Access method, data transmission method, equipment and storage medium

Abstract

The invention discloses an access method, a data transmission method, equipment and a storage medium. The method comprises the following steps: receiving first information sent by network equipment of a non-terrestrial access network; determining a target access network type based on the first information or the paging occasion type; the target access network type is a non-ground access network or a ground access network; and initiating an access process to the network device of the target access network type. According to the scheme of the invention, the terminal equipment can determine the target access network type needing to be accessed, so that the terminal equipment can be accessed to the space-ground integrated network by accessing the network of the target access network type.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to an access method, a data transmission method, a device and a storage medium. BACKGROUND

[0002] Future mobile communication networks are composed of ground access networks and non-ground access networks, and the ground access networks and the non-ground access networks can constitute a space-ground integrated network. In a scenario where the ground access networks and the non-ground access networks coexist, in order to save the energy consumption of the base stations in the ground access networks, the non-ground access networks can be used to undertake the paging function of the ground access networks and the non-ground access networks, that is, the terminal device only receives the paging message through the non-ground access networks. In this scenario, after the terminal device receives the paging information, how to access the network for data transmission is a problem to be solved. SUMMARY

[0003] The problem solved by the embodiments of the present application is how the terminal device accesses the network for data transmission in a scenario where the ground access networks and the non-ground access networks coexist.

[0004] The embodiments of the present application provide an access method, which is applied to a terminal device, and the method comprises the following steps:

[0005] receiving first information sent by a network device of a non-ground access network;

[0006] determining a target access network type based on the first information or a paging occasion type; the target access network type is a non-ground access network or a ground access network;

[0007] initiating an access process to a network device of the target access network type.

[0008] In this implementation manner, since the terminal device can determine the target access network type based on the received first information, the terminal device can determine the target access network type and initiate the access process to the network device of the target access network type, so that the terminal device accesses the network for the data transmission process.

[0009] Optionally, the receiving of the first information sent by the network device of the non-ground access network comprises the following steps:

[0010] receiving a wake-up signal sent by the network device of the non-ground access network; the wake-up signal carries the first information.

[0011] In this implementation manner, since the wake-up signal carries the first information, the terminal device can determine the target access network type after receiving the wake-up signal.

[0012] Optionally, receiving the first information sent by the network device in the non-terrestrial access network includes:

[0013] Receive a paging message sent by the network device of the non-terrestrial access network; the paging message carries the first information.

[0014] In this implementation, since the paging message carries the first information, the terminal device can determine the target access network type after receiving the paging message.

[0015] Optionally, receiving the first information sent by the network device in the non-terrestrial access network includes:

[0016] The network receives paging downlink control information sent by the non-terrestrial access network device; the paging downlink control information carries the first information.

[0017] In this implementation, since the paging downlink control information carries the first information, the terminal device can determine the target access network type after receiving the paging downlink control information.

[0018] Optionally, the first information includes: a network type indicator bit field, the network type indicator bit field containing at least one bit, the value of the at least one bit being used to indicate the target access network type.

[0019] In this implementation, by setting bits in the first information to determine the target access network type, the terminal device can determine the target access network type after receiving the first information.

[0020] Optionally, determining the target access network type based on the paging timing type includes:

[0021] The target access network type is determined based on the paging timing type of the received paging downlink control information.

[0022] In this implementation, the terminal device determines the target access network type based on the paging timing type of the first information.

[0023] Optionally, the paging timing type includes a first paging timing and / or a second paging timing; the target access network type of the first paging timing is the terrestrial access network; and the target access network type of the second paging timing is the non-terrestrial access network.

[0024] In this implementation, since different paging timing types correspond to different target access network types, the terminal device can determine the target access network type based on the paging timing type.

[0025] Optionally, the method further includes: receiving a first paging parameter and a second paging parameter configured by a non-terrestrial access network; the first paging parameter indicating the first paging timing; and the second paging parameter indicating the second paging timing.

[0026] In this implementation, the paging parameters correspond to the paging timing, so the paging timing type corresponding to the first information can be determined by determining the paging parameters.

[0027] Optionally, the method further includes:

[0028] The system receives a first paging parameter and a time offset configured for a non-terrestrial access network, wherein the time offset is the time interval between the first paging timing and the second paging timing; the first paging parameter indicates the first paging timing, and the second paging timing is determined based on the first paging timing and the time offset.

[0029] In this implementation, there is a time offset between the first paging timing and the second paging timing, so that after determining the first paging timing based on the first paging parameters, the second paging timing can be further determined based on the first paging timing and the time offset.

[0030] Optionally, the method further includes:

[0031] The system receives a second paging parameter and a time offset configured by a non-terrestrial access network, the time offset being the time interval between the second paging timing and the first paging timing; the second paging parameter indicates the second paging timing, and the first paging timing is determined based on the second paging timing and the time offset.

[0032] In this implementation, there is a time offset between the first paging timing and the second paging timing, so that after determining the second paging timing based on the second paging parameters, the first paging timing can be further determined based on the second paging timing and the time offset.

[0033] Optionally, the first paging opportunity and the second paging opportunity are located within one paging cycle.

[0034] In this implementation, since the first paging opportunity and the second paging opportunity are within the same paging cycle, and the interval between the first paging opportunity and the second paging time is small, the time offset is small, thereby reducing the computational load of determining the second paging opportunity based on the first paging opportunity and the time offset.

[0035] This invention also provides an access method, which is applied to network devices accessing non-terrestrial networks, the method comprising:

[0036] A first message is sent to the terminal device; the first message is used to indicate the target access network type of the terminal device; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0037] When the target access network type determined by the terminal device based on the first information or paging timing type is the non-terrestrial access network, the terminal device initiates a random access procedure to the network device of the non-terrestrial access network.

