Configuration of multi-periodicity semi-persistent scheduling for time division duplex operation in a packet-based wireless communication system

• US 8,160,014 B2
• Filed: 09/18/2009
• Issued: 04/17/2012
• Est. Priority Date: 09/19/2008
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Ojala, Jussi, Wang, Hai Ming, Malkamaki, Esa, Han, Jing
• Primary Examiner(s): NGUYEN, STEVEN H D
• Application Number:
  US12/563,016
• Publication Number:
  US 20100182939A1
• Time in Patent Office: 942 Days
• Field of Search: 370/336, 370/329, 370/328, 370/321, 370/395, 455/427, 455/452, 455/426, 455/101
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0042 intra-user or intra-terminal allocation
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

Systems and methods for determining the periodicity for a multiple periodicity SPS allocation using implicit rules for a TDD communications system are disclosed. A communication terminal such as a UE is provided that may determine the periodicity for a multiple periodicity SPS allocation using implicit rules to calculate a delta value to form a long time period and a shorter time period, forming a periodic pattern where the rules depend on the TDD configuration being used. In another embodiment a communication terminal such as a UE is provided that may determine the periodicity for a multiple periodicity SPS allocation using implicit rules to calculate a delta value to form a long time period and a shorter time period forming a periodic pattern, where the rules depend on the TDD configuration being used and the HARQ process being used.

Claims

1. A method, comprising:

receiving a semi-persistent scheduling allocation;

determining a delta value by using an implicit rule;

determining a periodicity for a multiple periodicity semi-persistent scheduling allocation by using the delta value; and

forming a multi-periodicity sub-frame pattern to receive and transmit time division duplex packets.

2. The method of claim 1, wherein using the implicit rule further comprises:

determining from a time division duplex frame configuration defining uplink and downlink time division duplex sub-frames and a hybrid automatic retransmit request process, one implicit rule to use from a plurality of possible implicit rules; and

determining the delta value based on the one implicit rule.

3. The method of claim 1, wherein using the implicit rule to calculate the delta value further comprises:

determining from received parameters a selected time division duplex configuration which is one of a plurality of possible time division duplex configurations that may be selected;

determining from received parameters a selected HARQ process that is one of a plurality of possible hybrid automatic retransmit request processes that may be selected; and

performing a selection of a corresponding delta value based on the implicit rule.

4. The method of claim 3, wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and if the selected time division duplex configuration is determined to be 1, and the hybrid automatic retransmit request process is determined to be one selected from 1 and 3, the delta value is calculated to be one;

and if the hybrid automatic retransmit request process is either 2 or 4, the delta value is determined to be minus one.

5. The method of claim 3, wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and if the selected time division duplex configuration is determined to be 2, the delta value is determined to be minus five or plus five, based on additional implicit rules.

6. The method of claim 3, wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and if the selected time division duplex configuration is determined to be 3, and wherein the hybrid automatic retransmit request process is determined to be either 1 or 2, the delta value is calculated to be 1;

and if the hybrid automatic retransmit request process is 3, the delta value is calculated to be either 2 or minus 2 based on additional implicit rules.

7. The method of claim 3, wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and if the selected time division duplex configuration is determined to be 4, and the hybrid automatic retransmit request process is determined to 2, the delta value is calculated to be one selected from 1 and minus 1 based on additional implicit rules;

and further if the hybrid automatic retransmit request process is 1, 3, or 4, the delta value is 1.

8. An apparatus comprising:

a processor configured to;

receive configuration information including a semi-persistent scheduling allocation;

determine a delta value using an implicit rule stored within a user equipment;

determine a periodicity for a multiple periodicity semi-persistent scheduling allocation by using the delta value; and

form a multi-periodicity sub-frame pattern used to receive downlink time division duplex packets and transmit uplink time division duplex packets.

9. The apparatus of claim 8 wherein the processor is further configured to:

determine, from a time division duplex frame configuration defining uplink and downlink time division duplex sub-frames and from a hybrid automatic retransmit request process, one implicit rule to use from a plurality of possible implicit rules; and

determine the delta value based on the one implicit rule.

