CN101119145B - Open-loop Power Control Method of Auxiliary Frequency Point in Time Division-Synchronous Code Division Multiple Access System - Google Patents

Abstract

The invention discloses an open-loop power control method of auxiliary frequency point in the TD-SCDMA system. The method including the steps as follows: acquiring the receiving signal code power on the PCCPCH of main frequency point; calculating the path loss of down-link channel of main frequency point; acquiring all the interference signal code power of auxiliary and reporting to the wireless network controller RNC, ensuring the expecting receiving signal code power of every auxiliary frequency point; considering the path loss of down-link channel of main frequency point is equal with the path loss of the auxiliary frequency point to ensure the primary launching power of every frequency point in the specialized physical channel with the help of the interference signal code power and the expecting receiving signal code power. The invention can realize the open-loop power control of the auxiliary frequency point in the N frequency points TD-SCDMA system.

Description

Auxiliary frequency point opened loop power control method in the time-division-synchronization code multi-address division system

Technical field

The present invention relates to the open Loop Power control technology in the mobile communication system, the auxiliary frequency point opened loop power control method in particularly a kind of time-division-synchronization code multi-address division system.

Background technology

In Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system, can successful access network in order to guarantee the user, and improve stability of network, and need the control open loop power, promptly need to determine the Initial Trans of up-downgoing physical channel.Because if Initial Trans is too small, then reciprocity physical layer can't receive data effectively, cause the user can't access network; If Initial Trans is excessive, then will cause stronger interference to other user, influence stability of network.

In the TD-SCDMA system, in order to enlarge power system capacity, introduced N frequency technology, a dominant frequency point and a plurality of auxilliary frequency are adopted in each sub-district, and the dominant frequency point can carry public physic channel and DPCH, and auxilliary frequency can only carry DPCH.

Open-loop power control method of the prior art is all at single-frequency point, it is generally acknowledged dominant frequency point open Loop Power control under the N frequency environment can adopt with single-frequency point environment under identical method, this method comprises: measure received signal code power on the dominant frequency point Primary Common Control Physical Channel (PCCPCH) and dominant frequency and put Interference Signal Code Power on each time slot; Calculate the path loss of dominant frequency point down channel, utilize dominant frequency to put the Interference Signal Code Power on each time slot and the default signal interference ratio of corresponding service, calculate the expectation received signal code power of user terminal (UE) or base station (NodeB), and then obtain the Initial Trans on the dominant frequency point physical channel.But control does not still have disclosed method for the auxiliary frequency point opened loop power under the N frequency environment.

Summary of the invention

In view of this, main purpose of the present invention is to provide the auxiliary frequency point opened loop power control method in a kind of TD-SCDMA system, realizes the open Loop Power control on the auxilliary frequency of N frequency TD-SCDMA system.

In order to realize the foregoing invention purpose, the invention provides the auxiliary frequency point opened loop power control method in a kind of TD-SCDMA system, this method comprises: obtain the received signal code power on the dominant frequency point Primary Common Control Physical Channel PCCPCH, calculate the path loss of dominant frequency point down channel, this method is further comprising the steps of:

A, obtain and report the Interference Signal Code Power of all auxilliary frequencies, determine the expectation received signal code power of each auxilliary frequency to radio network controller (RNC);

B, the path loss that dominant frequency is put down channel are approximately the path loss of auxilliary frequency, and Interference Signal Code Power that integrating step A obtains and expectation received signal code power are determined the Initial Trans on each auxilliary frequency DPCH.

The described received signal code power that obtains on the dominant frequency point PCCPCH is: UE measures and obtains the received signal code power on the dominant frequency point PCCPCH;

The path loss of described definite dominant frequency point down channel is: according to received signal code power on the dominant frequency point PCCPCH and transmitted power, determine the path loss of dominant frequency point down channel.

The described Interference Signal Code Power that obtains all auxilliary frequencies of steps A is: obtain the Interference Signal Code Power on all each time slots of auxilliary frequency;

The expectation received signal code power of described definite each auxilliary frequency is: the expectation received signal code power of determining each auxilliary each time slot of frequency.

Step B is described to determine that the Initial Trans of each auxilliary frequency is: determine the Initial Trans on the DPCH of each auxilliary each time slot of frequency.

