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US 2020/0029292 A1Published application
Methods and Systems for Generalized RACH-less Mobility
AssigneeHuawei Technologies Co., Ltd.
InventorsJialin Zou, Yongxia Lyu, Hua Xu, Liqing Zhang, Jianglei Ma
Life of this patent
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Abstract
In accordance to embodiments, a user equipment (UE) may receive, from the source base station, a beam information message comprising beam associated information. The beam associated information may indicate a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station and a plurality of default timing advance (TA)s. Each default TA of the plurality of TAs is associated with one beam of the plurality of beams in the target base station and additional related configurations.
Claims78
A method for random-access channel (RACH)-less mobility from a source base station to a target base station, the method comprising:
- receiving, by a user equipment (UE) from the source base station, a beam information message comprising beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- transmitting, to the target base station without performing random access by the UE to the target base station, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
A method for random-access channel (RACH)-less mobility from a source base station to a target base station, the method comprising:
- transmitting, by the target base station to the source base station, beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- receiving, by the target base station from a user equipment (UE) without performing random access by the UE, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
A method for random-access channel (RACH)-less mobility from a source base station to a target base station, the method comprising:
- receiving, by the source base station from the target base station, beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- transmitting, by the source base station to a user equipment (UE), a beam information message comprising the beam associated information, wherein the UE, without performing random access, transmits to the target base station, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
A user equipment (UE), comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming comprising instructions for:
- receiving, from a source base station, a beam information message comprising beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in a target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- transmitting, without performing random access by the UE to the target base station, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
3 more elements
A target base station, comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming comprising instructions for:
- transmitting, to a source base station, beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- receiving, from a user equipment (UE) without performing random access by the UE, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
3 more elements
A source base station, comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming comprising instructions for:
- receiving, from a target base station, beam associated information, the beam associated information indicating a plurality of beam identifiers (IDs) corresponding to a plurality of beams in the target base station, a plurality of default timing advance (TA) groups, and a plurality of additional related configuration sets, wherein each default TA group of the plurality of default TA groups is associated with a beam of the plurality of beams in the target base station and an additional related configuration set of the plurality of the additional related configuration sets;
- and
- transmitting, to a user equipment (UE), a beam information message comprising the beam associated information, wherein the UE, without performing random access, transmits to the target base station, an uplink (UL) transmission with a TA adjustment based on a target beam of the plurality of beams in which the UE is located and a first additional related configuration set of the plurality of additional related configuration sets, wherein the TA adjustment is based on a first default TA of a first default TA group associated with the target beam, and wherein the first additional related configuration set is associated with the first default TA.
3 more elements
A method for random-access channel (RACH)-less mobility from a source base station to a target base station, the method comprising:
- transmitting, by a user equipment (UE), a UE uplink (UL) reference signal;
- receiving, by the UE from the target base station, a beam information message comprising beam associated information, the beam associated information indicating a beam identifier (ID) corresponding to a target beam in the target base station, a real-time timing advance (TA) associated with the target beam, and an additional related configuration set, wherein the real-time TA is determined by the target base station based on the UE UL reference signal, and wherein the additional related configuration set is associated with the real-time TA;
- and
- transmitting, to the target base station without performing random access by the UE to the target base station, a UL transmission with a TA adjustment based on the target beam in which the UE is located and the additional related configuration set in the beam associated information, wherein the TA adjustment is based on the real-time TA associated with the target beam assigned by the target base station to the UE.
1 more element
A method for random-access channel (RACH)-less mobility from a source base station to a target base station, the method comprising:
- receiving, by the target base station from a user equipment (UE), a UE uplink (UL) reference signal;
- transmitting, by the target base station to the UE, a beam information message comprising beam associated information, the beam associated information indicating a beam identifier (ID) corresponding to a target beam in the target base station, a real-time timing advance (TA) associated with the target beam, and an additional related configuration set, wherein the real-time TA is determined by the target base station based on the UE UL reference signal, and wherein the additional related configuration set is associated with the real-time TA;
- and
- receiving, by the target base station from the UE without performing random access by the UE, a UL transmission with a TA adjustment based on the target beam in which the UE is located and the additional related configuration set in the beam associated information, wherein the TA adjustment is based on the real-time TA associated with the target beam assigned by the target base station to the UE.
1 more element
A user equipment (UE), comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming comprising instructions for:
- transmitting UE uplink (UL) a reference signal;
- receiving, from a target base station, a beam information message comprising beam associated information, the beam associated information indicating a beam identifier (ID) corresponding to a target beam in the target base station, a real-time timing advance (TA) associated with the target beam, and an additional related configuration set, wherein the real-time TA is determined by the target base station based on the UE UL reference signal, and wherein the additional related configuration set is associated with the real-time TA;
- and
- transmitting, to the target base station without performing random access by the UE to the target base station, a UL transmission with a TA adjustment based on the target beam in which the UE is located and the additional related configuration set in the beam associated information, wherein the TA adjustment is based on the real-time TA associated with the target beam assigned by the target base station to the UE.
4 more elements
A target base station, comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming comprising instructions for:
- receiving, from a user equipment (UE), a UE uplink (UL) reference signal;
- transmitting, to the UE, a beam information message comprising beam associated information, the beam associated information indicating a beam identifier (ID) corresponding to a target beam in the target base station, a real-time timing advance (TA) associated with the target beam, and an additional related configuration set, wherein the real-time TA is determined by the target base station based on the UE UL reference signal, and wherein the additional related configuration set is associated with the real-time TA;
- and
- receiving, from the UE without performing random access by the UE, a UL transmission with a TA adjustment based on the target beam in which the UE is located and the additional related configuration set in the beam associated information, wherein the TA adjustment is based on the real-time TA associated with the target beam assigned by the target base station to the UE.
4 more elements
Dependencies are inferred from the claim text.