Resource Setting Control for Transmission Using Contention Based Resources

• US 20120182977A1
• Filed: 10/02/2009
• Published: 07/19/2012
• Est. Priority Date: 10/02/2009
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Hooli, Kari Juhani, Tiirola, Esa Tapani, Pajukoski, Kari Pekka
• Granted Patent: US 9,313,801 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

There is proposed a mechanism by means of which resources for a data transmission between a user equipment and a base transceiver station are set. For this purpose, a resource dedicated to the user equipment (like an SR resource) is combined with at least one contention based resource allocated to a contention based transmission by the user equipment (like a CB-PUSCH resource). The at least one contention based resource to be combined is selected by executing a mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources, and by determining an information identifying at least one resource element of the at least one contention based resource.

Claims

1. A method comprising

setting resources for a data transmission between a user equipment and a base transceiver station,

combining a resource dedicated to the user equipment with at least one contention based resource allocated to a contention based transmission by the user equipment,

wherein the combining comprises

selecting the at least one contention based resource to be combined by

executing a mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources, and

determining an information identifying at least one resource element of the at least one contention based resource.

2. The method according to claim 1, wherein

the resource dedicated to the user equipment comprises a scheduling request resource element transmitted via an uplink control channel, and

the at least one contention based resource comprises a contention based physical resource element allocated to the contention based transmission via an uplink shared channel.

3. The method according to claim 2, wherein

the information indicating a specific resource element dedicated to the user equipment is a scheduling request resource index, and

the information identifying the at least one resource element of the at least one contention based resource is a resource index of the contention based physical resource element.

4. The method according to claim 2, wherein

the information identifying the at least one resource element of the at least one contention based resource further comprises at least one of

a demodulation reference signal index, and

a temporary identification information for the user equipment included in a payload of the contention based transmission.

5. The method according to claim 1, wherein the mapping comprises

executing a pseudo-random calculation based on predetermined input parameters known to the user equipment and the base transceiver station.

6. The method according to claim 5, wherein

the predetermined input parameters comprises at least one of

a number representing an identification element of the user equipment,

a frame number, and

at least one preset numerical value.

7. The method according to claim 1, further comprising

defining a time window based on a transmission time for the resource dedicated to the user equipment,

wherein the time window is defined by setting a minimum delay threshold and a maximum delay threshold in relation to the transmission time for the resource dedicated to the user equipment,

wherein an access to the contention based resource is allowed only in the time window.

8. The method according to claim 1, wherein the method is executed in the user equipment,

wherein the method is executed by the user equipment in case data are to be transmitted in an uplink direction and the resource dedicated to the user equipment is to be used for obtaining uplink resources, wherein the user equipment transmits data by using the resource dedicated to the user equipment and at least a part of the data to be transmitted in the uplink direction by using the selected contention based resource.

9. The method according to claim 1, wherein the method is executed in the base transceiver station,

wherein the method further comprises

detecting for the resource dedicated to the user equipment in the data transmission from the user equipment,

wherein in case a positive indication regarding the resource dedicated to the user equipment is obtained, detecting for the contention based resource.

10. The method according to claim 9, further comprising

detecting whether a collision between transmissions from a plurality of user equipments at the contention based resource is present, on the basis of a detection result for a transmission using the resource dedicated to the user equipment and on the basis of the predetermined mapping rule, and if a collision is present

identifying a failed transmission,

determining the user equipment of the plurality of user equipments on the basis of the information identifying the at least one resource element of the at least one contention based resource and the information indicating the specific resource element dedicated to the user equipment.

11. The method according to claim 9, further comprising

executing an error detection and correction procedure based on data received with the contention based resource, and

in case a failed transmission is detected, identifying the user equipment sending the data being not correctly received on the basis of at least one of the information identifying the at least one resource element of the at least one contention based resource and the information indicating the specific resource element dedicated to the user equipment.

12. The method according to claim 11, wherein the error detection and correction procedure comprises a hybrid automatic repeat request procedure.

13. The method according to claim 1, further comprising

configuring at least one of a modulation and coding scheme parameter and a power control parameter for the transmission between the user equipment and the base transceiver station, wherein at least one of the parameters is individually set for each of a plurality of user equipments on the basis of control data received for the contention based resource selected for each user equipment.

