CN113079580A

CN113079580A - Method and apparatus in a node used for wireless communication

Info

Publication number: CN113079580A
Application number: CN202010004808.2A
Authority: CN
Inventors: 蒋琦; 刘铮; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2021-07-06
Anticipated expiration: 2040-01-03
Also published as: CN113079580B

Abstract

A method and apparatus in a node used for wireless communication is disclosed. The first node firstly receives the first information and sends a first signal, then receives a second signal and sends a target signal in a second time window; a first sequence is used to generate the first signal and determine a first identity; the second signal carries the second identifier and a first indication; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; the second signal is used to determine whether an end time instant of the first time window is equal to a reference time instant, the first time length being used to determine a length of a time interval between a start time instant of the second time window and the reference time instant. The first indication is redesigned to optimize a rollback mechanism and improve system performance.

Description

Method and apparatus in a node used for wireless communication

Technical Field

The present invention relates to a transmission method and apparatus in a wireless communication system, and in particular, to a transmission method and apparatus in a Non-Terrestrial network (NTN) in wireless communication.

Background

In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of multiple application scenarios, a New air interface technology (NR, New Radio) (or 5G) is determined to be studied in 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 guilds, and standardization Work on NR starts after passing through WI (Work Item) of the New air interface technology (NR, New Radio) in 3GPP RAN #75 guilds.

In order to be able to adapt to various application scenarios and meet different requirements, the 3GPP RAN #75 time congress also passed a Non-Terrestrial Networks (NTN) research project under NR, which started in version R15. The decision to start the study of solutions in NTN networks was made on 3GPP RAN #79 full meeting, and then WI was initiated to standardize the related art in R16 or R17 release.

Disclosure of Invention

In the NTN network, when a User Equipment (UE) has a positioning capability and can estimate a transmission delay with a satellite, the UE can automatically Advance transmission when transmitting an uplink signal to the satellite, so as to determine and adjust a TA (Timing Advance) operation, thereby ensuring that a signal reaching the satellite can align with a Timing of the satellite.

In the conventional LTE (Long-Term Evolution) and 5G systems, due to the requirement of load adjustment, when the number of users accessing the base station side is large and the base station cannot respond one by one, the base station may indicate a BI (Backoff Indicator) in an RAR (Random Access Response). When the UE initiating the Random Access determines that the Preamble (Preamble) is not responded by the base station in the RAR window, the UE may determine a waiting time according to the value indicated by the BI, and then re-transmits a PRACH (Physical Random Access Channel), which can effectively prevent collision caused by too many UEs transmitting the Preamble at the same time. In the NTN system, because the transmission delay between the base station and the UE is large, when the BI indicates that the UE arrives from the base station, the UE has already waited for one RTT (Round Trip Time). In addition, in the conventional terrestrial network, no matter after the Msg2 step or after the Msg4 step, when the UE determines that the random access fails, the UE uses the BI received in the Msg2 as a reference for backoff, and in the NTN system, when the UE determines that the random access fails after receiving the Msg4, the UE has already waited for one RTT, and the above problems need to be considered again.

In view of the above, the present application provides a solution. It should be noted that, in the above description of the problem, the NTN scenario is only an example of an application scenario of the solution provided in the present application; the method and the device are also applicable to the scenes such as the ground network, and achieve the technical effect similar to the NTN scene. Similarly, the present application is also applicable to scenarios where there is a network of UAVs (Unmanned Aerial vehicles), or internet of things devices, for example, to achieve technical effects in NTN-like scenarios. Furthermore, employing a unified solution for different scenarios (including but not limited to NTN scenarios and ground network scenarios) also helps to reduce hardware complexity and cost.

It should be noted that, without conflict, the embodiments and features in the embodiments in the first node of the present application may be applied to the second node and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

The application discloses a method in a first node used for wireless communication, comprising:

receiving first information;

transmitting a first signal;

receiving a second signal;

transmitting the target signal in a second time window;

wherein a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time.

As an example, the above method has the benefits of: for the NTN system, the transmission delay caused by the longer distance between the base station and the first node should not affect the indication of the BI, that is, for the first node, there still exists more opportunities to retransmit the PRACH within the period from the completion of the PRACH transmission to the reception of the BI, and further, if the first node does not retransmit the PRACH within the period, that is, the first node performs the backoff; in this case, the back-off Time determined from the received BI value needs to take into account the natural delay due to RTT (Round Trip Time); in the above method, the first information is used to determine the first length of time, i.e. to enable taking into account the effect of RTT in the BI.

As an example, another benefit of the above method is: in an existing TN (Terrestrial network) system, after receiving Msg2 and Msg4, a first node can determine whether random access fails to determine whether to reinitiate random access after rollback according to an indication of a BI, and the adopted BI is still the BI indicated in Msg 2; then, in the NTN system, when Msg2 is received, the first node has only 1 RTT away from the PRACH transmission, and when Msg4 is received, the first node has already two RTTs; further, the interpretation of the BI needs to be distinguished for judging the random access failure after receiving the Msg2 and judging the random access failure after receiving the Msg 4; in the above method, whether the second signal carries the first identifier is used to determine the first time length, i.e. to solve the problem.

According to an aspect of the application, when the second signal does not carry the first identifier, the reference time is equal to an end time of the first time window.

As an embodiment, the essence of the above method is: and when the first node judges that the random access fails after receiving the Msg2, the first node calculates the back-off time from the end time of the first time window.

According to an aspect of the application, when the second signal carries the first identity, the method in the first node comprises:

transmitting a third signal;

receiving a fourth signal;

wherein the cut-off instant of the third signal is used to determine a third time window; the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation coding mode adopted by the third signal; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

As an embodiment, the essence of the above method is: and when the first node judges that the random access fails after receiving the Msg4, the first node calculates the back-off time from the end time of the third time window.

According to an aspect of the application, the first indication is used to indicate a target length of time, the first information comprises a first parameter, the first parameter is used to determine a first offset length of time, whether the second signal carries the first identity is used to determine a first coefficient; the target length of time, the first offset length of time and the first coefficient are used together to determine a second length of time; the first time length is equal to T1 ms, the second time length is equal to T2 ms, the T1 is a non-negative integer, the T1 is a non-negative integer randomly selected by the first node from 0 to T2 in a uniform distribution; the T2 is not less than the T1.

According to one aspect of the application, the first length of time is equal to the target length of time minus a product of the first coefficient and the first offset length of time.

As an example, the above method has the benefits of: the backoff time actually used by the first node, that is, the first time length, is equal to the target time length indicated by the BI minus a positive integer multiple of RTT time.

According to an aspect of the present application, when the target time length is greater than a product of the first coefficient and a first offset time length, the first time length is equal to a difference obtained by subtracting the product of the first coefficient and the first offset time length from the target time length; or, when the target time length is not greater than the product of the first coefficient and the first offset time length, the first time length is equal to 0.

As an example, the above method has the benefits of: the backoff time actually adopted by the first node, i.e. the first time length, is equal to the target time length indicated by BI minus a larger value between a positive integer multiple of RTT time and 0.

According to an aspect of the application, when the second signal does not carry the first identity, the first coefficient is equal to K1; or, when the second signal carries the first identity, the first coefficient is equal to twice K1; the K1 is a positive integer.

As an example, the above method has the benefits of: the first coefficient is used to distinguish how many RTTs to subtract from the value indicated by BI; when the first node judges that the random access fails after receiving the Msg2, the upper limit of the backoff time is the subtraction of one RTT from the BI indicated value; and when the first node judges that the random access fails after receiving the Msg4, the backoff time upper limit is the BI indication value minus 2 RTTs.

According to an aspect of the application, the first parameter is used to determine a first group of lengths of time from the M1 candidate groups of lengths of time, the first group of lengths of time comprising a first set of lengths of time and a second set of lengths of time; the set of target lengths of time is one of the set of first lengths of time and the set of second lengths of time; whether the second signal carries the first identity is used to determine the set of target time lengths from the set of first time lengths and the set of second time lengths; the first indication is used to indicate the first length of time from the set of target lengths of time.

