WO2021168702A1 - 一种随机接入的方法、网络设备及终端设备 - Google Patents

一种随机接入的方法、网络设备及终端设备 Download PDF

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Publication number
WO2021168702A1
WO2021168702A1 PCT/CN2020/076826 CN2020076826W WO2021168702A1 WO 2021168702 A1 WO2021168702 A1 WO 2021168702A1 CN 2020076826 W CN2020076826 W CN 2020076826W WO 2021168702 A1 WO2021168702 A1 WO 2021168702A1
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Prior art keywords
compensation
terminal device
random access
indication
network device
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PCT/CN2020/076826
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English (en)
French (fr)
Inventor
付喆
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202080080132.3A priority Critical patent/CN114731708A/zh
Priority to PCT/CN2020/076826 priority patent/WO2021168702A1/zh
Publication of WO2021168702A1 publication Critical patent/WO2021168702A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications, and in particular to a random access method, network equipment and terminal equipment.
  • NTN Non Terrestrial Network
  • satellite communication is not restricted by the user area. For example, general terrestrial communication cannot cover the ocean, mountains, deserts and other areas where communication equipment cannot be installed or because of the sparse population. Satellites can cover a larger ground, and satellites can orbit the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has greater social value.
  • Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed areas and promoting The development of these areas.
  • the satellite communication distance is long, and the communication distance increases and the cost of communication does not increase significantly.
  • the stability of satellite communication is high, and it is not restricted by natural disasters.
  • the NTN system supports two types of terminals with and without TA compensation capability.
  • the random access process is different.
  • the network needs to maintain different preamble (preamble) receiving windows and send RAR (Random Access Response) in different formats. , The use of different scheduling strategies, etc., these will increase the complexity of network implementation.
  • the embodiments of this application provide a random access method, network equipment, and terminal equipment, which are used by the network equipment to control the random access behavior of the terminal according to its own implementation, so that the behavior of the terminal equipment conforms to the actual situation on the network side. .
  • the first aspect of the embodiments of the present invention provides a random access method, including: a terminal device receives instruction information sent by a network device, the instruction information is used to indicate whether the terminal device performs timing advance TA compensation; according to the instruction information, the The terminal device determines the TA compensation result, and sends a random access request to the network device through the TA compensation result.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • determining the TA compensation result by the terminal device according to the indication information includes: in a case where the indication information is indication information for deactivating TA compensation, the terminal device determines not to Perform TA compensation.
  • determining the TA compensation result by the terminal device according to the indication information includes: in a case where the indication information is indication information for activating TA compensation, the terminal device according to the terminal The compensation capability of the equipment determines the TA compensation result.
  • the terminal device determines the TA compensation result according to the compensation capability of the terminal device, including: If the terminal device has the compensation capability, the terminal device performs TA compensation; if the terminal device does not have the compensation capability, the terminal device does not perform TA compensation.
  • the terminal device performing TA compensation includes: the terminal device determines the estimated TA result according to the position of the terminal device and the satellite position.
  • the sending a random access request to the network device based on the TA compensation result includes: in the case that the terminal device has the compensation capability, the terminal device is based on the estimated The TA sends the random access request as a result; in the case that the terminal device does not have the compensation capability, the terminal device uses the uplink timing aligned with the downlink timing to send the random access request.
  • the instruction message if the instruction message includes a preset identifier, the instruction message is the instruction information for activating TA compensation; if the instruction message does not include the preset identifier, the instruction message Instructions for deactivating TA compensation.
  • the indication message includes a 1-bit indication field; when the 1-bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1-bit indication field is 0 , The instruction message is the instruction information for deactivating TA compensation.
  • the terminal device receiving the instruction information sent by the network device includes: the terminal device receives the instruction information sent by the network device through broadcast, unicast, or multicast.
  • the method further includes: the terminal device receives the random access request sent by the network device according to the random access request. Random access response.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • the second aspect of the embodiments of the present application provides a random access method, including: a network device sends instruction information to a terminal device, the instruction information is used to indicate whether the terminal device performs timing advance TA compensation; the network device receives the terminal device For the random access request sent through the TA compensation result, the TA compensation result is determined by the terminal device according to the indication information.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the instruction message if the instruction message includes a preset identifier, the instruction message is the instruction information for activating TA compensation; if the instruction message does not include the preset identifier, the instruction message Instructions for deactivating TA compensation.
  • the indication message includes a 1-bit indication field; when the 1-bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1-bit indication field is 0 , The instruction message is the instruction information for deactivating TA compensation.
  • the network device receiving the random access request sent by the terminal device includes: the network device uses the first receiving The window receives the random access request sent by the terminal device to the network device using the estimated TA result, and the estimated TA result is calculated based on the terminal device's position and satellite position when the terminal device has the compensation capability owned.
  • the network device receiving the random access request sent by the terminal device includes: the network device uses the second The receiving window receives the random access request sent by the terminal device to the network device using the uplink timing aligned with the downlink timing according to the instruction information of the deactivation TA compensation.
  • the window length of the first receiving window is smaller than the window length of the second receiving window.
  • the network device sending instruction information to the terminal device includes: the network device sending instruction information to the terminal device by means of broadcast, unicast or multicast.
  • the method further includes: the network device sends the random access request to the terminal according to the random access request.
  • the device sends a random access response.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • the third aspect of the embodiments of the present invention provides a terminal device, which has a function that the network device can control the random access behavior of the terminal according to its own implementation situation, so that the behavior of the terminal device conforms to the actual situation on the network side.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the fourth aspect of the embodiments of the present invention provides a network device, which can control the random access behavior of the terminal according to its own implementation situation, so that the behavior of the terminal device conforms to the function of the actual situation on the network side.
  • This function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • a fifth aspect of the present invention provides a terminal device, including:
  • a receiver, a processor, and a transmitter where the receiver, the processor, and the transmitter are connected by a bus;
  • the receiver is configured to receive instruction information sent by a network device, where the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the processor is configured to determine the TA compensation result by the terminal device according to the instruction information
  • the transmitter is configured to send a random access request to the network device through the TA compensation result.
  • a sixth aspect of the present invention provides a network device, including:
  • a receiver and a transmitter, the receiver and the transmitter are connected by a bus;
  • the transmitter is configured to send instruction information to a terminal device, where the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the receiver is configured to receive the random access request sent by the terminal device through a TA compensation result, where the TA compensation result is determined by the terminal device according to the indication information.
  • the seventh aspect of the present invention provides a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the first aspect and any one of the optional implementations of the first aspect of the present invention or the second aspect of the present invention. Aspect and the method described in any optional implementation manner of the second aspect.
  • the eighth aspect of the present invention provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the first aspect and any one of the optional implementations of the first aspect of the present invention or the second aspect and the second aspect of the present invention. The method described in any optional implementation of the second aspect.
  • a ninth aspect of the present invention provides a chip, which is coupled with a memory in the terminal device, so that the chip invokes program instructions stored in the memory during operation, so that the terminal device executes the The method described in one aspect and any optional implementation of the first aspect.
  • the tenth aspect of the present invention provides a chip, which is coupled with a memory in the network device, so that the chip calls the program instructions stored in the memory during operation, so that the network device executes The method described in the second aspect and any optional implementation of the second aspect.
  • the terminal device receives the instruction information sent by the network device, and the instruction information is used to indicate whether the terminal device performs timing advance TA compensation; according to the instruction information, the terminal device determines the TA Compensate the result, and send a random access request to the network device through the TA compensation result.
  • the network device can control the random access behavior of the terminal according to its own implementation situation, so that the behavior of the terminal device conforms to the actual situation on the network side.
  • FIG. 1A is a schematic flowchart of a contention-based random access method in the prior art
  • FIG. 1B is a schematic flowchart of a random access method based on non-competition in the prior art
  • FIG. 2 is a schematic diagram of a flow of random access in the prior art
  • Figure 3 is a schematic diagram of a random access process with initial TA compensation capability in the prior art
  • Fig. 4 is another schematic diagram of a random access process with initial TA compensation capability in the prior art
  • Fig. 5 is a system architecture diagram of a wireless communication system applied by an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of an embodiment of a random access method in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another embodiment of a random access method in an embodiment of the present invention.
  • Figure 8 is a schematic diagram of an embodiment of a terminal device in an embodiment of the present invention.
  • Figure 9 is a schematic diagram of an embodiment of a network device in an embodiment of the present invention.
  • Figure 10 is a schematic diagram of another embodiment of a network device in an embodiment of the present invention.
  • Fig. 11 is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • the main research at this stage is LEO and GEO.
  • the altitude of LEO satellites ranges from 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between terminals is generally less than 20ms.
  • the maximum satellite viewing time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the requirement for the terminal's transmitting power is not high.
  • GEO satellites have an orbital height of 35786km and a rotation period of 24 hours around the earth.
  • the signal propagation delay of single-hop communication between users is generally 250ms.
  • satellites In order to ensure satellite coverage and increase the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover dozens to hundreds of kilometers in diameter.
  • Ground area In order to ensure satellite coverage and increase the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover dozens to hundreds of kilometers in diameter. Ground area.
  • next-generation mobile communication system
  • next radio next radio
  • FIG. 1A it is a schematic flow diagram of a contention-based random access method in the prior art
  • FIG. 1B is a schematic flow diagram of a non-contention-based random access method in the prior art.
  • contention-based random access process shown in FIG. 1A can be divided into 4 steps, and the non-contention-based random access process shown in FIG. 1B can be divided into 2 steps.
  • the detailed steps are as follows:
  • Step 1 The terminal sends Msg (message, message) 1, that is, a random access preamble (Random Access Preamble) to the network. It can be understood that the terminal selects a PRACH (Physical Random Access Channel, physical random access channel) resource, and sends the selected preamble on the selected PRACH resource.
  • the base station can estimate the uplink Timing based on the preamble. It should be noted that if it is based on non-contention random access, PRACH resources and preamble can be specified by the base station.
  • Step 2 The network sends Msg2, namely RAR, to the terminal.
  • a random access response time window (Random Access Response Window) is opened, and RA-RNTI (Random Access Radio Network Temporary Identifier, random access wireless network temporary identifier) is monitored in the window.
  • Disturbed PDCCH Physical Downlink Control Channel, physical downlink control channel.
  • the terminal After the terminal successfully receives the PDCCH scrambled by the RA-RNTI, the terminal can obtain the PDSCH (Physical Downlink Shared Channel) scheduled by the PDCCH, which includes the RAR (Random Access Response, random access response), and RAR can also include but is not limited to the following information:
  • the subheader of RAR contains BI (Backoff Indicator), which is used to indicate the backoff time of retransmission of Msg1; (2) RAPID (Random Access Preamble Identity) in RAR, random access preamble Code identification), used for the preamble index received by the network in response; (3) The payload (payload) of RAR contains TAG (Timing Advance Group), which is used to adjust the uplink timing; 4) UL grant (uplink grant): Uplink resource indication for scheduling Msg3; (5) TC-RNTI (Temporary Cell Radio Network Temporary Identifier, Temporary Cell Radio Network Temporary Identifier): PDCCH (Physical Downlink) used to scramble Msg4 Control Channel, physical downlink control channel) initial access.
