Uplink power control method used for LTE (Long Term Evolution) communication system
A power control and communication system technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of reducing terminal usage time, increasing power consumption, and deteriorating user experience, so as to achieve flexible and sufficient selection of tpc-group Use channel resources and threshold value to set convenient effects
Active Publication Date: 2018-09-18
WUHAN HONGXIN TECH DEV CO LTD
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The first is to add user information to the command word TPC3 / 3A (Transmit Power Control 3 / 3A, transmission power control 3 / 3A) queue, when the queue is not empty, in the PDCCH (Physical Downlink ControlChannel, physical downlink control channel) TPC command words are grouped on the remaining resources. This solution can effectively adjust the uplink transmission power. However, when there is no data service in the uplink / downlink for a long time, it will cause frequent communication between the base station and users, increasing power consumption. battery, reducing the duration of terminal use, making the user experience worse; the second is to configure a timer for each tpc-group (transmit power control-group, transmission power control group), and when timeout triggers the function of the group of users This solution reduces the frequency of communication between the base station and users, but because only one group of users can issue TPC command words each time to adjust the uplink transmission power, the timeliness is reduced, and the CCE resources in the PDCCH public space cannot be fully obtained. use
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[0021] The technical solutions of the present invention will be further described in detail below through the embodiments in conjunction with the accompanying drawings.
[0022] The present invention conducts unified management on all UEs according to tpc-group through the base station side, configures timers for each tpc-group and included UEs, and updates in real time according to the service status of UEs. The updated tpc-group timer T tpc_rnti and threshold T th For comparison, tpc-groups greater than or equal to the threshold value are added to the candidate list, and all T in the candidate list tpc_rnti Sort from largest to smallest, assign the remaining CCE resources after scheduling to the corresponding tpc-group according to the sorting results, and finally use PDCCH DCI format3 / 3A (PDCCH Downlink Control Information format 3 / 3A, PDCCH downlink control information format 3 / 3A) Send a TPC command word to the tpc-group allocated to the CCE resource.
[0023] See atta...
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The invention provides an uplink power control method used for LTE communication system. The method comprises the steps of: configuring timers for each transmit power control group tpc-group and included user UE by a base station side, and updating in real time according to business state of the UE when dispatching; according to the timers, selecting and adding the tpc-group that satisfies the condition into a candidate list; according to a size sorting result, dispatching rest CCE (Control Channel Element) resource for corresponding tpc-group in sequence after the dispatch is finished; and, issuing TPC (Transmit Power Control) command words. The TPC command words are the transmit power control command words. By adoption of the method, in the scenario of having no uplink / downlink authorization to issue the TPC command words when the user has no uplink / downlink service in a period of time, the suitable tpc-group is selected to issue the TPC command words, so as to make full use of the channel resource, reduce the signaling overheads, and effectively and timely adjust the uplink transmit power to ensure the uplink / downlink throughput of the base station.
Description
technical field [0001] The present invention relates to the field of mobile communication, in particular to an uplink power control method used in an LTE (Long Term Evolution, long term evolution) communication system. Background technique [0002] In the LTE communication system, due to the path loss of the user (UE) in the serving cell, unreasonable uplink transmission power will cause inter-cell interference, increase the battery consumption of the user and shorten the service life, thereby affecting the overall service performance of the system. When users are doing uplink / downlink data services, they can use uplink / downlink authorization to issue TPC command words (TransmitPower Control Command, transmission power control command words) in real time, which is convenient for users to adjust the transmit power of uplink signals, but in actual application scenarios , the user's location is time-shifted, and the data traffic is also uncertain. When the user has no data serv...
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IPC IPC(8): H04W52/14H04W52/54
CPCH04W52/146H04W52/54
Inventor 张敏俞锦冯伟丁晓东姜琳峰
Owner WUHAN HONGXIN TECH DEV CO LTD