Contention based resource configuration method and apparatus

1. A contention based (CB) resource configuration method, the method comprising:

configuring, by a network device, a CB resource parameter, wherein the CB resource parameter comprises a number of CB resource blocks allocated in a single transmission time interval (TTI);

notifying, by the network device, a user equipment (UE) of the CB resource parameter;

allocating, by the network device, a CB resource according to the CB resource parameter;

notifying, by the network device, the UE of a grant of the CB resource after notifying the UE of the CB resource parameter;

detecting, by the network device, a probability of a conflict on the CB resource; and

re-configuring, by the network device in response to the conflict on the CB resource being greater than or equal to a first conflict probability threshold, the CB resource parameter, wherein the re-configuring comprises increasing the number of the CB resource blocks allocated in the single TTI in the CB resource parameter.

2. The method according to claim 1 , wherein allocating the CB resource comprises:

allocating, by the network device, the CB resource in a specific sub-frame;

wherein the specific sub-frame comprises a first sub-frame in an uplink frame from a relay station to a base station, or a second sub-frame in an uplink frame from the UE to the relay station; and

wherein the first sub-frame corresponds to a sub-frame that is not allowed to be set as a multimedia multicast/broadcast single frequency network (MBSFN) sub-frame in a downlink frame from the base station to the relay station, and the second sub-frame corresponds to an MBSFN sub-frame in the downlink frame from the base station to the relay station.

3. The method according to claim 1 , wherein the CB resource parameter further comprises any one or combination of the following: a period of a CB resource block, a frequency of the CB resource block, a size of the CB resource block, a modulation and coding scheme (MCS), and an expected reception power.

4. A contention based (CB) resource using method, the method comprising:

receiving, by a user equipment (UE) from a network device, a CB resource parameter, wherein the CB resource parameter comprises a number of CB resource blocks allocated in a single transmission time interval (TTI);

detecting, by the UE, a grant of a first CB resource according to the CB resource parameter after receiving the CB resource parameter, wherein the first CB resource is allocated according to the CB resource parameter;

using, by the UE, the first CB resource according to the grant; and

receiving, by the UE, a reconfigured CB resource parameter from the network device, and using a second CB resource allocated according to the reconfigured CB resource parameter to reduce a probability of a conflict on an allocated CB resource, wherein the CB resource parameter is reconfigured in response to the network device detecting a probability of a conflict on the CB resource and determining that the probability of a conflict on the CB resource is greater than or equal to a first conflict probability threshold, and wherein the CB resource parameter is reconfigured by increasing the number of CB resource blocks allocated in the single TTI in the CB resource parameter.

5. The method according to claim 4 , wherein:

detecting the grant of the first CB resource according to the CB resource parameter comprises:

blindly detecting, by the UE according to the number of CB resource blocks allocated in the single TTI, CB resource Grants of the number; and

using the first CB resource according to the grant comprises:

using, by the UE, the first CB resource according to the CB resource Grants.

6. The method according to claim 4 , wherein using, by the UE, the first CB resource comprises:

sending, by the UE, a buffer status report (BSR) or uplink data on the first CB resource.

7. The method according to claim 6 , wherein after the sending the BSR, the method further comprises:

receiving, by the UE, a feedback on the BSR from the network device;

when the feedback is correct reception, canceling, by the UE, a triggering state of the BSR; and

when the feedback is incorrect reception, maintaining, by the UE, the triggering state of the BSR, and waiting for retransmitting.

8. The method according to claim 4 , wherein using the CB resource comprises:

using, by the UE, the CB resource according to a use priority, wherein the use priority comprises one or any combination of first use priority, a second use priority and a third use priority, the first use priority is used for determining a priority level of a scheduling request (SR) resource and the first CB resource or a priority level of a random access channel (RACH) resource and the CB resource, the second use priority is used for determining a priority level of a BSR and uplink data, and the third use priority is used for determining a priority level among multiple CB resource blocks.

9. The method according to claim 4 , wherein the CB resource parameter further comprises any one or combination of the following: a period of a CB resource block, a frequency of the CB resource block, a size of the CB resource block, a modulation and coding scheme (MCS), and an expected reception power.

