TTI adaptation in E-DCH

• US 9,019,883 B2
• Filed: 03/30/2012
• Issued: 04/28/2015
• Est. Priority Date: 04/01/2011
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kubota, Keiichi, Martin, Brian, Chen, Tao
• Primary Examiner(s): WONG, XAVIER S
• Application Number:
  US14/008,443
• Publication Number:
  US 20140016595A1
• Time in Patent Office: 1,124 Days
• Field of Search: 370/311, 370328-338, 370431-443
• US Class Current: 370/311
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

An apparatus, comprising at least one processor configured to dynamically change a timing parameter, such as a Transmission Timing Interval for an E-DCH resource for a second apparatus in a cell.

Claims

1. A network apparatus for a wireless network, the network apparatus being configured to communicate with wireless mobile terminals and to control communication of the wireless mobile terminals, and the network apparatus comprising at least one controller configured with a memory storing computer instructions to schedule a given wireless mobile terminal in a cell for a first common Enhanced Dedicated Channel (E-DCH) resource selected from a selection of common E-DCH resources available in the cell by:

including an information element in a System Information Block (SIB) that is SIB5 or SIB5bis, wherein the information element indicates what Absolute Grant Channel (AGCH) configuration parameters are to be used, the AGCH configuration parameters including for each AGCH a 2 ms transmission time interval (TTI) or a 10 ms TTI, and the information element further indicates the respective TTI and AGCH to be used for each of the selection of common E-DCH resources, wherein some of the common E-DCH resources have an AGCH with the 2 ms TTI, and others of the common E-DCH resources have an AGCH with the 10 ms TTI; and

without modifying the information element, selecting for and allocating to the given wireless terminal in the cell the first common E-DCH resource taking into account the respective TTI indicated for the first common E-DCH resource.

2. The network apparatus according to claim 1, the controller with the memory storing computer instructions being further configured to dynamically change between the 2 ms TTI and the 10 ms TTI for the given wireless mobile terminal by detecting and evaluating a change in a radio condition for the given wireless mobile terminal and scheduling and allocating a different second common E-DCH resource for the given wireless mobile terminal.

3. The network apparatus according to claim 1, wherein the AGCH for each of the selection of common E-DCH resources is indicated by an AGCH selector index.

4. The network apparatus according to claim 1, the controller with the memory storing computer instructions is further configured to receive a request for an allocation of a common E-DCH resource from the given wireless mobile terminal and in response thereto to detect and evaluate a radio condition for the given wireless mobile terminal and thereafter to allocate the first common E-DCH resource and corresponding AGCH taking into account the radio condition and suitability of the respective TTI indicated for the first common E-DCH resource for the radio condition.

5. The network apparatus according to claim 4, the controller with the memory storing computer instructions is further configured to detect and evaluate a change in the radio condition and to transmit a request to the given wireless mobile terminal to release the first common E-DCH resource and AGCH, and thereafter allocate to the given wireless mobile terminal a different second E-DCH resource and corresponding AGCH for which a different TTI is indicated.

6. The network apparatus according to claim 1, wherein the apparatus is a base station.

7. The network apparatus according to claim 1, wherein the apparatus is a network chipset.

8. The network apparatus according to claim 1, wherein the TTI indicated for use with the first common E-DCH resource allocated to the given wireless mobile terminal is 10 ms, and the controller with the memory storing computer instructions is configured to allocate to a different second wireless terminal, without modifying the information element, a second common E-DCH resource for which the TTI indicated for use is 2 ms.

14. The apparatus according to claim 1, wherein each respective TTI is indicated by an E-DCH TTI parameter which is provided for each entry in a corresponding common E-DCH resource configuration list of the information element.

9. A method for a network apparatus of a wireless network, the network apparatus being configured to communicate with wireless mobile terminals and to control communication of the wireless mobile terminals, the method comprising scheduling a given wireless mobile terminal in a cell for a first common Enhanced Dedicated Channel (E-DCH) resource selected from a selection of common EDCH resources available in the cell by:

including an information element in a System Information Block (SIB) that is SIB5 or SIB5bis, wherein the information element indicates what Absolute Grant Channel (AGCH) configuration parameters are to be used, the AGCH configuration parameters including for each AGCH a 2 ms transmission time interval (TTI) or a 10 ms TTI, and the information element further indicates the respective TTI and AGCH to be used for each of the selection of common E-DCH resources, wherein some of the common E-DCH resources have an AGCH with the 2 ms TTI, and others of the common E-DCH resources have an AGCH with the 10 ms TTI; and

without modifying the information element, selecting for and allocating to the given wireless mobile terminal in the cell the first common E-DCH resource taking into account the respective TTI indicated for the first common E-DCH resource.

10. The method according to claim 9, wherein the TTI indicated for use with the first common E-DCH resource is 10 ms, and the method further comprises allocating to a different second wireless terminal, without modifying the information element, a second common E-DCH resource for which the TTI indicated for use is 2 ms.

11. A non-transitory computer readable memory storing a computer program for a network apparatus of a wireless network, the network apparatus being configured to communicate with wireless mobile terminals and to control communication of the wireless mobile terminals, and the computer program comprising code which when executed on a data-processing system controls the network apparatus to schedule a given wireless mobile terminal in a cell for a first common Enhanced Dedicated Channel (E-DCH) resource selected from a selection of common E-DCH resources available in the cell by:

including an information element in a System Information Block (SIB) that is SIB5 or SIB5bis, wherein the information element indicates what Absolute Grant Channel (AGCH) configuration parameters are to be used, the AGCH configuration parameters including for each AGCH a 2 ms transmission time interval (TTI) or a 10 ms TTI, and the information element further indicating the respective TTI and AGCH to be used for each of the selection of common E-DCH resources, wherein some of the common E-DCH resources have an AGCH with the 2 ms TTI, and others of the common E-DCH resources have an AGCH with the 10 ms TTI; and

without modifying the information element, selecting for and allocating to the given wireless mobile terminal in the cell at least the first common E-DCH resource taking into account the respective TTI indicated for the first common E-DCH resource.

12. The non-transitory computer readable memory storing the computer program according to claim 11, wherein the TTI indicated for use with the first common E-DCH resource is 10 ms and the code, when executed on a data-processing system, further controls the network apparatus to allocate to a different second wireless terminal, without modifying the information element, a second common E-DCH resource for which the TTI indicated for use is 2 ms.

13. The non-transitory computer readable memory storing the computer program according to claim 11, wherein said computer readable memory is a local memory of the network apparatus.

15. A wireless mobile terminal, comprising at least one controller configured with a memory storing computer instructions, configured to use an allocated first and second common Enhanced Dedicated Channel (E-DCH) resource from a selection of common E-DCH resources available in a cell to determine a transmission time interval (TTI) and an associated Absolute Grant Channel (AGCH) of the respectively allocated common E-DCH resource by:

using an information element in a received System Information Block (SIB) that is SIB5 or SIB5bis, wherein the information element indicates what AGCH configuration parameters are to be used, the AGCH configuration parameters including for each AGCH a 2 ms TTI or a 10 ms TTI;

using the respectively indicated TTI and AGCH for the allocated first common E-DCH resource, wherein at least the first common E-DCH resource has an AGCH with the 2 ms TTI, and at least the second common E-DCH resource has an AGCH with the 10 ms TTI; and

thereafter

while the information element remains unmodified, dynamically changing the TTI in use by the wireless mobile terminal between the 2 ms TTI and the 10 ms TTI by signaling received from the network which allocates the second common E-DCH resource.