[0038] In this implementation, the network device of the non-terrestrial access network sends a first message to the terminal device so that the terminal device can determine the target access network type. When the target access network type is a non-terrestrial access network, the terminal device accesses the network and performs data transmission.

[0039] This invention also provides a data transmission method, the method comprising:

[0040] Obtain configuration information, which includes: additional scheduling delay;

[0041] The scheduling delay of the data channel or the start time position of data channel transmission is determined based on the additional scheduling delay. The data channel transmission includes uplink data transmission or sidelink data transmission.

[0042] In this implementation, due to the large propagation delay between the terminal device and the base station, the terminal device needs to apply a large timing advance when sending uplink data to the base station. Therefore, an additional scheduling delay is required to obtain the scheduling delay of the data channel or the start time position of the data channel transmission.

[0043] Optional,

[0044] The scheduling delay of the data channel is the scheduling delay of the physical side cross-link shared channel. The scheduling delay of the physical side cross-link shared channel represents the time slot offset between the time slot containing the downlink control information and the starting time slot of the physical side cross-link shared channel resource. The downlink control information is used to schedule the physical side cross-link shared channel resource, and the scheduling delay of the physical side cross-link shared channel is... Wherein, m is the scheduling delay value indicated by the downlink control information. This indicates rounding up, where K_offset represents the additional scheduling delay.

[0045] Optional,

[0046] The scheduling delay of the data channel is the scheduling delay of the physical uplink control channel. The scheduling delay of the physical uplink control channel is the time slot offset between the time slot where the physical side downlink feedback channel resource is located and the time slot where the physical uplink control channel resource is located. The scheduling delay of the physical uplink control channel is x + K_offset, where x is the scheduling delay value indicated by the downlink control information and K_offset is the additional scheduling delay.

[0047] Optionally, the method further includes:

[0048] The data channel transmission start time position is the physical side link shared channel transmission start time position, and the physical side link shared channel transmission start time position is not earlier than the first time.

[0049] Optionally, the first time is Wherein, the T DL To determine the start time position of the time slot containing the downlink control information of the physical side cross-link shared channel resources transmitted by the physical side cross-link shared channel, the T... TA This refers to the uplink timing advance for uplink transmission, where Ts lot is the time length of the time slot. This indicates rounding up, where K_offset represents the additional scheduling delay.

[0050] Optionally, the configuration information further includes: the downlink media access control sublayer control unit activation delay; the data channel scheduling delay is the physical side link shared channel scheduling delay, whereby the physical side link shared channel scheduling delay represents the time slot offset between the time slot where the downlink control information is located and the starting time slot of the physical side link shared channel resource, the downlink control information is used to schedule the physical side link shared channel resource, and the physical side link shared channel scheduling delay is... Wherein, m is the scheduling delay value indicated by the downlink control information. This indicates rounding up. K_offset is the additional scheduling delay, and K_mac is the downlink media access control sublayer control unit activation delay.

[0051] Optionally, the method further includes:

[0052] The data channel transmission start time position is the same as the physical side link shared channel transmission start time position, and the physical side link shared channel transmission start time position is no earlier than the second time.

[0053] Optionally, the second time is T. DL -(T TA / 2+f(K_mac) / 2)+(m+(K_offset+K_mac) / 2)×Tslot; where T DL To determine the start time position of the time slot containing the downlink control information of the physical side cross-link shared channel resources transmitted by the physical side cross-link shared channel, the T... TA The uplink timing advance is the uplink transmission advance, where Ts lot is the time length of the time slot, f is a function that converts the unit of K_mac to the time unit corresponding to the timing advance, K_offset is the additional scheduling delay, m is the scheduling delay value indicated by the downlink control information, and K_mac is the downlink media access control sublayer control unit activation delay.

[0054] This invention also provides a terminal device, the terminal device comprising:

[0055] The receiving module is used to receive the first information sent by network devices in non-terrestrial access networks;

[0056] The target access network type determination module is used to determine the target access network type based on the first information or the paging timing type; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0057] The access module is used to initiate an access process to a network device of the target access network type.

[0058] This invention also provides a network device for a non-terrestrial access network, the network device for the non-terrestrial access network comprising:

[0059] A sending module is used to send a first message to a terminal device; the first message is used to indicate the target access network type of the terminal device; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0060] The access module is used to initiate a random access procedure to the network device of the non-terrestrial access network when the target access network type determined by the terminal device based on the first information or paging timing type is the non-terrestrial access network.

[0061] This invention also provides a data transmission apparatus, the apparatus comprising:

[0062] The acquisition module is used to acquire configuration information, which includes: additional scheduling delay;

[0063] The determination module is used to determine the scheduling delay of the data channel or the start time position of data channel transmission based on the scheduling delay, wherein the data transmission includes uplink data transmission or sidelink data transmission.

[0064] This invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, and which, when executed by a processor, performs the steps of any of the methods described above. Attached Figure Description

[0065] Figure 1 This is a flowchart illustrating an access method provided in an embodiment of the present invention;

[0066] Figure 2 This is a flowchart illustrating the access method based on a wake-up signal provided in an embodiment of the present invention;

[0067] Figure 3 This is a flowchart illustrating the access method based on paging messages provided in an embodiment of the present invention;

[0068] Figure 4 This is a flowchart illustrating the access method based on paging downlink control information provided in an embodiment of the present invention;

[0069] Figure 5 This is a schematic diagram of the first paging timing and the second paging timing within the same paging cycle provided in an embodiment of the present invention;

[0070] Figure 6 This is a schematic diagram of adjacent first paging opportunities and second paging opportunities provided in an embodiment of the present invention;

