Time division duplex adaptive frame structure retransmission method, network and terminal side device
View Patent ↗A technology of dynamically allocating uplink and downlink subframes in an LTE-advanced Time Division Duplex (TDD) communication system specifically relates to a TDD adaptive frame structure retransmission method, network and terminal side device. The method includes: in a TDD adaptive frame transmission process, for an uplink subframe, if a frame structure whose Round Trip Time (RTT) period of a Physical Hybrid-ARQ Indicator Channel (PHICH) and a Physical Uplink Shared Channel (PUSCH) corresponding to the uplink subframe is 10 ms is found in seven already defined frame structures, transmitting PHICH data on a corresponding downlink subframe in the found frame structure, and receiving retransmitted data on the corresponding uplink subframe in the found frame structure. The technical solution of the present application ensures the Hybrid Automatic Repeat Request (HARQ) compatibility with an uplink data channel of an R10UE.
1. A Time Division Duplex (TDD) adaptive frame structure retransmission method, comprising:
in a TDD adaptive frame transmission process, for an uplink subframe, if a frame structure whose Round Trip Time (RTT) period of a Physical Hybrid-ARQ indicator channel (PHICH) and a Physical Uplink Shared Channel (PUSCH) corresponding to the uplink subframe is 10 ms is found from seven already defined frame structures, transmitting PHICH data on a corresponding downlink subframe in the found frame structure, and receiving retransmitted data on the corresponding uplink subframe in the found frame structure.
2. The method according to claim 1 , wherein the method further comprises:
if a frame structure whose RTT period of a PHICH and a PUSCH corresponding to the uplink subframe is 10 ms is not found from the seven already defined frame structures,
newly defining a frame structure whose RTT period is 10 ms or integral multiple of 10 ms, transmitting the PHICH data on a corresponding downlink subframe in the newly defined frame structure, and receiving retransmitted data on the corresponding uplink subframe in the newly defined frame structure, wherein the newly defined frame structure is a frame structure that does not conflict with each of the subframes in the seven already defined frame structures.
3. The method according to claim 1 , wherein,
if a frame structure whose RU period of a PHICH and a PUSCH corresponding to the uplink subframe is 10 ms is not found from the seven already defined frame structures,
only transmitting new uplink data on the uplink subframe; or
configuring the uplink subframe as a downlink subframe.
4. The method according to claim 1 , further comprising:
in a TDD adaptive frame transmission process, for a downlink subframe, searching for an uplink subframe closest to the downlink subframe from seven already defined frame structure time sequencing relationships, and if a number of Physical Downlink Shared Channels (PDSCHs) associated with the found uplink subframe is less than or equal to 4, feeding back an Acknowledgement/Negative Acknowledgement (A/N) reply on the uplink subframe; and
if the number of PDSCHs associated with the found uplink subframe is larger than 4, feeding back an A/N on an uplink subframe after the found uplink subframe which is closest to the found uplink subframe in the seven already defined frame structure time sequencing relationships and of which a number of associated PDSCHs is less than or equal to 4.
5. The method according to claim 4 , wherein,
if there does not exist an uplink subframe after the found uplink subframe which is closest to the found uplink subframe in the seven already defined frame structure time sequencing relationships and of which a number of associated PDSCHs is less than or aqua to 4, feeding back an A/N on the found uplink subframe.
6. The method according to claim 5 , wherein the method further comprises:
In the TDD adaptive frame transmission process, a network side semi-statically notifying a User Equipment (UE) through a Radio Resource Control (RRC) protocol signaling to enter an adaptive frame structure hangover state, and after receiving the RRC, the UE performing a data operation according to a predefined time sequencing relationship; or
the network side notifying the UE of a dynamically configured time sequencing relationship of each subframe through a set dynamic signaling, and the UE performing a data operation according to the time sequencing relationship of each subframe in the set dynamical signaling received.
7. The method according to claim 4 , wherein the method further comprises:
In the TDD adaptive frame transmission process, a network side semi-statically notifying a User Equipment (UE) through a Radio Resource Control (RRC) protocol signaling to enter an adaptive frame structure handover state, and after receiving the RRC, the UE performing a data operation according to a predefined time sequencing relationship; or
the network side notifying the UE of a dynamically configured time sequencing relationship of each subframe through a set dynamic signaling, and the UE performing a data operation according to the time sequencing relationship of each subframe in the set dynamical signaling received.