Wireless user equipment for use in reducing cross cell interference

• US 9,819,472 B2
• Filed: 11/24/2014
• Issued: 11/14/2017
• Est. Priority Date: 08/17/2001
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Pan, Kyle Jung-Lin
• Primary Examiner(s): TANG, KIET G
• Application Number:
  US14/551,735
• Publication Number:
  US 20150078315A1
• Time in Patent Office: 1,086 Days
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 7/2618 using hybrid code-time division multiple access [CDMA-TDMA]
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for reducing cross cell interference in a wireless time division duplex communication system using code division multiple access, the system having at least one user equipment (UE) and a base station (BS) is disclosed. The method begins by measuring an interference level of each timeslot at the BS. A timeslot is eliminated for additional uplink communication if the measured interference level exceeds a first threshold. UEs in nearby cells that are large interferers are identified and their downlink timeslot usage is gathered. A timeslot is eliminated for uplink communication for a large interferer UE that uses the timeslot for downlink communication.

Claims

1. A method for use by a base station, the method comprising:

receiving, from a neighboring base station, an indication for each of a plurality of resources, wherein each indication indicates an interference level experienced by the neighboring base station, wherein the interference level is a first, second, or third level;

determining, based on the received indications, an allocation of resources for each of a plurality of user equipments (UEs); and

transmitting a wireless signal including the allocation of resources to each of the plurality of UEs.

2. The method of claim 1, wherein the interference level is determined using a threshold test.

5. The method of claim 1, wherein the allocation of resources indicates at least one time slot.

6. The method of claim 1, wherein the allocation of resources includes downlink resources.

7. The method of claim 1, wherein the allocation of resources includes uplink resources.

8. The method of claim 1, wherein the first, second, or third level correspond to a high, medium, or low interference level respectively.

3. A base station, the base station comprising:

a receiver configured to receive from a neighboring base station an indication for each of a plurality of resources, wherein each indication indicates an interference level experienced by the neighboring base station, wherein the interference level is a first, second, or third level;

a processor configured to determine, based on the received indications, an allocation of resources for each of a plurality of user equipments (UEs); and

a transmitter configured to transmit a wireless signal including the allocation of resources to each of the plurality of UEs.

4. The base station of claim 3, wherein the interference level is determined using a threshold test.

9. The base station of claim 3, wherein the allocation of resources indicates at least one time slot.

10. The base station of claim 3, wherein the allocation of resources includes downlink resources.

11. The base station of claim 3, wherein the allocation of resources includes uplink resources.

12. The base station of claim 3, wherein the first, second, or third level correspond to a high, medium, or low interference level respectively.