CN117256196A

CN117256196A - Random access method, device, equipment and storage medium

Info

Publication number: CN117256196A
Application number: CN202180097458.1A
Authority: CN
Inventors: 于新磊; 李海涛; 胡奕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2023-12-19
Also published as: WO2023004552A1

Abstract

The application provides a random access method, a device, equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: the network equipment sends first configuration information to the terminal equipment; the terminal equipment determines an uplink carrier used in a random access process based on the first configuration information, wherein the uplink carrier comprises a NUL carrier or a SUL carrier; the terminal device sends a random access request to the network device based on the uplink carrier. According to the embodiment of the invention, the terminal equipment selects the uplink carrier based on the configuration information sent by the network equipment, and initiates the random access process based on the selected uplink carrier, so that the terminal equipment is ensured to use the proper uplink carrier to initiate the random access process, and the success rate of the random access is improved.

Description

Random access method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a random access method, a device, equipment and a storage medium.

Background

The NR (New Radio), new air interface protocol supports the SUL (Supplementary Uplink ) technology. The SUL indicates a conventional carrier pair comprising UL (Uplink) and DL (Downlink), there is an associated or supplemental Uplink carrier. In other words, in a communication system supporting the SUL technology, there are two types of uplink carriers: NUL (Normal Uplink) carrier and SUL carrier.

The SUL carrier can extend uplink coverage and increase the uplink rate in the power limited region by using a low frequency carrier. Moreover, the carrier bandwidth of the NUL carrier is usually much larger than that of the SUL carrier, so that the terminal device can use the NUL carrier to obtain a higher uplink rate under the condition of better air interface quality (such as that the terminal device is closer to the network device); in the case of poor air interface quality (e.g., the terminal device is far away from the network device), the terminal device may use the SUL carrier to obtain a higher uplink rate than the NUL carrier due to the small path loss of the low frequency carrier. In addition, the uplink transmission and the downlink transmission of the TDD (Time Division Duplex ) system are divided by the time domain, and there is a clear time limit when the uplink transmission can be performed, but if the TDD carrier and the SUL carrier deployed on the symmetric spectrum are bonded, some delay sensitive data can be immediately sent through the SUL carrier without regard to the time limit of the uplink transmission, so as to achieve the effect of reducing the transmission delay.

However, further discussion and study is needed as to how the terminal device selects the appropriate uplink carrier to initiate the random access procedure.

Disclosure of Invention

The embodiment of the application provides a random access method, a device, equipment and a storage medium. The technical scheme is as follows:

in one aspect, an embodiment of the present application provides a random access method applied to a terminal device of an NTN (Non-Terrestrial Network, non-terrestrial communication network), where the method includes:

receiving first configuration information from a network device;

determining an uplink carrier used in a random access process based on the first configuration information, wherein the uplink carrier comprises a NUL carrier or a SUL carrier;

and sending a random access request to the network equipment based on the uplink carrier.

On the other hand, an embodiment of the present application provides a random access method, which is applied to network equipment of NTN, where the method includes:

transmitting first configuration information to a terminal device, wherein the first configuration information is used for determining an uplink carrier wave used in a random access process by the terminal device, and the uplink carrier wave comprises a NUL carrier wave or a SUL carrier wave;

and receiving a random access request sent by the terminal equipment through the uplink carrier.

In still another aspect, an embodiment of the present application provides a random access apparatus, provided in a terminal device of NTN, where the apparatus includes:

The information receiving module is used for receiving first configuration information from the network equipment;

the carrier determining module is configured to determine an uplink carrier used in a random access process based on the first configuration information, where the uplink carrier includes a NUL carrier or a SUL carrier;

and the random access module is used for sending a random access request to the network equipment based on the uplink carrier.

In yet another aspect, an embodiment of the present application provides a random access apparatus, provided in a network device of an NTN, where the apparatus includes:

the information sending module is used for sending first configuration information to the terminal equipment, wherein the first configuration information is used for determining an uplink carrier wave used in a random access process by the terminal equipment, and the uplink carrier wave comprises a NUL carrier wave or a SUL carrier wave;

and the random access module is used for receiving a random access request sent by the terminal equipment through the uplink carrier.

In yet another aspect, an embodiment of the present application provides a terminal device, including: a processor, and a transceiver coupled to the processor; wherein:

the transceiver is configured to receive first configuration information from a network device;

The processor is configured to determine an uplink carrier used in a random access process based on the first configuration information, where the uplink carrier includes a NUL carrier or a SUL carrier;

the transceiver is configured to send a random access request to the network device based on the uplink carrier.

In yet another aspect, an embodiment of the present application provides a network device, including: a processor, and a transceiver coupled to the processor; wherein:

the transceiver is configured to send first configuration information to a terminal device, where the first configuration information is used for the terminal device to determine an uplink carrier used in a random access process, and the uplink carrier includes a NUL carrier or a SUL carrier;

the transceiver is further configured to receive a random access request sent by the terminal device through the uplink carrier.

In yet another aspect, an embodiment of the present application provides a computer readable storage medium, where a computer program is stored, where the computer program is configured to be executed by a processor of a terminal device to implement a random access method on a terminal device side as described above.

In yet another aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored therein, where the computer program is configured to be executed by a processor of a network device to implement a random access method on a network device side as described above.

In yet another aspect, an embodiment of the present application provides a chip, where the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a terminal device, the chip is configured to implement a random access method on a terminal device side as described above.

In yet another aspect, an embodiment of the present application provides a chip, where the chip includes a programmable logic circuit and/or program instructions, and when the chip is running on a network device, the chip is configured to implement a random access method on a network device side as described above.

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:

the terminal equipment selects the uplink carrier based on the configuration information sent by the network equipment, and initiates a random access process based on the selected uplink carrier, so that the terminal equipment is ensured to use the proper uplink carrier to initiate the random access process, and the success rate of random access is improved. In addition, in the embodiment of the application, the uplink carrier used by the terminal equipment in the random access process comprises a NUL carrier or a SUL carrier, and the effect of expanding uplink coverage is achieved by associating the SUL carrier with the NUL carrier.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a network architecture provided by one embodiment of the present application;

fig. 2 is a schematic diagram of a network architecture of an NTN system according to one embodiment of the present application;

FIG. 3 is a schematic diagram of a regenerative forwarding satellite network architecture provided by one embodiment of the present application;

FIG. 4 is a schematic diagram of a transparent forwarding satellite network architecture provided by one embodiment of the present application;

fig. 5 is a schematic diagram of a network architecture of a terrestrial cellular network provided in one embodiment of the present application;

fig. 6 is a schematic diagram of a SUL carrier configuration provided in one embodiment of the present application;

fig. 7 is a schematic diagram of selection of SUL carriers and NUL carriers provided in one embodiment of the present application;

fig. 8 is a schematic diagram of a four-step random access procedure provided in one embodiment of the present application;

fig. 9 is a schematic diagram of a two-step random access procedure provided in one embodiment of the present application;

Fig. 10 is a schematic diagram of a two-step random access procedure rollback to a four-step random access procedure according to an embodiment of the present application;

FIG. 11 is a schematic diagram of the near-far effect provided by one embodiment of the present application;

fig. 12 is a flowchart of a random access method provided in one embodiment of the present application;

fig. 13 is a schematic diagram of uplink carrier selection according to an embodiment of the present application;

fig. 14 is a schematic diagram of uplink carrier selection according to another embodiment of the present application;

fig. 15 is a block diagram of a random access device provided in one embodiment of the present application;

fig. 16 is a block diagram of a random access device provided in another embodiment of the present application;

fig. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

Referring to fig. 1, a schematic diagram of a network architecture according to an embodiment of the present application is shown. The network architecture may include: a network device 10 and a terminal device 20.

The network device 10 is a device for providing wireless communication services to the terminal device 20. A connection may be established between the network device 10 and the terminal device 20 over an air interface, such that communication, including interaction of signaling and data, is performed over the connection. The number of network devices 10 may be plural, and two adjacent network devices 10 may communicate with each other by wired or wireless means. The terminal device 20 may switch between different network devices 10, i.e. establish a connection with different network devices 10.

In one example, as shown in fig. 2, the network device 10 in the NTN system may be a satellite 11, for example. One satellite 11 may cover a range of ground areas and provide wireless communication services to terminal devices 20 on the ground areas. In addition, the satellites 11 can orbit the earth, and communication coverage of different areas of the earth surface can be achieved by arranging a plurality of satellites 11.

Satellite communications have many unique advantages over terrestrial cellular network communications. First, satellite communications are not limited by the user's territory. For example, a general land communication cannot cover an area where communication equipment cannot be set up or communication is not performed due to a scarcity of population, such as ocean, mountain, desert, etc., whereas for satellite communication, each corner of the earth can be theoretically covered by satellite communication because one satellite can cover a larger ground and the satellite can orbit around the earth. And secondly, satellite communication has great social value. Satellite communication can be covered in remote mountain areas, poor and backward countries or regions with lower cost, so that people in the regions enjoy advanced voice communication and mobile internet technology, thereby being beneficial to reducing the gap between developed regions and promoting the development of the regions. Again, the satellite communication distance is far, and the communication cost is not significantly increased while the communication distance is increased. And finally, the satellite communication has high stability and is not limited by natural disasters.

