System and methods of dynamic TDD configurations
AssigneeMediatek Inc.
InventorsShiang-Jiun Lin, Chien-Hwa Hwang, Xiangyang Zhuang
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Abstract
Solutions to support the coexistence of legacy UEs and new released UEs in adaptive TDD systems are proposed. Methods of TDD grouping, RACH (random access channel) resource allocation, and DL/UL data transmission and HARQ (Hybrid Automatic Repeat Request) process to serve legacy UEs without interfering the operation of new released UEs are proposed. With the methods proposed in this invention, both the legacy UEs and the new released UEs can be served in the adaptive TDD systems and the data transmission from the legacy UEs would not interfere the data reception of the new released UEs.
Claims19
A method comprising:
- determining a time division duplex (TDD) group by a base station in a mobile communication network, wherein the TDD group contains multiple TDD configurations;
- broadcasting a TDD reference configuration of the TDD group to a first UE via a system information block (SIB), wherein the first UE is a legacy UE, the TDD reference configuration belongs to the TDD group, the TDD reference configuration has the most/least common uplink subframes in the TDD group, wherein the TDD reference configuration is taken as a common configuration representing all the TDD configuration of the TDD group, and the TDD reference configuration of the TDD group is recognized by the first UE as an operating TDD configuration;
- and
- transmitting an instantaneous TDD configuration to a second UE, wherein the instantaneous TDD configuration belongs to the TDD group, wherein the second UE is a new-released UE that supports dynamic TDD adaptation, and wherein the TDD reference configuration does not change with the changes of the instantaneous TDD configuration.
A method comprising:
- receiving a TDD reference configuration of a TDD group by a user equipment (UE), wherein the TDD group contains multiple TDD configurations and the TDD reference configuration belongs to the TDD group and the TDD reference configuration has the most/least common uplink subframes in the TDD group, wherein the TDD reference configuration is taken as a common configuration representing all the TDD configuration of the TDD group;
- and
- performing measurements based on the TDD reference configuration of the TDD group if the UE is a legacy UE, wherein the TDD reference configuration of the TDD group is recognized by the UE as an operating TDD configuration, wherein the UE performs measurements based on an instantaneous TDD configuration if the UE is a new-released UE that supports dynamic TDD adaptation, wherein the TDD reference configuration does not change with the changes of the instantaneous TDD configuration.
A user equipment (UE) comprising:
- a receiver that receives a TDD reference configuration of a TDD group, wherein the TDD group contains multiple TDD configurations and the TDD reference configuration belongs to the TDD group and the TDD reference configuration has the most/least common uplink subframes in the TDD group, wherein the TDD reference configuration is taken as a common configuration representing all the TDD configuration of the TDD group;
- and
- a measurement module that performs measurements based on the TDD reference configuration of the TDD group if the UE is a legacy UE, wherein the TDD reference configuration of the TDD group is recognized by the UE as an operating TDD configuration, wherein the measurement module performs measurements based on an instantaneous TDD configuration if the UE is a new-released UE that supports dynamic TDD adaptation, wherein the TDD reference configuration does not change with the changes of the instantaneous TDD configuration.
Dependencies are inferred from the claim text.