services it provides are still mainly telephone and messaging. With the rapid development of the Internet (Internet), a large number of mobile multimedia services have emerged, some of which require multiple User Equipment ("UE") to receive the same data at the same time, such as video on demand, television broadcasting, video conferencing , online education, interactive games, etc., can be implemented on the wired network using Internet Protocol (Internet Protocol, referred to as "IP") multicast and broadcast technology. However, because the specific network structure, functional entity and wireless interface of the mobile communication network are different from the wired communication IP network, and compared with the general data service, these mobile multimedia services have large data volume, long duration, time-consuming Delay sensitivity and other characteristics, the existing IP multicast and broadcast technology can not be directly applied to the mobile network.

为了有效地利用移动网资源，实现移动多媒体业务的应用，第三代合作伙伴项目(3rd Generation Partnership Project，简称“3GPP”)提出了多媒体广播组播业务(Multimedia Broadcast/Multicast Service，简称“MBMS”)。其目的是在移动通信网络中提供一个数据源向多个用户发送数据的点到多点业务，实现网络资源共享，提高网络资源的利用率，尤其是空口接口资源。3GPP提出的MBMS业务不仅能实现纯文本低速率的消息类组播和广播，而且还能实现高速多媒体业务的组播和广播，这无疑顺应了移动数据发展的趋势。In order to effectively utilize mobile network resources and realize the application of mobile multimedia services, the 3rd Generation Partnership Project (3GPP for short) proposed the Multimedia Broadcast/Multicast Service (MBMS for short) ). Its purpose is to provide a point-to-multipoint service in which one data source sends data to multiple users in the mobile communication network, realize network resource sharing, and improve the utilization rate of network resources, especially air interface resources. The MBMS service proposed by 3GPP can not only realize plain text low-rate message multicast and broadcast, but also realize multicast and broadcast of high-speed multimedia services, which undoubtedly conforms to the development trend of mobile data.

MBMS体系结构如图1所示，其中，广播组播业务中心(BroadcastMulticast Service Center，简称“BM-SC”)是为了支持MBMS业务而新增的移动网功能实体，它是内容提供商的入口，用于授权和在移动网中发起MBMS承载业务，以及按照预定时间计划传送MBMS内容。此外，为了支持MBMS业务，在UE、通用移动通信系统地面无线接入网(UMTS TerrestrialRadio Access Network，简称“UTRAN”)、全球移动通信系统及其演进的增强数据无线接入网络(GSM EDGE Radio Access Network，简称“GERAN”)、通用分组无线业务服务支持节点(Serving GPRS Support Node，简称“SGSN”)、通用分组无线业务网关支持节点(GPRS Gateway Support Node，简称“GGSN”)等功能实体上分别增加了MBMS相关的功能。The MBMS architecture is shown in Figure 1, where the Broadcast Multicast Service Center (BM-SC) is a mobile network functional entity newly added to support MBMS services, and it is the entrance of content providers. It is used to authorize and initiate the MBMS bearer service in the mobile network, and transmit MBMS content according to the predetermined time plan. In addition, in order to support MBMS services, in UE, Universal Mobile Telecommunications System Terrestrial Radio Access Network (UMTS Terrestrial Radio Access Network, referred to as "UTRAN"), Global System for Mobile Communications and its Evolved Enhanced Data Radio Access Network (GSM EDGE Radio Access Network) Network, referred to as "GERAN"), General Packet Radio Service Support Node (Serving GPRS Support Node, referred to as "SGSN"), General Packet Radio Service Gateway Support Node (GPRS Gateway Support Node, referred to as "GGSN") and other functional entities respectively Added MBMS-related functions.

MBMS业务包括组播模式和广播模式，其中组播模式需要用户签约相应的组播组，进行业务激活，并产生相应的计费信息。The MBMS service includes multicast mode and broadcast mode, among which the multicast mode requires users to subscribe to a corresponding multicast group, perform service activation, and generate corresponding charging information.

在广播模式业务和组播模式业务的数据传送阶段，MBMS业务在UTRAN和UE间传输信息的方式有两种模式：点到多点(Point to Multipoint，简称“PTM”)模式和点到点(Point to Point，简称“PTP”)模式。In the data transmission stage of broadcast mode service and multicast mode service, there are two modes for MBMS service to transmit information between UTRAN and UE: Point to Multipoint (Point to Multipoint, referred to as "PTM") mode and point to point ( Point to Point, referred to as "PTP") mode.

所谓PTP模式是指为小区中每个UE建立一个点到点的承载，如在宽带码分多址(Wideband Code Division Multiple Access，简称“WCDMA”)系统中可以使用专用信道(Dedicate Channel，简称“DCH”)或者高速下行分组接入(High Speed Downlink Packet Access，简称“HSDPA”)方式；所谓PTM模式是指在小区中建立一条公共的传输信道为所有用户提供服务，在WCDMA系统中可以通过辅助公共控制物理信道(Primary Common ControlPhysical Channel，简称“S-CCPCH”)。The so-called PTP mode refers to establishing a point-to-point bearer for each UE in the cell. For example, in a Wideband Code Division Multiple Access (WCDMA) system, a Dedicate Channel (Dedicate Channel, "WCDMA") system can be used. DCH") or High Speed Downlink Packet Access (High Speed Downlink Packet Access, referred to as "HSDPA") mode; the so-called PTM mode refers to the establishment of a public transmission channel in the cell to provide services for all users, in the WCDMA system can be assisted Common Control Physical Channel (Primary Common ControlPhysical Channel, referred to as "S-CCPCH").

无线通讯网络中的资源主要有软资源(功率)、硬资源(码、传输、信道单元)等多种。对于PTP模式而言，每个PTP模式的用户连接都会占用一份硬资源，其功率的占用因为有着功率控制机制而随着用户距离基站的远近和是否有障碍物遮挡而有所不同；对于PTM模式而言，所有用户共享一条公共传输信道，因此只占用一份硬资源，但是由于必须保证小区内所有用户均能获得服务，所以必须消耗更多的功率以保证小区边缘的用户也能够接收数据。The resources in the wireless communication network mainly include soft resources (power), hard resources (code, transmission, channel unit) and so on. For PTP mode, each user connection in PTP mode will occupy a hard resource, and its power consumption will vary with the distance between the user and the base station and whether there are obstacles because of the power control mechanism; for PTM In terms of mode, all users share a common transmission channel, so only one share of hard resources is occupied, but since it is necessary to ensure that all users in the cell can obtain services, more power must be consumed to ensure that users at the edge of the cell can also receive data .