  • BI Backoff Indicator
  • RAPID Random Access Preamble Identity
  • RAR random access preamble Code identification
  • the terminal If the terminal receives the PDCCH scrambled by the RAR-RNTI, and the RAR contains the preamble index sent by itself, the terminal considers that it has successfully received the random access response.
  • Step 3 The terminal sends an uplink transmission (schedule transmission) to the network, and sends Msg3.
  • the terminal transmits Msg3 on the scheduling resource, which is mainly used to inform the network of what event triggered the RACH (Random Access Channel) process. For example, if it is an initial access random process, Msg3 will carry UE ID (User Equipment Identifier) and establishment cause (RRC reestablishment cause); if it is RRC reestablishment, it will carry Connected UE ID and establishment cause.
  • UE ID User Equipment Identifier
  • RRC reestablishment cause if it is RRC reestablishment, it will carry Connected UE ID and establishment cause.
  • Step 4 The network sends Msg4 to the terminal, that is, Contention Resolution.
  • Msg4 has two main functions, one is for contention conflict resolution, and the second is for the network to transmit RRC configuration messages to the terminal.
  • contention conflict resolution there are two ways to resolve the contention conflict: one is if the UE carries a C-RNTI (Cell Radio Network Temporary Identifier, cell radio network temporary identifier) in Msg3, Msg4 uses C-RNTI scrambled PDCCH scheduling. The other is that if the UE does not carry C-RNTI in Msg3, such as initial access, Msg4 uses TC-RNTI scrambled PDCCH scheduling.
  • the conflict resolution is that the UE receives the PDSCH of Msg4 and matches the CCCH ( Common Control Channel, SDU (Service Data Unit, Service Data Unit).
  • CCCH Common Control Channel, SDU (Service Data Unit, Service Data Unit).
  • the main purpose of random access is to synchronize the uplink with the cell.
  • the network can know the time when the terminal sends the preamble according to the RACH time-frequency resources used to receive the preamble from the terminal, and thus determine the initial TA (Timing Advance, Timing advance), and notify the terminal through RAR.
  • Fig. 2 it is a schematic diagram of a flow of random access in the prior art.
  • Two-step random access is currently in the process of Rel-16 standardization discussion, and its introduction can reduce time delay while reducing signaling overhead.
  • the MsgA in the two-step random access includes the Preamble transmitted on PRACH and the load information transmitted on PUSCH (Physical Uplink Shared Channel).
  • PUSCH Physical Uplink Shared Channel
  • the terminal monitors the network side in the configured window. In response, if it receives an indication that the contention conflict is successfully resolved from the network, the terminal ends the random access process.
  • the UEs in the NTN all have positioning capabilities and support two types of UEs at the same time, one is the UE without TA compensation capability, and the other is the one with TA compensation capability.
  • the initial TA determination method is different.
  • the UL timing and DL timing are aligned when the UE sends the preamble.
  • the network uses a longer preamble receiving window to receive the preamble from the UE, and then The TA value is indicated to the UE through RAR.
  • Step 1 The UE estimates its own TA based on the positioning capability, and uses the estimated TA to send msg1.
  • Step 2 The network determines the TA adjustment value of the UE after receiving msg1, and instructs it to the UE through msg2. Since the network does not know the exact TA value of the UE at this time, the network can schedule the msg3 resource of the UE according to the maximum uplink scheduling delay at this time.
  • Step 3 The UE adjusts the TA based on the received RAR indication, and sends msg3 on the uplink resource scheduled by the network.
  • Step 4 After the network receives the msg3 of the UE, the initial TA used by the UE can be known. Since then, the network side and the UE side have the same understanding of the TA value of the UE.
  • the UL timing and DL timing are aligned when the UE sends MsgA.
  • the network uses a longer preamble receiving window to receive the preamble from the UE, and then Indicate the TA value to the UE through MsgB.
  • Step 1 The UE estimates its own TA based on the positioning capability, and uses the estimated TA to send msgA.
  • the UE also carries its own TA value in the MsgA.
  • Step 2 The network determines the TA adjustment value of the UE after receiving msgA, and instructs it to the UE through msgB.
  • FIG. 5 it is a system architecture diagram of a wireless communication system applied in an embodiment of the present invention.
  • the network equipment may include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with the access network equipment.
  • the access network equipment can be a long-term evolution (LTE) system, a next-generation (mobile communication system) (next radio, NR) system, or an authorized auxiliary access long-term evolution (LAA- LTE) evolved base station (evolutional node B, abbreviated as eNB or e-NodeB) macro base station, micro base station (also known as “small base station”), pico base station, access point (AP), Transmission point (TP) or new generation Node B (gNodeB), etc.
  • LTE long-term evolution
  • NR next-generation
  • LAA- LTE authorized auxiliary access long-term evolution
  • the terminal equipment can be called user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal), smart terminal, etc.
  • the terminal equipment can be accessed via a radio access network (radio access network, RAN) communicates with one or more core networks.
  • the terminal device can be a mobile phone (or called a "cellular" phone), a computer with a mobile terminal, etc.
  • the terminal device can also be a portable, pocket-sized, handheld, computer built-in or vehicle-mounted mobile device, and the future NR network They exchange voice or data with the wireless access network.
  • the terminal device may also include a relay, and any data communication with the base station can be regarded as a terminal device.
  • a UE in a general sense will be introduced.
  • the indication information (the activation/deactivation indication information for initial TA compensation) sent by the network device to the terminal device may be for a four-step random access process, or for a two-step random access process.
  • the network device only sends an activation/deactivation indication message for initial TA compensation, which acts on the four-step random access process and the two-step random access process at the same time.
  • FIG. 6 it is a schematic diagram of an embodiment of a random access method in an embodiment of the present invention, including:
  • the network device sends instruction information to the terminal device.
  • the terminal device receives the instruction information sent by the network device; the instruction information is used to indicate whether the terminal device performs timing advance TA compensation.
  • the indication information may include: indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the network device can send the terminal device an instruction to activate TA compensation; if the implementation of the network device is more complex, it can maintain multiple The preamble receiving window, then, the network device can send the terminal device an instruction message for activating TA compensation.
  • the indication message is indication information for activating TA compensation; if the indication message does not include the preset identifier, then the indication message is indication information for deactivating TA compensation.
  • the preset logo can be other logos such as letters, numbers, etc., or can be a combination of letters, numbers, and other logos, and the details are not limited here.
  • the indication message may include a 1-bit indication field; when the 1-bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1-bit indication field is 0, the indication message is indication information for deactivating TA compensation. It should be noted that the indication message may also include an Nbit indication field, where N is an integer greater than or equal to 1. When the indication field of each bit is 1, the indication message is the indication information of activating TA compensation; when the indication field of each bit is all 0, the indication message is the indication information of inactivating TA compensation.
  • sending the instruction information by the network device to the terminal device may include: the network device sending the instruction information to the terminal device by means of broadcast, unicast or multicast.
  • the terminal device determines the TA compensation result according to the instruction information.
  • the terminal device determines the TA compensation result according to the instruction information, which may include: when the instruction information is the instruction information to deactivate the TA compensation, the terminal device determines not to perform the TA compensation; when the instruction information is the instruction information to activate the TA compensation In this case, the terminal device determines the TA compensation result according to the compensation capability of the terminal device.
  • the terminal device determines the TA compensation result according to the compensation capability of the terminal device, which may include: if the terminal device has the compensation capability, the terminal device performs TA compensation; In the case that the terminal device does not have the compensation capability, the terminal device does not perform TA compensation.
  • the terminal device performing TA compensation may include: the terminal device determines the estimated TA result according to the location of the terminal device and the satellite location (for a network architecture in the transparent transmission mode, it may also need to be based on the location information of the ground base station).
  • the terminal device sends a random access request to the network device through the TA compensation result.
  • the network device receives the random access request sent by the terminal device through the TA compensation result, and the TA compensation result is determined by the terminal device according to the instruction information.
  • the terminal device sending a random access request to the network device through the TA compensation result may include: when the terminal device has the compensation capability, the terminal device sends the random access request according to the estimated TA result; the terminal device does not have the compensation capability In the case of, the terminal device uses the uplink timing aligned with the downlink timing to send the random access request.
  • the types of random access in the embodiment of the present invention include the 4-step-rach type.
  • the network device receiving the random access request sent by the terminal device may include: the network device uses the first receiving window to receive the random access that the terminal device sends to the network device using the estimated TA result Request, the estimated TA result is calculated based on the position of the terminal device and the satellite position when the terminal device is capable of compensation.
  • the first receiving window used by the network is a short random access request receiving window to receive the random access request sent by the terminal device.
  • the network device receiving the random access request sent by the terminal device may include: the network device uses the second receiving window to receive the instruction information of the terminal device according to the deactivation TA compensation, using and downlink A random access request sent to the network device with the aligned uplink timing.
  • the second receiving window used by the network is a longer random access request receiving window to receive the random access request sent by the terminal device.
  • the window length of the first receiving window is smaller than the window length of the second receiving window.
  • the UE with TA compensation capability may decide whether to use the TA estimated by itself to send the random access request according to the instruction of the network device.
  • the UE receives the activation/deactivation indication of the initial TA compensation for the four-step random access from the network device.
  • the indication information is the common configuration of the cell, which can be carried in the system message, for example, using SIB (System Information Block, system information block) x (x is greater than or equal to 1); the specific indication method is as follows:
  • a 1-bit indication field indicates whether the initial TA compensation is activated/deactivated, the appearance of a 1-bit indication field indicates that the UE is allowed to perform initial TA compensation by itself, and the absence of a 1-bit indication field indicates that the UE is not allowed to perform initial TA compensation by itself. Further, the information indicated by the 1-bit indication field is used for the activation/deactivation indication of the initial TA compensation.
  • the 1-bit indication field always exists. 1 indicates that the UE is allowed to perform initial TA compensation by itself, and 0 indicates that the UE is not allowed to perform initial TA compensation by itself.
  • the UE activates/deactivates indication based on the initial TA compensation of the network: if the network instructs to deactivate the initial TA compensation, the UE does not perform TA compensation when sending the random access request, that is, the UE The random access request is sent using the UL timing aligned with the DL timing.
  • the UE depends on whether it has the TA compensation capability: 1) If the UE does not have the TA compensation capability, the UE does not perform TA compensation when sending a random access request, that is, the UE uses the timing aligned with DL UL timing sends msg1; 2) If the UE has TA compensation capability, the UE performs TA compensation when sending msg1, that is, the UE uses its own estimated TA to send a random access request.
