UE SUPPORTING LOW-LATENCY WIRELESS COMMUNICATION, METHOD AND APPARATUS IN BASE STATION

• US 20180198588A1
• Filed: 03/08/2018
• Published: 07/12/2018
• Est. Priority Date: 09/10/2015
• Status: Active Grant

• Current Assignee: Shanghai Langbo Communication Technology Company Limited
• Original Assignee: Shanghai Langbo Communication Technology Company Limited
• Inventors: ZHANG, Xiaobo
• Granted Patent: US 10,484,157 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

A UE receives a first signaling indicating whether a Reference Signal (RS) pattern of a target RS set is a first pattern or a second pattern in a second LTE timeslot. Next, according to the indication of the first signaling, the target RS set and a second data are processed by a first operation in the second LTE. The target RS set includes P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports. The second data is transmitted by the P antenna ports. The second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot. The first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal in the LTE timeslot. This reduces network delay, improves channel estimation performance in short TTI scenes and maintains compatibility with current LTE equipment.

Claims

1. A method in a User Equipment (UE) supporting low-latency wireless communication, comprising:

Step A;

receiving a first signaling, the first signaling indicating at least one of the following;

first information;

whether a target Reference Signal (RS) set is transmitted in a first Long Term Evolution (LTE) timeslot;

second information;

whether the RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; and

Step B;

according to the indication of the first signaling, processing the target RS set and a second data by a first operation in the second LTE timeslot;

wherein the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports;

the second data is transmitted by the P antenna ports;

the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot;

the first operation is receiving and the first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal (URS) in the LTE timeslot, or the first operation is transmitting and the first pattern is the RS pattern of the LTE uplink DeModulation Reference Signal (DMRS) in the LTE timeslot.

2. The method in a UE supporting low-latency wireless communication according to claim 1, wherein the first operation is receiving and the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration, or, the first operation is transmitting and the second pattern comprises the second Single Carrier-Frequency Division Multiplexing Access (SC-FDMA) symbol and the sixth SC-FDMA symbol in the second LTE timeslot.

3. The method in a UE supporting low-latency wireless communication according to claim 1, wherein Step A further comprises:

Step A1;

processing the target RS set by the first operation in the first LTE timeslot;

Step B further comprises;

Step B1;

according to the target RS set received in the first LTE timeslot and the second LTE timeslot, estimating a parameter of a wireless channel through which the second data passes;

wherein the first operation is receiving and the first information indicates that the target RS set is transmitted in the first LTE timeslot.

4. The method in a UE supporting low-latency wireless communication according to claim 1, wherein Step B further comprises:

Step B2;

according to the target RS set received in the second LTE timeslot, estimating a parameter of a wireless channel through which the second data passes;

wherein the first operation is receiving, the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot.

5. The method in a UE supporting low-latency wireless communication according to claim 1, wherein the target RS set comprises P LTE downlink URSs in the first LTE timeslot and the second LTE timeslot, or, the target RS set comprises P LTE uplink DMRSs in a first LTE subframe and a second LTE subframe.

6. The method in a UE supporting low-latency wireless communication according to claim 1, wherein if the target RS set is transmitted in the first LTE timeslot, the RS pattern of the target RS set is the first pattern in the second LTE timeslot;

otherwise, the RS pattern of the target RS set is the second pattern in the second LTE timeslot.

7. A method in a base station supporting low-latency wireless communication, comprising:

Step A;

transmitting a first signaling, the first signaling indicating at least one of the following;

first information;

whether a target RS set is transmitted in a first LTE timeslot;

second information;

whether the RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; and

Step B;

according to the indication of the first signaling, processing the target RS set and a second data by a second operation in the second LTE timeslot;

wherein the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports;

the second data is transmitted by the P antenna ports;

the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot;

the second operation is transmitting and the first pattern is the RS pattern of the LTE downlink URS in the LTE timeslot, or the second operation is receiving and the first pattern is the RS pattern of the LTE uplink DMRS in the LTE timeslot.

8. The method in a base station supporting low-latency wireless communication according to claim 7, wherein the second operation is transmitting and the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration, or, the second operation is receiving and the second pattern comprises the second SC-FDMA symbol and the sixth SC-FDMA symbol in the second LTE timeslot.

9. The method in a base station supporting low-latency wireless communication according to claim 7, wherein Step A further comprises:

Step A1;

processing the target RS set by the second operation in the first LTE timeslot;

wherein the second operation is transmitting and the first information indicates that the target RS set is transmitted in the first LTE timeslot.

10. The method in a base station supporting low-latency wireless communication according to claim 7, wherein Step B further comprises:

Step B2;

determining a modulation coding mode of the second data according to the following assumptions;

a target UE estimates a parameter of a wireless channel through which the second data passes according to the target RS set received in the second LTE timeslot;

wherein the second operation is transmitting, the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot; and

the target UE is a receiving UE of the target RS set.

11. The method in a base station supporting low-latency wireless communication according to claim 7, wherein the target RS set comprises P LTE downlink URSs in the first LTE timeslot and the second LTE timeslot, or, the target RS set comprises P LTE uplink DMRSs in a first LTE subframe and a second LTE subframe.

12. The method in a base station supporting low-latency wireless communication according to claim 7, wherein if the target RS set is transmitted in the first LTE timeslot, the RS pattern of the target RS set is the first pattern in the second LTE timeslot;

otherwise, the RS pattern of the target RS set is the second pattern in the second LTE timeslot.

13. A UE supporting low-latency wireless communication, comprising:

a first module, which is configured to receive a first signaling, the first signaling indicating at least one of the following;

first information;

whether a target RS set is transmitted in a first LTE timeslot;

second information;

whether the RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot;

a second module, which is configured to process the target RS set and a second data by a first operation in the second LTE timeslot according to the indication of the first signaling;

wherein the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports;

the second data is transmitted by the P antenna ports;

the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot;

the first operation is receiving and the first pattern is the RS pattern of the LTE downlink URS in the LTE timeslot, or the first operation is transmitting and the first pattern is the RS pattern of the LTE uplink DMRS in the LTE timeslot.

14. The UE supporting low-latency wireless communication according to claim 13, wherein the first operation is receiving and the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration, or, the first operation is transmitting and the second pattern comprises the second SC-FDMA symbol and the sixth SC-FDMA symbol in the second LTE timeslot.

15. A base station apparatus supporting low-latency wireless communication, comprising:

a first module, which is configured to transmit a first signaling, the first signaling indicating at least one of the following;

first information;

whether a target RS set is transmitted in a first LTE timeslot;

second information;

whether the RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot;

a second module, which is configured to process the target RS set and a second data by a second operation in the second LTE according to the indication of the first signaling;

wherein the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports;

the second data is transmitted by the P antenna ports;

the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot;

the second operation is transmitting and the first pattern is the RS pattern of the LTE downlink URS in the LTE timeslot, or the second operation is receiving and the first pattern is the RS pattern of the LTE uplink DMRS in the LTE timeslot.

16. The base station apparatus supporting low-latency wireless communication according to claim 15, wherein the second operation is transmitting and the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration, or, the second operation is receiving and the second pattern comprises the second SC-FDMA symbol and the sixth SC-FDMA symbol in the second LTE timeslot.