由于在一个小区内，随着时间段的不同，接收MBMS业务的用户数目也不同。为了尽可能降低发送功率，并节省空中接口无线资源，MBMS业务在不同的情况下，使用不同的业务承载模式。由于在PTP模式下，可以使用功率控制，因此在用户数较少时使用这一承载模式，可以节省基站的发送功率，降低基站的功耗。但是在用户数增多的情况下，使用PTP模式承载业务，要耗费许多的硬资源，并且使得基站发送功率较大，因而通常在用户数较多时使用PTM模式承载业务，以节省空中接口无线资源。Because in a cell, the number of users receiving MBMS services varies with time periods. In order to reduce transmission power as much as possible and save air interface radio resources, MBMS services use different service bearer modes in different situations. Since power control can be used in the PTP mode, using this bearer mode when the number of users is small can save the transmission power of the base station and reduce the power consumption of the base station. However, when the number of users increases, using the PTP mode to carry services consumes a lot of hard resources and increases the transmission power of the base station. Therefore, when the number of users is large, the PTM mode is usually used to carry services to save air interface radio resources.

当一个MBMS业务开始数据传输时，无线网络控制器(Radio NetworkController，简称“RNC”)首先通过统计(counting)功能统计小区中对此业务感兴趣的用户，如果用户数超过某个门限(称之为Ncounting)，则使用PTM模式；如果没有，则使用PTP模式。When an MBMS service starts data transmission, the radio network controller (Radio Network Controller, referred to as "RNC") first counts the users interested in this service in the cell through the counting function. If the number of users exceeds a certain threshold (called is Ncounting), use PTM mode; if not, use PTP mode.

对于已经采用PTM模式发送的小区，RNC周期性发起counting过程，重新统计用户数并决定是否继续采用PTM模式，如果发现用户数少于Ncounting，则转为使用PTP模式。For cells that have already adopted the PTM mode for transmission, the RNC periodically initiates the counting process, recounts the number of users and decides whether to continue to use the PTM mode, and if the number of users is found to be less than Ncounting, then switch to use the PTP mode.

对于已经采用PTP模式发送的小区，RNC也需要统计MBMS用户连接的个数，一旦发现用户连接的个数超过某个门限(称之为Nptp-ptm)，则转为使用PTM模式；否则继续使用PTP模式。For the cells that have been sent in PTP mode, RNC also needs to count the number of MBMS user connections. Once it finds that the number of user connections exceeds a certain threshold (called Nptp-ptm), it will switch to use PTM mode; otherwise continue to use PTP mode.

在实际应用中，现有技术存在以下问题：在PTP模式小区和PTM模式小区的交界地带，存在PTM模式小区资源消耗大和PTM模式UE接收质量差两大弊端。In practical application, the prior art has the following problems: at the border area between PTP mode cells and PTM mode cells, there are two disadvantages of high resource consumption of PTM mode cells and poor reception quality of PTM mode UEs.

造成这种情况的主要原因在于，由于每个小区都可以独立选择传输模式，因此不可避免的会出现大量PTP模式小区和PTM模式小区相邻的情况。The main reason for this situation is that since each cell can independently select a transmission mode, it is inevitable that a large number of PTP mode cells and PTM mode cells are adjacent to each other.

如图2所示，UE1处于软切换状态，在PTP模式小区和PTM模式小区均有无线链路，但是其最优小区依然是PTP模式小区，因为其距离PTM模式小区并不很远，因此PTM模式小区必须为其建立PTP模式的软切换链路，否则的话根据CDMA系统的同频覆盖特性，UE1将会对PTM模式小区造成极大的上行干扰。可见，PTP模式小区和PTM模式小区交界的区域，PTM模式小区将不得不为大量的PTP软切换用户建立软切换无线链路，这将极大的消耗其系统资源，达不到PTM模式小区采用PTM模式以节约网络资源的初衷。As shown in Figure 2, UE1 is in the soft handover state, and has wireless links in both the PTP mode cell and the PTM mode cell, but its optimal cell is still the PTP mode cell, because it is not far away from the PTM mode cell, so the PTM The mode cell must establish a PTP mode soft handover link for it, otherwise, according to the co-frequency coverage characteristics of the CDMA system, UE1 will cause great uplink interference to the PTM mode cell. It can be seen that in the area where the PTP mode cell and the PTM mode cell border, the PTM mode cell will have to establish a soft handover radio link for a large number of PTP soft handover users, which will greatly consume its system resources and fail to reach the PTM mode cell. The original intention of PTM mode is to save network resources.

UE2位于PTM模式小区与PTP模式小区交界处，但是其最优小区依然是PTM模式小区，因此UE2通过PTM模式从小区的公共传输信道接收MBMS业务，但是由于与其相邻的是一个PTP小区，该小区并没有建立公共传输信道，UE2也因此无法从相邻小区获得数据进行合并，从而损失了公共传输信道合并增益，造成小区边缘的UE2接收质量变差。可见，在PTM模式小区和PTP模式小区交界的区域，PTM模式的用户无法从PTP模式小区中获得MBMS数据，损失了公共信道合并增益，导致用户接收质量变差。UE2 is located at the junction of a PTM mode cell and a PTP mode cell, but its optimal cell is still a PTM mode cell, so UE2 receives MBMS services from the common transmission channel of the cell through the PTM mode, but since it is adjacent to a PTP cell, the The cell does not establish a common transmission channel, so UE2 cannot obtain data from adjacent cells for combination, thus losing the common transmission channel combination gain, resulting in poor reception quality of UE2 at the edge of the cell. It can be seen that in the area where the PTM mode cell and the PTP mode cell intersect, the PTM mode user cannot obtain MBMS data from the PTP mode cell, and the common channel combining gain is lost, resulting in poor reception quality of the user.

综合以上两点，在PTP模式小区和PTM模式小区的交界地带，存在PTM模式小区资源消耗大和PTM模式UE接收质量差两大弊端。且PTP模式小区和PTM模式小区的交界区域越多，情况越严重。To sum up the above two points, there are two major disadvantages in the border area between the PTP mode cell and the PTM mode cell, which consume large resources in the PTM mode cell and poor reception quality of the PTM mode UE. Moreover, the more border areas between PTP mode cells and PTM mode cells, the more serious the situation.

