A method and apparatus for selecting carriers

Abstract

This invention relates to a method and apparatus for selecting carriers to be measured by a sibscriber unit (301 303 501). The subscriber unit (301 303 501) is served by a communication system and is operable to measure carriers in a frequency band which typically belongs to a different communication system. The appratus comprises a performance processor (329) for determining a measuring performance characteristic of the subscriber unit (301 303 501) related to the measurement performance of the subscriber unit (301 303 501) when measuring in the frequency band. The apparatus furthermore comprises a carrier subset selector (331) for selecting a subset of carriers in the frequency band to be measured by the subscriber unit. The subset of carriers is selected dependent on the measuring performance characteristic. The invention is applicable to dual 2nd and 3rd generation cellular communication systems such as GSM/UMTS.

This invention relates to a method and apparatus for selecting carriers to be measured by a sibscriber unit (301303 501). The subscriber unit (301 303 501) is served by a communication system and is operable to measure carriers in a frequency band which typically belongs to a different communication system. The appratus comprises a performance processor (329) for determining a measuring performance characteristic of the subscriber unit (301 303 501) related to the measurement performance of the subscriber unit (301 303 501) when measuring in the frequency band. The apparatus furthermore comprises a carrier subset selector (331) for selecting a subset of carriers in the frequency band to be measured by the subscriber unit. The subset of carriers is selected dependent on the measuring performance characteristic. The invention is applicable to dual 2nd and 3rd generation cellular communication systems such as GSM/UMTS.

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Patent Type

Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type
Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number				Explicitly Disclosed	Patent Type
4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: Illustrative part: ---- Release: S2 TS Number: TS 136 214 Version No: Illustrative part: ---- Release: S3 TS Number: TS 136 300 Version No: Illustrative part: ---- Release: +2 -2				No	Family Member

Specification Information

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Version Number

Section Number

Specification Information

Spec Number

Version Number

Section Number

Technologies

2G 3G 4G 5G

Family Information

All Granted Patents In Patent Family :	----
All Pending Patents In Patent Family :	----

SEP Database Augmented SEP Database

Explicitly Disclosed

Patent Type

Publication No	Technology	Declaration Information			Specification Information	Explicitly Disclosed	Patent Type
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Number	Explicitly Disclosed	Patent Type
US2005075074A1	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	Yes	Basis Patent
US7120437B2	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	Yes	Basis Patent
GB2385745A	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	Yes	Family Member
GB2385745B	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	Yes	Family Member
CN100581299C	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	No	Family Member
CN1640174A	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	No	Family Member
AU2003247317A1	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	No	Family Member
WO03071824A1	4G	16/12/2010	ISLD-201101-007	MOTOROLA INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 214 Version No: ---- Section No: Release : ---- S3 TS Number: TS 136 300 Version No: ---- Section No: Release : ---- +2 -2	No	Family Member

Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
Publication No	Technology	Declaration Date	Declaration Reference	Declaring Company	Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
-----	-----	-----	-----	-----	S1 TS Number: ----- Version No: ----- Section No:----- Release:----- + -				-----	-----	-----	-----

Technologies

Measurement

Product

Not Available

Use Cases

Wireless communication

Services

Not Available

Claim

1. A method of selecting carriers to be measured by a subscriber unit served by a cellular communication system and operable to measure carriers in a frequency band, the method comprising the steps of determining a measuring performance characteristic of the subscriber unit related to the measurement performance of the subscriber unit when measuring carriers in the frequency band; and selecting a subset of carriers in the frequency band to be measured by the subscriber unit in response to the measuring performance characteristic.

2. A method of selecting carriers as claimed in claim 1 further comprising the step of transmitting identification of the subset of carriers to the subscriber unit.

3. A method of selecting carriers as claimed in claim 1 or 2 further comprising the step of the subscriber unit measuring the carriers of the subset of carriers.

4. A method of selecting carriers as claimed in any of the claims 1 to 3 wherein the measuring performance characteristic is indicative of the time required for the subscriber unit to measure earners in the frequency band.

5. A method of selecting earners as claimed in any of the claims 1 to 4 wherein the measuring performance characteristic is indicative of the number of receivers in the subscriber unit.

6. A method of selecting carriers as claimed in any of the claims 1 to 5 wherein the frequency band is a frequency band of a second communication system.

