CN113766624A

CN113766624A - Timing advance indication and information receiving method, equipment, device and medium

Info

Publication number: CN113766624A
Application number: CN202010489610.8A
Authority: CN
Inventors: 周明宇; 云翔
Original assignee: Baicells Technologies Co Ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2021-12-07

Abstract

The invention discloses a timing advance indication and information receiving method, a device and a medium, comprising the following steps: the user equipment indicates a first timing advance value to a network side, wherein the user equipment determines a time difference between an initial time of an uplink frame of the user equipment and a receiving time of a corresponding downlink frame according to a target timing advance value, and the target timing advance value comprises: a first timing advance value and a base timing advance value, the first timing advance value being determined by the user equipment, the base timing advance value being preset. The network side determines a timing difference according to the first timing advance value, wherein the timing difference is a time difference between downlink transmission information and associated uplink transmission information; receiving associated uplink transmission information according to the timing difference; or, determining the difference timing advance of the user equipment according to the first timing advance value; indicating the differential timing advance to the user equipment; by adopting the invention, the situation that the user equipment cannot finish uplink transmission according to the indication of the new air interface node due to over-small timing difference can be avoided.

Description

Timing advance indication and information receiving method, equipment, device and medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a timing advance indication and information receiving method, device, apparatus, and medium.

Background

An NR (New Radio interface) system is currently designed for a terrestrial communication system, and an Uplink Timing Advance (Uplink Timing Advance) mechanism is used to ensure orthogonality of Uplink transmission and avoid interference in a cell. For a UE (User Equipment) farther from the gNB (NR Node B), due to a larger transmission delay, uplink data is transmitted earlier than for a UE closer to the gNB. Therefore, the purpose that uplink transmissions from different UEs in the same cell do not interfere with each other can be achieved.

The gNB can control the time when the uplink signal from different UEs arrives at the gNB by properly controlling the time offset when each UE transmits uplink information. In the UE side, the TA (Timing Advance) is a negative offset between the starting time of receiving the downlink subframe and the time of transmitting the uplink subframe, and the TA value is about twice the air propagation delay. The value of TA is indicated to the UE by the gNB, with two implementations:

(1) in the random access process, the gNB determines a TA value by detecting a preamble sequence sent by the UE, and sends TA information to the UE through a corresponding TA command field of random access.

(2) In the connected state of the radio link, the gNB maintains TA information for the UE. If a specific UE needs to correct TA, the gNB sends MAC CE (Media Access Control unit; MAC: Media Access Control; CE: Control Element) carrying TA command to the UE.

The gNB determines a TA value for each UE based on measuring uplink transmissions of the UEs. In theory, any signal (SRS (Sounding Reference signals)/DMRS (demodulation Reference signals)/UCI (Uplink Control Information)/PUSCH (Physical Uplink Shared Channel, etc.) transmitted by the UE may be used to measure the TA value.

The prior art has the disadvantage that when a non-terrestrial network communication system is involved, the base station cannot maintain the TA because the communication distance is long, and the UE cannot complete uplink transmission according to the instruction of the gNB.

Disclosure of Invention

The invention provides a timing advance indication and information receiving method, equipment, a device and a medium, which are used for solving the problem that a base station cannot maintain TA during long-distance transmission so that UE cannot finish uplink transmission according to the indication of gNB.

The embodiment of the invention provides a TA indicating method, which comprises the following steps:

the method comprises the steps that UE determines a first TA value in target TA values, wherein the UE determines the time difference between the starting time of an uplink frame and the receiving time of a corresponding downlink frame of the UE according to the target TA values, and the target TA values comprise: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

and the UE indicates the first TA value to a network side.

In implementation, the first TA value is determined by the UE according to its own location information and/or distance information between the UE and the gNB; or the like, or, alternatively,

the first TA value is a timing advance of a random access preamble sequence sent by the UE relative to a PRACH sending time.

In implementation, the UE indicates the first TA value to the network side in one or a combination of the following manners:

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

indicating distance information between the UE corresponding to the first TA value and the gNB;

indicating a first TA value according to an appointed mode of a network side in an implicit mode;

a quantized value indicative of the first TA value.

In an implementation, the base TA value includes:

and configuring the determined offset TA value according to the position of the frequency band where the uplink transmission is located and the duplex mode, and/or indicating the TA value determined by the TA command word of the UE through the gNB.

In an implementation, the method further comprises the following steps:

and receiving the timing difference indicated by the network side to the UE, wherein the timing difference is used for the UE to determine the time of uplink transmission.

