Transmission of mobile requests in wireless uplink system

• US 6,807,160 B1
• Filed: 06/19/2000
• Issued: 10/19/2004
• Est. Priority Date: 06/19/2000
• Status: Expired due to Term

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Uppala, Sathyadev Venkata, Laroia, Rajiv, Li, Junyi
• Primary Examiner(s): MARCELO, MELVIN C
• Application Number:
  US09/596,434
• Time in Patent Office: 1,583 Days
• Field of Search: 370/329, 370/330, 370/347, 370/348, 370/442, 370/443
• US Class Current: 370/329
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Access request transmissions are effected in a wireless communications system by assigning each mobile unit a unique dedicated uplink resource. Specifically, each mobile unit is assigned channel segments with distinct time slot indices and/or waveform indices, where waveforms with distinct indices are orthogonal. A base station can identify the mobile that has made an access request from the dedicated uplink resource. Therefore, no mobile identification number is needed in the uplink request message. Then, the base station can transmit a request response message on a shared downlink resource that may include the identification number of the requesting mobile unit to acknowledge reception of the request. The mobile unit may transmit on a shared uplink resource an acknowledgment of reception of the downlink request response message.

Claims

1. A method for use in a wireless communications mobile unit comprising the steps of:

transmitting an access request message on a wireless uplink to a base station on a uplink resource dedicated to a particular mobile unit, wherein no identification of the particular mobile unit need be transmitted to said base station;

detecting a received request response message on a wireless downlink from said base station on a downlink resource shared with other mobile units; and

transmitting an acknowledgment message indicative of reception of said request response message to said base station on a shared uplink acknowledgment resource having a one-to-one correspondence, i.e., slaved, to said shared downlink response resource on which said response message was received,

whereby latency is reduced and reliability is improved.

2. The method as defined in claim 1 wherein said prescribed uplink resource is a segment.

3. The method as defined in claim 2 wherein said segment includes distinct time slot indices and/or waveform indices, where waveforms with distinct indices are orthogonal.

4. The method as defined in claim 1 wherein said shared downlink resource includes at least one response time slot.

5. The method as defined in claim 1 wherein said shared uplink resource includes at least one segment.

6. The method as defined in claim 5 wherein said shared uplink resource includes a number of segments based on a prescribed relationship to the number of response messages.

7. The method as defined in claim 6 wherein said number of segments is equal to said number of response messages and each of said segments has a one-to-one correspondence to a response message.

8. A method for use in a wireless communications mobile unit comprising the steps of:

transmitting an access request message on a resource dedicated to a mobile unit to a base station;

detecting a request response message received from said base station on a prescribed downlink resource; and

transmitting an acknowledgment message indicative of reception of said request response message on a prescribed shared uplink resource to said base station,

wherein said shared downlink resource includes a number of time slots based on a number of mobile units that are sharing said shared downlink resource,

whereby latency is reduced and reliability is improved.

9. The method as defined in claim 8 wherein the number of time slots is less than the number of mobile units.

10. A method for use in a wireless communications base station comprising the steps of:

monitoring received request time slots to detect an incoming request from one or more mobile units on time slots, each of said time slots dedicated on a one-to-one basis to said one or more mobile units;

determining whether any requests have been received;

if at least one request has been received, transmitting a request response message on a shared downlink resource to said one or more requesting mobile units corresponding to said at least one request; and

determining whether an acknowledgment message has been received on a shared unlink acknowledgment resource having a one-to-one correspondence i.e., slaved, to said downlink response resource on which said response message was transmitted indicating that said intended mobile unit has received said response message,

whereby latency is reduced and reliability is improved.

11. The method as defined in claim 10 wherein said shared downlink resource includes at least one response time slot.

12. The method as defined in claim 10 wherein said shared uplink resource includes at least one segment.

13. The method as defined in claim 12 wherein said shared uplink resource includes a number of segments based on a prescribed relationship to the number of response messages.

