Method and apparatus for resource assignment in a wireless communication system

• US 6,137,787 A
• Filed: 04/03/1997
• Issued: 10/24/2000
• Est. Priority Date: 04/03/1997
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.), Opto Power Corporation (MKS Instruments Incorporated)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Qiu, Xiaoxin, Chawla, Kapil K.
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Sam, Phirin
• Application Number:
  US08/832,546
• Time in Patent Office: 1,300 Days
• Field of Search: 370/229, 370/230, 370/231, 370/370, 370/389, 370/321, 370/329, 370/337, 370/336, 370/341, 370/347, 370/349, 370/442, 370/477, 370/468, 455/62, 455/63, 455/447, 455/450, 455/453, 455/403, 455/422, 455/446, 455/524, 455/525, 455/103, 455/132, 455/166.2, 455/168.1, 455/179.1, 455/180.1
• US Class Current: 370/337
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/02 Hybrid access

Abstract

A method and apparatus for assigning communication resources for at least one communication site in a time division communication system having multiple reuse patterns in the time domain. A first plurality of communication sites communicate using a first portion of a time frame corresponding to a first reuse pattern. A second plurality of communication sites communicate using a second portion of said time frame corresponding to a second reuse pattern.

Claims

1. A method for operating a communication system having multiple reuse patterns in the time domain, comprising the steps of:

communicating with a first plurality of communication sites using a first portion of a time frame corresponding to a first time domain reuse pattern; and

communicating with a second plurality of communication sites using a second portion of said time frame corresponding to a second time domain reuse pattern.

2. The method of claim 1, wherein said first portion is a dedicated portion and said second portion is a shared portion.

3. The method of claim 2, wherein said dedicated portion and said shared portion are divided into a plurality of time slots, and further comprising the steps of:

categorizing each communication site according to a classifying signal-to-interference ratio threshold;

assigning each communication site a time slot in said time frame based on said categorization; and

communicating information in said assigned time slot.

4. The method of claim 3, wherein each communication site is assigned said time slot in said time frame based on said categorization and an application at each communication site.

5. The method of claim 4, wherein said categorizing step includes measuring an average signal-to-interference ratio for each communication site in both said shared and said dedicated portions of said time frame, and categorizing each communication site by comparing said average signal-to-interference ratio with said classifying signal-to-interference ratio.

6. The method of claim 5, wherein if said average signal-to-interference ratio for a communication in said shared portion is larger than said classifying threshold, then said communication site is assigned to a first category, and if the average signal-to-interference ratio in said dedicated portion is larger than said classifying signal-to-interference ratio, then said communication site is assigned to a second category, with all remaining communication sites assigned to a third category.

7. The method of claim 4, wherein said communication site engaged in said application is assigned said time slot within a portion of said time frame based upon a Quality of Service requirement for said application.

8. The method of claim 7, wherein said communication site engaged in said application requires a more stringent Quality of Service requirement and is assigned a higher priority than a communication site engaged in an application requiring a less stringent Quality of Service requirement.

9. The method of claim 8, wherein said communication sites engaged in said more stringent Quality of Service requirement application are first assigned in said dedicated portion, with any remaining communication sites engaged in said more stringent Quality of Service requirement application assigned in said shared portion.

10. The method of claim 9, wherein said communication sites engaged in said less stringent Quality of Service requirement application are assigned after said communication sites engaged in said more stringent Quality of Service requirement application, with said communication sites engaged in said less stringent Quality of Service requirement application belonging to said second category using said dedicated portion first, with any remaining communications sites engaged in less stringent Quality of Service requirement application in said first and second categories assigned in any remaining shared portion.

11. The method of claim 10, wherein said more stringent Quality of Service requirement application is voice communications, and said less stringent Quality of Service requirement application is data communications.

12. The method of claim 1, further comprising the steps of:

grouping communication sites by application;

ordering each communication site within a group;

prioritizing said groups;

assigning time slots according to said prioritization of said groups; and

monitoring assignment of communication sites to time slots and ensuring each terminal has fair access to the communication resource.