In the implementation, the network side indicates the timing difference to the UE through scheduling indication information; or the like, or, alternatively,

indicating the timing difference to the UE in a configuration information semi-static configuration mode; or the like, or, alternatively,

and indicating the timing difference to the UE through a preset value between the UE and the UE.

In an implementation, the method further comprises the following steps:

and receiving a difference TA indicated by the network side to the UE, and maintaining the effective TA adjustment quantity by the UE according to the difference TA.

In an implementation, the method further comprises the following steps:

and receiving a parameter value of the UE indicated by the network side to the UE, and carrying out communication by the UE according to the parameter value.

The embodiment of the invention provides an information receiving method, which comprises the following steps:

a network side receives a first TA value indicated by UE, where the UE determines a time difference between an initial time of an uplink frame of the UE and a receiving time of a corresponding downlink frame according to the target TA value, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

after receiving a first TA value indicated by UE, a network side determines a first offset value according to the first TA value;

the network side determines a timing difference, wherein the timing difference is a time difference between first information and second information, the first information is downlink transmission information, the second information is uplink transmission information associated with the first information, the timing difference is not less than a target offset value, and the target offset value comprises the first offset value and a basic offset value corresponding to a basic TA value;

receiving the second information according to the timing difference;

alternatively, the first and second electrodes may be,

after receiving a first TA value indicated by UE, a network side determines a difference TA of the UE according to a target public reference TA, wherein the first TA value is the target public reference TA determined by the UE;

the difference TA is indicated to the UE.

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

In implementation, when the network side determines the first offset value according to the first TA value, the network side determines the actual air propagation delay between the gNB and the UE according to the first TA value, the PRACH time configured by the network side, and the time when the network side detects the Preamble.

In implementation, the first information and the second information are in one of the following corresponding relations:

the first information is information carried on a physical downlink control channel carrying uplink scheduling authorization, and the second information is information carried on a PUSCH; or the like, or, alternatively,

the first information is information carried on the random access response, and the second information is information carried on the PUSCH; or the like, or, alternatively,

the first information is information carried on a physical downlink control channel carrying downlink scheduling authorization, and the second information is information carried on HARQ-ACK; or the like, or, alternatively,

the first information is information carried on a reference resource fed back by the CSI, and the second information is information carried on the CSI; or the like, or, alternatively,

the first information is information carried on a physical downlink control channel triggering aperiodic CSI reporting, and the second information is information carried on a PUSCH of the aperiodic CSI; or the like, or, alternatively,

the first information is information loaded on a physical downlink control channel which triggers the reporting of the aperiodic SRS, and the second information is information loaded on the aperiodic SRS.

In the implementation, after the network side determines the timing difference, the method further includes:

indicating the timing difference to the UE.

In the implementation, after the network side receives the first TA value indicated by the UE, the method further includes:

determining the actual air propagation delay between the UE and the gNB according to the time for receiving the first TA value;

determining the effective time of the MAC CE information at the UE side according to the propagation delay;

and determining the parameter value of the UE according to the effective time of the MAC CE information on the UE side.

The embodiment of the invention provides a UE, which comprises:

a processor for reading the program in the memory, performing the following processes:

determining a first TA value in target TA values, wherein the UE determines a time difference between the starting time of an uplink frame of the UE and the receiving time of a corresponding downlink frame according to the target TA values, and the target TA values comprise: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

indicating the first TA value to a network side;

a transceiver for receiving and transmitting data under the control of the processor.

In implementation, the first TA value is indicated to the network side in one or a combination of the following ways:

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

In an implementation, the base TA value includes:

In an implementation, the method further comprises the following steps:

and receiving a difference TA indicated by the network side to the UE, and maintaining an effective TA adjustment amount according to the difference TA.

In an implementation, the method further comprises the following steps:

and receiving a parameter value of the UE indicated by the network side to the UE, and carrying out communication according to the parameter value.

An embodiment of the present invention provides a network side device, including:

receiving a first TA value indicated by UE, wherein the UE determines a time difference between the starting time of an uplink frame of the UE and the receiving time of a corresponding downlink frame according to the target TA value, and the target TA value comprises: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

after receiving a first TA value indicated by the UE, the network side determines a first offset value according to the first TA value;

determining a timing difference, wherein the timing difference is a time difference between first information and second information, the first information is downlink transmission information, the second information is uplink transmission information associated with the first information, the timing difference is not less than a target offset value, and the target offset value comprises the first offset value and a basic offset value corresponding to a basic TA value;

receiving the second information according to the timing difference;

alternatively, the first and second electrodes may be,

after receiving a first TA value indicated by UE, determining a difference TA of the UE according to a target public reference TA, wherein the first TA value is the target public reference TA determined by the UE;

indicating the difference value TA to the UE;

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

In an implementation, after determining the timing difference, the method further includes:

indicating the timing difference to the UE.