As an example, the above method has the benefits of: the M1 candidate time length groups respectively correspond to M1 different RTTs, and further correspond to M1 different satellite types or M1 different satellite altitudes; the essence of this approach is to configure different tables of BI parameter values for different satellite types, thereby indicating BI values more flexibly and efficiently.

According to an aspect of the application, the first parameter relates to a height of the sender of the second signal, or the first parameter relates to a type of the sender of the second signal, or the first parameter relates to a distance of the first node to the sender of the second signal.

As an example, the above method has the benefits of: interpretation of the BI is related to the RTT.

According to one aspect of the application, comprising:

receiving a fifth signal;

wherein the fifth signal is used to determine a first time unit, the first signal is transmitted in a second time unit, and a length of a time interval between a start time of the first time unit and a start time of the second time unit is related to the first parameter; the starting time of the second time unit is earlier than the starting time of the first time unit.

As an embodiment, the above method is characterized in that: and the first node determines downlink timing according to the fifth signal, and sends the first signal after the timing advance of the pre-compensation according to the downlink timing and the positioning capability of the first node.

According to one aspect of the application, comprising:

receiving a sixth signal;

wherein the sixth signal is used to determine a first target time window in which the first signal is received by a sender of the sixth signal.

As an example, the above method has the benefits of: in this application, the second node informs the first node of a receiving timeslot (Slot) of the first signal through the sixth signal, and thus when the first node performs TA pre-compensation, the second node can determine a sending timeslot for actually sending the first signal.

The application discloses a method in a second node used for wireless communication, comprising:

sending first information;

receiving a first signal;

transmitting a second signal;

receiving a target signal;

wherein a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; a sender of the first signal determines a first time window through a time domain transmission cut-off time of the first signal; a sender of the first signal receives the second signal in the first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of a second time window and the reference time; the sender of the first signal sends the target signal in the second time window.

According to an aspect of the application, when the second signal carries the first identity, the method in the second node comprises:

receiving a third signal;

transmitting a fourth signal;

the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation and coding mode adopted by the third signal; the sender of the third signal determines a third time window according to the sending cutoff time of the third signal; a sender of the third signal receives the fourth signal in the third time window; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

According to one aspect of the application, comprising:

transmitting a fifth signal;

According to one aspect of the application, comprising:

transmitting a sixth signal;

wherein the sixth signal is used to determine a first target time window in which the second node receives the first signal.

The application discloses a first node used for wireless communication, characterized by comprising:

receiving first information;

transmitting a first signal;

receiving a second signal;

transmitting the target signal in a second time window;

The application discloses a second node used for wireless communication, characterized by comprising:

sending first information;

receiving a first signal;

transmitting a second signal;

receiving a target signal;

As an example, compared with the conventional scheme, the method has the following advantages:

for NTN systems, the solution in the present application considers RTT in the choice of backoff time, on the premise of continuing to use the existing BI architecture, to optimize interpretation of BI;

meanwhile, for two situations that the UE judges the random access failure after receiving the Msg2 and the UE judges the random access failure after receiving the Msg4, different BI reading modes are respectively adopted to optimize the selection of the backoff time;

designing M1 candidate sets of time lengths, the M1 candidate sets of time lengths corresponding to M1 different RTTs, respectively, and further corresponding to M1 different satellite types or satellite altitudes; the essence of this approach is to configure different tables of BI parameter values for different satellite types, thereby indicating BI values more flexibly and efficiently.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof with reference to the accompanying drawings in which:

FIG. 1 illustrates a process flow diagram of a first node according to one embodiment of the present application;

FIG. 2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

figure 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

FIG. 5 shows a flow diagram of a first signal according to an embodiment of the present application;

FIG. 6 shows a flow diagram of a third signal according to an embodiment of the present application;

FIG. 7 shows a schematic diagram of a first time window according to an embodiment of the present application;

FIG. 8 shows a schematic diagram of a reference moment and a second time window according to an embodiment of the present application;

FIG. 9 shows a schematic diagram of another reference moment and a second time window according to an embodiment of the present application;

FIG. 10 shows a schematic diagram of a first set of time lengths according to an embodiment of the present application;

FIG. 11 shows a schematic diagram of transmission delays according to an embodiment of the present application;

FIG. 12 shows a schematic diagram of a first time unit and a second time unit according to an embodiment of the present application;

FIG. 13 shows a block diagram of a structure used in a first node according to an embodiment of the present application;

fig. 14 shows a block diagram of a structure used in a second node according to an embodiment of the present application.

Detailed Description

The technical solutions of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that the embodiments and features of the embodiments of the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a processing flow diagram of a first node, as shown in fig. 1. In 100 shown in fig. 1, each block represents a step. In embodiment 1, a first node in the present application receives first information in step 101; transmitting a first signal in step 102; receiving a second signal in step 103; in step 104, the target signal is transmitted in a second time window.

In embodiment 1, a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time.

For one embodiment, the first node receives the second signal in the first time window.

As one embodiment, the first node detects the second signal in the first time window.

As one embodiment, the first length of time is equal to T1 milliseconds, the T1 being a real number no less than 0.

As one embodiment, the first length of time is equal to T1 milliseconds, and T1 is an integer no less than 0.

As an embodiment, the Signaling carrying the first information is Higher Layer Signaling (high Layer Signaling).

As an embodiment, the signaling carrying the first information is RRC (Radio Resource Control) signaling.

As an embodiment, the signaling carrying the first information is broadcast signaling.

As an embodiment, carrying the first Information is an SIB (System Information Block).

As one embodiment, the first information is cell-specific.

As an embodiment, the first information comprises a first information unit, which is used to determine the first length of time.

As a sub-embodiment of this embodiment, the first information comprises a second information unit, the second information unit being used to indicate whether the first information unit is used to determine the first length of time.

As a sub-embodiment of this embodiment, the first information element is used to determine K_offset。

As an embodiment, the first information is used to indicate whether the second signal carries the first identity or not is used to determine the first length of time.

As a sub-embodiment of this embodiment, when the first information indicates whether the second signal carries the first identifier is used for determining the first length of time; the second signal does not carry the first identifier, and the first time length is equal to a first candidate time length; or, the second signal carries the first identifier, and the first time length is equal to a second candidate time length; the first candidate length of time is not equal to the second candidate length of time.

As a sub-embodiment of this embodiment, when the first information indicates whether the second signal carries the first identifier is not used for determining the first time length, the first time length is independent of whether the second signal carries the first identifier.

As one embodiment, the first information is used to indicate whether both the first information and the first indication are used to determine the first length of time.

As a sub-embodiment of this embodiment, the first information is used to indicate that both the first information and the first indication are used to determine the first length of time.

As a sub-embodiment of this embodiment, the first information is used to indicate that only the first indication of the first information and the first indication is used to determine the first length of time.

As one embodiment, the physical layer channel carrying the first signal is a PRACH.

As one embodiment, the first signal is a Preamble.

As an embodiment, the physical layer channel carrying the target signal is a PRACH.

As an embodiment, it is Preamble that generates the target signal.

As an embodiment, an air interface resource occupied by the first signal is used to determine the second identifier.

As a sub-embodiment of this embodiment, the air interface resource occupied by the first signal includes a time domain resource occupied by the first signal.

As a sub-embodiment of this embodiment, the air interface resource occupied by the first signal includes a frequency domain resource occupied by the first signal.

As a sub-embodiment of this embodiment, the air interface resource occupied by the first signal includes a code domain resource occupied by the first signal.

As a sub-embodiment of this embodiment, the air interface resource occupied by the first signal includes res (resource elements) occupied by the first signal.

As a sub-embodiment of this embodiment, a time-frequency position of an air interface resource occupied by the first signal is used to determine the second identifier.

As a sub-embodiment of this embodiment, a time domain position of an air interface resource occupied by the first signal is used to determine the second identifier.

As a sub-embodiment of this embodiment, a frequency domain position of an air interface resource occupied by the first signal is used to determine the second identifier.