  • the random access request includes Msg1, which includes the preamble transmitted on the physical random access channel PRACH; the terminal device sends the selected preamble on the selected PRACH resource.
  • Msg1 which includes the preamble transmitted on the physical random access channel PRACH; the terminal device sends the selected preamble on the selected PRACH resource.
  • the PRACH resource and preamble are selected by the terminal based on the triggering random access event. If it is based on non-competition random access, the PRACH resource and preamble can be notified by the network device to the terminal device of.
  • the network device sends a random access response to the terminal device according to the random access request.
  • the terminal device receives the random access response sent by the network device according to the random access request.
  • For the content included in the random access response refer to step 2 shown in FIG. 1A, which will not be repeated here.
  • the terminal device after the terminal device successfully receives the random access response, the random access process ends. However, for non-competitive random access, the terminal device will also perform steps 605 and 606 after successfully receiving the random access response.
  • the terminal device sends an event triggering random access to the network device.
  • the events that trigger the random access request may include but are not limited to the following events: (1) The user equipment (user equipment, UE) establishes a wireless connection during initial access: the UE starts from RRC_IDLE (Radio Resource Control (Radio Resource Control)).
  • RRC_IDLE Radio Resource Control (Radio Resource Control)
  • RRC Resource Control
  • RRC Radio Resource Control
  • RRC connection reestablishment process: so that the UE can reestablish the wireless connection after the radio link fails;
  • Handover The UE needs to establish uplink synchronization with the new cell; (4) In RRC_CONNECTED state, DL (Downlink) data arrives, and UL (Uplink, uplink) is in out-of-synchronization state; (5) In RRC_CONNECTED state, UL data arrives, At this time, the UL is in an out-of-synchronization state or there is no PUCCH resource for sending SR (Scheduling Request); (6) SR fails; (7) Synchronous reconfiguration request from RRC; (8) UE receives from RRC_INACTIVE (radio resource The control (Radio Resource Control, RRC) state is changed to the RRC_CONNECTED state; (9) Time calibration is established during the process of adding SCell (Secondary cell
  • the network device sends contention conflict resolution information to the terminal device.
  • step 605 and step 606 reference may be made to step 3 and step 4 shown in FIG. 1A, which will not be repeated here.
  • the terminal device receives the instruction information sent by the network device, and the instruction information is used to indicate whether the terminal device performs timing advance TA compensation; according to the instruction information, the terminal device determines the TA compensation result, and sends the TA compensation result to the network device Send a random access request.
  • the network device can control the random access behavior of the terminal according to its own implementation situation, so that the behavior of the terminal device conforms to the actual situation on the network side.
  • FIG. 7 it is a schematic diagram of another embodiment of a random access method in an embodiment of the present invention, including:
  • the network device sends instruction information to the terminal device.
  • the terminal device determines the TA compensation result according to the instruction information.
  • steps 701 and 702 in the embodiment of the present invention reference may be made to the description of steps 601 and 602 in the embodiment shown in FIG. 6, which will not be repeated here.
  • the terminal device sends a random access request to the network device through the TA compensation result.
  • the type of random access in the embodiment of the present invention includes the 2step-rach type.
  • the random access request may include MsgA; and MsgA includes the preamble transmitted on the PRACH and the load information transmitted on the physical uplink shared channel PUSCH.
  • the network device sends a random access response and contention conflict resolution information to the terminal device according to the random access request.
  • steps 703 and 704 in the embodiment of the present invention reference may be made to the descriptions of steps 603 and 604 in the embodiment shown in FIG. 6, which will not be repeated here.
  • the terminal device receives the instruction information sent by the network device, and the instruction information is used to indicate whether the terminal device performs timing advance TA compensation; according to the instruction information, the terminal device determines the TA compensation result, and sends the TA compensation result to the network device Send a random access request.
  • the network device can control the random access behavior of the terminal according to its own implementation situation, so that the behavior of the terminal device conforms to the actual situation on the network side.
  • FIG. 8 it is a schematic diagram of an embodiment of the terminal device in the embodiment of the present invention, which may include:
  • the receiving module 801 is configured to receive instruction information sent by a network device, where the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the processing module 802 is configured to determine the TA compensation result by the terminal device according to the instruction information
  • the sending module 803 is configured to send a random access request to the network device through the TA compensation result.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the processing module 802 is specifically configured to determine not to perform TA compensation when the instruction information is instruction information for deactivating TA compensation.
  • the processing module 802 is specifically configured to determine the TA compensation result according to the compensation capability of the terminal device when the instruction information is the instruction information for activating the TA compensation.
  • the processing module 802 is specifically configured to perform TA compensation on the terminal device when the terminal device has the compensation capability
  • the processing module 802 is specifically configured to not perform TA compensation on the terminal device when the terminal device does not have the compensation capability.
  • the processing module 802 is specifically configured to determine the estimated TA result according to the position of the terminal device and the satellite position.
  • the sending module 801 is specifically configured to send the random access request according to the estimated TA result when the terminal device has the compensation capability;
  • the sending module 801 is specifically configured to send the random access request using the uplink timing aligned with the downlink timing when the terminal device does not have the compensation capability.
  • the indication message is indication information for activating TA compensation; if the indication message does not include the preset identifier, then the indication message is indication information for deactivating TA compensation.
  • the indication message includes a 1bit indication field; when the 1bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1bit indication field is 0, the indication message is Instructions for activating TA compensation.
  • the receiving module 801 is specifically configured to receive the instruction information sent by the network device in the manner of broadcast, unicast or multicast.
  • the receiving module 801 is also used to receive the random access response sent by the network device according to the random access request.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • FIG. 9 it is a schematic diagram of an embodiment of a network device in an embodiment of the present invention, which may include:
  • the sending module 901 is configured to send instruction information to the terminal device, where the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the receiving module 902 is configured to receive the random access request sent by the terminal device through the TA compensation result, and the TA compensation result is determined by the terminal device according to the instruction information.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the indication message if the indication message includes a preset identifier, the indication message is indication information for activating TA compensation; if the indication message does not include the preset identifier, then the indication message is for deactivating TA compensation Instructions.
  • the indication message includes a 1bit indication field; when the 1bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1bit indication field is 0, the indication message is Instructions for activating TA compensation.
  • the indication information includes indication information for activating TA compensation
  • the receiving module 902 is specifically configured to use the first receiving window to receive the random access request sent by the terminal device to the network device using the estimated TA result.
  • the estimated TA result is that the terminal device is capable of compensation according to the location of the terminal device Calculated with the satellite position.
  • the indication information includes indication information for deactivating TA compensation
  • the receiving module 902 is specifically configured to use the second receiving window to receive the random access request sent by the terminal device to the network device using the uplink timing aligned with the downlink timing according to the indication information of deactivating the TA compensation.
  • the window length of the first receiving window is smaller than the window length of the second receiving window.
  • the sending module 901 is specifically configured to send instruction information to the terminal device in a manner of broadcast, unicast or multicast.
  • the sending module 901 is further configured to send a random access response to the terminal device according to the random access request.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • FIG. 10 it is a schematic diagram of another embodiment of a network device in an embodiment of the present invention, which may include:
  • the transmitter 1001 and the receiver 1002, and the transmitter 1001 and the receiver 1002 are connected by a bus;
  • the transmitter 1001 is configured to send instruction information to the terminal device, where the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the receiver 1002 is configured to receive a random access request sent by the terminal device through the TA compensation result, which is determined by the terminal device according to the instruction information.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the indication message if the indication message includes a preset identifier, the indication message is indication information for activating TA compensation; if the indication message does not include the preset identifier, then the indication message is for deactivating TA compensation Instructions.
  • the indication message includes a 1bit indication field; when the 1bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1bit indication field is 0, the indication message is Instructions for activating TA compensation.
  • the indication information includes indication information for activating TA compensation
  • the receiver 1002 is specifically configured to use the first receiving window to receive the random access request sent by the terminal device to the network device using the estimated TA result.
  • the estimated TA result is that the terminal device is capable of compensation according to the location of the terminal device Calculated with the satellite position.
  • the indication information includes indication information for deactivating TA compensation
  • the receiver 1002 is specifically configured to use the second receiving window to receive the random access request sent by the terminal device to the network device using the uplink timing aligned with the downlink timing according to the instruction information of deactivating the TA compensation.
  • the window length of the first receiving window is smaller than the window length of the second receiving window.
  • the transmitter 1001 is specifically configured to send instruction information to the terminal device in a manner of broadcast, unicast or multicast.
  • the transmitter 1001 is further configured to send a random access response to the terminal device according to the random access request.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • FIG. 11 it is a schematic diagram of another embodiment of a terminal device in an embodiment of the present invention.
  • a mobile phone may include: a radio frequency (RF) circuit 1110, a memory 1120, an input unit 1130, and a display unit 1140, a sensor 1150, an audio circuit 1160, a wireless fidelity (WiFi) module 1170, a processor 1180, a power supply 1190 and other components.
  • the radio frequency circuit 1110 includes a receiver 1111 and a transmitter 1112.
  • the structure of the mobile phone shown in FIG. 11 does not constitute a limitation on the mobile phone, and may include more or fewer components than those shown in the figure, or a combination of some components, or different component arrangements.
  • the RF circuit 1110 can be used for receiving and sending signals during the process of sending and receiving information or talking. In particular, after receiving the downlink information of the base station, it is processed by the processor 1180; in addition, the designed uplink data is sent to the base station.
  • the RF circuit 1110 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, and the like.
  • the RF circuit 1110 can also communicate with the network and other devices through wireless communication.
  • the above-mentioned wireless communication can use any communication standard or protocol, including but not limited to global system of mobile communication (GSM), general packet radio service (GPRS), code division multiple access (code division multiple access) multiple access (CDMA), wideband code division multiple access (WCDMA), long term evolution (LTE), email, short messaging service (SMS), etc.
  • GSM global system of mobile communication
  • GPRS general packet radio service
  • code division multiple access code division multiple access
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • LTE long term evolution
  • email short messaging service
  • the memory 1120 may be used to store software programs and modules.
  • the processor 1180 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 1120.
  • the memory 1120 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc.
  • the memory 1120 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the input unit 1130 may be used to receive inputted digital or character information, and generate key signal input related to user settings and function control of the mobile phone.
  • the input unit 1130 may include a touch panel 1131 and other input devices 1132.
  • the touch panel 1131 also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 1131 or near the touch panel 1131. Operation), and drive the corresponding connection device according to the preset program.
  • the touch panel 1131 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 1180, and can receive and execute the commands sent by the processor 1180.
  • the touch panel 1131 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the input unit 1130 may also include other input devices 1132.
  • other input devices 1132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick.
  • the display unit 1140 may be used to display information input by the user or information provided to the user and various menus of the mobile phone.
  • the display unit 1140 may include a display panel 1141.
  • the display panel 1141 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.