[0071] Figure 7 This is a schematic diagram of the first paging timing and the second paging timing located in different paging cycles provided in the embodiments of the present invention;

[0072] Figure 8 This is a flowchart illustrating another access method provided in an embodiment of the present invention;

[0073] Figure 9 This is a flowchart illustrating a data transmission method provided in an embodiment of the present invention;

[0074] Figure 10 This is a schematic diagram of the scheduling delay of the physical side cross-link shared channel provided in an embodiment of the present invention;

[0075] Figure 11 This is a schematic diagram of a non-terrestrial access network cell synchronization reference point provided in an embodiment of the present invention;

[0076] Figure 12 This is a schematic diagram of the scheduling delay of the physical uplink control channel provided in an embodiment of the present invention;

[0077] Figure 13This is a schematic diagram illustrating that the physical side crosslink shared channel transmission start time position is not earlier than the first time, according to an embodiment of the present invention.

[0078] Figure 14 This is a schematic diagram of the scheduling delay of the physical side cross-link shared channel provided in an embodiment of the present invention;

[0079] Figure 15 This is a schematic diagram showing that the physical side crosslink shared channel transmission start time position is not earlier than the second time, according to an embodiment of the present invention.

[0080] Figure 16 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention;

[0081] Figure 17 This is a schematic diagram of the structure of a network device for a non-terrestrial access network provided in an embodiment of the present invention;

[0082] Figure 18 This is a schematic diagram of a data transmission device provided in an embodiment of the present invention. Detailed Implementation

[0083] In terrestrial networks, paging a terminal device requires sending a paging message within a paging tracking area. This necessitates the sending of paging messages from all ground base stations corresponding to cells within the paging tracking area, resulting in significant power consumption for the ground base stations. In integrated space-ground networks, due to the wide coverage of non-terrestrial access networks, receiving paging messages through non-terrestrial access networks avoids the need for numerous ground access network base stations to send paging messages, thus saving power consumption. In integrated space-ground networks, when non-terrestrial access networks handle paging functions for both terrestrial and non-terrestrial access networks, how the terminal device determines the required network type upon receiving a paging message is one of the problems this invention aims to solve. Furthermore, how non-terrestrial access networks allocate sidelink transmission resources is another problem this invention aims to address. To achieve energy saving for terrestrial access network equipment and efficient allocation of sidelink transmission resources for non-terrestrial access networks, this embodiment provides an access method, a data transmission method, equipment, and a storage medium. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0084] refer to Figure 1 This implementation provides an access determination method, which is applied to a terminal device and includes:

[0085] S101: Receive the first information sent by network devices in non-terrestrial access networks.

[0086] The terminal device is located within the coverage area of ​​a non-terrestrial cell, or within the dual coverage area of ​​both non-terrestrial and terrestrial cells.

[0087] Specifically, the first information or paging timing type is used to indicate the target access network type, where the paging timing type is the type of paging timing in which the received paging downlink control information is received. The target access network type is the network type that the terminal device receiving the first information needs to access.

[0088] For example, when the first information is used to indicate the target access network type, the first information carries information for indicating the target access network type, such as fields indicating the target access network type, bits, etc.

[0089] When the paging occasion type is used to indicate the target access network type, a correspondence is established between the paging occasion (PO) type and the target access network type. For example, when the paging occasion type is n1, the paging occasion type is a terrestrial access network, and when the paging occasion type is n2, the paging occasion type is a non-terrestrial access network, so as to determine the target access network type through the paging occasion type.

[0090] Furthermore, when the first information carries information indicating the target access network type, the first information can be carried on a wake-up signal, paging message, or paging downlink control information (Paging DCI) sent by a network device accessing a non-terrestrial network to a terminal device.

[0091] like Figure 2 As shown, in a specific embodiment, receiving first information sent by a network device in a non-terrestrial access network includes:

[0092] Receive a wake-up signal sent by a network device that is not connected to the terrestrial access network. This wake-up signal carries first information.

[0093] Specifically, the wake-up signal includes a network type indicator bit field, which carries first information. The network type indicator bit field contains at least one bit, and the target access network type is determined based on the bit value of the network type indicator bit field.

[0094] In one specific embodiment, the network type indicates that the bit field includes multiple bits or a common bit.

[0095] When the network type indicator bit field includes two or more bits, each bit in the network type indicator bit field corresponds to a group of terminal devices, and each bit corresponds to a different terminal device group. In this case, after a terminal device receives a wake-up signal, it determines the target access network type based on the bit value corresponding to the terminal device group to which the terminal device belongs. For example, if the network type indicator bit field in the wake-up signal contains four bits, each bit corresponds to a terminal device group: the first bit corresponds to terminal device group A, the second bit to terminal device group B, the third bit to terminal device group C, and the fourth bit to terminal device group D, and terminal device a belongs to terminal device group A, after receiving the wake-up signal, terminal device a determines the target access network type based on the bit value corresponding to terminal device group A, that is, based on the value of the first bit of the network type indicator bit field. For example, if the first bit of the network type indicator bit field is 1, it means that the target access network type that terminal device a needs to access is a non-terrestrial access network; if the first bit of the network type indicator bit field is 0, it means that the target access network type that terminal device a needs to access is a terrestrial access network.

[0096] When the network type indicator bit field includes a common bit, the terminal device, after receiving the wake-up signal, determines the target access network type based on the value of the common bit. For example, a common bit value of 1 indicates that the target access network type is a non-terrestrial access network, and a common bit value of 0 indicates that the target access network type is a terrestrial access network.

[0097] like Figure 3 As shown, in a specific embodiment, receiving first information sent by a network device in a non-terrestrial access network includes:

[0098] Receive paging messages sent by network devices that are not connected to the terrestrial network; the paging message carries the first information.