As a sub-embodiment of this embodiment, the sequence taken by the first signal is used to determine the second identity.

As an embodiment, the first time window is a RAR window.

As an embodiment, the first identifier is a Preamble Index (Preamble Index).

As an embodiment, the first identifier is a Random Access Preamble ID (Random Access Preamble identifier).

As an embodiment, the second signal is a RAR.

As an example, the second signal is Msg 2.

As an embodiment, the second signal is used for feeding back the first signal.

As an embodiment, the above phrase that the second signal carries the meaning of the second identifier includes: the second signal includes a first sub-signal and a second sub-signal, a Physical layer Channel carrying the first sub-signal is a PDCCH (Physical Downlink Control Channel), a Physical layer Channel carrying the second sub-signal is a PDSCH (Physical Downlink Shared Channel), and a CRC (Cyclic Redundancy Check) carried by the first sub-signal is scrambled by the second identifier.

As a sub-embodiment of this embodiment, the second sub-signal carries the first indication.

As a sub-embodiment of this embodiment, the PDSCH included in the second sub-signal includes a MAC (Medium Access Control) sub-header, and the MAC sub-header includes the first indication.

As a sub-embodiment of this embodiment, the PDSCH included in the second sub-signal includes a MAC sub-pdu, and the MAC sub-pdu includes the first indication.

As an embodiment, the second Identifier is RA-RNTI (Random Access Radio Network Temporary Identifier).

As one embodiment, the first signal is used to initiate random access.

As one embodiment, the second signal is feedback for the first signal.

As an embodiment, the target signal is used to re-initiate random access.

As an embodiment, whether the first information and the second signal carry the first identifier are both used to determine whether an end time of the first time window is equal to a reference time.

As a sub-embodiment of this embodiment, the meaning of the above phrase includes: when the first information is used to indicate whether the second signal carries the first identity is used to determine the first length of time, whether the second signal carries the first identity is also used to determine whether an end time of the first time window is equal to a reference time.

As an embodiment, the reference time is a time at which the first node determines that a random access initiated by the first signal fails.

As an embodiment, the reference time is used by the first node to determine a time to re-initiate random access.

As an embodiment, the first time length is a back-off time actually adopted by the first node, and the first node re-initiates random access after the countdown for the back-off time is ended.

As one embodiment, the first signal is a wireless signal.

As one embodiment, the first signal is a baseband signal.

As one embodiment, the second signal is a wireless signal.

As one embodiment, the second signal is a baseband signal.

For one embodiment, the first time Window is a random access response Window (RAR Window).

As an embodiment, the first time window includes a positive integer number of consecutive time slots in the time domain.

As an embodiment, the second time window includes a positive integer number of consecutive time slots in the time domain.

As an embodiment, the duration of the second time window in the time domain is equal to a positive integer number of milliseconds.

As an embodiment, the first indication is BI (Backoff Indicator).

As one embodiment, the first node has location capability.

As one embodiment, the first node has pre-compensation capability.

As an embodiment, the first node in the present application is in an RRC _ IDLE state from when the first signal is transmitted to when the third signal is transmitted.

As an embodiment, the first node in this application is in an uplink out-of-step state from when the first signal is transmitted to when the third signal is transmitted.

As an embodiment, the first signal includes a Preamble in a four-step random access.

As an embodiment, the first signal comprises Msg1 (message 1) in a four-step RACH.

As an embodiment, the first time window is configured by ra-ResponseWindow IE (Information Elements).

As an example, the RTT in this application is twice the transmission delay from the second node to the ground in this application.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture, as shown in fig. 2.

Fig. 2 illustrates a diagram of a network architecture 200 for 5G NR, LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution-enhanced) systems. The 5G NR or LTE network architecture 200 may be referred to as EPS (Evolved Packet System) 200 or some other suitable terminology. The EPS 200 may include one or more UEs (User Equipment) 201, NG-RANs (next generation radio access networks) 202, EPCs (Evolved Packet cores)/5G-CNs (5G-Core networks) 210, HSS (Home Subscriber Server) 220, and internet services 230. The EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the EPS provides packet-switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR node b (gNB)203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmitting receiving node), or some other suitable terminology. The gNB203 provides an access point for the UE201 to the EPC/5G-CN 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. Those skilled in the art may also refer to UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The gNB203 connects to the EPC/5G-CN 210 through the S1/NG interface. The EPC/5G-CN 210 includes MME (Mobility Management Entity)/AMF (Authentication Management Domain)/UPF (User Plane Function) 211, other MMEs/AMF/UPF 214, S-GW (Service Gateway) 212, and P-GW (Packet data Network Gateway) 213. MME/AMF/UPF211 is a control node that handles signaling between UE201 and EPC/5G-CN 210. In general, the MME/AMF/UPF211 provides bearer and connection management. All user IP (Internet protocol) packets are transmitted through S-GW212, and S-GW212 itself is connected to P-GW 213. The P-GW213 provides UE IP address allocation as well as other functions. The P-GW213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a packet-switched streaming service.

As an embodiment, the UE201 corresponds to the first node in this application.

As an embodiment, the gNB203 corresponds to the second node in this application.

As an embodiment, the air interface between the UE201 and the gNB203 is a Uu interface.

As an embodiment, the radio link between the UE201 and the gNB203 is a cellular link.

As an example, the wireless Link between the gNB203 and the ground station is a Feeder Link.

As an embodiment, the first node in this application is a terminal within the coverage of the gNB 203.

As an embodiment, the UE201 supports transmission in a non-terrestrial network (NTN).

As an embodiment, the UE201 supports transmission in a large delay network.

As one embodiment, the gNB203 supports transmissions over a non-terrestrial network (NTN).

As an embodiment, the gNB203 supports transmission in a large delay network.

As an embodiment, the first node has GPS (Global Positioning System) capability.

As an example, the first node has GNSS (Global Navigation Satellite System) capability.

As an embodiment, the first node has BDS (BeiDou Navigation Satellite System) capability.

As an example, the first node has GALILEO (GALILEO Satellite Navigation System) capability.

As one embodiment, the first node has a Capability of Pre-Compensation (Pre-Compensation).

For one embodiment, the first node has uplink synchronization pre-compensation capability.

For one embodiment, the first node has the capability of estimating an uplink TA by itself.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of radio protocol architecture for the user plane 350 and the control plane 300, fig. 3 showing the radio protocol architecture for the control plane 300 between a first communication node device (UE, RSU in gbb or V2X) and a second communication node device (gbb, RSU in UE or V2X) in three layers: layer 1, layer 2 and layer 3. Layer 1(L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2(L2 layer) 305 is above PHY301 and is responsible for the link between the first communication node device and the second communication node device through PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second communication node device. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by ciphering data packets and provides handoff support between second communication node devices to the first communication node device. The RLC sublayer 303 provides segmentation and reassembly of upper layer packets, retransmission of lost packets, and reordering of packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in one cell between the first communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (layer L3) in the Control plane 300 is responsible for obtaining Radio resources (i.e. Radio bearers) and configuring the lower layers using RRC signaling between the second communication node device and the first communication node device. The radio protocol architecture of the user plane 350 comprises layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 for the first and second communication node devices being substantially the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355 and the MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support diversity of services. Although not shown, the first communication node device may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

As an example, the wireless protocol architecture in fig. 3 is applicable to the first node in this application.

As an example, the radio protocol architecture in fig. 3 is applicable to the second node in this application.

As an embodiment, the PDCP304 of the second communication node device is used to generate a schedule for the first communication node device.

As an embodiment, the PDCP354 of the second communication node device is used to generate a schedule for the first communication node device.

For one embodiment, the first information is generated in the MAC352 or the MAC 302.

As an embodiment, the first information is generated at the RRC 306.

For one embodiment, the first signal is generated from the PHY301 or the PHY 351.

For one embodiment, the first signal is generated at the MAC352 or the MAC 302.

For one embodiment, the second signal is generated from the PHY301 or the PHY 351.

For one embodiment, the second signal is generated at the MAC352 or the MAC 302.

