CN114615734B - Transmission method of TA in wireless communication, electronic equipment and storage medium - Google Patents
Transmission method of TA in wireless communication, electronic equipment and storage medium Download PDFInfo
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- CN114615734B CN114615734B CN202210256131.0A CN202210256131A CN114615734B CN 114615734 B CN114615734 B CN 114615734B CN 202210256131 A CN202210256131 A CN 202210256131A CN 114615734 B CN114615734 B CN 114615734B
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- base station
- user terminal
- adjustment
- pdsch data
- time window
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a transmission method of a TA in wireless communication, electronic equipment and a storage medium, and relates to the technical field of wireless communication. The transmission method is that after finishing TA measurement and calculation, when the base station prepares to issue TA adjustment quantity to the user terminal, judging whether pdsch data transmission exists between the base station and the user terminal currently, if so, the base station issues the TA adjustment quantity to the user terminal together with the pdsch data, otherwise, setting a TA issue time window, judging whether pdsch data transmission exists between the base station and the user terminal currently in the TA issue time window, if so, the base station issues the TA adjustment quantity to the user terminal together with the pdsch data, otherwise, the base station issues the TA adjustment quantity to the user terminal independently. The invention is provided with the TA issuing time window, and when the TA is sent together with the pdsch data, the pdsch and the pdcch resources are saved, thereby improving the frequency spectrum utilization rate of the base station.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a TA transmission method in wireless communications, an electronic device, and a storage medium.
Background
In a wireless communication system, TA is a time advance of UE terminal uplink channel (PUSCH/PUCCH/SRS/DMRS) signal transmission. The base station calculates the difference between the expected TA value and the current measured TA value by measuring the uplink time advance of the uplink channel (PUSCH/PUCCH/SRS/DMRS), and sends the TA value needing to be adjusted in advance or delayed to the terminal, so that the TA of the terminal is adjusted, the signal transmitted by the uplink channel of the terminal reaches the base station in the expected time alignment range, and the base station completes the receiving demodulation of the uplink channel.
The trigger condition for the adjustment of the base station TA needs to at least satisfy one of the following two conditions:
1) The TA value of the terminal measured by the base station through the uplink channel is offset by a certain threshold;
2) The base station does not issue a TA adjustment value in a configured TA adjustment timer (the value of the timer is issued to the terminal by RRC signaling in the terminal access phase), and in order to enable the terminal to keep uplink synchronization in the timer timeout period, TA adjustment instruction needs to be performed on the terminal.
Currently, the base station TA adjustment includes the following 3 steps:
1) The base station measures the TA value through an uplink channel (PUSCH/PUCCH/SRS/DMRS);
2) The base station calculates the measured TA value to obtain a TA adjustment quantity;
3) And the base station transmits the calculated TA adjustment quantity to the terminal through the PDSCH channel.
In step 3) of TA adjustment, the cell carrying TA information is a MAC CE (control cell of MAC) carried by the PDSCH channel. When the base station transmits PDSCH data of the corresponding terminal, it needs to consume a part of PDCCH resources to instruct demodulation of the PDSCH channel of the corresponding terminal. The terminal obtains the demodulation parameters of the PDSCH through blind decoding of the PDCCH, demodulates PDSCH data, and accordingly obtains the TA adjustment value sent by the base station through the MAC CE. It can be seen that, in the existing TA adjustment value transmission method, consumption of PDCCH and PDSCH is performed as long as TA needs to be issued, so that the spectrum utilization rate of the base station is low.
Disclosure of Invention
The present invention aims to provide a transmission method of TA in wireless communication, an electronic device and a storage medium, which can alleviate the above-mentioned problems.
In order to alleviate the problems, the technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides a method for transmitting a TA in wireless communication, when a base station prepares to issue a TA adjustment amount to a user terminal after finishing TA measurement and calculation, the method includes:
s1, judging whether pdsch data transmission exists between a base station and a user terminal currently, if so, jumping to a step S5, otherwise, continuing to execute the step S2;
s2, setting a TA issuing time window, wherein the TA issuing time window is calculated by taking the latest TA issuing time as the start, and the TA issuing time is smaller than the time length of a TA adjustment timer;
s3, judging whether pdsch data transmission exists between the base station and the user terminal currently in the TA issuing time window, if so, jumping to a step S5, otherwise, continuing to execute the step S4;
s4, the base station independently transmits TA adjustment amount to the user terminal;
and S5, the base station transmits the TA adjustment quantity to the user terminal along with the pdsch data.
The technical effect of the technical scheme is as follows: by setting the TA issuing time window and delaying the TA issuing mode, opportunities are created for the TA to send along with the pdsch data, and the pdcch resources are not required to be allocated to the TA data independently, so that the pdsch and the pdcch resources are saved, and the spectrum utilization rate of the base station is improved.
In a preferred embodiment of the present invention, the base station configures the TA to adjust the timer duration through RRC signaling during the access procedure of the ue.
The technical effect of the technical scheme is as follows: after receiving the TA adjustment timer, the terminal detects whether the TA is received within the time length of the TA adjustment timer, if not, the terminal is out of step, and the configuration of the TA adjustment timer controls the shortest TA issuing interval.
In a preferred embodiment of the present invention, the physical layer of the base station performs TA measurement through the pusch channel/pucch channel/srs channel and obtains the TA value.
The technical effect of the technical scheme is as follows: TA measurement may be performed by selecting an uplink channel, such as: the dmrs signal of the pusch channel is measured to estimate the TA value, or the pucch channel is measured to estimate the TA value, or the srs channel is measured to estimate the TA value.
