CN1780458A - Time-Frequency Based Wireless Channel Resource Allocation Method - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及移动通信系统中的无线信道资源的分配以及传输技术，特别涉及在时分双工(简称TDD)蜂窝移动通信系统中小区信道划分的方法。The invention relates to allocation and transmission technology of wireless channel resources in a mobile communication system, in particular to a method for channel division of a cell in a time division duplex (abbreviated as TDD) cellular mobile communication system.
背景技术Background technique
蜂窝移动通信系统需要将无线信道分配给各个基站和移动台，使其能够完成上行和下行业务传输。基于时分双工(TDD)移动通信系统能够根据业务的需求灵活地分配上行和下行信道，实现对称和非对称业务的有效传输。The cellular mobile communication system needs to allocate wireless channels to each base station and mobile station so that they can complete uplink and downlink service transmission. The mobile communication system based on Time Division Duplex (TDD) can flexibly allocate uplink and downlink channels according to service requirements, and realize effective transmission of symmetric and asymmetric services.
信道分配的目标是最大限度的利用无线信道资源，在尽可能小的干扰条件下高速传输数据信号。为了控制移动通信系统资源，采用集中资源管理能够有效的利用无线资源和网络资源。考虑到小区间的干扰，各小区所占用的资源应该有所区别，并能够通过一定的标识方式将其有效地分离。特别是在正交频分复用(简称OFDM)系统中需要对频率，时隙和码资源进行合理的配置，以便获取得较大的资源利用率。The goal of channel allocation is to maximize the use of wireless channel resources and transmit data signals at high speed with as little interference as possible. In order to control the resources of the mobile communication system, the use of centralized resource management can effectively utilize wireless resources and network resources. Considering the interference between cells, the resources occupied by each cell should be different, and can be effectively separated by a certain identification method. Especially in an Orthogonal Frequency Division Multiplexing (abbreviated as OFDM) system, frequency, time slot and code resources need to be reasonably allocated in order to obtain a greater resource utilization.
信道的分配方法一般有固定信道分配，动态信道分配和混合信道分配。Channel allocation methods generally include fixed channel allocation, dynamic channel allocation and mixed channel allocation.
固定信道分配(简称FCA)是根据各小区传播特性和业务量分布特征，将信道资源固定地分配给各基站。但是，它所带来的问题是不利于系统业务和环境的变化。Fixed channel allocation (FCA for short) is to allocate channel resources fixedly to each base station according to the propagation characteristics and traffic distribution characteristics of each cell. However, the problem it brings is not conducive to system business and environmental changes.
动态信道分配方案(简称DCA)是将所有的信道都放在一个资源池中。当某一小区用户需要一个信道传输信号时，无线资源控制器会根据资源使用情况执行或拒绝给该小区用户分配一个信道。尽管DCA能够提供相当高的资源利用效率和灵活的业务适配性，但由于其算法在高负载时计算复杂度过高，使DCA在实际系统中难于应用。A dynamic channel allocation scheme (DCA for short) is to place all channels in a resource pool. When a user in a certain cell needs a channel to transmit signals, the radio resource controller executes or refuses to allocate a channel to the user in the cell according to resource usage conditions. Although DCA can provide quite high resource utilization efficiency and flexible business adaptability, it is difficult to apply DCA in practical systems due to the high computational complexity of its algorithm under high load.
为了克服FCA和DCA的缺陷，混合信道分配(简称HCA)将信道分成部分固定部分和动态两部分。它结合了FCA和DCA的特点，能够在有限的计算复杂度下实现一定信道资源的动态分配。In order to overcome the defects of FCA and DCA, hybrid channel allocation (referred to as HCA) divides the channel into two parts: fixed part and dynamic part. It combines the characteristics of FCA and DCA, and can realize the dynamic allocation of certain channel resources with limited computational complexity.
为了进一步说明混合信道分配方法，图1描述了移动通信系统资源配置结构。通过码域，频域和时域的不同划分可以实现对无线系统资源进行分配。信道码用于区分不同的小区，它可以在各小区投入使用前被确定。在信息传输过程中，频域资源和时域资源—频带和时隙可以灵活分配给各小区用户。在图1中10表示时域资源，它是按帧来划分时域空间，一帧时间由多个时隙组成。20表示频率域，可以将其一段频带分成多个子频带。30表示码域，可对各小区配置不同的专用码序列。如40小区#1配置C1码，42小区#2配置C2码，48小区#最大(max)配置Cmax码等。In order to further illustrate the mixed channel allocation method, Fig. 1 describes the resource allocation structure of the mobile communication system. The allocation of wireless system resources can be realized through different divisions of code domain, frequency domain and time domain. The channel code is used to distinguish different cells, and it can be determined before each cell is put into use. In the process of information transmission, frequency domain resources and time domain resources—frequency bands and time slots—can be flexibly allocated to users in each cell. In FIG. 1 , 10 represents a time-domain resource, which divides the time-domain space by frame, and one frame time is composed of multiple time slots. 20 represents the frequency domain, and a frequency band may be divided into multiple sub-frequency bands. 30 represents a code field, and different dedicated code sequences can be configured for each cell. For example, the 40th cell #1 is configured with a C1 code, the 42th cell #2 is configured with a C2 code, and the 48th cell #max (max) is configured with a Cmax code, etc.