[0099] The paging message carries first information so that the terminal device can determine the target access network type after receiving the paging message.

[0100] like Figure 4 As shown, in a specific embodiment, receiving first information sent by a network device in a non-terrestrial access network includes:

[0101] Receive paging downlink control information sent by network devices in non-terrestrial access networks; the paging downlink control information carries the first information.

[0102] Specifically, the paging downlink control information includes: a network type indicator bit field, which carries first information and contains at least one bit. The target access network type is determined based on the bit values ​​of the network type indicator bit field. The correspondence between bits, target access network type, and terminal device can be found in [reference needed]. Figure 2 The corresponding implementation examples.

[0103] S102: Determine the target access network type based on the first information or paging timing type; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0104] Specifically, determining the target access network type based on the paging timing type includes the terminal device determining the target access network type based on the paging timing type of the received paging downlink control information.

[0105] The paging timing type includes a first paging timing and / or a second paging timing. The target access network type for the first paging timing is a terrestrial access network, while the target access network type for the second paging timing is a non-terrestrial access network. In other words, when the received paging downlink control information occurs during the first paging timing, the target access network type for the terminal device is a terrestrial access network. When the received paging downlink control information occurs during the second paging timing, the target access network type for the terminal device is a non-terrestrial access network.

[0106] Furthermore, the non-terrestrial access network configures the first paging parameter and the second paging parameter through system information. In a specific embodiment, the terminal device receives the first paging parameter and the second paging parameter configured by the non-terrestrial access network; determines the first paging timing based on the first paging parameter; and determines the second paging timing based on the second paging parameter.

[0107] It should be noted that the first paging parameter is used to determine the first paging timing. Specific paging parameters include: the paging cycle in which the first paging timing occurs, the paging system frame start offset, the number of paging opportunities contained in the paging frame in which the first paging timing occurs, and the number of paging frames contained within the paging cycle in which the first paging timing occurs. The second paging parameter is used to determine the second paging timing. Specific parameters include: the paging cycle in which the second paging timing occurs, the paging system frame start offset, the number of paging opportunities contained in the paging frame in which the second paging timing occurs, and the number of paging frames contained within the paging cycle in which the second paging timing occurs.

[0108] In a specific embodiment, in addition to determining the first paging timing and the second paging timing based on the first paging parameters and the second paging parameters, the first paging timing and the second paging timing can also be determined based on the first paging parameters and the time offset, specifically including:

[0109] The system receives the first paging parameters and time offset configured by the non-terrestrial access network, where the time offset is the time interval between the first paging opportunity and the second paging opportunity; it determines the first paging opportunity based on the first paging parameters, and determines the second paging opportunity based on the first paging opportunity and the time offset.

[0110] Based on its identifier, the terminal device receives the first paging parameters and time offset configured by the non-terrestrial access network. The time offset is the time interval between any point in time during the first paging event and the same point in time during the second paging event. For example, the time offset can be the time interval between the start time of the first paging event and the start time of the second paging event, or the time interval between the end time of the first paging event and the end time of the second paging event. The first paging event and the second paging event are determined using the first paging parameters and the time offset.

[0111] It should be noted that the first paging opportunity and the second paging opportunity can be within the same paging cycle, or they can be within different paging cycles.

[0112] For example, such as Figure 5 As shown, when the first paging opportunity and the second paging opportunity are within the same paging cycle, after the terminal device determines the first paging opportunity based on the first paging parameters, if the start time of the first paging opportunity is a1, the start time of the second paging opportunity is a2, the end time of the first paging opportunity is b1, and the end time of the second paging opportunity is b2, and there are two paging opportunities between the first and second paging opportunities, then the start time a1 of the first paging opportunity is added to the time interval between a1 and a2. That is, a1 is added to the time length c1 of two paging opportunities and the time interval c2 between three adjacent paging opportunities to determine the start time a2 of the second paging opportunity within the same paging cycle. Then, add the end time of the first paging opportunity to the time offset, that is, add b1 to the time interval between b1 and b2, to determine the end time b2 of the second paging opportunity within the same paging cycle. Thus, the second paging opportunity is determined by the start time a2 and the end time b2 of the second paging opportunity.

[0113] It should be noted that, as Figure 6As shown, in this embodiment, when the first paging time and the second paging time are within the same paging cycle, the second paging time can also be set as the next paging time adjacent to the first paging time, so as to reduce the time offset between the first paging time and the second paging time and reduce the amount of calculation required to determine the second paging time based on the first paging time and the time offset.

[0114] like Figure 7 As shown, when the first paging opportunity and the second paging opportunity are located within different paging cycles, after the terminal device determines the first paging opportunity based on the first paging parameters, if the start time of the first paging opportunity is a3, the start time of the second paging opportunity is a4, the end time of the first paging opportunity is b3, and the end time of the second paging opportunity is b4, and the first paging opportunity is located within the first paging cycle, while the second paging opportunity is located within the third paging cycle, then the start time a1 of the first paging opportunity is added to the time interval between a3 and a4. That is, a3 is added to the time interval from a3 to the end of the first paging cycle, the time interval of the second paging cycle, and the time interval from the beginning of the third paging cycle to a4, to determine the start time a4 of the second paging opportunity located within different paging cycles. Then, add the end time of the first paging opportunity to the time offset, that is, add the time length between b3 and b3 to b4 to determine the end time b4 of the second paging opportunity located in different paging cycles. Thus, the second paging opportunity is determined by the start time a4 and the end time b4 of the second paging opportunity.

