Uplink resource allocation in a mobile communication system

• US 8,576,784 B2
• Filed: 11/02/2006
• Issued: 11/05/2013
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Lhr, Joachim, Seidel, Eiko
• Primary Examiner(s): LY, ANH VU H
• Application Number:
  US12/162,592
• Publication Number:
  US 20090116434A1
• Time in Patent Office: 2,560 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/02 Hybrid access
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

The present invention relates to a method and mobile terminal for requesting resources for transmitting data on uplink within a mobile communication system. Further the invention relates to a network entity for allocating uplink resources to mobile terminal. To provide a flexible scheduling scheme for uplink transmission, the invention proposes different scheduling procedures based on a request grant scheme. The resource request of the mobile terminal is provided via a contention-based channel, while all further communication uses scheduled resources. Consequently subsequent transmissions of user data and/or scheduling information utilize scheduled resources.

Claims

1. A method for requesting resources for transmitting data on uplink within a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, the method being performed by a mobile terminal and comprising:

transmitting a resource request to a network entity responsible for resource allocation via the contention-based channel,

receiving, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel, and

receiving a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

2. The method according to claim 1, wherein the resource allocation message received in response to the resource request indicates resources granted to the mobile terminal for transmitting the reference signal.

3. The method according to claim 1, wherein the mobile terminal utilizes the resources granted for the scheduled shared channel as indicated in the resource allocation message received in response to the resource request for repeatedly transmitting the reference signal.

4. The method according to claim 3, wherein the resource allocation message received in response to the resource request indicates resources granted to the mobile terminal for repeatedly transmitting the reference signal and the mobile terminal utilizes the resources granted for repeatedly transmitting the reference signal to repeatedly transmit the reference signal.

5. The method according to claim 3, wherein a frequency of the transmission of the reference signal is configured by control signaling received from a radio access network of the mobile communication system, or is controlled by the mobile terminal.

6. The method according to claim 3, wherein the mobile terminal stops transmitting the reference signal upon having received a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel in response to a transmission of the scheduling information.

7. The method according to claim 1, wherein a single carrier Frequency Division Multiple Access (FDMA) scheme is used to transmit data on the uplink.

8. The method according to claim 1, wherein the contention-based channel is mapped to a distributed spectrum on the uplink scheme.

9. The method according to claim 1, wherein a bandwidth utilized for transmitting resource request on the uplink scheme is proportional to a priority of the data for which resources for transmission is requested.

10. The method according to claim 1, wherein a bandwidth the mobile terminal is configured to utilize for transmitting the resource request is configured by control signaling received from a radio access network of the mobile communication system.

11. The method according to claim 1, wherein the method further comprises determining a bandwidth to utilize for transmitting the resource request based on a priority of the data for which resource allocation is requested.

12. The method according to claim 1, wherein the resources for transmitting data on the scheduled shared channel are granted on a transmission time interval basis.

13. The method according to claim 12, wherein the resource allocation message indicates at least one transmission time interval or a number of transmission time intervals for which the resource allocation message grants resources.

14. The method according to claim 1, wherein the resource request transmitted by the mobile terminal does not comprise scheduling information.

15. The method according to claim 1, wherein the resource request comprises an implicit or explicit identification of the requesting mobile terminal.

16. The method according to claim 1, wherein the resource request comprises a flag indicating to the network entity responsible for resource allocation that the mobile terminal requests the allocation of resources for data transmission.

17. The method according to claim 16, wherein the method further comprises scrambling the resource request with a user-specific scrambling code prior to the transmission of the resource request.

18. The method according to claim 1, wherein the resource request comprises an identifier of the mobile terminal indicating to the network entity responsible for resource allocation that the mobile terminal requests the allocation of resources for data transmission.

19. The method according to claim 1, wherein the resource request comprises resource information indicating uplink resources required by the mobile terminal for transmitting user data.

