CN108174444B - Positioning symbol transmission method, device and system based on distributed system - Google Patents

Abstract

The invention relates to a method, a device and a system for transmitting a positioning symbol based on a distributed system, wherein the method comprises the following steps: receiving configuration information sent by a baseband unit in a distributed system, wherein the configuration information comprises reporting period information and buffering time information of a positioning symbol and a transmission symbol used for returning the positioning symbol; caching the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information; and transmitting the positioning symbols buffered by each remote unit back to the baseband unit one by one through the transmission symbols. The positioning symbols of each remote unit can be separately transmitted by the symbol transmission mode, the transmission mode is simple, the return bandwidth is not required to be increased, and the cost is reduced. In addition, the baseband unit can detect the strength of the positioning symbol of each remote unit, and then positioning is performed according to the strength of each positioning symbol, so that the positioning result is more accurate.

Description

Positioning symbol transmission method, device and system based on distributed system

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a system for transmitting a positioning symbol based on a distributed system.

Background

At present, the positioning technology of the terminal in the mobile communication network is attracting more and more attention, and the applications based on the location service are developed vigorously and permeate into aspects of social life, such as navigation service, location push and correlation search, big data behaviors and the like.

The distributed system generally comprises a baseband unit and a remote unit, or comprises a base station unit, an extension unit and a remote unit, can be widely used for indoor and outdoor mobile communication network coverage, can realize common cell coverage among multiple remote units, and can realize no switching coverage in a large area. However, the distributed system usually uses the uplink measurement symbol for positioning, and when the uplink measurement symbol is used for positioning, the common cell positioning symbol needs to be transmitted to the base station unit first, the transmission scheme is that the symbols of the remote units under the common cell are combined and then transmitted back to the baseband for processing, and after the baseband receives the symbols, the respective symbols of the remote units cannot be identified, which causes the measurement granularity to be only at the cell level, which affects the positioning accuracy. In the terminal positioning technology of the currently common distributed coverage system, a front-end symbol separation feedback method is mainly adopted to separate respective symbols of each remote unit and then transmit the separated symbols to a base station unit for positioning or transmit positioning symbols by using an uplink idle TTI in a TDD system, however, the front-end symbol separation feedback method needs to increase feedback bandwidth, thereby increasing cost; the uplink idle TTI method has high complexity and poor applicability.

Disclosure of Invention

Therefore, it is necessary to provide a positioning symbol transmission method, apparatus and system based on a distributed system to solve the problem that the current front-end symbol separation backhaul method needs to increase backhaul bandwidth and thus cost.

In one aspect, an embodiment of the present application provides a method for transmitting a positioning symbol based on a distributed system, where the method includes the following steps:

receiving configuration information sent by a baseband unit in the distributed system, wherein the configuration information comprises reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

caching the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information;

and transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

In another aspect, an embodiment of the present application provides a method for transmitting a positioning symbol based on a distributed system, where the method includes the following steps:

sending configuration information to a cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

and receiving the positioning symbols cached by each remote unit sent by the cache unit, and extracting the positioning symbols cached by each remote unit one by one.

On the other hand, the embodiment of the present application further provides a positioning symbol transmission apparatus based on a distributed system, and the apparatus includes:

an information receiving module, configured to receive configuration information sent by a baseband unit in the distributed system, where the configuration information includes reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

a symbol caching module, configured to cache, in a reporting period, the positioning symbols of each remote unit under the common cell according to the reporting period information and the caching time information;

and the symbol transmission module is used for transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

The embodiment of the application provides a positioning symbol transmission device based on a distributed system, which comprises:

the information sending module is used for sending configuration information to the cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

a symbol receiving module, configured to receive the positioning symbol buffered by each remote unit sent by the buffer unit

And the symbol extraction module is used for extracting the positioning symbols cached by each remote unit one by one.

In addition, an embodiment of the present application further provides a positioning symbol transmission system based on a distributed system, including: a baseband unit and each remote unit; each remote unit is respectively connected with the baseband unit; or each remote unit is connected with the baseband unit in a cascade mode;

the baseband unit is configured to perform the following method steps:

sending configuration information to a cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

receiving the positioning symbols cached by each remote unit sent by the cache unit, and extracting the positioning symbols cached by each remote unit one by one;

each of the remote units is configured to perform the following method steps:

receiving configuration information sent by a baseband unit in the distributed system, wherein the configuration information comprises reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

caching the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information;

and transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

In addition, an embodiment of the present application further provides a positioning symbol transmission system based on a distributed system, including: a baseband unit, each extension unit and each remote unit; the extension units are cascaded and connected with the baseband unit through one of the extension units; and each remote unit is respectively connected with each expansion unit; or each remote unit is connected with each expansion unit in a cascade mode;

the baseband unit is configured to perform the following method steps:

sending configuration information to a cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

receiving the positioning symbols cached by each remote unit sent by the cache unit, and extracting the positioning symbols cached by each remote unit one by one;

each of the extension units is configured to perform the following method steps:

receiving configuration information sent by a baseband unit in the distributed system, wherein the configuration information comprises reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

caching the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information;

and transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

According to the positioning symbol transmission method, the device and the system based on the distributed system, the baseband unit sends the configuration information to the cache unit, the cache unit caches the positioning symbols of the remote units under the common cell according to the reporting period information and the cache time information of the positioning symbols in the configuration information, and transmits the positioning symbols cached by the remote units to the baseband unit one by one according to the transmission symbols of the returned positioning symbols in the configuration information, so that the separation transmission of the positioning symbols is realized, and the baseband unit extracts the received positioning symbols. The positioning symbols of each remote unit can be separately transmitted by the symbol transmission mode, the transmission mode is simple, the return bandwidth is not required to be increased, and the cost is reduced. In addition, the baseband unit can detect the strength of the positioning symbol of each remote unit, and then positioning is performed according to the strength of each positioning symbol, so that the positioning result is more accurate.

