Automatic gain control for sidelink communications
A wireless device may communicate with one or more other wireless devices via a sidelink. Automatic gain control (AGC) may be performed by a receiving wireless device. A symbol in a sidelink transmission may be duplicated for AGC if the sidelink transmission overlaps in time with the beginning of another sidelink transmission.
1 . A method comprising:
receiving, by a wireless device, one or more configuration parameters indicating a plurality of starting symbols in a slot;
transmitting or receiving, in the slot, and via a sidelink channel, a first signal comprising:
a transport block mapped to a plurality of symbols of the slot, wherein:
the plurality of symbols of the slot are based on the one or more configuration parameters,
the plurality of symbols of the slot comprises a first symbol and a second symbol,
the plurality of symbols of the slot excludes a third symbol of the slot and a fourth symbol of the slot,
the third symbol immediately precedes the first symbol, and
the fourth symbol immediately precedes the second symbol;
a duplication, in the third symbol, of the first symbol; and
a duplication, in the fourth symbol, of the second symbol.
2 . The method of claim 1 , further comprising:
receiving, via the sidelink channel, a second signal comprising:
a fifth symbol;
a duplication of the fifth symbol;
a sixth symbol; and
a duplication of the sixth symbol;
performing, based on a measurement of the duplication of the fifth symbol, a first automatic gain control (AGC) procedure; and
performing, based on a measurement of the duplication of the sixth symbol, a second AGC procedure.
3 . The method of claim 1 , wherein the duplication of the second symbol is associated with a second signal.
4 . The method of claim 1 , wherein the receiving the one or more configuration parameters comprises receiving one or more radio resource control (RRC) messages comprising the one or more configuration parameters.
5 . The method of claim 1 , wherein the plurality of starting symbols are associated with a plurality of listen-before-talk (LBT) opportunities for sidelink transmission in a shared spectrum.
6 . The method of claim 1 , wherein the transmitting or receiving the first signal comprises transmitting or receiving a transport block via at least one of:
a physical sidelink shared channel (PSSCH); or
a physical sidelink control channel (PSCCH).
7 . The method of claim 1 , further comprising performing, for a symbol in the slot, a listen-before-talk (LBT) procedure.
8 . The method of claim 1 , wherein the transmitting or receiving the first signal comprises:
transmitting, to a second wireless device, the first signal.
9 . The method of claim 1 , wherein the one or more configuration parameters further indicate an ending symbol for a sidelink transmission occasion in the slot.
10 . The method of claim 1 , wherein the duplication of the first symbol is for automatic gain control (AGC) and the duplication of the second symbol is for AGC.
11 . The method of claim 1 , further comprising:
performing, based on a measurement of the duplication of the first symbol, a first automatic gain control (AGC) procedure; and
performing, based on a measurement of the duplication of the second symbol, a second AGC procedure.
12 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed, cause the wireless device to:
receive one or more configuration parameters indicating a plurality of starting symbols in a slot; and
transmit or receive, in the slot, and via a sidelink channel, a first signal comprising:
a transport block mapped to a plurality of symbols of the slot, wherein:
the plurality of symbols of the slot are based on the one or more configuration parameters,
the plurality of symbols of the slot comprises a first symbol and a second symbol,
the plurality of symbols of the slot excludes a third symbol of the slot and a fourth symbol of the slot,
the third symbol immediately precedes the first symbol, and
the fourth symbol immediately precedes the second symbol;
a duplication, in the third symbol, of the first symbol; and
a duplication, in the fourth symbol, of the second symbol.
13 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
receive, via the sidelink channel, a second signal comprising:
a fifth symbol;
a duplication of the fifth symbol;
a sixth symbol; and
a duplication of the sixth symbol;
perform, based on a measurement of the duplication of the fifth symbol, a first automatic gain control (AGC) procedure; and
perform, based on a measurement of the duplication of the sixth symbol, a second AGC procedure.
14 . The wireless device of claim 12 , wherein the duplication of the second symbol is associated with a second signal.