20. The method according to claim 19, wherein the resource information comprises a flow identifier of a data flow through which the mobile terminal intends to transmit user data or a number of hits the mobile terminal intends to transmit.

21. The method according to claim 19, wherein the resource information consists of a flag indicating to the network entity responsible for resource allocation, when set, that the mobile terminal intends to transmit data of a delay-critical service.

22. The method according to claim 1, wherein the resource allocation message received in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation and the method further comprises:

transmitting, in response to the resource allocation message, the scheduling information to the network entity responsible for resource allocation via the scheduled shared channel, and

receiving, in response to the transmitting of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel.

23. The method according to claim 1, further comprising receiving, in response to the resource request, a timing adjustment command from the network entity responsible for resource allocation, wherein the timing adjustment command is comprised in the resource allocation message received in response to the resource request.

24. The method according to claim 23, further comprising realigning uplink timing according to the timing adjustment command prior to transmitting of scheduling information via the scheduled shared channel.

25. The method according to claim 1, wherein the resource allocation message received in response to the resource request grants resources for transmitting data including user data via the scheduled shared channel.

26. The method according to claim 1, further comprising receiving information indicating a periodicity of the repeatedly transmitting reference signal.

27. A method for allocating resources to a mobile terminal for transmitting data on uplink within a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, the method being performed by a network entity responsible for resource allocation of the mobile communication system and comprising:

receiving a resource request from the mobile terminal via the contention-based channel,

transmitting, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel to the mobile terminal, and

transmitting a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

28. The method according to claim 27, wherein the resource allocation message transmitted in response to the resource request indicates resources granted to the mobile terminal for transmitting the reference signal.

29. The method according to claim 27, further comprising repeatedly receiving the reference signal from the mobile terminal.

30. The method according to claim 27, wherein a single carrier Frequency Division Multiple Access (FDMA) scheme is used to transmit data on the uplink.

31. The method according to claim 30, wherein the contention-based channel is mapped to a distributed spectrum on the uplink scheme.

32. The method according to claim 27, wherein the network entity responsible for resource allocation grants the resources for transmitting data on the scheduled shared channel on a transmission time interval basis.

33. The method according to claim 32, wherein the resource allocation message indicates at least one transmission time interval or a number of transmission time intervals for which the resource allocation message grants resources.

34. The method according to claim 27, wherein the resource allocation message transmitted in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation and the method further comprises:

receiving the scheduling information from the mobile station via the scheduled shared channel, and

transmitting, in response to the reception of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel to the network entity responsible for resource allocation.

35. The method according to claim 27, further comprising transmitting, in response to the resource request, a timing adjustment command to the mobile terminal, wherein the timing adjustment command is comprised in the resource allocation message transmitted to the mobile terminal in response to the resource request.

36. The method according to claim 35, wherein the timing adjustment command is configured to cause the mobile terminal to realign uplink timing prior to the mobile terminal transmitting of scheduling information via the scheduled shared channel.

37. The method according to claim 27, wherein the resource allocation message transmitted in response to the resource request grants resources to the mobil terminal for transmitting data including user data via the scheduled shared channel.

38. The method according to claim 27, further comprising transmitting information indicating a periodicity of repeatedly transmitting the reference signal by the mobile terminal.

39. A mobile terminal for use in a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, the mobile terminal comprising:

a transmitter configured to transmit a resource request to a network entity responsible for resource allocation via the contention-based channel, and a receiver configured to receive, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel, wherein

the receiver is further configured to receive a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

40. The mobile terminal according to claim 39, wherein:

the resource allocation message received in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation,

the transmitter is configured to transmit, in response to the resource allocation message, the scheduling information to the network entity responsible for resource allocation via the scheduled shared channel, and

the receiver is configured to receive, in response to the transmission of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel.

41. The mobile terminal according to claim 39, the receiver is further configured to receive, in response to the resource request, a timing adjustment command from the network entity responsible for resource allocation, wherein the timing adjustment command is comprised in the resource allocation message received in response to the resource request.

