Multi-stage segmented downlink control information with reduced overhead

Patent metadata

Field	Value
Publication number	US-2020229005-A1
Application number	US-202016830430-A
Country	US
Kind code	A1
Filing date	Mar 26, 2020
Priority date	May 4, 2017
Publication date	Jul 16, 2020
Grant date	—

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 system, comprising:
a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
determining that first downlink control information, used to configure a first data channel between a 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; and
in response to the determining, instructing the first base station device to transmit 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 system of claim 1 , wherein instructing further comprises:
instructing the first base station device to add cyclic redundancy check bits to the non-redundant portions based on the first downlink control information.

3 . The system of claim 1 , wherein the mobile device is a first mobile device, wherein the redundant downlink control information is first redundant downlink control information, 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:
instructing the first base station device to transmit 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 system of claim 3 , wherein the non-redundant portions are first non-redundant portions, and wherein the operations further comprise:
instructing the first base station device to transmit 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 system of claim 1 , wherein the redundant downlink control information comprises a common modulation and coding scheme.

6 . The system 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 system 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:
determining, by a system comprising a processor, that first downlink control information used to configure a first data channel between a 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; and in response to the determining, facilitating, by the system comprising a processor, a transmission by the first base station device of 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 , wherein the facilitating further comprises:
facilitating an addition by the first base station device of 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, wherein the redundant downlink control information is first redundant downlink control information, wherein the transmission is a first transmission, 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:
facilitating, by the system, a second transmission by the first base station device of 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 , wherein the non-redundant portions are first non-redundant portions, wherein the transmission is a first transmission, and wherein the operations further comprise:
facilitating, by the system, a second transmission by the first base station device of 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.

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 system, facilitate performance of operations, comprising:
determining that first downlink control information used to configure a first data channel between a 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; and in response to the determining, initiating the first base station device to transmit 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.

16 . The system of claim 15 , wherein the initiating further comprises:
initiating the first base station device to add cyclic redundancy check bits to the non-redundant portions based on the first downlink control information.

17 . The system of claim 15 , wherein the redundant downlink control information is first redundant downlink control information, wherein the mobile device is a first mobile device, and wherein the operations further compri

Assignees

• At & T Ip I Lp

Inventors

• Bendlin Ralf
• Wang Xiaoyi
• Nammi Sairamesh

Classifications

• H04W72/23

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

• H04L5/0053 Primary

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

• H04Q2213/13215

  Code checking, CRC · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04W28/065

  using assembly or disassembly of packets · CPC title