Apparatus and method for channel measurement in radio link monitoring in a wireless network

1. For use in a wireless communication network, a subscriber station configured to perform a channel measurement on a communication channel, the subscriber station comprising:

a receiver configured to receive signals from a base station; and

processing circuitry, wherein when the receiver receives higher layer signaling indicating that channel quality measurement is to be performed in restricted sub-frames for measurement (RSFM), the processing circuitry is configured to extend an evaluation period for monitoring a quality of the communication channel, wherein the extended evaluation period is determined based at least in part on a number of the RSFM.

2. The subscriber station as set forth in claim 1 , wherein the extended evaluation period is a function of the RSFM.

3. The subscriber station as set forth in claim 2 , wherein the extended evaluation period is adjusted by a coefficient.

4. The subscriber station as set forth in claim 1 , wherein the extended evaluation period comprises at least one of: a first extended evaluation period for an out-of-sync evaluation period (Qout) and a second evaluation period for an in-sync evaluation period (Qin).

5. The subscriber station as set forth in claim 1 , wherein the extended evaluation period is based on an extension ratio (γ) and at least one of at Table A and a Table B, wherein Table A is:

T Evaluate — Q out _DRX and T Evaluate — Q in _DRX

DRX cycle length (s)

(s) (DRX cycles)

≦0.04

[Note (20γ)]

0.08

[0.8γ (10γ)]

0.16

[1.6γ (10γ)]

0.32

[3.2γ (10γ)]

0.64

[6.4γ (10γ)]

1.28

[6.4γ (5γ)] 

2.56

[12.8γ (5γ)] 

and wherein Table B is:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

Note (20 γ)

0.04 < DRX cycle ≦ 0.64

Note (10 γ)

0.64 < DRX cycle ≦ 2.56

Note (5 γ)

and wherein an evaluation period length in time depends on a length of a DRX cycle in use.

6. The subscriber station as set forth in claim 1 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio (γ) is based on at least one of at Table A.1 and a Table A.2, wherein Table A.1 is:

A

Γ

  0~0.2

8

0.2~0.4

6

0.4~0.6

4

0.6~0.8

2

0.8~1.0

1

and wherein Table A.2 is:

Higher-layer signaling

indicates certain sub-frames

for restricted radio link

monitoring

γ

Yes

2

No

1.

7. The subscriber station as set forth in claim 1 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio is different for different cycles.

8. The subscriber station as set forth in claim 7 , the extended evaluation period is based on:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

(20γ 1 )

0.04 < DRX cycle ≦ 0.64

(10γ 2 )

0.64 < DRX cycle ≦ 2.56

 (5γ 3 )

and wherein an evaluation period length in time depends on a length of the DRX cycle in use.

9. A wireless communication network comprising:

a subscriber station configured to perform a channel measurement on a communication channel, the subscriber station comprising:

a receiver configured to receive signals from a base station; and

processing circuitry, wherein when the receiver receives higher layer signaling indicating that channel quality measurement is to be performed in restricted sub-frames for measurement (RSFM), the processing circuitry is configured to extend an evaluation period for monitoring a quality of the communication channel, wherein the extended evaluation period is determined based at least in part on a number of the RSFM.

10. The wireless communication network as set forth in claim 9 , wherein the extended evaluation period is a function of the RSFM.

11. The wireless communication network as set forth in claim 10 , wherein the extended evaluation period is adjusted by a coefficient.

12. The wireless communication network as set forth in claim 9 , wherein the extended evaluation period comprises at least one of a first extended evaluation period for an out-of-sync evaluation period (Qout) and a second evaluation period for an in-sync evaluation period (Qin).