发明内容Contents of the invention

本发明各实施方式要解决的主要技术问题是提供一种多播广播系统中小区传输模式确定方法及其设备。The main technical problem to be solved by each embodiment of the present invention is to provide a method and equipment for determining a transmission mode of a cell in a multicast broadcast system.

为解决上述技术问题，本发明提供了一种多播广播系统中小区传输模式确定方法，包含以下步骤：In order to solve the above technical problems, the present invention provides a method for determining a cell transmission mode in a multicast broadcasting system, comprising the following steps:

为待定小区确定一参考区域，该参考区域至少包含该待定小区和该待定小区的至少一个相邻小区；Determining a reference area for the pending cell, where the reference area includes at least the pending cell and at least one neighboring cell of the pending cell;

根据该参考区域中用户使用多播广播业务的情况确定该待定小区传输该多播广播业务的传输模式。Determine the transmission mode for the undetermined cell to transmit the multicast broadcast service according to the situation that the users in the reference area use the multicast broadcast service.

本发明还提供了一种多播广播系统中小区传输模式确定设备，包含：The present invention also provides a cell transmission mode determination device in a multicast broadcast system, comprising:

为待定小区确定一个参考区域的单元，该参考区域至少包含该待定小区和该待定小区的至少一个相邻小区；determining a unit of a reference area for the undetermined cell, the reference area at least including the undetermined cell and at least one neighboring cell of the undetermined cell;

根据该参考区域中用户使用多播广播业务的情况确定该待定小区传输该多播广播业务的传输模式的单元。A unit for determining the transmission mode of the pending cell for transmitting the multicast broadcast service according to the situation of users using the multicast broadcast service in the reference area.

通过比较可以发现，本发明的技术方案与现有技术的主要区别在于，本发明综合考虑待定小区及其相邻区域中用户使用多播广播业务的情况，确定待定小区的传输模式。相对于仅根据待定小区中多播广播业务的用户数确定传输模式的现有技术，本发明减少了PTP模式小区和PTM模式小区交界的情况发生，提高了系统资源利用率和用户接收性能。Through comparison, it can be found that the main difference between the technical solution of the present invention and the prior art is that the present invention determines the transmission mode of the pending cell by comprehensively considering the multicast broadcasting service of users in the pending cell and its adjacent areas. Compared with the prior art in which the transmission mode is determined only according to the number of users of the multicast broadcast service in the undetermined cell, the present invention reduces the intersection of PTP mode cells and PTM mode cells, and improves system resource utilization and user reception performance.

可以先根据小区中多播广播业务的用户数初步确定小区的传输模式，如果PTP模式小区的相邻小区中PTM模式小区的比例超过门限，则将该PTP模式小区改置为PTM模式。The transmission mode of the cell can be preliminarily determined according to the number of users of the multicast broadcast service in the cell. If the ratio of the PTM mode cell in the adjacent cells of the PTP mode cell exceeds the threshold, the PTP mode cell is changed to the PTM mode.

也可以根据网络规划数据中小区相邻的信息，预先定义多个由相邻小区组成的小区组，为每个小区组内各小区设定统一的传输模式。可以先根据小区中多播广播业务的用户数初步确定小区的传输模式，如果小区组中PTM模式的小区数目超过一定门限，则将该小区组中所有小区都设为PTM模式，否则都设为PTP模式。也可以直接根据小区组中多播广播业务的用户总数直接确定该小区组中所有小区的传输模式。因为以小区组为单位统一设置传输模式，所以大大减少了PTP模式小区和PTM模式小区交界的情况发生，减少了系统资源的消耗，改善了用户接收质量。It is also possible to pre-define a plurality of cell groups composed of adjacent cells according to the adjacent cell information in the network planning data, and set a unified transmission mode for each cell in each cell group. The transmission mode of the cell can be preliminarily determined according to the number of users of the multicast broadcast service in the cell. If the number of cells in the PTM mode in the cell group exceeds a certain threshold, all the cells in the cell group are set to the PTM mode, otherwise they are all set to PTP mode. The transmission modes of all the cells in the cell group may also be directly determined according to the total number of users of the multicast broadcast service in the cell group. Because the transmission mode is uniformly set in the unit of the cell group, the occurrence of the intersection between the PTP mode cell and the PTM mode cell is greatly reduced, the consumption of system resources is reduced, and the quality of user reception is improved.

在多播广播业务进行时，将PTM到PTP的模式转换门限设置得比PTP到PTM的模式转换门限小，这样，即使PTP模式的小区或小区组将非最优小区的软切换链路统计成用户数，也不会轻易引发PTP模式到PTM模式的转换，从而减少因不必要的PTM模式而带来的资源浪费。When the multicast broadcast service is in progress, the mode conversion threshold from PTM to PTP is set to be smaller than the mode conversion threshold from PTP to PTM, so that even if the sub-district or sub-district group in PTP mode counts the soft-handover links of non-optimal sub-districts as The number of users will not easily trigger the conversion from PTP mode to PTM mode, thereby reducing the waste of resources caused by unnecessary PTM mode.

附图说明Description of drawings

图1是现有技术中MBMS体系结构图；Fig. 1 is the MBMS architecture diagram in the prior art;

图2是现有技术中PTP模式小区与PTM模式小区相邻的示意图；Fig. 2 is the schematic diagram that PTP mode cell and PTM mode cell are adjacent in the prior art;

图3是根据本发明第一实施方式的多播广播系统中小区传输模式确定方法流程图；3 is a flowchart of a method for determining a cell transmission mode in a multicast broadcast system according to a first embodiment of the present invention;

图4是根据本发明第三实施方式的多播广播系统中小区传输模式确定方法流程图；4 is a flowchart of a method for determining a cell transmission mode in a multicast broadcast system according to a third embodiment of the present invention;

图5是根据本发明第四实施方式的多播广播系统中小区传输模式确定方法流程图；5 is a flowchart of a method for determining a cell transmission mode in a multicast broadcast system according to a fourth embodiment of the present invention;

图6是根据本发明第五实施方式的多播广播系统中小区传输模式确定设备的第一种系统结构图；6 is a first system structural diagram of a device for determining a cell transmission mode in a multicast broadcast system according to a fifth embodiment of the present invention;

图7是根据本发明第五实施方式的多播广播系统中小区传输模式确定设备的第二种系统结构图。Fig. 7 is a second system structure diagram of a device for determining a cell transmission mode in a multicast broadcast system according to a fifth embodiment of the present invention.

