CN113038548B

CN113038548B - Method and apparatus in a node used for wireless communication

Info

Publication number: CN113038548B
Application number: CN201911356212.2A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2022-09-09
Anticipated expiration: 2039-12-25
Also published as: CN115412983A; CN113038548A

Abstract

A method and apparatus in a node used for wireless communication is disclosed. A first node receives a first signal and a second signal; transmitting a third signal when both the first condition and the second condition are satisfied; the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal. The method and the device for switching the low-delay base station between the large-delay network and the low-delay network provide a new switching scheme, and when the first node meets the first condition and the second condition, the first node is directly connected with the target low-delay base station while being connected with the large-delay network, so that switching delay is reduced.

Description

Method and apparatus in a node used for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to a transmission method and apparatus with a large delay.

Background

In a conventional cell Handover process, when a UE is in an RRC (Radio Resource Control) connected state (RRC _ connected), a base station may determine whether to Handover the UE from a source cell to a target cell based on a measurement result of the UE, where the Handover process includes Handover Preparation (Handover Preparation), Handover Execution (Handover Execution), and Handover Completion (Handover Completion) phases. In the face of higher and higher communication demands, 3GPP (3rd generation partner Project) started to research Non-Terrestrial Network communication (NTN), and 3GPP ran #80 meetings decided to develop a research Project of "NR (new radio, new air interface) solution supporting Non-Terrestrial Network", which is a continuation of the research Project of "NR supporting Non-Terrestrial Network" in the former (RP-171450). Among them, Mobility (Mobility) of NTN is an important research aspect.

Disclosure of Invention

Compared with a TN (Terrestrial Network) Network, the NTN Network is mainly characterized by large transmission delay and regular movement of an NTN base station. When the switching process is executed in the NTN, the time delay and the interruption time experienced by the UE are far longer than those of the TN network, and it is likely that switching failure occurs in some steps in the switching process, and the UE will execute RRC reestablishment (Re-establishment) after the switching failure. If the link quality of the current NTN cell measured by the NTN UE is poor, cell handover is triggered, and if handover from the source NTN base station to the target TN base station is performed, a complete handover process requires signaling interaction between the source NTN base station and the target TN base station for many times, and a large time delay occurs every time signaling transmission is performed between the source NTN base station and the target TN base station, such as UE measurement report, signaling transmission between the source NTN base station and the target TN base station, and the like. On the other hand, since only wireless transmission can be used between the NTN base stations or between the NTN base station and the TN base station, when the Link quality between the UE and the source NTN base station is poor, the Link quality between the source NTN base station and the target TN base station is also poor with a high probability, and RLF (Radio Link Failure) may occur in any step in the handover procedure. When the UE is switched from the source NTN base station to the target TN base station, the switching condition and the switching flow need to be redesigned to reduce the large delay caused by the switching.

In view of the above, the present application provides a solution. In the above description of the problem, an NTN scenario is taken as an example; the application is also applicable to the scenes such as ground transmission, and the technical effect similar to that in NTN scenes is achieved. In addition, the adoption of a unified solution for different scenes also helps to reduce hardware complexity and cost.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments in any node of the present application may be applied to any other node. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

The application discloses a method used in a first node for wireless communication, which is characterized by comprising

Receiving a first signal and a second signal;

transmitting a third signal when both the first condition and the second condition are satisfied;

wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal.

As an embodiment, the problem to be solved by the present application includes: how to shorten the time delay of the UE switching from the source base station to the target base station when the wireless link of the source base station cannot continuously provide connection for the UE and the target base station meets the access condition of the UE and needs to execute cell switching.

As an embodiment, the characteristics of the above method include: configuring a first condition and a second condition for the UE, when the first condition and the second condition are simultaneously met, the UE can decide to execute the switching from the source base station to the target base station, and the UE keeps the connection with the source base station while switching so as to ensure that the switching can be terminated at any time, or the source base station initiates the switching, or the condition switching is executed.

As an example, the benefits of the above method include: the UE directly establishes connection with the target base station, so that signaling transmission from the source base station to the target base station can be avoided, and switching time delay is reduced.

As an embodiment, the characteristics of the above method include: the first condition is measurement dependent and the second condition is measurement independent.

As an embodiment, the benefits of the above method include: by setting a strict switching condition, frequent switching and unnecessary switching are avoided, and the effectiveness of switching is improved.

According to one aspect of the application, a fourth signal is received; wherein the fourth signal is used to determine whether a connection is successfully established between the first node and a sender of the first signal; the fourth signal includes an identification of the first node and a resource allocated to the first node.

As an embodiment, the characteristics of the above method include: the third signal and the fourth signal are used to perform a two-Step random access (2-Step RACH).

As an example, the benefits of the above method include: and further shortening the time delay of establishing connection between the UE and the target base station through a two-step random access process.

According to an aspect of the application, the second condition relates to whether the sender of the first signal is included in the list of candidate nodes of the first node.

According to one aspect of the present application, the sender of the first signal corresponds to a first parameter, the sender of the second signal corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

According to an aspect of the application, characterized in that the second condition relates to a traffic type of the first node.

According to one aspect of the present application, there is provided receiving first signaling; the first signaling is used to enable cell handover based on the first condition and the second condition.

As an embodiment, the characteristics of the above method include: enabling a cell handover based on the first condition and the second condition only for a user equipment in need.

As an example, the benefits of the above method include: whether the user equipment enables cell switching based on the first condition and the second condition can be flexibly configured, and unnecessary switching and frequent switching are avoided.

According to one aspect of the present application, it is characterized in that when the first condition is satisfied, a fifth signal is transmitted; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the receiver of the fifth signal is the sender of the second signal; a recipient of the third signal is different from a recipient of the fifth signal.

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

transmitting a first signal;

receiving a third signal when both the first condition and the second condition are satisfied;

wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second signal is transmitted by a maintaining base station of a serving cell of a recipient of the first signal; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by a recipient of the first signal to establish a connection with the second node.

According to one aspect of the application, it is characterized in that a fourth signal is transmitted; wherein the fourth signal is used to determine whether a connection is successfully established between the recipient of the first signal and the second node; the fourth signal includes an identification of a recipient of the first signal and a resource allocated to the recipient of the first signal.

According to an aspect of the application, the second condition relates to whether the second node is included in a list of candidate nodes of the receiver of the first signal.

According to one aspect of the application, the second node corresponds to a first parameter, the sender of the second signal corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

According to an aspect of the application, characterized in that the second condition relates to a traffic type of a recipient of the first signal.

According to one aspect of the application, the first signaling is transmitted by the sender of the second signal; the first signaling is used to enable cell handover based on the first condition and the second condition.

According to one aspect of the present application, characterized in that when the first condition is satisfied, a fifth signal is received by a sender of the second signal; wherein the fifth signal relates to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; a recipient of the third signal is different from a recipient of the fifth signal.

The application discloses a method in a third node used for wireless communication, characterized by comprising:

transmitting a second signal and a first signaling;

wherein the first signaling is used to enable cell handover based on a first condition and a second condition; the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the first signal is transmitted by a neighbor node of the third node; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal.

According to one aspect of the present application, it is characterized in that when both the first condition and the second condition are satisfied, the third signal is received by the sender of the first signal; the third signal is used by a receiver of the second signal to establish a connection with a sender of the first signal.

According to one aspect of the application, the second condition relates to whether the sender of the first signal is included in a list of candidate nodes for the receiver of the second signal.

According to one aspect of the application, the sender of the first signal corresponds to a first parameter, the third node corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

According to an aspect of the application, characterized in that the second condition relates to a quality of service of a recipient of the second signal.

According to one aspect of the present application, a receiver of the second signal receives a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between a recipient of the second signal and a sender of the first signal; the fourth signal includes an identification of a recipient of the second signal and a resource allocated to the recipient of the second signal.

