Multi-stage segmented downlink control information with reduced overhead

Patent metadata

Field	Value
Publication number	US-10638337-B2
Application number	US-201916354496-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	May 4, 2017
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

Various embodiments disclosed herein provide for multi-stage segmentation of downlink control information. Downlink control information can arrive at a user equipment on more than one channel, setting up and configuring data channels for different base stations, or data channels for the same base station but where the data channels are in different frequency domains or time domains. The downlink control information segmentation system disclosed herein can determine when downlink control information for the user equipment is common across a plurality of downlink control channels, and ensure that the downlink control information is sent just one time, to avoid redundant data transmissions and increased overhead.

First claim

What is claimed is:

1. A first base station device, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
in response to determining that first downlink control information used to configure a first data channel between the first base station device and a mobile device and second downlink control information used to configure a second data channel between a second base station device and the mobile device comprise redundant downlink control information, and that the redundant downlink control information has been transmitted by the second base station to the mobile device via a second downlink control channel:
transmitting non-redundant portions of the first downlink control information to the mobile device via a first downlink control channel between the first base station device and the mobile device.

2. The first base station device of claim 1 , wherein the operations further comprise:
adding cyclic redundancy check bits to the non-redundant portions based on the first downlink control information.

3. The first base station device of claim 1 , wherein the mobile device is a first mobile device, and wherein the operations further comprise:
in response to determining that third downlink control information used to configure a third data channel between the first base station device and a second mobile device and fourth downlink control information used to configure a fourth data channel between the first base station device and a third mobile device comprise second redundant downlink control information:
transmitting the third downlink control information to the second mobile device via a third downlink control channel between the first base station device and the second mobile device.

4. The first base station device of claim 3 , wherein the operations further comprise:
transmitting second non-redundant portions of the fourth downlink control information to the third mobile device via a fourth downlink control channel between the first base station device and the third mobile device.

5. The first base station device of claim 1 , wherein the redundant downlink control information comprises a common modulation and coding scheme (MCS).

6. The first base station device of claim 1 , wherein the first downlink control channel is associated with a first frequency domain, and the second downlink control channel is associated with a second frequency domain different from the first frequency domain.

7. The first base station device of claim 1 , wherein the first downlink control channel is associated with a first time interval, and the second downlink control channel is associated with a second time interval different from the first time interval.

8. A method, comprising:
in response to determining, by a first base station device comprising a processor, that first downlink control information used to configure a first data channel between the first base station device and a mobile device and second downlink control information used to configure a second data channel between a second base station device and the mobile device comprise redundant downlink control information, and that the redundant downlink control information has been transmitted by the second base station device to the mobile device via a second downlink control channel:
transmitting, by the first base station device, non-redundant portions of the first downlink control information to the mobile device via a first downlink control channel between the first base station device and the mobile device.

9. The method of claim 8 , further comprising:
adding, by the first base station device, cyclic redundancy check bits to the non-redundant portions based on the first downlink control information.

10. The method of claim 8 , wherein the mobile device is a first mobile device, and further comprising:
in response to determining that third downlink control information used to configure a third data channel between the first base station device and a second mobile device and fourth downlink control information used to configure a fourth data channel between the first base station device and a third mobile device comprise second redundant downlink control information:
transmitting, by the first base station device, the third downlink control information to the second mobile device via a third downlink control channel between the first base station device and the second mobile device.

11. The method of claim 10 , further comprising:
transmitting, by the first base station device, second non-redundant portions of the fourth downlink control information to the third mobile device via a fourth downlink control channel between the first base station device and the third mobile device.

12. The method of claim 8 , wherein the redundant downlink control information comprises a common modulation and coding scheme (MCS).

13. The method of claim 8 , wherein the first downlink control channel is associated with a first frequency domain, and the second downlink control channel is associated with a second frequency domain different from the first frequency domain.

14. The method of claim 8 , wherein the first downlink control channel is associated with a first time interval, and the second downlink control channel is associated with a second time interval different from the first time interval.

15. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a first base station device, facilitate performance of operations, comprising:
in response to determining that first downlink control data used to configure a first data channel between the first base station device and a mobile device and second downlink control data used to configure a second data channel between a second base station device and the mobile device comprise redundant downlink control data, and that the redundant downlink control information has been transmitted by the second base station to the mobile device via a second downlink control channel:
transmitting non-redundant portions of the first downlink control data to the mobile device via a first downlink control channel between the first base station device and the mobile device.

16. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise:
adding cyclic redundancy check bits to the non-redundant portions based on the first downlink control data.

17. The non-transitory machine-readable medium of claim 15 , wherein the mobile device is a first mobile device, and wherein the operations further comprise:
in response to determining that third downlink control data used to configure a third data channel between the first base station device and a second mobile device and fourth downlink control data used to configure a fourth data channel between the first base station device and a third mobile device comprise second redundant downlink control data:
transmitting the third downlink control data to the second mobile device via a third downlink control channel between the first base station device and the second mobile device.

18. The non-transitory machine-readable medium of claim 17 , wherein the operations further comprise:
transmitting second non-redundant portions of the fourth downlink control data to the third mobile device via a fourth downlink control channel between the first base station device and the third mobile device.

19. The non-transitory machine-r

Assignees

• At & T Ip I Lp

Inventors

• Bendlin Ralf
• Wang Xiaoyi
• Nammi Sairamesh

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W72/0446

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

• H04W28/065

  using assembly or disassembly of packets · CPC title