# US 2019/0173719 A1 · Downlink Signal Sending Method, Downlink Signal Receiving Method, Transmit End Device, and Receive End Device

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- Number: US 2019/0173719 A1
- Document ID: US20190173719A1
- Status: Published application
- Kind: A1
- Application number: 16/270,647
- Filed: 2019-02-08
- Published: 2019-06-06
- Earliest claimed: 2016-08-11
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Yi QIN; Zhongfeng LI
- Web page: https://patentgrep.com/patent/US20190173719A1

## CPC

- H04L 27/26136: {Pilot sequence conveying additional information}
- H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length}
- H04J 11/0069: {Cell search, i.e. determining cell identity [cell-ID] (design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655)}
- H04J 11/0073: {Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group}
- H04J 11/0076: {Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/2676: {Blind, i.e. without using known symbols}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

The present disclosure includes example downlink signal sending methods, downlink signal receiving methods, and devices. In one example method a transmit end device indicates position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain. The transmit end device can then send a frame including the first signal and the second signal. In embodiments of the present invention, position information of a synchronization signal in time domain can be indicated, and sending of a single-symbol synchronization signal is also supported.

## Claims

### Claim 1

A downlink signal sending method, wherein the method comprises:
indicating, by a transmit end device, position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain; and
sending a frame comprising the first signal and the second signal.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the position relationship between the first signal and the second signal in at least one of frequency domain or time domain comprises a relative position relationship between the first signal and the second signal in the at least one frequency domain or time domain.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the indicating, by a transmit end device, position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain comprises:
indicating, by the transmit end device, the position information of the at least one first signal or the second signal in time domain based on a frequency difference or a subcarrier sequence number difference between a subcarrier occupied by the second signal and a corresponding subcarrier occupied by the first signal.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the indicating, by a transmit end device, position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain comprises:
indicating, by the transmit end device, the position information of the at least one first signal or the second signal in time domain based on a time difference or a symbol sequence number difference between a symbol occupied by the second signal and a symbol occupied by the first signal.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the indicating, by a transmit end device, position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one frequency domain or time domain comprises:
indicating, by the transmit end device, the position information of the at least one first signal or the second signal in time domain based on a frequency difference or a resource block sequence number difference between a resource block occupied by the second signal and a corresponding resource block occupied by the first signal.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the indicating, by a transmit end device, position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain comprises:
indicating, by the transmit end device, the position information of the at least one first signal or the second signal in time domain based on a time difference or a resource block sequence number difference between a resource block occupied by the second signal and a corresponding resource block occupied by the first signal.

### Claim 7

A transmit end device, comprising:
at least one processor, the at least one processor configured to indicate position information of at least one of a first signal or a second signal in time domain based on a position relationship between the first signal and the second signal in at least one of frequency domain or time domain; and
a transmitter, the transmitter configured to send a frame comprising the first signal and the second signal.

### Claim 8 (depends on 7)

The transmit end device according to claim 7, wherein the at least one processor is configured to indicate the position information of the at least one first signal or the second signal in time domain based on a frequency difference or a subcarrier sequence number difference between a subcarrier occupied by the second signal and a corresponding subcarrier occupied by the first signal.

### Claim 9 (depends on 7)

The transmit end device according to claim 7, wherein the at least one processor is configured to indicate the position information of the first signal or the second signal in time domain based on a frequency difference or a resource block sequence number difference between a resource block occupied by the second signal and a corresponding resource block occupied by the first signal.

### Claim 10

A receive end device, comprising:
a receiver, the receiver configured to receive a frame comprising a first signal and a second signal; and
at least one processor, the at least one processor configured to:
obtain a position relationship between the first signal and the second signal in at least one of a frequency domain or time domain; and
determine position information of at least one of the first signal or the second signal in time domain based on the position relationship between the first signal and the second signal in at least one of frequency domain or time domain.

### Claim 11 (depends on 10)

The receive end device according to claim 10, wherein the at least one processor is further configured to determine the position information of the at least one first signal or the second signal in time domain based on a frequency difference or a subcarrier sequence number difference between a subcarrier occupied by the second signal and a subcarrier occupied by the first signal.

### Claim 12 (depends on 10)

The receive end device according to claim 10, wherein the at least one processor is further configured to indicate the position information of the at least one first signal or the second signal in time domain based on a frequency difference or a resource block sequence number difference between a resource block occupied by the second signal and a corresponding resource block occupied by the first signal.