For one embodiment, the target signal is generated from the PHY301 or the PHY 351.

For one embodiment, the target signal is generated at the MAC352 or the MAC 302.

For one embodiment, the third signal is generated from the PHY301 or the PHY 351.

For one embodiment, the third signal is generated at the MAC352 or the MAC 302.

For one embodiment, the fourth signal is generated from the PHY301 or the PHY 351.

For one embodiment, the fourth signal is generated at the MAC352 or the MAC 302.

For one embodiment, the fifth signal is generated from the PHY301 or the PHY 351.

For one embodiment, the fifth signal is generated at the MAC352 or the MAC 302.

As an embodiment, the fifth signal is generated at the RRC 306.

For one embodiment, the sixth signal is generated from the PHY301 or the PHY 351.

For one embodiment, the sixth signal is generated at the MAC352 or the MAC 302.

As an embodiment, the sixth signal is generated at the RRC 306.

As an embodiment, the second node in this application sends a positioning signal, and the first node in this application receives a positioning signal.

As a sub-embodiment of this embodiment, it is SMLC (Serving Mobile Location center) that triggers the sending of the positioning signal.

As a sub-embodiment of this embodiment, it is E-SMLC (Evolved Serving Mobile Location center) that triggers the sending of the positioning signal.

As a sub-embodiment of this embodiment, it is SLP (SUPL Location Platform) that triggers the sending of the Location signal; wherein SUPL is Secure User Plane Location.

As a sub-embodiment of this embodiment, it is LMU (Location Measurement Unit) that triggers the sending of the Location signal.

As a sub-embodiment of this embodiment, the operation triggering the sending of the positioning signal is from the core network.

Example 4

Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

The first communications device 450 includes a controller/processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter/receiver 454, and an antenna 452.

The second communication device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of layer L2. In transmissions from the second communications device 410 to the first communications device 450, the controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communications device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets, and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal constellation based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate the physical channels carrying the time-domain multicarrier symbol streams. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

In a transmission from the second communications apparatus 410 to the first communications apparatus 450, each receiver 454 receives a signal through its respective antenna 452 at the first communications apparatus 450. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. Receive processor 456 converts the baseband multicarrier symbol stream after the receive analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered at a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communications device 410 on the physical channel. The upper layer data and control signals are then provided to a controller/processor 459. The controller/processor 459 implements the functionality of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In transmissions from the second communications device 410 to the second communications device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In a transmission from the first communications device 450 to the second communications device 410, a data source 467 is used at the first communications device 450 to provide upper layer data packets to a controller/processor 459. Data source 467 represents all protocol layers above the L2 layer. Similar to the send function at the second communications apparatus 410 described in the transmission from the second communications apparatus 410 to the first communications apparatus 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to said second communications device 410. A transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding by a multi-antenna transmit processor 457 including codebook-based precoding and non-codebook based precoding, and beamforming, and the transmit processor 468 then modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to different antennas 452 via a transmitter 454 after analog precoding/beamforming in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and provides the radio frequency symbol stream to the antenna 452.

In a transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the receiving functionality at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. Controller/processor 475 implements the L2 layer functions. The controller/processor 475 can be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In transmission from the first communications device 450 to the second communications device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 450. Upper layer data packets from the controller/processor 475 may be provided to a core network.

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, for use with the at least one processor, the first communication device 450 apparatus at least: receiving the first information, transmitting the first signal, receiving the second signal, and transmitting the target signal in a second time window; a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time.

As an embodiment, the first communication device 450 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: receiving the first information, transmitting the first signal, receiving the second signal, and transmitting the target signal in a second time window; a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: transmitting first information, receiving a first signal, transmitting a second signal, and receiving a target signal; a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; a sender of the first signal determines a first time window through a time domain transmission cut-off time of the first signal; a sender of the first signal receives the second signal in the first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of a second time window and the reference time; the sender of the first signal sends the target signal in the second time window.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting first information, receiving a first signal, transmitting a second signal, and receiving a target signal; a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; a sender of the first signal determines a first time window through a time domain transmission cut-off time of the first signal; a sender of the first signal receives the second signal in the first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of a second time window and the reference time; the sender of the first signal sends the target signal in the second time window.

As an embodiment, the first communication device 450 corresponds to a first node in the present application.

As an embodiment, the second communication device 410 corresponds to a second node in the present application.

For one embodiment, the first communication device 450 is a UE.

For one embodiment, the first communication device 450 is a ground terminal.

For one embodiment, the first communication device 450 is a surface device.

For one embodiment, the first communication device 450 is a near-earth terminal.

For one embodiment, the first communication device 450 is an aircraft.

As an example, the first communication device 450 is a surface vehicle.

For one embodiment, the second communication device 410 is a base station.

For one embodiment, the second communication device 410 is a non-terrestrial base station.

As an example, the second communication device 410 is a GEO (Geostationary Earth orbit) satellite.

As an example, the second communication device 410 is a MEO (Medium Earth orbit) satellite.

As an example, the second communication device 410 is a LEO (Low Earth Orbit) satellite.

As an example, the second communication device 410 is a HEO (high elliptic orbit) satellite.

As an example, the second communication device 410 is an Airborne Platform.

As an example, the second communication device 410 is a HAPS (High Altitude Platform Station)

For one embodiment, at least the first four of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 are configured to receive first information; at least the first four of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 are used to send the first information.

As one implementation, at least the first four of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 are used to send a first signal; at least the first four of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller/processor 475 are used to receive a first signal.

For one embodiment, at least the first four of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 are configured to receive a second signal; at least the first four of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 are used to send a second signal.

As one implementation, at least the first four of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 are configured to transmit a target signal in a second time window; at least the first four of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller/processor 475 are used to receive a target signal.

For one embodiment, at least the first four of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 are configured to receive a fifth signal; at least the first four of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 are used to send a fifth signal.

For one embodiment, at least the first four of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459 are configured to receive a sixth signal; at least the first four of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475 are used to send a sixth signal.

Example 5

Embodiment 5 illustrates a flow chart of a first signal, as shown in fig. 5. In FIG. 5, a first node U1 communicates with a second node N2 via a wireless link. Without conflict, the embodiment, sub-embodiment and sub-embodiment in embodiment 5 can be used in embodiment 6.

For theFirst node U1Receiving a fifth signal in step S10; receiving a sixth signal in step S11; receiving the first information in step S12; transmitting a first signal in step S13; receiving a second signal in step S14; in step S15, the target signal is transmitted in a second time window.

For theSecond node N2A fifth signal is transmitted in step S20; transmitting a sixth signal in step S21; transmitting the first information in step S22; receiving a first signal in step S23; transmitting a second signal in step S24; the target signal is received in step S25.

In embodiment 5, a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; the second signal not carrying the first identity, the first information and the first indication is used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; the second signal not carrying the first identifier is used to determine that the end time of the first time window is equal to a reference time, and the first time length is used to determine a time interval length between the start time of the second time window and the reference time.

As an embodiment, the above phrase that the second signal does not carry the first identifier means that: the second signal carries a RAPID other than the first identity.

As an embodiment, the above phrase that the second signal does not carry the first identifier means that: the second signal does not carry any RAPID.

As an embodiment, the above phrase that the second signal does not carry the first identifier means that: and the second signal carries a Preamble Index except the first identifier.

As an embodiment, the above phrase that the second signal does not carry the first identifier means that: the second signal does not carry any Preamble Index.

As an embodiment, the above phrase that the second signal does not carry the first identifier means that: the first node U1 is unable to detect the first identification in the second signal.

As an embodiment, when the second signal does not carry the first identifier, and the reference time is equal to an end time of the first time window, the first node U1 considers that the random access initiated by the first signal at the reference time fails.

As an embodiment, the first indication is used to indicate a target length of time, the first information includes a first parameter used to determine a first offset length of time, whether the second signal carries the first identity is used to determine a first coefficient; the target length of time, the first offset length of time and the first coefficient are used together to determine a second length of time; the first time length is equal to T1 milliseconds, the second time length is equal to T2 milliseconds, the T1 is a non-negative integer, and the T1 is a non-negative integer randomly selected by the first node U1 from 0 to T2 according to a uniform distribution; the T2 is not less than the T1.