7. A method of selecting carriers as claimed in any of the claims 1 to 6 wherein the cellular communication system and the second communication system use different radio access technologies.

8. A method of selecting earners as claimed in claim 7 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

9. A method of selecting earners as claimed in claim 7 wherein the cellular communication system is a UMTS communication system and the second communication system is a GSM communication system

10. A method of selecting carriers as claimed in any of the claims 8 or 9 wherein the measuring performance characteristic is determined from a subscriber unit capability report indicating if compressed mode is required to perform measurements on the GSM communication system

11. A method of selecting carriers as claimed in any of the claims 1 to 10 wherein the size of the subset of carriers is dependent on the performance characteristic

12. A method of selecting earners as claimed in any of the claims 1 to 11 wherein the subset of carriers is an ordered subset of carriers and the order of carriers in the subset of carriers is dependent on the performance characteristic

13. A method of selecting carriers as claimed in any of the claims 1 to 12 further comprising the step of determining a handover candidate canier from the subset of carriers

14. A method of selecting carriers as claimed in any of the claims 1 to 13 wherein the measuring performance characteristic is determined from the number of measurement reports reported from the subscriber unit within a given time interval

15. An apparatus for selecting carriers to be measured by a subscriber unit served by a cellular communication system and operable to measure carriers in a frequency band, the method comprising: means for determining a measuring performance characteristic of the subscriber unit related to the measurement performance of the subscriber unit when measuring carriers in the frequency band; and means for selecting a subset of carriers in the frequency band to be measured by the subscriber unit in response to the measuring performance characteristic

16. An apparatus as claimed in claim 15 further comprising means for transmitting identification of the subset of carriers to the subscriber unit

17. An apparatus as claimed in any of the claims 15 to 16 wherein the measuring performance characteristic is indicative of the time required for the subscriber unit to measure carriers in the frequency band

18. An apparatus as claimed in any of the claims 15 to 17 wherein the measuring performance characteristic is indicative of the number of receivers in the subscriber unit

19. An apparatus as claimed in any of the claims 15 to 18 wherein the frequency band is a frequency band of a second communication system.

20. An apparatus as claimed in claim 19 wherein the cellular communication system and the second communication system use different radio access technologies.

21. An apparatus as claimed in claim 20 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

22. An apparatus as claimed in claim 20 wherein the cellular commumcation system is a UMTS communication system and the second communication system is a GSM communication system.

23. An apparatus as claimed in any of the claims 21 or 22 wherein the means for determining a measuring performance characteristic is operable to determine the measuring performance characteristic from a subscriber unit capability report indicating if compressed mode is required to perform measurements on the GSM communication system.

24. An apparatus as claimed in any of the claims 15 to 23 further comprising means for determining a handover candidate carrier from the subset of carriers.

25. An apparatus as claimed in any of the claims 15 to 24 wherein the means for determining a measuring performance characteristic is operable to determine the measuring performance characteristic from the number of measurement reports reported from the subscriber unit within a given time interval.

26. A cellular communication system comprising the apparatus of any of the preceding claims 15 to 25.

27. A subscriber unit operable to be served by a cellular communication system and to measure earners in a frequency band, the subscriber unit comprising: means for determining a measuring performance characteristic of the subscriber unit related to the measurement perfonnance of the subscriber unit when measuring earners in the frequency band; and means for selecting a subset of carriers in the frequency band to be measured by the subscriber unit in response to the measuring performance characteristic; and means for measuring the carriers of the subset of carriers.

28. A subscriber unit as claimed in claim 27 wherein the measuring performance characteristic is indicative of the time required for the subscriber unit to measure carriers in the frequency band.

29. A subscriber unit as claimed in any of the claims 27 to 28 wherein the measuring performance characteristic is indicative of the number of receivers in the subscriber unit.

30. A subscriber unit as claimed in any of the claims 27 to 29 wherein the frequency band is a frequency band ofa second communication system.

31. A subscriber unit as claimed in any of the claims 27 to 30 wherein the cellular communication system and the second communication system use different radio access technologies.

32. A subscriber unit as claimed in claim 31 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

33. A subscriber unit as claimed in any claim 31 wherein the cellular communication system is a UMTS communication system and the second communication system is a', 'GSM communication system.

34. A subscriber unit as claimed in any of the claims 27 to 33 further comprising means for determining a handover candidate carrier from the subset of carriers.']

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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.