Method and apparatus for transmitting and receiving sounding reference signal
Embodiments of the present application provide a method and an apparatus for transmitting and receiving a sounding reference signal, the transmitting method including: receiving, by a terminal equipment, configuration information of one or more sounding reference signals used for antenna switching transmitted by a network device; and transmitting, by the terminal equipment, transmit a sounding reference signal to the network device according to the configuration information by using one or more sounding reference signal resources, wherein a guard period is configured between adjacent sounding reference signal resources when transmitting the sounding reference signal for antennas of the terminal equipment.
1 . An apparatus for transmitting a sounding reference signal, which is configured in a terminal equipment, comprising:
a receiver configured to receive configuration information of one or more sounding reference signal resources; and
a transmitter configured to transmit a sounding reference signal used for antenna switching according to the configuration information by using the one or more sounding reference signal resources, wherein a guard period is configured between sounding reference signal resources in one or more sounding reference signal resource sets,
wherein at a sub-carrier spacing being 480 kHz, the guard period includes at least 7 symbols, and at the sub-carrier spacing being 960 kHz, the guard period includes at least 14 symbols.
2 . The apparatus according to claim 1 , wherein in one round for antenna switching performed for all antennas of the terminal equipment, the sounding reference signal is transmitted.
3 . The apparatus according to claim 1 , wherein sounding reference signal resources are two sounding reference signal resources in a same sounding reference signal resource set; or
sounding reference signal resources are two sounding reference signal resources in different sounding reference signal resource sets.
4 . The apparatus according to claim 1 , wherein a number Y of symbols of the guard period is predefined, or is configured by a network device, or is predetermined by the terminal equipment.
5 . The apparatus according to claim 1 , wherein sounding reference signal resource sets of a same type are configurable in different slots, or sounding reference signal resource sets of different types are configurable in a same slot.
6 . The apparatus according to claim 1 , wherein a same sounding reference signal resource is configurable on symbols of different slots.
7 . The apparatus according to claim 1 , wherein the transmitter is further configured to, for a same sounding reference signal resource that is configured on symbols of different slots, delay the sounding reference signal resource by one or more symbols such that the sounding reference signal resource is located in a same slot.
8 . The apparatus according to claim 1 , wherein the transmitter is further configured to, after transmitting the sounding reference signal, on one or more consecutive symbols immediately adjacent to a sounding reference signal resource of the sounding reference signal, transmit control information and/or data information by using an antenna identical to an antenna of the sounding reference signal resource.
9 . The apparatus according to claim 1 , wherein the receiver further receives downlink control information transmitted by a network device; and
the transmitter is further configured to transmit the sounding reference signal to the network device by using the one or more sounding reference signal resources according to triggering of the downlink control information.
10 . The apparatus according to claim 1 , wherein the sounding reference signal is transmitted on any one or more symbols in a slot.
11 . The apparatus according to claim 1 , wherein the guard period includes multiple symbols, the number of the symbols being different for different sub-carrier spacings.
12 . The apparatus according to claim 1 , wherein the apparatus further comprises:
processor circuitry configured to, before one round of transmitting the sounding reference signal for antennas of the terminal equipment, determine whether an antenna used by a first sounding reference signal resource in the round is the same as an antenna used by a resource preceding the first sounding reference signal resource; and
in response to determining that the antenna used by the first sounding reference signal resource in the round and the antenna used by the resource preceding the first sounding reference signal resource are not same, set the guard period between the first sounding reference signal resource and the resource; and in response to determining that the antenna used by the first sounding reference signal resource in the round and the antenna used by the resource preceding the first sounding reference signal resource are same, set no guard period between the first sounding reference signal resource and the resource.
13 . The apparatus according to claim 1 , wherein the apparatus further comprises:
processor circuitry configured to, after one round of transmitting the sounding reference signal for antennas of the terminal equipment, determine whether an antenna used by a last sounding reference signal resource in the round is the same as an antenna used by a resource following the last sounding reference signal resource; and
in response to determining that the antenna used by the last sounding reference signal resource in the round and the antenna used by the resource following the last sounding reference signal resource are not same, set the guard period between the last sounding reference signal resource and the resource; and in response to determining that the antenna used by the last sounding reference signal resource in the round and the antenna used by the resource following the last sounding reference signal resource are same, set no guard period between the last sounding reference signal resource and the resource.
14 . An apparatus for receiving a sounding reference signal, which is configured in a network device, comprising:
a transmitter configured to transmit configuration information of one or more sounding reference signal resources to a terminal equipment; and
a receiver configured to receive a sounding reference signal used for antenna switching transmitted by the terminal equipment according to the configuration information by using the one or more sounding reference signal resources, wherein a guard period is configured between sounding reference signal resources in one or more sounding reference signal resource sets,
wherein at a sub-carrier spacing being 480 kHz, the guard period includes at least 7 symbols, and at the sub-carrier spacing being 960 kHz, the guard period includes at least 14 symbols.
15 . The apparatus according to claim 14 , wherein the transmitter is further configured to transmit downlink control information to the terminal equipment, the downlink control information triggering the terminal equipment to transmit the sounding reference signal to the network device by using the sounding reference signal resources.
16 . The apparatus according to claim 14 , wherein the apparatus further comprises:
processor circuitry configured to determine a transmission period of the sounding reference signal according to a time length of one of the one or more sounding reference signal resources that is used for transmitting the sounding reference signal and the guard period.
17 . The apparatus according to claim 16 , wherein for the same sub-carrier spacing,
for a sum of the time length of the sounding reference signal resource and the guard period being greater than N slots, the transmission period of the sounding reference signal is configured as N+1 by radio resource control signaling; where, N is an integer greater than or equal to 1 and less than or equal to 2560.
18 . A communication system, comprising:
a terminal equipment configured to receive configuration information of one or more sounding reference signal resources, and transmit a sounding reference signal used for antenna switching according to the configuration information by using the one or more sounding reference signal resources, wherein a guard period is configured between sounding reference signal resources in one or more sounding reference signal resource sets, wherein at a sub-carrier spacing being 480 kHz, the guard period includes at least 7 symbols, and at the sub-carrier spacing being 960 kHz, the guard period includes at least 14 symbols; and
a network device configured to transmit configuration information of the one or more sounding reference signal resources to the terminal equipment, and receive the sounding reference signal used for antenna switching transmitted by the terminal equipment according to the configuration information by using the one or more sounding reference signal resources.