15 . The wireless device of claim 12 , wherein the wherein the instructions, when executed by the one or more processors, cause the wireless device to receive the one or more configuration parameters by receiving one or more radio resource control (RRC) messages comprising the one or more configuration parameters.
16 . The wireless device of claim 12 , wherein the plurality of starting symbols are associated with a plurality of listen-before-talk (LBT) opportunities for sidelink transmission in a shared spectrum.
17 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit or receive the first signal by transmitting or receiving a transport block via at least one of:
a physical sidelink shared channel (PSSCH); or
a physical sidelink control channel (PSCCH).
18 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to perform, for a symbol in the slot, a listen-before-talk (LBT) procedure.
19 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, cause the wireless device to transmit or receive the first signal by:
transmitting, to a second wireless device, the first signal.
20 . The wireless device of claim 12 , wherein the one or more configuration parameters further indicate an ending symbol for a sidelink transmission occasion in the slot.
21 . The wireless device of claim 12 , wherein the duplication of the first symbol is for automatic gain control (AGC) and the duplication of the second symbol is for AGC.
22 . The wireless device of claim 12 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
perform, based on a measurement of the duplication of the first symbol, a first automatic gain control (AGC) procedure; and
perform, based on a measurement of the duplication of the second symbol, a second AGC procedure.
23 . A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:
receive one or more configuration parameters indicating a plurality of starting symbols in a slot; and
transmit or receive, in the slot, and via a sidelink channel, a first signal comprising:
a transport block mapped to a plurality of symbols of the slot, wherein:
the plurality of symbols of the slot are based on the one or more configuration parameters,
the plurality of symbols of the slot comprises a first symbol and a second symbol,
the plurality of symbols of the slot excludes a third symbol of the slot and a fourth symbol of the slot,
the third symbol immediately precedes the first symbol, and
the fourth symbol immediately precedes the second symbol;
a duplication, in the third symbol, of the first symbol; and
a duplication, in the fourth symbol, of the second symbol.
24 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:
receive, via the sidelink channel, a second signal comprising:
a fifth symbol;
a duplication of the fifth symbol;
a sixth symbol; and
a duplication of the sixth symbol;
perform, based on a measurement of the duplication of the fifth symbol, a first automatic gain control (AGC) procedure; and
perform, based on a measurement of the duplication of the sixth symbol, a second AGC procedure.
25 . The non-transitory computer-readable medium of claim 23 , wherein the duplication of the second symbol is associated with a second signal.
26 . The non-transitory computer-readable medium of claim 23 , wherein the wherein the instructions, when executed, configure the wireless device to receive the one or more configuration parameters by receiving one or more radio resource control (RRC) messages comprising the one or more configuration parameters.
27 . The non-transitory computer-readable medium of claim 23 , wherein the plurality of starting symbols are associated with a plurality of listen-before-talk (LBT) opportunities for sidelink transmission in a shared spectrum.
28 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, configure the wireless device to transmit or receive the first signal by transmitting or receiving a transport block via at least one of:
a physical sidelink shared channel (PSSCH); or
a physical sidelink control channel (PSCCH).
29 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to perform, for a symbol in the slot, a listen-before-talk (LBT) procedure.
30 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, configure the wireless device to transmit or receive the first signal by:
transmitting, to a second wireless device, the first signal.
31 . The non-transitory computer-readable medium of claim 23 , wherein the one or more configuration parameters further indicate an ending symbol for a sidelink transmission occasion in the slot.
32 . The non-transitory computer-readable medium of claim 23 , wherein the duplication of the first symbol is for automatic gain control (AGC) and the duplication of the second symbol is for AGC.
33 . The non-transitory computer-readable medium of claim 23 , wherein the instructions, when executed, further configure the wireless device to:
perform, based on a measurement of the duplication of the first symbol, a first automatic gain control (AGC) procedure; and
perform, based on a measurement of the duplication of the second symbol, a second AGC procedure.