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US 11,962,449 B2Granted
Method and apparatus for obtaining reference signal
AssigneeHuawei Technologies Co., Ltd.
InventorsLixia Xue, Xu Zhang, Yongxing Zhou
Life of this patent
Estimating the term…
Abstract
This application relates to the mobile communications field, and in particular, to a technology for obtaining a reference signal in a wireless communications system. In one example method for obtaining a reference signal, a terminal device obtains position offset information. The terminal device obtains a first sequence based on the position offset information. The terminal device demodulates, by using the first sequence, a control channel signal carried in a control channel resource set to obtain downlink control information.
Claims12
A method, comprising:
- obtaining position offset information, wherein the position offset information comprises a first position and a first offset, wherein the first position is a quantity of subcarriers by which a center subcarrier of a reference point of a first broadcast channel is offset from a center subcarrier of a reference point of a second broadcast channel carrying a master information block (MIB), and wherein the first offset comprises a quantity of subcarriers by which a smallest subcarrier of a control channel resource set is offset from the smallest subcarrier in a bandwidth part of the second broadcast channel, and a quantity of subcarriers by which the smallest subcarrier in the bandwidth part of the second broadcast channel is offset from the center subcarrier of a resource on which the reference point of the second broadcast channel;
- obtaining a demodulation reference signal sequence based on the position offset information;
- and
- demodulating, by using the demodulation reference signal sequence, a control channel in the control channel resource set, to obtain downlink control information.
1 more element
A method, comprising:
- determining a demodulation reference signal sequence corresponding to position offset information, wherein the position offset information comprises a first position and a first offset, wherein the first position is a quantity of subcarriers by which a center subcarrier of a reference point of a first broadcast channel is offset from a center subcarrier of a reference point of a second broadcast channel carrying a master information block (MIB), and wherein the first offset comprises a quantity of subcarriers by which a smallest subcarrier of a control channel resource set is offset from the smallest subcarrier in a bandwidth part of the second broadcast channel, and a quantity of subcarriers by which the smallest subcarrier in the bandwidth part of the second broadcast channel is offset from the center subcarrier of a resource on which the reference point of the second broadcast channel;
- and
- mapping the demodulation reference signal sequence to at least one resource element in the control channel resource set, wherein the at least one resource element is used for transmitting a demodulation reference signal corresponding to the demodulation reference signal sequence.
An apparatus, comprising at least one processors, wherein:
- the at least one processor configured to:
- obtain position offset information, wherein the position offset information comprises a first position and a first offset, wherein the first position is a quantity of subcarriers by which a center subcarrier of a reference point of a first broadcast channel is offset from a center subcarrier of a reference point of a second broadcast channel carrying a master information block (MIB), and wherein the first offset comprises a quantity of subcarriers by which a smallest subcarrier of a control channel resource set is offset from the smallest subcarrier in a bandwidth part of the second broadcast channel, and a quantity of subcarriers by which the smallest subcarrier in the bandwidth part of the second broadcast channel is offset from the center subcarrier of a resource on which the reference point of the second broadcast channel;
- obtain a demodulation reference signal sequence based on the position offset information;
- and
- demodulate, by using the demodulation reference signal sequence, a control channel in the control channel resource set, to obtain downlink control information.
2 more elements
An apparatus, comprising at least one processors, wherein:
- the at least one processor configured to:
- determine a demodulation reference signal sequence corresponding to position offset information, wherein the position offset information comprises a first position and a first offset, wherein the first position is a quantity of subcarriers by which a center subcarrier of a reference point of a first broadcast channel is offset from a center subcarrier of a reference point of a second broadcast channel carrying a master information block (MIB), and wherein the first offset comprises a quantity of subcarriers by which a smallest subcarrier of a control channel resource set is offset from the smallest subcarrier in a bandwidth part of the second broadcast channel, and a quantity of subcarriers by which the smallest subcarrier in the bandwidth part of the second broadcast channel is offset from the center subcarrier of a resource on which the reference point of the second broadcast channel;
- and
- map the demodulation reference signal sequence to at least one resource element in the control channel resource set, wherein the at least one resource element is used for transmitting a demodulation reference signal corresponding to the demodulation reference signal sequence.
1 more element
Dependencies are inferred from the claim text.