Drawings

FIG. 1 is a network topology diagram of a distributed system according to an embodiment of the present invention;

FIG. 2 is a network topology diagram of a distributed system according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a distributed system-based positioning symbol transmission method according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a distributed system-based positioning symbol transmission method according to an embodiment of the present invention;

fig. 5 is a schematic flow chart of a distributed system-based positioning symbol transmission method according to an embodiment of the present invention;

FIG. 6 is a timing diagram of one embodiment of a buffer unit transmitting a positioning symbol of each remote unit;

FIG. 7 is a timing diagram of one embodiment of a buffer unit transmitting a positioning symbol of each remote unit;

fig. 8 is a flow chart of a distributed system-based positioning symbol transmission method according to an embodiment of the present invention;

FIG. 9 is a timing diagram of one embodiment of a buffer unit transmitting a positioning symbol of each remote unit;

FIG. 10 is a timing diagram of one embodiment of a buffer unit transmitting a positioning symbol of each remote unit;

fig. 11 is a flow chart of a distributed system-based positioning symbol transmission method according to an embodiment of the present invention;

fig. 12 is a schematic flow chart of a distributed system-based positioning symbol transmission apparatus according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to preferred embodiments and the accompanying drawings. It is to be understood that the following examples are illustrative only and are not intended to limit the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that, for the convenience of description, only some but not all of the matters related to the present invention are shown in the drawings.

Fig. 1 is a network topology diagram of a distributed system in an embodiment of the present invention, where a baseband unit is disposed in a cell, and the baseband unit is connected to one or more remote units, where the connection manner may be that the remote units are directly connected to the baseband unit, or that the remote units are connected to the baseband unit in a cascade manner, fig. 1 shows that a remote unit 00, a remote unit 01, a remote unit 0K, a remote unit M0, and a remote unit M1, a remote unit M0 are connected to the baseband unit in a cascade manner, and a terminal or device to be positioned is in the cell, and a positioning symbol sent by the terminal or device to be positioned may be received by all the remote units, or may be received by some of the remote units, and the remote units send measured positioning symbols to the baseband unit, the base band unit determines the position information of the terminal to be positioned according to the received positioning symbols, or the base band unit sends a plurality of measurement results to a positioning calculation server, and the positioning calculation server determines the position information of the terminal to be positioned according to the positioning symbols of the terminal to be positioned. In the embodiment, the measurement of the terminal to be located shown in fig. 1 is performed by the remote unit, and in addition to the measurement of the terminal to be located performed by the remote unit, the measurement of the terminal to be located may be performed by the extension unit. Then, if the measurement work of the terminal to be located is performed by the extension unit, fig. 2 exemplarily shows another distributed system network topology provided by the embodiment of the present invention, as shown in fig. 2, which includes a baseband unit, a plurality of extension units, and a plurality of remote units, where extension unit 0, extension unit 1, extension unit N are cascaded and connected to the baseband unit through extension unit 0; each extension unit is cascaded with a plurality of remote units, as shown in fig. 2, a remote unit 000, a. Remote unit 100, a........ remote unit 10K, a.... remote unit 1M0, a.... remote unit 1MK is respectively cascaded with extension unit 1; .... rawing unit N00,. rawing unit N0K,. rawing unit NM0,. rawing unit NMK is cascaded with extension unit N, respectively.

Fig. 3 is a schematic flow chart of a positioning symbol transmission method based on a distributed system according to an embodiment of the present invention, and as shown in fig. 3, the embodiment of the present invention is explained in terms of a buffer unit, where the buffer unit may be each remote unit or each extension unit connected to each remote unit. The positioning symbol transmission method based on the distributed system in the embodiment of the invention comprises the following steps:

step S110, receiving configuration information sent by a baseband unit in the distributed system, where the configuration information includes reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol.

Specifically, the baseband unit sends configuration information to the buffer unit, where the configuration information includes reporting period information of the positioning symbol, buffering time information, and a transmission symbol of the returned positioning signal. The reporting period refers to the time required for collecting all the positioning symbols in each remote unit and transmitting the positioning symbols back to the baseband unit, and the reporting period information is a message, data and the like for recording the reporting period and is used for indicating each remote unit to transmit various information or signals back to the baseband unit. The transmission symbol refers to a symbol used for transmitting signals or information in a reporting period, wherein the transmission symbol may have transmission granularity of time slots, subframes, radio frames, and the like according to different systems. For example, in particular embodiments, the positioning symbols are transmitted using positioning transmission symbols or idle transmission symbols. The positioning transmission symbol refers to a symbol used for transmitting the positioning symbol, and the idle transmission symbol refers to a symbol which does not carry any signal and can be used for transmitting the positioning symbol or other types of signals. In addition, the positioning symbol may be plural, and for example, includes a positioning symbol 1 and a positioning symbol 2. The positioning symbol caching time information comprises the measurement time information of each positioning symbol and is mainly used for indicating the remote unit to cache each positioning symbol at the corresponding time.

And step S120, caching the positioning symbols of each remote unit under the common cell in the reporting period according to the reporting period information and the caching time information.

Specifically, each remote unit caches the positioning symbol of each remote unit under the common cell in the reporting period according to the reporting period information and the positioning symbol caching time information. One of the distributed systems can be regarded as a cell, and the remote units under the same cell are referred to as remote units in the same distributed system.

Step S130, the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols.