Alternatively, satellites are classified into LEO (Low-Earth Orbit) satellites, MEO (Medium-Earth Orbit) satellites, GEO (Geostationary Earth Orbit, geosynchronous Orbit) satellites, HEO (High Elliptical Orbit ) satellites, and the like according to the difference in Orbit heights. LEO and GEO are the main studies at the present stage.

1、LEO。

The low orbit satellite has an altitude range of 500km (kilo-meter) to 1500km, and the corresponding orbit period is about 1.5 hours to 2 hours. The signal propagation delay for single hop communications between users is typically less than 20ms (millisecond). The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is less, and the requirement on the transmitting power of the user terminal is not high.

2、GEO。

Geosynchronous orbit satellites have an orbit height of 35786km and a period of 24 hours around the earth. The signal propagation delay for single hop communications between users is typically 250ms.

Optionally, in order to ensure coverage of the satellite and improve system capacity of the whole satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form tens or hundreds of beams to cover the ground; a satellite beam may cover a ground area of several tens to hundreds of kilometers in diameter.

Alternatively, there are two currently considered satellites, one being a regenerative repeater (Regenerative Payload) satellite, and fig. 3 shows a schematic diagram of a regenerative repeater satellite network architecture; another is a transparent forwarded (Transparent Payload) satellite, and fig. 4 shows a schematic diagram of a transparent forwarded satellite network architecture. Among them, a wireless link between a satellite and an NTN gateway (NTN gateway is usually located on the ground) is generally called a feeder link (feeder link).

In another example, as shown in fig. 5, the network device 10 in a terrestrial cellular network system may be a base station 12, for example. Base station 12 is a device deployed in an access network to provide wireless communication functionality for terminal equipment 20. The base stations 12 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. The names of network device-capable devices may vary in systems employing different radio access technologies, for example, in NR systems, called gndeb or gNB. As communication technology evolves, the name "base station" may change. For convenience of description, in the embodiment of the present application, the above-mentioned devices for providing the terminal device 20 with the wireless communication function are collectively referred to as a network device.

In addition, the terminal device 20 according to the embodiment of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), mobile Station (MS), terminal devices (terminal devices), and the like. For convenience of description, in the embodiment of the present application, the above-mentioned devices are collectively referred to as a terminal device.

In addition, in the embodiments of the present application, the terms "network" and "system" are commonly used in combination, but those skilled in the art will understand the meaning.

The technical scheme provided by the embodiment of the application can be applied to an NTN system and also can be applied to a ground cellular network system.

The NR protocol supports SUL technology. The SUL indicates that a conventional pair of UL and DL containing carriers will have an associated or supplemental uplink carrier, as shown in FIG. 6. In other words, in a communication system supporting the SUL technology, there are two types of uplink carriers: NUL carrier and SUL carrier. In one example, the SUL carrier and the associated serving cell carrier belong to the same TAG (Timing Advance Group ).

In a terrestrial cellular network, as shown in fig. 7, the SUL carrier can extend uplink coverage, and by using a low frequency carrier, the uplink rate of the power limited region is increased. Moreover, the carrier bandwidth of the NUL carrier is usually much larger than that of the SUL carrier, so that the terminal device can use the NUL carrier to obtain a higher uplink rate under the condition of better air interface quality (such as that the terminal device is closer to the network device); in the case of poor air interface quality (e.g., the terminal device is far away from the network device), the terminal device may use the SUL carrier to obtain a higher uplink rate than the NUL carrier due to the small path loss of the low frequency carrier. Thus, the purpose of the SUL includes obtaining an envelope of the two carrier uplink rates. At any moment, the terminal equipment can only use one uplink carrier, and the NR protocol does not allow the terminal equipment to simultaneously transmit data on the SUL carrier and the NUL carrier, so that the design of the protocol, in particular the difficulty of radio frequency implementation, is facilitated to be simplified. Exemplary, a typical application scenario of the SUL technology is to configure SUL carrier in spectrum resources of LTE (Long Term Evolution ), make full use of uplink spectrum of LTE with less traffic, obviously improve user experience of NR, and not greatly affect existing LTE. In addition, the SUL carrier can also reduce time delay, the uplink transmission and the downlink transmission of the TDD system are divided by the time domain, and when the uplink transmission can be carried out, the time limit is clear, but if the TDD carrier and the SUL carrier deployed on the symmetrical frequency spectrum are bound, some time delay sensitive data can be immediately sent through the SUL carrier without regard to the time limit of the uplink transmission, so that the effect of reducing the transmission time delay is achieved.

In one example, for transmission of PUCCH (Physical Uplink Control Channel ), the terminal device makes an explicit PUCCH transmission based on a SUL carrier or a NUL carrier based on an RRC (Radio Resource Control, radio resource configuration) signaling configuration explicit by the network device. In one example, for PUSCH (Physical Uplink Shared Channel ) transmission, the network device may configure the terminal device to transmit PUSCH on the carrier on which the PUCCH is located, or may configure the terminal device to dynamically switch over on the SUL carrier and the NUL carrier. Optionally, if dynamic handover is to be supported, the UL grant (scheduling grant) issued by the network device includes indication information (such as SUL/non-SUL indicator, SUL/non-SUL indicator) for indicating on which carrier the scheduled PUSCH is transmitted. The terminal device does not transmit PUSCH on both the SUL carrier and the NUL carrier. In one example, for the random access procedure, the terminal device selects a NUL carrier or a SUL carrier based on a network device configured RSRP (Reference Signal Receiving Power, reference signal received power) threshold (RSRP-threshold ssb-SUL). In one example, if a MAC (Media Access Control, medium access control) entity of a terminal device receives a UL grant indicating carrier switching while a random access procedure is in progress, the MAC entity should ignore the UL grant.

In one example, the four-step random access procedure is triggered by any one of the following events: the method comprises the steps of establishing wireless connection when the UE is initially accessed: the UE goes from rrc_idle state to rrc_connected state; RRC connection reestablishment procedure: so that the UE reestablishes the wireless connection after the wireless link fails; cell handover: the UE needs to establish uplink synchronization with a new serving cell; under the RRC_CONNECTED state, DL (Downlink) data arrives, and at the moment, UL is in an out-of-step state; in the rrc_connected state, UL data arrives while UL is in an out-of-sync state or there is no PUCCH resource for transmitting SR (Scheduling Request ); SR failure; a synchronous reconfiguration request from RRC; the UE transitions from an rrc_inactive (RRC active) state to an rrc_connected state; establishing time calibration in the SCell (Secondary Cell) addition process; request other SI (System Information ); beam failure recovery.

In Rel 15 (Release 15 ), the four-step random access procedure mainly supports the following two random access modes: the contention-based random access scheme and the non-contention-based random access scheme are shown in fig. 8. The following is described in connection with the random access procedure shown in fig. 8:

Step 1, the terminal device sends Msg1 (Message 1 ) to the network device.

The terminal device selects PRACH (Physical Random Access Channel ) resources and transmits the selected random access preamble on the selected PRACH (Random Access Preamble).

If the random access mode is based on non-contention, the PRACH resource and preamble may be specified by the network device (step 0). The network device may estimate the uplink Timing based on the preamble, and the grant size required for the terminal device to transmit Msg3 (Message 3 ).

Step 2, the network device sends Msg2 (Message 2 ) to the terminal device.

After the terminal device sends Msg1, a Random Access response time window (RA-response window) is opened, and a PDCCH (Physical Downlink Control Channel ) scrambled by RA-RNTI (Random Access-Radio Network Temporary Identifier, random Access radio network temporary identifier) is monitored in the Random Access response time window. The RA-RNTI relates to PRACH time-frequency resources used by the terminal device to transmit Msg 1.

After successfully receiving the RA-RNTI scrambled PDCCH, the terminal device can obtain the PDSCH (Physical Downlink Shared Channel ) scheduled by the PDCCH, which includes the RAR (Random Access Response ). If the terminal device receives the PDCCH scrambled by the RA-RNTI and the RAR includes the preamble index (indication) sent by itself, the terminal device considers that the random access response is successfully received.

For the random access mode based on non-competition, after the terminal equipment successfully receives the Msg2, the random access process is ended.

For the contention-based random access mode, after the terminal equipment terminal successfully receives the Msg2, it is further required to continue to transmit the Msg3 and receive the Msg4 (Message 4 ).

And 3, the terminal equipment sends Msg3 to the network equipment.

The terminal device transmits Msg3 on the resources scheduled by the network device. Msg3 is mainly used to inform the network device what event the random access procedure is triggered by. For example, if it is an initial access random procedure, the Msg3 will carry UE ID (Identifier) and establishment cause (establishment cause); in the case of RRC reestablishment, the Msg3 would carry the connected UE identity and establishment cause.

And step 4, the network equipment sends Msg4 to the terminal equipment.

