Data transmission method and device

• US 10,306,659 B2
• Filed: 12/19/2016
• Issued: 05/28/2019
• Est. Priority Date: 06/20/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Han, Guanglin, Xiong, Xin
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): Maglo, Emmanuel K
• Application Number:
  US15/383,551
• Publication Number:
  US 20170099674A1
• Time in Patent Office: 890 Days
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention relates to the communications field, and discloses a data transmission method and device, so as to resolve a problem of low efficiency and excessively much power consumption when user equipment performs blind detection on a scheduling control channel. A specific solution is: receiving, by a first device, scheduling control channel length information, performing, by the first device, blind detection in a preset search space according to the scheduling control channel length information, and after detecting a scheduling control channel corresponding to the scheduling control channel length information, obtaining, by the first device, resource allocation information carried on the scheduling control channel. The present invention is applied to data transmission.

Claims

1. A data transmission device, comprising:

a receiver, configured to receive scheduling control channel length information, wherein the scheduling control channel length information comprises a quantity of physical resource units occupied by a scheduling control channel, and the scheduling control channel is a control channel used when resource allocation information is sent to the data transmission device; and

a processor, configured to;

perform blind detection in a preset search space according to the scheduling control channel length information received by the receiver; and

after detecting the scheduling control channel corresponding to the scheduling control channel length information, obtain the resource allocation information carried on the scheduling control channel, wherein the preset search space is a search space used to carry the resource allocation information

wherein the receiver is further configured to;

receive preset search space configuration information, wherein the preset search space configuration information comprises location information of the preset search space, and the location information of the preset search space is used to indicate a time frequency resource occupied by the preset search space;

when the preset search space configuration information received by the receiver comprises category information of the preset search space and the category information of the preset search space indicates that the preset search space is a group dedicated search space, the preset search space configuration information further comprises;

identification information of a preset subframe, wherein the identification information of the preset subframe is used to indicate a subframe that carries the scheduling control channel; and

the processor is configured to perform, according to the identification information, received by the receiver, of the preset subframe, blind detection in the preset search space in the preset subframe according to the scheduling control channel length information.

2. A data transmission device, comprising:

a processor, configured to prepare instructions for each first device in a group to report a respective signal quality information;

a transmitter, configured to send the instructions to each first device to report the respective signal quality information;

wherein the processor is further configured to;

obtain the respective signal quality information reported by each first device in the group;

estimate a signal quality status in the group according to the respective signal quality information; and

determine a scheduling control channel length of a scheduling control channel in the group according to the respective signal quality status of the group; and

obtain scheduling control channel length information according to the scheduling control channel length, wherein the scheduling control channel length information comprises a quantity of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel used when resource allocation information is sent to a first device;

the transmitter is further configured to send the scheduling control channel length information obtained by the processor;

the processor is configured to perform configuration on a length of the scheduling control channel according to the obtained scheduling control channel length information; and

the transmitter is configured to send the scheduling control channel to at least one first device in the group after the processing unit completes length configuration of the scheduling control channel.

3. The device according to claim 2, wherein the transmitter is further configured to:

send preset search space configuration information, wherein the preset search space configuration information comprises location information of a preset search space, and the location information of the preset search space is used to indicate a time frequency resource occupied by the preset search space.

4. The device according to claim 3, wherein the preset search space configuration information sent by the transmitter further comprises:

category information of the preset search space, wherein the category information of the preset search space is used to indicate a category of the preset search space; and

the category of the preset search space comprises;

a public search space, a dedicated search space, or a group dedicated search space.

5. The device according to claim 2, wherein the scheduling control channel length information obtained by the processor is one of the following:

a quantity of subcarriers occupied by the scheduling control channel;

a quantity of physical symbols occupied by the scheduling control channel;

or

a scheduling control channel length corresponding to the scheduling control channel.

6. A data transmission method, comprising:

receiving, by a first device, scheduling control channel length information, wherein the scheduling control channel length information comprises a quantity of physical resource units occupied by a scheduling control channel, and the scheduling control channel is a control channel used when resource allocation information is sent to the first device;

performing, by the first device, blind detection in a preset search space according to the scheduling control channel length information; and

after detecting the scheduling control channel corresponding to the scheduling control channel length information, obtaining, by the first device, the resource allocation information carried on the scheduling control channel, wherein the preset search space is a search space used to carry the resource allocation information; and

wherein before receiving, by the first device, the scheduling control channel length information, the method further comprises;

receiving, by the first device, preset search space configuration information, wherein the preset search space configuration information comprises location information of the preset search space, and the location information of the preset search space is used to indicate a time frequency resource occupied by the preset search space;

wherein when the preset search space configuration information received by the first device comprises category information of the preset search space and the category information of the preset search space indicates that the preset search space is a group dedicated search space, the preset search space configuration information further comprises;

identification information of a preset subframe, wherein the identification information of the preset subframe is used to indicate a subframe that carries the scheduling control channel; and

performing, by the first device, blind detection in the preset search space according to the scheduling control channel length information comprises;

performing, by the first device, according to the identification information of the preset subframe, blind detection in the preset search space in the preset subframe according to the scheduling control channel length information.

7. A data transmission method, the method comprising:

instructing, by a second device, each first device in a group to report respective signal quality information;

obtaining, by the second device, the respective signal quality information reported by each first device in the group;

estimating, by the second device, a signal quality status in the group according to the respective signal quality information;

determining, by the second device, a scheduling control channel length of a scheduling control channel in the group according to the signal quality status in the group;

generating, by the second device, scheduling control channel length information after determining the scheduling control channel length;

sending, by a second device, scheduling control channel length information, wherein the scheduling control channel length information comprises a quantity of physical resource units occupied by the scheduling control channel, and the scheduling control channel is a control channel used when resource allocation information is sent to a first device; and

sending, by the second device, the scheduling control channel to at least one first device in the group according to the scheduling control channel length information.

8. The method according to claim 7,

wherein before sending, by the second device, the scheduling control channel length information, the method further comprises:

sending, by the second device, preset search space configuration information, wherein the preset search space configuration information comprises location information of a preset search space, and the location information of the preset search space is used to indicate a time frequency resource occupied by the preset search space.

9. The method according to claim 8, wherein the preset search space configuration information further comprises:

category information of the preset search space, wherein the category information of the preset search space is used to indicate a category of the preset search space; and

the category of the preset search space comprises;

a public search space, a dedicated search space, or a group dedicated search space.

10. The method according to claim 7, wherein the scheduling control channel length information is one of the following:

a quantity of subcarriers occupied by the scheduling control channel;

a quantity of physical symbols occupied by the scheduling control channel;

or

a scheduling control channel length corresponding to the scheduling control channel.