Apparatus and method for neighbor assisted combining for multicast services

• US 7,315,523 B2
• Filed: 10/12/2005
• Issued: 01/01/2008
• Est. Priority Date: 10/12/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Cai, Zhijun, Harrison, Robert M., Ahmed, Mansoor
• Primary Examiner(s): Nguyen; Lee
• Application Number:
  US11/248,313
• Publication Number:
  US 20070081480A1
• Time in Patent Office: 811 Days
• Field of Search: 370/312, 370/270, 455/503
• US Class Current: 370/312
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00

Abstract

A method and apparatus for neighbor assisted combining for localized multicast services. User equipment is sent a signal indicating the relationship between cells with respect to serving cells transmitting a common multicast transmission. At least a portion of the common multicast transmission is transmitted on the same resource on each serving cell. A pilot signal is transmitted on each serving cell, the pilot signal related to the at least a portion of the common multicast transmission on each serving cell. An interfering signal and a related pilot are transmitted on at least one different cell from the serving cells.

Claims

1. A method in a wireless network, the method comprising:

signaling to user equipment a signal indicating the relationship between at least one cell with respect to at least one serving cell transmitting a common multicast transmission;

transmitting at least a portion of the common multicast transmission on the same resource on the at least one serving cell; and

transmitting a pilot signal on the at least one serving cell, the pilot signal related to the at least a portion of the common multicast transmission on the at least one serving cell;

wherein a cell different from the at least one serving cell transmits an interfering signal and a related pilot.

2. The method according to claim 1, wherein the signal is selected from the group of a signal indicating which cells are serving cells transmitting a common multicast transmission and a signal indicating the identity of a cell that is transmitting on the same resource as the serving cells.

3. The method according to claim 2, wherein the pilot transmitted on the at least one serving cell is a phase reference for the common multicast transmission, and is the same signal transmitted on multiple serving cells.

4. The method according to claim 2, wherein the common multicast transmission is transmitted on the serving cells using the same physical layer attributes on the at least one serving cell.

5. The method according to claim 4, wherein the same physical layer attributes comprises at least one selected from the group of the same spreading, the same channel coding, the same error detection coding, the same time frequency resources, and the same frequency hopping pattern.

6. The method according to claim 2, further comprising signaling to a transmitting base station an indicator indicating not to transmit on a resource on a non-serving cell.

7. The method according to claim 2, further comprising signaling to user equipment the identity of a cell that does not transmit on the same resource as the serving cells.

8. The method according to claim 2, wherein the same resource on the at least one serving cell comprises at least resource one selected from the group of the same slot, the same frequency, the same period, and the same spreading codes, on the at least one serving cell.

9. The method according to claim 2, wherein the common multicast transmission is determined from a single information stream for broadcast to multiple users at multiple locations.

10. A method in a wireless device, the method comprising:

receiving information regarding serving cells that are transmitting a common multicast transmission;

receiving the common multicast transmission, at least a portion of which is transmitted on the same resource element on multiple serving cells;

receiving a common broadcast pilot signal related to the common multicast transmission, the common broadcast pilot signal being common to multiple cells;

decoding the common multicast transmission; and

receiving an interfering signal and a related pilot from a different cell from the serving cells.

11. The method according to claim 10, further comprising adapting a receiver in response to receiving the information regarding the serving cells.

12. The method according to claim 10, further comprising presenting the common multicast transmission to a user of the wireless device via a user interface.

13. The method according to claim 10, further comprising attenuating the interfering signal by adapting the receiver to attenuate interference using the information regarding serving cells and the common broadcast pilot signal and the pilot related to the interfering signal.

14. A network controller comprising:

a processor configured to control the operations of the network controller;

a serving cell signaling module coupled to the processor configured to signal to user equipment a signal indicating the relationship between cells with respect to serving cells transmitting a common multicast transmission; and

a network connection coupled to the processor the network connection configured to send a signal for transmitting at least a portion of the common multicast transmission on the same resource element on each serving cell, the network connection configured to send a signal for transmitting a pilot signal on each serving cell, the pilot signal related to the at least a portion of the common multicast transmission on each serving cell, the network connection configured to send a signal for transmitting an interfering signal and a related pilot on at least one different cell from the serving cells.

15. The network controller according to claim 14, wherein the pilot transmitted on at least one serving cell is a phase reference for the common multicast transmission, and is the same signal transmitted on multiple serving cells.

16. The network controller according to claim 14, wherein the signal indicating the relationship between cells indicates which cells are serving cells transmitting a common multicast transmission.

17. The network controller according to claim 14, wherein the signal indicating the relationship between cells indicates the identity of a cell that is transmitting on the same resource as the serving cells.

18. The network controller according to claim 14, wherein the signal indicating the relationship between cells indicates the identity of a cell that does not transmit on the same resource as the serving cells.