In implementation, the timing difference is indicated to the UE through scheduling indication information; or the like, or, alternatively,

In the implementation, after receiving the first TA value indicated by the UE, the method further includes:

The embodiment of the invention provides a TA indicating device, which comprises:

a UE determining module, configured to determine a first TA value in a target TA value, where the UE determines, according to the target TA value, a time difference between a starting time of an uplink frame of the UE and a receiving time of a corresponding downlink frame, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

and the UE indicating module is used for indicating the first TA value to a network side.

An embodiment of the present invention provides an information receiving apparatus, including:

a network side receiving module, configured to receive a first TA value indicated by the UE, where the UE determines, according to the target TA value, a time difference between a starting time of an uplink frame of the UE and a receiving time of a corresponding downlink frame, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

the network side first determining module is used for determining a first offset value according to a first TA value after receiving the first TA value indicated by the UE;

a second determining module on the network side, configured to determine a timing difference, where the timing difference is a time difference between first information and second information, the first information is downlink transmission information, the second information is uplink transmission information associated with the first information, the timing difference is not less than a target offset value, and the target offset value includes a first offset value and a base offset value corresponding to a base TA value;

a network side receiving module, configured to receive the second information according to the timing difference;

alternatively, the first and second electrodes may be,

a third determining module on the network side, configured to determine a difference TA of the UE according to a target common reference TA after receiving a first TA value indicated by the UE, where the first TA value is the target common reference TA determined by the UE;

and the network side indicating module is used for indicating the difference value TA to the UE.

The embodiment of the invention provides a computer readable storage medium, which stores a computer program for executing the TA indicating method and/or the information receiving method.

The invention has the following beneficial effects:

in the technical solution provided in the embodiment of the present invention, since the terminal sends the first TA value for indicating that the UE determines autonomously in the TA values, the gNB can obtain the actual air propagation delay between the UE and the gNB, so that the gNB can determine the timing difference, which is the time difference between the first information and the second information. The first information is a downlink transmission and the second information is an uplink transmission associated with the first information. Therefore, the situation that the UE cannot complete uplink transmission according to the indication of the gNB due to too small timing difference can be avoided.

Further, because the gNB can obtain the actual air propagation delay between the UE and the gNB, the gNB can also determine the target common reference TA selected by the UE according to the indication information, and then can maintain an effective TA adjustment amount for the UE according to the UE difference TA determined by the target common reference TA, thereby ensuring the effectiveness of uplink transmission of the UE.

Further, because the gNB can acquire the actual air propagation delay between the UE and the gNB, the gNB can also take the effective time of the MAC CE information on the UE side, thereby avoiding the "MAC CE configuration ambiguity period".

Further, each UE can pre-compensate N by determining autonomously_{TA_pre}Therefore, the gNB can be ensured to maintain the uplink information sending timing of the UE in a wider coverage range within a certain TA command word range, and the gNB is ensured to support wider coverage.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of TA during data transmission according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a time relationship during data transmission according to an embodiment of the present invention 1;

FIG. 3 is a schematic diagram of a time relationship during data transmission according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a TA indication method at the UE side according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of TA indication in accordance with an embodiment of the present invention;

FIG. 6 shows a diagram of T in the first embodiment of the present invention_TAA time diagram of (a);

fig. 7 is a schematic flow chart of an implementation of an information receiving method on a network side in an embodiment of the present invention;

fig. 8 is a schematic flow chart illustrating an implementation of a method for indicating a difference TA to a UE by a network side according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a MAC CE configuration according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating a UE structure according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network-side device in an embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

non-terrestrial network communication has a wider coverage than terrestrial communication systems, and the transmission delay between the terminal device and the network device is much longer than in the case of terrestrial communication, possibly up to several hundred milliseconds. Accordingly, the value of TA will be very large.

