Method and user equipment for requesting common information from an access node
View Patent ↗Disclosed are a data transmission method, device, and system, which are used for resolving the problem of large overhead if an existing manner of sending a public message periodically is used in an ultra-dense network. The method comprises: user equipment sends an uplink request message, the uplink request message being used for requesting for obtaining public information of a first access node in an area in which the user equipment is located; and the user equipment receives the public information sent by the first access node. Because an access node in an area in which user equipment is located does not need to broadcast and send public information periodically, the access node can send, based on an uplink request of the user equipment, the public information, thereby improving the resource utilization and reducing the energy consumption.
1. A method for transmitting data, comprising:
transmitting, by a user equipment, an uplink request message, wherein the uplink request message requests common information of a first access node in an area where the user equipment is located; and
receiving, by the user equipment, the common information transmitted by the first access node; wherein
the user equipment is in a connected state, a second access node provides the user equipment with a communication service, and the user equipment currently resides in a coverage area of the first access node; and before the user equipment transmits the uplink request message, the method further comprises:
receiving, by the user equipment, control signaling transmitted by the second access node, wherein the control signaling instructs the user equipment to initiate an uplink request;
wherein the second node transmits the control signaling to the user equipment upon determining that at least one trigger condition is satisfied, and the at least one trigger condition comprises:
the second access node determining that it cannot satisfy a traffic transmission demand of the user equipment, or
the second access node receiving a report message indicating that the user equipment resides in the coverage area of the first access node from the first access node;
in response to the user equipment is in the connected state, the second access node provides the user equipment with the communication service, and the user equipment currently resides in the coverage area of the first access node, transmitting, by the user equipment, the uplink request message comprises:
transmitting, by the user equipment, the uplink request message according to preset configuration information; or
transmitting, by the user equipment, the uplink request message according to configuration information in common information transmitted by the second access node; or
transmitting, by the user equipment, the uplink request message according to configuration information carried in the control signaling;
wherein the configuration information comprises: a time-frequency resource for transmitting an uplink request, and parameter information to be used in transmitting the uplink request;
wherein the uplink request message is transmitted via a message Msg1, wherein the message Msg1 is a first message in a random access procedure with contention, used to request common information of the first access node in the area where the user equipment is located, and used to request an uplink grant and synchronization.
2. The method according to claim 1 , wherein receiving, by the user equipment, the common information transmitted by the first access node comprises:
receiving, by the user equipment, the common information transmitted by the first access node over a preset time-frequency resource; or
receiving, by the user equipment, the common information transmitted by the first access node over a time-frequency resource scheduled by the first access node.
3. The method according to claim 1 , wherein in response to the user equipment is in the connected state, the second access node provides the user equipment with the communication service, and the user equipment currently resides in the coverage area of the first access node, receiving, by the user equipment, the common information transmitted by the first access node comprises:
receiving, by the user equipment, the common information transmitted by the first access node over a preset time-frequency resource; or
receiving, by the user equipment, the common information transmitted by the first access node over a time-frequency resource scheduled by the first access node; or
receiving, by the user equipment, the common information transmitted by the first access node over a time-frequency resource scheduled by the second access node.
4. The method according to claim 1 , wherein receiving, by the user equipment, the common information transmitted by the first access node comprises:
receiving, by the user equipment, the common information transmitted by the first access node via dedicated signaling; or
receiving, by the user equipment, the common information transmitted by the first access node via a message Msg2; or
receiving, by the user equipment, the common information transmitted by the first access node via a message Msg4;
wherein the message Msg2 is a second message in a random access procedure with contention, and the message Msg4 is a fourth message in the random access procedure with contention.
5. The method according to claim 1 , wherein the uplink request message comprises identification information identifying a type of common information requested by the user equipment.
6. A user equipment, comprising:
a receiver, a transmitter, a processor, and a memory, wherein:
the transmitter is configured to transmit an uplink request message, wherein the uplink request message requests common information of a first access node in an area where the user equipment is located;
the receiver is configured to receive the common information transmitted by the first access node; and
the memory is configured to store data to be used by the processor in performing operations; wherein
the user equipment is in a connected state, a second access node provides the user equipment with a communication service, and the user equipment currently resides in a coverage area of the first access node; and before the transmitter transmits the uplink request message, the receiver is further configured to:
receive control signaling transmitted by the second access node, wherein the control signaling instructs the user equipment to initiate an uplink request;
wherein the second node transmits the control signaling to the user equipment upon determining that at least one trigger condition is satisfied, and the at least one trigger condition comprises:
the second access node determining that it cannot satisfy a traffic transmission demand of the user equipment, or
the second access node receiving a report message indicating that the user equipment resides in the coverage area of the first access node from the first access node;
in response to the user equipment is in the connected state, the second access node provides the user equipment with the communication service, and the user equipment currently resides in the coverage area of the first access node, the transmitter is further configured to:
transmit the uplink request message according to preset configuration information; or
transmit the uplink request message according to configuration information in common information transmitted by the second access node; or
transmit the uplink request message according to configuration information carried in the control signaling;
wherein the configuration information comprises: a time-frequency resource for transmitting an uplink request, and parameter information to be used in transmitting the uplink request;
the transmitter is configured to transmit an uplink request message via a message Msg1, wherein the message Msg1 is a first message in a random access procedure with contention, used to request for common information of the first access node in the area where the user equipment is located, and used to request an uplink grant, and synchronization.