Method and device for allocating group resources for M2M device in wireless communication system
The present invention relates to wireless communication, and more specifically, to a method and a device for allocating group resources for a M2M device to which machine to machine (M2M) communication is applied in a wireless communication system. A method for allowing a machine to machine (M2M) device to be allocated with resources with resources in a wireless communication system comprises the steps of: receiving first information for identifying said M2M device from a base station; receiving, from said base station, group resource allocations, second information for identifying a first group to which said M2M device belongs, and third information for identifying said M2M device within said first group; and determining first group resource allocations corresponding to said second information from said group resource allocations, without using said first information, and then transmitting first data by using resource allocations corresponding to said third information from said first group resource allocations.
1. A method for allocating resources at a Machine to Machine (M2M) device in a wireless communication system, the method comprises:
receiving, by the M2M device from a base station, first information uniquely identifying the M2M device in the wireless communication system;
receiving, by the M2M device from the base station, a message including second information and third information, the second information identifying a specific group to which the M2M device belongs, and the third information indicating the M2M device within the specific group;
transmitting, by the M2M device to the base station, a bandwidth request (BR) when the third information of the M2M device has a smallest value within the specific group,
wherein, when the M2M device is configured to discard the first information, the bandwidth request includes the second information masked with the third information;
receiving, by the M2M device, group resource allocation information corresponding to the second information without using the first information; and
transmitting, by the M2M device, a first signal by using the group resource allocation information based on control information within the group resource allocation information, the control information corresponding to the third information.
2. The method of claim 1 , wherein the first information corresponds to a Station Identifier (STID), the second information corresponds to a group ID, and the third information corresponds to a user bitmap index.
3. The method of claim 1 , wherein the M2M device corresponds to a fixed device having no mobility.
4. The method of claim 1 , further comprising:
entering, by the M2M device, an idle mode after transmitting the first signal; and
when a paging group message is received from the base station, transmitting, by the M2M device, a Medium Access Control (MAC) address used in a previous network entry to the base station.
5. The method of claim 4 , further comprising:
transmitting, by the M2M device, a second signal to the base station by using the group resource allocation information.
6. A method for allocating resources at a base station in a wireless communication system, the method comprises:
transmitting, by the base station to a Machine to Machine (M2M) device, first information uniquely identifying the M2M device in the wireless communication system;
transmitting, by the base station to the M2M device, a message including second information and third information, the second information identifying a specific group to which the M2M device belongs, and the third information indicating the M2M device within the specific group;
receiving, by the base station from the M2M device, a bandwidth request (BR) when the third information of the M2M device has a smallest value within the specific group,
wherein, when the M2M device is configured to discard the first information, the bandwidth request includes the second information masked with the third information; and
transmitting, by the base station, group resource allocation information corresponding to the second information without using the first information,
wherein the M2M device is allocated with resources by using the group resource allocation information based on control information within the group resource allocation information, the control information corresponding to the third information.
7. The method of claim 6 , wherein the first information corresponds to a Station Identifier (STID), the second information corresponds to a group ID, and the third information corresponds to a user bitmap index.
8. The method of claim 6 , further comprising:
transmitting, by the base station, a paging group message to the M2M device;
receiving, by the base station, a Medium Access Control (MAC) address used in a previous network entry from the M2M device; and
determining, by the base station, whether or not the M2M device belongs to the specific group based on the received MAC address.
9. The method of claim 8 :
wherein, when the M2M device belongs to the specific group, the second information is transmitted to the M2M device.
10. A Machine to Machine (M2M) device being allocated with resources in a wireless communication system, the M2M device comprises:
a transceiver; and
a processor operatively connected to the transceiver and configured to:
receive, from a base station, first information uniquely identifying the M2M device in the wireless communication system;
receive, from the base station, a message including second information and third information, the second information identifying a specific group to which the M2M device belongs, and the third information indicating the M2M device within the specific group;
transmit, to the base station, a bandwidth request (BR) when the third information of the M2M device has a smallest value within the specific group,
wherein, when the M2M device is configured to discard the first information, the bandwidth request includes the second information masked with the third information;
receive group resource allocation information corresponding to the second information without using the first information; and
transmit a first signal by using the group resource allocation information based on control information within the group resource allocation information, the control information corresponding to the third information.
11. The M2M device of claim 10 , wherein the first information corresponds to a Station Identifier (STID), the second information corresponds to a group ID, and the third information corresponds to a user bitmap index.
12. The M2M device of claim 10 , wherein the M2M device corresponds to a fixed device having no mobility.
13. The M2M device of claim 10 , wherein the processor is further configured to
enter an idle mode when the first signal is transmitted, and
when a paging group message is received from the base station, transmit a Medium Access Control (MAC) address used in a previous network entry to the base station.
14. The M2M device of claim 13 , wherein, when the receiving module receives the second information from the base station, the processor is further configured to transmit a second signal to the base station by using the group resource allocation information.
15. A base station allocating resources in a wireless communication system, the base station comprises:
a transceiver; and
a processor operatively connected to the transceiver and configured to:
transmit, to a Machine to Machine (M2M) device, first information uniquely identifying the M2M device in the wireless communication system;
transmit, to the M2M device, a message including second information and third information, the second information identifying a specific group to which the M2M device belongs, and the third information indicating the M2M device within the specific group;
receive, from the M2M device, a bandwidth request (BR) when the third information of the M2M device has a smallest value within the specific group,
wherein, when the M2M device is configured to discard the first information, the bandwidth request includes the second information masked with the third information; and
transmit group resource allocation information corresponding to the second information without using the first information,
wherein the M2M device is allocated with resources by using the group resource allocation information based on control information within the group resource allocation information, the control information corresponding to the third information.
16. The base station of claim 15 , wherein the first information corresponds to a Station Identifier (STID), the second information corresponds to a group ID, and the third information corresponds to a user bitmap index.
17. The base station of claim 15 , wherein the processor is further configured to:
transmit a paging group message to the M2M device;
receive a Medium Access Control (MAC) address used in a previous network entry from the M2M device; and
determine whether or not the M2M device belongs to the specific group based on the received MAC address.
18. The base station of claim 17 , wherein, when the M2M device belongs to the specific group, the second information is transmitted to the M2M device.