Outer ring power control method under multi-service circumstances
An outer-loop power control and multi-service technology, applied in the direction of transmission control/balance, can solve the problems of limiting system capacity and waste of power resources, and achieve the effect of improving system capacity and reducing power waste.
Active Publication Date: 2005-09-07
XIAMEN UNISOC TECH CO LTD
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Problems solved by technology
The result of this method is that the actual quality of each service is higher than the target quality, resulting in a waste of power resources. In the initial stage of network construction, due to the small number of users, this method has little relationship, but with the increase of the number of users, this method will limit the capacity of the system
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[0020] The specific processing flow of the present invention is described in detail below, and the flow chart is referring to the appended image 3 .
[0021] Step 1: Select a transport channel as TrCHref for OLPC. Here, the TrCH corresponding to the service with the highest priority is selected, and the priority of each service is set by the network side.
[0022] Step 2: Start a timer Timer. The formula for calculating the initial timing length TimerLenght is:
[0023]
[0024] TimerLength=MAX{TimerLength i}
[0025] Where i=1, 2,..., N, N is the total number of transmission channels, OLPCPeriodi is the power control period corresponding to the i-th TrCH, BLERtargeti is the quality target value corresponding to the i-th TrCH, TTIi and MaxTBPerTTIi are the i-th TrCH respectively TrCH transmission time interval and the maximum number of transport blocks transmitted in one TTI. The timing length when this timer is restarted is described below.
[0026] Step 3: Perform...
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The invention provides an outer-loop power controlling method on the multi-service condition, including the steps: A. firstly selecting a transmission channel as a reference transmission channel; B. after the outer-loop power control of the reference transmission channel converges, judging the QoSs (quality of service, QoS) of the other services; C. if the QoSs of the other services are near to or superior to the corresponding target values of quality, keeping the reference transmission channel invariant; D. if the QoS of one or many services in the other services is lower than the corresponding target value of quality, selecting the corresponding channel to the service whose gap between actual quality and target quality is the maximum to act as a new reference transmission channel and using the new one for the outer-loop power control, and so circulating until all the QoSs of the other services are near to or superior to the corresponding target values of quality. On the premise of meeting the QoS of each service of the user, the invention can reduce the waste of power resources and raise the system capacity.
Description
technical field [0001] The invention relates to a power control method in a code division multiple access (CDMA) mobile communication system, in particular to an outer loop power control method in the case of multiple services. Background technique [0002] The CDMA mobile communication system is a self-interference system, that is, the increase of a user's power will also increase the interference to other users. The purpose of introducing outer loop power control is to use the least power resources to ensure the quality of service (QoS) of users. Avoiding waste of power resources while reducing interference to other users and improving system capacity. [0003] The basic principle of the outer loop power control is to determine the inner loop by comparing the actual estimated or monitored service quality (such as block error rate or bit error rate) with the service quality requested by the user (such as the target value of block error rate or bit error rate). The signal-t...
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IPC IPC(8): H04B7/005
Inventor 张严
Owner XIAMEN UNISOC TECH CO LTD