Channel profiles for quasi-stationary device
A user device, UE, for a wireless communication network is described. The he UE performs measurements of one or more reference signals received from a network entity of the wireless communication network, each reference signal being associated with a TCI state. For transmitting or receiving a transmission associated with a certain TCI state, the UE uses one or more parameters obtained by the measurement of the reference signal being associated with the certain TCI state of the transmission. Responsive to a certain event, the UE resets parameters obtained by a measurement associated with the TCI state of at least one of the one or more reference signals.
1 . A user device, UE, for a wireless communication network, wherein
the UE is to perform measurements of one or more reference signals received from a network entity of the wireless communication network, each reference signal being associated with a transmission configuration indication (TCI) state,
for transmitting or receiving a transmission associated with a certain TCI state, the UE is to use one or more parameters acquired by the measurement of the reference signal being associated with the certain TCI state of the transmission,
after an indication from the network entity, the UE is to reset parameters acquired by a measurement associated with the TCI state of at least one of the one or more reference signals,
the indication from the network entity comprises a bandwidth part, BWP, indicator for signaling a change of a currently active TCI state or sub-TCI state,
the UE is configured or preconfigured with a plurality of different BWP configurations, the plurality of BWP configurations comprising the same center frequency and bandwidth, and
each BWP configuration is associated with a different TCI state or a different sub-TCI state.
2 . The user device, UE, of claim 1 , wherein
a TCI state associated with a reference signal comprises a plurality of sub-TCI states, and the UE is to associate a measurement of a reference signal with a currently active sub-TCI state,
the indication from the network entity causes a change of the currently active sub-TCI state, and
after the indication from the network entity, the UE is to reset the parameters acquired by the measurement of the reference signal by continuing the measurement and associating the measurement with a new active sub-TCI state.
3 . The user device, UE, of claim 2 , wherein the indication from the network entity comprises a signaling which of the plurality of sub-TCI states is active.
4 . The user device, UE, of claim 2 , wherein, for transmitting or receiving a transmission associated with the TCI state, the UE is to use one or more parameters acquired by the measurement associated with the currently active sub-TCI state, wherein the sub-TCI state may be indicated with the UL or DL scheduling assignment/grant for the transmission.
5 . The user device, UE, of claim 2 , wherein the UE is to receive from the network entity an explicit signaling, or an implicit signaling.
6 . The user device, UE, of claim 1 , wherein
the UE is configured or preconfigured with a plurality of BWP configurations, the plurality of BWP configurations comprising a first BWP configuration and one or more further BWP configurations, the first BWP configuration defining the BWP to be used by the UE, and the one or more further BWP configurations comprising only a reference to the first BWP configuration to be copied, or a reference to one or more of the parameters to be copied from the first BWP configuration, and
each BWP configuration is associated with a different sub-TCI state.
7 . The user device, UE, of claim 1 , wherein one or some or all of the reference signals are associated with a plurality of TCI states, and wherein each of the plurality of sub-TCI states is a TCI state associated with a reference signal.
8 . The user device, UE, of claim 1 , wherein
one or some or all of the reference signals are associated with a plurality of TCI states, and the UE is to associate a measurement of a reference signal with a currently active TCI state,
the indication from the network entity causes a change of the currently active TCI state, and
after the indication from the network entity, the UE is to reset the parameters acquired by the measurement of the reference signal by continuing the measurement and associating the measurement with the new active TCI state.
9 . The user device, UE, of claim 1 , wherein
the UE is to move between a plurality of different locations at which the UE is stationary or an environment of the UE changes between different constellations so that a channel state of a channel between the UE and the network entity changes from time to time and remains quasi-static otherwise, and
the UE is to signal to the network entity information about its stationarity or a certain constellation for allowing the network entity to configure the UE.
10 . The user device, UE, of claim 9 , wherein the UE is to signal one or more of the following parameters using an information element, IE:
Quasi-static: an index value describing that the using different TCI states or sub-TCI states for one reference signal measurement is enabled or disabled
Stationarity-Index or stationarity status: an index value describing how static the UE or channel is
Time-in-current-status: the time that the UE already spent in the indicated stationarity status, Stationarity-Pattern: a periodicity, duration or pattern of stationarity, e.g., that UE or channel moves in regular intervals, or stationarity is interpreted as a channel stationarity,
Stationarity-Timer: remaining time for which the UE is expected to stay in the indicated stationarity status.
11 . The user device, UE, of claim 9 , wherein the UE is to signal one or more of the following parameters using a measurement report:
Stationarity-Index or stationarity status: an index value describing how static the UE or channel is,
Time-in-current-status: the time that the UE already spent in the indicated stationarity status,
Stationarity-Pattern: a periodicity, duration or pattern of stationarity, e.g., that UE moves in regular intervals, or stationarity is interpreted as a channel stationarity,
Stationarity-Timer: remaining time for which the UE or channel is expected to stay in the indicated stationarity status,
Channel-Fluctuation-Interval: the UE reports an index which is associated with a channel-fluctuation-interval which describes the thresholds in which the channel fluctuation is expected to stay during the stationary period.
12 . The user device, UE, of claim 1 , wherein
the UE is to measure one or more particular reference signals, comprised by a received transmission associated with a certain TCI state or sub-TCI state, and use the measured reference signal for a channel estimation between the UE and the network entity,
for one or more further received transmissions associated with the certain TCI state or sub-TCI state, the UE is to use for the channel estimation at least one of the one or more particular reference signals.
13 . The user device, UE, of claim 1 , wherein
the UE is to transmit one or more particular reference signals embedded in each transmission associated with a certain TCI state or sub-TCI state,
for one or more further transmissions associated with the certain TCI state or sub-TCI state, the UE is to not transmit at least one of the one or more particular reference signals together with the transmission.