在现有的资源管理的处理方法中，往往只考虑单个小区资源调度，很少考虑多小区不同的资源需求，或者将上行和下行资源分开设计。对TDD系统多小区信道分配的灵活性以及减小相互干扰等问题缺乏统筹考虑。TDD的系统资源可调整的特性没有充分的体现。在现有的信道分配方案，都存在上述问题。如使用FCA算法时，由于各小区业务量不同，会造成一些小区信道资源不够用，而另一些小区信道资源却处于空闲状态。使用DCA方法时，计算量偏大，网络管理复杂。尤其是在各小区业务量大的情况下实现更加困难。虽然HCA方法能够融合解决各方面的问题，但是这种方法一般通过向相邻小区借用信道满足本小区业务量；或划出很小公共部分作为公共区域各小区根据其业务量申请占用。这会造成业务量调整范围不大，资源控制也不灵活等问题。In existing resource management processing methods, only single cell resource scheduling is often considered, and different resource requirements of multiple cells are rarely considered, or uplink and downlink resources are designed separately. There is a lack of overall consideration for issues such as the flexibility of multi-cell channel allocation in the TDD system and the reduction of mutual interference. The adjustable characteristics of system resources of TDD are not fully reflected. The above problems exist in the existing channel allocation schemes. For example, when using the FCA algorithm, due to the different traffic of each cell, the channel resources of some cells may not be sufficient, while the channel resources of other cells are in an idle state. When using the DCA method, the amount of calculation is too large, and the network management is complicated. Especially it is more difficult to realize in the case of heavy traffic in each cell. Although the HCA method can integrate and solve various problems, this method generally meets the traffic volume of the cell by borrowing channels from adjacent cells; or sets aside a small public part as a public area, and each cell applies for occupancy according to its traffic volume. This will result in problems such as limited range of business volume adjustment and inflexible resource control.
发明内容Contents of the invention
本发明的目的是提供一种基于时频无线信道资源分配方法，根据集中控制的混合信道分配原理，给出频率带宽和时隙相结合的信道分配方法。它能够灵活的指派信道，并能够减少小区间的干扰。同时提高了信息传输速率和信道资源的有效利用率。The purpose of the present invention is to provide a time-frequency wireless channel resource allocation method, according to the centralized control mixed channel allocation principle, and provide a channel allocation method combining frequency bandwidth and time slot. It can flexibly assign channels and reduce inter-cell interference. At the same time, the information transmission rate and the effective utilization rate of channel resources are improved.
为实现上述目的，一种基于时频无线信道资源分配方法，包括步骤：In order to achieve the above object, a method for allocating resources based on a time-frequency wireless channel comprises steps:
无线网络控制器集中分配和管理无线信道资源；The wireless network controller centrally allocates and manages wireless channel resources;
采用固定分配和动态分配相结合的混合分配方式，将信道提供给基站和移动台进行通信。A mixed allocation method combining fixed allocation and dynamic allocation is adopted to provide channels to base stations and mobile stations for communication.
本发明适用于TDD移动通信系统信道分配，它能够灵活地配置信道资源。本发明对无线资源采用了集中控制和调度，网络资源管理灵活快速。同时，资源的利用率较高，相应的传输效率也得到提高。本发明通过合理的配置时频块资源，使小区间的干扰和小区内的干扰都比较小。同时，本发明可以容易在系统中实现。The invention is suitable for channel allocation in TDD mobile communication system, and can flexibly configure channel resources. The invention adopts centralized control and scheduling for wireless resources, and the management of network resources is flexible and fast. At the same time, the resource utilization rate is high, and the corresponding transmission efficiency is also improved. In the present invention, the interference between cells and the interference in cells are relatively small by rationally configuring time-frequency block resources. At the same time, the present invention can be easily implemented in the system.
附图说明Description of drawings
图1是移动通信系统资源分配框架；Fig. 1 is a mobile communication system resource allocation framework;
图2是移动系统网络示意图；Fig. 2 is a schematic diagram of a mobile system network;
图3是信道分配过程；Fig. 3 is a channel allocation process;
图4(a)，(b)，(c)是小区资源分配示意图；Figure 4 (a), (b), (c) is a schematic diagram of cell resource allocation;
图5(a)，(b)是第一和第二小区上行业务和下行业务不同配置时信道资源分配实例；Figure 5 (a), (b) is an example of channel resource allocation when the uplink service and downlink service of the first and second cells are configured differently;
图6是无线资源分配表；Fig. 6 is a wireless resource allocation table;
图7是资源分配流程。Figure 7 is a resource allocation process.