As a sub-embodiment of this embodiment, the first offset time length is equal to 2 times the transmission delay of the second node N2 to the ground.

As a sub-embodiment of this embodiment, the target time length is equal to TX milliseconds, the first coefficient is a positive integer, and the first offset time length is equal to TY milliseconds.

As an additional embodiment of this sub-embodiment, the TX is a positive integer.

As an additional example of this sub-embodiment, the TY is a positive integer.

As an adjunct embodiment to this sub-embodiment, the TX is a positive real number.

As an additional example of this sub-embodiment, the TY is a positive real number.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, which is equal to 2 times the quotient of L1 and 300000, and L1 is the distance from the second node N2 to the ground.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, the TY is equal to a quotient of L1 and 300000, and L1 is the distance from the second node N2 to the ground.

As an additional embodiment of the two sub-embodiments, the unit of L1 is meter.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, the TY is equal to 2 times the quotient of L2 and 300000, the L2 is the distance between the second node N2 and the first node U1, and the first node U1 estimates the L2 according to the first parameter and the positioning capability of the first node U1.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, the TY is equal to a quotient of L2 and 300000, the L2 is a distance between the second node N2 and the first node U1, and the first node U1 estimates the L2 according to the first parameter and the positioning capability of the first node U1.

As an additional embodiment of the two sub-embodiments, the unit of L2 is meter.

As a sub-embodiment of this embodiment, the first parameter is used to indicate the first offset time length.

As a sub-embodiment of this embodiment, the first parameter is used to determine the first offset time length.

As an embodiment, the first time length is equal to the target time length minus a product of the first coefficient and a first offset time length.

As an embodiment, when the target time length is greater than a product of the first coefficient and a first offset time length, the first time length is equal to a difference obtained by subtracting the product of the first coefficient and the first offset time length from the target time length; or, when the target time length is not greater than a product of the first coefficient and a first offset time length, the first time length is equal to 0.

As an embodiment, when the second signal does not carry the first flag, the first coefficient is equal to K1, and K1 is a positive integer.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, L1 is the distance from the second node N2 to the ground, and when TY is equal to 2 times the quotient of L1 and 300000, the K1 is equal to 1.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, the L1 is the distance from the second node N2 to the ground, and the K1 is equal to 2 when the TY is equal to the quotient of L1 and 300000.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, L2 is the distance between the second node N2 and the first node U1, the first node U1 estimates the L2 based on the first parameter and the location capability of the first node U1, and the K1 is equal to 1 when the TY is equal to 2 times the quotient of L2 and 300000.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, L2 is the distance between the second node N2 and the first node U1, the first node U1 estimates the L2 according to the first parameter and the location capability of the first node U1, and when the TY is equal to the quotient of L2 and 300000, the K1 is equal to 2.

As an example, the distance from the second node N2 to the ground in this application refers to the distance from the second node N2 to the near point.

As an example, the distance from the second node N2 to the ground in this application refers to the distance from the second node N2 to the horizontal plane.

As an example, the distance from the second node N2 to the ground in this application refers to the height of the second node N2.

As an embodiment, the first parameter is used to determine a first group of lengths of time from the M1 candidate groups of lengths of time, the first group of lengths of time comprising a first set of lengths of time and a second set of lengths of time; the set of target lengths of time is one of the set of first lengths of time and the set of second lengths of time; whether the second signal carries the first identity is used to determine the set of target time lengths from the set of first time lengths and the set of second time lengths; the first indication is used to indicate the first length of time from the set of target lengths of time.

As a sub-embodiment of this embodiment, the set of target time lengths comprises Q1 first class time lengths, the first indication being used to indicate the first time length from the Q1 first class time lengths.

As a sub-embodiment of this embodiment, when the second signal does not carry the first identifier, the target set of time lengths is the first set of lengths; or when the second signal carries the first identifier, the target time length set is the second length set; the first set of lengths of time and the second set of lengths of time are different.

As a sub-embodiment of this embodiment, the first indication includes 4 bits, the Q1 is equal to 16 in this application, and the 4 bits included in the first indication are used to indicate the first time length from the 16 first-class time lengths.

As a sub-embodiment of this embodiment, the type of the second node N2 in this application is a target type, the target type is one of M1 candidate types, the M1 candidate types respectively correspond to the M1 candidate time length groups, and the first parameter is used to determine the first time length group corresponding to the target type from the M1 candidate time length groups.

As an additional example of this sub-embodiment, the M1 candidate types include one or more of GEO satellites, MEO satellites, LEO satellites, HEO satellites, Airborne platforms, or HAPS.

As a sub-embodiment of this embodiment, the height of the second node N2 in this application belongs to a first height interval, the first height interval is one of M1 candidate height intervals, the M1 candidate height intervals respectively correspond to the M1 candidate time length groups, and the first parameter is used to determine the first time length group corresponding to the first height interval from the M1 candidate time length groups.

As a sub-embodiment of this embodiment, the distance between the second node N2 and the first node U1 in this application belongs to a first distance interval, the first distance interval is one of M1 candidate distance intervals, the M1 candidate distance intervals respectively correspond to the M1 candidate time length groups, and the first parameter is used to determine the first time length group corresponding to the first distance interval from the M1 candidate time length groups.

As a sub-embodiment of this embodiment, any one of the M1 candidate time length groups includes two candidate time length sets, the second signal carries the first identifier corresponding to one of the two candidate time length sets, and the second signal does not carry the first identifier corresponding to the other of the two candidate time length sets.

As an embodiment, the first parameter relates to the altitude of the second node N2, or the first parameter relates to the type of the second node N2, or the first parameter relates to the distance of the first node U1 from the second node N2.

As an example, the first parameter is used to determine the altitude of the second node N2.

As an embodiment, the first parameter is used to determine the type of the second node N2.

For one embodiment, the first parameter is used to determine the distance of the first node U1 from the second node N2.

As an embodiment, the first parameter is used to determine the location information of the second node N2.

As an embodiment, the first parameter is used to indicate location information of the second node N2.

As a sub-embodiment of this embodiment, the position information of the second node N2 includes Ephemeris information (Ephemeris) of the second node N2.

As a sub-embodiment of this embodiment, the position information of the second node N2 includes the operation speed and direction information of the second node N2.

As a sub-embodiment of this embodiment, the location information of the second node N2 comprises spatial location information of the second node N2 at the time of receiving the first signal.

As an embodiment, the location information of the second node N2 is used to determine the first offset time length.

As an example, the first parameter is used to indicate the altitude of the second node N2.

As an embodiment, the first parameter is used to indicate the type of the second node N2.

As an embodiment, the first parameter is used to indicate a distance of the first node U1 to the second node N2.

For one embodiment, the height of the second node N2 is used to determine the first offset time length.

For one embodiment, the type of the second node N2 is used to determine the first offset time length.

For one embodiment, the first parameter is used to determine a distance of the first node U1 to the second node N2 for determining the first offset length of time.

As an embodiment, the fifth signal is used to determine a first time unit, the first signal is transmitted in a second time unit, a length of a time interval between a start time of the first time unit and a start time of the second time unit is related to the first parameter; the starting time of the second time unit is earlier than the starting time of the first time unit.

As a sub-embodiment of this embodiment, the first time unit is a Slot (Slot).

As a sub-embodiment of this embodiment, the first time unit is a Subframe (Subframe).

As a sub-embodiment of this embodiment, the second time unit is a time Slot (Slot).

As a sub-embodiment of this embodiment, the second time unit is a Subframe (Subframe).

As an embodiment, the first node U1 has GNSS (Global Navigation Satellite System) capability.

As an example, the first node U1 is provided with an upstream synchronization Pre-Compensation (Pre-Compensation) Capability (Capability).

As an embodiment, the first node U1 has the capability of estimating the uplink TA by itself and performing uplink synchronization pre-compensation.

