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Relay transmission method and user equipment

A transmission method and retransmission technology, applied in transmission systems, digital transmission systems, transmission modification based on link quality, etc., can solve problems such as inability to guarantee service continuity, achieve service continuity, improve success rate, good The effect of compatibility

Pending Publication Date: 2019-09-27
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The relay transmission methods in the disclosed technologies all belong to the relay forwarding based on layer 3, switching the relay path at the remote node (for example, switching from relay transmission to direct transmission between the base station, or switching the relay node) and performing Service continuity cannot be guaranteed during handover

Method used

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  • Relay transmission method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] Embodiment 1. Relay UE forwards downlink data and downlink control information

[0145] see Figure 5 , Figure 5 The communication process between the base station, the relay UE, and the remote UE in this embodiment is shown:

[0146] (1) The base station sends the first PDCCH (downlink control channel) to the relay UE, and the PDCCH indicates the following scheduling information of the first PDSCH, the second PDCCH and the second PDSCH.

[0147] (2) The base station sends the first PDSCH to the relay UE, and the PDSCH carries downlink data of the remote UE.

[0148] (3) The relay UE sends the second PDCCH to the remote UE, and the PDCCH indicates the scheduling information of the second PDSCH below.

[0149] (4) The relay UE sends the second PDSCH to the remote UE, and the PDSCH forwards the downlink data of the remote UE carried by the first PDSCH.

[0150] *Multiple possibilities of the first PDCCH

[0151] In this embodiment, the first PDCCH may include one or...

Embodiment 2

[0171] Embodiment 2. The relay UE only forwards downlink data and does not forward downlink control information (the first PDSCH and the second PDSCH are scheduled separately)

[0172] see Figure 6 , Figure 6 The communication process between the base station, the relay UE, and the remote UE in this embodiment is shown:

[0173] (1) The base station sends the first PDCCH to the relay UE, and the PDCCH indicates the scheduling information of the following first PDSCH.

[0174] (2) The base station sends the first PDSCH to the relay UE, and the PDSCH carries downlink data of the remote UE.

[0175] (3) The base station directly sends the second PDCCH to the remote UE, and the PDCCH indicates the scheduling information of the second PDSCH below.

[0176] (4) The relay UE monitors the above second PDCCH, and based on the scheduling information indicated by the second PDCCH, sends the second PDSCH to the remote UE, and the PDSCH forwards the downlink data of the remote UE carr...

Embodiment 3

[0181] Embodiment 3. The relay UE only forwards downlink data and does not forward downlink control information (the first PDSCH and the second PDSCH adopt the same scheduling)

[0182] see Figure 7 , Figure 7 The communication process between the base station, the relay UE, and the remote UE in this embodiment is shown:

[0183] (1) The base station directly sends the first PDCCH to the remote UE, and the PDCCH indicates the scheduling information of the following second PDSCH.

[0184] (2) The base station sends the first PDSCH to the relay UE, the PDSCH carries the data of the remote UE, and uses the same scheduling information as the following second PDSCH. The relay UE monitors the above first PDCCH, and receives the first PDSCH based on the scheduling information indicated by the first PDCCH.

[0185](3) The relay UE sends the second PDSCH to the remote UE based on the scheduling information indicated by the first PDCCH, and the PDSCH forwards the downlink data of t...

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Abstract

The invention discloses a relay transmission method. The method comprises the following steps: first UE receives a downlink control channel PDCCH; the first UE acquires scheduling information of a first data channel and scheduling information of a second data channel according to the PDCCH, the first data channel being a physical channel which is received by the first UE and carries data of the second UE, and the second data channel being a physical channel which is forwarded by the first UE and carries data of the second UE; and the first UE forwards data between the base station and the second UE according to the scheduling information of the first data channel and the scheduling information of the second data channel. Compared with the prior art, the relay transmission service is provided for the remote node of the mobile communication network through the relay node in the first layer / the second layer, the service continuity of the remote node is guaranteed, and the success rate of remote node data transmission is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, to a relay transmission method and user equipment. Background technique [0002] In LTE (Long Term Evolution, long-term evolution) technology, information exchange will be performed between the base station and the terminal equipment (UE). Since some UEs may be far away from the base station, this part of the terminal cannot access the base station, or the signal is poor. In order to meet the requirements for communication rate and communication quality, relay technology is required between terminals and base stations to ensure information interaction between terminals and base stations, and to improve cell coverage expansion, cell capacity, and cell throughput. Therefore, how to carry out relay transmission becomes a key issue. [0003] The relay transmission methods in the disclosed technologies all belong to the relay forwarding based on layer 3, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/14H04W88/04H04L1/00H04L1/16H04L1/18
CPCH04W88/04H04L1/1812H04L1/1607H04L1/0027H04L1/0026H04W72/23
Inventor 吴敏孙霏菲付景兴周淼熊琦
Owner BEIJING SAMSUNG TELECOM R&D CENT
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