Methods and apparatus to support mobility through beam tracking in new radio access system
Methods and apparatus are provided for mobility support through beam tracking in the new radio access system. In one novel aspect, one or more beam-sets are configured for fast beam tracking. Each beam-set includes one or more multiple beams or transmit-receive points (TRPs). The UE performs the mobility support through lower layer based on one or more configured beam-sets. The lower layer can be a MAC layer or a PHY layer. In one embodiment, a channel status information (CSI) set and a transmission set are configured. The UE performs CSI measurements on all beams of the CSI set for potential beam tracking and data transmitting and receiving, and control signaling through one or more beams of the transmission set. In another embodiment, the UE further configures a candidate set. The beam-sets can be configured by the network or by the UE.
1. A method comprising:
establishing a connection with a group of TRPs in a radio network by a user equipment (UE), wherein the TRPs group contain one or more TRPs, and wherein each TRP is configured with a set of beams;
configuring a channel state information (CSI) set comprising of one or more beams corresponding to one or more TRPs, wherein the UE performs CSI measurements on the CSI set for potential beam tracking; and
configuring a transmission set, wherein the transmission set is a subset of the CSI set, and wherein the UE performs data transmitting and receiving, and control signaling transmitting and receiving through one or more beams of the transmission set, and wherein the TRPs for data transmitting and receiving are dynamically changed by the UE or network for different transmission time interval (TTI) within the transmission set.
2. The method of claim 1 , wherein performing a mobility management via a lower layer based on the CSI set, wherein the lower layer is one of protocol layers comprising of a PHY layer and a MAC layer.
3. The method of claim 1 , wherein the control signaling includes at least one of signals comprising: a CSI report, a beam switching command, an acknowledgement for the beam switching command, a scheduling request (SR), a downlink (DL) assignment, and an uplink (UL) grant, preambles for random access.
4. The method of claim 1 , wherein the CSI set is configured by a network entity based at least one of CSI-set information comprising: UE location information, UE RRM measurement reports, RRM measurement results, and the UE receives information about the CSI set from the network.
5. The method of claim 1 , wherein the CSI set is determined by the UE based on at least one of CSI-set information comprising: UE location information, and UE RRM measurement results.
6. The method of claim 1 , wherein transmission set is configured by the UE based on UE CSI measurement results.
7. The method of claim 1 , wherein transmission set is configured by the network based on CSI report or the measurement results on UE UL reference signals, and the UE receives information about the transmission set from the network.
8. The method of claim 1 , further comprising:
configuring a candidate set by the UE or the network, wherein the candidate set is a super of one or more CSI sets including multiple TRPs each with multiple beams, and wherein the candidate set is used for mobility procedures and a CSI set determination, wherein when the candidate set in determined by the network, the UE receives information about the candidate set from the network.
9. A user equipment (UE), comprising:
a RF transceiver that communicates with one or more TRPs in a wireless network, wherein each TRP is configured with a set of beams;
a channel state information (CSI) set configurator that configures a channel state information (CSI) set comprising of one or more beams corresponding to one or more TRPs, wherein the UE performs CSI measurements on all beams of the CSI set for potential beam tracking;
a transmission set configurator that configures a transmission set, wherein the transmission set is a subset of the CSI set, and wherein the UE performs data transmitting and receiving, and control signaling transmitting and receiving through one or more beams of the transmission set, and wherein the TRPs for data transmitting and receiving from change dynamically in different transmission time interval (TTI) within the transmission set; and
a mobility manager that performs a mobility management via a lower layer based on the CSI set and the transmission set, wherein the lower layer is one of protocol layers comprising of a PHY layer and a MAC layer.
10. The UE of claim 9 , wherein the UE performs CSI measurement and sends CSI reports set to the wireless network or the UE sends UL reference signals over lower layer on all beams of the CSI.
11. The UE of claim 9 , wherein the control signaling includes at least one of signals comprising: a CSI report, a beam switching command, a scheduling request, a downlink (DL) assignment, and an uplink (UL) grant, preambles for random access.
12. The UE of claim 9 , wherein the CSI set is configured by a network entity based at least one of CSI-set information comprising: UE location information, and UE RRM measurement reports, and the UE receives information about the CSI set from the network.
13. The UE of claim 9 , wherein the CSI set is determined by the UE based on UE RRM measurement results.
14. The UE of claim 9 , further comprising:
a RRM manager that performs a radio resource management (RRM) measurement procedure; and
a RRM reporter that reports RRM measurement results to the wireless network.
15. The UE of claim 9 , wherein the transmission set is configured by the UE based on UE CSI measurement results.
16. The UE of claim 9 , wherein the transmission set is configured by a wireless network entity base on UE location information, UE CSI measurement reports, or both.
17. The UE of claim 9 , further comprising:
a candidate set configurator that obtains a candidate set, wherein the candidate set is a super of one or more CSI sets including multiple TRPs each with multiple beams, and wherein the candidate set is used for mobility procedures and a CSI set determination.