Method and apparatus for selecting carriers

Abstract

This invention relates to a method and apparatus for selecting carriers to be measured by a subscriber 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 apparatus 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				Yes	Basis Patent

Specification Information

Spec Number

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
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
EP1479259A1	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 having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
Dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and
Dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.', 'Dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and', 'Dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.

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 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 claim 1 wherein the frequency of measurement updates is indicative of the number of receivers in the subscriber unit.

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

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

7. A method of selecting carriers as claimed in claim 6 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

8. A method of selecting carriers as claimed in claim 6 wherein the cellular communication system is a UMLTS communication system and the second communication system is a GSM communication system.

9. A method of selecting carriers as claimed in claim 6 wherein an update frequency capability of the subscriber unit is determined from a subscriber unit capability report indicating if compressed mode is required to perform measurements on a GSM communication system

10. A method of selecting carriers as claimed in claim 1 wherein the size of the subset of carriers is dependent on an update frequency capability of the subscriber unit

11. A method of selecting carriers as claimed in claim 1 wherein the subset of carriers is an ordered subset of carriers and the order of carriers in the subset of carriers is dependent on an update frequency capability of the subscriber unit

12. A method of selecting carriers as claimed in claim 1 further comprising the step of determining a handover candidate carrier from the subset of carriers

13. A method of selecting carriers as claimed in claim 1 wherein the frequency of measurement updates is determined from the number of measurement reports reported from the subscriber unit within a given time interval

14. An apparatus for selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
Means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and
Means for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.', 'Means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and', 'Means for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit

15. An apparatus as claimed in claim 14 further comprising means for transmitting identification of the subset of carriers to the subscriber unit

16. An apparatus as claimed in claim 14 wherein the frequency of measurement updates is indicative of the number of receivers in the subscriber unit

17. An apparatus as claimed in claim 14 wherein the frequency band is a frequency band of a second communication system

18. An apparatus as claimed in claim 17 wherein the cellular communication system and the second communication system use different radio access technologies

19. An apparatus as claimed in claim 18 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

20. An apparatus as claimed in claim 18 wherein the cellular communication system is a UMTS communication system and the second communication system is a GSM communication system.

21. An apparatus as claimed in claim 18 wherein the means for determining is operable to determine an update frequency capability of the subscriber unit from a subscriber unit capability report indicating if compressed mode is required to perform measurements on a GSM communication system.

22. An apparatus as claimed in claim 14 further comprising means for determining a handover candidate carrier from the subset of carriers.

23. An apparatus as claimed in claim 14 wherein the means for determining is operable to determine the frequency of measurement updates from the number of measurement reports reported from the subscriber unit within a given time interval.

24. A cellular communication system comprising the apparatus of claim 14.

25. A subscriber unit for selecting carriers to be measured by a subscriber unit served by a cellular communication system and having a number of receivers operable to measure carriers in a frequency band, the method comprising the steps of:
means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and
means for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.', 'means for dynamically determining a frequency of measurements updates when measuring carriers in the frequency band; wherein the frequency of measurements updates is indicative of the amount of time required by the subscriber unit to measure the carriers and wherein the amount of time required to measure the carriers is dependent on how many receivers a subscriber unit have; and', 'means for dynamically selecting a subset of carriers in the frequency band to be measured by the subscriber unit based on the frequency of measurement updates which is dependent on the frequency of measurement updates, which in turn is based on the number of receivers in a subscriber unit.

26. A subscriber unit as claimed in claim 25 wherein the frequency of measurement updates is indicative of the number of receivers in the subscriber unit.

27. A subscriber unit as claimed in claim 25 wherein the frequency band is a frequency band of a second communication system.

28. A subscriber unit as claimed in claim 25 wherein the cellular communication system and the second communication system use different radio access technologies.

29. A subscriber unit as claimed in claim 28 wherein the cellular communication system is a GSM communication system and the second communication system is a UMTS communication system.

30. A subscriber unit as claimed in claim 28 wherein the cellular communication system is a UMTS communication system and the second communication system is a GSM communication system.

31. A subscriber unit as claimed in claim 25 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)

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

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