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Terminal D2D (device-to-device) cooperation relay communication implementation method in TD-LTE-A (time division-long term evolution-advanced) system

A technology of cooperative relay and implementation method, applied in the directions of wireless communication, electrical components, network data management, etc., can solve the problems of frequency selective fading, increase the transmit power of the base station, high cost, etc., to improve the system throughput and reduce the construction cost. The effect of improving network cost and service quality

Inactive Publication Date: 2012-11-14
HARBIN INST OF TECH
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Problems solved by technology

Under the condition that the transmission power of the base station is constant, achieving a high communication rate will inevitably affect the coverage of the system, and the frequencies of the spectrum resources that the LTE-Advanced system may obtain are generally above 2G, and the frequency selective fading is more serious. The communication quality of edge users will not be guaranteed
In order to solve the LTE_A cell coverage problem, it is impractical to simply increase the base station transmission power or increase the number of base stations. Even if some relay facilities are added to LTE_A, the cost is extremely high

Method used

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  • Terminal D2D (device-to-device) cooperation relay communication implementation method in TD-LTE-A (time division-long term evolution-advanced) system
  • Terminal D2D (device-to-device) cooperation relay communication implementation method in TD-LTE-A (time division-long term evolution-advanced) system
  • Terminal D2D (device-to-device) cooperation relay communication implementation method in TD-LTE-A (time division-long term evolution-advanced) system

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specific Embodiment approach 1

[0024] Specific implementation mode 1. Combination figure 1 and figure 2 Describe this specific implementation mode, a method for implementing D2D cooperative relay communication of terminals in a TD_LTE_A system, which is implemented by the following steps:

[0025] Step 1. In the TD_LTE_A system, the terminal cell user in the communication state sends a reference signal CQI for detecting channel quality to the base station;

[0026] Step 2, the base station judges whether there is a cell user whose channel quality cannot meet the normal communication QoS requirements according to the CQI value reported by the terminal cell user in the communication state described in step 1, if the judgment result is no, then return to execute step 1; If the judgment result is yes, go to step 3;

[0027] Step 3. The base station combines the formula according to the load of the current network, the distribution of users in the idle cell, and the number N of users in the idle cell:

[002...

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Abstract

The invention discloses a terminal D2D (device-to-device) cooperation relay communication implementation method in a TD-LTE-A (time division-long term evolution-advanced) system, and relates to a relay communication implementation method in the TD-LTE-A system. The method disclosed by the invention aims at realizing communication coverage on terminals in the TD-LTE-A system under a 4G (4th generation) standard and improving service quality and system throughput. According to the method disclosed by the invention, an on-net idle user in a cell is used as a mobile relay, terminal D2D cooperation relay communication is established with a user on the edge of the cell, relay service is provided for the user on the edge of the cell, the coverage range of the cell, the service quality of the user on the edge and the system throughput are significantly improved by resource allocation and time slot allocation of the cell, and the network construction cost of the system can be further greatly reduced. The method disclosed by the invention is suitable for the TD-LTE-A system.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for realizing relay communication of a terminal in a TD_LTE_A system. Background technique [0002] Mobile communication technology has achieved rapid development in the past ten years, and the International Telecommunication Union formally considered and approved LTE-Advanced and WirelessMAN-Advanced technical specifications as IMT-Advanced (ie: 4G) at the 2012 Radiocommunication Plenary Session. international standard. Among them, LTE-Advanced includes two modes of LTE_A_FDD and LTE_ATDD. LTE_ATDD is TD_LTE_A, which is a proposal proposed by our country and hosted by our country for system development. [0003] The early 3G system can only reach the speed of 2Mbps, and the current 4G standard, because the key technology uses technologies such as Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), Carrier Aggregation and Dynamic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/14H04W72/12H04W88/04
Inventor 吴玮管修挚吴宣利李卓明白旭沙学军
Owner HARBIN INST OF TECH
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