  • the touch panel 1131 can cover the display panel 1141. When the touch panel 1131 detects a touch operation on or near it, it transmits it to the processor 1180 to determine the type of touch event, and then the processor 1180 responds to the touch event. The type provides corresponding visual output on the display panel 1141.
  • the touch panel 1131 and the display panel 1141 are used as two independent components to implement the input and input functions of the mobile phone, but in some embodiments, the touch panel 1131 and the display panel 1141 can be integrated. Realize the input and output functions of the mobile phone.
  • the mobile phone may also include at least one sensor 1150, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor can include an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 1141 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 1141 and/or when the mobile phone is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when it is stationary.
  • the audio circuit 1160, the speaker 1161, and the microphone 1162 can provide an audio interface between the user and the mobile phone.
  • the audio circuit 1160 can transmit the electric signal converted from the received audio data to the speaker 1161, which is converted into a sound signal by the speaker 1161 for output; on the other hand, the microphone 1162 converts the collected sound signal into an electric signal, and the audio circuit 1160 After being received, it is converted into audio data, and then processed by the audio data output processor 1180, and sent to, for example, another mobile phone via the RF circuit 1110, or the audio data is output to the memory 1120 for further processing.
  • WiFi is a short-distance wireless transmission technology.
  • the mobile phone can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 1170. It provides users with wireless broadband Internet access.
  • FIG. 11 shows the WiFi module 1170, it is understandable that it is not a necessary component of the mobile phone, and can be omitted as needed without changing the essence of the invention.
  • the processor 1180 is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone. Various functions and processing data of the mobile phone can be used to monitor the mobile phone as a whole.
  • the processor 1180 may include one or more processing units; preferably, the processor 1180 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, application programs, etc. , The modem processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 1180.
  • the mobile phone also includes a power supply 1190 (such as a battery) for supplying power to various components.
  • a power supply 1190 (such as a battery) for supplying power to various components.
  • the power supply can be logically connected to the processor 1180 through a power management system, so that functions such as charging, discharging, and power management can be managed through the power management system.
  • the mobile phone may also include a camera, a Bluetooth module, etc., which will not be repeated here.
  • the receiver 1111 is configured to receive instruction information sent by a network device, and the instruction information is used to indicate whether the terminal device performs timing advance TA compensation;
  • the processor 1180 is configured to determine the TA compensation result by the terminal device according to the instruction information
  • the transmitter 1112 is configured to send a random access request to the network device through the TA compensation result.
  • the indication information includes indication information for activating TA compensation, or indication information for deactivating TA compensation.
  • the processor 1180 is specifically configured to determine not to perform TA compensation when the instruction information is instruction information for deactivating TA compensation.
  • the processor 1180 is specifically configured to determine the TA compensation result according to the compensation capability of the terminal device when the instruction information is instruction information for activating TA compensation.
  • the processor 1180 is specifically configured to perform TA compensation on the terminal device when the terminal device has a compensation capability
  • the processor 1180 is specifically configured to not perform TA compensation on the terminal device when the terminal device does not have the compensation capability.
  • the processor 1180 is specifically configured to determine the estimated TA result according to the position of the terminal device and the satellite position.
  • the transmitter 1112 is specifically configured to send the random access request according to the estimated TA result when the terminal device has the compensation capability
  • the transmitter 1112 is specifically configured to send the random access request by the terminal device using the uplink timing aligned with the downlink timing when the terminal device does not have the compensation capability.
  • the indication message if the indication message includes a preset identifier, the indication message is indication information for activating TA compensation; if the indication message does not include the preset identifier, then the indication message is for deactivating TA compensation Instructions.
  • the indication message includes a 1bit indication field; when the 1bit indication field is 1, the indication message is indication information for activating TA compensation; when the 1bit indication field is 0, the indication message is Instructions for activating TA compensation.
  • the transmitter 1112 is specifically configured to receive the instruction information sent by the network device in a manner of broadcast, unicast, or multicast.
  • the receiver 1111 is further configured to receive a random access response sent by the network device according to the random access request.
  • the type of random access includes a 4step-rach type and a 2step-rach type.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本发明实施例提供一种随机接入的方法、网络设备及终端设备，用于网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况。本发明实施例包括：终端设备接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；根据所述指示信息，所述终端设备确定TA补偿结果，并通过所述TA补偿结果向所述网络设备发送随机接入请求。

Description

一种随机接入的方法、网络设备及终端设备 技术领域
本发明涉及通信领域，尤其涉及一种随机接入的方法、网络设备及终端设备。
背景技术
