Enhancing handover performance using radio resource control diversity
A base station for a mobile telecommunications system has circuitry, which is configured to communicate with at least one user equipment and at least another base station. The circuitry is further configured to configure a radio resource control message for radio resource control diversity, and transmit the configured radio resource control message to the user equipment or to receive a configured radio resource control message from the user equipment and the at least another base station.
1 . A base station for a mobile telecommunications system comprising:
circuitry configured to
communicate with at least one user equipment and at least another base station,
configure a radio resource control message for radio resource control diversity;
transmit the configured radio resource control message to the user equipment or receive a configured radio resource control message for radio resource control diversity communication from the user equipment and the at least another base station;
transmit to the user equipment and the at least another base station a notification of a diversity set including base stations to be used for radio resource control diversity communication, the diversity set including an uplink diversity set and a downlink diversity set that is determined separately from the uplink diversity set; and
transmit the configured radio resource control message repeatedly in response to receipt of a predetermined message from the user equipment.
2 . The base station of claim 1 , wherein the radio resource control message is associated with at least one of: handover, radio resource control establishment, radio resource control re-establishment, radio resource control connection suspend and radio resource control connection resume.
3 . The base station of claim 1 , wherein the circuitry is configured to turn on or off the radio resource control diversity or to turn on or off the radio resource control diversity for specific radio resource control messages.
4 . The base station of claim 3 , wherein the circuitry is configured to turn on or off the radio resource control diversity, based on the configured radio resource control message.
5 . The base station of claim 3 , wherein the circuitry is configured to turn on or off the radio resource control diversity, based on the at least one user equipment to which the configured radio resource control message is transmitted.
6 . The base station of claim 3 , wherein the circuitry is configured to transmit an instruction message to the at least one user equipment for turning on/off radio resource control diversity or to turn on or off the radio resource control diversity for specific radio resource control messages.
7 . The base station of claim 1 , wherein radio resource control diversity is initiated, based on an uplink reference signal measurement, and wherein the radio resource control diversity is performed for a downlink communication or an uplink communication.
8 . The base station of claim 7 , wherein the circuitry is configured to configure the at least one user equipment for sending at least one of feedback signals and uplink reference signals.
9 . The base station of claim 8 , wherein the circuitry is configured to define a radio resource control configuration, based on the received at least one of feedback signals and uplink reference signals.
10 . The base station of claim 1 , wherein the radio resource control diversity is initiated, based on a downlink reference signal measurement, and wherein the radio resource control diversity is performed for an uplink communication or a downlink communication.
11 . A user equipment for a mobile telecommunications system comprising:
circuitry configured to
communicate via radio resource control diversity communication,
receive or transmit at least two radio resource control messages, which are configured for radio resource control diversity communication,
receive or transmit a notification of a diversity set including base stations to be used for radio resource control diversity communication, the diversity set including an uplink diversity set and a downlink diversity set that is determined separately from the uplink diversity set, and
transmit or receive a radio resource control message repeatedly in response to transmission of a predetermined message from the user equipment to a base station.
12 . The user equipment of claim 11 , wherein the circuitry is configured to turn on or off the radio resource control diversity communication, based on an instruction message received from a base station.
13 . The user equipment of claim 11 , wherein the circuitry is configured to turn on or off the radio resource control diversity communication, based on a radio resource control establishment.
14 . The user equipment of claim 11 , wherein the circuitry is configured to turn on or off the radio resource control diversity communication in a case that the user equipment is located at a cell boundary.
15 . The user equipment of claim 11 , wherein the circuitry is configured to turn on or off the radio resource control diversity communication in a case that a radio link failure is detected.
16 . The user equipment of claim 11 , wherein the circuitry is configured to receive the at least two radio resource control messages based on a radio resource control diversity set received from a base station.
17 . The user equipment of claim 11 , wherein the circuitry is configured to transmit a radio resource control message including at least one of a target radio resource control receiver identifier and additional radio resource control receiver identifier.
18 . The user equipment of claim 11 , wherein the circuitry is configured to transmit an acknowledgment message in response to receiving the radio resource control messages.
19 . The user equipment of claim 18 , wherein the acknowledgment message includes at least one of an indication about the type of received radio resource control messages and an indication about the origin of the received radio resource control messages.