具体实施方式Detailed ways

为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明作进一步地详细描述。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

在本发明中，不仅根据待定小区中多播广播业务的用户数，还结合待定小区的相邻区域中用户使用多播广播业务的情况，综合判断确定待定小区的传输模式。从而减少了PTP模式小区和PTM模式小区交界的情况发生，提高了系统资源利用率和用户接收性能。In the present invention, not only according to the number of users of the multicast broadcast service in the undetermined cell, but also combined with the situation of users using the multicast broadcast service in the adjacent area of the undetermined cell, the transmission mode of the undetermined cell is determined through comprehensive judgment. Therefore, the occurrence of the intersection between the PTP mode cell and the PTM mode cell is reduced, and the system resource utilization rate and user receiving performance are improved.

本发明所称的组播广播系统是指所有具有组播广播功能的通信系统，并不是指只有组播广播功能的通信系统。本发明可应用于所有的组播广播系统，只要该系统有PTP和PTM模式即可。虽然在本发明的下面实施方式中，以MBMS进行说明，但本发明并不限于3GPP的MBMS，也可以是微波接入全球互通(Worldwide Interoperability for Microwave Access，简称“WiMAX”)中的组播广播业务等等。The multicast broadcasting system referred to in the present invention refers to all communication systems with multicast broadcasting functions, not to communication systems with only multicast broadcasting functions. The present invention can be applied to all multicast broadcast systems as long as the system has PTP and PTM modes. Although in the following embodiments of the present invention, MBMS is used for illustration, the present invention is not limited to MBMS of 3GPP, and may also be a multicast broadcast in Worldwide Interoperability for Microwave Access (WiMAX) business etc.

下面对本发明第一实施方式进行说明，本发明第一实施方式涉及一种多播广播系统中小区传输模式确定方法，如图3所示。在本实施方式中，预先为每个小区确定一个参考区域，该参考区域包含该小区和该小区所有相邻小区。The first embodiment of the present invention will be described below. The first embodiment of the present invention relates to a method for determining a transmission mode of a cell in a multicast broadcast system, as shown in FIG. 3 . In this embodiment, a reference area is pre-determined for each cell, and the reference area includes the cell and all adjacent cells of the cell.

多播广播业务，如MBMS业务，开始传输时，进入步骤301，RNC对辖下所有小区发起统计过程，统计每个小区需要接收该MBMS业务的用户数，如果所统计的用户数大于等于第一门限则初步确定该小区需要采用PTM模式；否则初步确定该小区需要采用PTP模式。从原则上说，用户数较多时应当使用PTM模式，用户数较少时应当使用PTP模式。然而，用户数的较多和较少是一种定性的判断方式，该判断的具体实现方案是将用户数与各种预定门限(如第一门限、第二门限等)的比较，如果大于门限就表示用户数较多，小于门限就表示用户数较少。这些门限可以根据系统的需要预先设定。Multicast broadcast service, such as MBMS service, when starting to transmit, entersstep 301, RNC initiates a statistical process to all cells under its jurisdiction, counts the number of users who need to receive the MBMS service in each cell, if the number of users counted is greater than or equal to the first The threshold is to preliminarily determine that the cell needs to adopt the PTM mode; otherwise, it is preliminarily determined that the cell needs to adopt the PTP mode. In principle, the PTM mode should be used when the number of users is large, and the PTP mode should be used when the number of users is small. However, the number of users is more or less is a qualitative way of judging. The specific implementation of this judgment is to compare the number of users with various predetermined thresholds (such as the first threshold, the second threshold, etc.), if the number of users is greater than the threshold It means that there are more users, and less than the threshold means that there are fewer users. These thresholds can be preset according to the needs of the system.

接着进入步骤302，为所有小区初步确定传输模式后，RNC逐一检测每个PTP模式小区，如果该PTP模式小区的相邻小区中，初步确定为PTM模式的相邻小区比例超过预置门限，或该PTP模式小区的参考区域中初步确定为PTM模式的小区比例超过预置门限，则将该PTP模式小区最终确定为PTM模式。Then enterstep 302, after initially determining the transmission mode for all cells, the RNC detects each PTP mode cell one by one, if in the adjacent cells of the PTP mode cell, the ratio of the adjacent cells initially determined to be the PTM mode exceeds the preset threshold, or In the reference area of the PTP mode cell, the proportion of cells initially determined to be in the PTM mode exceeds a preset threshold, and the PTP mode cell is finally determined to be in the PTM mode.

因为PTP模式小区改成PMP模式后对其相邻小区会有影响，所以可能需要对PTP模式小区进行多次检测，才能得到最终的结果。Because changing the PTP mode cell to the PMP mode will affect its adjacent cells, it may be necessary to perform multiple detections on the PTP mode cell to obtain the final result.

可以将最终确定为PTP模式的小区归为PTP小区组，将PTM模式的小区归为PTM小区组。The cells that are finally determined to be in the PTP mode can be classified into a PTP cell group, and the cells in the PTM mode can be classified into a PTM cell group.

接着进入步骤303，在MBS业务传输的过程中，对于PTM小区组，RNC需要周期性触发重统计(recounting)过程，在每个PTM模式小区内重新统计正在接收MBMS业务的用户数，如果所统计的用户数大于等于第一门限则再次初步确定该小区当前应该采用PTM模式；否则初步确定该小区当前应该转为PTP模式。Then enterstep 303, in the process of MBS service transmission, for the PTM cell group, RNC needs to periodically trigger the recounting (recounting) process, in each PTM mode sub-district, recount the number of users receiving MBMS service, if the statistics If the number of users is greater than or equal to the first threshold, it is preliminarily determined again that the cell should currently adopt the PTM mode; otherwise, it is preliminarily determined that the cell should currently switch to the PTP mode.