14. A method for use in a wireless communications base station comprising the steps of:

monitoring received request time slots to detect an incoming request from at least one mobile unit on time slot dedicated to said at least one mobile unit;

determining whether any requests have been received;

if at least one request has been received, transmitting a request response message on a shared downlink resource to an intended one of one or more requesting mobile units, said shared downlink resource including a number of time slots based on a number of mobile units that are sharing said shared downlink resource; and

determining whether an acknowledgment message has been received indicating that said intended mobile unit has received said response message;

whereby latency is reduced and reliability is improved.

15. A method for use in a wireless communications system including one or more base stations and one or more mobile units comprising the steps of:

in a particular mobile unit,

transmitting an access request message on a resource dedicated to said particular mobile unit to a base station, wherein no identification of the particular mobile unit need be transmitted,

detecting a request response message received from said base station on a prescribed downlink resource shared with others of said one or more mobile units, and

transmitting an acknowledgment message indicative of reception of said request response message on a prescribed shared uplink resource to said base station,

wherein said prescribed shared uplink resource has a one-to-one correspondence, i.e., is slaved, to said prescribed shared downlink resource; and

in a base station,

monitoring received request time slots to detect an incoming request from one or more mobile units on time slots, each of said time slots dedicated on a one-to-one basis to said one or more mobile units,

determining whether any requests have been received,

if at least one request has been received, transmitting a request response message on a shared downlink resource to an intended one of one or more requesting mobile units corresponding to said at least one request,

determining whether an acknowledgment message has been received on a shared uplink acknowledgment resource having a one-to-one correspondence, i.e., being slaved, to said downlink response resource on which said response message was transmitted indicating that said intended one mobile unit has received said response messages, and

wherein said prescribed shared uplink resource has a one-to-one correspondence, i.e., is slaved, to said prescribed shared downlink resource,

whereby latency is reduced and reliability is improved.

16. The method as defined in claim 15 wherein said request time slots are dedicated on a one-to-one basis to mobile units.

17. The method as defined in claim 15 wherein said step of transmitting said response message includes a step of transmitting said response message on a prescribed shared downlink resource.

18. The method as defined in claim 15 wherein said prescribed shared downlink resource includes at least one response time slot.

19. The method as defined in claim 18 wherein said prescribed shared downlink resource includes a number of time slots based on a number of mobile units that are sharing said prescribed shared downlink resource.

20. The method as defined in claim 19 wherein the number of time slots is less than the number of mobile units.

21. The method as defined in claim 15 wherein said prescribed shared uplink resource includes at least one segment.

22. The method as defined in claim 21 wherein said prescribed shared uplink resource includes a number of segments based on a prescribed relationship to the number of response messages.

23. The method as defined in claim 22 wherein said number of segments is equal to said number of response messages and each of said segments has a one-to-one correspondence to a response message.

24. Apparatus for use in a wireless communications mobile unit comprising:

a controllable transmitter for transmitting an access request message on a wireless uplink to a base station on a uplink resource dedicated to a particular mobile unit, wherein no identification of the particular mobile unit need be transmitted to said base station;

a controllable receiver for detecting a received request response message on a wireless downlink from said base station on a downlink resource shared with other mobile units; and

wherein said transmitter transmits an acknowledgment message indicative of reception of said request response message to said base station on a shared uplink acknowledgment resource having a one-to-one correspondence, i.e., slaved to said shared downlink response resource on which said response message was received,

whereby latency is reduced and reliability is improved.

25. The apparatus as defined in claim 24 wherein said prescribed uplink resource is a segment.

26. The apparatus as defined in claim 25 wherein said segment includes distinct time slot indices and/or waveform indices, where waveforms with distinct indices are orthogonal.

27. The apparatus as defined in claim 24 wherein said prescribed shared downlink resource includes at least one response time slot.

28. The apparatus as defined in claim 27 wherein said prescribed shared downlink resource includes a number of time slots based on a number of mobile units that are sharing said shared downlink resource.

29. The apparatus as defined in claim 28 wherein said number of time slots is less than said number of mobile units.

30. The apparatus as defined in claim 24 wherein said prescribed shared uplink resource includes at least one segment.

31. The apparatus as defined in claim 30 wherein said prescribed shared uplink resource includes a number of segments based on a prescribed relationship to the number of response messages.