According to one aspect of the present application, characterized in that,

receiving a fifth signal when the first condition is satisfied;

wherein the fifth signal relates to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the first length of time is configurable.

The present application discloses a first node for wireless communication, comprising:

a first receiver receiving a first signal and a second signal;

a first transmitter that transmits a third signal when both the first condition and the second condition are satisfied;

The present application discloses a second node for wireless communication, comprising:

a second transmitter that transmits the first signal;

a second receiver that receives a third signal when both the first condition and the second condition are satisfied;

The present application discloses a third node used for wireless communication, comprising:

a third transmitter for transmitting the second signal and the first signaling;

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

the transmission delay of the NTN is far longer than that of the TN network, when the user equipment is switched from the source NTN base station to the target TN base station, signaling interaction between the NTN and the TN network needs to be executed for many times in the switching process, and each signaling interaction brings great delay.

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 shows a flow diagram of transmission of a first signal, a second signal, and a third signal 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 wireless signal transmission according to one embodiment of the present application;

FIG. 6 illustrates a diagram where quality of service of a first node is used to determine a second condition according to one embodiment of the present application;

FIG. 7 shows an illustration of a first parameter and a second parameter being used together to determine a second condition according to an embodiment of the application;

FIG. 8 shows a schematic diagram of an alternate node list according to an embodiment of the present application;

FIG. 9 illustrates a schematic diagram of a trigger condition of a third signal according to an embodiment of the present application;

fig. 10 shows a schematic diagram in which first signaling is used to enable cell handover based on a first condition and a second condition according to another embodiment of the present application;

FIG. 11 shows a schematic view of a first length of time according to an embodiment of the present application;

FIG. 12 shows a block diagram of a processing device for use in a first node according to an embodiment of the present application;

figure 13 shows a block diagram of a processing arrangement for use in a second node according to an embodiment of the present application;

fig. 14 shows a block diagram of a processing device for use in a third 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 in the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of transmission of a first signal, a second signal and a third signal according to an embodiment of the present application, as shown in fig. 1. In fig. 1, each block represents a step, and it is particularly emphasized that the sequence of the blocks in the figure does not represent a chronological relationship between the represented steps.

In embodiment 1, a first node in the present application receives the first signal and the second signal in step 101; transmitting the third signal in step 102; wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal.

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

As an example, the first signal is a Baseband (Baseband) signal.

As an embodiment, the first Signal is a Reference Signal (RS).

As an embodiment, the first signal is a Physical Layer (PHY) signal.

For one embodiment, the first signal is transmitted over an air interface.

For one embodiment, the first signal is transmitted through an antenna port.

As an embodiment, the sender of the first signal is a target base station.

As an embodiment, the sender of the first signal is a neighbor node of the sender of the second signal.

As an embodiment, the sender of the first signal is a large delay base station.

As an embodiment, the sender of the first signal is an NTN base station.

As an embodiment, the measurement result for the first Signal comprises RSRP (Reference Signal Received Power) obtained for the measurement of the first Signal.

As an embodiment, the measurement result for the first Signal comprises RSRQ (Reference Signal Received Quality) obtained for the measurement of the first Signal.

As an embodiment, the measurement result for the first Signal comprises a Received Signal Strength Indicator (RSSI) obtained for the measurement of the first Signal.

As one embodiment, the measurement result for the first Signal includes SINR (Signal to Noise and Interference Ratio) obtained for the measurement of the first Signal.

As one embodiment, the measurement result for the first signal includes a Channel state Information reference signal resource indicator (CRI) obtained for the measurement of the first signal.

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

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

As an embodiment, the second signal is a reference signal.

For one embodiment, the second signal is a physical layer signal.

For one embodiment, the second signal is transmitted over an air interface.

For one embodiment, the second signal is transmitted through an antenna port.

As an embodiment, the sender of the second signal is a source base station.

As an embodiment, the sender of the second signal is a maintaining base station of a serving cell of the first node.

As an embodiment, the sender of the second signal is a low latency base station.

As an embodiment, the sender of the second signal is a TN base station.

As one embodiment, the measurement result for the second signal comprises an RSRP obtained for the measurement of the second signal.

As one embodiment, the measurement result for the second signal comprises an RSRQ obtained for the measurement of the second signal.

As one embodiment, the measurement result for the second signal comprises RSSI obtained for the measurement of the second signal.

As an embodiment, the measurement result for the second signal comprises a SINR obtained by measurement for the first signal.

As one embodiment, the measurement result for the second signal includes a CRI obtained for the measurement of the first signal.

As an embodiment, the measurement result for the second signal corresponds to the same measurement quantity as the measurement result for the first signal.

As one embodiment, the first condition includes the measurement for the first signal being greater than the measurement for the second signal.

As a sub-embodiment of this embodiment, the sentence wherein the first condition comprises that the measurement for the first signal is greater than the measurement for the second signal comprises the following meaning: the link quality between the sender of the first signal and the first node is better than the link quality between the sender of the second signal and the first node.

As an embodiment, the first condition comprises the measurement for the first signal being greater than a first threshold and the measurement for the second signal being less than a second threshold.

As a sub-embodiment of this embodiment, the first threshold is configurable.

As a sub-embodiment of this embodiment, the first threshold is a fixed size.

As a sub-embodiment of this embodiment, the first threshold is configured by a sender of the second signal to the first node.

As a sub-embodiment of this embodiment, the second threshold is configurable.

As a sub-embodiment of this embodiment, the second threshold is a fixed size.

As a sub-embodiment of this embodiment, the second threshold is configured by a sender of the second signal to the first node.

As a sub-embodiment of this embodiment, the first threshold is different from the second threshold.

As one embodiment, the first condition includes that a sum of the measurement result for the first signal and a first offset is greater than the measurement result for the second signal.

As an embodiment, the first offset is used to determine whether the first condition is satisfied only when cell handover based on the first condition and the second condition is enabled.

As a sub-embodiment of this embodiment, the first offset is a positive number.

As a sub-embodiment of this embodiment, the first offset is a negative number.

As a sub-embodiment of this embodiment, the unit of the first offset is dB.

As a sub-embodiment of this embodiment, the first offset is configured by a sender of the second signal.

As a sub-embodiment of this embodiment, the first offset is determined by the first node.

As a sub-embodiment of this embodiment, the unit of the first offset amount is the same as the unit of the measurement result of the first signal and the measurement result of the second signal.

As an embodiment, the meaning that the sentence that the second condition is independent of the measurement result for the first signal comprises: the first node does not determine whether the second condition is satisfied according to the measurement result of the first signal.

As an embodiment, the meaning that the sentence that the second condition is independent of the measurement result for the first signal comprises: whether the second condition is satisfied is independent of a measurement result for the first signal.

As an embodiment, the meaning that the sentence that the second condition is independent of the measurement result for the second signal comprises: the first node does not determine whether the second condition is satisfied according to the measurement result of the second signal.

As an embodiment, the meaning of the sentence that the second condition is independent of the measurement result for the second signal comprises: whether the second condition is satisfied is independent of a measurement for the second signal.

As an embodiment, the first condition and the second condition are used to perform a cell Handover (Handover).

As one embodiment, the first condition and the second condition are used to perform Cell Selection (Cell Selection).

As one embodiment, the first condition and the second condition are used to perform Cell Reselection (Cell Reselection).

As one embodiment, the first condition and the second condition are used to initiate Random Access (RA).

As one embodiment, the first condition and the second condition are used to make a State Transition (State Transition).

As a sub-embodiment of this embodiment, the first node transitions from an RRC Connected state (RRC Connected) to an RRC Inactive state (RRC Inactive) when the first condition and the second condition are satisfied.

