HARQ process restriction and transmission of non-scheduled control data via uplink channels

• US 20070047451A1
• Filed: 07/21/2006
• Published: 03/01/2007
• Est. Priority Date: 07/25/2005
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Lohr, Joachim, Iochi, Hitoshi
• Granted Patent: US 7,447,504 B2
• Time in Patent Office: Days
• US Class Current: 370/242
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements

Abstract

The present invention relates to a method and mobile terminal for performing a data allocation process for scheduled data, non-scheduled user data and non-scheduled control data obeying restrictions on the resource utilization defined by a scheduling grant and at least one non-scheduled grant. Further, the invention relates to a method for transmitting control signaling from a network entity in a radio access network of a mobile communication system controlling the radio resources of mobile terminals to at least one of said mobile terminal and the network entity in a radio access network. In order to reduce the delays to control signaling implied by a conventional HARQ process restriction mechanism the present invention suggests a new categorization of uplink data into scheduled data, non-scheduled user data and non-scheduled control data and a new HARQ process restriction mechanism disabling certain HARQ processes for non-scheduled user data only.

Claims

1. A method for performing a data allocation process for scheduled data, non-scheduled user data and non-scheduled control data obeying restrictions on the resource utilization defined by a non-scheduled grant, wherein a non-scheduled grant indicates the maximum amount of resources a mobile terminal is allowed to utilize for transmitting non-scheduled data on the uplink channel within a transmission time interval, the method comprising:

restricting a non-scheduled grant to a subset of a plurality of HARQ processes thereby activating the HARQ processes of said subset for transmitting non-scheduled user data, whereby the restriction deactivates the remaining HARQ processes of the plurality of HARQ process for transmitting non-scheduled user data and does not deactivate said remaining HARQ processes for transmitting non-scheduled control data,

multiplexing non-scheduled user data and non-scheduled control data to a packet data unit of a transport channel for transmission on the uplink channel using one of the plurality of HARQ processes according to the non-scheduled grant thereby taking into account whether the HARQ process is active for the transmission of non-scheduled user data, and

providing the packet data unit for transmission on the uplink channel in the next transmission time interval to the HARQ process.

2. The method according to claim 1, wherein the non-scheduled control data is multiplexed to the packet data unit provided to the HARQ process, even if said HARQ process has been deactivated for transmitting non-scheduled user data.

6. The method accord to claim 1, wherein non-scheduled control data comprises data for scheduling related control signaling or data for MAC framing header signaling.

7. The method according to claim 1, wherein a non-scheduled grant indicates the maximum amount of resources the mobile terminal is allowed to utilize for transmitting non-scheduled user data and non-scheduled control data.

8. The method according to claim 7, wherein the non-scheduled control data is multiplexed to the packet data unit provided to the HARQ process, even the non-scheduled grant grants an amount of resources for the transmission of non-scheduled data not sufficient to transmit the non-scheduled control data.

9. The method according to claim 1, further comprising allocating a separate non-scheduled grant indicating the maximum amount of resources the mobile terminal is allowed to utilize for the transmission of non-scheduled control data.

10. The method according to claim 9, wherein the amount of resources indicated by said separate non-scheduled grant is always defined or assumed to be sufficiently large to allow for the transmission of the non-scheduled control data in the HARQ process to be used in the next transmission time interval.

11. The method according to claim 1, further comprising receiving control signaling from a network entity controlling the radio resource of the mobile terminal comprising an information element indicating the restriction of a non-scheduled grant to a subset of a plurality of HARQ processes, and

wherein the mobile terminal restricts the non-scheduled grant to a subset of a plurality of HARQ processes according to the control signaling.

12. The method according to claim 1, wherein the maximum amount of resources indicated by a non-scheduled grant is indicated by the amount of data the mobile terminal is allowed to utilize for transmitting non-scheduled data on the uplink channel within a transmission time interval.

13. The method according to claim 1, wherein the maximum amount of resources indicated by the scheduling grant is indicated by a power ratio between the enhanced dedicated physical data channel E-DPDCH and the dedicated physical control channel DPCCH.

14. The method according to claim 1, further comprising receiving a scheduling grant and at least one of a non-scheduled grant by the mobile terminal from a radio access network of the mobile communication system or is set by the mobile terminal.

3. A method for performing a data allocation process for scheduled data, non-scheduled user data and non-scheduled control data obeying restrictions on the resource utilization defined by a scheduling grant and at least one non-scheduled grant, wherein the scheduling grant and a non-scheduled grant indicates the maximum amount of resources a mobile terminal in a wireless communication system is allowed to utilize for transmitting scheduled data, non-scheduled data on an uplink channel within a transmission time interval, respectively, the method comprising:

defining a non-scheduled grant to be valid for a subset of a plurality of HARQ processes, wherein the HARQ processes of said subset are activated for the transmission of non-scheduled user data, while the remaining HARQ processes for which the non-scheduled grant is invalid are deactivated for the transmission of non-scheduled user data,

for a next transmission time interval, multiplexing scheduled data, non-scheduled user data and non-scheduled control data pending for uplink transmission to a packet data unit of a transport channel for transmission on the uplink channel within the next transmission time interval using one of the plurality of HARQ processes,

wherein the scheduled data, the non-scheduled user data and the non-scheduled control data pending for uplink transmission are multiplexed according to the scheduling grant and the corresponding non-scheduled grant thereby taking into account whether a non-scheduled grant has been defined valid or invalid for the HARQ process to be used in the next transmission time interval, and

providing the packet data unit to the HARQ process on the uplink channel in the next transmission time interval,

wherein the HARQ process to be used in the next transmission time interval is always assumed to be activated for the transmission of non-scheduled control data.