目前3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)正在研究NTN(Non Terrestrial Network，非地面通信网络)技术，NTN一般采用卫星通信的方式向地面用户提供通信服务。相比地面蜂窝网通信，卫星通信具有很多独特的优点。首先，卫星通信不受用户地域的限制，例如一般的陆地通信不能覆盖海洋、高山、沙漠等无法搭设通信设备或由于人口稀少而不做通信覆盖的区域，而对于卫星通信来说，由于一颗卫星即可以覆盖较大的地面，加之卫星可以围绕地球做轨道运动，因此理论上地球上每一个角落都可以被卫星通信覆盖。其次，卫星通信有较大的社会价值。卫星通信在边远山区、贫穷落后的国家或地区都可以以较低的成本覆盖到，从而使这些地区的人们享受到先进的语音通信和移动互联网技术，有利于缩小与发达地区的数字鸿沟，促进这些地区的发展。再次，卫星通信距离远，且通信距离增大通讯的成本没有明显增加。最后，卫星通信的稳定性高，不受自然灾害的限制。
在NTN系统中，支持具备定时提前(Timing Advance，TA)补偿能力和不具备TA补偿能力这两种类型的终端。对于这两种类型的终端，其随机接入过程有所不同，网络针对这两类终端需要维护不同的preamble(前导码)接收窗、发送不同格式的RAR(Random Access Response，随机接入响应)，采用不同的调度策略等等，这些都会增加网络实现的复杂度。
发明内容
本申请实施例提供了一种随机接入的方法、网络设备及终端设备，用于网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况。
本发明实施例第一方面提供一种随机接入的方法，包括：终端设备接收网络设备发送的指示信息，该指示信息用于指示该终端设备是否进行定时提前TA补偿；根据该指示信息，该终端设备确定TA补偿结果，并通过该TA补偿结果向该网络设备发送随机接入请求。
可选的，在本发明的一些实施例中，该指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，该根据该指示信息，该终端设备确定TA补偿结果，包括：在该指示信息为去激活TA补偿的指示信息的情况下，该终端设备确定不进行TA补偿。
可选的，在本发明的一些实施例中，该根据该指示信息，该终端设备确定TA补偿结果，包括：在该指示信息为激活TA补偿的指示信息的情况下，该终端设备根据该终端设备的补偿能力确定该TA补偿结果。
可选的，在本发明的一些实施例中，在该指示信息为激活TA补偿的指示信息的情况下，该终端设备根据该终端设备的补偿能力确定该TA补偿结果，包括：在该终端设备具备该补偿能力的情况下，该终端设备进行TA补偿；在该终端设备不具备该补偿能力的情况下，该终端设备不进行TA补偿。
可选的，在本发明的一些实施例中，该终端设备进行TA补偿，包括：该终端设备根据该终端设备的位置和卫星位置确定估算的TA结果。
可选的，在本发明的一些实施例中，该通过该TA补偿结果向该网络设备发送随机接入请求，包括：在该终端设备具备该补偿能力的情况下，该终端设备根据该估算的TA结果发 送该随机接入请求；在该终端设备不具备该补偿能力的情况下，该终端设备使用与下行定时对齐的上行定时发送该随机接入请求。
可选的，在本发明的一些实施例中，若该指示消息包括预设标识，则该指示消息为该激活TA补偿的指示信息；若该指示消息未包括该预设标识，则该指示消息为该去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，该指示消息包括1bit指示域；当该1bit指示域为1时，该指示消息为该激活TA补偿的指示信息；当该1bit指示域为0时，该指示消息为该去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，该终端设备接收网络设备发送的指示信息，包括：该终端设备通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
可选的，在本发明的一些实施例中，该通过该TA补偿结果向该网络设备发送随机接入请求之后，该方法还包括：该终端设备接收该网络设备根据该随机接入请求发送的随机接入响应。
可选的，在本发明的一些实施例中，该随机接入的类型包括4step-rach类型，以及2step-rach类型。
本申请实施例第二方面提供一种随机接入的方法，包括：网络设备向终端设备发送指示信息，该指示信息用于指示该终端设备是否进行定时提前TA补偿；该网络设备接收该终端设备通过TA补偿结果发送的该随机接入请求，该TA补偿结果为该终端设备根据该指示信息确定的。
可选的，在本发明的一些实施例中，该指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，若该指示消息包括预设标识，则该指示消息为该激活TA补偿的指示信息；若该指示消息未包括该预设标识，则该指示消息为该去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，该指示消息包括1bit指示域；当该1bit指示域为1时，该指示消息为该激活TA补偿的指示信息；当该1bit指示域为0时，该指示消息为该去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，当该指示信息包括激活TA补偿的指示信息时，该网络设备接收该终端设备发送的该随机接入请求，包括：该网络设备使用第一接收窗接收该终端设备使用估算的TA结果向该网络设备发送的随机接入请求，该估算的TA结果为该终端设备在具备该补偿能力的情况下，根据该终端设备的位置和卫星位置进行计算得到的。
可选的，在本发明的一些实施例中，当该指示信息包括去激活TA补偿的指示信息时，该网络设备接收该终端设备发送的该随机接入请求，包括：该网络设备使用第二接收窗接收该终端设备根据该去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向该网络设备发送的随机接入请求。
可选的，在本发明的一些实施例中，该第一接收窗的窗口长度小于该第二接收窗的窗口长度。
可选的，在本发明的一些实施例中，该网络设备向终端设备发送指示信息，包括：网络设备通过广播、单播或者组播的方式，向终端设备发送指示信息。
可选的，在本发明的一些实施例中，该网络设备接收该终端设备通过TA补偿结果发送的该随机接入请求之后，该方法还包括：该网络设备根据该随机接入请求向该终端设备发送随机接入响应。
可选的，在本发明的一些实施例中，该随机接入的类型包括4step-rach类型，以及2step-rach类型。
本发明实施例第三方面提供一种终端设备，具有网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
本发明实施例第四方面提供一种网络设备，网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
本发明第五方面提供一种终端设备，包括：
接收器、处理器和发送器，所述接收器、所述处理器和所述发送器通过总线连接；
所述接收器，用于接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
所述处理器，用于根据所述指示信息，所述终端设备确定TA补偿结果；
所述发送器，用于通过所述TA补偿结果向所述网络设备发送随机接入请求。
本发明第六方面提供一种网络设备，包括：
接收器和发送器，所述接收器和所述发送器通过总线连接；
所述发送器，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
所述接收器，用于接收所述终端设备通过TA补偿结果发送的所述随机接入请求，所述TA补偿结果为所述终端设备根据所述指示信息确定的。
本发明第七方面提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如本发明第一方面及第一方面任一可选实现方式中或者本发明第二方面及第二方面任一可选实现方式中所述的方法。
本发明第八方面提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如本发明第一方面及第一方面任一可选实现方式中或者本发明第二方面及第二方面任一可选实现方式中所述的方法。
本发明第九方面提供一种芯片，所述芯片与所述终端设备中的存储器耦合，使得所述芯片在运行时调用所述存储器中存储的程序指令，使得所述终端设备执行如本发明第一方面及第一方面中任一可选实现方式中所述的方法。
本发明第十方面提供一种芯片，所述芯片与所述网络设备中的存储器耦合，使得所述芯片在运行时调用所述存储器中存储的程序指令，使得所述网络设备执行如本发明第二方面及第二方面中任一可选实现方式中所述的方法。
本申请实施例提供的技术方案中，终端设备接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；根据所述指示信息，所述终端设备确定TA补偿结果，并通过所述TA补偿结果向所述网络设备发送随机接入请求。使用本方法，网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况。
附图说明
图1A为现有技术中基于竞争的随机接入方式的一个流程示意图；
图1B为现有技术中基于非竞争的随机接入方式的一个流程示意图；
图2为现有技术中随机接入的一个流程示意图；
图3为现有技术中具有初始TA补偿能力的随机接入过程的一个示意图；
图4为现有技术中具有初始TA补偿能力的随机接入过程的另一个示意图；
图5为本发明实施例所应用的无线通信系统的系统架构图；
图6为本发明实施例中一种随机接入的方法的一个实施例示意图；
图7为本发明实施例中一种随机接入的方法的另一个实施例示意图；
图8为本发明实施例中终端设备的一个实施例示意图；
图9为本发明实施例中网络设备的一个实施例示意图；
图10为本发明实施例中网络设备的另一个实施例示意图；
图11为本发明实施例中终端设备的另一个实施例示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
通信卫星按照轨道高度的不同分为LEO(Low-Earth Orbit，低地球轨道)卫星、MEO(Medium-Earth Orbit，中地球轨道)卫星、GEO(Geostationary Earth Orbit，地球同步轨道)卫星、HEO(High Elliptical Orbit，高椭圆轨道)卫星等等。目前阶段主要研究的是LEO和GEO。LEO卫星高度范围为500km～1500km，相应轨道周期约为1.5小时～2小时。终端间单跳通信的信号传播延迟一般小于20ms。最大卫星可视时间20分钟。信号传播距离短，链路损耗少，对终端的发射功率要求不高。GEO卫星，轨道高度为35786km，围绕地球旋转周期为24小时。用户间单跳通信的信号传播延迟一般为250ms。
为了保证卫星的覆盖以及提升整个卫星通信系统的系统容量，卫星采用多波束覆盖地面，一颗卫星可以形成几十甚至数百个波束来覆盖地面；一颗卫星波束可以覆盖直径几十至上百公里的地面区域。
下面先对下一代(移动通信系统)(next radio，NR)的随机接入过程进行示例说明，如下所示：
(1)NR Rel-15版本中随机接入过程
在NR Rel-15版本中，主要支持以下两种随机接入方式，分别为基于竞争的随机接入方式和基于非竞争的随机接入方式。如图1A所示，为现有技术中基于竞争的随机接入方式的一个流程示意图；如图1B所示，为现有技术中基于非竞争的随机接入方式的一个流程示意图。
可以理解的是，图1A所示的基于竞争随机接入过程可以分为4步，图1B所示的基于非竞争的随机接入过程分可以为2步。详细的步骤如下：
步骤1：终端向网络发送Msg(message，消息)1，即随机接入前导码(Random Access Preamble)。可以理解的是，终端选择PRACH(Physical Random Access Channel，物理随机接入信道)资源，并在选择的PRACH资源上发送选择的preamble。基站基于preamble可以估计上行Timing。需要说明的是，如果是基于非竞争的随机接入，PRACH资源和preamble可以由基站指定。
步骤2：网络向终端发送Msg2，即RAR。
终端发送随机接入前导码之后,开启一个随机接入响应时间窗(Random Access Response Window)，在所述window内监测RA-RNTI(Random Access Radio Network Temporary Identifier，随机接入无线网络临时标识)加扰的PDCCH(Physical Downlink Control Channel，物理下行控制信道)。
终端成功接收到RA-RNTI加扰的PDCCH之后，终端能够获得所述PDCCH调度的PDSCH(Physical Downlink Shared Channel，物理下行共享信道)，其中包含了RAR(Random Access Response，随机接入响应)，而RAR又可以包含但不限于以下信息：
(1)RAR的subheader(子头)中包含BI(Backoff Indicator，回退指示)，用于指示重传Msg1的回退时间；(2)RAR中的RAPID(Random Access Preamble Identity，随机接入前导码标识)，用于网络响应收到的preamble index(前导码索引)；(3)RAR的payload(有效负载)中包含了TAG(Timing Advance Group，定时提前组)，用于调整上行定时；(4)UL grant(上行授权)：用于调度Msg3的上行资源指示；(5)TC-RNTI(Temporary Cell Radio Network Temporary Identifier，临时小区无线网络临时标识)：用于加扰Msg4的PDCCH(Physical Downlink Control Channel，物理下行控制信道)的初始接入。
如果终端接收到RAR-RNTI加扰的PDCCH，并且RAR中包含了自己发送的preamble index，则终端认为成功接收了随机接入响应。
可以理解的是，对于基于非竞争的随机接入，终端成功接收Msg2后，随机接入过程结束。对于基于竞争的随机接入，终端成功接收Msg2后，还需要继续传输Msg3和接收Msg4。
步骤3：终端向网络发送上行传输(schedule transmission)，发送Msg3。
终端在调度资源上传输Msg3，主要用于通知网络所述RACH(Random Access Channel，随机接入信道)过程是由什么事件触发。比如，如果是初始接入随机过程，则在Msg3中会携带UE ID(用户设备标识)和establishment cause(RRC重建原因)；如果是RRC重建，则会携带连接态UE标识和establishment cause。
步骤4：网络向终端发送Msg4，即竞争冲突解决(Contention Resolution)。
Msg4主要有两个作用，一个是用于竞争冲突解决，第二是网络向终端传输RRC配置消息。其中，竞争冲突解决有以下两种方式：一种是如果UE在Msg3中携带了C-RNTI(Cell Radio Network Temporary Identifier，小区无线网络临时标识)，则Msg4用C-RNTI加扰的PDCCH调度。另一种是如果UE在Msg3中没有携带C-RNTI，比如是初始接入，则Msg4用TC-RNTI加扰的PDCCH调度,冲突的解决是UE接收Msg4的PDSCH，通过匹配PDSCH中的CCCH(Common Control Channel，公共控制信)SDU(Service Data Unit，业务数据单元)。
