Method and apparatus for data transmission in wireless local access network
An operation method of a first communication node in a communication network identifies a number of second communication nodes receiving messages in a first reception mode and a number of third communication nodes receiving messages in a second reception mode. A transmission mode is determined for transmitting a wireless access in vehicular environments service advertisement (WSA) message based on the identified numbers. A transmission period is then determined for transmitting the WSA message based on the transmission mode. The WSA message is transmitted based on the transmission mode and the transmission period. A protocol used for the first reception mode is different from a protocol used for the second reception mode.
1. An operation method of a first communication node in a communication network, comprising:
identifying, by a processor, a number of second communication nodes that receive messages in a first reception mode and a number of third communication nodes that receive messages in a second reception mode;
determining, by the controller, a transmission mode for transmitting a wireless access in vehicular environments service advertisement (WSA) message based on the identified numbers;
determining, by the controller, a transmission period for transmitting the WSA message based on the transmission mode; and
transmitting, by the controller, the WSA message based on the transmission mode and the transmission period,
wherein a protocol used for the first reception mode is different from a protocol used for the second reception mode.
2. The operation method according to claim 1 , wherein the WSA message further includes service information for the second communication nodes or service information for the third communication nodes.
3. The operation method according to claim 1 , wherein the transmission mode is determined as a first transmission mode when the second communication nodes exist in the communication network, the transmission mode is determined as a second transmission mode when the third communication nodes exist in the communication network, and the transmission mode is determined as a third transmission mode when the second communication nodes and the third communication nodes coexist in the communication network.
4. The operation method according to claim 3 , wherein the WSA message for the second communication nodes is transmitted during the transmission period, when the transmission mode is the first transmission mode.
5. The operation method according to claim 3 , wherein the WSA message for the third communication nodes is transmitted during the transmission period, when the transmission mode is the second transmission mode.
6. The operation method according to claim 3 , wherein the WSA message for the second communication nodes, the WSA message for the third communication nodes, and the WSA message for both of the second communication nodes and the third communication nodes are transmitted during the transmission period, when the transmission mode is the third communication node.
7. The operation method according to claim 6 , wherein the transmission period includes:
a first transmission period in which the WSA message for the second communication nodes is transmitted;
a second transmission period in which the WSA message for the third communication nodes is transmitted; and
a third transmission period in which the WSA message for both of the second communication nodes and the third communication nodes is transmitted,
wherein the first, second, and third periods are determined based on a number of the second communication nodes and a number of the third communication nodes.
8. The operation method according to claim 7 , wherein, when the number of the second communication nodes is m and the number of the third communication nodes is n, a ratio of the first, second, and third transmission periods is determined as m:n:(m+n).
9. The operation method according to claim 1 , wherein the WSA message is transmitted via a control channel (CCH).
10. A first communication node constituting a communication system, the first communication node including a processor and a memory configured to store at least one instruction executable by the processor, wherein when executed by the processor, the at least one instruction causes the processor to:
identify a number of second communication nodes that receive messages in a first reception mode and a number of third communication nodes that receive messages in a second reception mode;
determine a transmission mode for transmitting a wireless access in vehicular environments service advertisement (WSA) message based on the identified numbers;
determine a transmission period for transmitting the WSA message based on the transmission mode; and
transmit the WSA message based on the transmission mode and the transmission period,
wherein a protocol used for the first reception mode is different from a protocol used for the second reception mode.
11. The first communication node according to claim 10 , wherein the WSA message further includes service information for the second communication nodes or service information for the third communication nodes.
12. The first communication node according to claim 10 , wherein the transmission mode is determined as a first transmission mode when the second communication nodes exist in the communication network, the transmission mode is determined as a second transmission mode when the third communication nodes exist in the communication network, and the transmission mode is determined as a third transmission mode when the second communication nodes and the third communication nodes coexist in the communication network.
13. The first communication node according to claim 12 , wherein the WSA message for the second communication nodes is transmitted during the transmission period, when the transmission mode is the first transmission mode.
14. The first communication node according to claim 12 , wherein the WSA message for the third communication nodes is transmitted during the transmission period, when the transmission mode is the second transmission mode.
15. The first communication node according to claim 12 , wherein the WSA message for the second communication nodes, the WSA message for the third communication nodes, and the WSA message for both of the second communication nodes and the third communication nodes are transmitted during the transmission period, when the transmission mode is the third communication node.
16. The first communication node according to claim 15 , wherein the transmission period includes a first transmission period in which the WSA message for the second communication nodes is transmitted, a second transmission period in which the WSA message for the third communication nodes is transmitted, and a third transmission period in which the WSA message for both of the second communication nodes and the third communication nodes is transmitted, and the first, second, and third periods are determined based on a number of the second communication nodes and a number of the third communication nodes.
17. The first communication node according to claim 16 , wherein, when the number of the second communication nodes is m and the number of the third communication nodes is n, a ratio of the first, second, and third transmission periods is determined as m:n:(m+n).