在PTM小区组中所有小区的重统计结束后，逐一检测每个PTP模式的小区，如果该PTP模式小区的相邻小区中，PTM模式的相邻小区比例(包括在本次重统计中初步确定为PTM模式的小区和当前已采用PTP模式的小区)超过预置门限，或该PTP模式小区的参考区域中PTM模式的小区比例超过预置门限，则将该PTP模式小区最终确定为PTM模式。在该检测过程中，可以只对重统计过程中初步确定为PTP模式的小区进行逐一检测确定传输模式，也可以对所有PTP模式的小区进行逐一检测。After the re-statistics of all the cells in the PTM cell group are completed, each PTP mode cell is detected one by one. If the cell in PTM mode and the cell that has currently adopted PTP mode) exceed the preset threshold, or the proportion of cells in PTM mode in the reference area of the PTP mode cell exceeds the preset threshold, then the PTP mode cell is finally determined as the PTM mode. In the detection process, only the cells initially determined to be in the PTP mode in the re-statistics process may be detected one by one to determine the transmission mode, or all cells in the PTP mode may be detected one by one.

对于PTP小区组，需要实时重统计每个PTP模式小区中使用PTP模式接收该MBMS业务的用户数，如果重统计的用户数大于第二门限则初步确定该小区使用PTM模式，否则初步确定该小区使用PTP模式。其中，第二门限大于第一门限。For the PTP cell group, it is necessary to re-count the number of users receiving the MBMS service in PTP mode in each PTP mode cell in real time. If the number of re-counted users is greater than the second threshold, it is initially determined that the cell uses the PTM mode, otherwise the cell is initially determined. Use PTP mode. Wherein, the second threshold is greater than the first threshold.

在重统计完成后，如果存在小区从PTP模式转换为PTM模式，可以直接将该小区最终确定为PTM模式，也可以通过步骤302中方法，检测该小区的相邻小区中PTM模式的相邻小区比例是否超过预置门限，如果是则最终确定该小区使用PTM模式，否则该小区依旧使用PTP模式。一旦该小区最终使用PTM模式，RNC还需逐一检测该小区相邻的其它PTP模式的小区，最终确定这些小区的传输模式。通过多轮检测，得到最终结果。After the re-statistic is completed, if there is a cell converted from the PTP mode to the PTM mode, the cell can be directly determined as the PTM mode, or the method instep 302 can be used to detect the adjacent cells of the PTM mode in the adjacent cells of the cell Whether the ratio exceeds the preset threshold, if so, it is finally determined that the cell uses the PTM mode, otherwise the cell still uses the PTP mode. Once the cell finally uses the PTM mode, the RNC also needs to detect other cells in the PTP mode adjacent to the cell one by one, and finally determine the transmission mode of these cells. Through multiple rounds of testing, the final result is obtained.

在本步骤中，如果小区的传输模式发生变化，则其所属的PTP/PTM小区组也自动更新。In this step, if the transmission mode of the cell changes, the PTP/PTM cell group to which it belongs is also automatically updated.

本发明第二实施方式与第一实施方式大致相同，其区别在于在第一实施方式中，RNC在为所有小区初步确定传输模式后，逐一检测每个PTP模式小区，对其相邻小区中PTM模式小区的比例进行判断，最终确定小区的传输模式；而在本实施方式中，RNC在为所有小区初步确定传输模式后，逐一检测每个PTM模式小区，如果该PTM模式小区的相邻小区中，初步确定为PTP模式的相邻小区比例超过预置门限，或该PTM模式小区的参考区域中初步确定为PTP模式的小区比例超过预置门限，则将该PTM模式小区最终确定为PTP模式。同样可以轮流进行多次检测，以得到最合适的结果，减少PTP模式小区和PTM模式小区交界的情况发生，提高系统资源利用率和用户接收性能。The second embodiment of the present invention is substantially the same as the first embodiment, the difference being that in the first embodiment, after the RNC preliminarily determines the transmission mode for all cells, it detects each PTP mode cell one by one, and the PTM in the adjacent cells In this embodiment, the RNC detects each PTM mode cell one by one after initially determining the transmission mode for all cells, and if the adjacent cells of the PTM mode cell , the proportion of adjacent cells initially determined to be in PTP mode exceeds a preset threshold, or the proportion of cells initially determined to be in PTP mode in the reference area of the PTM mode cell exceeds a preset threshold, then the PTM mode cell is finally determined to be in PTP mode. Similarly, multiple detections can be performed in turn to obtain the most suitable result, reduce the occurrence of the intersection between PTP mode cells and PTM mode cells, and improve system resource utilization and user reception performance.

或者，在本实施方式中，RNC在为所有小区初步确定传输模式后，可以先根据第一实施方式中的方法，逐一检测每个PTP模式小区，根据其相邻小区的情况最终确定小区的传输模式，之后再逐一检测每个PTM模式小区，根据其相邻小区的情况进一步确定小区的传输模式。具体实现时可根据小区的实际分布情况，选择使得PTP模式小区和PTM模式小区交界最少的一种方法。Alternatively, in this embodiment, after the RNC preliminarily determines the transmission mode for all cells, it can first detect each PTP mode cell one by one according to the method in the first embodiment, and finally determine the transmission mode of the cell according to the conditions of its adjacent cells. mode, and then detect each PTM mode cell one by one, and further determine the transmission mode of the cell according to the conditions of its adjacent cells. During specific implementation, a method that minimizes the boundaries between the PTP mode cells and the PTM mode cells may be selected according to the actual distribution of the cells.

下面对本发明第三实施方式进行说明，第三实施方式涉及多播广播系统中小区传输模式的确定方法，如图4所示。在本实施方式中，预先根据网络规划数据将小区划分为小区组，小区组中的每个小区与至少一个其它小区相邻，该小区组即为组中小区的参考区域。The third embodiment of the present invention will be described below. The third embodiment relates to a method for determining a cell transmission mode in a multicast broadcast system, as shown in FIG. 4 . In this embodiment, the cells are divided into cell groups in advance according to the network planning data, and each cell in the cell group is adjacent to at least one other cell, and the cell group is the reference area of the cells in the group.

在MBMS业务开始时，进入步骤401，RNC对辖下所有小区发起统计过程，统计每个小区需要接收该MBMS业务的用户数，如果用户数大于等于第一门限则初步确定该小区需要采用PTM模式；否则初步确定该小区需要采用PTP模式。When the MBMS service starts, enterstep 401, the RNC initiates a statistical process for all the cells under its jurisdiction, and counts the number of users who need to receive the MBMS service in each cell. If the number of users is greater than or equal to the first threshold, it is preliminarily determined that the cell needs to adopt the PTM mode ; Otherwise, it is preliminarily determined that the cell needs to adopt the PTP mode.