Steps A is described determines that the expectation received signal code power of each auxilliary frequency is: RNC calculates the expectation received signal code power of the corresponding time slot of each auxilliary frequency according to the Interference Signal Code Power of each auxilliary each time slot of frequency and the default signal interference ratio of corresponding service.

The expectation received signal code power of the corresponding time slot of described each auxilliary frequency equal on the corresponding time slot of each auxilliary frequency Interference Signal Code Power and the default signal interference ratio of corresponding service with.

The Initial Trans of described each auxilliary each time slot of frequency equals: the expectation received signal code power of corresponding time slot and the path loss sum that should assist frequency.

Behind the described received signal code power that obtains on the dominant frequency point PCCPCH, further comprise: the received signal code power on the dominant frequency point PCCPCH that obtains is reported RNC;

The path loss of described calculating dominant frequency point down channel is: RNC calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;

Described steps A is: UE obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency;

Described step B is: the path loss that RNC puts down channel with dominant frequency is approximately the path loss of auxilliary frequency, calculates Initial Trans on the corresponding time slot downward special physical channel of each auxilliary frequency in conjunction with the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency.

Initial Trans on the corresponding time slot downward special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot UE and the path loss sum that should assist frequency.

The path loss of described calculating dominant frequency point down channel is: UE calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;

Described steps A is: NodeB obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, and the result that will determine sends to UE;

Described step B is: the path loss that UE puts down channel with dominant frequency is approximately the path loss of assisting frequency, in conjunction with the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, calculate the Initial Trans on the corresponding time slot uplink special physical channel of each auxilliary frequency.

Initial Trans on the corresponding time slot uplink special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot NodeB and the path loss sum that should assist frequency.

Auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system, measure and report the Interference Signal Code Power of all auxilliary each time slots of frequency to radio network controller (RNC) by user terminal (UE) or base station (NodeB), and the approximation of auxilliary frequency of utilization and dominant frequency point path loss, with the path loss of dominant frequency point path loss as auxilliary frequency, calculate the Initial Trans on the auxilliary frequency up-downgoing DPCH, thereby realized the open Loop Power control on the auxilliary frequency in the N frequency TD-SCDMA system.

Description of drawings

Fig. 1 is the schematic flow sheet of the auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system;

Fig. 2 is used for the schematic flow sheet of auxilliary frequency down channel open Loop Power control for method shown in Figure 1;

Fig. 3 is used for the schematic flow sheet of auxilliary frequency up channel open Loop Power control for method shown in Figure 1.

Embodiment

For making purpose of the present invention, technical scheme and beneficial effect clearer,, the present invention is described in further detail below in conjunction with embodiment and accompanying drawing.

Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system, obtain received signal code power on the dominant frequency point Primary Common Control Physical Channel (PCCPCH) by measurement, and the Interference Signal Code Power on each time slot of auxilliary frequency, and the Interference Signal Code Power that will assist on each time slot of frequency reports RNC; Determine the expectation received signal code power of each auxilliary frequency; Calculate the path loss of dominant frequency point down channel, and it is approximately the path loss of auxilliary frequency; Last according to the Initial Trans on the path loss on the auxilliary frequency, the definite auxilliary frequency DPCH of expectation received signal code power.

Fig. 1 is the schematic flow sheet of the auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system, and as shown in Figure 1, the flow process of this auxiliary frequency point opened loop power control method may further comprise the steps:

Step 101 is obtained the received signal code power on the dominant frequency point PCCPCH, the Interference Signal Code Power on the auxilliary frequency, and the Interference Signal Code Power that will assist on the frequency reports RNC.

Here, the Interference Signal Code Power on the auxilliary frequency of each that obtain comprises: the Interference Signal Code Power of each time slot.

Step 102 is determined the expectation received signal code power of each auxilliary frequency.

Here, the expectation received signal code power of each auxilliary frequency comprises: the expectation received signal code power of each auxilliary each time slot of frequency.The expectation received signal code power of each auxilliary frequency can be divided into two kinds: the expectation received signal code power of the expectation received signal code power of the UE of corresponding down channel and the NodeB of corresponding up channel.

Concrete definite process is: RNC determines the expectation received signal code power of each time slot of each auxilliary frequency according to each the slot interfering signal of time sign indicating number power that receives and the default signal interference ratio of corresponding service.Usually, the expectation received signal code power of the corresponding time slot of each auxilliary frequency equal on the corresponding time slot of each auxilliary frequency Interference Signal Code Power and the default signal interference ratio of corresponding service with.

