Method for UE Pattern Indication and Measurement for Interference Coordination

• US 20150334731A1
• Filed: 06/29/2015
• Published: 11/19/2015
• Est. Priority Date: 11/08/2010
• Status: Abandoned Application

• Current Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Original Assignee: MediaTek, Inc.
• Inventors: Chen, Yih-Shen, Johansson, Per Johan Mikael
• Application Number:
  US14/753,699
• Publication Number:
  US 20150334731A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/0094 Definition of hand-off measurement parameters
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A method of inter-cell interference coordination is provided for UE measurements and network access procedure. In a first embodiment, a UE in idle mode performs measurements on received radio signals applying a simplified radio resource restriction for interference coordination. The UE determines the restricted radio resource without receiving explicit measurement configuration. In a second embodiment, during various phases of a network access procedure, the UE indicates its interference status and/or additional interference information to its serving base station to enhance interference coordination. In a third embodiment, the UE in connected mode performs measurements on both interference-protected transmission resources and non-interference-protected transmission resources. The UE measurement results are used for scheduling, radio link monitoring, and/or mobility management to increase radio spectrum efficiency and to improve user experience.

Claims

1. A method, comprising:

detecting a strong interfering cell by a user equipment (UE) in a wireless communication system, wherein the interfering cell is non-accessible to the UE;

performing a network access procedure with a base station; and

indicating interference coordination information to the base station during the network access procedure.

2. The method of claim 1, wherein the network access procedure comprises:

transmitting a RACH preamble over a RACH resource, wherein the RACH preamble belongs to a RACH preamble group dedicated for strongly interfered UEs.

3. The method of claim 1, wherein the network access procedure comprises:

transmitting a RACH preamble over a RACH resource, wherein the RACH resource belongs to a RACH resource group dedicated for strongly interfered UEs.

4. The method of claim 1, wherein the network access procedure comprises:

transmitting a connection request message to the base station after receiving an uplink grant, wherein the connection request message contains an indicator indicating that the UE is strongly interfered.

5. The method of claim 1, wherein the network access procedure comprises:

transmitting a connection request message to the base station after receiving an uplink grant, wherein the connection request message contains interference-protected resource pattern of the interfering cell.

6. The method of claim 1, wherein the network access procedure comprises:

transmitting a connection setup complete message to the base station after receiving a connection setup message, wherein the connection setup complete message contains interference-protected resource pattern of the interfering cell.

7. The method of claim 1, further comprising:

performing measurement on configured measurement object after establishing a connection with the base station; and

transmitting a measurement report to the base station, wherein the measurement report comprises the interference coordination information.

8. The method of claim 7, wherein the UE decodes a broadcast channel of the interfering cell, and wherein the interference coordination information comprises a cell ID and/or an interference-protected resource pattern of the interfering cell.

9. A User Equipment (UE), comprising:

a processor that enables the UE to detect a strong interfering cell in a wireless communication system, wherein the interfering cell is non-accessible to the UE, and wherein the UE also performs a network access procedure with a base station; and

memory that stores interference coordination information to be indicated to the base station during the network access procedure.

10. The UE of claim 9, further comprising:

a transmitter that transmits a RACH preamble over a RACH resource, wherein the RACH preamble belongs to a RACH preamble group dedicated for strongly interfered UEs.

11. The UE of claim 9, further comprising:

a transmitter that transmits a RACH preamble over a RACH resource, wherein the RACH resource belongs to a RACH resource group dedicated for strongly interfered UEs.

12. The UE of claim 9, further comprising:

a transmitter that transmits a connection request message to the base station after receiving an uplink grant, wherein the connection request message contains an indicator indicating that the UE is strongly interfered.

13. The UE of claim 9, further comprising:

a transmitter that transmits a connection request message to the base station after receiving an uplink grant, wherein the connection request message contains interference-protected resource pattern of the interfering cell.

14. The UE of claim 9, further comprising:

a transmitter that transmits a connection setup complete message to the base station after receiving a connection setup message, wherein the connection setup complete message contains interference-protected resource pattern of the interfering cell.

15. The UE of claim 9, further comprising:

a measurement module that performs measurement on configured measurement object after establishing a connection with the base station; and

a transmitter that transmits a measurement report to the base station, wherein the measurement report comprises the interference coordination information.

16. The UE of claim 15, wherein the UE decodes a broadcast channel of the interfering cell, and wherein the interference coordination information comprises a cell ID and/or an interference-protected resource pattern of the interfering cell.