接着进入步骤402，逐一检测每个小区组，如果该小区组内初步确定为PTM模式的小区比例超过预置门限，则将该小区组中所有小区最终确定为PTM模式，否则将该小区组中所有小区最终确定为PTP模式。因为以小区组为单位统一设置传输模式，所以大大减少了PTP模式小区和PTM模式小区交界的情况发生，减少了系统资源的消耗，改善了用户接收质量。Then enterstep 402, detect each cell group one by one, if the cell ratio that is initially determined to be the PTM mode in the cell group exceeds the preset threshold, then all the cells in the cell group are finally determined to be the PTM mode, otherwise in the cell group All cells are finally determined to be in PTP mode. Because the transmission mode is uniformly set in the unit of the cell group, the occurrence of the intersection between the PTP mode cell and the PTM mode cell is greatly reduced, the consumption of system resources is reduced, and the quality of user reception is improved.

接着进入步骤403，在MBMS业务的传输过程中，对于当前采用PTM模式的小区组，需要周期性触发重统计过程，重新确定该小区组当前合适的传输模式；对于当前采用PTP模式的小区组，需要实时统计组中小区的用户数，重新确定该小区组是否依旧适合采用PTP模式传输。Then enterstep 403, in the transmission process of the MBMS service, for the cell group currently adopting the PTM mode, the re-statistic process needs to be triggered periodically to re-determine the current suitable transmission mode of the cell group; for the cell group currently adopting the PTP mode, It is necessary to count the number of users in the cells in the group in real time, and re-determine whether the cell group is still suitable for PTP mode transmission.

具体地说，对于采用PTM模式的小区组，需要周期性触发重统计过程，在该小区组的每个小区内重新统计接收MBMS业务的用户数，并采用步骤401中的方法初步确定每个小区的传输模式。在小区组中所有小区的传输模式初步确定后，统计该小区组内使用PTM模式的小区比例，并根据步骤402中的方法最终确认该小区组的传输模式。Specifically, for a cell group using the PTM mode, it is necessary to periodically trigger the re-statistic process, re-count the number of users receiving MBMS services in each cell of the cell group, and use the method instep 401 to initially determine the number of users receiving MBMS services in each cell group. the transmission mode. After the transmission modes of all the cells in the cell group are preliminarily determined, the proportion of cells using the PTM mode in the cell group is counted, and the transmission mode of the cell group is finally confirmed according to the method instep 402 .

对于采用PTP模式的小区组，需要实时统计PTP模式小区组中各小区的用户数，如果发现组中某个小区内正在接收MBMS业务的用户数大于等于第二门限，则初步确认该小区需要采用PTM模式，否则判决该小区需要采用PTP模式。在组内所有小区的重统计结束后，统计当前初步确认需要采用PTM模式传输的小区的比例，同样根据步骤402中的方法最终确认该小区组的传输模式。For a cell group using PTP mode, the number of users in each cell in the PTP mode cell group needs to be counted in real time. If it is found that the number of users receiving MBMS services in a certain cell in the group is greater than or equal to the second threshold, the cell needs to be initially confirmed. PTM mode, otherwise it is determined that the cell needs to adopt PTP mode. After the re-counting of all the cells in the group is completed, the proportion of the cells that need to be transmitted in the PTM mode is initially confirmed, and the transmission mode of the cell group is finally confirmed according to the method instep 402 .

本发明第四实施方式涉及多播广播系统中小区传输模式确定方法，在本实施方式中，同样预先根据网络规划数据将小区划分为小区组，小区组中的每个小区与至少一个其它小区相邻，该小区组即为组中小区的参考区域。The fourth embodiment of the present invention relates to a method for determining the transmission mode of a cell in a multicast broadcast system. In this embodiment, the cells are also divided into cell groups in advance according to the network planning data, and each cell in the cell group is related to at least one other cell. The cell group is the reference area of the cells in the group.

如图5所示，在MBMS业务开始时，进入步骤501，对辖下所有小区发起统计过程，以小区组为单位，统计每个小区组内需要接收该MBMS业务的用户数，如果该用户数大于第三门限，则确定该小区组中所有小区使用PTM模式，否则确定该小区组中所有小区采用PTP模式。因为以小区组为单位统一设置传输模式，所以大大减少了PTP模式小区和PTM模式小区交界的情况发生，减少了系统资源的消耗，改善了用户接收质量。As shown in Figure 5, when the MBMS service starts, enterstep 501, initiate a statistical process for all the cells under its jurisdiction, take the cell group as a unit, and count the number of users who need to receive the MBMS service in each cell group, if the number of users is greater than the third threshold, it is determined that all the cells in the cell group use the PTM mode, otherwise it is determined that all the cells in the cell group use the PTP mode. Because the transmission mode is uniformly set in the unit of the cell group, the occurrence of the intersection between the PTP mode cell and the PTM mode cell is greatly reduced, the consumption of system resources is reduced, and the quality of user reception is improved.

接着进入步骤502，在MBMS业务传输的过程中，对于当前采用PTM模式的小区组，需要周期性触发重统计过程，重新确定该小区组中接收该MBMS业务的用户数；对于当前采用PTP模式的小区组，需要实时统计小区组中接收该MBMS业务的用户数。根据统计的结果，对于当前采用PTM模式的小区组，如果所统计的用户数小于第三门限，则可将该小区组中所有小区的传输模式转换为PTP模式；对于当前采用PTP模式的小区组，如果所统计的用户数大于第四门限，则可将该小区组中所有小区的传输模式转换为PTM模式。其中，第四门限大于第三门限。Then enterstep 502, in the process of MBMS service transmission, for the cell group currently adopting the PTM mode, the re-statistic process needs to be triggered periodically to re-determine the number of users receiving the MBMS service in the cell group; for the cell group currently adopting the PTP mode For a cell group, it is necessary to count the number of users receiving the MBMS service in the cell group in real time. According to the statistical results, for the cell group currently using PTM mode, if the number of users counted is less than the third threshold, the transmission mode of all cells in the cell group can be converted to PTP mode; for the cell group currently using PTP mode , if the counted number of users is greater than the fourth threshold, the transmission mode of all the cells in the cell group may be converted to the PTM mode. Wherein, the fourth threshold is greater than the third threshold.