32. The apparatus as defined in claim 31 wherein said number of segments is equal to said number of response messages and each of said segments has a one-to-one correspondence to a response message.

33. Apparatus for use in a wireless communications base station comprising:

a controllable receiver for monitoring received request time slots to detect an incoming request from one or more mobile units on time slots, dedicated on a one-to-one basis to said one or more mobile units;

a controller for determining whether any requests have been received;

a controllable transmitter, responsive to a determination that at least one request has been received, for transmitting a request response message on a shared downlink resource to said one or more requesting mobile units corresponding to said at least one request; and

said controller determining whether an acknowledgment message has been received on a shared uplink acknowledgment resource having a one-to-one correspondence, i.e., slaved, to said downlink response resource on which said response message was transmitted indicating that said intended mobile unit has received said response message on a shared uplink acknowledgment resource having a one-to-one correspondence, i.e., slaved, to said downlink response resource on which said response message was transmitted,

whereby latency is reduced and reliability is improved.

34. The apparatus as defined in claim 33 wherein said shared downlink resource includes at least one response time slot.

35. The apparatus as defined in claim 34 wherein said shared downlink resource includes a number of time slots based on a number of mobile units that are sharing said shared downlink resource.

36. The apparatus as defined in claim 35 wherein said number of time slots is less than said number of mobile units.

37. The apparatus as defined in claim 33 wherein said shared uplink resource includes at least one segment.

38. The apparatus as defined in claim 37 wherein said shared uplink resource includes a number of segments based on a prescribed relationship to the number of response messages.

39. The apparatus as defined in claim 38 wherein said number of segments is equal to said number of response messages and each of said segments has a one-to-one correspondence to a response message.

40. Apparatus for use in a wireless communications system including one or more base stations and one or more mobile units comprising:

in a particular mobile unit,

a controllable transmitter for transmitting an access request message to a base station on a resource dedicated to said particular mobile unit, wherein no identification of the particular mobile unit need be transmitted,

a controllable receiver for detecting a request response message received from said base station on a prescribed downlink resource shared with others of said one or more mobile units, and

wherein said transmitter transmits an acknowledgment message indicative of reception of said request response message on a prescribed shared uplink resource to said base station; and

in a base station,

a controllable receiver for monitoring received request time slots to detect an incoming request from one or more mobile units on time slots, each of said time slots dedicated on a one-to-one basis to said one or more mobile units,

a controller for determining whether any requests have been received;

a controllable transmitter responsive to a determination that at least one request has been received, for transmitting a request response message on a shared downlink resource to an intended one of one or more requesting mobile units corresponding to said at least one request, and

said controller determining whether an acknowledgment message has been received on a shared uplink acknowledgment resource having a one-to-one correspondence i.e., being slaved, to said downlink response resource on which said response message was transmitted indicating that said intended one mobile unit has received said response message,

wherein said prescribed shared uplink resource has a one-to-one correspondence, i.e., is slaved, to said prescribed shared downlink resource,

whereby latency is reduced and reliability is improved.

41. The apparatus as defined in claim 40 wherein said prescribed uplink resource is a segment.

42. The apparatus as defined in claim 41 wherein said segment includes distinct time slot indices and/or waveform indices, where waveforms with distinct indices are orthogonal.

43. The apparatus as defined in claim 40 wherein said prescribed shared downlink resource includes at least one response time slot.

44. The apparatus as defined in claim 43 wherein said prescribed shared downlink resource includes a number of time slots based on a number of mobile units that are sharing said shared downlink resource.

45. The apparatus as defined in claim 44 wherein said number of time slots is less than said number of mobile units.

46. The apparatus as defined in claim 40 wherein said prescribed shared uplink resource includes at least one segment.

47. The apparatus as defined in claim 46 wherein said prescribed shared uplink resource includes a number of segments dependent on a prescribed relationship to the number of response messages.

48. The apparatus as defined in claim 47 wherein said number of segments is equal to said number of response messages and each of said segments has a one-to-one correspondence to a response message.