As a sub-embodiment of this embodiment, the first node transitions from an RRC Connected state (RRC _ Connected) to an RRC Idle state (RRC _ Idle) when the first condition and the second condition are satisfied.

As an embodiment, the receiver of the third signal is a target base station.

As an embodiment, the receiver of the third signal is the sender of the first signal.

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

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

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

As an embodiment, the third signal is a physical layer signal.

For one embodiment, the third signal is transmitted over an air interface.

As an embodiment, the third signal is transmitted through an antenna port.

As an embodiment, the third signal is transmitted through a PRACH (Physical Random Access Channel).

As an embodiment, the third signal is a Random Access (RA) signal.

As an embodiment, the third signal is used to initiate a four-step random access (4-step RACH) procedure.

As an example, the third signal is Message 1(Message 1, Msg 1).

As one embodiment, the third signal includes a Preamble sequence (Preamble).

As an embodiment, the third signal includes Context (Context) information of the first node.

As an embodiment, the third signal is used to initiate a two-step random access (2-step RACH) procedure.

As an embodiment, the third signal is a Message a (MsgA).

For one embodiment, the third signal includes a first sub-signal and a second sub-signal.

As a sub-embodiment of this embodiment, the physical layer channel carrying the first sub-signal is a PRACH.

As a sub-embodiment of this embodiment, the Physical layer Channel carrying the second sub-signal is a PDSCH (Physical Downlink Shared Channel).

As a sub-embodiment of this embodiment, the first sub-signal comprises Message 1(Message 1, Msg 1); wherein the message 1 is used to perform a 4-step RACH.

As a sub-embodiment of this embodiment, the first sub-signal includes a Preamble sequence (Preamble).

As a sub-embodiment of this embodiment, the second sub-signal comprises Message 3(Message 3, Msg 3); wherein the message 3 is used to perform a 4-step RACH.

As a sub-embodiment of this embodiment, the second sub-signal comprises a Payload (Payload).

As a sub-embodiment of this embodiment, the second sub-signal includes a user identity (UE identifier).

As a sub-embodiment of this embodiment, the second sub-signal includes an RRC Connection Request (RRC Connection Request) message.

As a sub-embodiment of this embodiment, the second sub-signal includes an RRC Connection Re-establishment Request (RRC Connection Re-establishment Request) message.

As a sub-embodiment of this embodiment, the second sub-signal comprises an RRC Handover Confirm (RRC Handover Confirm) message.

As a sub-embodiment of this embodiment, the second sub-signal comprises a Buffer Status Report (BSR) message.

As an embodiment, when the third signal is transmitted, a connection is maintained between the first node and a sender of the second signal.

As an embodiment, the first node is in an RRC _ CONNECTED state when the third signal is transmitted.

As an embodiment, the first node is disconnected from the sender of the second signal when the third signal is sent.

As an embodiment, when the third signal is transmitted, the uplink timing of the first node and the sender of the second signal is out of synchronization.

As an embodiment, said sentence said third signal is used by said first node for establishing a connection with a sender of said first signal comprises the following meanings: the third signal is used for a first message sent by the first node when switching from the sender of the second signal to the sender of the first signal.

As an embodiment, said sentence said third signal is used by said first node for establishing a connection with a sender of said first signal comprises the following meanings: the first node sends a random access request message to a sender of the first signal.

As an embodiment, the sentence used by the first node to establish a connection with the sender of the first signal comprises the following meaning: the third signal is used for a first message sent by the first node to a sender of the first signal when Cell Selection (Cell Selection) is performed.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in fig. 2. Fig. 2 illustrates a diagram of a network architecture 200 of a 5G NR (New Radio, New air interface), LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution-Advanced) system. The 5G NR or LTE network architecture 200 may be referred to as a 5GS (5G System)/EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, NG-RANs (next generation radio access networks) 202, 5 GCs (5G Core networks )/EPCs (Evolved Packet cores) 210, HSS (Home Subscriber Server)/UDMs (Unified Data Management) 220, and internet services 230. The 5GS/EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the 5GS/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 terminations 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 the UE201 with an access point to the 5GC/EPC 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 is connected to the 5GC/EPC210 through the S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity)/AMF (Authentication Management domain)/SMF (Session Management Function) 211, other MME/AMF/SMF214, S-GW (serving Gateway)/UPF (User Plane Function) 212, and P-GW (Packet data Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW/UPF213 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 UE201 supports transmission in a non-terrestrial network (NTN).

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

As an embodiment, the UE201 supports transmissions of a Terrestrial Network (TN).

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

As an embodiment, the gNB203 corresponds to the third node in the present application.

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

As an embodiment, the gNB203 supports transmission in large latency difference networks.

As one embodiment, the gNB203 supports transmissions of a Terrestrial Network (TN).

As an example, the gNB203 is a macro Cellular (Marco Cellular) base station.

As an embodiment, the gNB203 is a Micro Cell (Micro Cell) base station.

As an embodiment, the gNB203 is a Pico Cell (Pico Cell) base station.

As an embodiment, the gNB203 is a home base station (Femtocell).

As an embodiment, the gNB203 is a base station device supporting a large delay difference.

As an example, the gNB203 is a flight platform device.

As an embodiment, the gNB203 is a satellite device.

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 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. Above the PHY301, a layer 2(L2 layer) 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control Protocol) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by ciphering packets and provides handover support. 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. 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. The radio protocol architecture of the user plane 350, which includes layer 1(L1 layer) and layer 2(L2 layer), is substantially the same in the user plane 350 as the corresponding layers and sublayers in the control plane 300 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, 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.

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 example, the radio protocol architecture in fig. 3 is applicable to the third node in the present application.

As an embodiment, the first signal in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the second signal in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the third signal in this application is generated in the RRC 306.

As an embodiment, the third signal in this application is generated in the MAC302 or the MAC 352.

As an embodiment, the third signal in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the fourth signal in this application is generated in the RRC 306.

As an embodiment, the fourth signal in this application is generated in the MAC302 or the MAC 352.

As an embodiment, the fourth signal in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the fifth signal in this application is generated in the RRC 306.

As an embodiment, the fifth signal in this application is generated in the MAC302 or the MAC 352.

As an embodiment, the fifth signal in the present application is generated from the PHY301 or the PHY 351.

As an embodiment, the first signaling in this application is generated in the RRC 306.

As an embodiment, the first signaling in this application is generated in the MAC302 or the MAC 352.

As an embodiment, the first signaling in the present application is generated in the PHY301 or the PHY 351.

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 multi-carrier 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 received analog precoded/beamformed baseband multicarrier symbol stream 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 communication 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. The transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming, by the multi-antenna transmit processor 457, and then the transmit processor 468 modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to the different antennas 452 via the 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 may 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 a first signal and a second signal; transmitting a third signal when both the first condition and the second condition are satisfied; wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal.

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 a first signal and a second signal; transmitting a third signal when both the first condition and the second condition are satisfied; wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal.

The second node is, as an embodiment, structurally identical to the second communication device 410.

As one embodiment, the second node 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 node at least: transmitting a first signal; receiving a third signal when both the first condition and the second condition are satisfied; wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second signal is transmitted by a maintaining base station of a serving cell of a recipient of the first signal; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by a recipient of the first signal to establish a connection with the second node.

As one embodiment, the second node includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting a first signal; receiving a third signal when both the first condition and the second condition are satisfied; wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second signal is transmitted by a maintaining base station of a serving cell of a recipient of the first signal; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by a recipient of the first signal to establish a connection with the second node.

As an embodiment, the structure of the third node is the same as the second communication device 410.

As one embodiment, the third node 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 third node at least: transmitting a second signal and a first signaling; wherein the first signaling is used to enable cell handover based on a first condition and a second condition; the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the first signal is transmitted by a neighbor node of the third node; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal.

