CN113163481B - Method for determining uplink transmission timing, terminal and base station - Google Patents

Abstract

A method, a terminal and a base station for determining uplink transmission timing are provided, the method comprises: by timing offset K _offset Determining uplink transmission timing, wherein the timing offset K _offset Is determined according to the common time advance common TA and a preset constant. According to the method for determining uplink transmission timing, the terminal and the base station provided by the embodiment of the invention, when the terminal sends the PUSCH or PUCCH, the terminal does not need to adopt different access processing according to the type of the terminal per se, but adopts the timing offset determined in the same mode to send the PUSCH or PUCCH, so that the same processing mode can be adopted for all terminals, the change of signaling messages in the existing random access process is avoided, and the processing processes of a network and the terminal are simplified. In addition, the embodiment of the invention can realize better balance in the aspects of reducing the random access signaling overhead and reducing the RTT.

Description

A method for determining uplink transmission timing, terminal and base station

technical field

The present invention relates to the technical field of mobile communication, in particular to a method for determining uplink transmission timing, a terminal and a base station.

Background technique

In order to meet the demand for ubiquitous wireless coverage, the fifth generation mobile communication (5G) system needs to support the integration of terrestrial network and satellite network. Currently, the non-terrestrial network (NTN, Non-terrestrial network) technology being studied hopes to achieve the following goals through the satellite network:

1) Provide cost-effective coverage for un-served areas (such as ocean, aircraft, underwater) in 5G deployment;

2) Strengthen the reliability of 5G networks, for example, improve the continuity of high-speed machine communication (M2M, Machine to Machine)/Internet of Things (IoT, Internet of Everything) business, and provide communication and emergency communication protection in extreme environments;

3) Ensure 5G network scalability and provide effective multicast/broadcast resources for the network edge.

Taking Geostationary Earth Orbit (GEO) as an example, its satellite constellation has the advantages of wide single-satellite coverage and simple networking. For example, a single GEO satellite can cover the entire territory of China, and three GEO satellites can achieve global coverage. .

Contents of the invention

At least one embodiment of the present invention provides a method for determining uplink transmission timing, a terminal and a network device, which can avoid modification of signaling messages in the existing random access process, and simplify random access of the network and terminals processing flow.

According to one aspect of the present invention, at least one embodiment provides a method for determining uplink transmission timing, which is applied to a terminal, including:

The uplink transmission timing is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common TA and a preset constant.

According to at least one embodiment of the present invention, the uplink transmission timing is determined according to at least one of the following methods:

If the terminal receives the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal in time slot n, then the terminal in time slot n+K ₂ +Δ+ The physical uplink shared channel PUSCH is transmitted in K _offset , wherein K ₂ is a slot offset (slot offset), and Δ is a coefficient related to the subcarrier of PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the terminal receives the downlink control information DCI for scheduling PUSCH transmission in time slot n, and the time slot offset K ₂ is indicated in the DCI, then the terminal

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot in which the terminal receives the PDSCH is time slot n, the terminal transmits the PUCCH including the corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is the number of time slots;

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

According to at least one embodiment of the present invention, the method for determining the uplink transmission timing is applied in a random access RACH process;

Alternatively, the method for determining the uplink transmission timing is applied in a radio resource control RRC connection establishment (RRC connection establishment) process.

According to at least one embodiment of the present invention, the preset constant includes at least: the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

According to at least one embodiment of the present invention, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

According to at least one embodiment of the present invention, the constants α and β are determined in one of the following ways:

If the time unit of the timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S;

If the time unit of the default timing offset is frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the timing offset is the joint uplink-downlink conversion period, and the joint uplink-downlink conversion period includes two uplink-downlink conversion periods and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

According to at least one embodiment of the present invention, after establishing a radio resource control RRC connection with the network, the method further includes:

The terminal updates the timing offset K _offset according to the indication information sent by the network.

According to at least one embodiment of the present invention, before updating the timing offset according to the indication information sent by the network, the method further includes:

After establishing a radio resource control RRC connection with the network, the terminal also reports one or more of the following auxiliary information to the network:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

Wherein, the reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported.

According to another aspect of the present invention, at least one embodiment provides a method for determining uplink transmission timing, which is applied to a base station, including:

The uplink transmission timing of the terminal is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common TA and a preset constant.

According to at least one embodiment of the present invention, the uplink transmission timing of the terminal is determined according to at least one of the following methods:

If the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal is sent to the terminal at time slot n, then it is determined that the terminal is in time slot n+K ₂ +Δ+K _offset transmits the physical uplink shared channel PUSCH, where K ₂ is the slot offset (slot offset), and Δ is a coefficient related to the subcarrier of the PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the downlink control information DCI for scheduling PUSCH transmission is sent to the terminal in time slot n, and the time slot offset K ₂ is indicated in the DCI, then it is determined that the terminal is in the time slot

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot of the PDSCH sent to the terminal is time slot n, it is determined that the terminal transmits a PUCCH including corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is time slot number;

receiving the PUSCH or PUCCH sent by the terminal according to the time slot in which the terminal sends the PUSCH or PUCCH;

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

According to at least one embodiment of the present invention, the method for determining the uplink transmission timing is applied to the random access RACH process of the terminal;

Alternatively, the method for determining the uplink transmission timing is applied in a radio resource control RRC connection establishment (RRC connection establishment) process of the terminal.

According to at least one embodiment of the present invention, the preset constant includes at least: the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

According to at least one embodiment of the present invention, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

According to at least one embodiment of the present invention, the constants α and β are determined in one of the following ways:

If the time unit of the timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S;

If the time unit of the timing offset is a frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the timing offset is the joint uplink-downlink conversion period, and the joint uplink-downlink conversion period includes two uplink-downlink conversion periods and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

According to at least one embodiment of the present invention, after the terminal establishes a radio resource control RRC connection with the base station, the method further includes:

Send indication information to the terminal, and update the timing offset K _offset .