Fig. 1 is a schematic diagram of TA during data transmission, and as shown in the figure, in order to control the uplink transmission orthogonality through TA in a scenario with a large coverage area, such as non-terrestrial communication, the following two methods are generally adopted:

first, when the UE transmits the preamble sequence/other uplink information, the transmission time is autonomously advanced by a certain amount of time compared to the PRACH (Physical Random Access Channel) time configured by the gNB/uplink information transmission time, and is recorded as a pre-compensation TA value N_{TA_pre}. The gNB determines the TA command sent to the UE by detecting the preamble sequence/other uplink information. In this way, the TA information sent by the gNB to the UE indicates twice the length of the virtual air propagation delay, which is the air propagation delay of the UE and the gNB divided by N_{TA_pre}The outer part, denoted by N_{TA_diff}。

And the second method comprises the following steps: the gNB indicates a common reference TA for the UE, and indicates a difference value TA with respect to the common reference TA to the UE through a TA command word. The UE actually uses the TA value as the sum of the common reference TA and the difference TA. For a certain UE, the common reference TA used by the UE is recorded as a pre-compensation TA value N_{TA_pre}. If the gNB indicates multiple common reference TAs for the UE, thenThe UE determines one common reference TA from a plurality of common reference TAs.

In both the first and second modes, the TA value actually used for uplink transmission of the UE is N_{TA_pre}+N_{TA_diff}. Wherein N is_{TA_diff}The gNB indicates to the UE through the TA command, and the gNB determines N for the UE_{TA_pre}Nothing is known.

Fig. 2 is a schematic diagram of the timing relationship of data transmission 1, and as shown in the NR system design, most of the uplink transmission is triggered by the downlink transmission associated with it. For example, the PUSCH transmission is scheduled by a physical downlink control channel carrying an uplink scheduling grant or by a random access response sent by the gNB; a Physical Uplink Control Channel (PUCCH) for feeding back a Hybrid automatic repeat request acknowledgement (HARQ-ACK) is scheduled by a Physical downlink Control Channel (pdcch) carrying a downlink scheduling grant; the CSI (Channel State Information) feedback of the UE is based on CSI-RS (CSI Reference Signal) measurement sent by the gNB; aperiodic CSI/SRS (Sounding Reference signals) feedback is triggered based on physical downlink control information, and the like.

Assuming that a downlink transmission is at a first time and an associated uplink transmission is at a second time, the time difference between the second time and the first time is referred to as a timing difference. The UE sends out uplink transmission for the second time at the third time. The third time is earlier than the second time by a time of TA/2.

Because the gNB needs to experience the air propagation delay before the downlink transmission reaches the UE side at the first time, the UE side detects the downlink transmission and can determine the uplink transmission associated with the downlink transmission at the second time, the UE starts to send the uplink transmission corresponding to the second time at the third time, and the third time is earlier than the second time by the air propagation delay. Therefore, the value of the timing difference must not be less than twice the air propagation delay, and the UE can complete the associated uplink transmission according to the gbb downlink transmission.

However, if a part of the TA values of the UE side is determined autonomously by the UE, the gNB cannot determine the transmission time of the uplink transmission of the UE, and thus cannot measure the transmission timeMeasuring the actual air propagation delay between the UE and the gNB. When uplink transmission is triggered through downlink transmission, the gNB cannot determine how large the value of the timing difference can meet the requirement of the time delay not less than twice the air propagation time delay, which may cause the situation that the UE cannot complete the uplink transmission according to the indication of the gNB. Taking uplink scheduling authorization to schedule PUSCH as an example, the air propagation delay determined by gNB and between the gNB and the UE is virtual air propagation delay N_{TA_diff}. With this as a limit, the timing difference X between the uplink scheduling grant and the PUSCH is 4 time units, and after the uplink scheduling grant is expected to be transmitted by the gNB, the PUSCH transmitted by the UE is received after experiencing the timing difference.

But the air propagation delay between UE and gbb is much larger than N_{TA_diff}The corresponding time. When the uplink scheduling grant reaches the UE, the time for the UE to send the PUSCH has passed, so that the UE cannot complete the associated PUSCH transmission as indicated by the gNB.

Fig. 3 is a schematic diagram of a time relationship during data transmission, as shown in fig. 2, if the gNB is adopted to indicate a common reference TA for the UE, and the gNB maintains the TA value of the UE by randomly accessing a corresponding TA command word to indicate a difference TA with respect to the common reference TA to the UE. Under the condition that the gNB indicates a plurality of common reference TAs for the UE, if the UE autonomously selects one common reference TA from the plurality of common reference TAs and the gNB does not determine the common reference TA selected by the UE, the gNB cannot maintain a difference TA for the UE, thereby ensuring the effectiveness of uplink transmission of the UE.

Based on the above, the invention provides a scheme of timing advance indication and information reception, which can be used for a non-ground network communication system with a longer communication distance, and can ensure correct communication and system efficiency of network equipment and terminal equipment by indicating information for indicating a pre-compensation TA value to the network equipment through UE.

The following describes embodiments of the present invention with reference to the drawings.