After buffering the positioning symbols of each remote unit, the buffering unit transmits the positioning symbols of each remote unit to the baseband unit one by one through the transmission symbols. The transmission symbols include positioning transmission symbols and/or idle transmission symbols, where the positioning transmission symbols are arranged alternately with the idle transmission symbols, and the idle transmission symbols are usually fixed or reserved transmission symbols and can be used for transmitting positioning symbols or other common data symbols. The positioning symbols can only be used to transmit positioning symbols. The buffer unit can transmit the positioning symbols to the baseband unit one by one through the positioning transmission symbols; the buffer unit can transmit each positioning symbol to the baseband unit one by one through a combination mode of the positioning transmission symbol and the idle transmission symbol or directly through the idle transmission symbol, wherein each positioning transmission symbol or the idle transmission symbol can only transmit one positioning symbol.

In addition, the positioning symbol may be one or more, and one buffer unit may buffer one or more positioning signals. The buffer unit may transmit each (i.e., all) positioning symbol buffered in each remote unit to the baseband unit one by one after buffering each positioning symbol (i.e., all) in each remote unit; or the buffer unit may buffer any of the positioning symbols in each remote unit, and then the buffer unit transmits any of the positioning symbols in each remote unit to the baseband unit one by one, and after the transmission is completed, the buffer unit buffers the next positioning symbol in each remote unit, and then transmits the positioning symbols, and so on until the transmission of each (i.e., all) positioning symbols in each remote unit is completed.

In the above method for transmitting positioning symbols based on the distributed system, the baseband unit sends the configuration information to the buffer unit, the buffer unit buffers the positioning symbols of each remote unit in the common cell according to the reporting period information and the buffering time information of the positioning symbols in the configuration information, and transmits the positioning symbols buffered by each remote unit to the baseband unit one by one according to the transmission symbols of the returned positioning symbols in the configuration information, thereby realizing the separate transmission of each positioning symbol, and the baseband unit extracts the received positioning symbols. The positioning symbols of each remote unit can be separately transmitted by the symbol transmission mode, the transmission mode is simple, the return bandwidth is not required to be increased, and the cost is reduced. In addition, the baseband unit can detect the strength of the positioning symbol of each remote unit, and then positioning is performed according to the strength of each positioning symbol, so that the positioning result is more accurate.

In one embodiment, the transmission symbols include positioning transmission symbols and/or idle transmission symbols.

Specifically, the positioning transmission symbol refers to a symbol used for transmitting the positioning symbol, and the idle transmission symbol refers to a symbol which does not carry any signal, and can be used for transmitting the positioning symbol or other types of signals. In this embodiment, any one of the positioning transmission symbol and the idle transmission symbol may be used to transmit the positioning symbol; the positioning symbol can also be transmitted by adopting a mode of combining the transmission symbol and the idle transmission symbol, so that the transmission rate of the positioning symbol is further improved.

In one embodiment, as shown in fig. 4, the step of returning the positioning symbols buffered by each remote unit to the baseband unit one by one through the transmission symbols includes:

step S132 is executed to close the positioning symbol of other remote units except any remote unit under the common cell when the positioning symbol buffered by any remote unit under the common cell is transmitted back to the baseband unit through the transmission symbol.

Specifically, the positioning symbol may be one or more, and the number of transmission symbols may be plural. Each transmission symbol is used for transmitting a positioning symbol cached by any one remote unit, namely, one transmission symbol is only used for transmitting one positioning symbol, when the transmission symbol is used for transmitting the positioning symbol cached by any one remote unit, the positioning symbols of other remote units are closed, namely, only one positioning symbol is ensured to be transmitted at each time, the interference of other positioning symbols on the positioning symbol being transmitted is avoided, and therefore the accuracy of each positioning symbol is ensured. The close is to clear the positioning symbol signals of other remote units except for any remote unit under the common cell.

In one embodiment, as shown in fig. 5, caching the positioning symbols of the remote units in the common cell in the reporting period according to the reporting period information and the buffering time information includes:

step S122, caching all positioning symbols of the common cell corresponding to each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information; in addition, the method for transmitting the positioning symbols buffered by each remote unit back to the baseband unit one by one through the transmission symbols comprises the following steps:

step S134, any positioning symbol cached by any remote unit under the common cell is transmitted back to the baseband unit through the transmission symbol;

step S136, after any positioning symbol buffered by any remote unit is returned to the baseband unit, starting to return the next positioning symbol buffered to the baseband unit until all positioning symbols buffered by each remote unit under the common cell are returned to the baseband unit.

Specifically, the positioning symbol includes at least one, and the number of transmission symbols may be plural. In the last cycle, all the positioning symbols of the common cell corresponding to each remote unit under the common cell may be buffered, after the buffering of the positioning symbols is completed, any one positioning symbol of any one remote unit may be transmitted back to the baseband unit by using a transmission symbol, and then the buffered next positioning symbol is transmitted back to the baseband unit until all the positioning signals of each remote unit are transmitted back. By adopting the uplink transmission mode, the positioning symbols of each remote unit can be transmitted separately, and the interference among the positioning symbols is reduced.

In one embodiment, the transmission symbols are positioning transmission symbols; the positioning symbol includes at least one, and may be a plurality of (positioning symbol 1, positioning symbol 2,.... positioning symbol N), and the number of positioning transmission symbols is a plurality (e.g., positioning transmission symbol 1, positioning transmission symbol 2,... positioning transmission symbol N), and each positioning transmission symbol is used to buffer the corresponding positioning symbol, e.g., positioning transmission symbol 1 to buffer positioning symbol 1, positioning transmission symbol 2 to buffer positioning symbol 2,... positioning transmission symbol N to buffer positioning symbol N. In addition, each positioning transmission symbol may be used to transmit any one of positioning transmission symbols, for example, positioning transmission symbol 1, positioning transmission symbol 2, and positioning transmission symbol N, any one of positioning transmission symbols may be used to transmit positioning symbol 1, positioning symbol 2, and positioning symbol 3. Each positioning transmission symbol is generally arranged alternately and is distributed periodically. For example, in a specific embodiment, in sampling time periods T0-T5, T0-T5 correspond to locate transmission symbol 1, normal data symbol, locate transmission symbol 2, normal data symbol, respectively; in sample time periods T6-T11, repeating as T0-T5, and so on, the other sample time periods correspond to T0-T5.