具体实施方式Detailed ways
本发明采用了无线网络控制器(RNC)集中控制无线信道资源的方法。它能够高效地利用无线资源。减少信道的浪费和干扰。图2描述了这种采用集中控制的移动通信无线信道分配结构方法。一个80RNC管理和控制多个小区(如2图中90，92，94)，当各小区内移动用户MS(如2图中54，62，72)需要发送数据，它们各自就会向其相应的基站(如2图中50，60，70)发出信道分配请求。各基站将其请求上报80RNC，并将从80RNC分配的信道资源传送给移动台。The present invention adopts a method that a radio network controller (RNC) centrally controls radio channel resources. It can efficiently utilize radio resources. Reduce channel waste and interference. Fig. 2 has described this kind of mobile communication wireless channel assignment structural method that adopts centralized control. An 80RNC manages and controls a plurality of sub-districts (as 90, 92, 94 among the figure 2), when the mobile subscriber MS (such as 54, 62, 72 among the 2 figures) in each sub-district needs to send data, they will respectively send data to their corresponding The base station (such as 50, 60, 70 in Figure 2) sends a channel allocation request. Each base station reports its request to 80RNC, and transmits the channel resource allocated from 80RNC to the mobile station.
本发明给出了一种新的基于时频二维信道资源的分配方法，可以用于单小区和多小区情况：无线资源集中控制，混合分配传输信道。动态调整各小区资源满足对称与非对称业务需求。The invention provides a new allocation method based on time-frequency two-dimensional channel resources, which can be used in the case of single cell and multiple cells: centralized control of wireless resources, mixed allocation of transmission channels. Dynamically adjust the resources of each cell to meet symmetric and asymmetric service requirements.
其工作的过程可以用图3进行说明。The process of its work can be illustrated in Figure 3.
首先120无线网络控制器收集包括110基站在内的所有基站传输业务信息；通过130信息的交互确定小区占用信道资源。120无线网络控制器建立并维护信道资源分配表。该表格存储哪些资源被用于哪些小区上行业务，哪些资源被用于哪些小区下行业务，哪些资源没有被占用等数据。一些频率和时隙的信道资源被固定分配给所有小区；另一些频率和时隙的信道资源被动态地分配给各小区。同时，各小区基站也通过130获得分配给本小区的信道信息。Firstly, the radio network controller at 120 collects the transmission service information of all base stations including the base station at 110 ; through information interaction at 130 , it is determined that the cell occupies channel resources. 120 The radio network controller establishes and maintains a channel resource allocation table. The table stores data such as which resources are used for uplink services of which cells, which resources are used for downlink services of which cells, and which resources are not occupied. Channel resources of some frequencies and time slots are fixedly allocated to all cells; channel resources of other frequencies and time slots are dynamically allocated to each cell. At the same time, each cell base station also obtains channel information allocated to the cell through 130 .
我们将时隙和频段分成可以用于信道传输的时频块(简称TFB)。一个TFB可以包含多个符号间隔和多个子载波带宽。当一个100移动台需要传输业务时，该100移动台会向110基站发出140业务信道请求。110基站根据本小区的信道使用情况向120无线网络控制器发送150信道分配请求，120无线网络控制器查询无线资源信道使用状况，在动态分配区域指派一个时频块作为传输信道。然后，120无线网络控制器向110基站发送160信道确认信息，同时修改信道资源分配表。110基站根据120无线网络控制器确认，170指派某一时频块(TFB)作为100移动台的业务信道。We divide time slots and frequency bands into Time-Frequency Blocks (TFB for short) that can be used for channel transmission. A TFB can contain multiple symbol intervals and multiple subcarrier bandwidths. When a 100 mobile station needs to transmit services, the 100 mobile station sends 140 a traffic channel request to the 110 base station. 110 base station sends 150 a channel allocation request to 120 radio network controller according to the channel usage of the cell, 120 radio network controller queries the radio resource channel usage status, and assigns a time-frequency block in the dynamic allocation area as a transmission channel. Then, 120, the radio network controller sends 160 channel confirmation information to the 110 base station, and at the same time modifies the channel resource allocation table. 110 The base station assigns 170 a certain Time-Frequency Block (TFB) as a traffic channel for 100 mobile stations upon 120 radio network controller acknowledgment.
当多个用户同时进行业务信道请求时，RNC要根据各基站中移动用户的优先级，QoS，业务类型，业务流量等因素进行排序；然后，再按其顺序为它们指派相应的时频块。When multiple users make service channel requests at the same time, RNC should sort them according to the priority, QoS, service type, service flow and other factors of mobile users in each base station; then, assign corresponding time-frequency blocks to them according to their order.
