Methods and apparatuses for handling the configuration of measurements to be performed by a user equipment in a wireless communication network
A method performed by a first base station, is described. The first base station determines a change in one or more measurements to be performed by a UE. The measurements are associated with a first set of frequencies. The first base station also transmits a first message to a second base station comprising information regarding which frequencies in the first set are to be changed. The first base station and the second base station serve the UE. A method performed by the second base station is also described whereby the second base station receives the first message. In a method performed by the UE, the UE receives, from the first base station, a configuration message configured to specify the measurements to perform and a measurement gap configuration. The UE then takes the measurements based on the configuration message.
1. A method performed by a base station operating as a first base station serving a User Equipment (UE) in multiconnectivity with a second base station, the method comprising:
determining a change in a first set of frequencies associated with one or more measurements to be performed by the UE;
transmitting a first message to the second base station, the first message indicating the change;
receiving an inter-node Radio Resource Control (RRC) message from the second base station, as a second message that indicates a measurement gap configuration to be used by the UE, the measurement gap configuration determined by the second base station based on the change; and
transmitting a third message to the UE, the third message being a RRC message that indicates the one or more measurements to be performed by the UE and embeds the second message indicating the measurement gap configuration to be used by the UE.
2. The method according to claim 1 , wherein the first set of frequencies comprises New Radio (NR) frequencies.
3. The method according to claim 1 , wherein the change comprises adding or removing one or more frequencies in the first set of frequencies.
4. A method performed by a base station operating as a second base station serving a User Equipment (UE) in multiconnectivity with a first base station, the method comprising:
receiving a first message from the first base station, the first message indicating a change in a first set of frequencies associated with one or more measurements to be performed by the UE;
determining a measurement gap configuration to be used by the UE, based on the change; and
sending a second message to the first base station for subsequent transmission to the UE as an embedded message, the second message being an inter-node Radio Resource Control (RRC) message that indicates the measurement gap configuration to be used by the UE.
5. The method according to claim 4 , wherein the first set of frequencies comprises New Radio (NR) frequencies.
6. The method according to claim 4 , wherein the change comprises adding or removing the one or more frequencies in the first set of frequencies.
7. A method performed by a user equipment (UE) served by a first base station acting as a Master Node (MN) and by a second base station acting as a Secondary Node (SN), the method comprising:
receiving a configuration message from the first base station, the configuration message comprising a MN Radio Resource Control (RRC) message specifying one or more measurements to be performed by the UE and embedding a SN RRC message comprising a measurement gap configuration to be used by the UE, as determined by the second base station; and
performing the one or more measurements based on the configuration message.
8. The method according to claim 7 , wherein the MN RRC message is a Long Term Evolution (LTE) RRC message, and wherein the SN RRC message is a New Radio (NR) RRC reconfiguration message.
9. The method according to claim 7 , wherein the measurement gap configuration is determined by the second base station based on a change indicated by the first base station, regarding a first set of frequencies associated with the one or more measurements to be performed by the UE.
10. A base station comprising:
radio circuitry configured for communicating with User Equipments (UE); and
processing circuitry that, with respect to the base station acting as a first base station serving a UE in multiconnectivity with a second base station, is configured to:
determine a change in a first set of frequencies associated with one or more measurements to be performed by the UE;
transmit a first message to the second base station, the first message comprising information regarding the change;
receive a second message from the second base station, the second message being an inter-node Radio Resource Control (RRC) message indicating a measurement gap configuration to be used by the UE, the measurement gap configuration determined by the second base station based on the change; and
transmit a third message to the UE, the third message being a RRC message indicating the one or more measurements to be performed by the UE and embedding the second message indicating the measurement gap configuration to be used by the UE.
11. A base station comprising:
radio circuitry configured for communicating with User Equipments (UE); and
processing circuitry that, with respect to the base station acting as a second base station serving a UE in multiconnectivity with a first base station, is configured to:
receive a first message from the first base station, the first message comprising information regarding a change in a first set of frequencies associated with one or more measurements to be performed by a user equipment (UE);
determine a measurement gap configuration to be used by the UE, based on the change; and
send an inter-node Radio Resource Control (RRC) message to the first base station as a second message for subsequent transmission to the UE as an embedded message, the second message comprising the measurement gap configuration to be used by the UE.
12. A user equipment (UE) comprising:
radio circuitry configured for communicating with base stations; and
processing circuitry that, with respect to the UE being served by a first base station acting as a Master Node (MN) and by a second base station acting as a Secondary Node (SN), is configured to:
receive, via the radio circuitry, a configuration message from the first base station, the configuration message comprising a MN Radio Resource Control (RRC) configuration message specifying one or more measurements to be performed by the UE and embedding a SN RRC message comprising a measurement gap configuration to be used by the UE, as determined by the second base station; and
control the UE to perform the one or more measurements based on the configuration message.
13. A method performed by a user equipment (UE) served by a first base station acting as a Master Node (MN) and by a second base station acting as a Secondary Node (SN), the method comprising:
receiving measurement configuration information generated by the first base station, identifying a measurement object involving a carrier frequency associated with the second base station;
receiving measurement gap configuration information generated by the second base station, configuring measurement gaps to be used by the UE for measuring on the carrier frequency; and
performing measurements on the carrier frequency according to the configured measurement gaps.