Described corresponding service can be adaptive multi-rate (AMR) business, bag professional (PS) or Circuit Service (CS) etc.

Step 103 is calculated the path loss of dominant frequency point down channel, and it is approximately the path loss of assisting frequency.

Here, the path loss of dominant frequency point down channel is determined by transmitted power on the dominant frequency point PCCPCH and received signal code power.

Step 104 according to path loss, the expectation received signal code power of auxilliary frequency, is determined the Initial Trans on each auxilliary frequency DPCH.

Usually, the Initial Trans of each auxilliary each time slot of frequency equals the expectation received signal code power and the path loss sum that should assist frequency of corresponding time slot.

The sequencings that above-mentionedsteps 102 and 103 is not carried out both can first execution instep 102, also can first execution instep 103.

The auxiliary frequency point opened loop power control of TD-SCDMA system can be divided into up channel and two kinds of situations of down channel.Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system both can be used for the open Loop Power control of auxilliary frequency up channel, also can be used for the open Loop Power control of auxilliary frequency down channel.

Referring to Fig. 2, Fig. 2 is used for the schematic flow sheet of auxilliary frequency down channel open Loop Power control for method shown in Figure 1.As shown in Figure 2, this auxilliary frequency down channel open Loop Power control flow process may further comprise the steps:

Step 201, UE measurement are obtained the received signal code power RSCP on the dominant frequency point PCCPCH_PCCPCH, assist the Interference Signal Code Power ISCP on each time slot of frequency down channel, and measurement result reported RNC.

Step 202, RNC is according to the transmitted power P on the dominant frequency point PCCPCH_PCCPCHWith received signal code power RSCP_PCCPCH, utilize formula (1) to calculate the path loss L of dominant frequency point down channel_PCCPCH, this value is approximately path loss on each auxilliary frequency.

L_PCCPCH＝P_PCCPCH-RSCP_PCCPCH (1)

Step 203, RNC is according to the default signal interference ratio (C/I) of slot interfering signal of time sign indicating number power ISCP and corresponding service_Des, utilize formula (2) to calculate the expectation received signal code power P of UE_Des, and result of calculation sent to UE.

P_des＝(C/I)_des+ISCP (2)

Step 204, RNC is according to the path loss L on the auxilliary frequency_PCCPCH, UE expectation received signal code power P_Des, utilize formula (3) to calculate the Initial Trans P that assists on the frequency downward special physical channel_DPCH

P_DPCH＝L_PCCPCH+P_des(3)

Referring to Fig. 3, Fig. 3 is used for the schematic flow sheet of auxilliary frequency up channel open Loop Power control for method shown in Figure 1.As shown in Figure 3, this auxilliary frequency up channel open Loop Power control flow process may further comprise the steps:

Step 301, NodeB measurement are obtained dominant frequency point and are assisted Interference Signal Code Power ISCP on up each time slot of frequency, and measurement result is reported RNC.

Step 302, RNC is according to the default signal interference ratio (C/I) of slot interfering signal of time sign indicating number power ISCP and corresponding service_Des, utilize formula (4) to calculate the expectation received signal code power PRX of NodeB_DPCHdes, and result of calculation sent to UE.

PRX_DPCHdes＝(C/I)_des+ISCP (4)

Step 303, UE measurement are obtained the received signal code power RSCP on the dominant frequency point PCCPCH_PCCPCH, according to the transmitted power P on the dominant frequency point PCCPCH_PCCPCHWith received signal code power RSCP_PCCPCH, utilize formula (1) to calculate the path loss L of dominant frequency point down channel_PCCPCH, this value is approximately path loss on each auxilliary frequency.

Step 304, UE is according to the path loss L on the auxilliary frequency_PCCPCH, NodeB expectation received signal code power PRX_DPCHdes, utilize formula (5) to calculate the Initial Trans P that assists on the frequency uplink special physical channel_DPCH

P_DPCH＝L_PCCPCH+PRX_DPCHdes (5)

Realize that the condition that the auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system need satisfy comprises: measure when the UE needs are supported the Interference Signal Code Power of the received signal code power on the main carrier frequency PCCPCH channel and all frequency descending time slots and report; Measure when NodeB need support the Interference Signal Code Power of all frequency ascending time slots and report.

Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system to the requirement of protocol modification is: support all down channels of a plurality of frequencies and the Interference Signal Code Power of each time slot of up channel to report in the measurement reporting message of UE and NodeB simultaneously.

Claims (10)

Translated fromChinese

1.一种时分-同步码分多址系统中的辅频点开环功率控制方法，获取主频点主公共控制信道PCCPCH上的接收信号码功率，计算主频点下行信道的路径损耗，其特征在于，该方法还包括以下步骤：1. an auxiliary frequency point open-loop power control method in a time division-synchronous code division multiple access system, obtain the received signal code power on the main common control channel PCCPCH of the main frequency point, calculate the path loss of the main frequency point downlink channel, its Characteristically, the method also includes the following steps:A、获取并向无线网络控制器RNC上报所有辅频点的干扰信号码功率，确定每个辅频点的期望接收信号码功率；A, acquire and report the interference signal code power of all auxiliary frequency points to the radio network controller RNC, and determine the expected reception signal code power of each auxiliary frequency point;B、将主频点下行信道的路径损耗近似为辅频点的路径损耗，结合步骤A获取的干扰信号码功率以及期望接收信号码功率，确定每个辅频点专用物理信道上的初始发射功率。B. Approximate the path loss of the downlink channel of the main frequency point to the path loss of the auxiliary frequency point, and combine the interference signal code power obtained in step A and the expected reception signal code power to determine the initial transmit power on the dedicated physical channel of each auxiliary frequency point .2.如权利要求1所述的方法，其特征在于，所述获取主频点PCCPCH上的接收信号码功率为：UE测量并获取主频点PCCPCH上的接收信号码功率；2. The method according to claim 1, wherein said obtaining the received signal code power on the main frequency point PCCPCH is: UE measures and obtains the received signal code power on the main frequency point PCCPCH;所述确定主频点下行信道的路径损耗为：根据主频点PCCPCH上的接收信号码功率以及发送功率，确定主频点下行信道的路径损耗。The determining the path loss of the downlink channel at the main frequency point includes: determining the path loss of the downlink channel at the main frequency point according to the received signal code power and the transmission power on the PCCPCH at the main frequency point.3.如权利要求1或2所述的方法，其特征在于，步骤A所述获取所有辅频点的干扰信号码功率为：获取所有辅频点各个时隙上的干扰信号码功率；3. The method according to claim 1 or 2, characterized in that, obtaining the interference signal code power of all auxiliary frequency points described in step A is: obtaining the interference signal code power on each time slot of all auxiliary frequency points;所述确定每个辅频点的期望接收信号码功率为：确定每个辅频点各个时隙的期望接收信号码功率。The determining the expected received signal code power of each auxiliary frequency point is: determining the expected received signal code power of each time slot of each auxiliary frequency point.步骤B所述确定每个辅频点的初始发射功率为：确定每个辅频点各个时隙的专用物理信道上的初始发射功率。The determination of the initial transmission power of each secondary frequency point in step B is: determining the initial transmission power on the dedicated physical channel of each time slot of each secondary frequency point.4.如权利要求3所述的方法，其特征在于，步骤A所述确定每个辅频点的期望接收信号码功率为：RNC根据每个辅频点各个时隙的干扰信号码功率和相应业务的缺省信干比，计算每个辅频点对应时隙的期望接收信号码功率。4. method as claimed in claim 3, is characterized in that, the described expected receiving signal code power of determining each auxiliary frequency point in step A is: RNC according to the interference signal code power and corresponding of each time slot of each auxiliary frequency point For the default signal-to-interference ratio of the service, calculate the expected received signal code power of the time slot corresponding to each auxiliary frequency point.5.如权利要求4所述的方法，其特征在于，所述每个辅频点对应时隙的期望接收信号码功率等于每个辅频点对应时隙上的干扰信号码功率与相应业务缺省信干比的和。5. The method according to claim 4, characterized in that, the expected received signal code power of each auxiliary frequency point corresponding to the time slot is equal to the interference signal code power on the corresponding time slot of each auxiliary frequency point and the corresponding service gap The sum of the letter-to-interference ratio.6.如权利要求1、2、4或5所述的方法，其特征在于，所述每个辅频点各个时隙的初始发射功率等于：对应时隙的期望接收信号码功率与该辅频点的路径损耗之和。