本发明方法每帧的信息分配与格式可以用图4来说明。一帧信道资源包括固定资源分配区域和可变资源分配区域两部分。本发明方法是，将一帧内的前部的数个时频块和后部数个时频块两个部分时隙和频率资源作为固定分配的信道资源。其中前面部分时隙和频率固定用于下行链路信道传输信号，后面部分时隙和频率固定用于上行链路信道传输信号。The information distribution and format of each frame of the method of the present invention can be illustrated with FIG. 4 . A frame of channel resources includes two parts: a fixed resource allocation area and a variable resource allocation area. In the method of the present invention, two partial time slots and frequency resources of several time-frequency blocks at the front and several time-frequency blocks at the rear in one frame are used as channel resources for fixed allocation. The front part of time slots and frequencies are fixedly used for downlink channel transmission signals, and the latter part of time slots and frequencies are fixedly used for uplink channel transmission signals.
这些固定信道一般被用于传播控制信息，如帧头标志，同步信号，下行和上行信道之间的转换点位置指示，广播系统信息，导频信号和控制信息指示等。一帧除了固定资源分配区域外，其它的时隙和频率是属于可变资源分配区域。在这个区域内，每个时频块都可以被动态分配和调整。它们既可以被分配成用于上行链路的信道，也可分配成用于下行的信道。These fixed channels are generally used to disseminate control information, such as frame header signs, synchronization signals, indications of transition points between downlink and uplink channels, broadcast system information, pilot signals, and control information indications. In addition to the fixed resource allocation area in a frame, other time slots and frequencies belong to the variable resource allocation area. In this area, each time-frequency block can be allocated and adjusted dynamically. They can be allocated both as uplink and downlink channels.
在同一时隙里，一些频率可以被分配用于上行信道，另一些频率可以被分配用于下行信道。可变分配区域的信道一般被用于传输业务信息和控制信令(如训练序列，功率控制信息，以及其他控制信息指示等)。下行信道和上行信道的时隙之间需要设置转换点，它可以被设定于可变区域内的任何频点和时隙内变化。如果转换点贯穿于一个或多时隙，这些时隙被称作为转换时隙。在转换时隙的两侧各有一个保护间隔(简称GP)。如果在两个时隙之间有一个转换点，我们只需要一个保护间隔。保护间隔GP的大小受限于小区半径的大小。In the same time slot, some frequencies can be allocated for uplink channels and other frequencies can be allocated for downlink channels. Channels in the variable allocation area are generally used to transmit service information and control signaling (such as training sequences, power control information, and other control information indications, etc.). A switch point needs to be set between the time slots of the downlink channel and the uplink channel, which can be set at any frequency point and time slot within the variable area. If the switching point runs through one or more time slots, these time slots are called switching slots. There is a guard interval (referred to as GP) on both sides of the conversion time slot. We only need a guard interval if there is a transition point between two slots. The size of the guard interval GP is limited by the size of the cell radius.
在动态分配区域的时频块(TFB)通过其所在位置，被分成上行TFB和下行TFB两部分。在可变资源分配范围内，处于转换时隙前面的TFB用于下行链路传输；处于转换时隙后面的TFB用于上行链路传输。在转换时隙内，位于转换点一侧的TFB可用于上行，另一侧就可用于下行。例如，在图4中，位于转换点上面的TFB用于上行信号传输，位于转换点下面的TFB用于下行信号传输；或位于转换点下面的TFB用于上行，位于转换点上面的TFB用于下行。The time-frequency block (TFB) in the dynamic allocation area is divided into two parts, the uplink TFB and the downlink TFB, according to its location. In the variable resource allocation range, the TFBs in front of the switching slot are used for downlink transmission; the TFBs in the back of the switching slot are used for uplink transmission. In the conversion time slot, the TFB located on one side of the conversion point can be used for uplink, and the other side can be used for downlink. For example, in Figure 4, the TFB located above the transition point is used for uplink signal transmission, and the TFB located below the transition point is used for downlink signal transmission; or the TFB located below the transition point is used for uplink, and the TFB located above the transition point is used for down.
对于一个小区而言，下行TFB和上行TFB要安排在不同的时隙。在一个时隙上，一部分TFB如被安排用于传输上行链路信号，其它部分的TFB就不能被安排用于传输下行链路信号。反之，TFB如被安排用于传输上行链路信号，其它部分的TFB不能被安排用于传输下行链路信号。For a cell, the downlink TFB and uplink TFB should be arranged in different time slots. In a time slot, if a part of TFBs is arranged to transmit uplink signals, other part of TFBs cannot be arranged to transmit downlink signals. Conversely, if a TFB is arranged to transmit uplink signals, other parts of the TFB cannot be arranged to transmit downlink signals.
对于不同的小区，在一个时隙上，一部分(或全部)TFB能被用于传输一些小区的上行数据，另一部分(或全部)TFB能被用来传输其它小区的下行数据。For different cells, in one time slot, a part (or all) of TFBs can be used to transmit uplink data of some cells, and another part (or all) of TFBs can be used to transmit downlink data of other cells.