According to at least one embodiment of the present invention, before sending the indication information, the method further includes:

Update the timing offset according to the complete full TA of the terminal obtained in the random access process; or,

After establishing a radio resource control RRC connection with the terminal, receiving auxiliary information sent by the terminal, and updating the timing offset according to the auxiliary information;

Wherein, the auxiliary information includes one or more of the following:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

The reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported.

According to another aspect of the present invention, at least one embodiment provides a terminal, including:

The uplink transmission timing determination module is configured to determine the uplink transmission timing through a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant.

According to at least one embodiment of the present invention, the uplink transmission timing determining module is further configured to determine uplink transmission timing according to at least one of the following manners, including:

If the terminal receives the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal in time slot n, then the terminal in time slot n+K ₂ +Δ+ The physical uplink shared channel PUSCH is transmitted in K _offset , wherein K ₂ is a slot offset (slot offset), and Δ is a coefficient related to the subcarrier of PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the terminal receives the downlink control information DCI for scheduling PUSCH transmission in time slot n, and the time slot offset K ₂ is indicated in the DCI, then the terminal

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot in which the terminal receives the PDSCH is time slot n, the terminal transmits the PUCCH including the corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is the number of time slots.

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

According to at least one embodiment of the present invention, the terminal further includes:

The uplink transmission timing update module is configured to update the timing offset K _offset according to the indication information sent by the network after the terminal establishes a radio resource control RRC connection with the network.

According to at least one embodiment of the present invention, the uplink transmission timing update module is further configured to establish a radio resource control RRC connection between the terminal and the network before updating the timing offset according to the indication information sent by the network After that, one or more of the following auxiliary information is also reported to the network:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

According to another aspect of the present invention, at least one embodiment provides a terminal, including: a processor, a memory, and a program stored in the memory and operable on the processor, the program is processed by the The steps of the method for determining the uplink transmission timing as described above are implemented when the device is executed.

According to another aspect of the present invention, at least one embodiment provides a base station, including:

The uplink transmission timing determination module is configured to determine the uplink transmission timing of the terminal through a timing offset K _offset , wherein the timing offset K _offset is determined according to a common TA and a preset constant.

According to at least one embodiment of the present invention, the uplink transmission timing determination module is further configured to determine the uplink transmission timing of the terminal according to at least one of the following methods:

If the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal is sent to the terminal at time slot n, then it is determined that the terminal is in time slot n+K ₂ +Δ+K _offset transmits the physical uplink shared channel PUSCH, where K ₂ is the slot offset (slot offset), and Δ is a coefficient related to the subcarrier of the PUSCH;

中传输PUSCH，其中，μ_PUsCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the downlink control information DCI for scheduling PUSCH transmission is sent to the terminal in time slot n, and the time slot offset K ₂ is indicated in the DCI, then it is determined that the terminal is in the time slot

Transmit PUSCH in , wherein, μ _PUsCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot of the PDSCH sent to the terminal is time slot n, it is determined that the terminal transmits a PUCCH including corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is time slot number;

A receiving module, configured to receive the PUSCH or PUCCH sent by the terminal according to the time slot in which the terminal sends the PUSCH or PUCCH;

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

According to at least one embodiment of the present invention, the base station further includes:

An uplink transmission timing updating module, configured to send indication information to the terminal after the base station establishes a radio resource control RRC connection with the terminal, and update the timing offset K _offset .

According to at least one embodiment of the present invention, the base station further includes:

Update value calculation module for:

Update the timing offset according to the complete full TA of the terminal obtained in the random access process; or,

After establishing a radio resource control RRC connection with the terminal, receiving auxiliary information sent by the terminal, and updating the timing offset according to the auxiliary information;

Wherein, the auxiliary information includes one or more of the following:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

The reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported.

According to another aspect of the present invention, at least one embodiment provides a base station, including: a processor, a memory, and a program stored in the memory and operable on the processor, the program is processed by the The steps of the method for determining the uplink transmission timing as described above are implemented when the device is executed.

According to another aspect of the present invention, at least one embodiment provides a computer-readable storage medium, where a program is stored on the computer-readable storage medium, and when the program is executed by a processor, the above method is implemented. step.

Compared with the prior art, the method for determining the timing of uplink transmission, the terminal and the base station provided by the embodiments of the present invention, when the terminal sends PUSCH or PUCCH, it does not need to use different access processing, but all use the timing offset determined in the same way to send PUSCH or PUCCH, so that all terminals can use the same processing method, avoiding the modification of signaling messages in the existing random access process , which simplifies the processing of the network and the terminal. In addition, the embodiments of the present invention can also achieve a better balance in terms of reducing random access signaling overhead and reducing RTT.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

FIG. 1 is a flow chart when the method for determining uplink transmission timing according to an embodiment of the present invention is applied to a terminal side;

Fig. 2 is a kind of example diagram of the relationship between timing offset and K2 dynamic range;

Fig. 3 is a kind of example diagram of timing offset and RTT relation;

FIG. 4 is a flow chart when the method for determining uplink transmission timing according to an embodiment of the present invention is applied to the base station side;

FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of the present invention;

FIG. 6 is another schematic structural diagram of a terminal provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a base station provided by an embodiment of the present invention;

FIG. 8 is another schematic structural diagram of a base station provided by an embodiment of the present invention.

detailed description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus. "And/or" in the specification and claims means at least one of the connected objects.

The technology described herein is not limited to the NR system and the evolution (LTE-Advanced, LTE-A) system of the Long Time Evolution (Long Time Evolution, LTE)/LTE, and can also be used in various wireless communication systems, such as Code Division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. A TDMA system can implement a radio technology such as Global System for Mobile Communication (GSM). The OFDMA system can realize radios such as UltraMobile Broadband (UltraMobile Broadband, UMB), Evolution-UTRA (Evolution-UTRA, E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. technology. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-Advanced (like LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. However, the following description describes NR systems for example purposes, and NR terminology is used in much of the following description, although the techniques are applicable to applications other than NR system applications as well.

