CONFIGURATION OF MULTI-PERIODICITY SEMI-PERSISTENT SCHEDULING FOR TIME DIVISION DUPLEX OPERATION IN A PACKET-BASED WIRELESS COMMUNICATION SYSTEM

• US 20100182939A1
• Filed: 09/18/2009
• Published: 07/22/2010
• Est. Priority Date: 09/19/2008
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Han, Jing, Wang, Hai Ming, Malkamaki, Esa, Ojala, Jussi
• Granted Patent: US 8,160,014 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• 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:

providing user equipment configured to receive and transmit time division duplex (TDD) signals over a radio frequency air interface using a semi-persistent scheduling (SPS) allocation;

receiving an SPS allocation over the radio frequency air interface;

using an implicit rule to determine a delta value;

determining a periodicity for a multiple periodicity SPS allocation by using the delta value; and

forming a multi-periodicity sub-frame pattern to receive and transmit TDD packets over the air interface.

2. The method of claim 1, herein using the implicit rule further comprising:

determining from a TDD frame configuration defining uplink and downlink TDD sub-frames and a hybrid automatic retransmit request (HARQ) 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 TDD configuration which is one of a plurality of possible TDD configurations that may be selected;

determining from received parameters a selected HARQ process that is one of a plurality of possible HARQ 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 TDD configurations are between an integer value of 0 and an integer value of 6 and if the selected TDD configuration is determined to be 1, and the HARQ process is determined to be one selected from 1 and 3, the delta value is calculated to be one;

and if the HARQ process is determined to be one selected from 2 and 4, the delta value is determined to be minus one.

5. The method of claim 3, wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and if the selected TDD 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 TDD configurations are between an integer value of 0 and an integer value of 6 and if the selected TDD configuration is determined to be 3, and wherein the HARQ process is determined to be one selected from 1 and 2, the delta value is calculated to be 1;

and if the HARQ process is 3, the delta value is calculated to be one selected from 2 and minus 2 based on additional implicit rules.

7. The method of claim 3, wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and if the selected TDD configuration is determined to be 4, and wherein the HARQ 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 in the HARQ process is one selected from the values 1, 3 and 4, the delta value is 1.

8. An apparatus comprising:

a radio frequency transceiver for receiving and sending packets in frames using time division duplex (TDD) radio frequency signals over an air interface;

a processor configured to receive configuration information including an SPS allocation over the radio frequency air interface;

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

determine a periodicity for a multiple periodicity SPS allocation by using the delta value; and

form a multi-periodicity sub-frame pattern used to receive downlink TDD packets and transmit uplink TDD packets over the air interface.

9. The apparatus of claim 8 and the processor further comprising:

determine, from a TDD frame configuration defining uplink and downlink TDD sub-frames and from a hybrid automatic retransmit request (HARQ) 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 configured to determine further comprises:

form a periodic sub-frame pattern for a TDD frame to be used for packet communications over the air interface, wherein the implicit rule depends on the system frame number (SFN) where a semi-persistent schedule allocation begins.

11. The apparatus of claim 8, wherein the processor configured to determine the delta value further comprises:

determine a selected TDD configuration wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6, and if the TDD configuration is determined to be 1 selected from 0, 5 and 6, the calculated delta value is zero.

12. The apparatus of claim 8, wherein the processor configured to determine the delta value further comprises:

determine a selected TDD configuration wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and to determine if the selected TDD configuration is 1; and

determine if a hybrid autonomous retransmit request (HARQ) process in use is one selected from the values of 1 and 3;

if so, the circuitry calculates the delta value to be 1; and

determine if the HARQ process selected is one selected from the values 2 and 4, if so the delta value calculated is minus one.

13. The apparatus of claim 8 wherein the processor configured to determine the delta value further comprises:

determine a selected TDD configuration wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and to determine if the selected TDD configuration is 2; and

determine if a hybrid autonomous retransmit request (HARQ) process in use is 2;

if so, the circuitry calculates the delta value to be one selected from minus five and plus five, based on additional implicit rules.

14. The apparatus of claim 8 wherein the processor configured to determine the delta value further comprises:

determine a selected TDD configuration wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and to determine if the selected TDD configuration is 3; and

determine the HARQ process is determined to be one selected from 1 and 2, the delta value is determined to be 1; and

determine if the HARQ process is 3, the delta value is calculated to be one selected from 2 and minus 2 based on additional implicit rules.

15. The apparatus of claim 8, wherein the processor configured to calculate the delta value further comprises:

determine a selected TDD configuration wherein the possible TDD configurations are between an integer value of 0 and an integer value of 6 and to determine if the selected TDD configuration is 4; and

determine that the HARQ process in use is 2;

if so, the delta value is calculated to be one selected from 1 and minus 1 based on additional implicit rules; and

determine if the HARQ process in use is one selected from the values 1, 3 and 4;

if so, the calculated delta value is 1.

16. The apparatus of claim 8 and the processor further comprising:

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

17. The apparatus of claim 8, wherein the processor further configured to determine detects if an SPS allocation begins in an uplink sub-frame in a TDD frame that is the last sub-frame in a TDD frame period, and the circuit adapted to calculate delta calculates a delta value that is 1 minus the uplink sub-frame number in the TDD frame period.

18. The apparatus of claim 8 wherein the periodicity for a multiple periodicity SPS 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, and the processor further comprising to retransmit previously transmitted packets over the air interface in response to a received HARQ 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:

a plurality of radio frequency transceivers operating over an air interface, at least some of the radio frequency transceivers configured to support the use of uplink and downlink sub-frames within time division duplexed (TDD) frames for packet communications with user equipment devices;

one or more user equipment devices, comprising;

a radio frequency transceiver for receiving and sending packets in frames using time division duplex (TDD) radio frequency signals over the air interface;

a processor configured to receive configuration information including an SPS allocation from a transmitter over the radio frequency air interface;

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

determine from a TDD 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 TDD packets and transmit uplink TDD packets over the air interface.

21. A computer readable storage medium containing stored instructions that, when executed by a programmable receiver in a user equipment device adapted to transceive time division duplexed (TDD) packet frames as radio frequency signals over an air interface, cause the user equipment to perform the steps of:

receiving an SPS allocation from a transmitter over the radio frequency air interface;

using an implicit rule to determine a delta value;

determining a periodicity for a multiple periodicity SPS allocation by using the delta value; and

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