As one embodiment, the third node includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting a second signal and a first signaling; wherein the first signaling is used to enable cell handover based on a first condition and a second condition; the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the first signal is transmitted by a neighbor node of the third node; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal.

For one embodiment, the antenna 452, the receiver 454, the receive processor 456, the controller/processor 459 are configured to receive a first signal and a fourth signal; at least one of the antenna 420, the transmitter 418, the transmit processor 416, the controller/processor 475 is configured to transmit a first signal and a fourth signal.

For one embodiment, the antenna 452, the receiver 454, the receive processor 456, the controller/processor 459 are configured to receive a second signal and a first signaling; at least one of the antenna 420, the transmitter 418, the transmit processor 416, the controller/processor 475 is configured to transmit a first signal and a first signaling.

As one implementation, the antenna 452, the transmitter 454, the transmit processor 468, the controller/processor 459 are used to send a third signal; at least one of the antenna 420, the receiver 418, the receive processor 470, the controller/processor 475 is configured to receive a third signal.

As one implementation, the antenna 452, the transmitter 454, the transmit processor 468, the controller/processor 459 are used to send a fifth signal; at least one of the antenna 420, the receiver 418, the receive processor 470, the controller/processor 475 is configured to receive a fifth signal.

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.

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

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

As an embodiment, the first communication device 450 is a user equipment supporting a large delay difference.

As an embodiment, the first communication device 450 is a user equipment supporting NTN.

As an example, the first communication device 450 is an aircraft device.

For one embodiment, the first communication device 450 is location-enabled.

As an example, the first communication device 450 does not have a capability specification.

As an embodiment, the first communication device 450 is a TN-capable user equipment.

As an embodiment, the second communication device 410 is a base station device (gNB/eNB/ng-eNB).

As an embodiment, the second communication device 410 is a base station device supporting large delay difference.

As an embodiment, the second communication device 410 is a base station device supporting NTN.

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

For one embodiment, the second communication device 410 is a flying platform device.

As an embodiment, the second communication device 410 is a base station device supporting TN.

As an embodiment, when the second communication device 410 corresponds to the second node, the second communication device 410 is a base station device supporting NTN; when the second communication device 410 corresponds to the third node, the second communication device 410 is a base station device supporting TN.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 5. The second node N02 is the target base station of the first node U01; the third node N03 is the source base station of the first node U01; it is specifically noted that the order in this example does not limit the order of signal transmission and the order of implementation in this application.

For theFirst node U01The first signaling is received in step S5101, the first signal is received in step S5102, the second signal is received in step S5103, the third signal is transmitted in step S5104, the fifth signal is transmitted in step S5105, and the fourth signal is received in step S5106.

For theSecond node N02The first signal is transmitted in step S5201, the third signal is transmitted in step S5202, and the fourth signal is transmitted in step S5203.

ForThird node N03The first signaling is transmitted in step S5301, the second signal is transmitted in step S5302, and the fifth signal is received in step S5303.

In embodiment 5, the measurement result for the first signal and the measurement result for the second signal are used in common to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node U01 to establish a connection with the third node N03; the fourth signal is used to determine whether a connection was successfully established between the first node U01 and the second node N02; the fourth signal comprises an identification of the first node U01 and resources allocated to the first node U01; receiving a first signaling; the first signaling is used to enable cell handover based on the first condition and the second condition; transmitting a fifth signal when the first condition is satisfied; the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference between the transmission time of the fifth signal and the transmission time of the third signal is equal to a first time length.

As an embodiment, the first signal is a physical layer signal.

As an embodiment, the first Signal is a Reference Signal (RS).

For one embodiment, the second signal is a physical layer signal.

As an embodiment, the second Signal is a Reference Signal (RS).

As an embodiment, the third signal is a Random Access (RA) signal.

As a sub-embodiment of this embodiment, the first sub-signal comprises a Preamble sequence (Preamble).

As a sub-embodiment of this embodiment, the second sub-signal includes one of a Connection Re-establishment Request (Connection Re-establishment Request) message, an RRC Handover Confirm (RRC Handover Confirm) message, and a Buffer Status Report (BSR) message.

As an embodiment, the fourth signal is a higher layer signal.

As an embodiment, the fourth signal is an RRC signal.

As an embodiment, the fourth signal includes all or part of an RRC message.

As an embodiment, the fourth signal is a MAC (Medium Access Control) layer signal.

As an embodiment, the fourth signal includes all or part of a MAC CE (Control Element).

As an embodiment, the fourth signal comprises all or part of a MAC TAC (Timing Advance Command).

As an embodiment, the fourth signal includes all or part of a MAC RAR (Random Access Response).

As an embodiment, the fourth signal is used to perform a second step of a two-step random access procedure.

As an embodiment, the fourth signal and the third signal are used together to perform a two-step random access (2-step RACH).

As an embodiment, the fourth signal and the third signal are used for random access for the third node N03.

As an embodiment, the fourth signal comprises a Message B (Message B, MsgB).

As an embodiment, the fourth signal comprises Message 2(Message 2, Msg 2); wherein, the message 2 is a message corresponding to the second step of the four-step random access.

As an embodiment, the fourth signal includes a Random Access Response (RAR) message.

As an embodiment, the fourth signal comprises a random access preamble identifier (RA-preamble identifier).

For one embodiment, the fourth signal includes Timing information.

As one embodiment, the fourth signal includes initial uplink Grant (UL Grant) information.

As an embodiment, the fourth signal includes a user identity (UE Identifier).

For one embodiment, the fourth signal comprises a Contention Resolution (Contention Resolution) message.

As an embodiment, the fourth signal comprises a Fallback Indication (Fallback Indication) message.

As a sub-embodiment of this embodiment, when the fourth signal received by the first node U01 includes a back-off indication, the first node U01 sends Msg3 and performs a four-step random access (4-step RACH).

As an embodiment, the fifth signal is a higher layer signal.

As an embodiment, the fifth signal is an RRC layer signal.

As an embodiment, the fifth signal includes all or part of an RRC message.

As an embodiment, the fifth signal is used to send a measurement report message to the source base station.

As an embodiment, the fifth signal is used to send a cell handover message to a source base station.

As an embodiment, the fifth signal is used to send a cell selection message to the source base station.

As an embodiment, the receiver of the fifth signal is the third node N03;

as an embodiment, the sentence that the fifth signal and the measurement for the first signal and the measurement for the second signal relate to each comprise the following meanings: the fifth signal includes a measurement for the first signal and a measurement for the second signal.

As an embodiment, the sentence that the fifth signal and the measurement for the first signal and the measurement for the second signal are related comprises the following meaning: the fifth signal comprises a decision made for a measurement of the first signal and for a measurement of the second signal.

As an embodiment, the fifth signal includes all or part of a Measurement Report (Measurement Report) Message (Message).

As an embodiment, the fifth signal includes all or part of MeasResults IE (Information Element).

As an embodiment, the fifth signal relates to a reportQuantity IE; wherein the reportQuantity is used to determine the measurement quantity configured by the third node N03 to the first node U01.

As a sub-embodiment of this embodiment, the measurement quantity comprises RSRP.

As a sub-embodiment of this embodiment, the measurement quantity comprises RSRQ.

As a sub-embodiment of this embodiment, the measurement quantity includes SINR.

As a sub-embodiment of this embodiment, the measurement quantity comprises RSSI.

As a sub-embodiment of this embodiment, the measurement quantity comprises CRI.

As an embodiment, the first signaling is a higher layer signaling.

As an embodiment, the first signaling is an RRC layer signaling.

As an embodiment, the first signaling is an IE of an RRC message.

As an embodiment, the first signaling is a MAC layer signaling.