Msg4 has two roles, one is for contention conflict resolution, and the other is for the network device to transmit RRC configuration messages to the terminal device. Optionally, there are two ways to resolve the contention conflict: one is the PDCCH schedule with C-RNTI scrambling for Msg4 if the terminal device carries a C-RNTI (Cell Radio Network Temporary Identifier ) in Msg 3; another is PDCCH scheduling, which is scrambled with TC-RNTI (Temporary Cell Radio Network Temporary Identifier ) by Msg4 if the terminal device does not carry a C-RNTI in Msg3, e.g. initial access.

In Rel 16 (Release 16, release 16 version 16), a two-step random access procedure is introduced. The introduction of the two-step random access procedure can reduce signaling overhead while reducing latency. As shown in fig. 9, msgA (Message a) in the two-step random access includes a Preamble transmitted on PRACH and load information transmitted on PUSCH; after the MsgA transmission, the terminal equipment monitors the response of the network equipment in a configured window; if the MsgB (Message B) issued by the network device is received and the MsgB contains an indication that the contention conflict resolution is successful, the terminal device ends the random access procedure. Alternatively, as shown in fig. 10, if a back-off indication is received in the MsgB, the terminal device performs transmission of Msg3 and listens for the contention conflict resolution result. In one example, if contention conflict resolution is unsuccessful after the Msg3 transmission, the terminal device continues transmission of MsgA.

In a terrestrial cellular network, as shown in fig. 11 (a), the RSRP of a terminal device in the center of a cell is significantly higher than the RSRP of the terminal device at the edge of the cell, a phenomenon called the "near-far effect". In the terrestrial cellular network, due to the obvious 'near-far effect', the terminal device can judge whether the channel state is good enough through RSRP measurement, so as to select SUL carrier or NUL carrier to initiate random access. However, in NTN, as shown in fig. 11 (b), since the spatial path loss between the terminal device and the network device varies with the distance, that is, the difference between the RSRP when the terminal device is at the cell center and the RSRP when the terminal device is at the cell edge is not obvious, if RSRP measurement is still adopted to select the SUL carrier or NUL carrier, on one hand, it is difficult to set a suitable RSRP threshold, on the other hand, there is a large error in RSRP measurement, which is likely to cause the terminal device to select an unsuitable uplink carrier, thereby failing to achieve the purpose of expanding uplink coverage, and seriously affecting user experience.

Based on this, the embodiment of the application provides a random access method, which can be used for a terminal device in an NTN system to determine an uplink carrier used in a random access process. The following describes the technical solution of the present application in connection with several embodiments.

Referring to fig. 12, a flowchart of a random access method according to an embodiment of the present application is shown, where the method may be applied to the network architecture shown in fig. 1 to 5, and the method may include at least some of the following steps (steps 1210 to 1230).

In step 1210, the network device sends first configuration information to the terminal device.

The network device may configure RACH (Random Access Channel ) related parameters for the terminal device in order for the terminal device to initiate a random access procedure. In this embodiment of the present application, the network device sends first configuration information to the terminal device, where the first configuration information is used for the terminal device to select an uplink carrier used in a random access procedure, where the uplink carrier includes a NUL carrier or a SUL carrier. Optionally, there is an association relationship between the SUL carrier and the NUL carrier, which belong to the same TAG.

The content of the first configuration information is not limited, optionally, the first configuration information includes a condition of using a NUL carrier and/or a condition of using a SUL carrier, for example, the condition of using the SUL carrier includes that a serving cell where the terminal device is located configures the SUL carrier; alternatively, the first configuration information includes a threshold value of the selection parameter, for example, the terminal device measures the selection parameter (such as round trip transmission delay, distance, etc.), then compares the measured result with the threshold value, selects the NUL carrier if the measured result is higher than the threshold value, and selects the SUL carrier if the measured result is lower than the threshold value. For other descriptions about the content of the first configuration information, please refer to the following method embodiments, which are not repeated here. The embodiment of the present application also does not limit the sending manner of the first configuration information, alternatively, the first configuration information is configured in common for the cells, and the network device carries the first configuration information in the system information sent to the terminal device, for example, the first configuration information is carried in SIBx (System Information Block x ); and/or the network device carries the first configuration information in a broadcast message broadcast to the terminal device.

In step 1220, the terminal device determines, based on the first configuration information, an uplink carrier used in the random access procedure, where the uplink carrier includes a NUL carrier or a SUL carrier.

After receiving the first configuration information, the terminal device determines an uplink carrier used in the random access process based on the first configuration information, that is, selects a NUL carrier or a SUL carrier to initiate the random access process based on the first configuration information. To ensure that the uplink carrier determined by the terminal device can successfully initiate the random access procedure, in one example, step 1220 includes: and under the condition that the SUL carrier is configured in the service cell where the terminal equipment is located, the terminal equipment determines the uplink carrier based on the first configuration information. By executing step 1220 in the case that the SUL carrier is configured in the serving cell in which the terminal device is located, the problem that the random access process fails because the SUL carrier is not configured in the serving cell in which the terminal device is located, but the terminal device selects the SUL carrier to initiate the random access process, is effectively avoided.

In the embodiment of the application, the network device configures parameters related to the RACH for the terminal device through the first configuration information, and may also send second configuration information to the terminal device, where the second configuration information includes an uplink carrier used by the terminal device in a random access process, so as to achieve an effect of explicitly configuring the uplink carrier for the terminal device. In order to avoid collision between the uplink carrier selected by the terminal device based on the first configuration information and the uplink carrier indicated by the second configuration information, the network device may send only the second configuration information to the terminal device or send only the first configuration information to the terminal device; alternatively, the priority between the first configuration information and the second configuration information may be set, for example, the priority of the second configuration information is set to be higher than the priority of the first configuration information, so that if the terminal device receives both the first configuration information and the second configuration information, the random access procedure is preferentially initiated using the uplink carrier indicated by the second configuration information.

Based on this, in one example, step 1220 described above includes: and under the condition that the second configuration information from the network equipment is not received and the SUL carrier is configured in the service cell where the terminal equipment is located, the terminal equipment determines the uplink carrier based on the first configuration information. That is, the terminal device performs the above step 1220 in the case where the network device does not explicitly configure the uplink carrier and the SUL carrier is configured by the serving cell in which the terminal device is located. In the embodiment of the present application, the manner in which the network device explicitly configures the uplink carrier is not limited (that is, the manner in which the second configuration information is sent is not limited), optionally, the second configuration information is configured in common to the cell, and the network device carries the second configuration information in the system information sent to the terminal device, for example, the second configuration information is carried in SIBx (System Information Block x ); and/or the network device carries the second configuration information in a broadcast message broadcast to the terminal device.

In step 1230, the terminal device sends a random access request to the network device based on the uplink carrier.

After the terminal device selects the uplink carrier based on the first configuration information, a random access request is initiated to the network device based on the selected uplink carrier. As can be seen from the foregoing embodiments, the network device may also explicitly configure an uplink carrier for the terminal device, and based on this, in one example, the foregoing method further includes: and under the condition that the second configuration information from the network equipment is received, the terminal equipment sends a random access request to the network equipment based on the uplink carrier wave included in the second configuration information. Optionally, after determining an uplink carrier used in the random access procedure, the terminal device selects RACH resources on the uplink carrier, and sends a random access request to the network device on the selected RACH resources.

The embodiment of the application does not limit the type of the random access process initiated by the terminal equipment, alternatively, the random access process initiated by the terminal equipment is a four-step random access process, and the random access request sent by the terminal equipment to the network equipment comprises Msg1; or the random access process initiated by the terminal equipment is a two-step random access process, and the random access request sent by the terminal equipment to the network equipment comprises MsgA. Alternatively, the terminal device initiated random access procedure is a contention based random access procedure or a non-contention based random access procedure.

In summary, according to the technical scheme provided by the embodiment of the application, the terminal device selects the uplink carrier based on the configuration information sent by the network device, and initiates the random access process based on the selected uplink carrier, so that the terminal device is ensured to initiate the random access process by using the appropriate uplink carrier, and the success rate of random access is improved. In addition, in the embodiment of the application, the uplink carrier used by the terminal equipment in the random access process comprises a NUL carrier or a SUL carrier, and the effect of expanding uplink coverage is achieved by associating the SUL carrier with the NUL carrier.

Next, description will be made with respect to the content of the first configuration information, a procedure in which the terminal device selects an uplink carrier based on the first configuration information, and the like.

In one example, the first configuration information includes a first threshold value; step 1220 includes: the terminal equipment measures transmission parameters between the terminal equipment and the network equipment to obtain a first measured value; an uplink carrier is determined based on the first measurement and a first threshold.

The transmission parameters between the terminal device and the network device include Round Trip Time (RTT) or RTD (Round Trip Delay) and/or transmission distance. In one aspect, the network device configures a first threshold value for the terminal device, the first threshold value corresponding to the transmission parameter; on the other hand, the terminal device obtains a first measurement value corresponding to the transmission parameter based on the measurement. The terminal device then determines an uplink carrier based on a comparison of the first threshold value and the first measurement value. For other description of the measurement of the transmission parameter by the terminal device to obtain the first measurement value, please refer to the following embodiments, which are not repeated here.