一个TFB块可以被多个小区同时传输信息。但是要求一个TFB在一帧中只能传输一个方向的信号。也就是说，在多小区环境中，对于一个TFB要么传输上行信号，要么传输下行信号。不允许在一个TFB中，一些小区用它传输上行信号的同时，存在其它小区用该TFB传输下行信号。A TFB block can be used by multiple cells to transmit information at the same time. However, it is required that a TFB can only transmit signals in one direction in one frame. That is to say, in a multi-cell environment, a TFB either transmits an uplink signal or a downlink signal. It is not allowed that in a TFB, some cells use it to transmit uplink signals while other cells use this TFB to transmit downlink signals.
在可变资源分配区域，如果前一时隙含有传输下行信号的TFB，当前时隙含有传输上行信号的TFB，那么，为了减少上行信号与下行信号间的相互影响，并满足小区的最大传输距离的要求，在这两个时隙之间就需要一定保护间隔(GP)。GP的大小决定了小区的面积。在GP期间，基站和移动台不发送信号，它们只处于接收信号状态。In the variable resource allocation area, if the previous time slot contains TFBs for transmitting downlink signals and the current time slot contains TFBs for transmitting uplink signals, then in order to reduce the mutual influence between uplink signals and downlink signals and meet the requirements of the maximum transmission distance of the cell Requirements, a certain guard interval (GP) is required between these two time slots. The size of the GP determines the area of the cell. During GP, the base station and the mobile station do not send signals, they are only in the state of receiving signals.
在传输过程中，上行TFB和下行TFB信号之间转换点位置的变化能够决定用于上行链路传输TFB数量和下行链路传输的TFB数量的比例。可以根据不同业务量变化来分配上行信道和下行信道。因此，在不同的帧之间，用于下行信道的TFB数量和用于上行信道的TFB数量的变化可以满足传输对称和非对称业务的不同情况的要求。During transmission, the change in the position of the switch point between the uplink TFB and downlink TFB signals can determine the ratio of the number of TFBs used for uplink transmission to the number of TFBs used for downlink transmission. Uplink channels and downlink channels can be allocated according to different traffic changes. Therefore, between different frames, the change of the number of TFBs used for the downlink channel and the number of TFBs used for the uplink channel can meet the requirements of different situations of transmitting symmetrical and asymmetrical services.
这种混合信道分配算法可以用图4作进一步描述。每一个小区的信道码以及所使用的信道资源情况都记录在无线信道资源配置表中。该表还存储着上行和下行转换点的位置。有三种转换点的小区资源分配形式：图4表示采用所发明的方法分配资源时，转换点占用不同时隙情景；转换点占用多个时隙如图4(a)，转换点占用一个时隙如图4(b)，转换点不占用时隙如图4(c)。This hybrid channel allocation algorithm can be further described with FIG. 4 . The channel code of each cell and the channel resources used are recorded in the wireless channel resource configuration table. The table also stores the locations of the up and down transition points. There are three forms of cell resource allocation for conversion points: Figure 4 shows the scenario where the conversion point occupies different time slots when the invented method is used to allocate resources; the conversion point occupies multiple time slots as shown in Figure 4(a), and the conversion point occupies one time slot As shown in Figure 4(b), the conversion point does not occupy a time slot as shown in Figure 4(c).
设RNC共管理K个小区，各小区的专用标识码可在小区建立时完成配置，如第k小区(1≤k≤K)的信道码为Ck。在每一帧内有T个时隙，F个子频带。其中可变的时隙i的范围为Id≤i≤Iu；频率j范围为fo≤j≤fm。上行和下行TFB的转换点为(isp，jsp)。It is assumed that the RNC manages K cells in total, and the dedicated identification codes of each cell can be configured when the cell is established. For example, the channel code of the kth cell (1≤k≤K) is Ck. There are T time slots and F sub-bands in each frame. The range of variable time slot i is Id ≤ i ≤ Iu ; the range of frequency j is fo ≤ j ≤ fm . The switching point of the uplink and downlink TFBs is (isp , jsp ).
在图4中，470
RNC(或由基站BS申请，RNC确认方式)根据一帧内的资源需求情况，可根据下述方法安排其各小区信道。RNC (or applied by base station BS, RNC confirmation method) can arrange the channels of its various cells according to the following method according to the resource requirements in one frame.
1)确定各小区信道固定分配的位置以及上行时频块和下行时频块范围。1) Determine the location of the fixed channel allocation of each cell and the range of the uplink time-frequency block and the downlink time-frequency block.
2)根据各小区的信道需求，确定上行时频块和下行时频块之间最佳的可变转换点。2) According to the channel requirements of each cell, determine the best variable switching point between the uplink time-frequency block and the downlink time-frequency block.
