Method and apparatus for obtaining mapping between random access parameter and resource

1. A method for obtaining a mapping between a random access parameter and a resource, comprising:

obtaining, by a user equipment, a random access parameter list, and obtaining a serial number of a parameter in the random access parameter list;

obtaining, by the user equipment, a resource list; and

obtaining, by the user equipment, the mapping between the random access parameter and a common enhanced dedicated channel (E-DCH) resource in the resource list according to the obtained serial number of the random access parameter and a total number of resources in the obtained resource list; and

sending, by the user equipment, a selected random access parameter to a network side device;

receiving, by the user equipment, from the network side device, a response which indicates whether the common E-DCH resource mapped with the selected random access parameter is available;

wherein the random access parameter list comprises a random access parameter in type 2 or in type 3 in a second system information block;

wherein obtaining the resource list comprises: obtaining a list of a 2 ms common E-DCH resource in a first system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Z, wherein:

X′ is a default common E-DCH resource index, Z is the total number of resources in the list of the 2 ms common E-DCH resource in the first system information block, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

2. The method according to claim 1 , wherein the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 1 in a second system information block; and a serial number of the random access parameter in the first system information block is smaller than a serial number of the random access parameter in type 1;

wherein obtaining the resource list comprises: obtaining a list of a common E-DCH resource corresponding to a cell-level transmission time interval (TTI) in the first system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises: obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X=SigInd mod Y, wherein:

X is a default common E-DCH resource index, Y is the total number of resources in the resource list, and SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

3. The method according to claim 1 , wherein the random access parameter list comprises a random access parameter in type 2 in a second system information block and a random access parameter in type 3 in the second system information block;

wherein obtaining the resource list comprises: obtaining a list of a 2 ms common E-DCH resource in a first system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Z, wherein:

X′ is a default common E-DCH resource index, Z is the total number of resources in the list of the 2 ms common E-DCH resource in the first system information block, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

4. The method according to claim 1 , further comprising: obtaining a corresponding serial number of the default common E-DCH resource in the first system information block by using a formula X=X′+concurrent TTI partition index, wherein X is the corresponding serial number of the default common E-DCH resource in the first system information block, and the Concurrent transmission time interval (TTI) partition index is a start serial number of the 2 ms common E-DCH resource in the first system information block.

5. The method according to claim 1 , wherein the random access parameter list comprises: a random access parameter in a first system information block, a random access parameter in type 1 in a second system information block, a random access parameter in type 2 in the second system information block, and a random access parameter in type 3 in the second system information block; or, the random access parameter list comprises a random access parameter in a first system information block, a random access parameter in type 2 in a second system information block, and a random access parameter in type 3 in the second system information block; or, the random access parameter list comprises only a random access parameter in type 1 in a second system information block; or, the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 2 in a second system information block; or, the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 3 in a second system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Y, wherein:

X′ is a default common E-DCH resource index, Y is the total number of resources in the resource list, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

6. The method according to claim 1 , wherein obtaining the random access parameter list comprises:

receiving a system broadcast message sent by a network side device, wherein the system broadcast message comprises a random access parameter; and

numbering, according to a sequence configured in the system broadcast message, the random access parameter serially, so as to obtain the random access parameter list.

7. The method according to claim 1 , wherein the first system information block is a system information block 5 (SIB5) and the second system information block is a system information block 22 (SIB22).

8. The method according to claim 1 , wherein obtaining the list of the 2 ms common E-DCH resource in the first system information block comprises:

obtaining a list of all resources in the first system information block, and obtaining the list of the 2 ms common E-DCH resource according to a start serial number of a 2 ms resource configured on the network side device.

9. An apparatus for obtaining a mapping between a random access parameter and a resource, comprising a processor and a memory including processor-executable instructions executed by the processor to perform operations comprising:

obtaining a random access parameter list, and obtaining a serial number of a parameter in the random access parameter list;

obtaining a resource list; and

obtaining the mapping between the random access parameter and a common enhanced dedicated channel (E-DCH) resource in the resource list according to the obtained serial number of the random access parameter and a total number of resources in the obtained resource list;

sending, a selected random access parameter to a network side device;

receiving, from the network side device, a response which indicates whether a common E-DCH resource mapped with the selected random access parameter is available;

wherein the random access parameter list comprises a random access parameter in type 2 or in type 3 in a second system information block;

wherein obtaining the resource list comprises: obtaining a list of a 2 ms common E-DCH resource in a first system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Z, wherein:

X′ is a default common E-DCH resource index, Z is the total number of resources in the list of the 2 ms common E-DCH resource in the first system information block, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

10. The apparatus according to claim 9 , wherein the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 1 in a second system information block; and a serial number of the random access parameter in the first system information block is smaller than a serial number of the random access parameter in type 1;

wherein obtaining the resource list comprises: obtaining a list of a common E-DCH resource corresponding to a cell-level transmission time interval TTI in the first system information block; and

wherein obtaining the mapping between the random access parameter and the E-DCH resource comprises: obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X=SigInd mod Y, wherein:

X is a default common E-DCH resource index, Y is the total number of resources in the resource list, and SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

11. The apparatus according to claim 9 , wherein the random access parameter list comprises a random access parameter in type 2 in a second system information block and a random access parameter in type 3 in the second system information block;

wherein obtaining the resource list comprises: obtaining a list of a 2 ms common E-DCH resource in a first system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Z, wherein:

X′ is a default common E-DCH resource index, Z is the total number of resources in the list of the 2 ms common E-DCH resource in the first system information block, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

12. The apparatus according to claim 9 , wherein the operations further comprise:

obtaining a corresponding serial number of the default common E-DCH common (E-DCH) resource in the first system information block by using a formula X=X′+concurrent TTI partition index, wherein X is the corresponding serial number of the default common E-DCH resource in the first system information block, and the Concurrent transmission time interval (TTI) partition index is a start serial number of the 2 ms common E-DCH resource in the first system information block.

13. The apparatus according to claim 9 , wherein the random access parameter list comprises: a random access parameter in a first system information block, a random access parameter in type 1 in a second system information block, a random access parameter in type 2 in the second system information block, and a random access parameter in type 3 in the second system information block; or, the random access parameter list comprises a random access parameter in a first system information block, a random access parameter in type 2 in a second system information block, and a random access parameter in type 3 in the second system information block; or, the random access parameter list comprises only a random access parameter in type 1 in a second system information block; or, the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 2 in a second system information block; or, the random access parameter list comprises a random access parameter in a first system information block and a random access parameter in type 3 in a second system information block; and

wherein obtaining the mapping between the random access parameter and the common E-DCH resource comprises:

obtaining the mapping between the random access parameter and the common E-DCH resource by using a formula X′=SigInd mod Y, wherein:

X′ is a default common E-DCH resource index, Y is the total number of resources in the resource list, SigInd is the serial number of the parameter in the random access parameter list, and mod is a modulo operation.

14. The apparatus according to claim 9 , wherein the operation of obtaining the random access parameter list specifically comprises:

receiving a system broadcast message sent by a network side device, wherein the system broadcast message comprises a random access parameter; and

numbering, according to a sequence configured in the system broadcast message, the random access parameter serially, so as to obtain the random access parameter list.

15. The apparatus according to claim 9 , wherein the first system information block is a system information block 5 (SIB5) and the second system information block is a system information block 22 (SIB22).

16. The apparatus according to claim 9 , wherein the operation of obtaining the list of the 2 ms common E-DCH resource in the first system information block comprises:

obtaining a list of all resources in the first system information block, and obtaining the list of the 2 ms common E-DCH resource according to a start serial number of a 2 ms resource configured on the network side device.