本发明第五实施方式，涉及一种多播广播系统中小区传输模式确定设备，包含参考区域设置单元，用于为待定小区确定一个参考区域，该参考区域至少包含该待定小区和该待定小区的至少一个相邻小区；传输模式确认单元，根据该参考区域中用户使用多播广播业务的情况确定该待定小区传输该多播广播业务的传输模式。The fifth embodiment of the present invention relates to a device for determining a cell transmission mode in a multicast broadcast system, which includes a reference area setting unit for determining a reference area for an undetermined cell, and the reference area includes at least the undetermined cell and the undetermined cell At least one adjacent cell; a transmission mode confirming unit, which determines the transmission mode of the pending cell for transmitting the multicast broadcast service according to the situation of users using the multicast broadcast service in the reference area.

该参考区域设置单元可以将待定小区和该待定小区的所有相邻小区设置为该待定小区的参考区域；或预先根据网络规划数据划分的小区组，在每个小区组中，每个小区与至少一个其它小区相邻，包含该待定小区的小区组即为该小区的参考区域。The reference area setting unit may set the undetermined cell and all adjacent cells of the undetermined cell as the reference area of the undetermined cell; or pre-divided cell groups according to network planning data, in each cell group, each cell is connected to at least One other cell is adjacent, and the cell group including the pending cell is the reference area of the cell.

传输模式确定单元可以进一步包含：The transmission mode determination unit may further include:

分别根据参考区域内每个小区中多播广播业务的用户数初步确定该小区的传输模式的初步确定模块；根据待定小区和该待定小区所有相邻小区已初步确定的传输模式最终确定该待定小区的传输模式的最终确定模块，如图6所示。由于在确定传输模式时，考虑到相邻小区的传输模式，从而减少了PTP模式小区和PTM模式小区交界的情况发生，提高了系统资源利用率和用户接收性能。A preliminary determination module for initially determining the transmission mode of the cell according to the number of users of the multicast broadcast service in each cell in the reference area; and finally determining the cell to be determined based on the transmission modes of the cell to be determined and all adjacent cells of the cell to be determined. The final determination module of the transmission mode is shown in FIG. 6 . When the transmission mode is determined, the transmission mode of the adjacent cell is taken into consideration, thereby reducing the occurrence of the intersection between the PTP mode cell and the PTM mode cell, and improving the system resource utilization rate and user reception performance.

该初步确定模块还可以分别根据小区组内每个小区中多播广播业务的用户数初步确定该小区的传输模式；该最终确定模块还可以根据初步确定的传输模式确定包含待定小区在内的小区组传输模式，其中，如果该小区组内使用PTM模式的小区比例超过预置门限，则将该小区组中所有小区均确定为PTM模式，否则将该小区组中所有小区均确定为PTP模式。因为以小区组为单位统一设置传输模式，所以大大减少了PTP模式小区和PTM模式小区交界的情况发生，减少了系统资源的消耗，改善了用户接收质量。The preliminary determination module can also preliminarily determine the transmission mode of the cell according to the number of users of the multicast broadcast service in each cell in the cell group; the final determination module can also determine the cells including the undetermined cell according to the preliminarily determined transmission mode Group transmission mode, wherein, if the proportion of cells using the PTM mode in the cell group exceeds a preset threshold, all cells in the cell group are determined to be in the PTM mode, otherwise all cells in the cell group are determined to be in the PTP mode. Because the transmission mode is uniformly set in the unit of the cell group, the occurrence of the intersection between the PTP mode cell and the PTM mode cell is greatly reduced, the consumption of system resources is reduced, and the quality of user reception is improved.

如图7所示，传输模式确定单元还可以包含：第一判决模块，用于在多播广播业务开始传输时，统计小区组内多播广播业务的用户数，如果大于第三门限则确定该小区组使用PTM模式，否则确定该小区组使用PTP模式；第二判决模块，用于对使用PTM模式的小区组，周期性地对多播广播业务的用户数进行重统计，如果重统计的用户数大于第三门限则确定该小区组使用PTM模式，否则确定该小区组使用PTP模式；第三判决模块，用于对使用PTP模式的小区组，实时统计多播广播业务的用户数，如果用户数大于第四门限则确定该小区组使用PTM模式，否则确定该小区组使用PTP模式；其中第四门限大于或等于第三门限。As shown in Figure 7, the transmission mode determination unit may also include: a first decision module, configured to count the number of users of the multicast broadcast service in the cell group when the multicast broadcast service starts to transmit, and determine the number of users of the multicast broadcast service if it is greater than the third threshold The cell group uses the PTM mode, otherwise it is determined that the cell group uses the PTP mode; the second judgment module is used to periodically re-count the number of users of the multicast broadcast service for the cell group using the PTM mode, if the re-counted users If the number is greater than the third threshold, it is determined that the group of cells uses the PTM mode, otherwise it is determined that the group of cells uses the PTP mode; the third judgment module is used to count the number of users of the multicast broadcast service in real time for the group of cells using the PTP mode, if the user If the number is greater than the fourth threshold, it is determined that the cell group uses the PTM mode; otherwise, it is determined that the cell group uses the PTP mode; wherein the fourth threshold is greater than or equal to the third threshold.

虽然通过参照本发明的某些优选实施方式，已经对本发明进行了图示和描述，但本领域的普通技术人员应该明白，可以在形式上和细节上对其作各种改变，而不偏离本发明的精神和范围。Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the present invention. The spirit and scope of the invention.

Claims (11)

1. A method for determining a cell transmission mode in a multicast broadcast system, comprising the steps of:

determining a reference area for a cell to be determined, wherein the reference area at least comprises the cell to be determined and at least one adjacent cell of the cell to be determined;

and determining the transmission mode of the multicast broadcast service transmitted by the cell to be determined according to the condition that the user uses the multicast broadcast service in the reference area.

2. The method of claim 1, wherein the reference region includes the pending cell and all neighboring cells of the pending cell;

determining a transmission mode of the pending cell by:

for each cell in the reference area, preliminarily determining the transmission mode of the cell according to the number of users of the multicast broadcast service in each cell;

and finally determining the transmission mode of the cell to be determined according to the preliminarily determined transmission modes of the cell to be determined and all adjacent cells of the cell to be determined.