从以上随机接入的过程可以看出，随机接入的主要目的就是终端与小区取得上行同步。在随机接入过程中，网络根据接收来自终端的preamble所使用的RACH时频资源就可以知道终端发送preamble的时刻，从而根据preamble的发送时刻和接收时刻确定所述终端的初始TA(Timing Advance，定时提前)，并通过RAR中告知终端。
(2)NR Rel-16版本中随机接入过程
如图2所示，为现有技术中随机接入的一个流程示意图。两步随机接入目前正处于Rel-16标准化讨论进程中，其引入可以降低时延同时减小信令开销。两步随机接入中的MsgA包含在PRACH上传输的Preamble和在PUSCH(Physical Uplink Shared Channel，物理上行共享信道)上传输的负载信息，在MsgA传输后，终端在配置的窗口内监听网络侧的响应，如果收到网络下发的竞争冲突解决成功的指示，则终端结束随机接入过程。
需要说明的是，基于目前Rel-17NTN标准化的基本假设，NTN中的UE都具备定位能力，同时支持两种类型的UE，一种是没有TA补偿能力的UE，一种是有TA补偿能力的UE。对于这两种类型的UE，初始TA的确定方法有所不同。
(1)针对四步随机接入，对于不具备初始TA补偿能力的UE，UE在发送preamble时UL timing与DL timing是对齐的，网络使用一个较长的preamble接收窗接收来自UE的preamble，然后通过RAR中向UE指示TA值。
对于具有初始TA补偿能力的终端，其随机接入过程如图3所示。
步骤1：UE基于定位能力估算自己的TA，并使用自己估算的所述TA发送msg1。
步骤2：网络在收到msg1后确定UE的TA调整值，并通过msg2指示给UE。由于此时网络并不知道UE确切的TA值，此时网络可以按照最大上行调度时延调度所述UE的msg3的资源。
步骤3：UE基于接收到的RAR的指示对TA进行调整，并在网络调度的上行资源上发送msg3。
步骤4：网络接收到UE的msg3后就可以知道所述UE使用的初始TA了，自此网络侧和UE侧对于所述UE的TA值理解就一致了。
(2)针对两步随机接入，对于不具备初始TA补偿能力的UE，UE在发送MsgA时UL timing与DL timing是对齐的，网络使用一个较长的preamble接收窗接收来自UE的preamble,然后通过MsgB中向UE指示TA值。
对于具有初始TA补偿能力的终端，其随机接入过程如图4所示。
步骤1：UE基于定位能力估算自己的TA，并使用自己估算的所述TA发送msgA。UE在MsgA中同时携带自己使用的TA值。
步骤2：网络在收到msgA后确定UE的TA调整值，并通过msgB指示给UE。
从上述可以看出，对于具备TA补偿能力和不具备TA补偿能力这两种类型的终端，其随机接入过程有所不同，网络针对这两类终端需要维护不同的preamble接收窗，发送不同格式的RAR，采用不同的Msg3调度策略等等，这些都会增加网络实现的复杂度，对网络实现提出了更高的要求。
如图5所示，为本发明实施例所应用的无线通信系统的系统架构图。包括网络设备和终端设备。其中，网络设备又可以包括接入网设备和核心网设备。即无线通信系统还包括用于与接入网设备进行通信的多个核心网。
接入网设备可以是长期演进(long-term evolution，LTE)系统、下一代(移动通信系统)(next radio，NR)系统或者授权辅助接入长期演进(authorized auxiliary access long-term evolution，LAA-LTE)系统中的演进型基站(evolutional node B，简称可以为eNB或e-NodeB)宏基站、微基站(也称为“小基站”)、微微基站、接入站点(access point，AP)、传输站点(transmission point，TP)或新一代基站(new generation Node B，gNodeB)等。
终端设备可称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal)、智能终端等，所述终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信。例如，终端设备可以是移动电话(或称为“蜂窝”电话)、具有移动终端的计算机等，终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置以及未来NR网络中的终端设备，它们与无线接入网交换语音或数据。对终端设备的说明：本申请中，终端设备还可以包括中继Relay，和基站可以进行数据通信的都可以看为终端设备，本申请中将以一般意义上的UE来介绍。
在本发明实施例中，网络设备向终端设备发送的指示信息(初始TA补偿的激活/去激活指示信息)可以是针对四步随机接入过程，或者，针对两步随机接入过程。或者，也可以是网络设备只发送一个初始TA补偿的激活/去激活指示信息，同时作用于四步随机接入过程和两步随机接入过程。
下面以实施例的方式，对本发明技术方案做进一步的说明。
一、针对四步随机接入过程，如图6所示，为本发明实施例中一种随机接入的方法的一个实施例示意图，包括：
601、网络设备向终端设备发送指示信息。
终端设备接收网络设备发送的指示信息；指示信息用于指示终端设备是否进行定时提前TA补偿。其中，指示信息可以包括：激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可以理解的是，如果网络设备的实现比较简单，只维护了一个preamble接收窗，那么，网络设备可以向终端设备发送去激活TA补偿的指示信息；如果网络设备的实现比较复杂，可以维护多个preamble接收窗，那么，网络设备可以向终端设备发送激活TA补偿的指示信息。
可选的，若指示消息包括预设标识，则指示消息为激活TA补偿的指示信息；若指示消息未包括预设标识，则指示消息为去激活TA补偿的指示信息。可以理解的是，该预设标识可以是字母、数字等其他标识，也可以字母、数字、其他标识的组合等，具体此处不做限定。
可选的，该指示消息可以包括1bit指示域；当1bit指示域为1时，指示消息为激活TA补偿的指示信息；当1bit指示域为0时，指示消息为去激活TA补偿的指示信息。需要说明的是，该指示消息也可以包括Nbit指示域，N为大于等于1的整数。当每个bit指示域都为1的时候，指示消息为激活TA补偿的指示信息；当每个bit指示域都为0的时候，指示消息为非激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，网络设备向终端设备发送指示信息，可以包括：网络设备通过广播、单播或者组播的方式，向终端设备发送指示信息。
602、终端设备根据指示信息，终端设备确定TA补偿结果。
终端设备根据指示信息，终端设备确定TA补偿结果，可以包括：在指示信息为去激活TA补偿的指示信息的情况下，终端设备确定不进行TA补偿；在指示信息为激活TA补偿的指示信息的情况下，终端设备根据终端设备的补偿能力确定TA补偿结果。
可选的，在指示信息为激活TA补偿的指示信息的情况下，终端设备根据终端设备的补偿能力确定TA补偿结果，可以包括：在终端设备具备补偿能力的情况下，终端设备进行TA补偿；在终端设备不具备补偿能力的情况下，终端设备不进行TA补偿。
进一步的，终端设备进行TA补偿，可以包括：终端设备根据终端设备的位置和卫星位置(对于透传模式的网络架构，可能同时还需要根据地面基站的位置信息)确定估算的TA结果。
603、终端设备通过TA补偿结果向网络设备发送随机接入请求。
网络设备接收终端设备通过TA补偿结果发送的随机接入请求，TA补偿结果为终端设备根据指示信息确定的。
其中，终端设备通过TA补偿结果向网络设备发送随机接入请求，可以包括：在终端设备具备补偿能力的情况下，终端设备根据估算的TA结果发送随机接入请求；在终端设备不具备补偿能力的情况下，终端设备使用与下行定时对齐的上行定时发送随机接入请求。
可以理解的是，本发明实施例中随机接入的类型包括4step-rach类型。
当指示信息包括激活TA补偿的指示信息时，网络设备接收终端设备发送的随机接入请求，可以包括：网络设备使用第一接收窗接收终端设备使用估算的TA结果向网络设备发送的随机接入请求，估算的TA结果为终端设备在具备补偿能力的情况下，根据终端设备的位置和卫星位置进行计算得到的。此时，网络使用的第一接收窗是一个长度较短的随机接入请求接收窗，来接收终端设备发送的随机接入请求。
当指示信息包括去激活TA补偿的指示信息时，网络设备接收终端设备发送的随机接入请求，可以包括：网络设备使用第二接收窗接收终端设备根据去激活TA补偿的指示信息， 使用与下行定时对齐的上行定时向网络设备发送的随机接入请求。此时，网络使用的第二接收窗是一个长度较长的随机接入请求接收窗，来接收终端设备发送的随机接入请求。
可选的，第一接收窗的窗口长度小于第二接收窗的窗口长度。
示例性的，在随机接入过程中，具有TA补偿能力的UE可以根据网络设备的指示来决定是否用自己估算的TA发送随机接入请求。UE接收网络设备的针对四步随机接入的初始TA补偿的激活/去激活指示。其中，指示信息为小区公共配置，可以在系统消息中携带，例如使用SIB(System Information Block，系统信息块)x(x大于等于1)；具体指示方式如下所示：
示例性的，通过1bit指示域是否出现指示初始TA补偿的激活/去激活，1bit指示域出现表示允许UE自己进行初始TA补偿，1bit指示域不出现表示不允许UE自己进行初始TA补偿。进一步的，使用1bit指示域指示的信息用于初始TA补偿的激活/去激活指示，1bit指示域总是存在，1表示允许UE自己进行初始TA补偿，0表示不允许UE自己进行初始TA补偿。
示例性的，在随机接入过程中，UE基于网络的初始TA补偿的激活/去激活指示：如果网络指示去激活初始TA补偿，则UE在发送随机接入请求时不进行TA补偿，即UE使用与DL timing对齐的UL timing发送随机接入请求。
如果网络指示激活初始TA补偿，则UE根据自身是否具备TA补偿能力：1)如果UE不具备TA补偿能力，则UE在发送随机接入请求时不进行TA补偿，即UE使用与DL timing对齐的UL timing发送msg1；2)如果UE具备TA补偿能力，则UE在发送msg1时进行TA补偿，即UE使用自己估算的TA发送随机接入请求。
可以理解的是，随机接入请求中包括Msg1，Msg1包括在物理随机接入信道PRACH上传输的前导码；终端设备在选择的PRACH资源上发送选择的preamble。需要说明的是，基于竞争的随机接入中，PRACH资源和preamble是终端根据触发随机接入事件选择的，如果是基于非竞争的随机接入，PRACH资源和preamble可以是网络设备向终端设备告知的。
604、网络设备根据随机接入请求向终端设备发送随机接入响应。
终端设备接收网络设备根据随机接入请求发送的随机接入响应。随机接入响应包括的内容可以参考图1A所示的步骤2，此处不再赘述。
需要说明的是，基于非竞争的随机接入，终端设备成功接收随机接入响应后，随机接入过程结束。但对于非竞争的随机接入，终端设备在成功接收随机接入响应后，还会进行步骤605和606。
605、终端设备向网络设备发送触发随机接入的事件。
其中，需要说明的是，触发随机接入请求的事件可以包括但不限于如下事件：(1)用户设备(user equipment，UE)初始接入时建立无线连接：UE从RRC_IDLE(无线资源控制(Radio Resource Control，RRC)空闲)态到RRC_CONNECTED(无线资源控制(Radio Resource Control，RRC)连接)态；(2)RRC连接重建过程：以便UE在无线链路失败后重建无线连接；(3)切换：UE需要与新的小区建立上行同步；(4)RRC_CONNECTED态下，DL(Downlink，下行)数据到达，此时UL(Uplink，上行)处于失步状态；(5)RRC_CONNECTED态下，UL数据到达，此时UL处于失步状态或者没有用于发送SR(Scheduling Request，调度请求)的PUCCH资源；(6)SR失败；(7)来自RRC的同步重配置请求；(8)UE从RRC_INACTIVE(无线资源控制(Radio Resource Control，RRC)激活)态转换为RRC_CONNECTED态；(9)在SCell(Secondary cell，辅小区)添加过程中建立时间校准；(10)请求其他SI(System Information，系统消息)；(11)波束失败恢复。
606、网络设备向终端设备发送竞争冲突解决信息。
需要说明的是，步骤605和步骤606可以参考图1A所示的步骤3和步骤4，此处不再赘述。
在本发明实施例中，终端设备接收网络设备发送的指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；根据指示信息，终端设备确定TA补偿结果，并通过TA补偿结果向网络设备发送随机接入请求。使用本方法，网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况。
二、针对两步随机接入过程，如图7所示，为本发明实施例中一种随机接入的方法的另一个实施例示意图，包括：
701、网络设备向终端设备发送指示信息。
702、终端设备根据指示信息，终端设备确定TA补偿结果。
本发明实施例中的步骤701和702可以参考图6所示实施例中步骤601和602的说明，此处不再赘述。
703、终端设备通过TA补偿结果向网络设备发送随机接入请求。
可以理解的是，本发明实施例中随机接入的类型包括2step-rach类型。该随机接入请求可以包括MsgA；而MsgA包括在PRACH上传输的前导码和在物理上行共享信道PUSCH上传输的负载信息。
704、网络设备根据随机接入请求向终端设备发送随机接入响应和竞争冲突解决信息。
本发明实施例中的步骤703和704可以参考图6所示实施例中步骤603和604的说明，此处不再赘述。
在本发明实施例中，终端设备接收网络设备发送的指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；根据指示信息，终端设备确定TA补偿结果，并通过TA补偿结果向网络设备发送随机接入请求。使用本方法，网络设备可以根据自身的实现情况来控制终端的随机接入行为，使终端设备的行为符合网络侧的实际情况。
下面对本发明实施例中的装置实施例进行说明，如图8所示，为本发明实施例中终端设备的一个实施例示意图，可以包括：
接收模块801，用于接收网络设备发送的指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；
处理模块802，用于根据指示信息，终端设备确定TA补偿结果；
发送模块803，用于通过TA补偿结果向网络设备发送随机接入请求。
可选的，在本发明的一些实施例中，指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，
处理模块802，具体用于在指示信息为去激活TA补偿的指示信息的情况下，确定不进行TA补偿。
可选的，在本发明的一些实施例中，
处理模块802，具体用于在指示信息为激活TA补偿的指示信息的情况下，根据终端设备的补偿能力确定TA补偿结果。
可选的，在本发明的一些实施例中，
处理模块802，具体用于在终端设备具备补偿能力的情况下，终端设备进行TA补偿；
处理模块802，具体用于在终端设备不具备补偿能力的情况下，终端设备不进行TA补偿。
可选的，在本发明的一些实施例中，