Alternatively, the smaller the round trip transmission delay and/or transmission distance between the terminal device and the network device, the closer the terminal device is to the network device, so that the better the air interface quality will generally be. Therefore, in the case that the first measured value is smaller than the first threshold value, the air interface quality is generally better; in the case that the first measurement is greater than the first threshold value, this is typically indicative of poor air interface quality. Based on this, optionally, determining the uplink carrier based on the first measurement value and the first threshold value includes: determining that the uplink carrier comprises a NUL carrier when the first measured value is smaller than a first threshold value; and determining that the uplink carrier comprises the SUL carrier under the condition that the first measured value is larger than a first threshold value. Of course, "select the SUL carrier when the first measurement is less than the first threshold value; the technical solution of selecting NUL carriers when the first measurement value is greater than the first threshold value shall also fall within the protection scope of the present application. It should be understood that, in the case where the first measurement value is equal to the first threshold value, the terminal device may select either the NUL carrier or the SUL carrier, which is not limited in this embodiment of the present application.

Fig. 13 is a schematic diagram illustrating uplink carrier selection according to an embodiment of the present application. As shown in fig. 13, the coverage of the network device (i.e., satellite 132) is divided into two parts: coverage 134 with better air quality and coverage 136 with worse air quality. In a coverage area 134 with better air interface quality, a first measured value obtained by measuring transmission parameters between terminal equipment and network equipment by the terminal equipment is smaller than a set first threshold value; in the coverage 136 with poor air interface quality, the first measured value obtained by the terminal device measuring the transmission parameter between the terminal device and the network device is greater than the set first threshold value. As shown in fig. 13, if the terminal device 131 is located within the coverage area 134, a random access procedure is initiated using a NUL carrier; terminal device 133 is located within coverage 136 and initiates a random access procedure using the SUL carrier.

In another example, the first configuration information includes a transmission parameter reference value and a second threshold value; step 1220 includes: the terminal equipment measures transmission parameters between the terminal equipment and the network equipment to obtain a first measured value; measuring the RSRP to obtain a second measured value; determining a first hybrid measurement based on the transmission parameter reference value, the first measurement and the second measurement; an uplink carrier is determined based on the first hybrid measurement and a second threshold.

The transmission parameters between the terminal device and the network device include round trip transmission time (e.g., RTT or RTD) and/or transmission distance. On the one hand, the terminal equipment obtains a first measured value corresponding to the transmission parameter based on measurement and obtains a second measured value based on measurement of RSRP; on the other hand, the network device configures a transmission parameter reference value corresponding to the transmission parameter for the terminal device, the terminal device determines a first hybrid measurement value based on the transmission parameter reference value, the first measurement value and the second measurement value, and the network device configures a second threshold value corresponding to the first hybrid measurement value for the terminal device. The terminal device then determines an uplink carrier based on the comparison of the first hybrid measurement value and the second threshold value. For other description of the measurement of the transmission parameter by the terminal device to obtain the first measurement value, please refer to the following embodiments, which are not repeated here.

Optionally, the determining, by the terminal device, the first hybrid measurement value based on the transmission parameter reference value, the first measurement value, and the second measurement value includes: the difference between the transmission parameter reference value and the first measurement value is multiplied by the second measurement value to obtain a first mixed measurement value. Illustratively, the transmission parameter is denoted RTT, the transmission parameter reference value is denoted as the maximum value of RTT (i.e. rtt_max), the first measurement value is denoted as rtt_measure, the second measurement value is denoted as RSRP, and the first hybrid measurement value is denoted as (rtt_max-rtt_measure) ×rsrp. Of course, the transmission parameter reference value may be a minimum value of the transmission parameter, the transmission parameter may be a round trip distance, and the first mixed measurement value may be calculated in other manners, for example, a difference between the first measurement value and the transmission parameter reference value (a difference obtained by subtracting the transmission parameter reference value from the first measurement value) is divided by the second measurement value to obtain the first mixed measurement value, which is not limited in the embodiments of the present application.

Optionally, the determining the uplink carrier based on the first mixed measurement value and the second threshold value includes: determining that the uplink carrier comprises a NUL carrier if the first hybrid measurement is greater than a second threshold; and determining that the uplink carrier comprises the SUL carrier in the case that the first hybrid measurement is less than the second threshold. Of course, "NUL carrier is selected when the first hybrid measurement is less than the second threshold value; the technical solution of selecting the SUL carrier "when the first hybrid measurement is greater than the second threshold value shall also fall within the scope of protection of the present application. It should be understood that, in the case where the first hybrid measurement value is equal to the second threshold value, the terminal device may select either the NUL carrier or the SUL carrier, which is not limited in this embodiment of the present application.

In both examples, the terminal device needs to measure the transmission parameters between the terminal device and the network device to obtain the first measurement value. In one example, the terminal device measures a transmission parameter between the terminal device and the network device to obtain a first measured value, including: the terminal equipment measures transmission parameters based on measurement reference information to obtain a first measured value; wherein the measurement reference information includes at least one of: position information of the terminal equipment, satellite ephemeris information and transmission parameters corresponding to the feeder link. Optionally, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in the system information; and/or, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in the broadcast message. Optionally, the location information of the terminal device is measured by the terminal device by means of GNSS (Global Navigation Satellite System, global satellite navigation system).

Illustratively, in NTN, the transmission parameters between the terminal device and the network device may include transmission parameters between the terminal device and the satellite. In this case, the terminal device may determine the first measurement value based on two measurement reference values, namely, the position information and the satellite ephemeris information of the terminal device.

Illustratively, in NTN, the transmission parameters between the terminal device and the network device may further include transmission parameters between the terminal device and a terrestrial network device (e.g., NTN gateway). In this case, the terminal device may determine the first measurement value based on three measurement reference values of the position information of the terminal device, the satellite ephemeris information, and the transmission parameters corresponding to the feeder link. For example, the terminal device determines a transmission parameter corresponding to a service link (service link) based on location information and satellite ephemeris information of the terminal device; and then, carrying out summation processing on the transmission parameters corresponding to the service link and the transmission parameters corresponding to the feeder link to obtain a first measured value.

In yet another example, the first configuration information includes n reference points, and third threshold values corresponding to the n reference points, respectively, n being equal to 1 or n being an integer greater than 1; step 1220 includes: the terminal equipment respectively measures the distances between the terminal equipment and n reference points to obtain third measured values respectively corresponding to the n reference points; and determining the uplink carrier based on the third measured values corresponding to the n reference points and the third threshold values corresponding to the n reference points.

In this example, the network device configures n reference points for the terminal device, n being equal to 1 or n being greater than 1, i.e. the network device configures one or more reference points for the terminal device. Optionally, the reference point is a ground reference point. The embodiment of the application does not limit the distribution of the n reference points, and optionally, the n reference points are uniformly distributed around the coverage center point of the network device. On the one hand, the terminal equipment respectively measures the distances between the terminal equipment and n reference points to obtain third measured values respectively corresponding to the n reference points; on the other hand, the network device configures the terminal device with the third threshold values corresponding to the n reference points respectively. And then, the terminal equipment determines the uplink carrier based on comparison of the third measured value and the third threshold value which are respectively corresponding to the n reference points.

Optionally, the determining the uplink carrier based on the third measurement values corresponding to the n reference points and the third threshold values corresponding to the n reference points includes: determining that the uplink carrier comprises a NUL carrier under the condition that a third measured value corresponding to any one of the n reference points is smaller than a third threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that the third measured value corresponding to each reference point in the n reference points is larger than the third threshold value corresponding to the reference point. Of course, "when the third measured value corresponding to any reference point is greater than the third threshold value corresponding to the reference point, the terminal device selects the SUL carrier; when the third measured value corresponding to each reference point is smaller than the third threshold value corresponding to the reference point, the technical scheme of selecting the NUL carrier by the terminal equipment shall also belong to the protection scope of the application. It should be understood that, for the case where the third measurement value corresponding to any reference point is equal to the third threshold value corresponding to the reference point, and for the case where the third measurement value corresponding to each reference point is equal to the third threshold value corresponding to the reference point, the terminal device may select either the NUL carrier or the SUL carrier, which is not limited in this embodiment of the present application.

Optionally, the third threshold values corresponding to the n reference points configured by the network device for the terminal device may be the same, that is, the third threshold values corresponding to the n reference points are all the first numerical values; or, the third threshold values corresponding to at least two reference points in the n reference points configured by the network device for the terminal device may be different. Optionally, the network device may configure the third threshold values corresponding to the n reference points based on the distances between the n reference points and the coverage center point of the network device. Illustratively, in the case that the reference point is closer to the coverage center point of the network device, the third threshold value corresponding to the reference point is configured to be larger; and under the condition that the reference point is far away from the coverage center point of the network equipment, configuring a third threshold value corresponding to the reference point to be smaller.