As an embodiment, the first signaling is a part of a field in one MAC CE.

As an embodiment, the first signaling is used to indicate whether the first node U01 performs a cell handover based on the first condition and the second condition.

As an embodiment, the first signaling is further used to Disable (Disable) cell handover based on the first condition and the second condition.

As an embodiment, the first signaling comprises 1 bit; wherein 1 represents enabling cell handover based on the first condition and the second condition; 0 represents disabling of cell handover based on the first condition and the second condition.

As an embodiment, the first node U01 may perform cell handover according to the first condition and the second condition when cell handover based on the first condition and the second condition is enabled.

As one embodiment, the enabling means turning on.

As an example, the enabling means using.

As an example, the enabling means enable.

As a sub-embodiment of this embodiment, the first threshold is configurable.

As a sub-embodiment of this embodiment, the second threshold is configurable.

As a sub-embodiment of this embodiment, the first threshold value is different from the second threshold value.

As an embodiment, the second condition includes that the second node N02 is a TN base station, and the third node N03 is an NTN base station.

For one embodiment, the second condition includes the first node U01 not including the second node N02 in its list of alternatives.

For one embodiment, the second condition includes the target latency of the first node U01 being below a first latency threshold.

As a sub-embodiment of this embodiment, the first latency threshold is configurable.

For one embodiment, the first length of time is configurable.

As one embodiment, the first length of time is a fixed size.

As one embodiment, the unit of the first length of time is milliseconds (ms).

As an embodiment, the first length of time is less than a Timing Advance (TA).

As an embodiment, the first length of time is equal to N Timing Advance values (TA).

As a sub-embodiment of this embodiment, said N is a positive integer.

As a sub-embodiment of this embodiment, the N is a non-negative number.

As a sub-embodiment of this embodiment, the N is configurable.

As a sub-embodiment of this embodiment, the N is a fixed size.

As a sub-embodiment of this embodiment, the timing advance value is related to the second node N02.

As a sub-embodiment of this embodiment, the timing advance value is related to the third node N03.

As an embodiment, when the first length of time is equal to zero, the fifth signal is transmitted simultaneously with the third signal.

As an embodiment, when the first length of time is not equal to zero, the fifth signal is not transmitted simultaneously with the third signal N03.

For one embodiment, the cell handover refers to the handover of the first node U01 from the third node N03 to the first node U01.

As an embodiment, the cell handover means that the first node U01 disconnects RRC connection with the third node N03 first and then establishes RRC connection with the second node N02.

As an embodiment, the cell handover refers to the first node U01 establishing an RRC connection with the second node N02 while maintaining the RRC connection with the third node N03.

For an embodiment, the cell handover refers to the first node U01 establishing a control plane connection with the second node N02.

For one embodiment, the cell handover refers to the first node U01 establishing a user plane connection with the second node N02.

As one embodiment, dashed box F1 exists.

As one example, dashed box F1 is not present.

Example 6

Embodiment 6 illustrates a schematic diagram in which the quality of service of the first node is used to determine the second condition according to an embodiment of the present application.

In embodiment 6, the second condition relates to a Quality of Service (QoS) of the first node; the quality of service is related to the reception performance of the first node.

As an embodiment, the quality of service includes a Target Delay (Target Delay) of the first node.

As one embodiment, the second condition is satisfied when the target latency of the first node is below a first latency threshold.

As a sub-embodiment of this embodiment, the first delay threshold is preconfigured.

As a sub-embodiment of this embodiment, the first delay threshold is configured by the sender of the second signal to the first node.

As a sub-embodiment of this embodiment, the first latency threshold is a fixed size.

For one embodiment, the quality of service includes a target Reliability (Reliability) indicator of the first node.

As an example, the target reliability is related to a Bit Error Rate (BER) of the first node.

As an example, the target reliability is related to a Block Error Rate (BLER) of the first node.

As one embodiment, the second condition is satisfied when a target reliability indicator of the first node is above a first reliability threshold.

As an embodiment, the second condition is not satisfied when the target reliability indicator of the first node is not above the first reliability threshold.

As a sub-embodiment of this embodiment, the first reliability threshold is configurable.

As a sub-embodiment of this embodiment, the first reliability threshold is preconfigured.

As a sub-embodiment of this embodiment, the first reliability threshold is a fixed size.

As a sub-embodiment of this embodiment, the first reliability threshold is configured by a sender of the second signal to the first node.

As an embodiment, the quality of service is related to the type of traffic.

As an embodiment, when the traffic type of the first node is URLLC (Ultra High Reliable Low Delay Communication), the first node determines that the second condition is satisfied.

As an embodiment, when the traffic type of the first node is FTP (File Transfer Protocol), the first node determines that the second condition is not satisfied.

As an embodiment, when the traffic type of the first node has a high requirement on delay, the first node determines that the second condition is satisfied.

Example 7

Embodiment 7 illustrates an example in which the first parameter and the second parameter are used together to determine the second condition according to an embodiment of the present application.

In embodiment 7, the sender of the first signal corresponds to a first parameter, the sender of the second signal corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

As an embodiment, the sentence first parameter and second parameter are used together to determine the second condition comprises that the second condition relates to the first parameter and the second parameter.

As an embodiment, the first parameter relates to a base station type of a sender of the first signal, and the second parameter relates to a base station type of a sender of the second signal.

As a sub-embodiment of this embodiment, the type of base station of the sender of the first signal is different from the type of base station of the sender of the second signal.

As a sub-embodiment of this embodiment, the base station type includes an NTN (Non-Terrestrial Network) base station.

As a sub-embodiment of this embodiment, the NTN base station includes one of a GEO (Geostationary Earth Orbit) satellite, a MEO (Medium Earth Orbit) satellite, a LEO (Low Earth Orbit) satellite, a HEO (high elliptic Orbit) satellite, and an Airborne Platform.

As a sub-embodiment of this embodiment, the base station type includes a TN (Terrestrial Network) base station.

As a sub-embodiment of the embodiment, the TN Base Station includes one of a Cellular Base Station (Cellular Base Station), a Micro Cell Base Station (Micro Cell), a Pico Cell Base Station (Pico Cell), a home Base Station (Femtocell), an eNB, and a gNB.

As a sub-embodiment of this embodiment, the first parameter is used to determine that the sender of the first signal is a TN base station, the second parameter is used to determine that the sender of the second signal is an NTN base station, and the first node determines that the second condition is satisfied.

As an embodiment, the first parameter is used to determine a PLMN (Public Land Mobile Network) of the sender of the first signal, and the second parameter is used to determine a PLMN of the sender of the second signal.

As a sub-embodiment of this embodiment, the PLMN of the sender of the first signal belongs to a first PLMN set, the PLMN of the sender of the first signal belongs to a second PLMN set, the first PLMN set and the second PLMN set are different, and the first node determines that the second condition is satisfied.

As an additional embodiment of this sub-embodiment, the first PLMN set is allocated to TN cells and the first PLMN set is allocated to NTN cells.

As an additional embodiment of this sub-embodiment, the first PLMN set is allocated to NTN cells and the first PLMN set is allocated to TN cells.

As an embodiment, the first parameter relates to the altitude of the sender of the first signal and the second parameter relates to the altitude of the sender of the second signal.

As a sub-embodiment of this embodiment, the height of the sender of the first signal is different from the height of the sender of the second signal.

As a sub-embodiment of this embodiment, the height is related to altitude.

As a sub-embodiment of this embodiment, the altitude is obtained by the first node through a GNSS (Global Navigation Satellite System).

As a sub-embodiment of this embodiment, the altitude is notified to the first node by a base station.

As a sub-embodiment of this embodiment, the first parameter is used to determine that the altitude of the sender of the first signal is below a first altitude threshold, the second parameter is used to determine that the altitude of the sender of the second signal is above a second altitude threshold, and the first node determines that the second condition is met.