处理模块802，具体用于根据终端设备的位置和卫星位置确定估算的TA结果。
可选的，在本发明的一些实施例中，
发送模块801，具体用于在终端设备具备补偿能力的情况下，终端设备根据估算的TA结果发送随机接入请求；
发送模块801，具体用于在终端设备不具备补偿能力的情况下，终端设备使用与下行定时对齐的上行定时发送随机接入请求。
可选的，在本发明的一些实施例中，
若指示消息包括预设标识，则指示消息为激活TA补偿的指示信息；若指示消息未包括预设标识，则指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，指示消息包括1bit指示域；当1bit指示域为1时，指示消息为激活TA补偿的指示信息；当1bit指示域为0时，指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，
接收模块801，具体用于通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
可选的，在本发明的一些实施例中，
接收模块801，还用于接收网络设备根据随机接入请求发送的随机接入响应。
可选的，在本发明的一些实施例中，随机接入的类型包括4step-rach类型，以及2step-rach类型。
如图9所示，为本发明实施例中网络设备的一个实施例示意图，可以包括：
发送模块901，用于向终端设备发送指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；
接收模块902，用于接收终端设备通过TA补偿结果发送的随机接入请求，TA补偿结果为终端设备根据指示信息确定的。
可选的，在本发明的一些实施例中，指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，若指示消息包括预设标识，则指示消息为激活TA补偿的指示信息；若指示消息未包括预设标识，则指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，指示消息包括1bit指示域；当1bit指示域为1时，指示消息为激活TA补偿的指示信息；当1bit指示域为0时，指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，当指示信息包括激活TA补偿的指示信息时，
接收模块902，具体用于使用第一接收窗接收终端设备使用估算的TA结果向网络设备发送的随机接入请求，估算的TA结果为终端设备在具备补偿能力的情况下，根据终端设备的位置和卫星位置进行计算得到的。
可选的，在本发明的一些实施例中，当指示信息包括去激活TA补偿的指示信息时，
接收模块902，具体用于使用第二接收窗接收终端设备根据去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向网络设备发送的随机接入请求。
可选的，在本发明的一些实施例中，第一接收窗的窗口长度小于第二接收窗的窗口长度。
可选的，在本发明的一些实施例中，
发送模块901，具体用于通过广播、单播或者组播的方式，向终端设备发送指示信息。
可选的，在本发明的一些实施例中，
发送模块901，还用于根据随机接入请求向终端设备发送随机接入响应。
可选的，在本发明的一些实施例中，随机接入的类型包括4step-rach类型，以及2step-rach类型。
如图10所示，为本发明实施例中网络设备的另一个实施例示意图，可以包括：
发送器1001和接收器1002，发送器1001和接收器1002通过总线连接；
发送器1001，用于向终端设备发送指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；
接收器1002，用于接收终端设备通过TA补偿结果发送的随机接入请求，TA补偿结果为终端设备根据指示信息确定的。
可选的，在本发明的一些实施例中，指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，若指示消息包括预设标识，则指示消息为激活TA补偿的指示信息；若指示消息未包括预设标识，则指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，指示消息包括1bit指示域；当1bit指示域为1时，指示消息为激活TA补偿的指示信息；当1bit指示域为0时，指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，指示信息包括激活TA补偿的指示信息时，
接收器1002，具体用于使用第一接收窗接收终端设备使用估算的TA结果向网络设备发送的随机接入请求，估算的TA结果为终端设备在具备补偿能力的情况下，根据终端设备的位置和卫星位置进行计算得到的。
可选的，在本发明的一些实施例中，当指示信息包括去激活TA补偿的指示信息时，
接收器1002，具体用于使用第二接收窗接收终端设备根据去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向网络设备发送的随机接入请求。
可选的，在本发明的一些实施例中，第一接收窗的窗口长度小于第二接收窗的窗口长度。
可选的，在本发明的一些实施例中，
发送器1001，具体用于通过广播、单播或者组播的方式，向终端设备发送指示信息。
可选的，在本发明的一些实施例中，
发送器1001，还用于根据随机接入请求向终端设备发送随机接入响应。
可选的，在本发明的一些实施例中，随机接入的类型包括4step-rach类型，以及2step-rach类型。
如图11所示，为本发明实施例中终端设备的另一个实施例示意图，以手机为例进行说明，可以包括：射频(radio frequency，RF)电路1110、存储器1120、输入单元1130、显示单元1140、传感器1150、音频电路1160、无线保真(wireless fidelity，WiFi)模块1170、处理器1180、以及电源1190等部件。其中，射频电路1110包括接收器1111和发送器1112。本领域技术人员可以理解，图11中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图11对手机的各个构成部件进行具体的介绍：
RF电路1110可用于收发信息或通话过程中，信号的接收和发送，特别地，将基站的下行信息接收后，给处理器1180处理；另外，将设计上行的数据发送给基站。通常，RF电路1110包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(low noise amplifier，LNA)、双工器等。此外，RF电路1110还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(global system of mobile communication，GSM)、通用分组无线服务(general packet  radio service，GPRS)、码分多址(code division multiple access，CDMA)、宽带码分多址(wideband code division multiple access,WCDMA)、长期演进(long term evolution，LTE)、电子邮件、短消息服务(short messaging service，SMS)等。
存储器1120可用于存储软件程序以及模块，处理器1180通过运行存储在存储器1120的软件程序以及模块，从而执行手机的各种功能应用以及数据处理。存储器1120可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器1120可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元1130可用于接收输入的数字或字符信息，以及产生与手机的用户设置以及功能控制有关的键信号输入。具体地，输入单元1130可包括触控面板1131以及其他输入设备1132。触控面板1131，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1131上或在触控面板1131附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板1131可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器1180，并能接收处理器1180发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1131。除了触控面板1131，输入单元1130还可以包括其他输入设备1132。具体地，其他输入设备1132可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元1140可用于显示由用户输入的信息或提供给用户的信息以及手机的各种菜单。显示单元1140可包括显示面板1141，可选的，可以采用液晶显示器(liquid crystal display，LCD)、有机发光二极管(organic light-Emitting diode，OLED)等形式来配置显示面板1141。进一步的，触控面板1131可覆盖显示面板1141，当触控面板1131检测到在其上或附近的触摸操作后，传送给处理器1180以确定触摸事件的类型，随后处理器1180根据触摸事件的类型在显示面板1141上提供相应的视觉输出。虽然在图11中，触控面板1131与显示面板1141是作为两个独立的部件来实现手机的输入和输入功能，但是在某些实施例中，可以将触控面板1131与显示面板1141集成而实现手机的输入和输出功能。
手机还可包括至少一种传感器1150，比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板1141的亮度，接近传感器可在手机移动到耳边时，关闭显示面板1141和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于手机还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路1160、扬声器1161，传声器1162可提供用户与手机之间的音频接口。音频电路1160可将接收到的音频数据转换后的电信号，传输到扬声器1161，由扬声器1161转换为声音信号输出；另一方面，传声器1162将收集的声音信号转换为电信号，由音频电路1160接收后转换为音频数据，再将音频数据输出处理器1180处理后，经RF电路1110以发送给比如另一手机，或者将音频数据输出至存储器1120以便进一步处理。
WiFi属于短距离无线传输技术，手机通过WiFi模块1170可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图11示出了WiFi模块1170，但是可以理解的是，其并不属于手机的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
处理器1180是手机的控制中心，利用各种接口和线路连接整个手机的各个部分，通过运行或执行存储在存储器1120内的软件程序和/或模块，以及调用存储在存储器1120内的数据，执行手机的各种功能和处理数据，从而对手机进行整体监控。可选的，处理器1180可包括一个或多个处理单元；优选的，处理器1180可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1180中。
手机还包括给各个部件供电的电源1190(比如电池)，优选的，电源可以通过电源管理系统与处理器1180逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。尽管未示出，手机还可以包括摄像头、蓝牙模块等，在此不再赘述。
在本发明实施例中，接收器1111，用于接收网络设备发送的指示信息，指示信息用于指示终端设备是否进行定时提前TA补偿；
处理器1180，用于根据指示信息，终端设备确定TA补偿结果；
发送器1112，用于通过TA补偿结果向网络设备发送随机接入请求。
可选的，在本发明的一些实施例中，指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，处理器1180，具体用于在指示信息为去激活TA补偿的指示信息的情况下，确定不进行TA补偿。
可选的，在本发明的一些实施例中，处理器1180，具体用于在指示信息为激活TA补偿的指示信息的情况下，根据终端设备的补偿能力确定TA补偿结果。
可选的，在本发明的一些实施例中，
处理器1180，具体用于在终端设备具备补偿能力的情况下，终端设备进行TA补偿；
处理器1180，具体用于在终端设备不具备补偿能力的情况下，终端设备不进行TA补偿。
可选的，在本发明的一些实施例中，处理器1180，具体用于根据终端设备的位置和卫星位置确定估算的TA结果。
可选的，在本发明的一些实施例中，
发送器1112，具体用于在终端设备具备补偿能力的情况下，终端设备根据估算的TA结果发送随机接入请求；
发送器1112，具体用于在终端设备不具备补偿能力的情况下，终端设备使用与下行定时对齐的上行定时发送随机接入请求。
可选的，在本发明的一些实施例中，若指示消息包括预设标识，则指示消息为激活TA补偿的指示信息；若指示消息未包括预设标识，则指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，指示消息包括1bit指示域；当1bit指示域为1时，指示消息为激活TA补偿的指示信息；当1bit指示域为0时，指示消息为去激活TA补偿的指示信息。
可选的，在本发明的一些实施例中，发送器1112，具体用于通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
可选的，在本发明的一些实施例中，接收器1111，还用于接收网络设备根据随机接入请求发送的随机接入响应。
可选的，在本发明的一些实施例中，随机接入的类型包括4step-rach类型，以及2step-rach类型。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存储的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应所述理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。

Claims (67)

  1. 一种随机接入的方法，其特征在于，包括：
    终端设备接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    根据所述指示信息，所述终端设备确定TA补偿结果，并通过所述TA补偿结果向所述网络设备发送随机接入请求。
  2. 根据权利要求1所述的方法，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述根据所述指示信息，所述终端设备确定TA补偿结果，包括：
    在所述指示信息为去激活TA补偿的指示信息的情况下，所述终端设备确定不进行TA补偿。
  4. 根据权利要求2所述的方法，其特征在于，所述根据所述指示信息，所述终端设备确定TA补偿结果，包括：