In this embodiment, the cache unit caches all the positioning symbols of each remote unit, wherein the same positioning symbol of each remote unit is cached at the same time. Specifically, each positioning symbol may be correspondingly buffered by using each positioning transmission symbol, that is, the buffer unit buffers the positioning symbol 1 of each remote unit by using the positioning transmission symbol 1, buffers the positioning symbol 2 of each remote unit by using the positioning transmission symbol 2, and then the buffer unit transmits each buffered positioning symbol to the baseband unit one by using each positioning transmission symbol after the buffer unit completes the corresponding buffering of each positioning symbol of each remote unit. Each positioning transmission symbol transmits a positioning symbol; and when any positioning transmission symbol is transmitted by using the positioning symbol, other positioning symbols are closed. That is, each positioning transmission symbol is guaranteed to transmit only one positioning symbol of one remote unit at a time, and mutual interference among the positioning symbols of other remote units is reduced, thereby causing symbol inaccuracy.

To facilitate understanding of the present solution, a detailed embodiment is given. As shown in fig. 1, the distributed system in this embodiment is composed of a baseband unit and remote units, and in this embodiment, the cache unit is each remote unit. In this embodiment, referring to fig. 6, if two positioning symbols (e.g., positioning symbol 1 and positioning symbol 2 in fig. 6) are needed to carry positioning needs of all users in the local common cell, and the two positioning symbols include three remote units, which are remote unit 1, remote unit 2 and remote unit 3, respectively, the baseband unit configures the three remote units to perform backhaul (i.e., transmit) on the positioning symbols from time T0, the three remote units buffer the positioning symbols 1 buffered by the respective remote units at time T0 (i.e., positioning transmission symbol 1), and the three remote units buffer the positioning symbols 2 buffered by the respective remote units at time T3 (i.e., positioning transmission symbol 2); then, the positioning symbol 1 buffered by the remote unit 1 at time T0 is returned at time T6 (the positioning symbols of the remote units 2 and 3 are turned off at time T6), the positioning symbol 1 buffered by the remote unit 2 at time T0 is returned at time T9 (the positioning symbols of the remote units 1 and 3 are turned off at time T9), the positioning symbol 1 buffered by the remote unit 3 at time T0 is returned at time T12 (the positioning symbols of the remote units 1 and 2 are turned off at time T12), and at this time, the return of the positioning symbol 1 is completed. Since the cell has two positioning symbols, after returning the positioning symbol 1, the cell needs to enter the returning of the positioning symbol 2, and the positioning symbols 2 of the three remote units are completed in the manner of returning the positioning symbol 1. By adopting the uplink transmission mode, the positioning symbols of each remote unit can be transmitted separately, so that the interference among the positioning symbols is reduced, and the positioning according to the positioning symbol of each remote unit is more accurate.

It should be understood that the transmission manner of the positioning symbols of each remote unit is to transmit back one by one (i.e. to the baseband unit) according to the buffered sequence, and other manners may also be adopted as long as it is ensured that each positioning symbol of each remote unit is transmitted independently, i.e. does not interfere with other positioning symbols.

In one embodiment, the transmission symbols adopt a positioning transmission symbol and an idle transmission symbol, and the number of the positioning transmission symbols and the number of the gap transmission symbols are multiple. The positioning symbol may be one or multiple (e.g., positioning symbol 1, positioning symbol 2,. and positioning symbol N), and each positioning transmission symbol is used to buffer the corresponding positioning symbol. In addition, each positioning transmission symbol may be used to transmit any positioning symbol. Each positioning transmission symbol and idle transmission symbol is typically arranged alternately and periodically. For example, in a particular embodiment, in sampling time periods T0-T5, T0-T5 correspond to locate transmission symbol 1, normal data symbol, locate transmission symbol 2, idle transmission symbol, normal data symbol, respectively; in sample time periods T6-T11, repeating as T0-T5, and so on, the other sample time periods correspond to T0-T5.

In this embodiment, the cache unit caches each positioning symbol of each remote unit, wherein the same positioning symbol of each remote unit is cached at the same time. Specifically, the buffer unit may buffer the positioning symbol 1 of each remote unit by using the positioning transmission symbol 1, buffer the positioning symbol 2 of each remote unit by using the positioning transmission symbol 2, buffer the positioning symbol N of each remote unit by using the positioning transmission symbol N, and after the buffer unit completes the buffer of each positioning symbol of each remote unit correspondingly, the buffer unit may transmit each buffered positioning symbol to the baseband unit one by using each positioning transmission symbol and the idle transmission symbol. Each positioning transmission symbol transmits a positioning symbol; and when any positioning symbol is transmitted by using the positioning transmission symbol or the idle transmission symbol, other positioning symbols are closed. That is, each positioning transmission symbol or idle transmission symbol is guaranteed to transmit only one positioning symbol of one remote unit at a time, and mutual interference between the positioning symbols of other remote units is reduced, thereby causing symbol inaccuracy.

