Data transmission method, user equipment, and base station

Patent metadata

Field	Value
Publication number	US-10779284-B2
Application number	US-201815892419-A
Country	US
Kind code	B2
Filing date	Feb 9, 2018
Priority date	Aug 12, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Embodiments of the present application provide a data transmission method. The method includes: sending, by user equipment, uplink data to a base station by using an uplink user equipment relay; and receiving, by the user equipment, downlink data from the base station, or receiving, by the user equipment, downlink data from the base station by using a downlink user equipment relay. Uplink transmission and downlink transmission are separately performed in different transmission paths, so as to reduce impact of a fault of a user equipment relay on a network, and improve network reliability.

First claim

What is claimed is:

1. A data transmission method, comprising:
sending, by user equipment (UE), uplink data to a base station by using an uplink user equipment relay (uplink UE-relay), wherein the uplink UE-relay comprises a second UE;
receiving, by the UE, downlink data from the base station; and
receiving, by the UE, indication information from the uplink UE-relay, wherein the indication information indicates a downlink transmission resource corresponding to the uplink UE-relay; and, wherein
the downlink data is a response to the uplink data, and the downlink data is received, by the UE and the uplink UE-relay, from the base station according to the downlink transmission resource.

2. The method according to claim 1 , wherein the indication information is second indication information, the method further comprising:
sending, by the UE, first indication information to the uplink UE-relay, wherein the first indication information indicates an uplink transmission resource corresponding to the UE, so that the uplink UE-relay sends the uplink data to the base station according to the uplink transmission resource.

3. The method according to claim 2 , wherein
the uplink transmission resource comprises a physical uplink control channel (PUCCH) resource; and
the first indication information comprises n CCE and N PUCCH (1) , wherein n CCE indicates a number of a first control channel element (CCE) that is in a physical downlink control channel (PDCCH) and that indicates downlink transmission, and N PUCCH (1) indicates a UE-dedicated PUCCH ACK/NACK resource offset or indicates a PUCCH format 1a/1b start offset used for a subframe set K2.

4. The method according to claim 2 , wherein
the downlink transmission resource comprises a physical hybrid automatic repeat request indicator channel (PHICH) resource; and
the second indication information comprises n DMRS and I PRB_RA lowest_index , wherein n DMRS indicates a demodulation reference signal (DMRS) offset, and I PRB_RA lowest_index indicates a minimum index of a physical resource block (PRB) for uplink transmission.

5. The method according to claim 1 , further comprising:
receiving, by the UE, a reply of the uplink UE-relay to the uplink data from the uplink UE-relay.

6. The method according to claim 1 , wherein the UE receives the downlink data from the base station by using a downlink UE-relay, wherein the downlink UE-relay comprises a third UE, and the method further comprises:
sending, by the UE, a reply of the UE to the downlink data to the downlink UE-relay.

7. A data transmission method, comprising:
receiving, by a base station, uplink data of user equipment (UE) by using an uplink user equipment relay (uplink UE-relay), wherein the uplink UE-relay comprises a second UE;
sending, by the base station, downlink data to the UE, wherein the downlink data is a response to the uplink data;
sending, by the base station, the downlink data to the uplink UE-relay according to a downlink transmission resource corresponding to the uplink UE-relay;
transmitting, to the UE, indication information from the uplink UE-relay, wherein the indication information indicates the downlink transmission resource; and, wherein
UE is configured to receive the downlink data according to the downlink transmission resource.

8. The method according to claim 7 , wherein receiving, by the base station, uplink data of user equipment (UE) by using the uplink user equipment relay (uplink UE-relay) comprises:
receiving, by the base station, the uplink data of the UE from the uplink UE-relay according to an uplink transmission resource corresponding to the UE.

9. The method according to claim 8 , wherein receiving, by the base station, the uplink data of the UE from the uplink UE-relay according to the uplink transmission resource corresponding to the UE comprises:
receiving, by the base station, the uplink data from the uplink UE-relay according to the uplink transmission resource after a delay of m transmission time intervals (TTIs), wherein m is a positive integer.

10. User equipment, comprising:
a processor and a memory associated with the processor, wherein
the memory comprises an instruction to be executed by the processor, wherein when the instruction is executed, the processor is caused to perform:
sending uplink data to a base station by using an uplink user equipment relay (uplink UE-relay), wherein the uplink UE-relay comprises a second UE;
receiving downlink data from the base station, and
receiving indication information from the uplink UE-relay, wherein the indication information indicates a downlink transmission resource corresponding to the uplink UE-relay; and, wherein
the downlink data is a response to the uplink data, and the downlink data is received, by the UE and the uplink UE-relay, from the base station according to the downlink transmission resource.

11. The user equipment according to claim 10 , wherein the indication information is second indication information, and wherein the processor is further caused to perform:
sending first indication information to the uplink UE-relay, wherein the first indication information indicates an uplink transmission resource corresponding to the UE, so that the uplink UE-relay sends the uplink data to the base station according to the uplink transmission resource.

12. The user equipment according to claim 11 , wherein
the uplink transmission resource comprises a physical uplink control channel (PUCCH) resource; and
the first indication information comprises n CCE and N PUCCH (1) , wherein n CCE indicates a number of a first control channel element (CCE) that is in a physical downlink control channel (PDCCH) and that indicates downlink transmission, and N PUCCH (1) indicates a UE-dedicated PUCCH ACK/NACK resource offset or indicates a PUCCH format 1a/1b start offset for a subframe set K2.

13. The user equipment according to claim 11 , wherein
the downlink transmission resource comprises a physical hybrid automatic repeat request indicator channel (PHICH) resource; and
the second indication information comprises n DMRS and I PRB_RA lowest_index , wherein n DMRS indicates a demodulation reference signal (DMRS) offset, and I PRB_RA lowest_index indicates a minimum index of a physical resource block (PRB) for uplink transmission.

14. The user equipment according to claim 10 , wherein
the processor is further caused to perform: receiving a reply of the uplink UE-relay to the uplink data from the uplink UE-relay.

15. The user equipment according to claim 10 , wherein the downlink data is received from the base station by using a downlink UE-relay, wherein the downlink UE-relay comprises a third UE, and the processor is further caused to perform: sending a reply of the user equipment to the downlink data to the downlink UE-relay.

16. A base station, comprising:
a processor and a memory associated with the processor, wherein
the memory comprises an instruction to be executed by the processor, wherein when the instruction is executed, the processor is caused to perform:
receiving uplink data of user equipment (UE) by using an uplink user equipment relay (uplink UE-relay), wherein the uplink UE-relay comprises a second UE;
sending downlink data to the UE, wherein the downlink data is a response to the uplink data;
sending the downlink data to the uplink UE-relay according to a downlink transmission resource corresponding to the uplink UE-relay; and;
transmitting, to the UE, indication information from the uplink UE-relay, wherein the indication information ind

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhou Guohua
• Wei Dongdong
• Tang Zhenfei

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/51 Primary

  based on terminal or device properties · CPC title

• H04W88/04 Primary

  adapted for relaying to or from another terminal or user · CPC title

• H04W40/22

  using selective relaying for reaching a BTS [Base Transceiver Station] or an access point · CPC title