As an additional embodiment of this sub-embodiment, the first height threshold is configurable.

As an additional embodiment of this sub-embodiment, the first height threshold is preconfigured.

As an additional embodiment of this sub-embodiment, the first height threshold is a fixed size.

As an additional embodiment of this sub-embodiment, the second height threshold is configurable.

As an additional embodiment of this sub-embodiment, the second height threshold is preconfigured.

As an additional embodiment of this sub-embodiment, the second height threshold is a fixed size.

As one embodiment, the first parameter relates to a Timing Advance (TA) of the first node to a sender of the first signal, and the second parameter relates to a Timing Advance of the first node to a sender of the second signal.

As a sub-embodiment of this embodiment, the timing advance from the first node to the sender of the first signal is different from the timing advance from the first node to the sender of the second signal.

As a sub-embodiment of this embodiment, the timing advance is related to a distance from the first node to a base station.

As a sub-embodiment of this embodiment, the timing advance is related to a transmission delay from the first node to a base station.

As a sub-embodiment of this embodiment, the first parameter is used to determine that the timing advance from the first node to the sender of the first signal is less than a first time threshold, the second parameter is used to determine that the timing advance from the first node to the sender of the first signal is greater than a second time threshold, and the first node determines that the second condition is met.

As an additional embodiment of this sub-embodiment, the first time threshold is configurable.

As an additional embodiment of this sub-embodiment, the first time threshold is pre-configured.

As an additional embodiment of this sub-embodiment, the first time threshold is of a fixed size.

As an additional embodiment of this sub-embodiment, the second time threshold is configurable.

As an additional embodiment of this sub-embodiment, the second time threshold is pre-configured.

As an additional embodiment of this sub-embodiment, the second time threshold is of a fixed size.

Example 8

Embodiment 8 illustrates a schematic diagram of an alternative node list according to an embodiment of the present application, as shown in fig. 8. In fig. 8, the candidate node list includes N candidate nodes; the first column represents the alternative node sequence numbers of the N alternative nodes; the second column represents the candidate node identifications of the N candidate nodes; the third column represents the candidate node states of the N candidate nodes; and N is a positive integer.

In embodiment 8, the second condition relates to whether the sender of the first signal is included in the list of candidate nodes of the first node.

As an embodiment, the candidate node # n is identified by a candidate node identification # n; wherein N is a positive integer greater than 1 and not greater than N.

As an embodiment, the candidate node identification # n is used to uniquely identify (Identity) a Cell (Cell).

As an embodiment, the candidate node identification # n includes a Physical Cell Identifier (PCI).

As an embodiment, the candidate node Identifier # n includes an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) ECGI (Cell Global Identifier).

As an embodiment, the candidate node list further includes state information of the corresponding candidate node.

As a sub-embodiment of this embodiment, the state information comprises a load of the alternative node.

As a sub-embodiment of this embodiment, the status information is used to indicate whether the alternative node can be used for handover.

As a sub-embodiment of this embodiment, the status information is used to indicate whether the alternative node may initiate a procedure to a target cell via X2 interface signaling.

As a sub-embodiment of this embodiment, the status information is used to indicate whether the candidate node can be removed from the list of candidate nodes.

As an embodiment, the list of candidate nodes is configured through RRC (Radio Resource Control) signaling.

As an embodiment, the list of alternative nodes is configured by the sender of the second signal to the first node.

As an embodiment, the list of candidate nodes is obtained by performing measurement by the first node.

As an embodiment, the List of alternative nodes includes a Neighbor Cell List (NCL).

As an embodiment, the list of candidate nodes includes a list of candidate cells for Conditional Handover (CHO).

As an embodiment, the second condition is not satisfied when a sender of the first signal is included in the list of candidate nodes.

As a sub-embodiment of this embodiment, the phrase that the sender of the list of alternative nodes that includes the first signal includes the following meanings: one of the candidate node identifications in the list of candidate nodes is the same as the identification of the sender of the first signal.

As a sub-embodiment of this embodiment, the phrase that the sender of the list of alternative nodes that includes the first signal includes the following meanings: the sender of the first signal is a new node to the first node.

As a sub-embodiment of this embodiment, the phrase that the sender of the list of alternative nodes who includes the first signal includes the following meaning: the sender of the first signal is a node that has performed measurement reporting by the first node.

As a sub-embodiment of this embodiment, when the sender of the first signal is included in the candidate node list, the first node may perform a conventional cell handover.

As an embodiment, the second condition is satisfied when the sender of the first signal is not included in the list of candidate nodes.

As a sub-embodiment of this embodiment, the phrase a sender in the list of alternative nodes that does not include the first signal includes the following meaning: any one of the candidate node identifications in the list of candidate nodes is different from the identification of the sender of the first signal.

Example 9

Embodiment 9 illustrates a schematic diagram of a trigger condition of a third signal according to an embodiment of the present application, as shown in fig. 9. In fig. 9, a dotted ellipse represents a coverage of the NTN base station, a solid ellipse represents a coverage of the TN base station, T1 and T2 represent different timings, a dotted arrow double-headed arrow represents connection between the UE and the NTN base station, a solid double-headed arrow represents the UE transmitting a signal to the TN base station, and a solid single-headed arrow represents a moving direction of the UE.

In embodiment 9, at time T1, when a UE is in the coverage of an NTN base station and a maintaining base station of the UE is an NTN base station, the UE enters the coverage of a TN base station at time T2 as the UE moves, the TN base station is detected, and measurements are performed for the NTN base station and the TN base station. The RSRP measured by the UE to the NTN base station is smaller than a first threshold, the RSRP measured by the UE to the TN base station is larger than a second threshold, and a first condition is met; the source base station is an NTN base station, the target base station is a TN base station, and the TN base station is not in the alternative neighbor list, and the second condition is met. The UE satisfies the first condition and the second condition at the same time, may perform handover based on the first condition and the second condition, and may send a random access request message to the TN base station while maintaining RRC connection with the NTN base station.

As an embodiment, the source base station corresponds to a first node of the present application.

As an embodiment, the target base station corresponds to a second node of the present application.

As an embodiment, the random access request message corresponds to a third signal of the present application.

As an embodiment, the random access request message is used to establish a connection with the TN base station.

As an embodiment, the random access request message is used to initiate a random access procedure.

As an embodiment, the random access request message is used to initiate a four-step random access procedure.

As an embodiment, the random access request message is used to initiate a two-step random access procedure.

As an embodiment, the random access request message is used to initiate a cell handover procedure.

As an embodiment, the random access request message is used to initiate a cell selection procedure.

In one embodiment, the random access request message includes a random access Preamble (Preamble).

As one embodiment, the random access request message includes a random access preamble and a Payload (Payload).

Example 10

Embodiment 10 illustrates a schematic diagram in which first signaling is used to enable cell handover based on a first condition and a second condition according to an embodiment of the present application, as shown in fig. 10. In fig. 10, each block represents a step, and it is specifically noted that the sequence in this example does not limit the signal transmission sequence and the implementation sequence in this application.

In embodiment 10, the first signaling is used to indicate to turn on or off cell handover based on a first condition and a second condition; the first node receives and interprets the first signaling in step 1001, and if the first signaling decoded in step 1002 indicates that cell handover based on the first condition and the second condition is enabled, the first node performs cell handover based on the first condition and the second condition in step 1003; if the first signaling decoded in step 1004 indicates that the cell handover based on the first condition and the second condition is disabled, the first node performs a normal cell handover in step 1005.

As an embodiment, the first signaling is a higher layer signaling.

As an embodiment, the first signaling is a RRC (Radio Resource Control) message.

As an embodiment, the first signaling is a MAC (Medium Access Control) CE (Control Element).

