# US 12,764,688 B2 · Timing determination method and device, communication node and storage medium

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- Number: US 12,764,688 B2
- Document ID: US12764688B2
- Status: Granted
- Kind: B2
- Application number: 18/260,280
- Filed: 2021-12-30
- Published: 2024-02-22
- Granted: 2026-10-13
- Earliest claimed: 2021-01-04
- Assignees: Zte Corporation
- Applicants: Zte Corporation
- Inventors: Feng Bi; Weimin Xing; Youxiong Lu; Ting Miao; Wenhao Liu
- Web page: https://patentgrep.com/patent/US12764688B2

## CPC

- H04W 56/0045: {compensating for timing error by altering transmission time}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Provided are a timing determination method and device, a communication node and a storage medium. The timing determination method includes: determining a timing parameter; and determining transmission timing of a target node according to the timing parameter, where the transmission timing includes at least one of a time difference between first timing and second timing, downlink transmit timing (DTT) or uplink transmit timing (UTT).

## Claims

### Claim 1

A timing determination method, comprising:
determining a timing parameter; and
determining transmission timing of a target node according to the timing parameter, wherein the transmission timing comprises at least one of: a time difference between first timing and second timing, downlink transmit timing (DTT) or uplink transmit timing (UTT);
wherein the time difference between first timing and second timing refers to a time difference between the DTT of a serving cell and downlink receive timing (DRT) of an integrated access and backhaul (IAB) node, the DTT refers to DTT of the IAB node, and the UTT refers to UTT of the IAB node;
wherein the transmission timing comprises a timing argument;
wherein the timing argument is determined according to at least one of the following manners:
Tdelta=(Ndelta+Tdelta·Gstep)·Tc;
Tdelta=(−NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc; or
Tdelta=(NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc;
wherein Tdelta denotes the timing argument, NTA denotes a timing advance adjustment number or a timing lag adjustment number, NTA,offset denotes a timing advance offset or a timing lag offset, Tc denotes a time unit, Tdelta denotes a timing argument index value, Ndelta denotes a timing argument offset, and Gstep denotes a timing argument granularity.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the timing parameter comprises at least one of:
a timing advance, the timing argument or a time difference parameter.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the first timing is DTT of the serving cell or a first parent node, and the second timing is DRT of the target node.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the timing parameter comprises a timing advance; and
the method further comprises:
determining the timing advance according to at least one of a timing advance offset, a timing advance index or a timing advance granularity.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the timing parameter comprises a timing argument; and
the method further comprises:
determining the timing argument according to at least one of a timing argument offset, a timing argument index or a timing argument granularity.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the timing parameter comprises a time difference parameter;
wherein the time difference parameter comprises at least one of:
propagation time between a first parent node and a second parent node;
a time difference between the first timing and the second timing determined by the first parent node;
a number of advanced or lagged orthogonal frequency-division multiplexing (OFDM) symbols of third timing of the target node relative to fourth timing of the target node;
time of the advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node; or
an advanced or lagged subcarrier spacing of the third timing of the target node relative to the fourth timing of the target node.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the propagation time and the time difference between the first timing and the second timing determined by the first parent node are configured by a serving cell or configured by the first parent node.

### Claim 8 (depends on 6)

The method according to claim 6, wherein the time of the OFDM symbols is determined according to a cyclic prefix duration and a symbol pure duration;
wherein the cyclic prefix duration comprises at least one of: a zero-duration cyclic prefix, a normal cyclic prefix or an extended cyclic prefix; and
the symbol pure duration is equal to a reciprocal of the subcarrier spacing.

### Claim 9 (depends on 6)

The method according to claim 6, wherein the number of advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node comprises: at least one of:
a number of advanced or lagged OFDM symbols of the UTT of the target node relative to a timing advance of the target node;
a number of advanced or lagged OFDM symbols of the UTT of the target node relative to the DTT of the target node;
a number of advanced or lagged OFDM symbols of URT of the target node relative to DRT of the target node;
a number of advanced or lagged OFDM symbols of the UTT of the target node relative to the URT of the target node; or
a number of advanced or lagged OFDM symbols of the DTT of the target node relative to the DRT of the target node.

### Claim 10 (depends on 6)

The method according to claim 6, further comprising: determining the number of advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node according to a predefined manner; and
the determining the number of advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node according to the predefined manner comprises:
determining a default value of the number of OFDM symbols according to a node physical distance between the first parent node and the target node.

### Claim 11 (depends on 6)

The method according to claim 6, further comprising:
determining the number of advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node according to configuration signaling;
wherein the configuration signaling comprises physical-layer signaling, medium access control (MAC) layer signaling, radio resource control (RRC) signaling and Operation Administration and Maintenance (OAM) signaling.

