METHOD AND DEVICE USED FOR RELAY WIRELESS COMMUNICATION
A method and device for relay wireless communications. A first node receives a first data unit set through a second logical channel; transmits a second data unit set through a first logical channel; determines a first link failure; as a response to the behavior of determining the first link failure, generates a first control message; and transmits the first control message; herein, the first control message is used to indicate that a third data unit set is not successfully transmitted; any data unit in the third data unit set belongs to the first data unit set; any bit in the second data unit set belongs to the first data unit set. In the relay transmission of the present disclosure, when a link fails, a relay node transmits a status report of packets not successfully transmitted to a source node, so as to reduce packet loss and shorten transmission delay.
1 . A first node for wireless communications, comprising:
a first receiver, receiving a first data unit set through a second logical channel, the first data unit set comprising at least one data unit;
a first transmitter, transmitting a second data unit set through a first logical channel, the second data unit set comprising at least one data unit;
a first processor, determining a first link failure; as a response to the behavior of determining the first link failure, generating a first control message; and
the first transmitter, transmitting the first control message;
wherein the first control message is used to indicate that a third data unit set is not successfully transmitted; any data unit in the third data unit set belongs to the first data unit set; any bit in the second data unit set belongs to the first data unit set; and a data unit comprised in the first logical channel is transmitted via the first link at air interface.
2 . The first node according to claim 1 , comprising:
the first receiver, receiving a second control message;
wherein the second control message indicates that a fourth data unit set is not successfully received; the fourth data unit set belongs to the second data unit set; any data unit in the fourth data unit set comprises at least partial bits of a data unit in the third data unit set.
3 . The first node according to claim 1 , comprising:
the first transmitter, transmitting a third control message;
wherein the third control message indicates that the first data unit set is successfully received.
4 . The first node according to claim 1 , wherein the third data unit set comprises a fifth data unit set;
wherein any bit in the fifth data unit set belongs to the first data unit set and at least partial bits do not belong to the second data unit set; any data unit in the fifth data unit set is mapped to the first logical channel.
5 . The first node according to claim 1 , wherein the first control message is transmitted through the second logical channel;
wherein the second logical channel is mapped to the first logical channel.
6 . The first node according to claim 1 , wherein the first control message indicates that a sixth data unit set is not successfully received;
wherein the sixth data unit set is received through the second logical channel and does not belong to the first data unit set.
7 . The first node according to claim 1 , wherein the first control message indicates the first link failure.
8 . A second node for wireless communications, comprising:
a second transmitter, transmitting a first data unit set through a second logical channel, the first data unit set comprising at least one data unit; and
a second receiver, receiving a first control message;
wherein a second data unit set is transmitted through a first logical channel, and the second data unit set comprises at least one data unit; a first link is determined as failed; as a response to the behavior of the first link being determined as failed, the first control message is generated; the first control message is used to indicate that a third data unit set is not successfully transmitted; any data unit in the third data unit set belongs to the first data unit set; any bit in the second data unit set belongs to the first data unit set; and a data unit comprised in the first logical channel is transmitted via the first link at air interface.
9 . The second node according to claim 8 , wherein a second control message is received;
wherein the second control message indicates that a fourth data unit set is not successfully received; the fourth data unit set belongs to the second data unit set; any data unit in the fourth data unit set comprises at least partial bits of a data unit in the third data unit set.
10 . The second node according to claim 8 , comprising:
the second receiver, receiving a third control message;
wherein the third control message indicates that the first data unit set is successfully received.
11 . The second node according to claim 8 , wherein the third data unit set comprises a fifth data unit set;
wherein any bit in the fifth data unit set belongs to the first data unit set and at least partial bits do not belong to the second data unit set; and any data unit in the fifth data unit set is mapped to the first logical channel.
12 . The second node according to claim 8 , wherein the first control message is transmitted through the second logical channel;
wherein the second logical channel is mapped to the first logical channel.
13 . The second node according to claim 8 , wherein the first control message indicates that a sixth data unit set is not successfully received;
wherein the sixth data unit set is received through the second logical channel and does not belong to the first data unit set.
14 . The second node according to claim 8 , wherein the first control message indicates the first link failure.
15 . A method in a first node for wireless communications, comprising:
receiving a first data unit set through a second logical channel, the first data unit set comprising at least one data unit;
transmitting a second data unit set through a first logical channel, the second data unit set comprising at least one data unit;
determining a first link failure; as a response to the behavior of determining the first link failure, generating a first control message; and
transmitting a first radio signal, the first radio signal carrying the first control message;
wherein the first control message is used to indicate that a third data unit set is not successfully transmitted; any data unit in the third data unit set belongs to the first data unit set; any bit in the second data unit set belongs to the first data unit set; and a data unit comprised in the first logical channel is transmitted via the first link at air interface.
16 . The method in a first node according to claim 15 comprising:
receiving a second control message;
wherein the second control message indicates that a fourth data unit set is not successfully received; the fourth data unit set belongs to the second data unit set; any data unit in the fourth data unit set comprises at least partial bits of a data unit in the third data unit set.
17 . The method in a first node according to claim 15 , comprising:
transmitting a third control message;
wherein the third control message indicates that the first data unit set is successfully received.
18 . The method in a first node according to claim 15 , wherein the third data unit set comprises a fifth data unit set;
wherein any bit in the fifth data unit set belongs to the first data unit set and at least partial bits do not belong to the second data unit set; any data unit in the fifth data unit set is mapped to the first logical channel.
19 . The method in a first node according to claim 15 , wherein the first control message is transmitted through the second logical channel;
wherein the second logical channel is mapped to the first logical channel.
20 . The method in a first node according to claim 15 , wherein the first control message indicates that a sixth data unit set is not successfully received;
wherein the sixth data unit set is received through the second logical channel and does not belong to the first data unit set.