The following description provides examples and does not limit the scope, applicability or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

As described in the background art, the GEO satellite constellation has the advantages of wide single-satellite coverage and simple networking. However, limited by the large orbital height (35786km), GEO satellite propagation delay is large, and the real-time service experience is poor. In particular, when the GEO satellite adopts a bent pipe communication mode, ground user signals first arrive at the GEO satellite, and then are forwarded to the ground gateway through the GEO satellite. After evaluation, considering the signal processing delay of each device, the two-way communication delay (UE→GEO→ground gateway→GEO→UE) of the GEO network using the bent pipe forwarding mode is about 544.8ms or more.

In existing signaling messages designed for terrestrial networks, for example, some timing relationships are explicitly indicated in certain fields of downlink control information (DCI, Downlink Control Information), including:

K0: time slot (slot) offset between the downlink grant DCI (DL grant DCI) and the scheduled physical downlink shared channel (PDSCH, PhysicalDownlink Shared CHannel). The value range of K0 is 0,...,32;

K1: time slot offset between PDSCH and Hybrid Automatic Repeat Request Response (HARQ-ACK) feedback. The value range of K1 is 0,...,15;

K2: The time slot offset between the uplink grant DCI (UL grant DCI) and the scheduled physical downlink shared channel (PUSCH, PhysicalUplink Shared CHannel). The value range of K2 is 0,...,32.

In the NTN scenario, considering the large time delay between the satellite and the ground, the value ranges of many timing parameters (such as K1 and K2 above) in the prior art are no longer sufficient.

For example, K1 is used to indicate the time slot offset between PDSCH and HARQ feedback. Assume that the base station indicates to schedule the PDSCH at the time slot n through the DCI. The ground UE can only receive the PDSCH sent by the base station at time slot n+τ _delay , where τ _delay represents the propagation delay between the satellite and the ground. For GEO satellites, τ _delay ≥ 120ms. Regardless of the decoding delay and TA processing on the UE side, assuming that the UE sends HARQ-ACK feedback immediately after receiving the PDSCH, the HARQ-ACK also needs to propagate for τ _delay time before reaching the satellite. This means that at least a time interval of 2τ _delay needs to be experienced between when the base station sends the PDSCH and when the base station receives the HARQ-ACK fed back by the UE. For GEO satellites, this time interval is at least 240 ms. Considering 30kHz subcarrier spacing, each slot lasts 0.5ms, then 240ms time interval corresponds to 480 time slots (slot). Obviously, 480 is far beyond the parameter value range of K1 in the prior art.

For the above problems, one solution is to introduce new parameters instead of modifying the existing value range of K1 or K2 in the prior art, for example, introducing a timing offset K _offset . at this time:

The time slot offset between PDSCH and HARQ-ACK feedback = K _offset + K1;

The time slot offset between the UL grant DCI and the scheduled PUSCH=K _offset +K2.

Currently, the prior art does not provide a method for determining the value of the above K _offset . One possible manner is to directly configure the value of K _offset through high-layer signaling. The premise of directly configuring the value of K _offset by high-level signaling is that the base station needs to know the propagation distance between the base station and the terminal (the propagation distance can be represented by the propagation delay τ _delay ), and configure K _offset so that it is at least twice greater than τ _delay . When the base station is on the ground, the transmission delay between the ground base station and the terminal usually includes the delay from the base station to the satellite and then to the terminal; when the base station is set on the satellite side (such as a low-orbit satellite), the transmission delay from the base station to the terminal usually includes Delay from base station to terminal.

The New Radio Interface (NR) system supports both 4-step random access (RACH) procedures and 2-step random access procedures. Among them, the 4-step random access process includes:

1) The UE first sends the message 1 (Msg 1) of the 4-step random access procedure, that is, the PRACH channel;

2) After receiving Msg 1, gNB sends message 2 (Msg 2) of the 4-step random access process, that is, a random access response (RAR, RandomAccess Response) message;

3) The UE receives Msg 2, and sends message 3 (Msg 3) of the 4-step random access procedure according to the scheduling information carried in Msg 2;

4) The base station receives Msg 3, sends message 4 (Msg 4) of the 4-step random access procedure, and completes the random access procedure.

In Step 2 and Step 4 of the above 4-step random access procedure, when UE receives Msg 1 or Msg 3, it needs to feed back HARQ-ACK.

The 2-step random access process includes:

1) The UE first sends a message A (Msg A) of the 2-step random access procedure;

2) After receiving Msg A, gNB sends message B (Msg B) of the 2-step random access procedure, and completes the random access procedure.

In the second step of the above two-step random access procedure, when the UE receives the Msg B, it needs to feed back the HARQ-ACK.

It can be seen that in the second step of the 4-step random access process, the UE needs to use the K _offset configuration when determining the timing of the RAR message listening window; in addition, in the second and fourth steps, in order to determine the Msg 1 The HARQ-ACK feedback timing of Msg 3 also needs to use K _offset configuration. In the second step of the two-step random access procedure, in order to determine the RAR message listening window timing and the HARQ-ACK feedback timing of Msg A, the UE also needs to use the K _offset configuration.

In addition, in the NTN system, there are usually two types of terminals. in,

The first type of terminal (UE) has a Global Navigation Satellite System (GNSS, Global Navigation Satellite System) positioning capability, and can determine the position of a satellite through an ephemeris. Therefore, when the first type of terminal sends PRACH (corresponding to Msg 1 in the 4-step random access procedure, or Msg A in the 2-step random access procedure), it can automatically estimate the timing advance (TA, Timing Advance), And pre-compensate in advance. That is to say, the first type of terminal is a terminal capable of automatically estimating TA.