3)如果多个用户在一帧内都提出业务传输请求，RNC按其优先级，QoS要求，业务类型，业务流量等指标对这些请求进行排序。排在前面的请求先进行处理。如果只有一个用户提出信道请求，则直接进行4)。3) If multiple users put forward service transmission requests in one frame, RNC sorts these requests according to their priority, QoS requirement, service type, service flow and other indicators. Requests queued first are processed first. If only one user makes a channel request, proceed to 4) directly.
4)在信道资源上行和下行资源动态分配范围内，相对可变转换点不同位置的时频块用于传输不同方向的信号。4) Within the range of dynamic allocation of channel resource uplink and downlink resources, time-frequency blocks at different positions relative to the variable switching point are used to transmit signals in different directions.
在一帧的上行和下行可变范围，转换点的左边(前部时隙)和上边(大于转换点的子载波)TFB作为下行链路资源；转换点的右边(后部时隙)和下边(小于转换点的子载波)TFB作为上行链路资源。(注：转换点上下边相反安置TFB资源也可以。)In the variable range of uplink and downlink of a frame, TFB on the left (front time slot) and upper side (subcarriers larger than the conversion point) of the conversion point are used as downlink resources; on the right side (rear time slot) and lower side of the conversion point (Subcarriers smaller than the switching point) TFBs are used as uplink resources. (Note: It is also possible to place the TFB resources oppositely on the upper and lower sides of the conversion point.)
5)对于一个小区，下行时频格和上行时频格应该安排在不同的时隙。如果要在一个时隙上，一部分时频块被安排用于上行数据传输，为减小干扰，另一部分时频格最好不用，即不应被安排用于下行数据传输。反之亦然。5) For a cell, the downlink time-frequency grid and the uplink time-frequency grid should be arranged in different time slots. If in a time slot, a part of the time-frequency blocks are arranged for uplink data transmission, in order to reduce interference, the other part of the time-frequency blocks is preferably not used, that is, it should not be arranged for downlink data transmission. vice versa.
6)对于不同的小区，如果要在一个时隙上，一部分TFB被用于传输一些小区的上行数据，位于转换点的另一侧的TFB可以被安排用于传输其它小区的下行数据。反之亦然。6) For different cells, if in one time slot, some TFBs are used to transmit uplink data of some cells, TFBs located on the other side of the switching point can be arranged to transmit downlink data of other cells. vice versa.
7)分配各小区占用的信道资源。并将分配结果记录在无线资源分配表中。7) Allocate channel resources occupied by each cell. And record the allocation result in the radio resource allocation table.
8)在下一帧信道资源分配时重复2)-7)过程。8) Repeat the process of 2)-7) when channel resource allocation in the next frame.
无线网络控制器内资源管理器中资源配置表可以用图6来描述。它记录了各小区资源使用情况TFB参数表。无线资源配置表包括600表头，660资源占用状况和680表格说明等内容。The resource configuration table in the resource manager in the radio network controller can be described with FIG. 6 . It records the TFB parameter table of the resource usage of each cell. The wireless resource configuration table includes 600 table header, 660 resource occupancy status, 680 table description and the like.
600表头包括系统参数(例如：时频块的分布和数量，上行和下行TFB转换点)。The 600 header includes system parameters (for example: distribution and quantity of time-frequency blocks, uplink and downlink TFB switching points).
660资源使用情况包括信道码分配，占用状况记录着时频块的使用状况，包括使用时频块的小区，传输方向(上行或下行)，固定区域还是可变区域。660 resource usage includes channel code allocation, occupancy status records the usage status of the time-frequency block, including the cell using the time-frequency block, transmission direction (uplink or downlink), fixed area or variable area.
680表格信息包括表格制订和修改时间，维护信息等。
本发明首先由RNC配置各小区的固定信道资源，如各小区的信道码，帧头，广播信息，接入方式等公共资源。然后，依据业务吞吐量和业务类型等参数，计算并统计各小区上行和下行信道需求。在可变信道分配范围初步划分上行时频块和下行时频块资源范围。安排各小区的上行信道和下行信道的时频块。In the present invention, firstly, the RNC configures the fixed channel resources of each cell, such as the channel code, frame header, broadcast information, access mode and other public resources of each cell. Then, according to parameters such as business throughput and business type, calculate and count the uplink and downlink channel requirements of each cell. The uplink time-frequency block and downlink time-frequency block resource ranges are preliminarily divided in the variable channel allocation range. The time-frequency blocks of the uplink channel and downlink channel of each cell are arranged.
在RNC对各小区信道的分配过程中，首先对各小区进行初始化处理，然后根据各小区业务情况安排动态区域内的时频块；以区分哪些资源用于上行链路，哪些资源用于下行链路。当一个基站小区内一个用户发出业务信道请求时，根据下述方法安排其信道。In the process of allocating the channels of each cell by the RNC, it first initializes each cell, and then arranges the time-frequency blocks in the dynamic area according to the business conditions of each cell; to distinguish which resources are used for the uplink and which resources are used for the downlink road. When a user in a base station cell sends a traffic channel request, its channel is arranged according to the following method.