[0115] In a specific embodiment, in addition to determining the first paging timing and the second paging timing based on the first paging parameters and the second paging parameters, and determining the first paging timing and the second paging timing based on the first paging parameters and the time offset, the first paging timing and the second paging timing can also be determined based on the second paging parameters and the time offset, specifically including:

[0116] The system receives the second paging parameters and time offset configured by the non-terrestrial access network, where the time offset is the time interval between the second paging timing and the first paging timing; it determines the second paging timing based on the second paging parameters, and determines the first paging timing based on the second paging timing and the time offset.

[0117] The terminal device can also receive the second paging parameters and time offset configured by the non-terrestrial access network based on the terminal device's identifier. The specific process for determining the first and second paging timings using the second paging parameters and time offset can be found above. Figures 5 to 7 The corresponding implementation examples.

[0118] S103: Initiate an access procedure to a network device of the target access network type.

[0119] The target access network type is the network device that is in the access network of the target access network type. Since the terminal device determines the target access network type based on the first information, the terminal device can initiate an access process to the network device of the target access network type to realize the terminal device accessing the integrated space-ground network.

[0120] like Figure 8 As shown, this embodiment provides an access method, which is applied to network devices accessing non-terrestrial networks. The method includes:

[0121] S801: Send the first message to the terminal device.

[0122] The network device of the target access network type is the network device whose access network type is the target access network type. In this embodiment, the first message can be referred to the description related to the first message in steps S101 to S103 above.

[0123] S802: When the target access network type determined by the terminal device based on the first information or paging timing type is a non-terrestrial access network, the terminal device accesses the network device of the non-terrestrial access network.

[0124] For details on how the terminal device determines the target access network type based on the first information or paging timing type, please refer to the above. Figures 1 to 7 The corresponding implementation is as follows: When it is determined that the target access network type of the terminal device is a non-terrestrial access network, the terminal device sends an access request to the network device of the non-terrestrial access network type. After receiving the access request sent by the terminal device, the network device of the non-terrestrial access network type connects the terminal device to the non-terrestrial access network.

[0125] By sending first information to the terminal device, the terminal device can determine the target access network type. When the target access network type is a non-terrestrial access network, the terminal device can access the network device of the non-terrestrial access network, thereby realizing the terminal device's access to the integrated terrestrial-space network.

[0126] like Figure 9 As shown, this embodiment provides a data transmission method, the method including:

[0127] S901: Obtain configuration information, including: additional scheduling delay.

[0128] Specifically, the network carries configuration information in higher-layer signaling and sends this higher-layer signaling to the terminal so that the terminal can obtain the configuration information. The additional scheduling delay can be either cell-level or terminal-device-level. When terminal-device-level additional scheduling delay exists, it is carried in the higher-layer signaling. When terminal-device-level additional scheduling delay does not exist, the cell-level additional scheduling delay configured through system information is carried in the higher-layer signaling.

[0129] S902: Determine the scheduling delay of the data channel or the start time position of data channel transmission based on the additional scheduling delay. Data channel transmission includes uplink data transmission or sidelink data transmission.

[0130] In sidelink communication technology, to avoid or reduce interference between terminal transmissions and base station transmissions, the uplink timing of the terminal device and the uplink timing of the base station need to be aligned to the same time reference point. Similarly, the downlink transmission timing of the terminal device and the downlink transmission timing of the base station need to be aligned to the same time reference point. Alignment of either the uplink or downlink transmission timing of the terminal device with the same time reference point can be achieved through two methods: alignment with the synchronization reference point of non-terrestrial access network cells and alignment with the transmission timing of the base station of non-terrestrial access network cells.

[0131] Specifically, such as Figure 10 As shown, when the uplink transmission timing of the terminal device, the uplink transmission timing of the base station, and the synchronization reference point of the non-terrestrial access network cell are aligned, the scheduling delay of the data channel can be determined based on the additional scheduling delay, specifically including:

[0132] The scheduling delay of the data channel is the scheduling delay of the Physical Sidelink Shared Channel (PSSCH). The PSSCH scheduling delay represents the time slot offset between the time slot containing the downlink control information and the starting time slot of the PSSCH resource. The downlink control information is used to schedule the PSSCH resource. Where m is the scheduling delay value indicated by the downlink control information. This indicates rounding up, and K_offset represents the additional scheduling delay.

[0133] After determining the scheduling delay of the data channel, the scheduling delay of the data channel can be added to the time slot where the downlink control information is located to determine the start time of data channel transmission. For example, if the time slot where the downlink control information is located is time slot 5, and the scheduling delay value indicated by the downlink control information is 2, and the additional scheduling delay is 5, then the scheduling delay of the physical side link-shared channel is: The starting time slot for the physical side link shared channel transmission scheduled by this DCI is time slot 10.

[0134] The cell synchronization reference point for non-terrestrial access networks can be located anywhere on the transmission link from the terminal device to the ground base station. For example, Figure 11 As shown, taking terminal equipment, base station and satellite as examples, the synchronization reference point of non-terrestrial access network cell can be set between satellite and base station. K_mac is the downlink media access control sublayer control unit activation delay, which is the round-trip time (RTT) between the non-terrestrial access network cell synchronization reference point and base station. The unit of K_mac is time slot or subframe.

[0135] Specifically, such as Figure 12 As shown, when the downlink transmission timing of the terminal device, the downlink transmission timing of the base station, and the synchronization reference point of the non-terrestrial access network cell are aligned, the scheduling delay of the data channel is determined based on the additional scheduling delay, specifically including:

[0136] The scheduling delay of the data channel is the scheduling delay of the Physical Uplink Control Channel (PUCCH). The scheduling delay of the Physical Uplink Control Channel is the time slot offset between the time slot where the Physical Sidelink Feedback Channel (PSFCH) resource is located and the time slot where the Physical Uplink Control Channel resource is located. The scheduling delay of the Physical Uplink Control Channel is x + K_offset, where x is the scheduling delay value between the PUCCH and PSFCH indicated by the downlink control information, and K_offset is the additional scheduling delay.