In a preferred embodiment of the present invention, the physical layer of the base station reports the TA value obtained by TA measurement to the MAC layer for TA calculation, and obtains the TA adjustment.
The technical effect of the technical scheme is as follows: after the physical layer measures TA, the MAC carries out protocol processing and converts the protocol processing into a TA protocol value to obtain a TA adjustment quantity.
In a preferred embodiment of the present invention, the base station is provided with a TA threshold, and if the base station issues a TA adjustment to the ue, at least one of the following two conditions is satisfied:
1) The TA value obtained by TA measurement is deviated relative to a TA value threshold;
2) The base station does not issue TA adjustment amount to the user terminal within the configured TA adjustment timer time length, and the user terminal needs to keep uplink synchronization within the time-out time of the TA adjustment timer.
The technical effect of the technical scheme is as follows: for the first condition, the TA value is adjusted after meeting the adjustment threshold, so that the ping-pong of TA adjustment is avoided; for the second condition, if the TA is not issued in the TA adjustment timer, the TA adjustment needs to be issued once, so that the terminal is prevented from being out of step.
In a second aspect, the present invention provides an electronic device comprising:
at least one processor, and a memory communicatively coupled to the processor;
the memory stores instructions that are executed by the processor to cause the processor to implement the transmission method of the first aspect when executing the instructions.
In a third aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the transmission method of the first aspect.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of TA adjustment triggering in an embodiment;
fig. 2 is a flow chart of TA adjustment issue in the embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a method for transmitting TA in wireless communication, which specifically includes the following steps:
1. and successfully connecting the user terminal and the base station.
2. And the base station configures the TA to adjust the time length of the timer through RRC signaling in the process of accessing the user terminal.
3. The ue has data transmission on the uplink channel, such as data transmission on the pusch, or signal transmission on the pucch, or signal transmission on the srs channel.
4. The physical layer of the base station performs TA measurement through a pusch channel or a pucch channel or a srs channel and obtains a TA value.
5. And the physical layer of the base station reports the TA value obtained by TA measurement to the MAC layer for TA calculation, and the TA adjustment quantity is obtained.
6. Judging whether the TA adjustment quantity meets a TA adjustment threshold, wherein the TA adjustment threshold at least meets one of the following two conditions:
1) The TA value obtained by TA measurement is deviated relative to a TA value threshold;
2) The base station does not issue TA adjustment amount to the user terminal within the configured TA adjustment timer time length, and the user terminal needs to keep uplink synchronization within the time-out time of the TA adjustment timer.
7. Judging whether pdsch data transmission exists between the base station and the user terminal currently, if so, the base station transmits the TA adjustment quantity to the user terminal along with the pdsch data, otherwise, the subsequent steps are continuously executed.
8. Setting a TA issuing time window, wherein the TA issuing time window is calculated by taking the latest TA issuing time as the start, and the TA issuing time window is smaller than the time length of a TA adjusting timer.
9. Judging whether pdsch data transmission exists between the base station and the user terminal currently in the TA issuing time window, if so, the base station issues the TA adjustment quantity to the user terminal together with the pdsch data, otherwise, the base station independently issues the TA adjustment quantity to the user terminal.
In the conventional manner, consumption of PDCCH and PDSCH is performed only if there is a TA to be issued, but in this embodiment, by delaying issuing of the TA and by packaging the TA and issuing the PDSCH data together, PDCCH and PDSCH resources corresponding to one TA are reduced, and spectrum utilization of the base station is improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The transmission method of TA in wireless communication is characterized in that after TA measurement and calculation are completed, when the base station prepares to issue TA adjustment quantity to the user terminal, the following steps are carried out:
s1, judging whether pdsch data transmission exists between a base station and a user terminal currently, if so, jumping to a step S5, otherwise, continuing to execute the step S2;
s2, setting a TA issuing time window, wherein the TA issuing time window is calculated by taking the latest TA issuing time as the start, and the TA issuing time window is smaller than the time length of a TA adjusting timer;
s3, judging whether pdsch data transmission exists between the base station and the user terminal currently in the TA issuing time window, if so, jumping to a step S5, otherwise, continuing to execute the step S4;
s4, the base station independently transmits TA adjustment amount to the user terminal;
s5, the base station transmits the TA adjustment quantity to the user terminal along with the pdsch data;
the base station configures TA to adjust the time length of the timer through RRC signaling in the process of accessing the user terminal;
the physical layer of the base station performs TA measurement through a pusch channel/a pucch channel/a srs channel and obtains a TA value;
the physical layer of the base station reports the TA value obtained by TA measurement to the MAC layer for TA calculation and obtains the TA adjustment quantity;
the base station is provided with a TA value threshold, and if the base station needs to issue a TA adjustment amount to the user terminal, at least one of the following two conditions is satisfied:
1) The TA value obtained by TA measurement is deviated relative to a TA value threshold;
2) The base station does not issue the TA adjustment amount to the user terminal within the configured TA adjustment timer duration, and needs to enable the user terminal to keep uplink synchronization within the time-out time of the TA adjustment timer.
2. An electronic device, comprising:
at least one processor, and a memory communicatively coupled to the processor;
wherein the memory stores instructions that are executed by the processor to cause the processor to implement the transmission method of claim 1 when executing the instructions.
3. Computer readable storage medium, characterized in that it stores computer executable instructions for performing the transmission method according to claim 1.
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