To facilitate understanding of the present solution, a detailed embodiment is given. As shown in fig. 1, the distributed system in this embodiment is composed of a baseband unit and remote units, and in this embodiment, the cache unit is each remote unit. In this embodiment, referring to fig. 7, if two positioning symbols (e.g., positioning symbol 1 and positioning symbol 2 in fig. 7) are needed to carry positioning needs of all users in the local common cell, and the two positioning symbols include three remote units, which are remote unit 1, remote unit 2 and remote unit 3, respectively, the baseband unit configures the three remote units to perform backhaul (i.e., transmit) on the positioning symbols from time T0, the three remote units buffer the positioning symbols 1 buffered by the respective remote units at time T0 (i.e., positioning transmission symbol 1), and the three remote units buffer the positioning symbols 2 buffered by the respective remote units at time T3 (i.e., positioning transmission symbol 2); then, the positioning symbol 1 buffered by the remote unit 1 at time T0 is returned at time T4 (the positioning symbols of the remote units 2 and 3 are turned off at time T4), the positioning symbol 1 buffered by the remote unit 2 at time T0 is returned at time T6 (the positioning symbols of the remote units 1 and 3 are turned off at time T6), the positioning symbol 1 buffered by the remote unit 3 at time T0 is returned at time T9 (the positioning symbols of the remote units 1 and 2 are turned off at time T9), and at this time, the return of the positioning symbol 1 is completed. Since the cell has two positioning symbols, after returning the positioning symbol 1, the cell needs to enter the returning of the positioning symbol 2, and the positioning symbols 2 of the three remote units are completed in the manner of returning the positioning symbol 1. By adopting the uplink transmission mode, the positioning symbols of each remote unit can be transmitted separately, so that the interference among the positioning symbols is reduced, and the positioning according to the positioning symbol of each remote unit is more accurate. In addition, when the positioning symbols of each remote unit are transmitted, the back transmission bandwidth does not need to be increased, and the cost is reduced. In addition, the idle time is increased when the positioning symbol based on the distributed system is transmitted, so the transmission opportunity is increased and the transmission time is shortened.

It should be understood that the transmission manner of the positioning symbols of each remote unit is to transmit back one by one (i.e. to the baseband unit) according to the buffered sequence, and other manners may also be adopted as long as it is ensured that each positioning symbol of each remote unit is transmitted independently, i.e. does not interfere with other positioning symbols.

In addition, the above only shows two specific transmission modes, that is, the transmission symbol is a positioning transmission symbol, and the transmission symbol is a positioning transmission symbol and an idle transmission symbol, and the positioning symbol may be transmitted by using only the idle transmission symbol.

In one embodiment, as shown in fig. 8, caching the positioning symbols of the remote units in the common cell in the reporting period according to the reporting period information and the buffering time information includes:

step S124, according to the reporting period information and the caching time information, caching any positioning symbol corresponding to each remote unit in a reporting period corresponding to any positioning symbol of the common cell; in addition, the method for transmitting the positioning symbols buffered by each remote unit back to the baseband unit one by one through the transmission symbols comprises the following steps:

step S138, any positioning symbol cached by each remote unit is transmitted back to the baseband unit one by one through the transmission symbol; wherein, after transmitting any positioning symbol buffered by each remote unit back to the baseband unit one by one through the transmission symbol, the method further comprises:

step S140, according to the reporting period information and the buffering time information, buffering the next symbol corresponding to each remote unit in the reporting period corresponding to the next positioning symbol of any positioning symbol, and returning the next symbol buffered by each remote unit to the baseband unit one by one through the transmission symbol until all the positioning symbols of each remote unit are returned to the baseband unit.

Specifically, the positioning symbol includes at least one, and the number of transmission symbols may be plural. In the last cycle, any positioning symbol corresponding to each remote unit may be cached in a reporting cycle corresponding to any positioning symbol of the common cell according to the reporting cycle information and the buffering time information, after the positioning symbol caching is completed, transmission symbols may be used to transmit back any positioning symbol corresponding to each remote unit to the baseband unit one by one, then a next symbol corresponding to each remote unit may be cached in a reporting cycle corresponding to a next positioning symbol of any positioning symbol according to the reporting cycle information and the buffering time information, then a next positioning symbol of each remote unit is transmitted, and so on until all positioning symbols of each remote unit are completely transmitted back. By adopting the uplink transmission mode, the positioning symbols of each remote unit can be transmitted separately, and the interference among the positioning symbols is reduced.

In one embodiment, the transmission symbols are positioning transmission symbols; the number of the positioning transmission symbols is multiple, and the positioning symbol may be one or multiple (for example, positioning symbol 1, positioning symbol 2,. or positioning symbol N), and each positioning transmission symbol is used to buffer the corresponding positioning symbol. In addition, each positioning transmission symbol may be used to transmit any positioning symbol. Each positioning symbol is usually arranged alternately and distributed periodically. For example, in a particular embodiment, in sampling time periods T0-T5, T0-T5 correspond to locate transmission symbol 1, normal data symbol, normal symbol, locate transmission symbol 2, normal data symbol, respectively; in sample time periods T6-T11, repeating as T0-T5, and so on, the other sample time periods correspond to T0-T5.

In this embodiment, the cache unit caches the positioning symbol 1 of each remote unit at the same time, that is, the positioning symbol 1 of each remote unit can be cached by using the positioning transmission symbol 1, and after the caching of the positioning symbol 1 of each remote unit is completed, the positioning symbols 1 of each remote unit are transmitted to the baseband unit one by using each positioning transmission symbol after the positioning transmission symbol 1; after the positioning symbol 1 of each remote unit is transmitted, the positioning symbol 2 of each remote unit is cached at the same time, that is, the positioning symbol 2 of each remote unit can be cached by using the positioning transmission symbol 2, and after the caching of the positioning symbol 2 of each remote unit is completed, the positioning symbols 2 of each remote unit are transmitted to the baseband unit one by using the positioning symbols after the positioning transmission symbol 2; and the same analogy is carried out until all the positioning symbols of all the remote units are transmitted to the baseband unit. Each positioning symbol transmits a positioning symbol; and when any positioning symbol is transmitted by using the positioning symbol, other positioning symbols are closed. That is, each positioning symbol is guaranteed to transmit only one positioning symbol of one remote unit at a time, and mutual interference among the positioning symbols of other remote units is reduced, thereby causing symbol inaccuracy. In addition, when the positioning symbols of each remote unit are transmitted, the back transmission bandwidth does not need to be increased, and the cost is reduced.