27. A computer program product for a computer, comprising software code portions for performing the steps of claim 1 when said product is run on the computer.

28. A computer program product according to claim 27, wherein said computer program product comprises a computer-readable medium on which said software code portions are stored.

29. A computer program product according to claim 27, wherein said computer program product is directly loadable into the internal memory of the computer.

14. An apparatus comprising

a first processing portion configured to set resources for a data transmission between a user equipment and a base transceiver station,

a second processing portion configured to combine a resource dedicated to the user equipment with at least one contention based resource allocated to a contention based transmission by the user equipment,

wherein the second processing portion comprises a selector configured to select the at least one contention based resource to be combined,

a mapper configured to execute a mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources, and

a determiner configured to determine an information identifying at least one resource element of the at least one contention based resource.

15. The apparatus according to claim 14, wherein

the resource dedicated to the user equipment comprises a scheduling request resource element transmitted via an uplink control channel, and

the at least one contention based resource comprises a contention based physical resource element allocated to the contention based transmission via an uplink shared channel.

16. The apparatus according to claim 15, wherein

the information indicating a specific resource element dedicated to the user equipment is a scheduling request resource index, and

the information identifying the at least one resource element of the at least one contention based resource is a resource index of the contention based physical resource element.

17. The apparatus according to claim 15, wherein

the information identifying the at least one resource element of the at least one contention based resource further comprises at least one of

a demodulation reference signal index, and

a temporary identification information for the user equipment included in a payload of the contention based transmission.

18. The apparatus according to claim 14, wherein the mapper is further configured to

execute a pseudo-random calculation based on predetermined input parameters known to the user equipment and the base transceiver station.

19. The apparatus according to claim 18, wherein

the predetermined input parameters comprises at least one of

a number representing an identification element of the user equipment,

a frame number, and

at least one preset numerical value.

20. The apparatus according to claim 14, further comprising

a third processing portion configured to define a time window based on a transmission time for the resource dedicated to the user equipment,

wherein the time window is defined by setting a minimum delay threshold and a maximum delay threshold in relation to the transmission time for the resource dedicated to the user equipment,

wherein an access to the contention based resource is allowed only in the time window.

21. The apparatus according to claim 14, wherein the apparatus is comprised in the user equipment wherein in case data are to be transmitted in an uplink direction by the user equipment and the resource dedicated to the user equipment is to be used for obtaining uplink resources, the apparatus is configured to set resources for the transmission of the data to be transmitted in the uplink direction at the user equipment, and the user equipment transmits, on the basis of the set resources, data by using the resource dedicated to the user equipment and at least a part of the data to be transmitted in the uplink direction by using the selected contention based resource.

22. The apparatus according to claim 14, wherein the apparatus is comprised the base transceiver station

wherein the apparatus further comprises

a detector configured to detect for the resource dedicated to the user equipment in the data transmission from the user equipment, wherein in case a positive indication regarding the resource dedicated to the user equipment is obtained, the detector is configured to detect for the contention based resource.

23. The apparatus according to claim 22, further comprising a detector configured to detect whether a collision between transmissions from a plurality of user equipments at the contention based resource is present, on the basis of a detection result for a transmission using the resource dedicated to the user equipment and on the basis of the predetermined mapping rule, and

an identifier configured to identify a failed transmission if a collision is present, and

a determiner configured to determine the user equipment of the plurality of user equipments on the basis of the information identifying the at least one resource element of the at least one contention based resource and the information indicating the specific resource element dedicated to the user equipment.

24. The apparatus according to claim 22, further comprising

a fourth processing portion configured to execute an error detection and correction procedure based on data received with the contention based resource, and

an identifier configured to identify, in case a failed transmission is detected, the user equipment sending the data being not correctly received on the basis of at least one of the information identifying the at least one resource element of the at least one contention based resource and the information indicating the specific resource element dedicated to the user equipment.

25. The apparatus according to claim 24, wherein fourth processing portion is configured to execute a hybrid automatic repeat request procedure as the error detection and correction procedure.

26. The apparatus according to claim 14, further comprising

a fifth processing portion configured to configure at least one of a modulation and coding scheme parameter and a power control parameter for the transmission between the user equipment and the base transceiver station, wherein the parameter is individually set for each of a plurality of user equipments on the basis of control data received for the contention based resource selected for each user equipment.