The second type of terminal cannot automatically estimate the TA before sending the PRACH, that is, the second type of terminal is a terminal not capable of automatically estimating the TA. For this type of terminal, the base station can indicate a common timing advance (commonTA) through a system message. All terminals in the same cell or beam perform TA pre-compensation through common TA when sending PRACH.

Note that for the second type of terminal, the terminal performs TA pre-compensation according to the common TA indicated by the base station. When the base station receives the PRACH channel sent by the second type of terminal, it knows how much the terminal has compensated (common TA). Combined with the TA residual offset measured by the base station side, it is possible to determine the propagation distance τ _delay between the base station and the terminal. In this case, the base station can determine the timing offset K _offset according to τ _delay , and carry it in the RAR response message and configure it to the terminal.

However, for the first type of terminal, the terminal performs TA pre-compensation according to its own position and satellite ephemeris. The base station cannot know how many TAs the terminal has compensated. When the base station receives the PRACH channel sent by the second type of terminal, it can only determine how much the terminal's TA needs to be adjusted based on the measured TA residual offset, but it cannot determine the propagation distance τ _delay between the base station and the terminal . In this case, it is difficult for the base station to determine an appropriate value of the timing offset K _offset .

In view of the above problems, the present application proposes a method for determining the timing of uplink transmission, which can simplify the configuration of the timing offset, and can better balance the impact of the timing offset on random access signaling overhead and round-trip delay (RTT, RoundTrip Time) impact. Please refer to FIG. 1, the method for determining the uplink transmission timing provided by the embodiment of the present invention is applied to the terminal, including:

Step 11, determine the uplink transmission timing through the timing offset K _offset , wherein the timing offset K _offset is determined according to the common timing advance common TA and a preset constant.

Here, the uplink transmission timing may include the uplink transmission timing of PUSCH or PUCCH, and the timing offset in the uplink transmission timing is determined according to a general timing advance and a preset constant.

According to at least one embodiment of the present invention, uplink transmission timing may be determined according to at least one of the following methods:

If the terminal receives the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal in time slot n, then the terminal in time slot n+K ₂ +Δ+ The physical uplink shared channel PUSCH is transmitted in K _offset , wherein K ₂ is a slot offset (slot offset), and Δ is a coefficient related to the subcarrier of PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the terminal receives the downlink control information DCI for scheduling PUSCH transmission in time slot n, and the time slot offset K ₂ is indicated in the DCI, then the terminal

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot in which the terminal receives the PDSCH is time slot n, the terminal transmits the PUCCH including the corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is the number of time slots.

Here, the timing offset K _offset can be determined according to the general timing advance common TA and a preset constant. common TA is the common time advance. Usually, the base station can select a reference point in each cell or beam coverage area, and determine the common TA according to the propagation delay from the reference point to the satellite. The base station may notify all terminals under the corresponding cell or beam of the common TA through a system message.

Through the above method, when the terminal in the embodiment of the present invention transmits PUSCH or PUCCH, it does not need to use different access processing according to its own terminal type (whether it has the ability to automatically estimate TA), but all use the timing offset determined in the same way. The PUSCH or PUCCH is sent in shifts, so that all terminals can use the same processing method, which avoids modification of signaling messages in the existing random access process, and simplifies the processing process of the network and the terminal.

According to at least one embodiment of the present invention, the preset constant includes at least: the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

In the embodiment of the present invention, the default timing offset may be determined according to the common TA and the maximum value of the adjustment range of the timing advance TA indicated by the RAR message.

According to the above analysis, the timing offset K _offset needs to be greater than or equal to twice the propagation delay τ _delay of the base station and the terminal. Note that the full TA (full TA) is equal to 2 times the delay τ _delay , namely:

full TA = 2τ _delay

Taking the timing relationship between the UL grant DCI and the scheduled PUSCH as an example, the influence of the size of the timing offset K _offset on the normal operation of the network and the RTT is further explained.

In the NR system, the time slot offset between the UL grant DCI and the scheduled PUSCH is recorded as K2. When K _offset is introduced, the time slot offset between the UL grant DCI and the scheduled PUSCH = K _offset + K2. Note that the time interval (T1) between UL grantDCI and scheduled PUSCH should be greater than or equal to full TA, which means:

T1＝K _offset +K2≥full TA

If K _offset <full TA, K2≥full TA-K _offset >0 is required.

Note that in the prior art, K2<15 is usually set. If full TA-K _offset > 15, it will cause K2 > 15, so the value of K2 may exceed the range it can indicate.

Based on the above analysis, please refer to FIG. 2 , if the K _offset is smaller than the full TA, it may exceed the indication range of uplink timing (ULtiming) and cause the NTN network to fail to work normally. In addition, it should be noted that K_offset is used in FIGS. 2-3 to represent the timing offset K _offset herein, and P represents the uplink and downlink conversion period.

Conversely, as shown in Figure 3, when the K _offset is greater than the full TA, the NTN network can work normally, but increasing the K _offset will also increase the RTT delay.

For example, if K _offset >full TA, it is required that K2≥(full TA-K _offset ), and (full TA-K _offset )<0. Therefore, as long as K _offset >full TA, the value range of K2 in the prior art does not need to be extended and can be used normally. The price of K _offset >full TA is that the data round-trip time delay (RTT) increases.

The method for determining uplink transmission timing provided by the embodiment of the present invention can be applied in the random access RACH process, or in the radio resource control RRC connection establishment (RRC connection establishment) process.

Based on the above analysis, in the random access stage, for the first type of terminal, the base station cannot accurately know the propagation distance τ _delay between the base station and the terminal. Therefore, a large timing offset K _offset can be used to make it It must be greater than or equal to the maximum full TA to ensure that the network can work normally.

In particular, since the random access phase is only a one-time short process, which has little impact on the overall network, it is not necessary to optimize the RTT delay in the random access phase.