As one embodiment, the fifth Signal includes a PSS (Primary Synchronization Signal).

As an embodiment, the fifth Signal includes SSS (Secondary Synchronization Signal).

For one embodiment, the fifth signal includes an SSB (SS/PBCH Block, synchronization signal/physical broadcast signal Block).

As an embodiment, the fifth signal is used to determine downlink timing.

As an embodiment, the fifth signal is used to determine a first time unit, which is a multicarrier symbol in a time slot.

As an embodiment, the fifth signal is used to determine a first time unit, which is a plurality of multicarrier symbols in one slot.

As an example, the above sentence wherein the fifth signal is used to determine the meaning of the first time unit comprises: the fifth signal is used to indicate a position of the first time unit in the time domain.

As an example, the above sentence wherein the fifth signal is used to determine the meaning of the first time unit comprises: and the first node U1 determines downlink timing according to the fifth signal, and determines the time slot occupied by the first time unit according to the downlink timing.

As a sub-embodiment of this embodiment, the determining the downlink timing includes determining a downlink SFN (System Frame Number).

As a sub-embodiment of this embodiment, the determining the downlink timing includes determining a downlink slot boundary.

As a sub-embodiment of this embodiment, the determining the downlink timing includes determining a downlink OFDM (Orthogonal Frequency Division Multiplexing) symbol boundary.

As an example, the above sentence wherein the fifth signal is used to determine the meaning of the first time unit comprises: the fifth signal is used to determine a synchronization timing of the first time unit.

As a sub-embodiment of this embodiment, the synchronization timing of the first time unit includes a start time of the first time unit and an end time of the first time unit.

As a sub-embodiment of this embodiment, the synchronization timing of the first time unit includes a start time of each slot in the first time unit and an end time of each slot in the first time unit.

As a sub-embodiment of this embodiment, the synchronization timing of the first time unit includes a start time of each multicarrier symbol in the first time unit and an end time of each multicarrier symbol in the first time unit.

As one embodiment, the start time of the first time unit is equal to T1 milliseconds, the start time of the second time unit is equal to T2 milliseconds, and the T2 is equal to T1 minus the first offset length of time.

As one embodiment, the start time of the first time unit is equal to T1 milliseconds, the start time of the second time unit is equal to T2 milliseconds, the T2 is equal to the difference of T1 minus a first timing offset value, the first timing offset value is not less than the first offset time length.

As one embodiment, the fifth signal is a wireless signal.

As an embodiment, the fifth signal is a baseband signal.

For one embodiment, the sixth signal is used to determine a first target time window in which the second node N2 receives the first signal.

As one embodiment, the sixth signal is a wireless signal.

As an embodiment, the sixth signal is a baseband signal.

As an embodiment, the sixth signal is used to determine a format adopted by the first signal.

As an embodiment, the sixth signal is used to determine a generation sequence of the first signal.

As an embodiment, the sixth signal is used to determine a first candidate time window and a second candidate time window, a first target time window being one of the first candidate time window and the second candidate time window, the second node N2 receiving the first signal in the first target time window.

As a sub-embodiment of this embodiment, the start time of the first candidate time window is earlier than the start time of the second candidate time window.

As a sub-embodiment of this embodiment, the first node U1 performs Pre-compensation (Pre-compensation), and the first node determines that the first target time window is the first candidate time window.

As a subsidiary embodiment of this sub-embodiment, the sender of said first signal sends said first signal in a second target time window, the time interval between the start of said second target time window and the start of said first candidate time window being equal to the transmission delay between said first node U1 to said second node N2.

As a sub-embodiment of this embodiment, the first node U1 does not perform Pre-compensation (Pre-compensation), and the first node determines that the first target time window is the second candidate time window.

As a subsidiary embodiment of this sub-embodiment, said first node U1 transmits said first signal in a second target time window, the time interval between the start of said second target time window and the start of said second candidate time window being equal to the transmission delay between said first node U1 to said second node N2.

Example 6

Example 6 illustrates a flow chart of a third signal, as shown in fig. 6. In FIG. 6, a first node U3 communicates with a second node N4 via a wireless link. Without conflict, the embodiment, the sub-embodiment, and the subsidiary embodiment in embodiment 6 can be used for embodiment 5.

For theFirst node U3Receiving a fifth signal in step S30; receiving a sixth signal in step S31; receiving the first information in step S32; transmitting a first signal in step S33; receiving a second signal in step S34; transmitting a third signal in step S35; receiving a fourth signal in step S36; in step S37, the target signal is transmitted in a second time window.

For theSecond node N4A fifth signal is transmitted in step S40; transmitting a sixth signal in step S41; transmitting the first information in step S42; receiving a first signal in step S43; transmitting a second signal in step S44; receiving a third signal in step S45; transmitting a fourth signal in step S46; the target signal is received in step S47.

In embodiment 6, a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; the second signal carrying the first identity, the first information and the first indication together is used to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; the second signal carrying the first identifier is used for determining that the end time of the first time window is not equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time; the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation coding mode adopted by the third signal; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

As an example, the third signal is Msg 3.

As an embodiment, the Physical layer signal carrying the third signal is a PUSCH (Physical Uplink Shared Channel).

As an embodiment, the third signal is scrambled by a TC-RNTI (Temporary Cell Radio Network Temporary identity), and the second signal includes the TC-RNTI.

As an embodiment, the third Identifier is a C-RNTI (Cell Radio Network Temporary Identifier) of the first node U3.

As an embodiment, the third identifier is an S-TMSI (Serving-temporal Mobile Subscriber Identity) of the first node U3.

As an embodiment, the third identifier is a random number generated by the first node U3.

As an embodiment, the third signal includes a CCCH (Common Control Channel) SDU (Service Data Unit) including the third identifier.

As an embodiment, the fourth signal is a MAC CE, the MAC CE includes a UE context Resolution Identity, and the UE context Resolution Identity is the fourth identifier.

As an embodiment, the third identifier and the fourth identifier are not the same, and the first node U3 considers that the random access initiated by the first signal fails.

As an embodiment, the third identifier and the fourth identifier are not the same, and the first node U3 considers the conflict Resolution (content Resolution) to be failed.

As an embodiment, the expiration time of the third time window is the time when the ra-ContentionResolutionTimer expires (Expire).

As one embodiment, the third signal is a wireless signal.

As an embodiment, the third signal is a baseband signal.

As one embodiment, the fourth signal is a wireless signal.

As one embodiment, the fourth signal is a baseband signal.

As an embodiment, the first indication is used to indicate a target length of time, the first information includes a first parameter used to determine a first offset length of time, whether the second signal carries the first identity is used to determine a first coefficient; the target length of time, the first offset length of time and the first coefficient are used together to determine a second length of time; the first time length is equal to T1 milliseconds, the second time length is equal to T2 milliseconds, the T1 is a non-negative integer, and the T1 is a non-negative integer randomly selected by the first node U3 from 0 to T2 according to a uniform distribution; the T2 is not less than the T1.

As an example, when the second signal carries the first identity, the first coefficient is equal to twice K1; the K1 is a positive integer.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, L1 is the distance from the second node N4 to the ground, and when TY is equal to 2 times the quotient of L1 and 300000, the K1 is equal to 1.

As a sub-implementation of this embodiment, the first offset time length is equal to TY, the L1 is the distance from the second node N4 to the ground, and the K1 is equal to 2 when the TY is equal to the quotient of L1 and 300000.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, L2 is the distance between the second node N4 and the first node U3, the first node U3 estimates the L2 based on the first parameter and the location capability of the first node U3, and the K1 is equal to 1 when the TY is equal to 2 times the quotient of L2 and 300000.

As a sub-embodiment of this embodiment, the first offset time length is equal to TY, L2 is the distance between the second node N4 and the first node U3, the first node U3 estimates the L2 according to the first parameter and the location capability of the first node U3, and when the TY is equal to the quotient of L2 and 300000, the K1 is equal to 2.