As an embodiment, the first signaling is a field in a MAC CE.

As an embodiment, the first signaling is all or part of a Measurement Configuration (Measurement Configuration) message.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may perform cell handover while maintaining RRC connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may perform cell handover while maintaining a control plane connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may perform cell handover while maintaining a user plane connection with a source base station.

As an embodiment, when Cell handover based on the first condition and the second condition is enabled, the first node may perform Cell Selection (Cell Selection) or Cell Reselection (Cell Reselection) while maintaining an RRC connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may perform cell selection or cell reselection while maintaining a control plane connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may perform cell handover or cell reselection while maintaining a user plane connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may initiate a random access procedure for a target base station while maintaining an RRC connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may initiate a random access procedure for a target base station while maintaining a control plane connection with a source base station.

As an embodiment, when cell handover based on the first condition and the second condition is enabled, the first node may initiate a random access procedure for a target base station while maintaining a user plane connection with a source base station.

As an embodiment, the conventional cell Handover includes a Handover (Handover) procedure in an RRC _ connected state.

As an example, the conventional cell Handover includes a Hard Handover (Hard Handover) procedure.

As an example, the conventional cell Handover includes a Soft Handover (Soft Handover) procedure.

As an embodiment, the conventional cell handover includes a Make Before Break (Make Before Break) handover procedure.

As an embodiment, the conventional cell handover includes handover performed under the control of a source base station.

As one embodiment, the conventional cell Handover includes Conditional Handover (CHO).

Example 11

Embodiment 11 illustrates a schematic diagram of a first length of time according to an embodiment of the present application, as shown in fig. 11. In fig. 11, the horizontal axis represents time, the vertical axis represents frequency, boxes filled with diagonal lines represent time-frequency resources occupied by the third signal, and boxes filled with diamond-shaped grids represent time-frequency resources occupied by the fifth signal, the third signal and the fifth signal.

In embodiment 11, the difference in the transmission time instants of the fifth signal and the third signal is equal to a first time length; the first length of time is configurable; a recipient of the third signal is different from a recipient of the fifth signal.

As an embodiment, the third signal and the fifth signal are transmitted to different base stations.

As an embodiment, the third signal and the fifth signal are different signals.

As an embodiment, the third signal and the fifth signal are transmitted on different frequency resources.

As an example, the center frequency of the third signal is f 2.

As an example, the center frequency of the fifth signal is f 1.

As an embodiment, the transmission time of the fifth signal is the same as the transmission time of the third signal.

As an embodiment, the fifth signal and the third signal are transmitted at different time instants.

As an embodiment, the fifth signal is earlier than a transmission timing of the third signal.

As an embodiment, the fifth signal is later than a transmission timing of the third signal.

For one embodiment, the first length of time is configurable.

As one embodiment, the first length of time is preconfigured.

As one embodiment, the first length of time is a fixed length of time.

As one embodiment, the unit of the first length of time is milliseconds (ms).

For one embodiment, the first length of time is less than a Timing Advance (TA).

For one embodiment, the first length of time is equal to N Timing Advance (TA).

As a sub-embodiment of this embodiment, said N is a positive integer.

As a sub-embodiment of this embodiment, the N is a non-negative number.

As a sub-embodiment of this embodiment, the N is configurable.

As a sub-embodiment of this embodiment, the N is a fixed size.

As a sub-embodiment of this embodiment, the timing advance value is related to a sender of the first signal.

As a sub-embodiment of this embodiment, the timing advance value is related to a sender of the second signal.

As an embodiment, when the first length of time is not equal to zero, the fifth signal is not transmitted simultaneously with the third signal.

Example 12

Embodiment 12 illustrates a block diagram of a processing apparatus for use in a first node according to an embodiment of the present application; as shown in fig. 12. In fig. 12, the processing means 1200 in the first node comprises a first receiver 1201, a first transmitter 1202.

A first receiver 1201 receiving a first signal and a second signal;

a first transmitter 1202 that transmits a third signal when both the first condition and the second condition are satisfied;

in embodiment 12, the measurement result for the first signal and the measurement result for the second signal are used in common to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal.

For one embodiment, the first receiver 1201 receives a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between the first node and a sender of the first signal; the fourth signal includes an identification of the first node and a resource allocated to the first node.

As an embodiment, the second condition relates to whether a sender of the first signal is included in a list of candidate nodes for the first node.

As an embodiment, the sender of the first signal corresponds to a first parameter, the sender of the second signal corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

As an embodiment, the second condition relates to a quality of service of the first node.

As an embodiment, the first receiver 1201 receives a first signaling; the first signaling is used to enable cell handover based on the first condition and the second condition.

As an example, when the first condition is satisfied, the first transmitter 1202 transmits a fifth signal; wherein the fifth signal relates to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the first length of time is configurable.

For one embodiment, the first receiver 1201 includes the antenna 452, the receiver 454, the multiple antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, and the data source 467 of fig. 4.

For one embodiment, the first receiver 1201 includes the antenna 452, the receiver 454, the multi-antenna receive processor 458, and the receive processor 456 of fig. 4.

For one embodiment, the first receiver 1201 includes the antenna 452, the receiver 454, and the receive processor 456 of fig. 4.

For one embodiment, the first transmitter 1202 includes an antenna 452, a transmitter 454, a multi-antenna transmit processor 457, a transmit processor 468, a controller/processor 459, a memory 460, and a data source 467 of fig. 4.

For one embodiment, the first transmitter 1202 includes the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, and the transmit processor 468 of fig. 4.

For one embodiment, the first transmitter 1202 includes the antenna 452, the transmitter 454, and the transmit processor 468 of fig. 4.

Example 13

Embodiment 13 illustrates a block diagram of a processing apparatus for use in a second node according to an embodiment of the present application; as shown in fig. 13. In fig. 13, the processing means 1300 in the second node comprises a second transmitter 1301 and a second receiver 1302.

A second transmitter 1301 which transmits the first signal;

a second receiver 1302 for receiving a third signal when both the first condition and the second condition are satisfied;

in embodiment 13, the measurement result for the first signal and the measurement result for the second signal are used in common to determine whether the first condition is satisfied; the second signal is transmitted by a maintaining base station of a serving cell of a recipient of the first signal; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by a recipient of the first signal to establish a connection with the second node.

For one embodiment, the second transmitter 1301 transmits a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between the recipient of the first signal and the second node; the fourth signal includes an identification of a recipient of the first signal and a resource allocated to the recipient of the first signal.

As an embodiment, the second condition relates to whether the second node is included in a list of candidate nodes of the recipient of the first signal.

As an embodiment, the second node corresponds to a first parameter, the sender of the second signal corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

As an embodiment, the second condition relates to a traffic type of a recipient of the first signal.

As an embodiment, the first signaling is sent by a sender of the second signal; the first signaling is used to enable cell handover based on the first condition and the second condition.

As an embodiment, the sender of the second signal receives a fifth signal when the first condition is satisfied; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; a recipient of the third signal is different from a recipient of the fifth signal.

The second transmitter 1301, for one embodiment, includes the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475, and the memory 476 of fig. 4.

The second transmitter 1301 includes the antenna 420, the transmitter 418, the multi-antenna transmission processor 471 and the transmission processor 416 in fig. 4 of the present application, as an example.

The second transmitter 1301 includes the antenna 420, the transmitter 418, and the transmission processor 416 in fig. 4 of the present application, as an example.

For one embodiment, the second receiver 1302 includes the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller/processor 475, and the memory 476 of fig. 4.

For one embodiment, the second receiver 1302 includes the antenna 420, the receiver 418, the multi-antenna receive processor 472, and the receive processor 470 shown in fig. 4.

