Method and device in nodes used for wireless communication about radio resource control link faulure
The present disclosure provides a method and device in a node used for wireless communications. A node first performs a channel measurement respectively on a first reference signal resource set and a second reference signal resource set, and both the first reference signal resource set and the second reference signal resource set comprise at least one reference signal resource; then as a response to K consecutive out-of-step(s), starts a first timer; and as a response to an expiry of the first timer, transmits a target message; a measurement performed on a target reference signal resource set is used to determine the K consecutive out-of-step(s), the target reference signal resource set is one of the first reference signal resource set and the second reference signal resource set. The application improves the method and device of M-TRP inter-cell mobility to optimize the system performance.
1 . A user equipment (UE), comprising:
a transceiver; and
a processor, operatively coupled to the transceiver;
wherein the transceiver and processor are configured to:
receive configuration information of a first reference signal resource set and a second reference-signal resource set, each including at least one reference signal resource;
determine, based on channel measurements performed on a target reference signal resource set selected from the first and second reference signal resource sets, that K consecutive out-of-sync events have occurred;
responsive to the determination, start a timer; and
upon expiry of the timer:
(a) when the timer is kept in a master cell group (MCG):
(i) when Access Stratum (AS) security is not activated, enter an RRC_IDLE state;
(ii) initiate an MCG failure information procedure, or
(iii) initiate a connection reestablishment procedure;
(b) when the timer is kept in a Secondary Cell Group (SCG), and only when the target reference signal resource set is the second reference signal resource set, inform a network of a radio link failure associated with the SCG by initiating an SCG failure information process.
2 . The UE of claim 1 , wherein the channel measurements are performed on RadioLinkMonitoringRS configured for an active downlink bandwidth part.
3 . The UE of claim 1 , wherein K corresponds to N310 and the timer corresponds to T310.
4 . The UE of claim 1 , wherein K is set per set such that K=K1when the target reference signal resource set is the first set and K=K2 when the target reference signal resource set is the second set.
5 . The UE of claim 1 , wherein an “out-of-sync” event is a physical-layer out-of-sync indication provided from lower layers to higher layers.
6 . The UE of claim 1 , wherein the channel measurements include at least one of a reference signal received power (RSRP) or a synchronization-signal signal-to- interference-plus-noise ratio (SS-SINR) measured on reference signal resources of the target reference signal resource set.
7 . The UE of claim 1 , wherein any reference signal resource in the first reference signal resource set is associated with a first cell, and any reference signal resource in the second reference signal resource set is associated with a second cell.
8 . The UE of claim 1 , wherein the first reference signal resource set is associated with a neighbor cell and the second reference signal resource set is associated with a serving cell.
9 . The UE of claim 1 , wherein the transceiver and processor are further configured to:
upon expiry of the timer, and only when (i) the timer is kept in the SCG and (ii) the target reference signal resource set is the second reference signal resource set, initiate an SCG failure information procedure to indicate a radio link failure associated with the SCG.
10 . A method performed by a user equipment (UE), the method comprising:
receiving configuration information of a first reference signal resource set and a second reference signal resource set, the first reference signal resource set including at least one reference signal resource, the second reference signal resource set including at least one reference signal resource;
determining, based on channel measurements performed on a target reference signal resource set selected from the first and second reference signal resource sets, that K consecutive out-of-sync events have occurred;
responsive to the determination, starting a timer, wherein the timer is kept in a master cell group (MCG); and
upon expiry of the timer:
(i) when Access Stratum (AS) security is not activated, enter an RRC_IDLE state;
(ii) initiate an MCG failure information procedure, or
(iii) initiate a connection reestablishment procedure.
11 . The method of claim 10 , wherein the channel measurements are performed on RadioLinkMonitoringRS configured for an active downlink bandwidth part.
12 . The method of claim 10 , wherein K corresponds to N310 and the timer corresponds to T310.
13 . The method of claim 10 , wherein K is set per set such that K=K1 when the target reference signal resource set is the first set and K =K2 when the target reference signal resource set is the second set.
14 . The method of claim 10 , wherein an “out-of-sync” event is a physical-layer out-of-sync indication provided from lower layers to higher layers.
15 . The method of claim 10 , wherein the channel measurements include at least one of a reference signal received power (RSRP) or a synchronization-signal signal-to-interference-plus-noise ratio (SS-SINR) measured on reference signal resources of the target reference signal resource set.
16 . The method of claim 10 , wherein any reference signal resource in the first reference signal resource set is associated with a first cell, and any reference signal resource in the second reference signal resource set is associated with a second cell.
17 . The method of claim 10 , wherein the first reference signal resource set is associated with a neighbor cell and the second reference signal resource set is associated with a serving cell.
18 . A method performed by a user equipment (UE), the method comprising:
receiving configuration information of a first reference signal resource set and a second reference signal resource set, the first reference signal resource set including at least one reference signal resource, the second reference signal resource set including at least one reference signal resource;
determining, based on channel measurements performed on a target reference signal resource set selected from the first and second reference signal resource sets, that K consecutive out-of-sync events have occurred;
responsive to the determination, starting a timer, wherein the timer is kept in a secondary cell group (SCG); and
upon expiry of the timer, informing a network of a radio link failure associated with the SCG by initiating an SCG failure information process.
19 . The method of claim 18 , wherein K corresponds to N310 and the timer corresponds to T310.
20 . The method of claim 18 , wherein K is set per set such that K =K1 when the target reference signal resource set is the first set and K =K2 when the target reference signal resource set is the second set.