Control signaling transmission method and apparatus
Embodiments of the present disclosure describe a control signaling reception method and apparatus. The method includes: receiving to-be-received control signaling using a control channel, wherein the control signaling carried on the control channel indicates operation of at least two terminal devices; and demodulating the to-be-received control signaling; wherein the control channel occupies a part of subcarriers in a system bandwidth in a frequency domain. According to the embodiments of the present disclosure, common control signaling that can indicate operation of multiple terminal devices and user dedicated control signaling that can indicate an operation behavior of only one terminal device are carried on different physical channels for transmission. In this way, different resource mapping manners and different signal processing manners can be used according to different transmission requirements, so as to optimally balance resource overheads and transmission reliability of different types of control signaling, thereby improving transmission resource use efficiency.
1. A control signaling transmission method, comprising:
receiving, by a terminal device, to-be-received control signaling using at least one control channel element on a control channel, wherein the control signaling carried on the control channel is common control information that indicates operation of at least two terminal devices and is carried on a different physical channel than dedicated control signaling indicating operation of the terminal device, and wherein the control signaling carried on the control channel indicates a time-frequency resource location, a transmission format, or a combination thereof of control information to be read by the at least two terminal devices; and
demodulating the to-be-received control signaling;
wherein the control channel occupies M subcarriers in a system bandwidth in a frequency domain, and M is a positive integer less than a total quantity of subcarriers comprised by the system bandwidth.
2. The method according to claim 1 , wherein the M subcarriers are located in a middle of the system bandwidth.
3. The method according to claim 1 , wherein a value of M is 72.
4. The method according to claim 1 , wherein the control channel and at least one of a data channel or a user dedicated control channel occupy a frequency domain resource using frequency division multiplexing.
5. The method according to claim 1 , wherein when the control channel alone cannot carry all the control signaling, the control signaling is carried on the control channel and another control channel, and the method further comprises: receiving the control signaling on the control channel and the another control channel.
6. The method according to claim 5 , wherein the control channel is further configured to carry resource parameters of the another control channel, and the method further comprises: receiving the resource parameters of the another control channel on the control channel.
7. The method according to claim 6 , wherein the resource parameters of the another control channel comprise one or more of the following parameters: a quantity of subcarriers occupied by the another control channel, a quantity of transmit antenna ports selected for the another control channel, pilot information of the another control channel, a quantity of time-frequency resources of the another control channel, a time-frequency resource mapping manner of the another control channel, a period of the another control channel, a subframe number of the another control channel, a timeslot number of the another control channel, a subcarrier number of the another control channel, a frequency band number of the another control channel, or power information of the another control channel.
8. The method according to claim 1 , wherein the control channel further carries a cell-specific reference signal, and the method further comprises: receiving the cell-specific reference signal on the control channel.
9. The method according to claim 1 , wherein parameters of the control channel are preset, and the parameters of the control channel comprise one or more of: a quantity of subcarriers occupied by the control channel, a quantity of selected antenna ports on the control channel that are used for transmission, pilot information, a time-frequency resource quantity, a time-frequency resource mapping manner of the control channel, a period, a subframe number, a timeslot number, a subcarrier number, a frequency band number, or power information.
10. A control signaling transmission apparatus, comprising:
a processor of a terminal device and a computer readable storage medium accessible to the processor, wherein the processor is configured to:
receive to-be-received control signaling using at least one control channel element on a control channel, wherein the control signaling carried on the control channel is common control information that indicates operation of at least two terminal devices and is carried on a different physical channel than dedicated control signaling indicating operation of the terminal device, and wherein the control signaling carried on the control channel indicates a time-frequency resource location, a transmission format, or a combination thereof of control information to be read by the at least two terminal devices; and
demodulate the to-be-received control signaling;
wherein the control channel occupies M subcarriers in a system bandwidth in a frequency domain, and M is a positive integer less than a total quantity of subcarriers comprised by the system bandwidth.
11. The apparatus according to claim 10 , wherein the M subcarriers are located in a middle of the system bandwidth.
12. The apparatus according to claim 10 , wherein a value of M is 72.
13. The apparatus according to claim 10 , wherein the control channel and at least one of a data channel or a user dedicated control channel occupy a frequency domain resource using frequency division multiplexing.
14. The apparatus according to claim 10 , wherein when the control channel alone cannot carry all the control signaling, the control signaling is carried on the control channel and another control channel, and the processor is configured to receive the control signaling on the control channel and the another control channel.
15. The apparatus according to claim 14 , wherein the control channel carries resource parameters of the another control channel, and the processor is further configured to receive the resource parameters of the another control channel on the control channel.
16. The apparatus according to claim 15 , wherein the resource parameters of the another control channel comprise one or more of the following parameters: a quantity of subcarriers occupied by the another control channel, a quantity of transmit antenna ports selected for the another control channel, pilot information of the another control channel, a quantity of time-frequency resources of the another control channel, a time-frequency resource mapping manner of the another control channel, a period of the another control channel, a subframe number of the another control channel, a timeslot number of the another control channel, a subcarrier number of the another control channel, a frequency band number of the another control channel, or power information of the another control channel.
17. The apparatus according to claim 10 , wherein the control channel further carries a cell-specific reference signal, and the processor is further configured to receive the cell-specific reference signal on the control channel.
18. The apparatus according to claim 10 , wherein parameters of the control channel are preset, and the parameters of the control channel comprise one or more of: a quantity of subcarriers occupied by the control channel, a quantity of selected antenna ports on the control channel that are used for transmission, pilot information, a time-frequency resource quantity, a time-frequency resource mapping manner of the control channel, a period, a subframe number, a timeslot number, a subcarrier number, a frequency band number, or power information.
19. The apparatus according to claim 10 , wherein the apparatus is a terminal device.
20. A non-transitory computer readable storage medium storing instructions which, when executed by a control signaling transmission apparatus, causes the control signaling transmission apparatus to perform operations comprising:
receiving, by a terminal device, to-be-received control signaling using at least one control channel element on a control channel, wherein the control signaling carried on the control channel is common control information that indicates operation of at least two terminal devices and is carried on a different physical channel than dedicated control signaling indicating operation of the terminal device, and wherein the control signaling carried on the control channel indicates a time-frequency resource location, a transmission format, or a combination thereof of control information to be read by the at least two terminal devices; and
demodulating the to-be-received control signaling;
wherein the control channel occupies M subcarriers in a system bandwidth in a frequency domain, and M is a positive integer less than a total quantity of subcarriers comprised by the system bandwidth.