To facilitate understanding of the present solution, a detailed embodiment is given. As shown in fig. 1, the distributed system in this embodiment is composed of a baseband unit and remote units, and in this embodiment, the cache unit is each remote unit. In this embodiment, referring to fig. 9, if two positioning symbols (corresponding to positioning symbol 1 and positioning symbol 2 in fig. 9) are needed to carry the positioning needs of all users in the local common cell, and the total of three remote units, namely, remote unit 1, remote unit 2, and remote unit 3, are included, the baseband unit configures the three remote units to perform backhaul on the positioning symbols from time T0 (i.e., transmit to the baseband unit) by using positioning transmission symbols, buffer the positioning symbols 1 received by the respective remote units at the time T0, and then the positioning symbols 1 buffered by the remote unit 1 at time T0 are looped back at time T3 (positioning symbols 1 of remote units 2 and 3 are closed at time T3), and the positioning symbols 1 buffered by the remote unit 2 at time T0 are looped back at time T6 (positioning symbols 1 of remote units 1 and 3 are closed at time T6), the remote unit 3 transmits back the anchor symbol 1 buffered at time T0 at time T9 (anchor symbol 1 of remote units 1 and 2 is turned off at time T9), and at this time, the transmission of the anchor symbol 1 is completed. Since there are two positioning symbols in the cell, after returning positioning symbol 1, it needs to enter the returning of positioning symbol 2, so that the three remote units buffer positioning symbol 2 at the moment when the nearest positioning symbol 2 arrives, i.e. T15, and then separate returning of the three remote units with respect to the buffered positioning symbol at time T15 is completed in the manner of returning positioning symbol 1.

In one embodiment, the transmission symbols adopt a positioning transmission symbol and an idle transmission symbol, and the number of the positioning transmission symbols and the number of the gap transmission symbols are multiple. The positioning symbol may be one or multiple (e.g., positioning symbol 1, positioning symbol 2,. and positioning symbol N), and each positioning transmission symbol may be used to buffer the corresponding positioning symbol. In addition, each positioning transmission symbol may be used to transmit any positioning symbol. Each positioning transmission symbol and idle transmission symbol is typically arranged alternately and periodically. For example, in a particular embodiment, in sampling time periods T0-T5, T0-T5 correspond to locate transmission symbol 1, normal data symbol, locate transmission symbol 2, idle transmission symbol, normal data symbol, respectively; in sample time periods T6-T11, repeating as T0-T5, and so on, the other sample time periods correspond to T0-T5.

In this embodiment, the buffer unit buffers the positioning symbol 1 of each remote unit at the same time, that is, the positioning symbol 1 of each remote unit can be buffered by using the positioning transmission symbol 1, and after the buffering of the positioning symbol 1 of each remote unit is completed, the positioning symbols 1 of each remote unit are transmitted to the baseband unit one by using each positioning transmission symbol and each idle transmission symbol after the positioning transmission symbol 1; after the positioning symbol 1 of each remote unit is transmitted, the positioning symbol 2 of each remote unit is firstly cached at the same time, namely the positioning symbol 2 of each remote unit is cached by using the positioning transmission symbol 2, and after the caching of the positioning symbol 2 of each remote unit is completed, the positioning symbols 2 of each remote unit are transmitted to the baseband unit one by using each positioning transmission symbol and each idle transmission after the positioning transmission symbol 2; and the same analogy is carried out until all the positioning symbols of all the remote units are transmitted to the baseband unit. Each positioning transmission symbol or idle transmission symbol only transmits one positioning symbol; and when any positioning symbol is transmitted by using a positioning transmission symbol or an idle transmission symbol, closing other positioning symbols and the common data symbol in an uploading period. That is, each positioning transmission symbol or idle transmission symbol is guaranteed to transmit only one positioning symbol of one remote unit at a time, and mutual interference between the positioning symbols of other remote units is reduced, thereby causing symbol inaccuracy. In addition, when the positioning symbols of each remote unit are transmitted, the back transmission bandwidth does not need to be increased, and the cost is reduced. In addition, the idle time is increased when the positioning symbol based on the distributed system is transmitted, so the transmission opportunity is increased and the transmission time is shortened.

To facilitate understanding of the present solution, a detailed embodiment is given. As shown in fig. 1, the distributed system in this embodiment is composed of a baseband unit and remote units, and in this embodiment, the cache unit is each remote unit. In this embodiment, referring to fig. 10, if two positioning symbols (corresponding to positioning symbol 1 and positioning symbol 2 in fig. 10) are needed to carry the positioning needs of all users in the local common cell, and the total of three remote units, namely, remote unit 1, remote unit 2, and remote unit 3, are included, the baseband unit configures the three remote units to perform backhaul on the positioning symbol (i.e., transmit to the baseband unit) by using the positioning transmission symbol and the idle transmission symbol from time T0, and buffer the positioning symbol 1 received by each remote unit at time T0, and then the positioning symbol 1 buffered by the remote unit 1 at time T0 is looped back at time T3 (positioning symbol 1 of remote units 2 and 3 is turned off at time T3), and the positioning symbol 1 buffered by the remote unit 2 at time T0 is looped back at time T4 (positioning symbol 1 of remote units 1 and 3 is turned off at time T4), the remote unit 3 transmits back the anchor symbol 1 buffered at time T0 at time T6 (anchor symbol 1 of remote units 1 and 2 is turned off at time T6), and at this time, the transmission of the anchor symbol 1 is completed. Since there are two positioning symbols in the cell, after returning positioning symbol 1, it needs to enter the returning of positioning symbol 2, so that the three remote units buffer positioning symbol 2 at the moment when the nearest positioning symbol 2 arrives, i.e. T9, and then separate returning of the three remote units with respect to the buffered positioning symbol at time T9 is completed in the manner of returning positioning symbol 1.