[0137] For example, if the physical side downlink shared channel transmission scheduled by the downlink control information is located in time slot 5, and the scheduling delay between the PUCCH resource and the PSFCH resource indicated by the downlink control information is 2, and the additional scheduling delay is 2, then the scheduling delay of the physical uplink control channel is 4 time slots, that is, the starting time slot of the PUCCH resource is time slot 9.

[0138] Furthermore, when aligning the uplink transmission timing of the terminal device, the uplink transmission timing of the base station, and the synchronization reference point of the non-terrestrial access network cell, it also includes:

[0139] The data channel transmission start time position is the same as the physical side link shared channel transmission start time position, and the physical side link shared channel transmission start time position is no earlier than the first time.

[0140] Specifically, such as Figure 13 As shown, the first time T1 is Among them, T DL To determine the start time position of the time slot containing the downlink control information for the physical side cross-link shared channel resources transmitted via the physical side cross-link shared channel, T TA Ts_lo_ot is the uplink timing advance for uplink transmission, where Ts_lo_ot is the time slot length. This indicates rounding up, and K_offset represents the additional scheduling delay.

[0141] For example, when the starting time position of the time slot containing the downlink control information is T DL If the uplink timing advance is 1500 microseconds (µs), the downlink control information indicates a scheduling delay of 3 time slots, the additional scheduling delay is 4 time slots, and the time slot length is 1 millisecond (1000 microseconds), then the first time is T. DL -(1500+(3+2)×1000)us is T DL +3500us.

[0142] Specifically, such as Figure 14 As shown, when the uplink transmission timing of the terminal device, the uplink transmission timing of the base station, and the transmission timing of the base station in the non-terrestrial access network cell are aligned, the scheduling delay of the data signal can be determined based on the additional scheduling delay and the effective delay of the downlink media access control sublayer control unit. Specifically, this includes:

[0143] The scheduling delay of the data channel is the scheduling delay of the physical side link shared channel. The scheduling delay of the physical side link shared channel represents the time slot offset between the time slot containing the downlink control information and the starting time slot of the physical side link shared channel resource. The downlink control information is used to schedule the physical side link shared channel resource. The scheduling delay of the physical side link shared channel is... Where m is the scheduling delay value indicated by the downlink control information. This indicates rounding up. K_offset represents the additional scheduling delay, and K_mac represents the activation delay of the downlink media access control sublayer control unit.

[0144] For example, if the downlink control information is located in time slot 5, and the scheduling delay indicated by the downlink control information is 2 time slots, the additional scheduling delay is 5 time slots, and the downlink media access control sublayer control unit activation delay is 3 time slots, then the scheduling delay of the physical side downlink shared channel is: The starting time slot for the physical side link shared channel transmission resources scheduled by the downlink control information is time slot 11.

[0145] It should be noted that the process for determining the data channel scheduling delay based on the additional scheduling delay when the uplink transmission timing of the terminal device, the uplink transmission timing of the base station, and the transmission timing of the base station in the non-terrestrial access network cell are aligned is the same as the process for determining the data channel scheduling delay based on the additional scheduling delay when the downlink transmission timing of the terminal device, the downlink transmission timing of the base station, and the synchronization reference point of the non-terrestrial access network cell are aligned. For specific procedures, please refer to the above. Figure 12 Corresponding implementation examples.

[0146] Furthermore, when aligning the uplink transmission timing of the terminal device, the uplink transmission timing of the base station, and the transmission timing of the non-terrestrial access network cell base station, it also includes:

[0147] The data channel transmission start time position is the same as the physical side link shared channel transmission start time position, and the physical side link shared channel transmission start time position is no earlier than the second time.

[0148] Specifically, such as Figure 15 As shown, the second time T2 is T DL -(T TA / 2+f(K_mac) / 2)+(m+(K_offset+K_mac) / 2)×Ts lot; where T DL To determine the start time position of the time slot containing the downlink control information for the physical side cross-link shared channel resources transmitted via the physical side cross-link shared channel, T TA For uplink transmission, Ts_lot is the uplink timing advance, Ts_lot is the time length of the time slot, f is the function to convert the unit of K_mac to the time unit corresponding to the timing advance, K_offset is the additional scheduling delay, m is the scheduling delay value indicated by the downlink control information, and K_mac is the downlink media access control sublayer control unit activation delay.

[0149] For example, when the starting time position of the time slot containing the downlink control information is T DL If the uplink timing advance is 8000µs, the downlink control information indicates a scheduling delay of 3 time slots, the additional scheduling delay is 4 time slots, the time slot length is 1 millisecond (i.e., 1000µs), and the downlink media access control sublayer control unit activation delay is 5 time slots, then the second time is: T DL -(800 / 2+f(5) / 2)+(3+(4+5) / 2)×1000us, i.e. T DL +4600us.

[0150] Because of the significant propagation delay between the terminal device and the base station, the terminal device needs to apply a large timing advance when sending uplink data to the base station. Therefore, an additional scheduling delay is required to obtain the scheduling delay of the data channel or the start time position of the data channel transmission.

[0151] like Figure 16 As shown, this embodiment provides a terminal device, which includes:

[0152] Receiver module 1601 is used to receive first information sent by network devices in non-terrestrial access networks;

[0153] The target access network type determination module 1602 is used to determine the target access network type based on the first information; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0154] Access module 1603 is used to initiate an access process to a network device of the target access network type.