Based on the above considerations, regardless of whether the base station can distinguish between two terminal types in the random access phase, the base station and the terminal in the embodiment of the present invention determine the timing offset K _offset in an implicit manner, and K _offset can be based on commonTA and The maximum value of the TA adjustment range indicated by the RAR is determined to ensure that K _offset is greater than or equal to the maximum value of the full TA of all terminals under the corresponding cell or beam.

The following provides a calculation method for calculating the above timing offset:

Among them, TA _common means common TA; α, β and C are all constants.

For example, C may be the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message. For example, in the prior art, a _TA field is carried in the RAR, where _TA =0, 1, 2, . . . , 3846. Then C=3846.

表示上取整，K_offset表示默认的定时偏移量。For example, α represents the conversion coefficient of the time unit of C relative to the time unit of common TA, and β represents the conversion coefficient of the time unit of K _offset relative to the unit of common TA; the operator

Indicates rounding up, and K _offset indicates the default timing offset.

In some embodiments of the present invention, the time unit of _{TA common} is the same as TA, which is S·16·64/2 ^μ ·T _c seconds, where T _c =1/(Δf _max ·N _f ), Δf _max = 480·10 ³ Hz, N _f = 4096. μ is a subcarrier spacing (SCS) configuration parameter, and the subcarrier spacing is 2μ·15kHz. S is a TA scaling factor, specifically a positive integer greater than or equal to 1.

In the above example,

Suppose the time unit of K _offset is slot, and the duration of each slot is 2- ^μ ms. In particular, when SCS=15kHz, μ=0, and the duration of each slot is 1ms. Then in this example,

In particular, when S=1, β=1920.

In some other embodiments, assuming that the time unit of K _offset is a frame (frrame), and the duration of each time slot (slot) is 10ms, then

In some other embodiments, it is assumed that the time unit of K _offset is an uplink-downlink period, or a combined uplink-downlink period. special,

的时间单位为上下行转换周期，持续P₁ ms；When the network adopts a single uplink and downlink conversion period, and the uplink and downlink conversion period lasts P ₁ ms,

The unit of time is the uplink and downlink conversion cycle, which lasts P ₁ ms;

When the network adopts two uplink and downlink conversion periods, and the two uplink and downlink conversion periods last for P ₁ ms and P ₂ ms respectively, the time unit of K _offset is the combined uplink and downlink conversion period, which lasts for P ₁ +P ₂ ms .

In the above example,

Wherein, the units of P ₁ and P ₂ are ms, which are the duration of the first and second uplink and downlink conversion cycles respectively.

In the embodiment of the present invention, after the terminal establishes a radio resource control RRC connection with the network, the network may also update the timing offset and send indication information to the terminal, so that the terminal updates the The above-mentioned timing offset K _offset .

For example, after the RRC connection is established, the base station may update a more accurate value of the timing offset to the terminal according to the type of the terminal and/or according to information reported by the terminal.

For example, for the second type of terminal, the base station can grasp the full TA information during the random access process, so it can indicate a more accurate value of K _offset without the terminal reporting any information.

For the first type of terminal, the base station does not know the full TA information during the random access process, so after the RRC connection is established, the base station can instruct the terminal to report some necessary information. Then, the base station calculates a more accurate K _offset value based on the information reported by the terminal, and configures it to the terminal through high-layer signaling.

Specifically, the terminal may report one or more of the following auxiliary information to the network after establishing a radio resource control RRC connection with the network before receiving the update value of the timing offset sent by the network:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

Wherein, the reference time is a time when a physical random access channel (PRACH) is sent or a time when the auxiliary information is reported.

Still taking Figure 3 as an example, when the terminal finds that the value of K _offset indicated by the base station is relatively large, it can further compress the value of K _offset , and update K _offset = K _offset -P in the following manner. Here, P represents the uplink and downlink conversion period.

It can be seen from the above that in the application of the timing offset in the embodiment of the present invention, a two-stage timing offset K _offset configuration method is adopted, wherein, in the random access process, the timing offset is used The default value of the amount, where the timing offset can be determined according to the TA indication range in common TA and RAR; after the RRC connection is established, for the first type of terminal, the base station can update and indicate the timing offset based on the information reported by the terminal The updated value of . Through the two-stage timing offset configuration, the embodiment of the present invention can achieve a better balance in terms of reducing random access signaling overhead and reducing RTT.

The method in the embodiment of the present invention has been described above from the terminal side. The method in the embodiment of the present invention is further introduced below from the base station side.

Referring to Fig. 4, the method for determining uplink transmission timing provided by the embodiment of the present invention, when applied to the base station side, includes:

Step 41: Determine the uplink transmission timing of the terminal through the timing offset K _offset , wherein the timing offset K _offset is determined according to the common TA and a preset constant.

Specifically, the uplink transmission timing of the terminal may be determined according to at least one of the following methods:

If the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal is sent to the terminal at time slot n, then it is determined that the terminal is in time slot n+K ₂ +Δ+K _offset transmits the physical uplink shared channel PUSCH, where K ₂ is the slot offset (slot offset), and Δ is a coefficient related to the subcarrier of the PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the downlink control information DCI for scheduling PUSCH transmission is sent to the terminal in time slot n, and the time slot offset K ₂ is indicated in the DCI, then it is determined that the terminal is in the time slot

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot of the PDSCH sent to the terminal is time slot n, it is determined that the terminal transmits a PUCCH including corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is time number of slots.

Through the above method, when the terminal in the embodiment of the present invention transmits PUSCH, it does not need to use different access processing according to its own terminal type (whether it has the ability to automatically estimate TA), but all use the timing offset determined in the same way The PUSCH or PUCCH is sent, so that all terminals can use the same processing method, which avoids modification of signaling messages in the existing random access process, and simplifies the processing process of the network and the terminal.

Further, after the above step 41, the base station may also determine the time slot for the terminal to send the PUSCH or PUCCH according to the uplink transmission timing, and receive the PUSCH or PUCCH sent by the terminal.