In the description process, the implementation of the UE and the gNB side will be described separately, and then an example of the implementation of the UE and the gNB side in cooperation will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together or separately, and actually, when the UE and the gNB are implemented separately, the UE and the gNB solve the problems of the UE side and the gNB side, respectively, and when the UE and the gNB are used in combination, a better technical effect is obtained.

Fig. 4 is a schematic diagram of a TA indication method at the UE side, as shown in the figure, the TA indication method may include:

step 401, the UE determines a first TA value of target TA values, wherein the UE determines a time difference between an initial time of an uplink frame of the UE and a receiving time of a corresponding downlink frame according to the target TA value, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

step 402, the UE indicates the first TA value to the network side.

Fig. 5 is a TA indication diagram, as shown in the figure, the UE determines a time difference between a starting time of an uplink frame of the UE and a receiving time of a corresponding downlink frame according to a target TA value, where the target TA value includes the first TA value and a base TA value; and sending indication information, wherein the indication information is used for indicating the first TA value.

The time difference is determined, and the time difference and the sending indication information have no time sequence relation in implementation and do not distinguish the sequence.

In particular, the first TA value is autonomously determined by the UE.

The UE may autonomously determine the first TA value according to its own location information or distance information with the gNB.

Or, the first TA value is a timing advance of a Random Access preamble sequence transmitted by the UE with respect to a PRACH (Physical Random Access Channel) transmission time.

In an implementation, the base TA value includes:

Specifically, the basic TA value is preset, and the specific implementation will be described in example one.

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

Specifically, the indication information is used to indicate the first TA value, the indication information may directly indicate the first TA value, or may be represented by a parameter corresponding to the first TA value, for example, the indication information indicates location information of the UE, or distance information between the UE and the gNB, and the gNB may estimate the first TA value through the indication information. Alternatively, the indication information may implicitly indicate the first TA value.

Alternatively, the indication information is used to indicate a quantized value of the first TA value.

The first embodiment is as follows:

the terminal equipment side TA indication implementation may be as follows:

FIG. 6 shows T in the first embodiment_TAAs shown in the figure, as seen from the UE side, TA is a negative offset (negative offset) between the starting time of receiving the downlink subframe and the time of transmitting the uplink subframe. At the UE side, the starting time of the uplink frame i is T earlier than the starting time of the corresponding downlink frame received by the UE correspondingly_TATime of (d).

Target TA value is T_TA，T_TA＝(N_{TA_pre}+N_TA+N_TA,offset)T_CThe first TA value is N_{TA_pre}The first TA time is N_{TA_pre}T_C(ii) a Basic TA value of N_TA+N_TA,offsetThe basic TA time is (N)_TA+N_TA,offset)T_C。

Wherein N is_TA,offsetThe uplink transmission mode may be configured and determined according to a Frequency band location where uplink transmission is located and a Duplex mode, for example, at least one possible mode is that a specific parameter value may be determined with reference to table 7.1.2-2 of 3GPP TS 38.133 V16.0.0, for example, a TDD (Time Division Duplex) mode is adopted, a Frequency band is a low Frequency FR (Frequency range)1, and if there is coexistence of NR-LTE (Long Term Evolution), a value is 0; a TDD (Frequency Division Duplex) or FDD (Frequency Division Duplex) mode is adopted, and if the Frequency band is FR1 and no NR-LTE coexists, the value is 25600, which can also be regarded as a preset value. N is a radical of_TAThe TA command word indicated to the UE by the gNB. Or, alternatively, N_TA＝0。

For non-terrestrial network communication systems, N is autonomously determined if the time at which the UE sends the preamble/other uplink information_{TA_pre}The gNB can only measure the virtual air propagation delay between the UE and the gNB, and cannot determine the actual air propagation delay between the gNB and the UE.

By sending the indication information for indicating the first TA value to the gNB, the gNB can acquire the actual air propagation delay between the gNB and the UE, so that the gNB can determine the value of the timing difference, and the situation that the UE cannot complete uplink transmission according to the indication of the gNB due to the fact that the gNB cannot determine how large the value of the timing difference can meet the requirement of not less than twice the air propagation delay is avoided.

In specific implementation, the gNB may determine the actual air propagation delay between the gNB and the UE according to the first TA value, the PRACH time configured by the gNB, the time for detecting the Preamble (Preamble), and the like.

In specific implementation, for a non-terrestrial network communication system, considering that the air propagation delay between the UE and the gNB is large, the start time of the uplink frame i at the UE side is T earlier than the start time of the corresponding downlink frame correspondingly received by the UE_TATime of, the T_TATime of (1) divided by N_TA,offsetThe corresponding time may be determined by the UE according to its own location information, or according to distance information between the UE and the gNB. I.e. the base TA value comprises only N_TA,offsetIs prepared fromAnd (4) presetting.

