DEVICE AND METHOD FOR PERFORMING DEVICE-TO-DEVICE BROADCAST COMMUNICATION IN A WIRELESS NETWORK

• US 20170164382A1
• Filed: 03/16/2015
• Published: 06/08/2017
• Est. Priority Date: 03/21/2014
• Status: Abandoned Application

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Li, Dong, Xu, Yanli, Liu, Yong
• Application Number:
  US15/127,569
• Publication Number:
  US 20170164382A1
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

The present invention provides a device and method for performing device-to-device broadcast communication in a wireless communication network, wherein the method comprises the steps of: obtaining a row except a 1st row for device-to-device broadcast in a Walsh matrix; performing device-to-device broadcast based on a transmission pattern determined by the obtained row, wherein the transmission pattern is: performing the following operations based on each element in the row sequentially: when the element is a first value, performing broadcast transmission of a same data packet; when the element is a second value, performing broadcast reception. Compared with the prior art, the present invention overcomes semi-duplexing limitation and reduces in-band emission, thereby achieves a better system performance.

Claims

1. A method for performing device-to-device broadcast communication at a user equipment of a wireless communication network, the method comprising:

obtaining a row except a 1^st row for device-to-device broadcast in a Walsh matrix;

performing device-to-device broadcast based on a transmission pattern determined by the obtained row, wherein the transmission pattern is;

performing the following operations based on each element in the row sequentially;

when the element is a first value, performing broadcast transmission of a same data packet;

when the element is a second value, performing broadcast reception.

2. The method according to claim 1, wherein the obtaining a row except a 1^st row for device-to-device broadcast in a Walsh matrix comprises:

determining times required for repetitively broadcasting a data packet;

determining a Walsh matrix based on the repetitive times;

obtaining a row except the 1^st row for device-to-device broadcast in the Walsh matrix.

3. The method according to claim 1, wherein the obtaining a row except a 1^st row for device-to-device broadcast in a Walsh matrix comprises:

receiving indication information from a base station serving the user equipment, the indication information including an indication of a row except a 1^strow for device-to-device broadcast in a Walsh matrix;

obtaining a row except a 1^st row for device-to-device broadcast in a Walsh matrix based on the received indication information.

4. The method according to claim 1, wherein the obtaining a row except a 1^st row for device-to-device broadcast in a Walsh matrix comprises:

obtaining schedule information including a row for device-to-device broadcast in the Walsh matrix selected by other user equipment;

selecting a row except a 1^st row for device-to-device broadcast in the Walsh matrix based on the obtained schedule information.

5-9. -9. (canceled)

10. A user equipment for performing device-to-device broadcast communication in a wireless communication network, the equipment comprising:

a row first obtaining module configured to obtain a row except a 1^st row for device-to-device broadcast in a Walsh matrix;

a broadcasting module configured to perform device-to-device broadcast based on a transmission pattern determined by the obtained row, wherein the transmission pattern is;

performing the following operations based on each element in the row sequentially;

when the element is a first value, performing broadcast transmission of a same data packet;

when the element is a second value, performing broadcast reception.

11. The equipment according to claim 10, wherein the row first obtaining module comprises:

a repetitive times determining module configured to determine times required for repetitively broadcasting a data packet;

a matrix determining module configured to determine a Walsh matrix based on the repetitive times;

a row second obtaining module configured to obtain a row except the 1^st row for device-to-device broadcast in the Walsh matrix.

12. The equipment according to claim 10 or 11, wherein the row first obtaining module comprises:

an indication information receiving module configured to receive indication information from a base station serving the user equipment, the indication information including an indication of a row except a 1^st row for device-to-device broadcast in a Walsh matrix;

a row third obtaining module configured to obtain a row except a 1^st row for device-to-device broadcast in a Walsh matrix based on the received indication information.

13. The equipment according to claim 10, wherein the row first obtaining module comprises:

a schedule information first obtaining module configured to obtain schedule information including a row for device-to-device broadcast in the Walsh matrix selected by other user equipment;

a row fourth obtaining module configured to select a row except a 1^st row for device-to-device broadcast in the Walsh matrix based on the obtained schedule information.

14. The equipment according to claim 13, wherein the row first obtaining module further comprises:

a schedule information first broadcasting module configured to broadcast schedule information including the selected row;

a schedule information second obtaining module configured to obtain new schedule information including a row for device-to-device broadcast selected by other user equipment;

a determining module configured to determine whether the selected row can be used to perform device-to-device broadcast based on the obtained new schedule information;

a row re-obtaining module configured to, if the selected row cannot be used to perform device-to-device broadcast, then after a random time, re-obtain a row except a 1^st row for device-to-device broadcast in a Walsh matrix.

15. The equipment according to claim 13, wherein the equipment further comprises:

a row fifth obtaining module configured to obtain a row except a 1^st row for device-to-device broadcast of schedule information in a Walsh matrix;

a schedule information second broadcasting module configured to perform device-to-device broadcast of schedule information based on the obtained transmission pattern determined by the row for device-to-device broadcast of schedule information, wherein the transmission pattern is;

performing the following operations for each element in the row sequentially;

when the element is a first value, performing broadcast transmission of same schedule information;

when the element is a second value, performing broadcast reception of schedule information.

16. The apparatus according to claim 15, wherein the schedule information second broadcasting module comprises:

a scheduling period first determining module configured to determine one or more scheduling period;

a schedule information third broadcasting module configured to perform device-to-device schedule information broadcast based on a transmission pattern determined by the obtained row for device-to-device broadcast of schedule information, wherein the transmission pattern is;

performing the following operations based on each element in the row sequentially during the one or more scheduling periods;

when the element is a first value, performing broadcast transmission of same schedule information;

when the element is a second value, performing broadcast reception of schedule information.

17. The apparatus according to claim 16, wherein the schedule information third broadcasting module comprises:

a scheduling period second determining module configured to determine a plurality of scheduling periods;

a schedule information fourth broadcasting module configured to perform device-to-device broadcast of schedule information based on the obtained transmission pattern determined by the row for device-to-device broadcast of schedule information, wherein during each scheduling period, the following operations are performed for each element in the row sequentially;

when the element is a first value, performing broadcast transmission of same schedule information along with a scheduling period sequence number of the corresponding scheduling period;

when the element is a second value, performing broadcast reception of the schedule information.

18. The apparatus according to claim 14, wherein the schedule information comprises:

information of a transmission resource used for performing device-to-device broadcast communication.

19. A method for facilitating device-to-device broadcast communication at a base station of a wireless communication network, the method comprises:

determining, for a user equipment, a row except a 1^st row for the user equipment'"'"'s device-to-device broadcast in a Walsh matrix;

transmitting, to the user equipment, indication information for indicating a row except the 1^st row for the user equipment'"'"'s device-to-device broadcast in the Walsh matrix.

20. A base station facilitating device-to-device broadcast communication at a base station of a wireless communication network, the base station comprising:

a row determining module configured to determine, for a user equipment, a row except a 1^st row for the user equipment'"'"'s device-to-device broadcast in a Walsh matrix;

an indication information transmitting module configured to transmit, to the user equipment, indication information for indicating a row except the 1^st row for the user equipment'"'"'s device-to-device broadcast in the Walsh matrix.