    在所述指示信息为激活TA补偿的指示信息的情况下，所述终端设备根据所述终端设备的补偿能力确定所述TA补偿结果。
  5. 根据权利要求4所述的方法，其特征在于，在所述指示信息为激活TA补偿的指示信息的情况下，所述终端设备根据所述终端设备的补偿能力确定所述TA补偿结果，包括：
    在所述终端设备具备所述补偿能力的情况下，所述终端设备进行TA补偿；
    在所述终端设备不具备所述补偿能力的情况下，所述终端设备不进行TA补偿。
  6. 根据权利要求5所述的方法，其特征在于，所述终端设备进行TA补偿，包括：
    所述终端设备根据所述终端设备的位置和卫星位置确定估算的TA结果。
  7. 根据权利要求6所述的方法，其特征在于，所述通过所述TA补偿结果向所述网络设备发送随机接入请求，包括：
    在所述终端设备具备所述补偿能力的情况下，所述终端设备根据所述估算的TA结果发送所述随机接入请求；
    在所述终端设备不具备所述补偿能力的情况下，所述终端设备使用与下行定时对齐的上行定时发送所述随机接入请求。
  8. 根据权利要求2-7中任一项所述的方法，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  9. 根据权利要求8所述的方法，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  10. 根据权利要求1-9中任一项所述的方法，其特征在于，所述终端设备接收网络设备发送的指示信息，包括：
    所述终端设备通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
  11. 根据权利要求1-9中任一项所述的方法，其特征在于，所述通过所述TA补偿结果向所述网络设备发送随机接入请求之后，所述方法还包括：
    所述终端设备接收所述网络设备根据所述随机接入请求发送的随机接入响应。
  12. 根据权利要求11所述的方法，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  13. 一种随机接入的方法，其特征在于，包括：
    网络设备向终端设备发送指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    所述网络设备接收所述终端设备通过TA补偿结果发送的所述随机接入请求，所述TA补偿结果为所述终端设备根据所述指示信息确定的。
  14. 根据权利要求13所述的方法，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  15. 根据权利要求14所述的方法，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  16. 根据权利要求15所述的方法，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  17. 根据权利要求14-16中任一项所述的方法，其特征在于，当所述指示信息包括激活TA补偿的指示信息时，所述网络设备接收所述终端设备发送的所述随机接入请求，包括：
    所述网络设备使用第一接收窗接收所述终端设备使用估算的TA结果向所述网络设备发送的随机接入请求，所述估算的TA结果为所述终端设备在具备所述补偿能力的情况下，根据所述终端设备的位置和卫星位置进行计算得到的。
  18. 根据权利要求17所述的方法，其特征在于，当所述指示信息包括去激活TA补偿的指示信息时，所述网络设备接收所述终端设备发送的所述随机接入请求，包括：
    所述网络设备使用第二接收窗接收所述终端设备根据所述去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向所述网络设备发送的随机接入请求。
  19. 根据权利要求18所述的方法，其特征在于，所述第一接收窗的窗口长度小于所述第二接收窗的窗口长度。
  20. 根据权利要求13-19中任一项所述的方法，其特征在于，所述网络设备向终端设备发送指示信息，包括：
    网络设备通过广播、单播或者组播的方式，向终端设备发送指示信息。
  21. 根据权利要求13-19中任一项所述的方法，其特征在于，所述网络设备接收所述终端设备通过TA补偿结果发送的所述随机接入请求之后，所述方法还包括：
    所述网络设备根据所述随机接入请求向所述终端设备发送随机接入响应。
  22. 根据权利要求21所述的方法，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  23. 一种终端设备，其特征在于，包括：
    接收模块，用于接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    处理模块，用于根据所述指示信息，所述终端设备确定TA补偿结果；
    发送模块，用于通过所述TA补偿结果向所述网络设备发送随机接入请求。
  24. 根据权利要求23所述的终端设备，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  25. 根据权利要求24所述的终端设备，其特征在于，
    所述处理模块，具体用于在所述指示信息为去激活TA补偿的指示信息的情况下，确定不进行TA补偿。
  26. 根据权利要求24所述的终端设备，其特征在于，
    所述处理模块，具体用于在所述指示信息为激活TA补偿的指示信息的情况下，根据所述终端设备的补偿能力确定所述TA补偿结果。
  27. 根据权利要求26所述的终端设备，其特征在于，
    所述处理模块，具体用于在所述终端设备具备所述补偿能力的情况下，所述终端设备进行TA补偿；
    所述处理模块，具体用于在所述终端设备不具备所述补偿能力的情况下，所述终端设备不进行TA补偿。
  28. 根据权利要求27所述的终端设备，其特征在于，
    所述处理模块，具体用于根据所述终端设备的位置和卫星位置确定估算的TA结果。
  29. 根据权利要求28所述的终端设备，其特征在于，
    所述发送模块，具体用于在所述终端设备具备所述补偿能力的情况下，所述终端设备根据所述估算的TA结果发送所述随机接入请求；
    所述发送模块，具体用于在所述终端设备不具备所述补偿能力的情况下，所述终端设备使用与下行定时对齐的上行定时发送所述随机接入请求。
  30. 根据权利要求24-29中任一项所述的终端设备，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  31. 根据权利要求30所述的终端设备，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  32. 根据权利要求23-31中任一项所述的终端设备，其特征在于，
    所述接收模块，具体用于通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
  33. 根据权利要求23-31中任一项所述的终端设备，其特征在于，
    所述接收模块，还用于接收所述网络设备根据所述随机接入请求发送的随机接入响应。
  34. 根据权利要求33所述的终端设备，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  35. 一种网络设备，其特征在于，包括：
    发送模块，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    接收模块，用于接收所述终端设备通过TA补偿结果发送的所述随机接入请求，所述TA补偿结果为所述终端设备根据所述指示信息确定的。
  36. 根据权利要求35所述的网络设备，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  37. 根据权利要求36所述的网络设备，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  38. 根据权利要求37所述的网络设备，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  39. 根据权利要求36-38中任一项所述的网络设备，其特征在于，当所述指示信息包括激活TA补偿的指示信息时，
    所述接收模块，具体用于使用第一接收窗接收所述终端设备使用估算的TA结果向所述网络设备发送的随机接入请求，所述估算的TA结果为所述终端设备在具备所述补偿能力的情况下，根据所述终端设备的位置和卫星位置进行计算得到的。
  40. 根据权利要求39所述的网络设备，其特征在于，当所述指示信息包括去激活TA补偿的指示信息时，
    所述接收模块，具体用于使用第二接收窗接收所述终端设备根据所述去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向所述网络设备发送的随机接入请求。
  41. 根据权利要求40所述的网络设备，其特征在于，所述第一接收窗的窗口长度小于所述第二接收窗的窗口长度。
  42. 根据权利要求35-41中任一项所述的网络设备，其特征在于，
    所述发送模块，具体用于通过广播、单播或者组播的方式，向终端设备发送指示信息。
  43. 根据权利要求35-41中任一项所述的网络设备，其特征在于，
    所述发送模块，还用于根据所述随机接入请求向所述终端设备发送随机接入响应。
  44. 根据权利要求43所述的网络设备，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  45. 一种终端设备，其特征在于，包括：
    接收器、处理器和发送器，所述接收器、所述处理器和所述发送器通过总线连接；
    所述接收器，用于接收网络设备发送的指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    所述处理器，用于根据所述指示信息，所述终端设备确定TA补偿结果；
    所述发送器，用于通过所述TA补偿结果向所述网络设备发送随机接入请求。
  46. 根据权利要求45所述的终端设备，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  47. 根据权利要求46所述的终端设备，其特征在于，
    所述处理器，具体用于在所述指示信息为去激活TA补偿的指示信息的情况下，确定不进行TA补偿。
  48. 根据权利要求46所述的终端设备，其特征在于，
    所述处理器，具体用于在所述指示信息为激活TA补偿的指示信息的情况下，根据所述终端设备的补偿能力确定所述TA补偿结果。
  49. 根据权利要求48所述的终端设备，其特征在于，
    所述处理器，具体用于在所述终端设备具备所述补偿能力的情况下，所述终端设备进行TA补偿；
    所述处理器，具体用于在所述终端设备不具备所述补偿能力的情况下，所述终端设备不进行TA补偿。
  50. 根据权利要求49所述的终端设备，其特征在于，
    所述处理器，具体用于根据所述终端设备的位置和卫星位置确定估算的TA结果。
  51. 根据权利要求50所述的终端设备，其特征在于，
    所述发送器，具体用于在所述终端设备具备所述补偿能力的情况下，所述终端设备根据所述估算的TA结果发送所述随机接入请求；
    所述发送器，具体用于在所述终端设备不具备所述补偿能力的情况下，所述终端设备使用与下行定时对齐的上行定时发送所述随机接入请求。
  52. 根据权利要求46-51中任一项所述的终端设备，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  53. 根据权利要求52所述的终端设备，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  54. 根据权利要求45-53中任一项所述的终端设备，其特征在于，
    所述发送器，具体用于通过广播、单播或者组播的方式，接收网络设备发送的指示信息。
  55. 根据权利要求45-53中任一项所述的终端设备，其特征在于，
    所述接收器，还用于接收所述网络设备根据所述随机接入请求发送的随机接入响应。
  56. 根据权利要求55所述的终端设备，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  57. 一种网络设备，其特征在于，包括：
    接收器和发送器，所述接收器和所述发送器通过总线连接；
    所述发送器，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备是否进行定时提前TA补偿；
    所述接收器，用于接收所述终端设备通过TA补偿结果发送的所述随机接入请求，所述TA补偿结果为所述终端设备根据所述指示信息确定的。
  58. 根据权利要求57所述的网络设备，其特征在于，所述指示信息包括激活TA补偿的指示信息，或者，去激活TA补偿的指示信息。
  59. 根据权利要求58所述的网络设备，其特征在于，
    若所述指示消息包括预设标识，则所述指示消息为所述激活TA补偿的指示信息；
    若所述指示消息未包括所述预设标识，则所述指示消息为所述去激活TA补偿的指示信息。
  60. 根据权利要求59所述的网络设备，其特征在于，所述指示消息包括1bit指示域；
    当所述1bit指示域为1时，所述指示消息为所述激活TA补偿的指示信息；
    当所述1bit指示域为0时，所述指示消息为所述去激活TA补偿的指示信息。
  61. 根据权利要求58-60中任一项所述的网络设备，其特征在于，当所述指示信息包括激活TA补偿的指示信息时，
    所述接收器，具体用于使用第一接收窗接收所述终端设备使用估算的TA结果向所述网络设备发送的随机接入请求，所述估算的TA结果为所述终端设备在具备所述补偿能力的情况下，根据所述终端设备的位置和卫星位置进行计算得到的。
  62. 根据权利要求61所述的网络设备，其特征在于，当所述指示信息包括去激活TA补偿的指示信息时，
    所述接收器，具体用于使用第二接收窗接收所述终端设备根据所述去激活TA补偿的指示信息，使用与下行定时对齐的上行定时向所述网络设备发送的随机接入请求。
  63. 根据权利要求62所述的网络设备，其特征在于，所述第一接收窗的窗口长度小于所述第二接收窗的窗口长度。
  64. 根据权利要求57-63中任一项所述的网络设备，其特征在于，
    所述发送器，具体用于通过广播、单播或者组播的方式，向终端设备发送指示信息。
  65. 根据权利要求57-63中任一项所述的网络设备，其特征在于，
    所述发送器，还用于根据所述随机接入请求向所述终端设备发送随机接入响应。
  66. 根据权利要求65所述的网络设备，其特征在于，所述随机接入的类型包括4step-rach类型，以及2step-rach类型。
  67. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-12或者13-22中任意一项所述的方法。
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