According to at least one embodiment of the present invention, the preset constant includes at least: the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

In the embodiment of the present invention, the timing offset may be determined according to the common TA and the maximum value of the adjustment range of the timing advance TA indicated by the RAR message. For the specific calculation method, reference may be made to the above description, which will not be repeated here.

The method for determining uplink transmission timing provided above may be applied to the random access RACH process of the terminal, or to the radio resource control RRC connection establishment (RRC connection establishment) process of the terminal.

After the base station establishes the RRC connection with the terminal, the base station may also send indication information to the terminal to update the timing offset K _offset .

Specifically, the timing offset K _offset may be updated in different ways for different terminal types:

For example, for the second type of terminal, the base station may update the timing offset according to the fullTA of the terminal obtained in the random access process;

For the first type of terminal, after establishing a radio resource control RRC connection with the terminal, the base station may receive auxiliary information sent by the terminal, and update the timing offset according to the auxiliary information. Wherein, the auxiliary information includes one or more of the following:

full TA at the reference time;

The difference TA between the full TA at the reference time and the common TA;

The reference time is the time when the PRACH is sent or the time when the auxiliary information is reported.

Various methods in the embodiments of the present invention have been introduced above. A device for implementing the above method will be further provided below.

Referring to FIG. 5, an embodiment of the present invention provides a terminal 50, including:

The uplink transmission timing determination module 51 is configured to determine the uplink transmission timing through a timing offset K _offset , wherein the timing offset K _offset is determined according to a general timing advance common TA and a preset constant.

Optionally, the uplink transmission timing determining module 51 is also configured to determine uplink transmission timing according to at least one of the following methods, including:

If the terminal receives the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal in time slot n, then the terminal in time slot n+K ₂ +Δ+ The physical uplink shared channel PUSCH is transmitted in K _offset , wherein K ₂ is a slot offset (slot offset), and Δ is a coefficient related to the subcarrier of PUSCH;

中传输PUSCH，其中，μ_PUsCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the terminal receives the downlink control information DCI for scheduling PUSCH transmission in time slot n, and the time slot offset K ₂ is indicated in the DCI, then the terminal

Transmit PUSCH in , wherein, μ _PUsCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot in which the terminal receives the PDSCH is time slot n, the terminal transmits the PUCCH including the corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is the number of time slots.

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

Optionally, the method for determining the uplink transmission timing is applied in a random access RACH process;

Alternatively, the method for determining the uplink transmission timing is applied in a radio resource control RRC connection establishment (RRC connection establishment) process.

Optionally, the preset constant includes at least: the maximum value of the adjustment range of the timing advance TA indicated by the RAR message.

Optionally, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

Optionally, the uplink transmission timing determination module determines the constants α and β in one of the following ways:

If the time unit of the timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S;

If the time unit of the timing offset is a frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the timing offset is the joint uplink-downlink conversion period, and the joint uplink-downlink conversion period includes two uplink-downlink conversion periods and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

Optionally, the terminal also includes:

The uplink transmission timing update module is configured to update the timing offset K _offset according to the indication information sent by the network after the terminal establishes a radio resource control RRC connection with the network.

Optionally, the uplink transmission timing updating module is further configured to, before updating the timing offset according to the indication information sent by the network, after the terminal establishes a radio resource control RRC connection with the network, also send a message to the network Report one or more of the following auxiliary information:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

Wherein, the reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported.

Please refer to FIG. 6 , which is a schematic structural diagram of a terminal provided by an embodiment of the present invention. The terminal 600 includes: a processor 601 , a transceiver 602 , a memory 603 , a user interface 604 and a bus interface.

In the embodiment of the present invention, the terminal 600 further includes: a program stored in the memory 603 and executable on the processor 601 .

When the processor 601 executes the program, the following steps are implemented:

The uplink transmission timing is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant.

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 601, each process of the method embodiment for determining the uplink transmission timing shown in FIG. 1 can be realized, and the same technical effect can be achieved. To avoid Repeat, no more details here.

In FIG. 6 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 601 and various circuits of memory represented by memory 603 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 602 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media. For different user equipments, the user interface 604 may also be an interface capable of connecting externally and internally to required devices, and the connected devices include but not limited to keypads, displays, speakers, microphones, joysticks, and the like.

The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 can store data used by the processor 601 when performing operations.

In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, and when the program is executed by a processor, the following steps are implemented:

The uplink transmission timing is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant.

An embodiment of the present invention provides a base station 70 shown in FIG. 7, including:

An uplink transmission timing determination module 71, configured to determine the uplink transmission timing through a timing offset K _offset , wherein the timing offset K _offset is determined according to a general timing advance common TA and a preset constant

Optionally, the uplink transmission timing determination module 71 is also configured to determine the uplink transmission timing of the terminal according to at least one of the following methods:

If the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal is sent to the terminal at time slot n, then it is determined that the terminal is in time slot n+K ₂ +Δ+K _offset transmits the physical uplink shared channel PUSCH, where K ₂ is the slot offset (slot offset), and Δ is a coefficient related to the subcarrier of the PUSCH;

中传输PUSCH，其中，μ_PUSCH和μ_PDCCH分别是PUSCH和PDCCH的子载波间隔配置(subcarrier spacing configuration)；If the downlink control information DCI for scheduling PUSCH transmission is sent to the terminal in time slot n, and the time slot offset K ₂ is indicated in the DCI, then it is determined that the terminal is in the time slot

Transmit PUSCH in , wherein, μ _PUSCH and μ _PDCCH are the subcarrier spacing configuration (subcarrier spacing configuration) of PUSCH and PDCCH respectively;

If the last time slot of the PDSCH sent to the terminal is time slot n, it is determined that the terminal transmits a PUCCH including corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is time slot number;

A receiving module, configured to receive the PUSCH or PUCCH sent by the terminal according to the time slot in which the terminal sends the PUSCH or PUCCH;

Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant.