3. The method of claim 2, wherein the transmission mode of the cell to be determined is finally determined according to one of the following manners:

if the undetermined cell is preliminarily determined to be in a point-to-point mode, and the ratio of the adjacent cells preliminarily determined to be in a point-to-multipoint mode in each adjacent cell of the undetermined cell exceeds a preset threshold, the undetermined cell is finally determined to be in the point-to-multipoint mode;

if the undetermined cell is preliminarily determined to be in a point-to-multipoint mode, and the ratio of the adjacent cells preliminarily determined to be in a point-to-point mode in each adjacent cell of the undetermined cell exceeds a preset threshold, the undetermined cell is finally determined to be in the point-to-point mode;

if the undetermined cell is preliminarily determined to be in a point-to-point mode, and the proportion of the cell preliminarily determined to be in a point-to-multipoint mode in the reference area exceeds a preset threshold, the undetermined cell is finally determined to be in the point-to-multipoint mode;

and if the undetermined cell is preliminarily determined to be in a point-to-multipoint mode, and the proportion of the cells in the reference area, which are preliminarily determined to be in a point-to-point mode, exceeds a preset threshold, finally determining the undetermined cell to be in the point-to-point mode.

4. The method of claim 1, wherein the reference area is a group of cells divided in advance according to network planning data, and each cell is adjacent to at least one other cell in each group of cells; each cell group uses the same transmission mode.

5. The method of claim 4, wherein the transmission mode of the cell to be determined is determined by:

for each cell in the cell group, preliminarily determining the transmission mode of the cell according to the number of users of the multicast broadcast service in each cell;

if the proportion of the cells using the point-to-multipoint mode in the cell group exceeds a preset threshold, all the cells in the cell group containing the undetermined cell are determined to be the point-to-multipoint mode, otherwise, all the cells in the cell group are determined to be the point-to-point mode.

6. The method of claim 4, wherein the transmission mode of the cell to be determined is determined by:

when the multicast broadcast service starts to be transmitted, counting the number of users of the multicast broadcast service in the cell group, if the number of the users is larger than a third threshold, determining that all cells in the cell group use a point-to-multipoint mode, otherwise, determining that all cells in the cell group use a point-to-point mode;

for a cell group using a point-to-multipoint mode, periodically carrying out statistics on the number of users of the multicast broadcast service, if the number of the users subjected to statistics is larger than a third threshold, determining that the cell group uses the point-to-multipoint mode, otherwise, determining that the cell group uses the point-to-point mode;

counting the number of users of the multicast broadcast service in real time for the cell group using the point-to-point mode, if the number of the users is greater than a fourth threshold, determining that the cell group uses the point-to-multipoint mode, otherwise, determining that the cell group uses the point-to-point mode; wherein the fourth threshold is greater than or equal to the third threshold.

7. The method of claim 2 or 5, wherein the transmission mode of the cell is preliminarily determined according to the number of users by one of the following methods:

counting or re-counting the number of users of the multicast broadcast service in the cell, if the number of users is greater than a preset threshold, preliminarily determining that the cell uses a point-to-multipoint mode, and otherwise, preliminarily determining that the cell uses a point-to-point mode; or,

when the multicast broadcast service starts to be transmitted, counting the number of users of the multicast broadcast service in a cell, if the number of users is larger than a first threshold, preliminarily determining that the cell uses a point-to-multipoint mode, and otherwise, preliminarily determining that the cell uses a point-to-point mode; for a cell using a point-to-multipoint mode, periodically carrying out statistics on the number of users of a multicast broadcast service, if the number of the users subjected to statistics is larger than a first threshold, preliminarily determining that the cell uses the point-to-multipoint mode, and otherwise, preliminarily determining that the cell uses the point-to-point mode; counting the number of users of the multicast broadcast service in real time for a cell using a point-to-point mode, if the number of the users is greater than a second threshold, preliminarily determining that the cell uses the point-to-multipoint mode, otherwise, preliminarily determining that the cell uses the point-to-point mode; wherein the second threshold is greater than or equal to the first threshold.

8. A cell transmission mode determining apparatus in a multicast broadcast system, comprising:

a unit for determining a reference area for a to-be-determined cell, wherein the reference area at least comprises the to-be-determined cell and at least one adjacent cell of the to-be-determined cell;

and determining a unit of the transmission mode of the multicast broadcast service transmitted by the cell to be determined according to the condition that the user uses the multicast broadcast service in the reference area.

9. The device for determining cell transmission mode in a multicast broadcast system according to claim 8, wherein the reference area includes the pending cell and all neighboring cells of the pending cell;

the means for determining the transmission mode of the pending cell further comprises:

a module for preliminarily determining the transmission mode of each cell in the reference area according to the number of users of the multicast broadcast service in each cell;

and finally determining the transmission mode of the cell to be determined according to the preliminarily determined transmission modes of the cell to be determined and all the adjacent cells of the cell to be determined.

10. The device for determining cell transmission mode in a multicast broadcast system according to claim 8, wherein the reference area is a group of cells divided in advance according to network planning data, each cell being adjacent to at least one other cell in each group of cells; each cell group uses the same transmission mode;

the means for determining the transmission mode of the pending cell further comprises:

a module for preliminarily determining the transmission mode of each cell in the reference area according to the number of users of the multicast broadcast service in each cell;

and determining the transmission mode of the cell group including the cell to be determined according to the preliminarily determined transmission mode, wherein if the proportion of the cells using the point-to-multipoint mode in the cell group exceeds a preset threshold, all the cells in the cell group are determined to be the point-to-multipoint mode, and otherwise, all the cells in the cell group are determined to be the point-to-point mode.

11. The device for determining cell transmission mode in a multicast broadcast system according to claim 8, wherein the reference area is a group of cells divided in advance according to network planning data, each cell being adjacent to at least one other cell in each group of cells; each cell group uses the same transmission mode;

the means for determining the transmission mode of the pending cell further comprises:

a first decision module, configured to count the number of users of the multicast and broadcast service in a cell group when the multicast and broadcast service starts to be transmitted, determine that the cell group uses a point-to-multipoint mode if the number of users is greater than a third threshold, and otherwise determine that the cell group uses a point-to-point mode;

a second decision module, configured to periodically perform statistics again on the number of users of the multicast broadcast service in a cell group using a point-to-multipoint mode, determine that the cell group uses the point-to-multipoint mode if the number of users subjected to statistics again is greater than a third threshold, and otherwise determine that the cell group uses the point-to-point mode;

a third decision module, configured to count the number of users of the multicast broadcast service in real time for a cell group using a point-to-point mode, determine that the cell group uses a point-to-multipoint mode if the number of users is greater than a fourth threshold, and otherwise determine that the cell group uses the point-to-point mode; wherein the fourth threshold is greater than or equal to the third threshold.

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