4. The method according to claim 3, wherein non-scheduled control data is multiplexed to the packet data unit provided to the HARQ process, even if said HARQ process is deactivated for a non-scheduled grant.

5. The method according to claim 3, wherein non-scheduled control data is multiplexed to the packet data unit provided to the HARQ process, even if a non-scheduled grant is invalid for said HARQ process.

15. A mobile terminal for use in a wireless communication system adapted to perform a data allocation process for non-scheduled user data and non-scheduled control data obeying restrictions on the resource utilization defined by a non-scheduled grant, wherein a non-scheduled grant indicates the maximum amount of resources the mobile terminal is allowed to utilize for transmitting non-scheduled data on the uplink channel within a transmission time interval, the terminal comprising:

a processing unit operable to restrict a non-scheduled grant to a subset of a plurality of HARQ processes thereby activating the HARQ processes of said subset for transmitting non-scheduled user data, whereby the restriction deactivates the remaining HARQ processes of the plurality of HARQ process for transmitting non-scheduled user data and does not deactivate said remaining HARQ processes for transmitting non-scheduled control data, and

a multiplexer operable to multiplex non-scheduled user data and non-scheduled control data to a packet data unit of a transport channel for transmission on the uplink channel using one of the plurality of HARQ processes according to the non-scheduled grant thereby taking into account whether the HARQ process to be used in the next transmission time interval is active for the transmission of non-scheduled user data, and

wherein the multiplexer is operable to provide the packet data unit for transmission on the uplink channel to the HARQ process.

16. A computer readable medium storing instructions that, when executed by a processor of a mobile terminal, cause the mobile terminal to perform a data allocation process for scheduled data, non-scheduled user data and non-scheduled control data obeying restrictions on the resource utilization defined by a scheduling grant and at least one non-scheduled grant, wherein the scheduling grant and a non-scheduled grant indicates the maximum amount of resources a mobile terminal in a wireless communication system is allowed to utilize for transmitting scheduled data, non-scheduled data on an uplink channel within a transmission time interval, respectively, wherein the mobile terminal is caused to perform said data allocation process by:

defining a non-scheduled grant to be valid for a subset of a plurality of HARQ processes, wherein the HARQ processes of said subset are activated for the transmission of non-scheduled user data, while the remaining HARQ processes for which the non-scheduled grant is invalid are deactivated for the transmission of non-scheduled user data,

for a next transmission time interval, multiplexing scheduled data, non-scheduled user data and non-scheduled control data pending for uplink transmission to a packet data unit of a transport channel for transmission on the uplink channel within the next transmission time interval using one of the plurality of HARQ processes,

wherein the scheduled data, the non-scheduled user data and the non-scheduled control data pending for uplink transmission are multiplexed according to the scheduling grant and the corresponding non-scheduled grant thereby taking into account whether a non-scheduled grant has been defined valid or invalid for the HARQ process to be used in the next transmission time interval, and

providing the packet data unit to the HARQ process on the uplink channel in the next transmission time interval,

wherein the HARQ process to be used in the next transmission time interval is always assumed to be activated for the transmission of non-scheduled control data.

17. A method for transmitting control signaling from a network entity in a radio access network of a mobile communication system controlling the radio resources of mobile terminals to at least one of said mobile terminal, the method comprising:

choosing a subset of a plurality of HARQ processes utilized for receiving non-scheduled user data and non scheduled control data from one of the mobile terminals according to a non-scheduled grant,

wherein the HARQ processes of said chosen subset are to be utilized for the transmission of non-scheduled control data from said one mobile terminal to the radio access network via an uplink channel,

generating control signaling information indicating the HARQ processes to of said subset to be activated for the transmission of non-scheduled control data to the radio access network, and

transmitting said control signaling information to said one mobile terminal.

18. The method according to claim 17, wherein the control signaling information is comprised within an information element of a signaling message transmitted to said one mobile terminal setting up or reconfiguring the uplink channel.

19. The method according to claim 17, wherein the signaling information comprises a sequence of bits, the number of bits in said sequence of bits being equivalent to the number of available HARQ processes, wherein the logical value of a respective one of said bits in said sequence indicates to said one mobile terminal whether a corresponding HARQ process is activated or deactivated for the transmission of non-scheduled control data on the uplink channel.