In one embodiment, caching positioning symbols of each remote unit under a common cell in a reporting period according to reporting period information and buffering time information includes: and caching the positioning symbols of the remote units under the common cell in the same reporting period according to the reporting period information and the caching time information.

Specifically, the reporting period appears periodically, and each positioning symbol also appears periodically according to the reporting period; in this embodiment, the positioning symbols of each remote unit in the common cell are cached in the same reporting period according to the reporting period information and the caching time information, so that it can be ensured that all the positioning symbols are quickly transmitted back to the baseband unit, and thus positioning is quickly completed according to the positioning symbols.

In one embodiment, the cache unit is a remote unit; or the cache unit is each extension unit connected with each remote unit; when the cache unit is each remote unit, each remote unit caches the positioning symbol of the remote unit; when the buffer unit is each extension unit, each extension unit buffers the positioning symbols of all the remote units connected to the extension unit.

In this embodiment, the cache unit may be each remote unit or each expansion unit connected to each remote unit. When the cache unit is each remote unit, each remote unit caches the positioning symbol of the remote unit, and then each remote unit transmits the positioning symbol of the remote unit to the baseband unit one by one; when the buffer unit is each extension unit connected with each remote unit, each extension unit buffers the positioning symbols of all remote units connected under the extension unit, and then each extension unit transmits the buffered positioning symbols of each remote unit to the baseband unit one by one.

Fig. 11 is a flowchart illustrating a positioning symbol transmission method based on a distributed system according to an embodiment of the present invention, and as shown in fig. 11, the embodiment of the present invention is described from the perspective of a baseband unit. The positioning symbol transmission method based on the distributed system in the embodiment of the invention comprises the following steps:

step S1110, sending configuration information to the cache unit, where the configuration information includes reporting period information, preset transmission symbols, and positioning symbol cache time information; the buffer unit is each remote unit in the distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for indicating the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

step S1120, the positioning symbols buffered by each remote unit sent by the buffer unit are received, and the positioning symbols buffered by each remote unit are extracted one by one.

Specifically, the baseband unit sends the configuration information to the buffer unit. The cache unit caches the positioning symbols of each remote unit according to the configuration information, and sends the positioning symbols to the baseband unit one by one. The baseband unit receives the positioning symbols one by one according to the transmission mode of the positioning symbols of the buffer unit and extracts the positioning symbols.

In the above method for transmitting positioning symbols based on the distributed system, the baseband unit sends the configuration information to the buffer unit, the buffer unit buffers the positioning symbols of each remote unit in the common cell according to the reporting period information and the buffering time information of the positioning symbols in the configuration information, and transmits the positioning symbols buffered by each remote unit to the baseband unit one by one according to the transmission symbols of the returned positioning symbols in the configuration information, thereby realizing the separate transmission of each positioning symbol, and the baseband unit extracts the received positioning symbols. The positioning symbols of each remote unit can be separately transmitted by the symbol transmission mode, the transmission mode is simple, the return bandwidth is not required to be increased, and the cost is reduced.

In one embodiment, after the step of extracting the positioning symbols one by the baseband unit, the method further includes:

the base band unit combines all the positioning symbols to obtain the positioning symbols of the common cell; the base band unit calculates the measured value of the positioning symbol of the common cell, and the measured value is used for positioning the equipment to be positioned.

Specifically, the baseband unit receives and extracts the positioning symbols of each remote unit, and further includes calculating the measurement value of each remote unit positioning symbol at the same time, positioning the device to be positioned according to the measurement value or reporting the measurement value to the positioning operation module, and outputting the position result of the device to be positioned by the positioning operation module. In addition, the measured value is determined by a positioning algorithm, such as a TDOA positioning algorithm, and then the measured value is a time advance; the power fingerprint method, the measured value is that the symbol receiving is strong; if the measured value is AOA, the measured value is an angle; if AOA + TA, the measurement is angle plus time advance.

In addition, after receiving the positioning symbols of each remote unit and extracting each positioning symbol, the baseband unit may combine each positioning symbol buffered, separated and returned at the same time to obtain a positioning symbol synthesized by the common cell.

According to the above-mentioned method for transmitting a positioning symbol based on a distributed system of the present invention, the present invention further provides a device for transmitting a positioning symbol based on a distributed system, and the following describes the device for transmitting a positioning symbol based on a distributed system in detail with reference to the accompanying drawings and preferred embodiments.

Fig. 12 is a schematic structural diagram of a distributed system-based positioning symbol transmission apparatus according to an embodiment of the present invention. As shown in fig. 12, the present embodiment is described from the cache unit side. The positioning symbol transmission apparatus based on the distributed system in this embodiment includes:

an information sending module 10, configured to send configuration information to the cache unit, where the configuration information includes reporting period information, preset transmission symbols, and positioning symbol cache time information; the buffer unit is each remote unit in the distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for indicating the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols; a symbol receiving module 20, a positioning symbol extracting module 30 for receiving the remote units cache sent by the cache unit, and configured to extract the positioning symbols cached by the remote units one by one.

In one embodiment, the transmission symbols include positioning transmission symbols and/or idle transmission symbols.

In one embodiment, the symbol transmission module 30 is further configured to close the positioning symbols of other remote units outside any remote unit under the common cell when the buffered positioning symbols of any remote unit under the common cell are transmitted back to the baseband unit through the transmission symbols.

In one embodiment, the symbol caching module 30 is further configured to cache all positioning symbols of a common cell corresponding to each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information; the symbol transmission module 30 is further configured to transmit any positioning symbol buffered by any remote unit under the common cell back to the baseband unit through the transmission symbol, and after transmitting any positioning symbol buffered by any remote unit back to the baseband unit, start to transmit the next buffered positioning symbol back to the baseband unit until all positioning symbols buffered by each remote unit under the common cell are transmitted back to the baseband unit.