### Claim 12 (depends on 1)

The method according to claim 1, wherein the transmission timing comprises the time difference between the first timing and the second timing;
wherein the time difference is determined according to at least one of the following manners:
TD=TA/2; TD=TA;
TD=TA/2−Tg/2; TD=TA/2+Tdelta,
TD=−|TA|/2+Tg/2; TD=−|TA|/2+Tdelta;
TD=−TA/2+Tg/2; TD=−TA/2+Tdelta;
TD=TA/2+SN·ST; TD=TA+SN·ST;
TD=TA/2−Tg/2+SN·ST; TD=TA/2+Tdelta+SN·ST;
TD=−|TA|/2+Tg/2+SN·ST; TD=−|TA|/2+Tdelta+SN·ST;
TD=−TA/2−Tg/2+SN·ST; TD=−TA/2+Tdelta+SN·ST;
TD=TA/2+TPup/2; TD=TA/2+TDup/2;
TD=−|TA|/2+TPup/2; TD=−|TA|/2+TDup/2;
TD=−TA/2+TPup/2; TD=−TA/2+TDup/2;
TD=TA/2−(SN·ST−TPup)/2; TD=TA/2−(SN·ST−TDup)/2; or
TD=TA/2−TPup/2; TD=TA/2−TDup/2;
wherein TD denotes the time difference between the first timing and the second timing, the first timing is DTT of a serving cell or a first parent node, and the second timing is DRT of the target node; TA denotes a timing advance, Tg denotes a time difference between uplink receive timing (URT) of the first parent node and the DTT of the first parent node, SN denotes the number of advanced or lagged OFDM symbols of third timing of the target node relative to fourth timing of the target node, ST denotes time of the advanced or lagged OFDM symbols of the third timing of the target node relative to the fourth timing of the target node, TPup denotes propagation time between the first parent node and a second parent node, TDup denotes a time difference between the first timing and the second timing determined by the first parent node, and Tdelta denotes a timing argument.

### Claim 13 (depends on 1)

The method according to claim 1, wherein the transmission timing comprises a timing advance;
wherein the timing advance is determined according to at least one of the following manners:
TA=NTA·Tc;
TA=(NTA+NTA,offset)·Tc;
TA=−NTA·Tc; or
TA=−(NTA+NTA,offset)·Tc;
wherein TA denotes the timing advance, NTA denotes a timing advance adjustment number or a timing lag adjustment number, NTA,offset denotes a timing advance offset or a timing lag offset, and Tc denotes a time unit.

### Claim 14 (depends on 1)

The method according to claim 1, wherein a timing mode is associated with a physical parameter of first type;
wherein the physical parameter of first type comprises at least one of a timing argument offset, a timing argument index or a timing argument granularity.

### Claim 15 (depends on 1)

The method according to claim 1, wherein determining the transmission timing of the target node according to the timing parameter comprises:
determining DRT of the target node and the time difference between the first timing and the second timing according to the timing parameter; and
determining the DTT of the target node according to the DRT of the target node and the time difference.

### Claim 16 (depends on 1)

The method according to claim 1, wherein determining the transmission timing of the target node according to the timing parameter comprises:
determining DRT of the target node, a timing advance and the DTT of the target node according to the timing parameter; and
determining the UTT of the target node according to the DRT of the target node, the timing advance and the DTT of the target node.

### Claim 17 (depends on 1)

The method according to claim 1, wherein a timing mode is associated with a physical parameter of second type, wherein the physical parameter of second type comprises: at least one of a timing advance, the timing argument, a time difference, DRT or UTT.

### Claim 18

A communication node, comprising a memory, a processor and a computer program stored in the memory and executable by the processor, wherein the processor, when executing the computer program, implements a timing determination method, wherein the timing determination method comprises:
determining a timing parameter; and
determining transmission timing of a target node according to the timing parameter, wherein the transmission timing comprises at least one of: a time difference between first timing and second timing, downlink transmit timing (DTT) or uplink transmit timing (UTT);
wherein the time difference between first timing and second timing refers to a time difference between the DTT of a serving cell and downlink receive timing (DRT) of an integrated access and backhaul (IAB) node, the DTT refers to DTT of the IAB node, and the UTT refers to UTT of the IAB node;
wherein the transmission timing comprises a timing argument;
wherein the timing argument is determined according to at least one of the following manners:
Tdelta=(Ndelta+Tdelta·Gstep)·Tc;
Tdelta=(−NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc; or
Tdelta=(NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc;
wherein Tdelta denotes the timing argument, NTA denotes a timing advance adjustment number or a timing lag adjustment number, NTA,offset denotes a timing advance offset or a timing lag offset, Tc denotes a time unit, Tdelta denotes a timing argument index value, Ndelta denotes a timing argument offset, and Gstep denotes a timing argument granularity.

### Claim 19

A non-transitory computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements a timing determination method, wherein the timing determination method comprises:
determining a timing parameter; and
determining transmission timing of a target node according to the timing parameter, wherein the transmission timing comprises at least one of: a time difference between first timing and second timing, downlink transmit timing (DTT) or uplink transmit timing (UTT);
wherein the time difference between first timing and second timing refers to a time difference between the DTT of a serving cell and downlink receive timing (DRT) of an integrated access and backhaul (IAB) node, the DTT refers to DTT of the IAB node, and the UTT refers to UTT of the IAB node;
wherein the transmission timing comprises a timing argument;
wherein the timing argument is determined according to at least one of the following manners:
Tdelta=(Ndelta+Tdelta·Gstep)·Tc;
Tdelta=(−NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc; or
Tdelta=(NTA,offset/2+Ndelta+Tdelta·Gstep)·Tc;
wherein Tdelta denotes the timing argument, NTA denotes a timing advance adjustment number or a timing lag adjustment number, NTA,offset denotes a timing advance offset or a timing lag offset, Tc denotes a time unit, Tdelta denotes a timing argument index value, Ndelta denotes a timing argument offset, and Gstep denotes a timing argument granularity.