42. The mobile terminal according to claim 41, wherein the mobile terminal is further configured to realign uplink timing according to the timing adjustment command prior to transmitting of scheduling information via the scheduled shared channel.

43. The mobile terminal according to claim 39, wherein the resource allocation message received in response to the resource request grants resources for transmitting data including user data via the scheduled shared channel.

44. A network entity responsible for resource allocation for use in a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, the network entity responsible for resource allocation comprising:

a receiver configured to receive a resource request from a mobile terminal via the contention-based channel, and

a transmitter configured to transmit, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel to the mobile terminal, wherein

the transmitter is further configured to transmit, a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

45. The network entity responsible for resource allocation according to claim 44, wherein:

the resource allocation message received in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation,

the receiver is configured to receive the scheduling information from the mobile station via the scheduled shared channel, and

the transmitter is configured to transmit, in response to the reception of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel to the network entity responsible for resource allocation.

46. The method according to claim 44, wherein the transmitter is further configured to transmit, in response to the resource request, a timing adjustment command to the mobile terminal, wherein the timing adjustment command is comprised in the resource allocation message transmitted to the mobile terminal in response to the resource request.

47. The network entity responsible for resource allocation according to claim 46, wherein the timing adjustment command is configured to cause the mobile terminal to realign uplink timing prior to the mobile terminal transmitting of scheduling information via the scheduled shared channel.

48. The network entity responsible for resource allocation according to claim 44, wherein the resource allocation message transmitted in response to the resource request grants resources to the mobile terminal for transmitting data including user dat via the scheduled shared channel.

49. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a mobile terminal, cause the mobile terminal to request resources for transmitting data on uplink within a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, by:

transmitting a resource request to a network entity responsible for resource allocation via the contention-based channel,

receiving, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel, and

receiving a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

50. The non-transitory computer-readable medium according to claim 49, wherein the resource allocation message received in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation and wherein the computer-readable medium further stores instructions that, when executed by the processor of the mobile terminal, cause the mobile terminal to:

transmit, in response to the resource allocation message, the scheduling information to the network entity responsible for resource allocation via the scheduled shared channel, and

receive, in response to the transmission of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel.

51. The non-transitory computer-readable medium according to claim 49, wherein the mobile terminal is further caused to receive, in response to the resource request, a timing adjustment command from the network entity responsible for resource allocation, wherein the timing adjustment command is comprised in the resource allocation message received in response to the resource request.

52. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a network entity responsible for resource allocation, cause the network entity responsible for resource allocation to allocate resources to a mobile terminal for transmitting data on uplink within a mobile communication system utilizing an uplink scheme comprising transmissions on a scheduled shared channel and a contention-based channel, by:

receiving a resource request from the mobile terminal via the contention-based channel,

transmitting, in response to the resource request, a resource allocation message granting resources for transmitting data via the scheduled shared channel to the mobile terminal, and

transmitting a trigger for repeatedly transmitting a reference signal to the network entity and information indicating a frequency bandwidth used for repeatedly transmitting the reference signal, the reference signal being a signal used for uplink channel estimation.

53. The non-transitory computer-readable medium according to claim 52, wherein the resource allocation message received in response to the resource request grants resources for transmitting the scheduling information to the network entity responsible for resource allocation and wherein the computer-readable medium further stores instructions that, when executed by the processor of the network entity responsible for resource allocation, cause the network entity responsible for resource allocation to:

receive the scheduling information from the mobile station via the scheduled shared channel, and

transmit, in response to the reception of the scheduling information, a second resource allocation message granting resources to the mobile terminal for transmitting user data on the scheduled shared channel to the network entity responsible for resource allocation.

54. The non-transitory computer-readable medium according to claim 52, wherein the network entity responsible for resource allocation is further caused to transmit, in response to the resource request, a timing adjustment command to the mobile terminal, wherein the timing adjustment command is comprised in the resource allocation message received in response to the resource request.