Optionally, the method for determining the uplink transmission timing is applied to the random access RACH process of the terminal;

Alternatively, the method for determining the uplink transmission timing is applied in a radio resource control RRC connection establishment (RRC connection establishment) process of the terminal.

Optionally, the preset constant includes at least: the maximum value of the adjustment range of the timing advance TA indicated by the RAR message.

Optionally, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the adjustment range of the timing advance amount TA indicated by the RAR message.

Optionally, the uplink transmission timing determining module determines the constants α and β in one of the following ways:

If the time unit of the timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S;

If the time unit of the timing offset is a frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the timing offset is the joint uplink-downlink conversion period, and the joint uplink-downlink conversion period includes two uplink-downlink conversion periods and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

Optionally, the base station also includes:

An uplink transmission timing updating module, configured to send indication information to the terminal after the base station establishes a radio resource control RRC connection with the terminal, and update the timing offset K _offset .

Optionally, the base station also includes:

Update value calculation module for:

Update the timing offset according to the complete full TA of the terminal obtained in the random access process; or,

After establishing a radio resource control RRC connection with the terminal, receiving auxiliary information sent by the terminal, and updating the timing offset according to the auxiliary information;

Wherein, the auxiliary information includes one or more of the following:

The complete full TA at the reference moment;

The difference TA between the full TA at the reference time and the common TA;

The reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported.

Please refer to FIG. 8, an embodiment of the present invention provides a schematic structural diagram of a base station 800, including: a processor 801, a transceiver 802, a memory 803, and a bus interface, wherein:

In the embodiment of the present invention, the base station 800 further includes: a program stored in the memory 803 and operable on the processor 801, when the program is executed by the processor 801, the following steps are implemented:

The uplink transmission timing of the terminal is determined, wherein the uplink transmission timing includes a timing offset K _offset , and the timing offset K _offset is determined according to a general timing advance common TA and a preset constant.

It can be understood that, in the embodiment of the present invention, when the computer program is executed by the processor 801, each process of the method embodiment for determining the uplink transmission timing shown in FIG. 4 can be realized, and the same technical effect can be achieved. To avoid Repeat, no more details here.

In FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 801 and various circuits of memory represented by memory 803 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 802 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 when performing operations.

In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, and when the program is executed by a processor, the following steps are implemented:

The uplink transmission timing is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant.

When the program is executed by the processor, it can realize all the implementation methods in the method for determining the uplink transmission timing applied to the base station side, and can achieve the same technical effect. To avoid repetition, details are not repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (19)

1. A method for determining uplink transmission timing, which is applied to a terminal, is characterized in that, comprising: The uplink transmission timing is determined by a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant; Wherein, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the time advance amount TA adjustment range indicated by the RAR message; Wherein, the constants α and β are determined in one of the following ways: If the time unit of the default timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S; If the time unit of the default timing offset is frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the default timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the default timing offset is the joint uplink and downlink conversion period, and the joint uplink and downlink conversion period includes two uplink and downlink conversion periods, and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

Wherein, S is the TA scaling factor, μ is the subcarrier spacing SCS configuration parameter, T _c =1/(Δf _max ·N _f ), Δf _max =480·10 ³ Hz, N _f =4096. 2. The method of claim 1, wherein Determine the uplink transmission timing according to at least one of the following methods: If the terminal receives the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal in time slot n, then the terminal in time slot n+K ₂ +Δ+ The physical uplink shared channel PUSCH is transmitted in K _offset , where K ₂ is the time slot offset, and Δ is a coefficient related to the subcarrier of the PUSCH; If the terminal receives the downlink control information DCI for scheduling PUSCH transmission in time slot n, and the time slot offset K ₂ is indicated in the DCI, then the terminal

PUSCH is transmitted in , where μ _PUSCH and μ _PDCCH are the subcarrier spacing configurations of PUSCH and PDCCH respectively; If the last time slot in which the terminal receives the PDSCH is time slot n, the terminal transmits the PUCCH including the corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is the number of time slots. 3. The method of claim 1 or 2, wherein, The method for determining the uplink transmission timing is applied in the random access RACH process; Alternatively, the method for determining the uplink transmission timing is applied in the process of establishing a radio resource control (RRC) connection. 4. The method according to claim 1 or 2, wherein after establishing a radio resource control RRC connection with the network, the method further comprises: The terminal updates the timing offset K _offset according to the indication information sent by the network. 5. The method according to claim 4, wherein before updating the timing offset according to the indication information sent by the network, the method further comprises: After establishing a radio resource control RRC connection with the network, the terminal also reports one or more of the following auxiliary information to the network: The complete full TA at the reference moment; The difference TA between the full TA at the reference time and the common TA; Wherein, the reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported. 6. A method for determining uplink transmission timing, applied to a base station, characterized in that it comprises: Determine the uplink transmission timing of the terminal through the timing offset K _offset , wherein the timing offset K _offset is determined according to the general timing advance common TA and a preset constant; Wherein, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the time advance amount TA adjustment range indicated by the RAR message; Wherein, the constants α and β are determined in one of the following ways: If the time unit of the default timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S; If the time unit of the default timing offset is frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the default timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the default timing offset is the joint uplink-downlink conversion period, and the joint uplink-downlink conversion period includes two uplink-downlink conversion periods and lasts for P ₁ ms and P ₂ ms respectively, then α= 1,