As an embodiment, the first parameter relates to the altitude of the second node N4, or the first parameter relates to the type of the second node N4, or the first parameter relates to the distance of the first node U3 from the second node N4.

For one embodiment, the sixth signal is used to determine a first target time window in which the second node N4 receives the first signal.

Example 7

Example 7 illustrates a schematic diagram of a first time window according to the present application; as shown in fig. 7. In fig. 7, the first node receives the second signal in the first time window; the first time window includes a positive integer number of consecutive time slots, a first time in fig. 7 corresponds to a time when the first node finishes sending the first signal, a second time shown in the figure is a start time of the first time window, and an interval between the first time and the second time is a second offset time length.

As an embodiment, the second offset time length is equal to the first offset time length in this application.

As one embodiment, the unit of the second offset time length is milliseconds.

As one embodiment, the second offset time length is equal to a positive integer number of milliseconds.

As an embodiment, the first information is used to indicate the second offset time length.

As an embodiment, the first parameter is used to determine the second offset time length.

Example 8

Example 8 illustrates a schematic diagram of a reference moment and a second time window according to the present application; as shown in fig. 8. In fig. 8, the reference time is equal to the end time of a first time window in the figure, the first node receives the second signal in the present application in the first time window, and the first identifier in the present application is not carried in the second signal; the first node transmits the target signal in the application in the second time window; the first time length shown in the figure is equal to the length of the time interval between the starting instant of the second time window and the reference instant.

For one embodiment, the second time window includes a positive integer number of time slots.

As an embodiment, the first node transmits the target signal in one time slot of a positive integer number of time slots included in the second time window.

As an embodiment, the target signal is used to re-initiate random access after determining that random access initiated by the first signal fails.

Example 9

Example 9 illustrates a schematic diagram of another reference moment and a second time window according to the present application; as shown in fig. 9. In fig. 9, the reference time is equal to the end time of the third time window in the figure, the first node receives the second signal in the present application in the first time window, and the first identifier in the present application is carried in the second signal; the first node transmitting the third signal and receiving the fourth signal in the third time window; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the first node considers that the random access initiated by the first signal fails after receiving the fourth signal; then the first node sends a target signal in a second time window in the graph; the ending time of the third time window in the time domain is a reference time in the present application, and the first time length in the present application is equal to the time interval length between the starting time of the second time window and the reference time.

For one embodiment, the third time window includes a positive integer number of time slots.

As an embodiment, the first node detects the fourth signal in one of a positive integer number of time slots comprised by the third time window.

As an embodiment, a time interval between the time domain ending time of the first time window and the time domain starting time of the third time window is greater than the second offset time length in this application.

As an embodiment, a time interval between a transmission ending time of the third signal and a starting time of the third time window in a time domain is equal to the second offset time length in this application.

As an embodiment, a time interval between a time domain ending time of the first time window and a time domain starting time of the third time window is greater than the first offset time length in this application.

As an embodiment, a time interval between a transmission ending time of the third signal and a starting time of the third time window in a time domain is equal to the first offset time length in this application.

Example 10

Example 10 illustrates a schematic diagram of a first time length group, as shown in fig. 10. In fig. 10, the first parameter is used to determine a first group of time lengths from M1 candidate groups of time lengths, the first group of time lengths including a first set of time lengths and a second set of time lengths; the set of target lengths of time is one of the set of first lengths of time and the set of second lengths of time; whether the second signal carries the first identity is used to determine the set of target time lengths from the set of first time lengths and the set of second time lengths; the first indication is used to indicate the first length of time from the set of target lengths of time.

As shown in fig. 10, the M1 candidate time length groups respectively correspond to the candidate time length group #1 through the candidate time length group # M1 in the drawing; candidate length of time group # i is any one of the M1 candidate length of time groups, the i being a positive integer greater than 0 and not greater than M1; the set of candidate time lengths # i comprises a first set of candidate time lengths # i and a second set of candidate time lengths # i; the first candidate time length set # i corresponds to a case that the second signal does not carry the first identifier, and the second candidate time length set # i corresponds to a case that the second signal carries the first identifier; the first set of candidate time lengths # i comprises Q1 first class candidate time lengths, respectively first class candidate time lengths # i _1 through # i _ Q1; the second set of candidate time lengths # i comprises Q1 second-class candidate time lengths, respectively second-class candidate time lengths # i _1 to second-class candidate time lengths # i _ Q1.

As an embodiment, the first group of time lengths is one of the M1 candidate groups of time lengths.

Example 11

Embodiment 11 illustrates a schematic diagram of a transmission delay according to the present application; as shown in fig. 11. In fig. 11, the first node transmits a first signal in a second time unit, the first signal arriving at the second node in a first target time unit of the second node after Td milliseconds; the second node then transmits the second signal in a second target time unit, the second signal arriving at the first node again after Td milliseconds; subsequently the first node sends a third signal in a third target time unit, the third signal arriving at the second node in a fourth target time unit of the second node after Td milliseconds; the second node then transmits the fourth signal in a fifth target time unit, the fourth signal arriving at the first node again after Td milliseconds.

As can be seen, after the first node transmits the first signal, the first node does not receive RAR from the second node for at least the following 2 × Td ms, which can be used for random access by other UEs, and for the first node, the 2 × Td ms is a naturally occurring back-off time. Similarly, after the first node transmits the third signal, the first node does not receive a collision resolution signal, i.e., a fourth signal, from the second node for at least the following 2 × Td milliseconds, which can be used for random access by other UEs, and for the first node, the 2 × Td milliseconds is also a naturally occurring back-off time.

As an embodiment, the first target time unit is a time slot.

As an embodiment, the first target time unit is a subframe.

As an embodiment, the second target time unit is a time slot.

As an embodiment, the second target time unit is a subframe.

As an embodiment, the third target time unit is a time slot.

As an embodiment, the third target time unit is a subframe.

As an embodiment, the fourth target time unit is a time slot.

As an embodiment, the fourth target time unit is a subframe.

As an embodiment, the fifth target time unit is a time slot.

As an embodiment, the fifth target time unit is a subframe.

Example 12

Example 12 illustrates a schematic diagram of a first time unit and a second time unit according to the present application; as shown in fig. 12. In fig. 12, the first time unit is a time unit reserved for the first signal transmission and determined by the first node according to downlink timing, and the second time unit is a time unit actually transmitted by the first node after pre-compensating for transmission delay.

As an embodiment, the transmission delay comprises only the transmission delay of the second node to the near site.

As one embodiment, the transmission delay includes a transmission delay of the second node to the first node.

As an example, the TA shown in the figure is equal to 2 times the transmission delay of said second node to the near site.

For one embodiment, TA shown in the figure is equal to 2 times the transmission delay of the second node to the first node.

Example 13

Embodiment 13 is a block diagram illustrating the structure of a first node, as shown in fig. 13. In fig. 13, a first node 1300 includes a first receiver 1301, a first transmitter 1302, a first transceiver 1303 and a second transmitter 1304.

A first receiver 1301 which receives first information;

a first transmitter 1302 that transmits a first signal;

a first transceiver 1303 for receiving the second signal;

a second transmitter 1304 that transmits the target signal in a second time window;

in embodiment 13, a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; the time domain cut-off instant of the first signal is used to determine a first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of the second time window and the reference time.

As an embodiment, when the second signal does not carry the first identifier, the reference time is equal to an end time of the first time window.

As an embodiment, when the second signal carries the first identifier, the first transceiver 1303 sends a third signal, and the first transceiver 1303 receives a fourth signal; the cutoff instant of the third signal is used to determine a third time window; the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation coding mode adopted by the third signal; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

As an embodiment, the first indication is used to indicate a target length of time, the first information includes a first parameter used to determine a first offset length of time, whether the second signal carries the first identity is used to determine a first coefficient; the target length of time, the first offset length of time and the first coefficient are used together to determine a second length of time; the first time length is equal to T1 ms, the second time length is equal to T2 ms, the T1 is a non-negative integer, the T1 is a non-negative integer randomly selected by the first node from 0 to T2 in a uniform distribution; the T2 is not less than the T1.