For example, please refer to fig. 14, which illustrates a schematic diagram of uplink carrier selection provided in an embodiment of the present application. As shown in fig. 14, the network device is configured with 6 reference points. In the coverage areas 142 corresponding to the 6 reference points respectively, the distance between the terminal equipment and the reference point corresponding to the coverage area is smaller than a third threshold value corresponding to the reference point; outside the coverage areas 142 corresponding to the 6 reference points respectively, the distance between the terminal equipment and any reference point is greater than the third threshold value corresponding to the reference point. As shown in fig. 14, terminal device 141 initiates a random access procedure using a NUL carrier within coverage area 142 corresponding to reference point 2; the terminal device 143 initiates a random access procedure using NUL carrier within the coverage area 142 corresponding to the reference point 5; terminal device 145 and terminal device 147 are outside the coverage area corresponding to all reference points, then the SUL carrier is used to initiate the random access procedure.

In yet another example, the first configuration information includes n reference points, distance reference values corresponding to the n reference points, respectively, and fourth threshold values corresponding to the n reference points, respectively, n being equal to 1 or n being an integer greater than 1; step 1220 includes: the terminal equipment respectively measures the distances between the terminal equipment and n reference points to obtain third measured values respectively corresponding to the n reference points; measuring the RSRP to obtain a second measured value; determining second mixed measurement values corresponding to the n reference points based on the distance reference values corresponding to the n reference points respectively, the third measurement values corresponding to the n reference points respectively and the second measurement values; and determining the uplink carrier based on the second mixed measured value corresponding to the n reference points and the fourth threshold value corresponding to the n reference points.

In this example, the network device configures n reference points for the terminal device, n being equal to 1 or n being greater than 1, i.e. the network device configures one or more reference points for the terminal device. Optionally, the reference point is a ground reference point. The embodiment of the application does not limit the distribution of the n reference points, and optionally, the n reference points are uniformly distributed around the coverage center point of the network device. On one hand, the terminal equipment respectively measures the distances between the terminal equipment and n reference points to obtain third measured values respectively corresponding to the n reference points, and obtains second measured values based on RSRP measurement; on the other hand, the network device configures distance reference values corresponding to n reference points for the terminal device, the terminal device determines second mixed measurement values corresponding to n reference points based on the third measurement values corresponding to n reference points, the distance reference values corresponding to n reference points and the second measurement values, and the network device configures fourth threshold values corresponding to n reference points for the terminal device. Then, the terminal device determines the uplink carrier based on the comparison of the second mixed measurement values respectively corresponding to the n reference points and the fourth threshold values respectively corresponding to the n reference points.

Optionally, determining the second mixed measurement value corresponding to each of the n reference points based on the distance reference value corresponding to each of the n reference points, the third measurement value corresponding to each of the n reference points, and the second measurement value corresponding to each of the n reference points includes: for the ith reference point in the n reference points, multiplying the difference value between the distance reference value corresponding to the ith reference point and the third measured value corresponding to the ith reference point by the second measured value to obtain a second mixed measured value corresponding to the ith reference point; i is a positive integer less than or equal to n. Illustratively, the distance is denoted as d, the distance reference value corresponding to the i-th reference point is denoted as d maximum value (i.e., d_max), the third measurement value corresponding to the i-th reference point is denoted as d_measure, the second measurement value is denoted as RSRP, and the second mixed measurement value corresponding to the i-th reference point is denoted as (d_max-d_measure) ×rsrp. Of course, the distance reference value corresponding to the ith reference point may be the minimum value of the distance, and the second mixed measurement value corresponding to the ith reference point may also be calculated in other manners, for example, a difference value between the third measurement value corresponding to the ith reference point and the distance reference value corresponding to the ith reference point (a difference value obtained by subtracting the distance reference value corresponding to the ith reference point from the third measurement value corresponding to the ith reference point) is divided by the second measurement value, which is not limited in the embodiment of the present application.

Optionally, determining the uplink carrier based on the second mixed measurement values respectively corresponding to the n reference points and the fourth threshold values respectively corresponding to the n reference points includes: determining that the uplink carrier comprises a NUL carrier under the condition that a second mixed measured value corresponding to any one of the n reference points is larger than a fourth threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that the second mixed measured value corresponding to each reference point in the n reference points is smaller than the fourth threshold value corresponding to the reference point. Of course, "when the second mixed measurement value corresponding to each reference point is greater than the fourth threshold value corresponding to the reference point, the terminal device selects the NUL carrier; when the second mixed measurement value corresponding to any reference point is smaller than the fourth threshold value corresponding to the reference point, the technical scheme of selecting the SUL carrier by the terminal equipment shall also belong to the protection scope of the application. It should be understood that, for the case where the second mixed measurement value corresponding to any reference point is equal to the fourth threshold value corresponding to the reference point, and for the case where the second mixed measurement value corresponding to each reference point is equal to the fourth threshold value corresponding to the reference point, the terminal device may select either the NUL carrier or the SUL carrier, which is not limited in the embodiment of the present application.

Optionally, the fourth threshold values corresponding to the n reference points configured by the network device for the terminal device may be the same, that is, the fourth threshold values corresponding to the n reference points are all third values; or, the fourth threshold value corresponding to at least two reference points in the n reference points configured by the network device for the terminal device may be different. Optionally, the network device may configure the fourth threshold value corresponding to the n reference points based on the distance between the n reference points and the coverage center point of the network device. Illustratively, in the case that the reference point is closer to the coverage center point of the network device, the fourth threshold value corresponding to the reference point is configured to be smaller; and under the condition that the reference point is far away from the coverage center point of the network equipment, configuring the third threshold value corresponding to the reference point to be larger. Optionally, the distance reference values corresponding to the n reference points configured by the network device for the terminal device may be the same, that is, the distance reference values corresponding to the n reference points are all second values; or, the distance reference values corresponding to at least two reference points in the n reference points configured by the network device for the terminal device may be different. Optionally, the network device may configure the distance reference values corresponding to the n reference points based on the distances between the n reference points and the coverage center point of the network device. For example, in the case that the reference point is closer to the coverage center point of the network device, the distance reference value corresponding to the reference point is configured to be larger; and in the case that the reference point is far from the coverage center point of the network equipment, configuring the distance reference value corresponding to the reference point to be smaller.

In summary, according to the technical solution provided in the embodiments of the present application, through the measurement based on the transmission parameters between the terminal device and the network device, or through the selection of the uplink carrier used in the random access process based on the measurement based on the distance between the terminal device and at least one reference point, the random access process initiated by using the NUL carrier for the terminal device in the center of the serving cell and the random access process initiated by using the SUL carrier for the terminal device at the edge of the serving cell are implemented, so that the uplink coverage is improved, and the terminal device in the network coverage can select the appropriate uplink carrier, thereby improving the success rate of the random access.

It should be noted that, in the above embodiment, the technical solution provided in the embodiment of the present application is described from the perspective of interaction between the terminal device and the network device. In the above embodiment, the steps executed by the terminal device may be implemented as a random access method on the terminal device side alone; the steps performed by the network device may be implemented as a random access method on the network device side.

The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

Referring to fig. 15, a block diagram of a random access device according to an embodiment of the present application is shown. The device has the function of realizing the method example of the terminal equipment side, and the function can be realized by hardware or can be realized by executing corresponding software by hardware. The device may be the terminal device described above, or may be provided in the terminal device. The device can be applied to NTN. As shown in fig. 15, the apparatus 1500 may include: an information receiving module 1510, a carrier determining module 1520, and a random access module 1530.

The information receiving module 1510 is configured to receive first configuration information from a network device.

A carrier determining module 1520, configured to determine, based on the first configuration information, an uplink carrier used in the random access procedure, where the uplink carrier includes a NUL carrier or a SUL carrier.

A random access module 1530, configured to send a random access request to the network device based on the uplink carrier.

In one example, the first configuration information includes a first threshold value; the carrier determining module 1520 is configured to: measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance; and determining the uplink carrier based on the first measured value and the first threshold value.

In one example, the determining the uplink carrier based on the first measurement value and the first threshold value includes: determining that the uplink carrier includes the NUL carrier if the first measurement value is less than the first threshold value; and determining that the uplink carrier comprises the SUL carrier under the condition that the first measured value is larger than the first threshold value.

In one example, the first configuration information includes a transmission parameter reference value and a second threshold value; the carrier determining module 1520 is configured to: measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance; measuring the RSRP to obtain a second measured value; determining a first hybrid measurement based on the transmission parameter reference value, the first measurement and the second measurement; the uplink carrier is determined based on the first hybrid measurement and the second threshold.

In one example, the determining the uplink carrier based on the first hybrid measurement and the second threshold value includes: determining that the uplink carrier includes the NUL carrier if the first hybrid measurement is greater than the second threshold; and determining that the uplink carrier comprises the SUL carrier under the condition that the first mixed measured value is smaller than the second threshold value.

In one example, the determining a first hybrid measurement based on the transmission parameter reference value, the first measurement, and the second measurement includes: and multiplying the difference value between the transmission parameter reference value and the first measured value by the second measured value to obtain the first mixed measured value.

In one example, the measuring the transmission parameter between the terminal device and the network device, to obtain a first measurement value includes: measuring the transmission parameters based on measurement reference information to obtain the first measurement value; wherein the measurement reference information includes at least one of: and the position information, satellite ephemeris information and transmission parameters corresponding to the feeder line link of the terminal equipment.

In one example, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in system information; and/or, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in a broadcast message.

