Channel assignment in enhanced fixed-plan mobile communications systems

• US 6,091,954 A
• Filed: 04/07/1997
• Issued: 07/18/2000
• Est. Priority Date: 09/01/1994
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Dent, Paul W., Haartsen, Jacobus C.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Kincaid, Lester G.
• Application Number:
  US08/831,536
• Time in Patent Office: 1,198 Days
• Field of Search: 455/62, 455/63, 455/435, 455/447, 455/448, 455/450, 455/451, 455/525, 455/509, 455/513, 455/436, 455/437, 455/438, 455/439
• US Class Current: 455/447
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/12 Discriminative metering , charging or billing
• CPC Class Codes: H04M 2215/2026 Wireless network, e.g. GSM, PCS, TACS
• CPC Class Codes: H04M 2215/22 Bandwidth or usage-sensitve billing
• CPC Class Codes: H04M 2215/32 Involving wireless systems
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• CPC Class Codes: H04W 4/24 Accounting or billing
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities

Abstract

In a multi-reuse level cellular communications system, a channel is assigned for use by a mobile unit by first determining whether the mobile unit is a non-enhanced mobile unit or an enhanced mobile unit. Then a determination is made as to the type of communication service being requested. A minimum link quality required by the mobile unit can then be established based on factors that include the mobile unit type and the type of communication service being requested. A base station that has the necessary receiver detection capabilities and transceiver processing capabilities is then selected, and a channel, corresponding to a highest reuse plan, available to the base station is assigned to the call.

Claims

1. In a cellular telecommunications system, a method of assigning a channel to a mobile call, said method comprising the steps of:

determining a minimum link quality required for the mobile call;

selecting a base station from a plurality of base stations as a function of said required minimum link quality, wherein each of said plurality of base stations corresponds to a different minimum link quality, and wherein said selected base station comprises receiver detection characteristics that enable the selected base station to operate at the minimum required link quality; and

assigning a channel to the mobile call, wherein the channel is associated with the selected base station.

2. The method of claim 1, wherein said step of determining a minimum link quality is based on mobile unit receiver detection capabilities.

3. The method of claim 2, wherein the mobile unit receiver detection capabilities include receiver diversity.

4. The method of claim 2, wherein the mobile unit receiver detection capabilities include interference cancellation.

5. The method of claim 4, wherein the selected base station receiver detection characteristics include receiver diversity.

6. The method of claim 4, wherein the selected base station receiver detection characteristics include interference cancellation.

7. The method of claim 1, wherein said step of assigning a channel comprises the step of:

identifying an available channel.

8. The method of claim 1, wherein said step of assigning a channel comprises the step of:

randomly selecting an available channel.

9. The method of-claim 1, wherein said step of assigning a channel comprises the step of:

selecting a least interfered available channel.

10. The method of claim 1, wherein said step of assigning a channel comprises the step of:

selecting an available channel that exhibits a link quality that exceeds a predetermined threshold.

11. In a cellular telecommunications system, a method of assigning a channel to a mobile call, said method comprising the steps of:

determining a minimum link quality required for the mobile call;

selecting one of a plurality of base station transceivers associated with a base station, wherein each of the transceivers corresponds to a different fixed reuse plan, and wherein the selected one of said plurality of base station transceivers comprises receiver detection characteristics that enable the base station to operate at the minimum required link quality; and

assigning a channel to the mobile call, wherein the channel is associated with the fixed reuse plan that corresponds with the selected transceiver.

12. The method of claim 11, wherein said step of determining a minimum link quality is based on mobile unit receiver detection capabilities.

13. The method of claim 12, wherein the mobile unit receiver detection capabilities include receiver diversity.

14. The method of claim 12, wherein the mobile unit receiver detection capabilities include interference cancellation.

15. The method of claim 11, wherein said step of selecting a base station transceiver depends on the transceiver'"'"'s receiver detection characteristics.

16. The method of claim 15, wherein the base station transceiver'"'"'s receiver detection characteristics include receiver diversity.

17. The method of claim 15, wherein the base station transceiver'"'"'s receiver detection characteristics include interference cancellation.

18. The method of claim 11, wherein said step of assigning a channel comprises the step of:

identifying an available channel.

19. The method of claim 18, wherein said step of assigning a channel comprises the step of:

randomly selecting an available channel.

20. The method of claim 18, wherein said step of assigning a channel comprises the step of:

selecting a least interfered available channel.

21. The method of claim 18, wherein said step of assigning a channel comprises the step of:

selecting an available channel that exhibits a link quality that exceeds a predetermined threshold.

22. In a mobile telecommunications system, a method of assigning a channel to a mobile unit, said method comprising the steps of:

determining a communication data service being requested by the mobile unit;

selecting a base station that is capable of processing the requested communication data service;

determining a mobile unit type;

determining a minimum required link quality for the mobile unit;

selecting one of a plurality of fixed reuse plans, wherein the selected reuse plan assures at least said minimum required link quality; and

assigning one of a plurality of channels allocated to the base station, wherein said channel is associated with the selected fixed reuse plan.

23. The method of claim 22, wherein said step of determining a minimum required link quality depends upon the requested communication data service and the mobile unit type.

24. The method of claim 23, wherein the requested communication service is a low bit rate data service.

25. The method of claim 24, wherein the low bit rate data service includes forward error correction coding.

26. The method of claim 23, wherein the requested communication service is a high bit rate data service.

27. The method of claim 26, wherein the high bit rate data service includes forward error correction coding.

28. The method of claim 26, wherein the high bit rate data service includes multi-level modulation.

29. The method of claim 23, wherein said step of assigning a channel comprises the steps of:

determining whether a channel associated with the selected fixed reuse plan that at least assures the minimum required link quality is available;

if a channel is available, selecting a channel associated with the fixed reuse plan that at least assures the minimum required link quality; and

if a channel is not available, selecting a channel associated with a next highest reuse plan which has an available channel and is capable of assuring the minimum required link quality.

30. The method of claim 29, wherein said step of selecting a channel associated with the fixed reuse plan if a channel is available comprises the step of:

randomly selecting an available channel from a group of available channels.

31. The method of claim 29, wherein said step of selecting a channel associated with the fixed reuse plan if a channel is available comprises the step of:

selecting a least interfered with available channel from a group of available channels.

32. The method of claim 29, wherein said step of selecting a channel associated with the fixed reuse plan if a channel is available comprises the step of:

selecting an available channel that exhibits a link quality that exceeds a predetermined link quality threshold level.

33. In a mobile telecommunications system, a method of assigning a channel, associated with one of a number of different fixed reuse plans, to a mobile unit, said method comprising the steps of:

determining a communication service being requested by the mobile unit;

determining a mobile unit type;

determining a minimum required link quality for the mobile unit based upon the requested communication service and the mobile unit type;

selecting a base station that has the capability to support the requested communication service, and is known to have an available channel associated with a fixed reuse plan that at least assures the minimum required link quality; and

assigning the available channel.

34. The method of claim 33, wherein the requested communication service is a low bit rate data service.

35. The method of claim 34, wherein the low bit rate data service includes forward error correction coding.

36. The method of claim 33, wherein the requested communication service is a high bit rate data service.

37. The method of claim 36, wherein the high bit rate data service includes forward error correction coding.

38. The method of claim 36, wherein the high bit rate data service includes multi-level modulation.