Method and apparatus for reducing co-channel interference

• US 8,781,400 B2
• Filed: 06/30/2011
• Issued: 07/15/2014
• Est. Priority Date: 06/30/2011
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lindoff, Bengt, Simonsson, Arne, Hagerman, Bo, Parkvall, Stefan
• Primary Examiner(s): Dao, Minh D
• Application Number:
  US13/172,906
• Publication Number:
  US 20130005269A1
• Time in Patent Office: 1,111 Days
• Field of Search: 455/62, 455/63.1, 455/67.11, 455/179.1, 455/509, 455/166.1, 455/166.2, 455/150.1, 455/154.1, 370/329, 370/248, 370/341
• US Class Current: 455/62
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04J 11/0026 of multi-user interference
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/20 for optimising the interference level
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method for providing co-channel interference information by a network node includes receiving information for at least one user equipment (UE) connected to an adjacent network node, determining a co-channel interference list for user equipment (UE) connected to the network node wherein the co-channel interference list is based on the received information and transmitting the co-channel interference list to a UE connected to the network node.

Claims

1. A method of providing co-channel interference information by a network node, the method comprising:

receiving information for at least one user equipment (UE) connected to an adjacent network node;

determining a co-channel interference list for user equipment (UE) connected to the network node wherein the co-channel interference list is based on the received information; and

transmitting the co-channel interference list to a UE connected to the network node.

2. The method of claim 1, further comprising:

determining if the co-channel interference list has been updated; and

transmitting the co-channel interference list if it has been updated.

3. The method of claim 1, further comprising:

utilizing position information of a UE connected to the network node in determining the co-channel interference list.

4. The method of claim 1, wherein the received information is a radio network temporary identifier (RNTI).

5. The method of claim 1, further comprising:

receiving a reference signal received power (RSRP) value from a user equipment connected to the network node.

6. The method of claim 5, further comprising:

removing channels from the co-channel interference list for which the RSRP is below a pre-determined threshold.

7. The method of claim 1, wherein the co-channel interference list is transmitted via a radio resource control (RRC) signalling message.

8. The method of claim 1, wherein the co-channel interference list is transmitted via a media access control (MAC) signalling message.

9. The method of claim 1, wherein an identical co-channel interference list is transmitted to UEs connected to the network node.

10. The method of claim 1, wherein the co-channel interference list transmitted to UEs connected to the network node is specific to each receiving UE.

11. A network node comprising:

a receiving means for receiving information from an adjacent node wherein the received information relates to user equipment connected to the adjacent node;

a processor for determining a co-channel interference list based on the received information;

a memory for storing the received user equipment information and the co-channel interference list; and

a transmitting means for transmitting the co-channel interference list to a UE connected to the network node.

12. A computer program comprising computer readable program modules which when run on a network node causes the network node to:

receive information for at least one active user equipment (UE) connected to an adjacent network node;

determine a co-channel interference list for user equipment (UE) connected to the network node wherein the co-channel interference list is based on the received information; and

transmit the co-channel interference list to a UE connected to the network node.