1.RNC为各小区配置基本信道资源：信道码，固定区域信道资源。或得到业务信道变更小区的基本信道资源。1. The RNC configures basic channel resources for each cell: channel codes, fixed regional channel resources. Or obtain the basic channel resources of the cell where the traffic channel is changed.
2.RNC确定可变转换点位置：根据各小区业务量和业务类型，确定其最佳可变转换点。2. The RNC determines the position of the variable switching point: according to the traffic volume and business type of each cell, determine the best variable switching point.
3.RNC或BS下行的信道安排如下：3. The downlink channel arrangement of RNC or BS is as follows:
1)通过可变转换点的位置，来确定TFB的指派。1) The assignment of the TFB is determined by the position of the variable switching point.
a)在转换时隙isp之前的所有时频格都可用作为下行TFB；a) All time-frequency bins before the switching time slot isp can be used as downlink TFB;
b)在转换时隙isp，频点大于jsp的时频格可用作为下行TFB。b) In the switching time slot isp , the time-frequency grid with a frequency point greater than jsp can be used as a downlink TFB.
2)如果处于下行分配区域内时频块为空，该TFB可以被指派为下行TFB；2) If the time-frequency block in the downlink allocation area is empty, the TFB can be assigned as a downlink TFB;
3)如果处于下行动态分配区域内的时频块已经被其它小区下行信道使用，该TFB也可以被指派为多小区共用的下行TFB；3) If the time-frequency block in the downlink dynamic allocation area has been used by downlink channels of other cells, the TFB can also be assigned as a downlink TFB shared by multiple cells;
4)如果上述步骤无法完成下行信道的指派，就需要与上行信道需求配合重新确定可变转换点位置。4) If the above steps cannot complete the assignment of the downlink channel, it is necessary to re-determine the position of the variable conversion point in cooperation with the uplink channel requirement.
5)如果无法变更可变转换点位置，该下行信道请求将在下一帧重新提出信道分配请求。5) If the position of the variable switching point cannot be changed, the downlink channel request will resubmit a channel allocation request in the next frame.
4.RNC或BS上行的信道安排如下：4. RNC or BS uplink channel arrangement is as follows:
1)根据可变转换点的位置，来确定无线信道资源表中时频块的指派；1) According to the position of the variable conversion point, determine the assignment of the time-frequency block in the wireless channel resource table;
a)在isp之后的时隙；TFB可被安排成为用于上行链路的时频块；a) time slot after isp ; TFB can be arranged as a time-frequency block for uplink;
b)处于时隙isp的资源，频点小于的TFB可被指派为用于上行链路的时频块。b) In the resource of time slot isp , the TFB whose frequency point is smaller than that can be assigned as a time-frequency block for uplink.
2)如果一个时频格处于上行分配区域并为空闲，该时频格可以被指派为上行TFB。2) If a time-frequency grid is in the uplink allocation area and is free, the time-frequency grid can be assigned as an uplink TFB.
3)如果一个时频格已经被其它小区上行信道使用，该时频格可以被指派为该小区的共享上行TFB。3) If a time-frequency grid has been used by another cell's uplink channel, the time-frequency grid can be assigned as the shared uplink TFB of the cell.
4)如果上述步骤无法完成下行信道的指派，就需要与下行信道需求配合重新确定可变转换点位置。4) If the above steps cannot complete the assignment of the downlink channel, it is necessary to re-determine the position of the variable switching point in cooperation with the downlink channel requirement.
5)如果无法变更可变转换点位置，该上行信道请求将在下一帧重新提出信道分配请求。5) If the position of the variable conversion point cannot be changed, the uplink channel request will resubmit a channel allocation request in the next frame.
同时，在配置时频格资源时应采取以下措施。At the same time, the following measures should be taken when configuring time-frequency grid resources.
1)在一个小区内，下行时频格和下行时频格要安排在不同的时隙。1) In a cell, the downlink time-frequency grid and the downlink time-frequency grid should be arranged in different time slots.
如果要在一个时隙上，一部分时频块被安排用于上行数据传输，另一部分时频格不能被安排成下行数据传输。反之，如果一部分时频块被安排用于下行数据传输，处于同一个时隙上另一部分时频格不能被安排成上行数据传输。For a time slot, a part of the time-frequency block is arranged for uplink data transmission, and another part of the time-frequency grid cannot be arranged for downlink data transmission. Conversely, if a part of the time-frequency block is arranged for downlink data transmission, another part of the time-frequency grid in the same time slot cannot be arranged for uplink data transmission.
2)对于不同的小区，在一个上行和下行转换时隙上，一部分时频格被用于传输一些小区的上行数据；处于转换时隙另一侧的TFB可以被安排用于传输其它小区的下行数据。2) For different cells, in an uplink and downlink conversion time slot, a part of the time-frequency grid is used to transmit the uplink data of some cells; the TFB on the other side of the conversion time slot can be arranged to transmit the downlink data of other cells data.