In this case, the gNB cannot determine the actual air propagation delay between the gNB and the UE. The UE sends the indication information for indicating the first TA value to the gNB, so that the gNB can acquire the actual air propagation delay between the gNB and the UE, the gNB can conveniently determine the value of the timing difference, the requirement that the timing difference is not less than two times the air propagation delay is met, and the condition that the UE cannot finish uplink transmission according to the indication of the gNB is avoided.

In this embodiment, the time difference is determined, and there is no time sequence relationship with the transmission indication information in implementation, and the sequence is not distinguished.

In this embodiment, the indication information is used to indicate the first TA value, the indication information may directly indicate the first TA value, or may be represented by a parameter corresponding to the first TA value, for example, location information of the UE, or distance information between the UE and the gNB, and the gNB may determine the first TA value through the indication information.

In implementation, the indication information is used to indicate a quantization value of the first TA value, and the quantization granularity value does not affect the implementation of the embodiment of the present invention.

The following describes the implementation of the network side.

Fig. 7 is a schematic flow chart of an implementation of an information receiving method on a network side, as shown in the figure, the method may include:

step 701, a network side receives a first TA value indicated by UE, where the UE determines a time difference between an initial time of an uplink frame of the UE and a receiving time of a corresponding downlink frame according to the target TA value, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

step 702, the network side determines a first offset value according to the first TA value;

step 703, the network side determines a timing difference, where the timing difference is a time difference between first information and second information, the first information is downlink transmission information, the second information is uplink transmission information associated with the first information, the timing difference is not less than a target offset value, and the target offset value includes the first offset value and a basic offset value corresponding to a basic TA value;

step 704, receiving the second information according to the timing difference.

Specifically, a network side receives indication information, where the indication information is used to indicate a first TA value; then determining a first offset value according to the indication information; determining a timing difference, wherein the timing difference is a time difference between first information and second information, the first information is downlink transmission, the second information is uplink transmission associated with the first information, the timing difference is not less than a target offset value, and the target offset value comprises a first offset value and a basic offset value; the second information may be received based on the timing difference.

Accordingly, in implementation, the UE indicates the first TA value to the network side in one of the following manners or a combination thereof:

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

In implementation, when the network side determines the first offset value according to the first TA value, the network side determines the actual air propagation delay between the gNB and the UE according to the first TA value, the PRACH time configured by the network side, and the time when the network side detects the Premable.

the first information is information carried on a physical downlink control channel carrying downlink scheduling grant, and the second information is information carried on a Hybrid automatic repeat request acknowledgement (HARQ-ACK); or the like, or, alternatively,

indicating the timing difference to the UE.

Correspondingly, on the UE side:

in the implementation, the method can further comprise the following steps:

The following is a description by way of example.

Example two:

the information receiving implementation of the network device side may be as follows:

corresponding to the UE-side embodiment, the gNB may obtain the indication information sent by the UE, and may determine the first TA value, thereby determining the actual air propagation delay between the gNB and the UE. Therefore, when uplink transmission is triggered through downlink transmission, the gNB can determine the value of the timing difference between the first information and the second information, so that the timing difference is not less than a target offset value, namely not less than twice the length of the actual transmission delay between the gNB and the UE, and the condition that the UE cannot complete the uplink transmission according to the indication of the gNB is avoided.

The first information is a downlink transmission and the second information is an uplink transmission associated with the first information. For example, the first information and the second information may be a combination of any one of the following lines:

in current NR system designs, a first TA value N_{TA_pre}0. The gNB may ensure that the configured or scheduled timing difference is not less than the sum of the basic TA time and the time value required by the processing capability of the UE (basic offset value).

The base TA time corresponds to the base offset value. For example, if the time difference between the physical downlink control channel carrying the uplink scheduling grant and the scheduled PUSCH thereof is K according to the design of the current NR system₁Guarantee K₁Not less than the base offset values of the gbb and the UE. The gNB determines that the timing difference information is indicated to the UE.

In this embodiment, considering the real air propagation delay between the UE and the gNB includes the uplink transmission advance value determined autonomously by the UE, which is the first TA value, and the time difference between the first information and the second information is increased by the "first offset value" (K) based on the current NR system design_offset) The value of (c). The first offset value corresponds to a first TA value. Then in this embodiment, the time difference between the physical downlink control channel of the uplink scheduling grant determined by the gNB and the scheduled PUSCH thereof is K₁+K_offset. The gNB can determine K according to the first TA value_offsetAnd taking K as a value_offsetThe value of (2) is indicated to the UE so that the UE determines the time of uplink transmission.