10. The apparatus of claim 8, wherein the processor is further configured to:

form a periodic sub-frame pattern for a time division duplex frame to be used for packet communications, wherein the implicit rule depends on the system frame number where a semi-persistent schedule allocation begins.

11. The apparatus of claim 8, wherein determining the delta value further comprises:

determining a selected time division duplex configuration wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6, and if the TDD configuration is determined to be 0, 5, or 6, the calculated delta value is zero.

12. The apparatus of claim 8, wherein determining the delta value further comprises:

determining a selected time division duplex configuration wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and determining if the selected time division duplex configuration is 1; and

if a hybrid autonomous retransmit request process in use is 1 or 3, calculating the delta value to be 1; and

if the hybrid autonomous retransmit request process selected is 2 or 4, calculating the delta value to be minus 1.

13. The apparatus of claim 8 wherein determining the delta value further comprises:

determining a selected time division duplex configuration wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and determining if the selected time division duplex configuration is 2; and

if a hybrid autonomous retransmit request process in use is 2, calculating the delta value to be 5 or +5, based on additional implicit rules.

14. The apparatus of claim 8 wherein determining the delta value further comprises:

determining a selected time division duplex configuration wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and determining if the selected time division duplex configuration is 3; and

if the hybrid autonomous retransmit request process is 1 or 2, determining the delta value to be 1; and

if the hybrid autonomous retransmit request process is 3, calculating the delta value to be 2 or −

2 based on additional implicit rules.

15. The apparatus of claim 8, wherein determining the delta value further comprises:

determining a selected time division duplex configuration wherein the possible time division duplex configurations are between an integer value of 0 and an integer value of 6 and determining if the selected TDD configuration is 4; and

if the hybrid autonomous retransmit request process in use is 2, calculating the delta value to be 1 or −

1 based on additional implicit rules; and

if the hybrid autonomous retransmit request process in use is 1, 3 or 4, calculating the delta value to be 1.

16. The apparatus of claim 8, wherein the processor is further configured to:

determine that the SPS allocation begins in an uplink sub-frame in the time division duplex frame, and the uplink sub-frame is not the last in a time division duplex frame period.

17. The apparatus of claim 8, wherein if semi-persistent scheduling allocation begins in an uplink sub-frame in a time division duplex frame that is the last sub-frame in a time division duplex frame period, a delta value is calculated that is 1 minus the uplink sub-frame number in the time division duplex frame period.

18. The apparatus of claim 8 wherein the periodicity for a multiple periodicity semi-persistent scheduling allocation comprises a first time period and a second time period, and the first time period is determined by adding the delta value to a nominal value for the time period, and the second time period is determined by subtracting a delta value from the nominal value time period.

19. The apparatus of claim 8, wherein the processor is further configured to retransmit previously transmitted packets over the air interface in response to a received hybrid autonomous retransmit request process request using the first and second time periods, wherein a collision between a retransmit packet and a newly received packet is prevented by the implicit rule.

20. A system comprising:

one or more user equipment devices, comprising;

a processor configured to;

cause an apparatus to receive configuration information including a semi-persistent scheduling allocation from a transmitter;

determine the frame periodicity for a multiple periodicity semi-persistent scheduling allocation to calculate a delta value using an implicit rule stored within the user equipment;

determine from a time division duplex configuration in use by the transmitter a first time period and determining a second time period, by using the delta value; and

form a periodic sub-frame pattern used to receive downlink time division duplex packets and transmit uplink time division duplex packets.

21. A non-transitory computer readable storage medium containing stored instructions that, when executed by a programmable receiver in a user equipment device, cause the user equipment to perform the steps of:

receiving a semi-persistent scheduling allocation from a transmitter over an air interface;

using an implicit rule to determine a delta value;

determining a periodicity for a multiple periodicity semi-persistent scheduling allocation by using the delta value; and

forming a multi-periodicity sub-frame pattern used to receive and transmit time division duplex packets over the air interface.