13. The method of claim 1, wherein the communication system is a packet-switched system.

14. The method of claim 1, wherein the communication sites are fixed.

15. The method of claim 1, wherein the communication sites are mobile.

16. The method of claim 1, wherein the communication system uses time division multiplexing for the downlink.

17. The method of claim 1, wherein the communication system uses time division multiple access for the uplink.

18. The method of claim 1, wherein a communication site is assigned a reuse pattern which guarantees Quality of Service requirements for each application provided by the system.

19. An apparatus for operating a communication system having multiple reuse patterns in the time domain, comprising:

means for assigning a first plurality of communication sites to a first portion of a time frame corresponding to a first time domain reuse pattern, and a second plurality of communication sites to a second portion of said time frame corresponding to a second time domain reuse pattern; and

a transceiver for communicating information for said communication site.

20. The apparatus of claim 19, wherein said first portion is a dedicated portion and said second portion is a shared portion.

21. The method of claim 20, wherein said dedicated portion and said shared portion are divided into a plurality of time slots, and further comprises:

means for categorizing each communication site according to a classifying SIR threshold;

means for assigning each communication site a time slot in said time frame based on said categorization.

22. The method of claim 21, wherein each communication site is assigned said time slot in said time frame based on said categorization and an application at each communication site.

23. The apparatus of claim 22, wherein said categorizing means measures an average signal-to-interference ratio for each communication site in both said shared and said dedicated portions of said time frame, and categorizes each communication site by comparing said average signal-to-interference ratio with said classifying signal-to-interference ratio.

24. The apparatus of claim 23, wherein if said average signal-to-interference ratio for a communication in the shared portion is larger than said classifying threshold, then said communication site is assigned to a first category, and if the average signal-to-interference ratio in the dedicated portion is larger than said classifying signal-to-interference ratio, then said communication site is assigned to a second category, with all remaining communication sites assigned to a third category.

25. The apparatus of claim 22, wherein said communication site engaged in said application is assigned said time slot within a portion of said time frame based upon a Quality of Service requirement for said application.

26. The apparatus of claim 25, wherein said communication site engaged in said application requires a more stringent Quality of Service requirement and is assigned a higher priority than a communication site engaged in an application requiring a less stringent Quality of Service requirement.

27. The apparatus of claim 26, wherein said communication sites engaged in said more stringent Quality of Service requirement application are first assigned in said dedicated portion, with any remaining communication sites engaged in said more stringent Quality of Service requirement application assigned in said shared portion.

28. The apparatus of claim 27, wherein said communication sites engaged in said less stringent Quality of Service requirement application are assigned after said communication sites engaged in said more stringent Quality of Service requirement application, with said communication sites engaged in said less stringent Quality of Service requirement application belonging to said second category using said dedicated portion first, with any remaining communications sites engaged in less stringent Quality of Service requirement application in said first and second categories assigned in any remaining shared portion.

29. The method of claim 28, wherein said more stringent Quality of Service requirement application is voice communications, and said less stringent Quality of Service requirement application is data communications.

30. The apparatus of claim 29, further comprising:

means for grouping communication sites by application;

means for ordering each communication site within a group;

means for prioritizing said groups;

means for assigning time slots according to said prioritization of said groups; and

means for monitoring assignment of communication sites to time slots and ensuring each terminal has fair access to the communication resource.

31. The apparatus of claim 19, wherein the communication system is a packet-switched system.

32. The apparatus of claim 19, wherein the communication sites are fixed.

33. The apparatus of claim 19, wherein the communication sites are mobile.

34. The apparatus of claim 19, wherein the communication system uses time division multiplexing for the downlink.

35. The apparatus of claim 19, wherein the communication system uses time division multiple access for the uplink.

36. The apparatus of claim 19, wherein said matching means matches a communication site to the reuse pattern which guarantees a Quality of Service requirement for each application provided by the system.