In one example, the location information of the terminal device is obtained by GNSS measurements by the terminal device.

In one example, the first configuration information includes n reference points, and third threshold values corresponding to the n reference points respectively, where n is equal to 1 or n is an integer greater than 1; the carrier determining module 1520 is configured to: measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively; and determining the uplink carrier based on the third measured values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points.

In one example, the determining the uplink carrier based on the third measurement values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points includes: determining that the uplink carrier includes the NUL carrier when a third measured value corresponding to any one of the n reference points is smaller than a third threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that a third measured value corresponding to each reference point in the n reference points is larger than a third threshold value corresponding to the reference point.

In one example, the third threshold values corresponding to the n reference points are all the first values.

In one example, the first configuration information includes n reference points, distance reference values corresponding to the n reference points, and fourth threshold values corresponding to the n reference points, where n is equal to 1 or an integer greater than 1; the carrier determining module 1520 is configured to: measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively; measuring the RSRP to obtain a second measured value; determining second mixed measurement values corresponding to the n reference points based on the distance reference values corresponding to the n reference points respectively, the third measurement values corresponding to the n reference points respectively and the second measurement values; and determining the uplink carrier based on the second mixed measured value respectively corresponding to the n reference points and the fourth threshold value respectively corresponding to the n reference points.

In one example, the determining the uplink carrier based on the second mixed measurement values respectively corresponding to the n reference points and the fourth threshold value respectively corresponding to the n reference points includes: determining that the uplink carrier includes the NUL carrier when a second mixed measurement value corresponding to any one of the n reference points is greater than a fourth threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that the second mixed measured value corresponding to each reference point in the n reference points is smaller than a fourth threshold value corresponding to the reference point.

In one example, the determining the second mixed measurement value corresponding to the n reference points based on the distance reference values corresponding to the n reference points, the third measurement values corresponding to the n reference points, and the second measurement values, includes: for an ith reference point in the n reference points, multiplying a difference value between a distance reference value corresponding to the ith reference point and a third measured value corresponding to the ith reference point by the second measured value to obtain a second mixed measured value corresponding to the ith reference point; and i is a positive integer less than or equal to n.

In one example, the distance reference values corresponding to the n reference points are all second numerical values; and/or, the fourth threshold values corresponding to the n reference points are all third values.

In one example, the first configuration information is carried in system information; and/or the first configuration information is carried in a broadcast message.

In one example, the carrier determination module 1520 is configured to: and under the condition that the SUL carrier is configured in the service cell where the terminal equipment is located, determining the uplink carrier based on the first configuration information.

In one example, the carrier determination module 1520 is configured to: determining the uplink carrier based on the first configuration information under the condition that the second configuration information from the network equipment is not received and the SUL carrier is configured in a service cell where the terminal equipment is located; the second configuration information includes an uplink carrier used by the terminal device in the random access process.

In one example, the random access module 1530 is further configured to: and sending the random access request to the network equipment based on the uplink carrier wave included in the second configuration information under the condition that the second configuration information from the network equipment is received.

In one example, the second configuration information is carried in system information; and/or, the second configuration information is carried in a broadcast message.

Referring to fig. 16, a block diagram of a random access device according to an embodiment of the present application is shown. The device has the function of realizing the method example of the network equipment side, and the function can be realized by hardware or can be realized by executing corresponding software by hardware. The apparatus may be a network device as described above, or may be provided in a network device. The device can be applied to NTN. As shown in fig. 16, the apparatus 1600 may include: an information transmission module 1610 and a random access module 1620.

An information sending module 1610, configured to send first configuration information to a terminal device, where the first configuration information is used for the terminal device to determine an uplink carrier used in a random access process, where the uplink carrier includes a NUL carrier or a SUL carrier.

A random access module 1620, configured to receive a random access request sent by the terminal device through the uplink carrier.

In one example, the information sending module 1610 is further configured to send second configuration information to the terminal device, where the second configuration information includes an uplink carrier used by the terminal device in the random access procedure; the random access module 1620 is further configured to receive a random access request sent by the terminal device through an uplink carrier included in the second configuration information.

It should be noted that, when the apparatus provided in the foregoing embodiment performs the functions thereof, only the division of the respective functional modules is used as an example, in practical application, the foregoing functional allocation may be performed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to perform all or part of the functions described above.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with embodiments of the method, and will not be described in detail herein.

Referring to fig. 17, a schematic structural diagram of a terminal device 170 according to an embodiment of the present application is shown, and for example, the terminal device may be used to perform the above-mentioned random access method on the terminal device side. Specifically, the terminal device 170 may include: a processor 171 and a transceiver 172 connected to the processor 171; wherein:

the processor 171 includes one or more processing cores, and the processor 171 executes various functional applications and information processing by running software programs and modules.

The transceiver 172 includes a receiver and a transmitter. Optionally, transceiver 172 is a communication chip.

In one example, the terminal device 170 further includes: memory and bus. The memory is connected to the processor through a bus. The memory may be used for storing a computer program, and the processor is used for executing the computer program to implement the steps executed by the terminal device in the above-mentioned method embodiment.

Further, the memory may be implemented by any type of volatile or nonvolatile memory device, including but not limited to: RAM (Random-Access Memory) and ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash Memory or other solid state Memory technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high density digital video disc) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.

The transceiver 172 is configured to receive first configuration information from a network device.

The processor 171 is configured to determine an uplink carrier used in a random access procedure based on the first configuration information, where the uplink carrier includes a NUL carrier or a SUL carrier.

The transceiver 172 is configured to send a random access request to the network device based on the uplink carrier.

In one example, the first configuration information includes a first threshold value; the processor 171 is configured to: measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance; and determining the uplink carrier based on the first measured value and the first threshold value.

In one example, the processor 171 is further configured to: determining that the uplink carrier includes the NUL carrier if the first measurement value is less than the first threshold value; and determining that the uplink carrier comprises the SUL carrier under the condition that the first measured value is larger than the first threshold value.

In one example, the first configuration information includes a transmission parameter reference value and a second threshold value; the processor 171 is configured to: measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance; measuring the RSRP to obtain a second measured value; determining a first hybrid measurement based on the transmission parameter reference value, the first measurement and the second measurement; the uplink carrier is determined based on the first hybrid measurement and the second threshold.

In one example, the processor 171 is further configured to: determining that the uplink carrier includes the NUL carrier if the first hybrid measurement is greater than the second threshold; and determining that the uplink carrier comprises the SUL carrier under the condition that the first mixed measured value is smaller than the second threshold value.

In one example, the processor 171 is further configured to: and multiplying the difference value between the transmission parameter reference value and the first measured value by the second measured value to obtain the first mixed measured value.

In one example, the processor 171 is further configured to: measuring the transmission parameters based on measurement reference information to obtain the first measurement value; wherein the measurement reference information includes at least one of: and the position information, satellite ephemeris information and transmission parameters corresponding to the feeder line link of the terminal equipment.

In one example, the first configuration information includes n reference points, and third threshold values corresponding to the n reference points respectively, where n is equal to 1 or n is an integer greater than 1; the processor 171 is configured to: measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively; and determining the uplink carrier based on the third measured values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points.

In one example, the processor 171 is further configured to: determining that the uplink carrier includes the NUL carrier when a third measured value corresponding to any one of the n reference points is smaller than a third threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that a third measured value corresponding to each reference point in the n reference points is larger than a third threshold value corresponding to the reference point.

In one example, the first configuration information includes n reference points, distance reference values corresponding to the n reference points, and fourth threshold values corresponding to the n reference points, where n is equal to 1 or an integer greater than 1; the processor 171 is configured to: measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively; measuring the RSRP to obtain a second measured value; determining second mixed measurement values corresponding to the n reference points based on the distance reference values corresponding to the n reference points respectively, the third measurement values corresponding to the n reference points respectively and the second measurement values; and determining the uplink carrier based on the second mixed measured value respectively corresponding to the n reference points and the fourth threshold value respectively corresponding to the n reference points.

In one example, the processor 171 is configured to: determining that the uplink carrier includes the NUL carrier when a second mixed measurement value corresponding to any one of the n reference points is greater than a fourth threshold value corresponding to the reference point; and determining that the uplink carrier comprises the SUL carrier under the condition that the second mixed measured value corresponding to each reference point in the n reference points is smaller than a fourth threshold value corresponding to the reference point.

In one example, the processor 171 is configured to: for an ith reference point in the n reference points, multiplying a difference value between a distance reference value corresponding to the ith reference point and a third measured value corresponding to the ith reference point by the second measured value to obtain a second mixed measured value corresponding to the ith reference point; and i is a positive integer less than or equal to n.

In one example, the processor 171 is configured to: and under the condition that the SUL carrier is configured in the service cell where the terminal equipment is located, determining the uplink carrier based on the first configuration information.

In one example, the processor 171 is configured to: determining the uplink carrier based on the first configuration information under the condition that the second configuration information from the network equipment is not received and the SUL carrier is configured in a service cell where the terminal equipment is located; the second configuration information includes an uplink carrier used by the terminal device in the random access process.

