Link recovery in wireless communications
A wireless communication method includes transmitting, by a first communication node, a first type of random access preamble, monitoring, by the first communication node, a link recovery confirmation information, performing, by the first communication node, after meeting a first type of condition, and the first type of condition includes detecting the link recovery confirmation information, an operation including performing a transmission on an outbound channel to a second communication node using a spatial filter determined by the first type of random access preamble.
1. A wireless communication method, comprising:
performing, by a user device, a random access preamble transmission to a network node;
monitoring, by the user device, a downlink control information with a cyclic redundancy check (CRC) scrambled by a first type of radio network temporary identifier; and
performing, by the user device after detecting the downlink control information with the CRC scrambled by the first type of radio network temporary identifier, a transmission on a channel using a same spatial filter as that for the random access preamble transmission, wherein a target power associated with the transmission on the channel is determined based on a specific index value indicating a target power in a target power set, and wherein a closed loop power control of the channel has the specific index value, the specific index value being equal to zero.
2. The method of claim 1 , wherein a cell of the random access preamble transmission is same as a cell of the channel.
3. The method of claim 1 , wherein the transmission on the channel is performed until a reconfiguration or activation of a spatial relation associated with the channel.
4. The method of claim 1 , wherein a reference signal of a path loss estimation associated with the channel is based on a downlink reference signal with an index q new provided by higher layer.
5. The method of claim 1 , wherein the closed loop power equals to a ramp-up value associated with the random access preamble transmission plus the value indicated by a transmission power command (TPC) in one downlink control information.
6. A wireless communication method, comprising:
receiving, by a network node, a random access preamble transmission from a user device;
transmitting a downlink control information with cyclic redundancy check (CRC) scrambled by a first type of radio network temporary identifier to the user device; and
receiving, by the network node in response to the downlink indictor with the CRC scrambled by the first type of radio network temporary identifier, a transmission on a channel using a same spatial filter as that for the random access preamble transmission, wherein a target power associated with the transmission on the channel is determined based on a specific index value indicating a target power in a target power set, and wherein a closed loop power control of the channel has the specific index value, the specific index value being equal to zero.
7. The method of claim 6 , wherein a cell of the random access preamble transmission is same as a cell of the channel.
8. The method of claim 6 , wherein a reference signal of a path loss estimation associated with the channel is based on a downlink reference signal with an index q new provided by higher layer.
9. The method of claim 6 , wherein the closed loop power control of the channel equals to a ramp-up value associated with the random access preamble transmission plus the value indicated by a transmission power command (TPC) in one downlink control information.
10. An apparatus comprising:
a processor, wherein the processor is configured to:
perform a random access preamble transmission to a network node;
monitor a downlink control information with a cyclic redundancy check (CRC) scrambled by a first type of radio network temporary identifier; and
perform, after detecting the downlink control information with the cyclic redundancy check (CRC) scrambled by the first type of radio network temporary identifier, a transmission on a channel using a same spatial filter as that for the random access preamble transmission, wherein a target power associated with the transmission on the channel is determined based on a specific index value indicating a target power in a target power set, and wherein a closed loop power control of the channel has the specific index value, the specific index value being equal to zero.
11. The apparatus of claim 10 , wherein a cell of the random access preamble transmission is same as a cell of the channel.
12. The apparatus of claim 10 , wherein the processor is configured to perform the transmission on the channel until a reconfiguration or activation of a spatial relation associated with the channel.
13. The apparatus of claim 10 , wherein a reference signal of a path loss estimation associated with the channel is based on a downlink reference signal with an index q new provided by higher layer.
14. The apparatus of claim 10 , wherein the closed loop power control of the channel equals to a ramp-up value associated with the random access preamble transmission plus the value indicated by a transmission power command (TPC) in one downlink control information.
15. An apparatus comprising:
a processor, wherein the processor is configured to:
receive a random access preamble transmission from a user device;
transmit a downlink control information with cyclic redundancy check (CRC) scrambled by a first type of radio network temporary identifier to the user device; and
receive, in response the downlink control information with the CRC scrambled by the first type of radio network temporary identifier, a transmission on a channel using a same spatial filter as that for the random access preamble transmission, wherein a target power associated with the transmission on the channel is determined based on a specific index value indicating a target power in a target power set, and wherein a closed loop power control of the channel has the specific index value, the specific index value being equal to zero.
16. The apparatus of claim 15 , wherein a cell of the random access preamble transmission is same as a cell of the channel.
17. The apparatus of claim 15 , wherein a reference signal of a path loss estimation associated with the channel is based on a downlink reference signal with an index q new provided by higher layer.
18. The apparatus of claim 15 , wherein the closed loop power control of the channel equals to a ramp-up value associated with the random access preamble transmission plus the value indicated by a transmission power command (TPC) in one downlink control information.