As an embodiment, the first time length is equal to the target time length minus a product of the first coefficient and the first offset time length.

As an example; when the target time length is greater than a product of the first coefficient and a first offset time length, the first time length is equal to a difference obtained by subtracting the product of the first coefficient and the first offset time length from the target time length; or, when the target time length is not greater than the product of the first coefficient and the first offset time length, the first time length is equal to 0.

As an example; when the second signal does not carry the first identifier, the first coefficient is equal to K1; or, when the second signal carries the first identity, the first coefficient is equal to twice K1; the K1 is a positive integer.

As an embodiment, the first parameter relates to a height of the sender of the second signal, or the first parameter relates to a type of the sender of the second signal, or the first parameter relates to a distance of the first node to the sender of the second signal.

For one embodiment, the first receiver 1301 receives a fifth signal; the fifth signal is used to determine a first time unit, the first signal is transmitted in a second time unit, a length of a time interval between a start time of the first time unit and a start time of the second time unit is related to the first parameter; the starting time of the second time unit is earlier than the starting time of the first time unit.

For one embodiment, the first receiver 1301 receives a sixth signal; the sixth signal is used to determine a first target time window in which the first signal is received by the sender of the sixth signal.

For one embodiment, the first receiver 1301 includes at least the first 4 of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456, and the controller/processor 459 in embodiment 4.

As one embodiment, the first transmitter 1302 includes at least the first 4 of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller/processor 459 of embodiment 4.

As an embodiment, the first transceiver 1303 includes at least the first 6 of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the transmitter 454, the multi-antenna transmitting processor 457, the transmitting processor 468, and the controller/processor 459 in embodiment 4.

For one embodiment, the second transmitter 1304 comprises at least the first 4 of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, and the controller/processor 459 of embodiment 4.

Example 14

Embodiment 14 illustrates a block diagram of the structure in a second node, as shown in fig. 14. In fig. 14, the second node 1400 comprises a third transmitter 1401, a second receiver 1402, a second transceiver 1403 and a third receiver 1404.

A third transmitter 1401 which transmits the first information;

a second receiver 1402 receiving the first signal;

a second transceiver 1403, which transmits a second signal;

a third receiver 1404 that receives the target signal;

in embodiment 14, a first sequence is used to generate the first signal, the first sequence being used to determine a first identity; the time frequency resource occupied by the first signal is used for determining a second identifier, and the second signal carries the second identifier; the second signal carries a first indication, the first indication being a non-negative integer; whether the second signal carries the first identity, the first information and the first indication are used together to determine a first length of time; a sender of the first signal determines a first time window through a time domain transmission cut-off time of the first signal; a sender of the first signal receives the second signal in the first time window; whether the second signal carries the first identifier is used for determining whether the end time of the first time window is equal to a reference time, and the first time length is used for determining the time interval length between the start time of a second time window and the reference time; the sender of the first signal sends the target signal in the second time window.

As an embodiment, when the second signal carries the first identity, the second transceiver 1403 receives a third signal and the second transceiver 1403 sends a fourth signal; the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation coding mode adopted by the third signal; the sender of the third signal determines a third time window according to the sending cutoff time of the third signal; a sender of the third signal receives the fourth signal in the third time window; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

As an embodiment, when the target time length is greater than a product of the first coefficient and a first offset time length, the first time length is equal to a difference obtained by subtracting the product of the first coefficient and the first offset time length from the target time length; or, when the target time length is not greater than the product of the first coefficient and the first offset time length, the first time length is equal to 0.

As an example, when the second signal does not carry the first identity, the first coefficient is equal to K1; or, when the second signal carries the first identity, the first coefficient is equal to twice K1; the K1 is a positive integer.

As an example, the third transmitter 1401 transmits a fifth signal; the fifth signal is used to determine a first time unit, the first signal is transmitted in a second time unit, a length of a time interval between a start time of the first time unit and a start time of the second time unit is related to the first parameter; the starting time of the second time unit is earlier than the starting time of the first time unit.

As an example, the third transmitter 1401 transmits a sixth signal; the sixth signal is used to determine a first target time window in which the second node receives the first signal.

As one example, the third transmitter 1401 includes at least the first 4 of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, and the controller/processor 475 of example 4.

For one embodiment, the second receiver 1402 includes at least the first 4 of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475 of embodiment 4.

For one embodiment, the second transceiver 1403 includes at least the first 6 of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475 in embodiment 4.

For one embodiment, the third receiver 1404 includes at least the first 4 of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475 of embodiment 4.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. First node and second node in this application include but not limited to cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, vehicles, vehicle, RSU, aircraft, unmanned aerial vehicle, wireless communication equipment such as remote control plane. The base station in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a transmission and reception node TRP, a GNSS, a relay satellite, a satellite base station, an over-the-air base station, an RSU, and other wireless communication devices.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node for use in wireless communications, comprising:

a first receiver receiving first information;

a first transmitter that transmits a first signal;

a first transceiver to receive a second signal;

a second transmitter for transmitting the target signal in a second time window;

2. The first node according to claim 1, wherein the reference time is equal to an end time of the first time window when the second signal does not carry the first identity.

3. The first node according to any of claims 1 or 2, wherein when the second signal carries the first identity, the first transceiver transmits a third signal and the first transceiver receives a fourth signal; the cutoff instant of the third signal is used to determine a third time window; the second signal carries first scheduling information, and the first scheduling information is used for determining time-frequency resources occupied by the third signal and a modulation coding mode adopted by the third signal; the third signal carries a third identifier, the fourth signal carries a fourth identifier, and the third identifier and the fourth identifier are different; the reference moment is equal to the end moment of the third time window.

4. The first node according to any of claims 1-3, wherein the first indication is used to indicate a target length of time, wherein the first information comprises a first parameter used to determine a first offset length of time, wherein whether the second signal carries the first identity is used to determine a first coefficient; the target length of time, the first offset length of time and the first coefficient are used together to determine a second length of time; the first time length is equal to T1 ms, the second time length is equal to T2 ms, the T1 is a non-negative integer, the T1 is a non-negative integer randomly selected by the first node from 0 to T2 in a uniform distribution; the T2 is not less than the T1.

5. The first node of claim 4, wherein the first length of time is equal to the target length of time minus a product of the first coefficient and the first offset length of time.

6. The first node of claim 4, wherein; when the target time length is greater than a product of the first coefficient and a first offset time length, the first time length is equal to a difference obtained by subtracting the product of the first coefficient and the first offset time length from the target time length; or, when the target time length is not greater than the product of the first coefficient and the first offset time length, the first time length is equal to 0.

7. The first node according to any of claims 4 to 6, characterized by; when the second signal does not carry the first identifier, the first coefficient is equal to K1; or, when the second signal carries the first identity, the first coefficient is equal to twice K1; the K1 is a positive integer.

8. The first node of any of claims 1 to 3, wherein the first parameter is used to determine a first group of time lengths from M1 candidate groups of time lengths, the first group of time lengths comprising a first set of time lengths and a second set of time lengths; the set of target lengths of time is one of the set of first lengths of time and the set of second lengths of time; whether the second signal carries the first identity is used to determine the set of target time lengths from the set of first time lengths and the set of second time lengths; the first indication is used to indicate the first length of time from the set of target lengths of time.

9. The first node according to any of claims 4 to 8, characterized in that the first parameter relates to the height of the sender of the second signal, or the first parameter relates to the type of the sender of the second signal, or the first parameter relates to the distance of the first node to the sender of the second signal.

10. A second node for use in wireless communications, comprising:

a third transmitter for transmitting the first information;

a second receiver receiving the first signal;

a second transceiver to transmit a second signal;

a third receiver for receiving a target signal;

11. A method in a first node in wireless communication, comprising:

receiving first information;

transmitting a first signal;

receiving a second signal;

transmitting the target signal in a second time window;

12. A method in a second node in wireless communication, comprising:

sending first information;

receiving a first signal;

transmitting a second signal;

receiving a target signal;