In one example, the transceiver 172 is further configured to: and sending the random access request to the network equipment based on the uplink carrier wave included in the second configuration information under the condition that the second configuration information from the network equipment is received.

Referring to fig. 18, a schematic structural diagram of a network device 180 according to an embodiment of the present application is shown, and for example, the network device may be used to perform the random access method on the network device side. In particular, the network device 180 may include: a processor 181 and a transceiver 182 coupled to the processor 181; wherein:

The processor 181 includes one or more processing cores, and the processor 181 executes various functional applications and information processing by running software programs and modules.

The transceiver 182 includes a receiver and a transmitter. Alternatively, the transceiver 182 is a communication chip.

In one example, the terminal device 180 further includes: memory and bus. The memory is connected to the processor through a bus. The memory may be used to store a computer program for execution by the processor to perform the steps performed by the network device in the method embodiments described above.

Further, the memory may be implemented by any type of volatile or nonvolatile memory device, including but not limited to: RAM and ROM, EPROM, EEPROM, flash memory or other solid state memory technology, CD-ROM, DVD or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.

The transceiver 182 is configured to send first configuration information to a terminal device, where the first configuration information is used for the terminal device to determine an uplink carrier used in a random access procedure, and the uplink carrier includes a NUL carrier or a SUL carrier.

The transceiver 182 is configured to receive a random access request sent by the terminal device through the uplink carrier.

In one example, the transceiver 182 is further configured to send second configuration information to the terminal device, where the second configuration information includes an uplink carrier used by the terminal device in the random access procedure; and receiving a random access request sent by the terminal equipment through the uplink carrier wave included in the second configuration information.

The embodiment of the application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is used for being executed by a processor of terminal equipment to realize the random access method at the terminal equipment side.

The embodiment of the application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is used for being executed by a processor of network equipment to realize the random access method at the network equipment side.

The embodiment of the application also provides a chip, which comprises a programmable logic circuit and/or program instructions and is used for realizing the random access method at the terminal equipment side when the chip runs on the terminal equipment.

The embodiment of the application also provides a chip, which comprises a programmable logic circuit and/or program instructions and is used for realizing the random access method at the network equipment side when the chip runs on the network equipment.

The present application also provides a computer program product which, when run on a terminal device side computer, causes the computer to perform the above-described terminal device side random access method.

The present application also provides a computer program product, which when run on a network device side computer, causes the computer to perform the above random access method on the network device side.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing description of the exemplary embodiments of the present application is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and scope of the invention.

Claims

A random access method, applied to terminal equipment of a non-terrestrial communication network NTN, comprising:

receiving first configuration information from a network device;

based on the first configuration information, determining an uplink carrier used in a random access process, wherein the uplink carrier comprises a normal uplink NUL carrier or a supplementary uplink SUL carrier;

and sending a random access request to the network equipment based on the uplink carrier.
The method of claim 1, wherein the first configuration information comprises a first threshold value; the determining, based on the first configuration information, an uplink carrier used in a random access process includes:

measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance;

and determining the uplink carrier based on the first measured value and the first threshold value.
The method of claim 2, wherein the determining the uplink carrier based on the first measurement value and the first threshold value comprises:

determining that the uplink carrier includes the NUL carrier if the first measurement value is less than the first threshold value;

and determining that the uplink carrier comprises the SUL carrier under the condition that the first measured value is larger than the first threshold value.
The method of claim 1, wherein the first configuration information comprises a transmission parameter reference value and a second threshold value; the determining, based on the first configuration information, an uplink carrier used in a random access process includes:

measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance;

measuring the Reference Signal Received Power (RSRP) to obtain a second measured value;

determining a first hybrid measurement based on the transmission parameter reference value, the first measurement and the second measurement;

the uplink carrier is determined based on the first hybrid measurement and the second threshold.
The method of claim 4, wherein the determining the uplink carrier based on the first mixing measurement and the second threshold comprises:

determining that the uplink carrier includes the NUL carrier if the first hybrid measurement is greater than the second threshold;

and determining that the uplink carrier comprises the SUL carrier under the condition that the first mixed measured value is smaller than the second threshold value.
The method according to claim 4 or 5, wherein said determining a first hybrid measurement based on said transmission parameter reference value, said first measurement and said second measurement comprises:

and multiplying the difference value between the transmission parameter reference value and the first measured value by the second measured value to obtain the first mixed measured value.
The method according to any of the claims 2 to 6, wherein said measuring transmission parameters between the terminal device and the network device to obtain a first measurement value comprises:

measuring the transmission parameters based on measurement reference information to obtain the first measurement value;

wherein the measurement reference information includes at least one of: and the position information, satellite ephemeris information and transmission parameters corresponding to the feeder line link of the terminal equipment.
The method of claim 7, wherein the satellite ephemeris information and/or transmission parameters corresponding to the feeder link are carried in system information; and/or, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in a broadcast message.
The method according to claim 7 or 8, characterized in that the location information of the terminal device is obtained by the terminal device by means of global navigation satellite system GNSS measurements.
The method according to claim 1, wherein the first configuration information includes n reference points, and third threshold values respectively corresponding to the n reference points, where n is equal to 1 or is an integer greater than 1; the determining, based on the first configuration information, an uplink carrier used in a random access process includes:

measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively;

and determining the uplink carrier based on the third measured values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points.
The method of claim 10, wherein determining the uplink carrier based on the third measurement values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points comprises:

Determining that the uplink carrier includes the NUL carrier when a third measured value corresponding to any one of the n reference points is smaller than a third threshold value corresponding to the reference point;

and determining that the uplink carrier comprises the SUL carrier under the condition that a third measured value corresponding to each reference point in the n reference points is larger than a third threshold value corresponding to the reference point.
The method according to claim 10 or 11, wherein the third threshold values corresponding to the n reference points are all the first values.
The method according to claim 1, wherein the first configuration information includes n reference points, distance reference values corresponding to the n reference points, respectively, and a fourth threshold value corresponding to the n reference points, respectively, the n being equal to 1 or the n being an integer greater than 1; the determining, based on the first configuration information, an uplink carrier used in a random access process includes:

measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively;

measuring the RSRP to obtain a second measured value;

determining second mixed measurement values corresponding to the n reference points based on the distance reference values corresponding to the n reference points respectively, the third measurement values corresponding to the n reference points respectively and the second measurement values;

And determining the uplink carrier based on the second mixed measured value respectively corresponding to the n reference points and the fourth threshold value respectively corresponding to the n reference points.
The method of claim 13, wherein the determining the uplink carrier based on the second mixing measurement value corresponding to the n reference points and the fourth threshold value corresponding to the n reference points, respectively, comprises:

determining that the uplink carrier includes the NUL carrier when a second mixed measurement value corresponding to any one of the n reference points is greater than a fourth threshold value corresponding to the reference point;

and determining that the uplink carrier comprises the SUL carrier under the condition that the second mixed measured value corresponding to each reference point in the n reference points is smaller than a fourth threshold value corresponding to the reference point.
The method according to claim 13 or 14, wherein the determining the second hybrid measurement value corresponding to the n reference points based on the distance reference value corresponding to the n reference points, the third measurement value corresponding to the n reference points, and the second measurement value, respectively, comprises:

for an ith reference point in the n reference points, multiplying a difference value between a distance reference value corresponding to the ith reference point and a third measured value corresponding to the ith reference point by the second measured value to obtain a second mixed measured value corresponding to the ith reference point; and i is a positive integer less than or equal to n.
The method according to any one of claims 13 to 15, wherein the distance reference values corresponding to the n reference points are each a second value; and/or, the fourth threshold values corresponding to the n reference points are all third values.
The method according to any one of claims 1 to 16, wherein the first configuration information is carried in system information; and/or the first configuration information is carried in a broadcast message.
The method according to any one of claims 1 to 17, wherein the determining an uplink carrier used in a random access procedure based on the first configuration information comprises:

and under the condition that the SUL carrier is configured in the service cell where the terminal equipment is located, determining the uplink carrier based on the first configuration information.
The method according to any one of claims 1 to 18, wherein the determining an uplink carrier used in a random access procedure based on the first configuration information comprises:

determining the uplink carrier based on the first configuration information under the condition that the second configuration information from the network equipment is not received and the SUL carrier is configured in a service cell where the terminal equipment is located;