10. A network device, comprising:

a processor; and

a computer readable storage medium storing programming for execution by the processor, the programming including instructions to:

configure a contention based (CB) resource parameter, wherein the CB resource parameter comprises a number of CB resource blocks allocated in a single transmission time interval (TTI);

notify a user equipment (UE) of the CB resource parameter;

allocate a CB resource according to the CB resource parameter;

notify the UE of a grant of the CB resource after notifying the CB resource parameter;

detect a probability of a conflict on the CB resource; and

re-configure, in response to the conflict on the CB resource being greater than or equal to a first conflict probability threshold, the CB resource parameter, wherein the re-configuring comprises increasing the number of the CB resource blocks allocated in the single TTI in the CB resource parameter.

11. The network device according to claim 10 , wherein the CB resource is allocated in a specific sub-frame—wherein the specific sub-frame comprises a first sub-frame in an uplink frame from a relay station to a base station or a second sub-frame in an uplink frame from the UE to the relay station, and

wherein the first sub-frame corresponds to a sub-frame that is not allowed to be set as a multimedia multicast/broadcast single frequency network (MBSFN) sub-frame in a downlink frame from the base station to the relay station, and the second sub-frame corresponds to an MBSFN sub-frame in the downlink frame from the base station to the relay station.

12. The network device according to claim 10 , wherein the CB resource parameter is notified via a radio resource control (RRC) signaling layer or a media access control (MAC) signaling layer.

13. The network device according to claim 10 , wherein the CB resource parameter further comprises any one or combination of the following: a period of a CB resource block, a frequency of the CB resource block, a size of the CB resource block, a modulation and coding scheme (MCS), and an expected reception power.

14. A user equipment, comprising:

a processor; and

computer readable storage medium storing programming for execution by the processor, the programming including instructions to:

receive a CB resource parameter from a network device, wherein the CB resource parameter comprises a number of CB resource blocks allocated in a single transmission time interval (TTI);

detect a grant of a first CB resource according to the CB resource parameter after receiving the CB resource parameter, wherein the first CB resource is allocated according to the CB resource parameter;

use the first CB resource according to the grant; and

receive a reconfigured CB resource parameter from the network device and use a second CB resource allocated according to the reconfigured CB resource parameter to reduce a probability of a conflict on an allocated CB resource, wherein the CB resource parameter is reconfigured in response to the network device detecting a probability of a conflict on the CB resource and determining that the probability of a conflict on the CB resource is greater than or equal to a first conflict probability threshold, and wherein the CB resource parameter is reconfigured by increasing the number of CB resource blocks allocated in the single TTI in the CB resource parameter.

15. The user equipment according to claim 14 , wherein the instructions to use the first CB resource includes instructions to send a buffer status report (BSR) or uplink data on the first CB resource.

16. The user equipment according to claim 15 , wherein the programming further includes instructions to:

receive a feedback on the BSR from the network device;

cancel a triggering state of the BSR when the feedback is correct reception; and

maintain the triggering state of the BSR when the feedback is incorrect reception.

17. The user equipment according to claim 14 , wherein the instructions to use the first CB resource-comprises instructions to:

use the first CB resource according to a use priority, wherein the use priority comprises one or any combination of a first use priority, a second use priority and a third use priority, the first use priority is used for determining a priority level of a scheduling request (SR) resource and the first CB resource or a priority level of a random access channel (RACH) resource and the first CB resource, the second use priority is used for determining a priority level of a BSR and uplink data, and the third use priority is used for determining a priority level among multiple CB resource blocks.

18. The user equipment according to claim 14 , wherein the programming further includes instructions to:

when the CB resource parameter comprises a frequency or a period of the CB resource block, and uplink data arrives at the UE or a BSR is triggered, wake up from a sleep state in a discontinuous reception (DRX) mode according to the frequency or the period of the first CB resource block before using the CB resource for uplink transmission.

19. The user equipment according to claim 14 , wherein the CB resource parameter is received via a radio resource control (RRC) signaling layer or a media access control (MAC) signaling layer.

20. The user equipment according to claim 14 , wherein the CB resource parameter further comprises any one or combination of the following: a period of a CB resource block, a frequency of the CB resource block, a size of the CB resource block, a modulation and coding scheme (MCS), and an expected reception power.