Alternatively, when the gNB determines the timing difference, considering that the timing difference is not less than the sum of the first offset value and the base offset value,timing difference K to be determined₁′＝K₁+K_offsetAnd indicating to the UE. The timing difference may be sent by the gNB to the UE through the scheduling indication information, may be configured by the configuration information in a semi-static manner, and may be a preset value between the gNB and the UE. The present embodiment does not limit the manner in which the gNB indicates the timing difference to the UE.

The UE sends the indication information for indicating the first TA value to the gNB, so that the gNB can acquire the actual air propagation delay between the gNB and the UE, the gNB can conveniently determine the value of the timing difference, the time delay requirement of not less than two times of the air propagation delay is met, and the condition that the UE cannot finish uplink transmission according to the indication of the gNB is avoided.

In addition, each UE pre-compensates N by autonomously determining_{TA_pre}The gNB can be ensured to maintain the uplink information sending timing of the UE in a wider coverage range within a certain TA command word range, and the gNB is ensured to support wider coverage.

And II, implementing the difference value TA.

Fig. 8 is a schematic flowchart of an implementation of a method for indicating a difference TA to a UE on a network side, where as shown in the figure, the method may include:

step 801, a network side receives a first TA value indicated by a UE, wherein the UE determines a time difference between an initial time of an uplink frame of the UE and a corresponding downlink frame receiving time according to the target TA value, and the target TA value includes: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

step 802, determining a difference TA of the UE according to a target common reference TA, where the first TA value is the target common reference TA determined by the UE;

step 803 indicates the difference TA to the UE.

In the implementation, after the network side receives the first TA value indicated by the UE, the method may further include: determining a difference TA of the UE according to the target public reference TA, wherein the first TA value is the target public reference TA determined by the UE; the difference TA is indicated to the UE.

Specifically, a network side receives indication information, where the indication information is used to indicate a first TA value, and the first TA value is a target common reference TA determined by a UE; determining a difference TA of the UE according to the target public reference TA; then indicating the difference value TA to the UE;

correspondingly, on the UE side:

the method can further comprise the following steps:

The following is an example.

Example three:

in this embodiment, the implementation on the terminal device side may refer to embodiment one, and is not described again.

The implementation on the network device side may be as follows:

if the gNB indicates the common reference TA for the UE, the gNB indicates the TA value of the UE to be maintained by the difference TA relative to the common reference TA to the UE through the TA command word, and under the condition that the gNB indicates a plurality of common reference TAs for the UE, the UE autonomously selects one of the plurality of common reference TAs as a first TA value.

The UE sends the first TA value to the gNB through the indication information. The gNB may indicate a difference TA of the UE with respect to the common TA for the UE based on the first TA value. And the time of sending the leader sequence/other uplink information by the UE represents the public TA time corresponding to the first TA value.

Or the UE does not show the common TA time corresponding to the first TA value in the time for sending the preamble sequence/other uplink information, and the gNB determines the time for detecting the preamble sequence/other uplink information according to the first TA value.

And the gNB determines the target public reference TA selected by the UE according to the indication information, and then can maintain effective TA adjustment quantity for the UE according to the UE difference TA determined by the target public reference TA, so as to ensure the effectiveness of the UE uplink transmission.

And thirdly, implementing parameter values.

Specifically, a network side receives indication information, where the indication information is used to indicate a first TA value; then determining the effective time of the MAC CE information at the UE side; and determining the value of the parameter of the UE according to the effective time of the MAC CE information at the UE side.

Correspondingly, on the UE side:

the method can further comprise the following steps:

The following is an example.

Example four:

for implementation on the terminal device side, reference may be made to embodiment one, which is not described again.

The implementation on the network device side may be as follows:

when the PDSCH sent by the gNB to the UE carries MAC CE information, the effective time of the MAC CE on the UE side may be determined by the time when the UE sends the PUCCH corresponding to the HARQ-ACK for the PDSCH and the actual air propagation delay between the UE and the gNB.

Under the condition that the gNB cannot determine the actual air propagation delay between the UE and the gNB, the gNB cannot determine the effective time of the MAC CE information on the UE side, and cannot determine what time the MAC CE information can communicate with the UE according to the parameter value configured by the MAC CE information.