[0155] like Figure 17 As shown, this embodiment provides a non-terrestrial access network device, which includes:

[0156] The sending module 1701 is used to send a first message to the terminal device; the first message is used to indicate the target access network type of the terminal device; the target access network type is a non-terrestrial access network or a terrestrial access network.

[0157] Access module 1702 is used to initiate a random access process to a network device in a non-terrestrial access network when the target access network type of the terminal device is a non-terrestrial access network.

[0158] like Figure 18 As shown, this embodiment provides a data transmission apparatus, the apparatus comprising:

[0159] The acquisition module 1801 is used to acquire configuration information, which includes: additional scheduling delay and downlink media access control sublayer control unit activation delay;

[0160] The determination module 1802 is used to determine the scheduling delay of the data channel or the start time position of the data channel transmission based on the configuration information. The data channel transmission includes uplink data transmission or sidelink data transmission.

[0161] In specific implementation, the modules / units included in the various devices and products described in the above embodiments can be software modules / units, hardware modules / units, or a combination of both.

[0162] For example, for various devices and products applied to or integrated into a chip, each module / unit can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, each module / unit can be implemented using hardware methods such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0163] This invention also provides a computer-readable storage medium, which is a non-volatile or non-transitory storage medium storing a computer program. When a processor executes the computer program, it performs the steps of the access method provided in any of the above embodiments. Preferably, the storage medium may include a computer-readable storage medium such as non-volatile or non-transitory memory. The storage medium may include ROM, RAM, a magnetic disk, or an optical disk, etc.

[0164] This invention also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the access method provided in the above embodiments.

[0165] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include ROM, RAM, disk, or optical disk, etc.

[0166] This technical solution is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, and Vehicle-to-Everything (V2X) architecture.

[0167] The UE in this embodiment of the invention is a device with wireless communication capabilities, which may be referred to as a terminal, terminal equipment, mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, wireless communication equipment, UE agent, or UE device, etc. The UE can be fixed or mobile. It should be noted that the UE can support at least one wireless communication technology, such as Long Term Evolution (LTE) or New Radio (NR). For example, a UE can be a mobile phone, tablet, desktop computer, laptop computer, all-in-one computer, in-vehicle terminal, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, wearable device, terminal device in future mobile communication networks, or terminal device in future evolved public land mobile network (PLMN), etc. In some embodiments of this application, the terminal device may also be a device with transceiver functions, such as a chip system. The chip system may include a chip, and may also include other discrete components.

[0168] In this embodiment of the invention, the network device is a device that provides wireless communication functions for the UE, and may also be referred to as an access network device, radio access network (RAN) device, or access network element. The network device can support at least one wireless communication technology, such as LTE or NR. For example, the network device includes, but is not limited to: next-generation node B (gNB), evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home-evolved node B or home node B, HNB), baseband unit (BBU), transmitting and receiving point (TRP), transmitting point (TP), mobile switching center, etc., in a 5th-generation mobile communication system (5G). Network devices can also be radio controllers, centralized units (CUs), and / or distributed units (DUs) in cloud radio access network (CRAN) scenarios, or access network devices can be relay stations, access points, vehicle-mounted devices, terminal devices, wearable devices, and network devices in future mobile communications or future evolved PLMNs. In some embodiments, network devices can also be means for providing wireless communication functions to UEs, such as chip systems. For example, a chip system may include chips, and may also include other discrete components.

[0169] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0170] In the embodiments of this invention, "multiple" refers to two or more.

[0171] The descriptions of "first," "second," etc., appearing in the embodiments of this invention are for illustrative purposes and to distinguish the objects being described. They do not indicate any particular order and do not imply any special limitation on the number of devices in the embodiments of this invention. They do not constitute any limitation on the embodiments of this invention.

[0172] In this embodiment of the invention, "connection" refers to various connection methods, such as direct or indirect connection, to achieve communication between devices. This embodiment of the invention does not impose any limitations on this. In this embodiment of the invention, "network" and "system" refer to the same concept; a communication system is a communication network.

[0173] It should be understood that in this embodiment of the invention, the processor can be a central processing unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0174] It should also be understood that the memory in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0175] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0176] It should be understood that, in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this invention.

[0177] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An access method, characterized by, The method is applied to a terminal device, and the method comprises: receiving first information sent by a network device of a non-ground access network; determining a target access network type based on the first information or a paging occasion type; the target access network type is a non-ground access network or a ground access network; initiating an access procedure to a network device of the target access network type.

2. The method of claim 1, wherein, The receiving of the first information sent by the network device of the non-ground access network comprises: receiving a wake-up signal sent by the network device of the non-ground access network; the wake-up signal carries the first information.

3. The method of claim 1, wherein, The receiving of the first information sent by the network device of the non-ground access network comprises: receiving a paging message sent by the network device of the non-ground access network; the paging message carries the first information.

4. The method of claim 1, wherein, The receiving of the first information sent by the network device of the non-ground access network comprises: receiving a paging downlink control information sent by the network device of the non-ground access network; the paging downlink control information carries the first information.

5. The method of claim 1, wherein, The first information comprises a network type indication bit field, the network type indication bit field contains at least one bit, and a value of the at least one bit is used to indicate the target access network type.

6. The method of claim 1, wherein, The determining of the target access network type based on the paging occasion type comprises: determining the target access network type based on a paging occasion type in which the received paging downlink control information is located.

7. The method of claim 6, wherein, The paging occasion type comprises a first paging occasion and / or a second paging occasion; the target access network type of the first paging occasion is the ground access network; and the target access network type of the second paging occasion is the non-ground access network.

8. The method of claim 7, wherein, The method further comprises: receiving first paging parameters and second paging parameters configured by the non-ground access network; the first paging parameters indicate the first paging occasion; and the second paging parameters indicate the second paging occasion.

