Data scheduling and transmission method, apparatus, and system

Patent metadata

Field	Value
Publication number	US-2018367282-A1
Application number	US-201615772770-A
Country	US
Kind code	A1
Filing date	Oct 14, 2016
Priority date	Nov 3, 2015
Publication date	Dec 20, 2018
Grant date	—

Abstract

The present disclosure provides a data scheduling and transmission method, apparatus and system. The data scheduling method includes: configuring scheduling information according to a predetermined unlicensed-uplink-subframe scheduling mode, where the scheduling information is used for instructing a terminal to transmit uplink data on an unlicensed frequency spectrum; and receiving, according to the scheduling information, the uplink data sent by the terminal. This solves the problem of a reduced uplink data transmission efficiency due to a lack of a technology for reducing signaling overheads and improving an uplink transmission rate on an unlicensed frequency spectrum in the related art, thereby achieving effects of reducing the signaling overheads and improving the uplink transmission rate on the unlicensed frequency spectrum.

First claim

1 . A data scheduling method, comprising:
configuring scheduling information according to a predetermined scheduling mode of unlicensed uplink subframes, wherein the scheduling information is configured to instruct a terminal to transmit uplink data on an unlicensed frequency spectrum; and receiving the uplink data sent by the terminal according to the scheduling information,
wherein the method is performed by at least one processor.

2 . The method of claim 1 , before configuring the scheduling information according to the predetermined scheduling mode of the unlicensed uplink subframes, the method further comprising: determining the scheduling mode according to a preset condition, wherein the preset condition comprises at least one of: a ratio of a downlink load to an uplink load of an unlicensed carrier is lower than a predefined threshold; a number of downlink subframes is less than a number of uplink subframes in one Transmission Opportunity (TXOP); or the uplink data consecutively fails to be received for k times within a predetermined period of time T, wherein k is an integer.

3 . The method of claim 2 , wherein the scheduling mode comprises: scheduling at least one uplink data burst of the terminal each time, wherein each of the at least one uplink data burst comprises m consecutive uplink subframes, wherein m is a positive integer greater than or equal to 1.

4 . The method of claim 1 , wherein the scheduling information comprises: public scheduling information common to all scheduled subframes in one uplink data burst and private scheduling information of each of the all scheduled subframes in the one uplink data burst, wherein the private scheduling information comprises at least one of: a Listen-Before-Talk (LBT) type, a New Data Indicator (NDI), a Redundancy Version (RV) or a Hybrid Automatic Repeat Request (HARQ) process number.

5 . The method of claim 4 , wherein configuring scheduling information according to the predetermined scheduling mode of the unlicensed uplink subframes comprises at least one of:
in response to determining that each subframe in the one uplink data burst is scheduled to carry a new data packet, the scheduling information comprising a combination of scheduling parameters, wherein the combination of scheduling parameters comprises: the NDI, the RV and the HARQ process number; in response to determining that all subframes in the one uplink data burst are scheduled to carry retransmitted data packets and initially-transmitted data packets corresponding to the retransmitted data packets share a combination of scheduling parameters, the scheduling information comprising the combination of scheduling parameters, wherein the combination of scheduling parameters comprises: the NDI, the RV and the HARQ process number; or in response to determining that the one uplink data burst is scheduled to carry new data packets and retransmitted data packets, allocating multiple combinations of scheduling parameters to the new data packets and the retransmitted data packets, wherein the combinations of scheduling parameters comprise: the NDI, the RV and the HARQ process number.

6 . The method of claim 5 , wherein the allocating multiple combinations of scheduling parameters to the new data packets and the retransmitted data packets comprises at least one of:
allocating one of the combinations of scheduling parameters to the new data packet and allocating one of the combinations of scheduling parameters to the retransmitted data packet, wherein the one of the combinations of scheduling parameters comprises: the NDI, the RV and the HARQ process number; or allocating a respective one of the combinations of scheduling parameters to each one of the new data packets and the retransmitted data packets.

7 . (canceled)

8 . The method of claim 4 , before receiving the uplink data sent by the terminal according to the scheduling information, the method further comprising:
sending the scheduling information to the terminal, wherein sending the scheduling information to the terminal comprises at least one of:
carrying and sending the public scheduling information in the scheduling information through a downlink control channel; or carrying and sending, through a downlink data channel, at least one of: the private scheduling information, an LBT type, an LBT contention window, an LBT back-off indicator value, or a scheduled or transmitted burst length indicator, which are in the scheduling information.

9 . The method of claim 8 , wherein sending the scheduling information to the terminal further comprises at least one of:
carrying the scheduling information through control information corresponding to existing control information format and sending the scheduling information to the terminal through the control information corresponding to existing control information format; or carrying the scheduling information through control information scrambled by a specific Radio Network Temporary Identity (RNTI) or control information corresponding to a configured control information format or transmission mode, and sending the scheduling information to the terminal through the control information scrambled by the specific RNTI or the control information corresponding to the configured control information format or transmission mode.

10 . (canceled)

11 . The method of claim 4 , wherein scheduling information further comprises at least one of: the LBT type, an LBT contention window, an LBT back-off indicator value, a carrier indicator, a resource block indicator, a modulation and coding level, the HARQ process number, a scheduled or transmitted burst length indicator, or an uplink index.

12 . The method of claim 11 , wherein the LBT type comprises: a full bandwidth energy detection, LBT on a partial bandwidth of a sub-band to which a scheduled Physical Resource Block (PRB) belongs or LBT on a partial bandwidth of the scheduled PRB, a predefined pattern detection, not performing LBT, performing LBT for only once, or LBT of multiple detection with back-off.

13 . The method of claim 12 , wherein not performing LBT comprises at least one of:
in response to determining that last scheduled data of a UE is received in a subframe N and determining that the UE needs to schedule or transmit data in an uplink subframe N+1, instructing not performing LBT before the data is sent in the subframe N+1; in response to determining that scheduled data of another UE is received in the subframe N and determining that the UE needs to be scheduled in the uplink subframe N+1, instructing the UE not to perform LBT before sending the data in the subframe N+1; or in response to determining that downlink data is sent in the subframe N and determining that the UE needs to be scheduled in the uplink subframe N+1, instructing not performing LBT before the data is sent in the subframe N+1.

14 . The method of claim 12 , wherein instructing the LBT type comprises:
in response to determining that a first scheduled subframe is a first uplink subframe, instructing performing LBT on the full bandwidth; in response to determining that the first scheduled subframe is not the first uplink subframe, instructing performing LBT at a scheduled sub-band level or a scheduled RB level or performing LBT on the predefined pattern detection, wherein an LBT type of the predefined pattern detection comprises: performing enhanced energy detection on last one or two symbols, detecting a cell-specific PUSCH RE muting pattern sent by another UE, or detecting sounding reference signal (SRS) comb frequency domain resource reservation pattern identifier.

15 .

Assignees

• Zte Corp

Inventors

• Li Xincai
• Gou Wei
• Zhao Yajun
• Bi Feng

Classifications

• H04L1/1896

  ARQ related signaling · CPC title

• H04W72/1268 Primary

  of uplink data flows · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title