Methods and devices for base station

1 . A method for a Base Station, BS, in a communication network, comprising:

obtaining channel quality information sent from a User Equipment, UE; and

in response to determining that the UE is in poor coverage according to the channel quality information, configuring the UE to perform downlink measurements on at least one downlink RLM measurement source in accordance with measurement configurations;

wherein at least reporting configurations of the measurement configurations on the at least one downlink RLM measurement source are disabled before the determining that the UE is in poor coverage.

2 . The method of claim 1 , further comprising:

determining that the at least one downlink RLM measurement source is unavailable,

wherein the obtaining is in response to the determining that the at least one downlink RLM measurement source is unavailable.

3 . The method of claim 2 , wherein the determining that the at least one downlink RLM measurement source is unavailable further comprises any of the following:

in response to determining that the BS is in power saving mode, determining that the at least one downlink RLM measurement source is unavailable, or

in response to determining that the BS is in over-heating protection mode, determining that the at least one downlink RLM measurement source is unavailable.

4 . The method of claim 2 , wherein the obtaining further comprises:

checking time information of the channel quality information with time when the at least one downlink RLM measurement source is available, and choosing the channel quality information of which the time information matches the time when the at least one downlink RLM measurement source is available.

5 . The method of claim 2 , wherein a duration when the at least one downlink RLM measurement source is unavailable is on a level of intervals of the at least one downlink RLM measurement source.

6 . The method of claim 2 , wherein a duration when the at least one downlink RLM measurement source is unavailable is on a Transmission Time Interval, TTI, level.

7 . The method of claim 1 , wherein the determining that the UE is in poor coverage, further comprises:

performing layer 3 filtering of result of the channel quality information, and

in response to filtered result being below a predetermined threshold, determining that the UE is in poor coverage.

8 . The method of claim 1 , further comprising:

enabling the at least one downlink RLM measurement source.

9 . The method of claim 3 , further comprising one of the following accordingly:

enabling the at least one downlink RLM measurement source by disabling the power saving mode, or

enabling the at least one downlink RLM measurement source by disabling the over-heating protection mode.

10 . The method of claim 1 , further comprising:

in response to receiving a message from the UE indicating that the UE is in good coverage, removing the measurement configurations from the UE.

11 . The method of claim 1 , wherein the at least one downlink RLM measurement source is UE specific.

12 . The method of claim 1 , wherein the at least one downlink RLM measurement source comprises Channel State Information Reference Signal, CSI-RS.

13 . The method of claim 1 , wherein the channel quality information comprises Channel Quality Indicator, CQI sent in a MAC layer control message.

14 . The method of claim 1 , wherein the communication network comprises a next generation network.

15 . A communication device in a communication network, comprising:

a storage, adapted to store instructions therein;

a processor, adapted to execute the instructions to cause the communication device to perform:

obtaining channel quality information sent from a User Equipment, UE; and

in response to determining that the UE is in poor coverage according to the channel quality information, configuring the UE to perform downlink measurements on at least one downlink RLM measurement source in accordance with measurement configurations;

wherein at least reporting configurations of the measurement configurations on the at least one downlink RLM measurement source are disabled before the determining that the UE is in poor coverage.

16 . The communication device of claim 15 , the processor is adapted to execute the instructions to cause the communication device to perform of:

determining that the at least one downlink RLM measurement source is unavailable,

wherein the obtaining is in response to the determining that the at least one downlink RLM measurement source is unavailable.

17 . The communication device of claim 16 , the processor is adapted to execute the instructions to cause the communication device to perform of:

in response to determining that the BS is in power saving mode, determining that the at least one downlink RLM measurement source is unavailable, or

in response to determining that the BS is in over-heating protection mode, determining that the at least one downlink RLM measurement source is unavailable.

18 . The communication device of claim 16 , the processor is adapted to execute the instructions to cause the communication device to perform of:

checking time information of the channel quality information with time when the at least one downlink RLM measurement source is available, and choosing the channel quality information of which the time information matches the time when the at least one downlink RLM measurement source is available.

19 . The communication device of claim 18 , wherein a duration when the at least one downlink RLM measurement source is unavailable is on a level of intervals of the at least one downlink RLM measurement source.

20 . A method for a Base Station, BS, in a communication network, comprising:

obtaining channel quality information sent from a User Equipment, UE;

in response to determining that the UE is in poor coverage according to the channel quality information, configuring the UE to perform downlink measurements on at least one downlink RLM measurement source in accordance with measurement configurations;

determining that the at least one downlink RLM measurement source is unavailable,

wherein the obtaining is in response to the determining that the at least one downlink RLM measurement source is unavailable;

wherein the determining that the at least one downlink RLM measurement source is unavailable further comprises any of the following:

in response to determining that the BS is in power saving mode, determining that the at least one downlink RLM measurement source is unavailable, or

in response to determining that the BS is in over-heating protection mode, determining that the at least one downlink RLM measurement source is unavailable.