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US 12,580,684 B2Granted
Retransmission request method and apparatus, and retransmitted data reception method and apparatus
AssigneeBeijing Xiaomi Mobile Software Co., Ltd.
InventorYuanyuan Li
Life of this patent
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Abstract
A method for requesting retransmission performed by a network device located in air in a non-terrestrial network is provided. The method includes determining whether there is an error in data received from a transmitting end; determining there is an error in the data; and sending a request for retransmitting the data to the transmitting end.
Claims12
A method for requesting retransmission, comprising:
- determining, by a network device located in air in a non-terrestrial network, whether there is an error in data received from a transmitting end;
- determining there is an error in the data;
- and
- sending a request for retransmitting the data to the transmitting end,
- wherein determining whether there is an error in the data received from the transmitting end comprises:
- determining whether the data is out of sync;
- and
- determining there is an error in the data in response to determining the data is out of sync;
- wherein determining whether the data is out of sync comprises:
- performing a cyclic correlation between a first cyclic prefix of the data and a second cyclic prefix of Orthogonal Frequency Division Multiplexing;
- and determining the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a first peak value;
- or
- performing a cyclic correlation between a first synchronization sequence sent by the transmitting end and a pre-stored second synchronization sequence;
- and determining the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a second peak value.
11 more elements
A method for receiving retransmitted data, comprising:
- determining, by a receiving end in a non-terrestrial network and based on at least one of a modulation and coding mode or a received control signaling, retransmission configuration information for retransmitting data by a transmitting end through a network device located in air in the non-terrestrial network,
- wherein before the retransmission configuration information for retransmitting data is sent by the transmitting end, the network device determines whether data transmitted from the transmitting end is out of sync and determines there is an error in the data in response to determining the data is out of sync, and the network device sends a request for retransmitting the data to the transmitting end in response to determining there is an error in the data;
- receiving, by the receiving end, based on the retransmission configuration information, data retransmitted by the transmitting end through the network device;
- and
- determining there is an error in the data in response to determining the data is out of sync;
- wherein the network device determines whether the data is out of sync by:
- performing a cyclic correlation between a first cyclic prefix of the data and a second cyclic prefix of Orthogonal Frequency Division Multiplexing;
- and determining the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a first peak value;
- or
- performing a cyclic correlation between a first synchronization sequence sent by the transmitting end and a pre-stored second synchronization sequence;
- and determining the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a second peak value.
8 more elements
A network device located in air in a non-terrestrial network, comprising:
- a processor;
- and
- a memory for storing processor-executable instructions;
- wherein, the processor is configured to:
- determine whether there is an error in data received from a transmitting end;
- determine there is an error in the data;
- and
- send a request for retransmitting the data to the transmitting end,
- wherein the processor is further configured to:
- determine whether the data is out of sync;
- and
- determine there is an error in the data in response to determining the data is out of sync;
- wherein the processor is further configured to:
- perform a cyclic correlation between a first cyclic prefix of the data and a second cyclic prefix of Orthogonal Frequency Division Multiplexing;
- and determine the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a first peak value;
- or
- perform a cyclic correlation between a first synchronization sequence sent by the transmitting end and a pre-stored second synchronization sequence;
- and determine the data is out of sync in response to determining a correlation peak value of the cyclic correlation is less than a second peak value.
15 more elements
Dependencies are inferred from the claim text.