For one embodiment, the second receiver 1302 includes the antenna 420, the receiver 418, and the receive processor 470 shown in fig. 4.

Example 14

Embodiment 14 illustrates a block diagram of a processing apparatus for use in a third node according to an embodiment of the present application; as shown in fig. 14. In fig. 14, the processing means 1400 in the third node comprises a third transmitter 1401 and a third receiver 1402.

A third transmitter 1401 for transmitting the second signal and the first signal;

in embodiment 14, the first signaling is used to enable cell handover based on a first condition and a second condition; the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the first signal is transmitted by a neighbor node of the third node; the second condition is independent of measurements for the first signal, and the second condition is independent of measurements for the second signal.

As an embodiment, the third signal is received by the sender of the first signal when both the first condition and the second condition are satisfied; the third signal is used by a receiver of the second signal to establish a connection with a sender of the first signal.

As an embodiment, the second condition relates to whether the sender of the first signal is included in a list of alternative nodes for the receiver of the second signal.

As an embodiment, the sender of the first signal corresponds to a first parameter, the third node corresponds to a second parameter, and the second condition is related to the first parameter and the second parameter.

As an embodiment, the second condition relates to a quality of service of a recipient of the second signal.

As an embodiment, a recipient of the second signal receives a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between a recipient of the second signal and a sender of the first signal; the fourth signal includes an identification of a recipient of the second signal and a resource allocated to the recipient of the second signal.

For one embodiment, third receiver 1402 receives a fifth signal when the first condition is satisfied; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the first length of time is configurable.

The third transmitter 1401, for one embodiment, includes the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, the controller/processor 475, and the memory 476 of fig. 4 of the present application.

The third transmitter 1401 includes, as an embodiment, the antenna 420, the transmitter 418, the multi-antenna transmission processor 471 and the transmission processor 416 in fig. 4 of the present application.

The third transmitter 1401 includes the antenna 420, the transmitter 418, and the transmission processor 416 in fig. 4 of the present application as an example.

For one embodiment, the third receiver 1402 includes the antenna 420, the receiver 418, the multiple antenna receive processor 472, the receive processor 470, the controller/processor 475, and the memory 476 of fig. 4.

For one embodiment, the third receiver 1402 includes the antenna 420, the receiver 418, the multi-antenna receive processor 472, and the receive processor 470 shown in fig. 4.

The third receiver 1402 includes the antenna 420, the receiver 418, and the receive processor 470 shown in fig. 4 of the present application, as an example.

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. User equipment, terminal and UE in this application include but not limited to unmanned aerial vehicle, Communication module on the unmanned aerial vehicle, remote control aircraft, the aircraft, small aircraft, the cell-phone, the panel computer, the notebook, vehicle Communication equipment, wireless sensor, the network card, thing networking terminal, the RFID terminal, NB-IOT terminal, MTC (Machine Type Communication) terminal, EMTC (enhanced MTC) terminal, the data card, the network card, vehicle Communication equipment, low-cost cell-phone, wireless Communication equipment such as low-cost panel computer. The base station or the system device 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, a gNB (NR node B) NR node B, a TRP (Transmitter Receiver Point), 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 configured for wireless communication, comprising:

a first receiver receiving a first signal and a second signal;

wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by the first node to establish a connection with a sender of the first signal; the third signal comprises a first sub-signal and a second sub-signal, the first sub-signal comprises a preamble sequence, and the second sub-signal comprises an RRC connection re-establishment request message; the sender of the second signal is a maintaining base station of a serving cell of the first node.

2. The first node of claim 1, wherein the first receiver receives a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between the first node and a sender of the first signal; the fourth signal includes an identification of the first node and a resource allocated to the first node.

3. The first node according to claim 1 or 2, characterized in that the second condition relates to whether the sender of the first signal is included in the list of alternative nodes of the first node.

4. The first node of any of claims 1-3, wherein the sender of the first signal corresponds to a first parameter and the sender of the second signal corresponds to a second parameter, and wherein the second condition relates to the first parameter and the second parameter.

5. The first node according to any of claims 1-4, wherein the second condition relates to a quality of service of the first node.

6. The first node according to any of claims 1-5, characterized in that the first transmitter transmits a fifth signal when the first condition is fulfilled; wherein the fifth signal relates to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the first length of time is configurable.

7. A second node configured for wireless communication, comprising:

a second transmitter that transmits the first signal;

wherein the measurement for the first signal and the measurement for the second signal are used together to determine whether the first condition is satisfied; the second signal is transmitted by a maintaining base station of a serving cell of a recipient of the first signal; the second condition is independent of measurements for the first signal and the second condition is independent of measurements for the second signal; the third signal is used by a recipient of the first signal to establish a connection with the second node; the third signal includes a first sub-signal including a preamble sequence and a second sub-signal including an RRC connection re-establishment request message.

8. The second node of claim 7, wherein the second transmitter transmits a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between the recipient of the first signal and the second node; the fourth signal includes an identification of a recipient of the first signal and a resource allocated to the recipient of the first signal.

9. Second node according to claim 7 or 8, characterized in that the second condition relates to whether the second node is included in a list of alternative nodes of the recipient of the first signal.

10. Second node according to any of claims 7-9, characterized in that the second node corresponds to a first parameter and the sender of the second signal corresponds to a second parameter, the second condition being related to the first parameter and the second parameter.

11. Second node according to any of claims 7-10, characterized in that the second condition relates to a traffic type of a recipient of the first signal.

12. Second node according to any of claims 7-11, characterized in that the sender of the second signal receives a fifth signal when the first condition is fulfilled; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; a recipient of the third signal is different from a recipient of the fifth signal.

13. A method in a first node used for wireless communication, comprising:

receiving a first signal and a second signal;

14. The method in a first node according to claim 13, characterized in that according to an aspect of the application, a fourth signal is received; wherein the fourth signal is used to determine whether a connection is successfully established between the first node and a sender of the first signal; the fourth signal includes an identification of the first node and a resource allocated to the first node.

15. A method in a first node according to claim 13 or 14, characterised in that the second condition relates to whether the sender of the first signal is included in the list of alternative nodes of the first node.

16. A method in a first node according to any of claims 13-15, characterized in that the sender of the first signal corresponds to a first parameter and the sender of the second signal corresponds to a second parameter, and that the second condition relates to the first parameter and the second parameter.

17. A method in a first node according to any of claims 13-16, characterised in that the second condition relates to a traffic type of the first node.

18. A method in a first node according to any of claims 13-17, characterized in that when the first condition is fulfilled, a fifth signal is sent; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; the receiver of the fifth signal is the sender of the second signal; a recipient of the third signal is different from a recipient of the fifth signal.

19. A method in a second node used for wireless communication, comprising:

transmitting a first signal;

20. A method in a second node according to claim 19, characterized by transmitting a fourth signal; wherein the fourth signal is used to determine whether a connection is successfully established between the recipient of the first signal and the second node; the fourth signal includes an identification of a recipient of the first signal and a resource allocated to the recipient of the first signal.

21. Method in a second node according to claim 19 or 20, wherein the second condition relates to whether the second node is included in a list of alternative nodes for the recipient of the first signal.

22. A method in a second node according to any of claims 19-21, characterised in that the second node corresponds to a first parameter and the sender of the second signal corresponds to a second parameter, and that the second condition relates to the first parameter and the second parameter.

23. A method in a second node according to any of claims 19-22, characterised in that the second condition relates to a traffic type of a recipient of the first signal.

24. A method in a second node according to any of claims 19-23, characterised in that when the first condition is fulfilled, a fifth signal is received by the sender of the second signal; wherein the fifth signal is related to both the measurement for the first signal and the measurement for the second signal; the difference value of the sending time of the fifth signal and the third signal is equal to a first time length; a recipient of the third signal is different from a recipient of the fifth signal.