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Data transmission method and device for relay system

A data transmission method and technology of a relay system, applied in the field of data transmission methods and devices, can solve the problem of not providing a data transmission method and process, and achieve the effect of controlling interference

Active Publication Date: 2013-03-20
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although LTE-A gives the above definition of type 2, it does not give the specific data transmission methods and procedures between the relay and the eNB, as well as with the UE.

Method used

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  • Data transmission method and device for relay system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, the implementation manner of transmitting PDSCH data to the UE each time is described without considering the situation of retransmission.

[0054] In this embodiment, when it is necessary to deliver PDSCH data to a certain type 2R-UE, the eNB uses at least one type 2 relay serving the type 2R-UE to forward the PDSCH data after beamforming processing to the type 2R-UE. Type 2 R-UE; the eNB directly sends the scheduling information corresponding to the PDSCH data to the type 2 R-UE through the PDCCH; all type 2 relays that forward the PDSCH data send the DRS corresponding to the beamforming process to the type 2 R-UE Type 2R-UE;

[0055] The type 2 R-UE directly receives the scheduling information corresponding to the PDSCH data carried by the PDCCH from the eNB, and receives the PDSCH data and DRS from the type 2 relay, combines all the received PDSCH data, and performs all the received DRS combined, and then use the combined DRS to demodulate the c...

example 1

[0057] Example 1: Using a type 2 relay RN A to serve a type 2 R-UE (hereinafter referred to as UE B) for relay forwarding, specifically including:

[0058] Step 101 , in downlink time slot 1, eNB sends PDSCH data and scheduling information of PDSCH data in downlink time slot 1 and downlink time slot 2 to RN A.

[0059] Among them, the PDSCH data sent to RN A is the PDSCH data sent to UE B in a downlink time slot scheduled by the system; the UE B is the UE served by RN A;

[0060] The method for eNB to send downlink slot 1 scheduling information to RN A is: use the C-RNTI of RNA on PDCCH to send the scheduling information in downlink slot 1, where C-RNTI is the node in the system (including relay and UE) ) in the system is unique in the whole network;

[0061] The way for eNB to send the downlink time slot 2 scheduling information to RN A may be: use the relayed C-RNTI to send on the PDCCH, or use the PDSCH between the eNB and RN A to transmit the downlink time slot 2 scheduli...

example 2

[0064] Example 2: The eNB determines to use multiple relays serving Type 2R-UE (hereinafter referred to as UE B) for data transmission, and the multiple relays form a relay set C. The specific data transmission process includes:

[0065] Step 201 , in downlink time slot 1, the eNB sends PDSCH data and scheduling information of PDSCH data in downlink time slot 1 and downlink time slot 2 to each relay in relay set C.

[0066] Among them, the PDSCH data sent to RN A is the PDSCH data sent to UE B in a downlink time slot scheduled by the system; the UE B is the UE served by RN A;

[0067] The eNB sends the downlink time slot 1 scheduling information to each relay in the relay set C by using the C-RNTI of each relay on the PDCCH to send the downlink time slot 1 scheduling information;

[0068] The eNB can send downlink slot 2 scheduling information to each relay in the relay set C by using the C-RNTI of each relay on the PDCCH to send, or it can also use the PDSCH with each relay ...

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Abstract

A method for data transmission in relay system, includes that: modulation information corresponding to the data of a physical downlink shared channel (PDSCH) is transmitted via a physical downlink control channel (PDCCH) to a user equipment (UE) served by a type 2 relay station; a preset beam-forming processing is performed on the data of the PDSCH, and the processed data of the PDSCH and the dedicated pilot corresponding to the beam-forming processing are transmitted to the UE; an evolved Node B (eNB) directly transmits the common reference signal (CRS) used to demodulate the PDCCH to the UE, and the type 2 relay station does not transmit the CRS to the UE. The present invention also provides concrete structures of the eNB and the type 2 relay station. The application of the present invention can implement concrete data transmission in the system in which the type 2 relay station is introduced.

Description

technical field [0001] The invention relates to the relay technology in the communication system, in particular to a data sending method and device in the relay system. Background technique [0002] In the LTE-A system, in order to improve system throughput and increase network coverage, a relay node (Relay Node, RN), hereinafter referred to as a relay, is introduced. Specifically, the network structure of the LTE-A system that introduces the relay node is as follows: figure 1 shown. [0003] Wherein, the eNB is connected to the core network (CN) through a wired interface, the RN is connected to the eNB through a wireless interface, and the UE is connected to the RN or eNB through a wireless interface. Both the RN and the eNB can provide services for the UE, the UE served by the RN is called a relay UE (R-UE), and the UE directly served by the eNB is called a macro UE. [0004] Currently, there are two types of relays, namely type 1 and type 2, and the definition of type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/26H04W28/04H04W72/12H04W88/08H04L1/08
CPCH04B7/2606
Inventor 王立波张文健潘学明肖国军沈祖康
Owner DATANG MOBILE COMM EQUIP CO LTD