9. The method of claim 7, wherein, The method further comprises: receiving first paging parameters and a time offset configured by the non-ground access network; the time offset is a time interval between the first paging occasion and the second paging occasion; the first paging parameters indicate the first paging occasion, and the second paging occasion is determined based on the first paging occasion and the time offset.

10. The method of claim 7, wherein, The method further comprises: receiving second paging parameters and a time offset configured by the non-ground access network; the time offset is a time interval between the second paging occasion and the first paging occasion; the second paging parameters indicate the second paging occasion, and the first paging occasion is determined based on the second paging occasion and the time offset.

11. The method of claim 7, wherein, The first paging occasion and the second paging occasion are located in one paging cycle.

12. An access method, characterized by, The method is applied to a network device of a non-ground access network, and the method comprises: sending first information to a terminal device; the first information is used to indicate a target access network type of the terminal device; and the target access network type is a non-ground access network or a ground access network. When the terminal device determines the target access network type based on the first information or the paging occasion type to be the non-terrestrial access network, the terminal device initiates a random access procedure to the network device of the non-terrestrial access network.

13. A data transmission method, characterized by, The method comprises: obtaining configuration information, wherein the configuration information comprises an additional scheduling delay; determining a scheduling delay of a data channel or a starting time position of data channel transmission based on the additional scheduling delay, wherein the data channel transmission comprises uplink data transmission or sidelink data transmission.

14. The method of claim 13, wherein, The scheduling delay of the data channel is a scheduling delay of a physical sidelink shared channel, the scheduling delay of the physical sidelink shared channel represents a time slot offset between a time slot where downlink control information is located and a starting time slot of a physical sidelink shared channel resource, the downlink control information is used for scheduling the physical sidelink shared channel resource, and the scheduling delay of the physical sidelink shared channel is wherein the m is a scheduling delay value indicated by the downlink control information, denotes rounding up, and the K_offset is the additional scheduling delay.

15. The method of claim 13, wherein, The scheduling delay of the data channel is a scheduling delay of a physical uplink control channel, and the scheduling delay of the physical uplink control channel is a time slot offset between a time slot where a physical sidelink feedback channel resource is located and a time slot where a physical uplink control channel resource is located, and the scheduling delay of the physical uplink control channel is x+K_offset, wherein x is a scheduling delay value indicated by downlink control information, and K_offset is the additional scheduling delay.

16. The method of claim 13, wherein, The method further comprises that the starting time position of the data channel transmission is a starting time position of physical sidelink shared channel transmission, and the starting time position of the physical sidelink shared channel transmission is not earlier than a first time.

17. The method of claim 16, wherein, The first time is Wherein, the T DL is a time position of a slot where downlink control information of a physical sidelink shared channel resource scheduled by the physical sidelink shared channel is located, the T TA is an uplink timing advance amount of uplink transmission, and the T represents rounding up, and the K_offset is the additional scheduling delay.

18. The method of claim 13, wherein, The configuration information further includes: a downlink media access control sublayer control element taking effect delay; and a scheduling delay of the data channel is a scheduling delay of a physical sidelink shared channel, the scheduling delay of the physical sidelink shared channel representing a time slot offset between a time slot where downlink control information is located and a starting time slot of a physical sidelink shared channel resource, the downlink control information being used for scheduling the physical sidelink shared channel resource, and the scheduling delay of the physical sidelink shared channel being wherein the m is a scheduling delay value indicated by the downlink control information, denoting rounding up, the K_offset being the additional scheduling delay, and the K_mac being a downlink media access control sublayer control element taking effect delay.

19. The method of claim 13, wherein, The method further comprises that the starting time position of the data channel transmission is a starting time position of physical sidelink shared channel transmission, and the starting time position of the physical sidelink shared channel transmission is not earlier than a second time.

20. The method of claim 19, wherein, The second time is T DL -(T TA / 2+f(K_mac) / 2)+(m+(K_offset+K_mac) / 2)×Tslot; wherein, the T DL is a time position of a slot where downlink control information of a physical sidelink shared channel resource scheduling the physical sidelink shared channel transmission is located, the T TA is an uplink timing advance amount of uplink transmission, the Tslot is a time length of a slot, the f is a function of converting a unit of K_mac into a time unit corresponding to a timing advance amount, the K_offset is the additional scheduling delay, the m is a scheduling delay value indicated by the downlink control information, and the K_mac is a downlink medium access control sublayer control unit validity delay.

21. A terminal device, comprising: The terminal device comprises: a receiving module configured to receive first information sent by a network device of a non-terrestrial access network; a target access network type determination module configured to determine a target access network type based on the first information or a paging occasion type, wherein the target access network type is a non-terrestrial access network or a terrestrial access network; an access module configured to initiate an access procedure to a network device of the target access network type.

22. A network device of a non-terrestrial access network, the network device comprising: The network device of the non-terrestrial access network comprises: a sending module configured to send first information to a terminal device, wherein the first information is used to indicate a target access network type of the terminal device, and the target access network type is a non-terrestrial access network or a terrestrial access network; an access module configured to initiate a random access procedure by the terminal device to the network device of the non-terrestrial access network when the terminal device determines the target access network type based on the first information or the paging occasion type to be the non-terrestrial access network.

23. An apparatus for data transmission, the apparatus comprising: The apparatus comprises: an obtaining module configured to obtain configuration information, wherein the configuration information comprises an additional scheduling delay; a determining module configured to determine a scheduling delay of a data channel or a starting time position of data channel transmission based on the scheduling delay, wherein the data channel transmission comprises uplink data transmission or sidelink data transmission.

24. A computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, characterized by The computer program is run by a processor to perform the steps of the method of any one of claims 1 to 11 or 12 or 13 to 20.

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