3)一个时频格不能同时被用于传输上行数据和下行数据。3) A time-frequency grid cannot be used to transmit uplink data and downlink data at the same time.
实施例Example
参照附图描述本发明的一个实施例。An embodiment of the present invention is described with reference to the drawings.
图5(a)和(b)表示一个由两小区构成的集中控制混合无线资源进行分配的实例。RNC控制2个小区(小区1和小区2)，各小区的特征码由RNC固定分配。一个8×6的时频块资源要根据业务需求基本确定上行信道和下行信道分配。也就是说，在每一帧内有8个时隙，6个子频带。按照上述的混合信道分配方案，固定和可变信道分配范围以及上、下行转换点的位置。固定下行时隙的范围为[1，2]，频率范围为[1，6]；固定上行时隙的范围为第8个时隙，频率j范围为[1，6]。可变的时隙i的范围为[3，7]；频率j范围为[1，6]。上行和下行TFB的可变转换点为(6，3)和(6，4)之间，即TFB63与TFB64之间。图5展示了一帧各小区资源使用状况。Figure 5(a) and (b) show an example of allocation of mixed radio resources under centralized control composed of two cells. The RNC controls two cells (cell 1 and cell 2), and the characteristic codes of each cell are fixedly assigned by the RNC. An 8×6 time-frequency block resource should basically determine the allocation of uplink channels and downlink channels according to business requirements. That is to say, there are 8 time slots and 6 sub-bands in each frame. According to the above-mentioned mixed channel allocation scheme, fixed and variable channel allocation ranges and positions of uplink and downlink switching points. The range of fixed downlink time slots is [1, 2], and the range of frequencies is [1, 6]; the range of fixed uplink time slots is the eighth time slot, and the range of frequency j is [1, 6]. The range of variable time slot i is [3, 7]; the range of frequency j is [1, 6]. The variable switching point of the uplink and downlink TFBs is between (6, 3) and (6, 4), that is, between TFB63 and TFB64. Fig. 5 shows a frame of resource usage status of each cell.
1)对于多个小区而言，前二个时隙和最后一个时隙的所有时频块为550固定信道的范围，并且多个小区均使用这些资源。再根据各小区的信道需求，确定各小区间统一的上行时频块和下行时频块之间最佳的可变转换点。1) For multiple cells, all time-frequency blocks in the first two time slots and the last time slot are in the range of 550 fixed channels, and multiple cells use these resources. Then, according to the channel requirements of each cell, the optimal variable switching point between the unified uplink time-frequency block and downlink time-frequency block among each cell is determined.
2)在560可变信道范围内，各小区有相同的上行时频块和下行时频块的570可变转换点位于TFB63与TFB64之间.在信道资源上、下行可变的范围内，转换点的左边(前部时隙)和上边(较高的频点)作为下行时频块；转换点的右边(后部时隙)和上边(较低的频点)作为上行时频块。安排各小区的占用信道。并分配结果记录在无线资源分配表中2) Within the range of 560 variable channels, each cell has the same uplink time-frequency block and downlink time-frequency block. The 570 variable switching point is located between TFB63 and TFB64. The left side (front time slot) and upper side (higher frequency point) of the point are used as downlink time-frequency blocks; the right side (rear time slot) and upper side (lower frequency point) of the conversion point are used as uplink time-frequency blocks. Arrange the occupied channels of each cell. And the allocation result is recorded in the wireless resource allocation table
3)在540可变信道范围，小区1占用的上行时频块6个：TFB71-TFB76；小区1占用的下行时频块16个：TFB31-TFB36，TFB41-TFB46，TFB51，TFB56，TFB65，TFB66。参见图5(a)第一小区上行信道和下行信道资源分配实例。3) In the range of 540 variable channels, cell 1 occupies 6 uplink time-frequency blocks: TFB71-TFB76; cell 1 occupies 16 downlink time-frequency blocks: TFB31-TFB36, TFB41-TFB46, TFB51, TFB56, TFB65, TFB66 . Refer to Fig. 5(a) for an example of allocation of uplink channel and downlink channel resources in the first cell.
4)在540可变信道范围，对于小区2占用的上行时频块9个：TFB61，TFB62，TFB63，TFB71-TFB76。对于小区2占用的下行时频块17个：TFB31-TFB36，TFB41-TFB46，TFB51-TFB54，TFB56。参见图5(b)第二小区上行信道和下行信道资源分配实例。4) In the range of 540 variable channels, there are 9 uplink time-frequency blocks occupied by cell 2: TFB61, TFB62, TFB63, TFB71-TFB76. There are 17 downlink time-frequency blocks occupied by cell 2: TFB31-TFB36, TFB41-TFB46, TFB51-TFB54, TFB56. Refer to Fig. 5(b) for an example of allocation of uplink channel and downlink channel resources of the second cell.
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