Access network device, user equipment, communications system, and communication method

1. An access network device, comprising:

a receiver, the receiver configured to receive high-speed adjustment capability information from a communication apparatus, wherein the high-speed adjustment capability information indicates that the communication apparatus has a capability of supporting a radio resource management (RRM) requirement that is suitable for a high-speed mobile communication environment;

at least one processor, the at least one processor configured to determine, according to the high-speed adjustment capability information, that the communication apparatus has the capability of supporting the RRM requirement that is suitable for the high-speed mobile communication environment, and generate requirement indication information, wherein the requirement indication information indicates usage of a measurement period in a current cell, wherein the measurement period is suitable for the high-speed mobile communication environment; and

a transmitter, the transmitter configured to transmit the requirement indication information to the communication apparatus, wherein in transmitting the requirement indication information, the transmitter is configured to:

transmit a radio resource control (RRC) dedicated signaling to the communication apparatus, wherein the RRC dedicated signaling carries the requirement indication information; or

transmit a system message to the communication apparatus, wherein the system message carries the requirement indication information.

2. The access network device according to claim 1 , wherein the requirement indication information comprises speed level information, the speed level information indicates a speed level of the high-speed mobile communication environment, and the speed level of the high-speed mobile communication environment enables the communication apparatus to determine whether the communication apparatus is in the high-speed mobile communication environment.

3. A communication apparatus, comprising:

a transmitter, the transmitter configured to transmit high-speed adjustment capability information to an access network device, wherein the high-speed adjustment capability information indicates that the communication apparatus has a capability of supporting a radio resource management (RRM) requirement that is suitable for a high-speed mobile communication environment;

a receiver, the receiver configured to receive requirement indication information from the access network device, wherein the requirement indication information indicates usage of a measurement period in a current cell, wherein the measurement period is suitable for the high-speed mobile communication environment, and wherein in receiving the requirement indication information, the receiver is configured to:

receive a radio resource control (RRC) dedicated signaling from the access network device, wherein the RRC dedicated signaling carries the requirement indication information; or

receive a system message from the access network device, wherein the system message carries the requirement indication information; and

at least one processor, the at least one processor configured to determine, according to the requirement indication information, to use the measurement period in the current cell.

4. The communication apparatus according to claim 3 , wherein the requirement indication information comprises speed level information, and the speed level information indicates a speed level of the high-speed mobile communication environment; and

wherein in determining to use the measurement period, the at least one processor is configured to determine, according to the speed level information, to use the measurement period.

5. The communication apparatus according to claim 3 , wherein the at least one processor is further configured to use the measurement period according to a preset RRM parameter suitable for the high-speed mobile communication environment.

6. A communication method performed by a communication apparatus, comprising:

transmitting high-speed adjustment capability information to an access network device, wherein the high-speed adjustment capability information indicates that the communication apparatus has a capability of supporting a radio resource management (RRM) requirement that is suitable for a high-speed mobile communication environment;

receiving requirement indication information from the access network device, wherein the requirement indication information indicates usage of a measurement period in a current cell, wherein the measurement period is suitable for the high-speed mobile communication environment, and wherein receiving the requirement indication information comprises:

receiving a radio resource control (RRC) dedicated signaling from the access network device, wherein the RRC dedicated signaling carries the requirement indication information; or

receiving a system message from the access network device, wherein the system message carries the requirement indication information; and

determining, according to the requirement indication information, to use the measurement period in the current cell.

7. The method according to claim 6 , wherein the requirement indication information comprises speed level information, and the speed level information indicates a speed level of the high-speed mobile communication environment; and wherein

the determining, according to the requirement indication information, to use the measurement period comprises:

determining, according to the speed level information, to use the measurement period.

8. The method according to claim 6 , wherein after determining to use the measurement period, the communication method further comprises:

using the measurement period according to a preset RRM parameter suitable for the high-speed mobile communication environment.