13. The wireless communication network as set forth in claim 9 , wherein the extended evaluation period is based on an extension ratio (γ) and at least one of at Table A and a Table B, wherein Table A is:

T Evaluate — Q out _DRX and T Evaluate — Q in _DRX

DRX cycle length (s)

(s) (DRX cycles)

≦0.04

[Note (20γ)]

0.08

[0.8γ (10γ)]

0.16

[1.6γ (10γ)]

0.32

[3.2γ (10γ)]

0.64

[6.4γ (10γ)]

1.28

[6.4γ (5γ)] 

2.56

[12.8γ (5γ)] 

and wherein Table B is:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

Note (20 γ)

0.04 < DRX cycle ≦ 0.64

Note (10 γ)

0.64 < DRX cycle ≦ 2.56

Note (5 γ)

and wherein an evaluation period length in time depends on a length of a DRX cycle in use.

14. The wireless communication network as set forth in claim 9 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio (γ) is based on at least one of at Table A.1 and a Table A.2, wherein Table A.1 is:

α

γ

  0~0.2

8

0.2~0.4

6

0.4~0.6

4

0.6~0.8

2

0.8~1.0

1

and wherein Table A.2 is:

Higher-layer signaling

indicates certain sub-frames

for restricted radio link

monitoring

γ

Yes

2

No

1.

15. The wireless communication network as set forth in claim 9 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio is different for different cycles.

16. The wireless communication network as set forth in claim 9 , the extended evaluation period is based on:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

(20γ 1 )

0.04 < DRX cycle ≦ 0.64

(10γ 2 )

0.64 < DRX cycle ≦ 2.56

 (5γ 3 )

and wherein an evaluation period length in time depends on a length of the DRX cycle in use.

17. For use in a wireless communication network, a method for performing a channel measurement on a communication channel, the method comprising:

receiving a plurality of signals from a base station; and

after receiving higher layer signaling indicating that channel quality measurement is to be performed in restricted sub-frames for measurement (RSFM), extending an evaluation period for monitoring a quality of the communication channel, wherein the extended evaluation period is determined based at least in part on a number of the RSFM.

18. The method as set forth in claim 17 , wherein the extended evaluation period is a function of the RSFM.

19. The method as set forth in claim 18 , wherein extending the evaluation period comprises adjusting the evaluation period by a coefficient.

20. The method as set forth in claim 17 , wherein the extended evaluation period comprises at least one of: a first extended evaluation period for an out-of-sync evaluation period (Qout) and a second evaluation period for an in-sync evaluation period (Qin).

21. The method as set forth in claim 17 , wherein the extended evaluation period is based on an extension ratio (γ) and at least one of at Table A and a Table B, wherein Table A is:

T Evaluate — Q out _DRX and T Evaluate — Q in _DRX

DRX cycle length (s)

(s) (DRX cycles)

≦0.04

[Note (20γ)]

0.08

[0.8γ (10γ)]

0.16

[1.6γ (10γ)]

0.32

[3.2γ (10γ)]

0.64

[6.4γ (10γ)]

1.28

[6.4γ (5γ)] 

2.56

[12.8γ (5γ)] 

and wherein Table B is:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

Note (20 γ)

0.04 < DRX cycle ≦ 0.64

Note (10 γ)

0.64 < DRX cycle ≦ 2.56

Note (5 γ)

and wherein an evaluation period length in time depends on a length of a DRX cycle in use.

22. The method as set forth in claim 17 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio (γ) is based on at least one of at Table A.1 and a Table A.2, wherein Table A.1 is:

α

γ

  0~0.2

8

0.2~0.4

6

0.4~0.6

4

0.6~0.8

2

0.8~1.0

1

and wherein Table A.2 is:

Higher-layer signaling

indicates certain sub-frames

for restricted radio link

monitoring

γ

Yes

2

No

1.

23. The method as set forth in claim 17 , wherein the extended evaluation period is based on an extension ratio (γ), wherein the extension ratio is different for different cycles.

24. The method as set forth in claim 17 , the extended evaluation period is based on:

T Evaluate — Q out _DRX and

DRX cycle length (s)

T Evaluate — Q in _DRX (s) (DRX cycles)

≦0.04

(20γ 1 )

0.04 < DRX cycle ≦ 0.64

(10γ 2 )

0.64 < DRX cycle ≦ 2.56

 (5γ 3 )

and wherein an evaluation period length in time depends on a length of the DRX cycle in use.