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US 10,833,822 B2Granted
System and method for MA signature assignment based on UE group separation
AssigneeHuawei Technologies Co., Ltd.
InventorsYu Cao, Mohammadhadi Baligh, Liqing Zhang
Life of this patent
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Abstract
In a wireless communication system, user equipments (UEs) may be partitioned into different groups, e.g. based on spatial separation. UEs may use multiple access (MA) signatures that have low or no correlation to each other if the UEs are in the same group. The MA signatures used by one group of UEs may be more correlated with the MA signatures used by another group of UEs. If the UEs are partitioned into the different groups based on spatial separation, then the spatial separation between the different groups may assist in increasing the reliability of detection if two UEs in different groups use correlated MA signatures.
Claims18
A method performed by a base station comprising:
- transmitting a message to a user equipment (UE), the message including an indication that indicates to the UE at least one uplink multiple access (MA) signature from a set of uplink MA signatures that are used for uplink transmission and that are associated with a first spatial group to which the UE belongs, the first spatial group being one of a plurality of spatial groups, wherein each one of the plurality of spatial groups has an associated set of uplink MA signatures, and wherein each one of the plurality of spatial groups is associated with a different beam;
- receiving an uplink transmission from the UE, the uplink transmission using an uplink MA signature from the at least one uplink MA signature;
- wherein the set of uplink MA signatures associated with the first spatial group are reference signal sequences associated with the first spatial group that are used by the base station for uplink channel estimation;
- wherein the reference signal sequences associated with the first spatial group are:
- orthogonal to each other, and non-orthogonal to other reference signal sequences associated with another spatial group of the plurality of spatial groups.
2 more elements
A base station comprising:
- a user equipment (UE) group separator to determine a first spatial group to which a UE belongs, the first spatial group being one of a plurality of spatial groups, wherein each one of the plurality of spatial groups is associated with a respective set of uplink multiple access (MA) signatures, and wherein each one of the plurality of spatial groups is associated with a different beam;
- a transmitter to transmit a message to the UE, the message including an indication that indicates to the UE at least one uplink MA signature from the set of uplink MA signatures associated with the first spatial group;
- a receiver to receive an uplink transmission from the UE, the uplink transmission using an uplink MA signature from the at least one uplink MA signature;
- wherein the set of uplink MA signatures associated with the first spatial group are reference signal sequences associated with the first spatial group that are used by the base station for uplink channel estimation;
- wherein the reference signal sequences associated with the first spatial group are:
- orthogonal to each other, and non-orthogonal to other reference signal sequences associated with another spatial group of the plurality of spatial groups.
3 more elements
A method performed by a user equipment (UE) comprising:
- determining an uplink multiple access (MA) signature from a first set of uplink MA signatures that are used for uplink transmission and that are associated with a first spatial group to which the UE belongs, the first spatial group being one of a plurality of spatial groups, wherein each one of the plurality of spatial groups has an associated set of uplink MA signatures, and wherein each one of the plurality of spatial groups is associated with a different beam;
- and
- transmitting an uplink transmission using the uplink MA signature;
- wherein the first set of uplink MA signatures are reference signal sequences used by a base station for uplink channel estimation;
- wherein the reference signal sequences are:
- orthogonal to each other, and non-orthogonal to other reference signal sequences associated with another spatial group of the plurality of spatial groups.
3 more elements
A user equipment (UE) comprising:
- a memory to store at least one uplink multiple access (MA) signature belonging to a first set of uplink MA signatures that are used for uplink transmission and that are associated with a first spatial group to which the UE belongs, the first spatial group being one of a plurality of spatial groups, wherein each one of the plurality of spatial groups is associated with a respective set of uplink MA signatures, and wherein each one of the plurality of spatial groups is associated with a different beam;
- a transmitter to transmit an uplink transmission using the at least one uplink MA signature;
- wherein the first set of uplink MA signatures are reference signal sequences used by a base station for uplink channel estimation;
- wherein the reference signal sequences are:
- orthogonal to each other, and non-orthogonal to other reference signal sequences associated with another spatial group of the plurality of spatial groups.
2 more elements
Dependencies are inferred from the claim text.