Wherein, S is the TA scaling factor, μ is the subcarrier spacing SCS configuration parameter, T _c =1/(Δf _max ·N _f ), Δf _max =480·10 ³ Hz, N _f =4096. 7. The method of claim 6, wherein, Determine the uplink transmission timing of the terminal according to at least one of the following methods: If the physical downlink shared channel PDSCH containing the random access response RAR message corresponding to the physical random access channel PRACH transmission of the terminal is sent to the terminal at time slot n, then it is determined that the terminal is in time slot n+K ₂ +Δ+K _offset transmits the physical uplink shared channel PUSCH, where K ₂ is the time slot offset, and Δ is a coefficient related to the subcarrier of the PUSCH; If the downlink control information DCI for scheduling PUSCH transmission is sent to the terminal in time slot n, and the time slot offset K ₂ is indicated in the DCI, then it is determined that the terminal is in the time slot

PUSCH is transmitted in , where μ _PUSCH and μ _PDCCH are the subcarrier spacing configurations of PUSCH and PDCCH respectively; If the last time slot of the PDSCH sent to the terminal is time slot n, it is determined that the terminal transmits a PUCCH including corresponding HARQ-ACK information in time slot n+K ₁ +K _offset , where K ₁ is time slot number; receiving the PUSCH or PUCCH sent by the terminal according to the time slot in which the terminal sends the PUSCH or PUCCH; Wherein, the timing offset K _offset is determined according to the general timing advance common TA and a preset constant. 8. The method of claim 6 or 7, wherein, The method for determining the uplink transmission timing is applied to the random access RACH process of the terminal; Alternatively, the method for determining the timing of uplink transmission is applied in the establishment process of the radio resource control RRC connection of the terminal. 9. The method according to claim 6 or 7, wherein after the terminal establishes a radio resource control RRC connection with the base station, the method further comprises: Send indication information to the terminal, and update the timing offset K _offset . 10. The method according to claim 9, wherein before sending the indication information, the method further comprises: Update the timing offset according to the complete full TA of the terminal obtained in the random access process; or, After establishing a radio resource control RRC connection with the terminal, receiving auxiliary information sent by the terminal, and updating the timing offset according to the auxiliary information; Wherein, the auxiliary information includes one or more of the following: The complete full TA at the reference moment; The difference TA between the full TA at the reference time and the common TA; The reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported. 11. A terminal, characterized in that, comprising: An uplink transmission timing determination module, configured to determine uplink transmission timing through a timing offset K _offset , wherein the timing offset K _offset is determined according to a general timing advance common TA and a preset constant; Wherein, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the time advance amount TA adjustment range indicated by the RAR message; The uplink transmission timing determination module determines the constants α and β in one of the following ways: If the time unit of the default timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S; If the time unit of the default timing offset is frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the default timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the default timing offset is the joint uplink and downlink conversion period, and the joint uplink and downlink conversion period includes two uplink and downlink conversion periods, and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

Wherein, S is a TA scaling factor, μ is a subcarrier spacing SCS configuration parameter, T _c =1/(Δf _max ·N _f ), Δf _max =480·10 ³ Hz, N _f =4096. 12. The terminal according to claim 11, further comprising: The uplink transmission timing update module is configured to update the timing offset K _offset according to the indication information sent by the network after the terminal establishes a radio resource control RRC connection with the network. 13. The terminal according to claim 12, characterized in that, The uplink transmission timing update module is further configured to report the following auxiliary information to the network after the terminal establishes a radio resource control RRC connection with the network before updating the timing offset according to the indication information sent by the network One or more of: The complete full TA at the reference moment; The difference TA between the full TA at the reference time and the common TA; Wherein, the reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported. 14. A terminal, characterized by comprising: a processor, a memory, and a program stored on the memory and operable on the processor, when the program is executed by the processor, the program according to claim 1 is realized. Steps in the method for determining uplink transmission timing described in any one of 5 to 5. 15. A base station, characterized in that it comprises: An uplink transmission timing determination module, configured to determine the uplink transmission timing of the terminal through a timing offset K _offset , wherein the timing offset K _offset is determined according to a common timing advance common TA and a preset constant; Wherein, the timing offset K _offset is calculated according to the following formula:

Wherein, TA _common represents common TA; α, β and C are all constants, and C represents the maximum value of the time advance amount TA adjustment range indicated by the RAR message; The uplink transmission timing determination module determines the constants α and β in one of the following ways: If the time unit of the default timing offset is a time slot slot, and the duration of each time slot is 2- ^μ , then α=1, β=1920/S; If the time unit of the default timing offset is frame frame, and the duration of each frame is 10ms, then α=1,

If the time unit of the default timing offset is a single uplink and downlink conversion period, and the duration of the uplink and downlink conversion period is P ₁ ms, then α=1,

If the time unit of the default timing offset is the joint uplink and downlink conversion period, and the joint uplink and downlink conversion period includes two uplink and downlink conversion periods, and lasts for P ₁ ms and P ₂ ms respectively, then α=1,

Wherein, S is the TA scaling factor, μ is the subcarrier spacing SCS configuration parameter, T _c =1/(Δf _max ·N _f ), Δf _max =480·10 ³ Hz, N _f =4096. 16. The base station of claim 15, further comprising: An uplink transmission timing updating module, configured to send indication information to the terminal after the base station establishes a radio resource control RRC connection with the terminal, and update the timing offset K _offset . 17. The base station according to claim 16, further comprising: Update value calculation module for: Update the timing offset according to the complete full TA of the terminal obtained in the random access process; or, After establishing a radio resource control RRC connection with the terminal, receiving auxiliary information sent by the terminal, and updating the timing offset according to the auxiliary information; Wherein, the auxiliary information includes one or more of the following: The complete full TA at the reference moment; The difference TA between the full TA at the reference time and the common TA; The reference time is the time when the physical random access channel PRACH is sent or the time when the auxiliary information is reported. 18. A base station, characterized by comprising: a processor, a memory, and a program stored in the memory and operable on the processor, when the program is executed by the processor, the program according to claim 6 is implemented. Steps in the method for determining uplink transmission timing described in any one of 10 to 10. 19. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the uplink according to any one of claims 1 to 10 is realized. Steps of a method for determining transmission timing.

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