The second configuration information includes an uplink carrier used by the terminal device in the random access process.
The method of claim 19, wherein the method further comprises:

and sending the random access request to the network equipment based on the uplink carrier wave included in the second configuration information under the condition that the second configuration information from the network equipment is received.
The method according to claim 19 or 20, wherein the second configuration information is carried in system information; and/or, the second configuration information is carried in a broadcast message.
A random access method, applied to a network device of a non-terrestrial communication network NTN, comprising:

transmitting first configuration information to a terminal device, wherein the first configuration information is used for determining an uplink carrier used in a random access process by the terminal device, and the uplink carrier comprises a normal uplink NUL carrier or a supplementary uplink SUL carrier;

and receiving a random access request sent by the terminal equipment through the uplink carrier.
The method of claim 22, wherein the first configuration information is carried in system information; and/or the first configuration information is carried in a broadcast message.
The method according to claim 22 or 23, characterized in that the method further comprises:

transmitting second configuration information to the terminal equipment, wherein the second configuration information comprises uplink carriers used by the terminal equipment in the random access process;

and receiving a random access request sent by the terminal equipment through the uplink carrier wave included in the second configuration information.
The method of claim 24, wherein the second configuration information is carried in system information; and/or, the second configuration information is carried in a broadcast message.
A random access device, characterized in that it is provided in a terminal device of a non-terrestrial communication network NTN, said device comprising:

the information receiving module is used for receiving first configuration information from the network equipment;

the carrier determining module is configured to determine an uplink carrier used in a random access process based on the first configuration information, where the uplink carrier includes a normal uplink NUL carrier or a supplementary uplink SUL carrier;

and the random access module is used for sending a random access request to the network equipment based on the uplink carrier.
The apparatus of claim 26, wherein the first configuration information comprises a first threshold value; the carrier wave determining module is used for:

Measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance;

and determining the uplink carrier based on the first measured value and the first threshold value.
The apparatus of claim 27, wherein the determining the uplink carrier based on the first measurement and the first threshold value comprises:

determining that the uplink carrier includes the NUL carrier if the first measurement value is less than the first threshold value;

and determining that the uplink carrier comprises the SUL carrier under the condition that the first measured value is larger than the first threshold value.
The apparatus of claim 26, wherein the first configuration information comprises a transmission parameter reference value and a second threshold value; the carrier wave determining module is used for:

measuring transmission parameters between the terminal equipment and the network equipment to obtain a first measured value, wherein the transmission parameters comprise round trip transmission time and/or transmission distance;

measuring the Reference Signal Received Power (RSRP) to obtain a second measured value;

Determining a first hybrid measurement based on the transmission parameter reference value, the first measurement and the second measurement;

the uplink carrier is determined based on the first hybrid measurement and the second threshold.
The apparatus of claim 29, wherein the determining the uplink carrier based on the first mixing measurement and the second threshold comprises:

determining that the uplink carrier includes the NUL carrier if the first hybrid measurement is greater than the second threshold;

and determining that the uplink carrier comprises the SUL carrier under the condition that the first mixed measured value is smaller than the second threshold value.
The apparatus of claim 29 or 30, wherein the determining a first hybrid measurement based on the transmission parameter reference value, the first measurement, and the second measurement comprises:

and multiplying the difference value between the transmission parameter reference value and the first measured value by the second measured value to obtain the first mixed measured value.
The apparatus according to any one of claims 27 to 31, wherein said measuring transmission parameters between the terminal device and the network device to obtain a first measurement value comprises:

Measuring the transmission parameters based on measurement reference information to obtain the first measurement value;

wherein the measurement reference information includes at least one of: and the position information, satellite ephemeris information and transmission parameters corresponding to the feeder line link of the terminal equipment.
The apparatus of claim 32, wherein the satellite ephemeris information and/or transmission parameters corresponding to the feeder link are carried in system information; and/or, the satellite ephemeris information and/or the transmission parameters corresponding to the feeder link are carried in a broadcast message.
The apparatus according to claim 32 or 33, wherein the location information of the terminal device is measured by the terminal device via a global navigation satellite system, GNSS.
The apparatus of claim 26, wherein the first configuration information includes n reference points, and a third threshold value corresponding to each of the n reference points, the n being equal to 1 or the n being an integer greater than 1; the carrier wave determining module is used for:

measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively;

And determining the uplink carrier based on the third measured values respectively corresponding to the n reference points and the third threshold values respectively corresponding to the n reference points.
The apparatus of claim 35, wherein determining the uplink carrier based on the third measured values for the n reference points and the third threshold values for the n reference points, respectively, comprises:

determining that the uplink carrier includes the NUL carrier when a third measured value corresponding to any one of the n reference points is smaller than a third threshold value corresponding to the reference point;

and determining that the uplink carrier comprises the SUL carrier under the condition that a third measured value corresponding to each reference point in the n reference points is larger than a third threshold value corresponding to the reference point.
The apparatus according to claim 35 or 36, wherein the third threshold values corresponding to the n reference points are all the first values.
The apparatus of claim 26, wherein the first configuration information includes n reference points, distance reference values respectively corresponding to the n reference points, and fourth threshold values respectively corresponding to the n reference points, the n being equal to 1 or the n being an integer greater than 1; the carrier wave determining module is used for:

Measuring the distances between the terminal equipment and the n reference points respectively to obtain third measured values corresponding to the n reference points respectively;

measuring the RSRP to obtain a second measured value;

determining second mixed measurement values corresponding to the n reference points based on the distance reference values corresponding to the n reference points respectively, the third measurement values corresponding to the n reference points respectively and the second measurement values;

and determining the uplink carrier based on the second mixed measured value respectively corresponding to the n reference points and the fourth threshold value respectively corresponding to the n reference points.
The apparatus of claim 38, wherein the determining the uplink carrier based on the second mixing measurement value corresponding to the n reference points and the fourth threshold value corresponding to the n reference points, respectively, comprises:

determining that the uplink carrier includes the NUL carrier when a second mixed measurement value corresponding to any one of the n reference points is greater than a fourth threshold value corresponding to the reference point;

and determining that the uplink carrier comprises the SUL carrier under the condition that the second mixed measured value corresponding to each reference point in the n reference points is smaller than a fourth threshold value corresponding to the reference point.
The apparatus of claim 38 or 39, wherein the determining the second hybrid measurement value for each of the n reference points based on the distance reference value for each of the n reference points, the third measurement value for each of the n reference points, and the second measurement value comprises:

for an ith reference point in the n reference points, multiplying a difference value between a distance reference value corresponding to the ith reference point and a third measured value corresponding to the ith reference point by the second measured value to obtain a second mixed measured value corresponding to the ith reference point; and i is a positive integer less than or equal to n.
The apparatus according to any one of claims 38 to 40, wherein the distance reference values corresponding to the n reference points are each a second value; and/or, the fourth threshold values corresponding to the n reference points are all third values.
The apparatus of any one of claims 26 to 41, wherein the first configuration information is carried in system information; and/or the first configuration information is carried in a broadcast message.
The apparatus of any one of claims 26 to 42, wherein the carrier determination module is configured to:

And under the condition that the SUL carrier is configured in the service cell where the terminal equipment is located, determining the uplink carrier based on the first configuration information.
The apparatus of any one of claims 26 to 43, wherein the carrier determination module is configured to:

determining the uplink carrier based on the first configuration information under the condition that the second configuration information from the network equipment is not received and the SUL carrier is configured in a service cell where the terminal equipment is located;

the second configuration information includes an uplink carrier used by the terminal device in the random access process.
The apparatus of claim 44, wherein the random access module is further configured to:

and sending the random access request to the network equipment based on the uplink carrier wave included in the second configuration information under the condition that the second configuration information from the network equipment is received.
The apparatus of claim 44 or 45, wherein the second configuration information is carried in system information; and/or, the second configuration information is carried in a broadcast message.
A random access apparatus, disposed in a network device of a non-terrestrial communication network NTN, the apparatus comprising:

The information sending module is used for sending first configuration information to the terminal equipment, wherein the first configuration information is used for determining an uplink carrier wave used in a random access process by the terminal equipment, and the uplink carrier wave comprises a normal uplink NUL carrier wave or a supplementary uplink SUL carrier wave;

and the random access module is used for receiving a random access request sent by the terminal equipment through the uplink carrier.
The apparatus of claim 47, wherein the first configuration information is carried in system information; and/or the first configuration information is carried in a broadcast message.
The apparatus of claim 47 or 48, wherein the device comprises,

the information sending module is further configured to send second configuration information to the terminal device, where the second configuration information includes an uplink carrier used by the terminal device in the random access process;

the random access module is further configured to receive a random access request sent by the terminal device through an uplink carrier included in the second configuration information.
The apparatus of claim 49, wherein the second configuration information is carried in system information; and/or, the second configuration information is carried in a broadcast message.
A terminal device, characterized in that the terminal device comprises: a processor, and a transceiver coupled to the processor; wherein:

the transceiver is configured to receive first configuration information from a network device;

the processor is configured to determine an uplink carrier used in a random access process based on the first configuration information, where the uplink carrier includes a normal uplink NUL carrier or a supplementary uplink SUL carrier;

the transceiver is configured to send a random access request to the network device based on the uplink carrier.
A network device, the network device comprising: a processor, and a transceiver coupled to the processor; wherein:

the transceiver is configured to send first configuration information to a terminal device, where the first configuration information is used for the terminal device to determine an uplink carrier used in a random access process, and the uplink carrier includes a normal uplink NUL carrier or a supplementary uplink SUL carrier;

the transceiver is further configured to receive a random access request sent by the terminal device through the uplink carrier.
A computer readable storage medium, characterized in that the storage medium has stored therein a computer program for execution by a processor of a terminal device for implementing the random access method according to any of claims 1 to 21.
A computer readable storage medium, characterized in that the storage medium has stored therein a computer program for execution by a processor of a network device for implementing the random access method according to any of claims 22 to 25.