Fig. 9 is a schematic diagram of MAC CE configuration, and as shown in the diagram, the UE determines the time of the MAC CE according to the PUCCH time of HARQ-ACK corresponding to the PDSCH carrying the MAC CE and the actual air propagation delay between the UE and the gNB.

gNB has no N_{TA_pre}Information, can only be based on (N)_TA+N_TA,offset)T_CEstimate the effective time of the UE side to the MAC CE. Therefore, the effective time of the MAC CE determined by the gNB at the UE is different from the effective time of the MAC CE actually at the UE side, so that the values of the relevant parameters of the MAC CE corresponding to the gNB and the UE are different within a period of "MAC CE configuration fuzzy period", which causes the communication quality between the gNB and the UE to be reduced or even fail.

In this embodiment, the gNB acquires the first TA value from the UE, and may determine the effective time of the MAC CE information on the UE side, thereby avoiding the "MAC CE configuration ambiguity period".

Based on the same inventive concept, the embodiment of the present invention further provides a base station side device, a user equipment, a TA indication apparatus, an information receiving apparatus, and a computer readable storage medium, and because the principle of solving the problem of these devices is similar to the TA indication method and the information receiving method, the implementation of these devices may refer to the implementation of the method, and the repeated parts are not described again.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 10 is a schematic structural diagram of a UE, and as shown in the figure, the UE includes:

the processor 1000, which is used to read the program in the memory 1020, executes the following processes:

indicating the first TA value to a network side;

a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

In an implementation, the base TA value includes:

In an implementation, the method further comprises the following steps:

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 1030 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

In specific implementation, refer to the implementation of the TA indication method on the UE side.

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

Fig. 11 is a schematic structural diagram of a network-side device, and as shown in the figure, a base station includes:

the processor 1100, which reads the program in the memory 1120, performs the following processes:

receiving the second information according to the timing difference;

alternatively, the first and second electrodes may be,

indicating the difference value TA to the UE;

a transceiver 1110 for receiving and transmitting data under the control of the processor 1100.

indicating a first TA value;

indicating a parameter corresponding to a first TA value;

indicating location information of the UE corresponding to the first TA value;

a quantized value indicative of the first TA value.

indicating the timing difference to the UE.

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

alternatively, the first and second electrodes may be,

In specific implementation, reference may be made to implementation of the information receiving method on the network side.

In specific implementation, refer to the foregoing implementation of the TA indication method on the UE side and/or the information receiving method on the network side.

In summary, in the technical solution provided in the embodiment of the present invention, the terminal sends the first TA value for indicating that the UE determines autonomously from among the TA values, so that the gNB can obtain the actual air propagation delay between the UE and the gNB, and the gNB can determine the timing difference conveniently, where the timing difference is the time difference between the first information and the second information. The first information is a downlink transmission and the second information is an uplink transmission associated with the first information. Thus, the situation that the UE cannot complete uplink transmission according to the indication of the gNB due to the excessively small timing difference can be avoided.

The gNB can also determine a target public reference TA selected by the UE according to the indication information, and then can maintain an effective TA adjustment amount for the UE according to a UE difference TA determined by the target public reference TA, so as to ensure the effectiveness of UE uplink transmission.

The gNB can also obtain the effective time of the MAC CE information at the UE side, so as to avoid the 'MAC CE configuration fuzzy period'.

Each UE pre-compensates N by autonomously determining_{TA_pre}The gNB can be ensured to maintain the uplink information sending timing of the UE in a wider coverage range within a certain TA command word range, and the gNB is ensured to support wider coverage.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for Timing Advance (TA) indication, comprising:

user Equipment (UE) determines a first TA value in target TA values, wherein the UE determines the time difference between the starting time of an uplink frame and the receiving time of a corresponding downlink frame of the UE according to the target TA values, and the target TA values comprise: a first TA value and a base TA value, the first TA value being determined by the UE, the base TA value being preset;

and the UE indicates the first TA value to a network side.

2. The method of claim 1, wherein the first TA value is determined by the UE according to its location information and/or distance information between the UE and a new air interface node, gbb; or the like, or, alternatively,

the first TA value is the timing advance of the random access preamble sequence sent by the UE relative to the sending time of the physical random access channel PRACH.

3. The method of any of claims 1 to 2, further comprising:

4. The method of any of claims 1 to 2, further comprising:

5. An information receiving method, comprising:

receiving the second information according to the timing difference;

alternatively, the first and second electrodes may be,

the difference TA is indicated to the UE.

6. A UE, comprising:

indicating the first TA value to a network side;

7. A network-side device, comprising:

receiving the second information according to the timing difference;

alternatively, the first and second electrodes may be,

indicating the difference value TA to the UE;

8. A TA indication apparatus, comprising:

9. An information receiving apparatus, comprising:

alternatively, the first and second electrodes may be,

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 5.