6. The method according to claim 1, 2, 4 or 5, wherein the initial transmission power of each time slot of each auxiliary frequency point is equal to: the expected received signal code power of the corresponding time slot and the auxiliary frequency The sum of the path losses of the points.7.如权利要求1、2、4或5所述的方法，其特征在于，所述获取主频点PCCPCH上的接收信号码功率后，进一步包括：将获取的主频点PCCPCH上的接收信号码功率上报RNC；7. The method according to claim 1, 2, 4 or 5, characterized in that, after said acquiring the received signal code power on the main frequency point PCCPCH, further comprising: receiving signal code power on the main frequency point PCCPCH obtained Number power is reported to RNC;所述计算主频点下行信道的路径损耗为：RNC根据主频点PCCPCH上的发送功率以及接收信号码功率，计算主频点下行信道的路径损耗；The calculation of the path loss of the downlink channel at the main frequency point is as follows: RNC calculates the path loss of the downlink channel at the main frequency point according to the transmission power and the received signal code power on the main frequency point PCCPCH;所述步骤A为：UE获取并向无线网络控制器RNC上报所有辅频点的干扰信号码功率，RNC确定每个辅频点的对应时隙UE的期望接收信号码功率；The step A is: the UE obtains and reports the interference signal code power of all auxiliary frequency points to the radio network controller RNC, and the RNC determines the expected reception signal code power of the corresponding time slot UE of each auxiliary frequency point;所述步骤B为：RNC将主频点下行信道的路径损耗近似为辅频点的路径损耗，结合每个辅频点对应时隙UE的期望接收信号码功率计算每个辅频点对应时隙下行专用物理信道上的初始发射功率。The step B is: RNC approximates the path loss of the downlink channel at the main frequency point to the path loss of the auxiliary frequency point, and calculates the time slot corresponding to each auxiliary frequency point in combination with the expected received signal code power of the UE in the time slot corresponding to each auxiliary frequency point The initial transmit power on the downlink dedicated physical channel.8.如权利要求7所述的方法，其特征在于，所述每个辅频点对应时隙下行专用物理信道上的初始发射功率等于：对应时隙UE的期望接收信号码功率与该辅频点的路径损耗之和。8. The method according to claim 7, wherein the initial transmit power on the downlink dedicated physical channel corresponding to each secondary frequency point is equal to: the expected received signal code power of the corresponding time slot UE and the secondary frequency The sum of the path losses of the points.9.如权利要求1、2、4或5所述的方法，其特征在于，所述计算主频点下行信道的路径损耗为：UE根据主频点PCCPCH上的发送功率以及接收信号码功率，计算主频点下行信道的路径损耗；9. The method according to claim 1, 2, 4 or 5, wherein the calculation of the path loss of the main frequency point downlink channel is: UE transmits power and receives signal code power on the main frequency point PCCPCH, Calculate the path loss of the downlink channel at the main frequency point;所述步骤A为：NodeB获取并向无线网络控制器RNC上报所有辅频点的干扰信号码功率，RNC确定每个辅频点的对应时隙NodeB的期望接收信号码功率，并将确定的结果发送给UE；The step A is: NodeB obtains and reports the interference signal code power of all secondary frequency points to the radio network controller RNC, and the RNC determines the expected received signal code power of NodeB in the corresponding time slot of each secondary frequency point, and sends the determined result send to UE;所述步骤B为：UE将主频点下行信道的路径损耗近似为辅频点的路径损耗，结合每个辅频点对应时隙NodeB的期望接收信号码功率，计算每个辅频点对应时隙上行专用物理信道上的初始发射功率。The step B is: the UE approximates the path loss of the downlink channel at the main frequency point to the path loss of the auxiliary frequency point, and calculates the time corresponding to each auxiliary frequency point in combination with the expected received signal code power of the NodeB corresponding to each auxiliary frequency point. The initial transmit power on the slot uplink dedicated physical channel.10.如权利要求9所述的方法，其特征在于，所述每个辅频点对应时隙上行专用物理信道上的初始发射功率等于：对应时隙NodeB的期望接收信号码功率与该辅频点的路径损耗之和。10. The method according to claim 9, wherein the initial transmission power on the corresponding time slot uplink dedicated physical channel of each auxiliary frequency point is equal to: the expected received signal code power of the corresponding time slot NodeB and the auxiliary frequency The sum of the path losses of the points.

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