In one embodiment, the symbol caching module 20 is further configured to cache any one positioning symbol corresponding to each remote unit in a reporting period corresponding to any one positioning symbol of the common cell according to the reporting period information and the caching time information; the symbol transmission module 30 is used for transmitting any positioning symbol cached by each remote unit back to the baseband unit one by one through transmission symbols;

the symbol caching module 20 is further configured to cache, according to the reporting period information and the caching time information, a next symbol corresponding to each remote unit in a reporting period corresponding to a next positioning symbol of any positioning symbol; the symbol transmission module 30 is further configured to transmit the next symbol buffered by each remote unit back to the baseband unit one by one through the transmission symbol until all the positioning symbols of each remote unit are transmitted back to the baseband unit.

In one embodiment, the symbol caching module 20 is further configured to cache the positioning symbols of the remote units in the common cell in the same reporting period according to the reporting period information and the caching time information.

According to the above-mentioned method for transmitting a positioning symbol based on a distributed system of the present invention, the present invention further provides a device for transmitting a positioning symbol based on a distributed system, and the following describes the device for transmitting a positioning symbol based on a distributed system in detail with reference to the accompanying drawings and preferred embodiments.

Fig. 12 is a schematic structural diagram of a distributed system-based positioning symbol transmission apparatus according to an embodiment of the present invention. As shown in fig. 12, the present embodiment is described from the baseband unit side; the positioning symbol transmission apparatus based on the distributed system in this embodiment includes:

an information sending module 40, configured to send configuration information to the cache unit, where the configuration information includes reporting period information, preset transmission symbols, and positioning symbol cache time information; the buffer unit is each remote unit in the distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for indicating the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

a symbol receiving module 50, configured to receive the positioning symbol cached by each remote unit sent by the cache unit; a symbol extracting module 60, configured to extract the positioning symbols buffered in each remote unit one by one.

In one embodiment, the method further comprises the following steps:

the symbol merging module is used for merging all the positioning symbols to obtain the positioning symbols of the common cell;

and the measurement value calculation module is used for calculating the measurement value of the positioning symbol of the common cell, and the measurement value is used for positioning the equipment to be positioned.

The positioning symbol transmission device based on the distributed system can execute the positioning symbol transmission method based on the distributed system provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. As for the processing methods executed by the functional modules, for example, the information receiving module 10, the symbol transmitting module 20, the symbol extracting module 60, and the like, reference may be made to the description in the foregoing method embodiments, and no further description is given here.

According to the above-mentioned method and apparatus for transmitting a positioning symbol based on a distributed system of the present invention, the present invention further provides a system for transmitting a positioning symbol based on a distributed system, and the following describes the system for transmitting a positioning symbol based on a distributed system in detail with reference to the accompanying drawings and preferred embodiments.

A positioning symbol transmission system based on a distributed system, comprising: a baseband unit and each remote unit; each remote unit is respectively connected with the baseband unit; or each remote unit is connected with the baseband unit in a cascade mode; the baseband unit is used for executing the positioning symbol transmission method based on the distributed system (the method described from the perspective of the baseband unit); each remote unit is configured to execute the claimed positioning symbol transmission method based on the distributed system (method described from the buffer unit perspective side). Wherein the distributed system may refer to fig. 1.

A positioning symbol transmission system based on a distributed system, comprising: a baseband unit, each extension unit and each remote unit; the extension units are cascaded and connected with the baseband unit through one of the extension units; and each remote unit is respectively connected with each expansion unit; or each remote unit is connected with each expansion unit in a cascade mode; the baseband unit is used for executing the positioning symbol transmission method based on the distributed system (the method described from the perspective of the baseband unit); each buffer unit is configured to execute the claimed positioning symbol transmission method based on the distributed system (method described from the buffer unit perspective side). Wherein the distributed system can refer to fig. 2.

The positioning symbol transmission system based on the distributed system has the same beneficial effects as the positioning symbol transmission method based on the distributed system.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. A method for transmitting a positioning symbol based on a distributed system is characterized by comprising the following steps:

receiving configuration information sent by a baseband unit in the distributed system, wherein the configuration information comprises reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

caching the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information;

and transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

2. The distributed system-based positioning symbol transmission method according to claim 1, wherein the transmission symbol comprises a positioning transmission symbol and/or an idle transmission symbol.

3. The method according to claim 1 or 2, wherein the transmitting the positioning symbols buffered by each remote unit back to the baseband unit one by one through the transmission symbols comprises:

and when the positioning symbol cached by any remote unit under the common cell is transmitted back to the baseband unit through the transmission symbol, closing the positioning symbols of other remote units except the remote unit under the common cell.

4. The method according to claim 1 or 2, wherein the buffering the positioning symbols of the remote units in the common cell in the reporting period according to the reporting period information and the buffering time information comprises:

caching all positioning symbols of a common cell corresponding to each remote unit under the common cell in a reporting period according to the reporting period information and the caching time information;

the transmitting symbols are used for transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one, and the method comprises the following steps:

transmitting any positioning symbol cached by any remote unit under the common cell back to the baseband unit through the transmission symbol;

after any positioning symbol cached by any remote unit is transmitted back to the baseband unit, the next cached positioning symbol is transmitted back to the baseband unit until all positioning symbols cached by each remote unit under the common cell are transmitted back to the baseband unit.

5. The method according to claim 1 or 2, wherein the buffering the positioning symbols of the remote units in the common cell in the reporting period according to the reporting period information and the buffering time information comprises:

caching any one positioning symbol corresponding to each remote unit in a reporting period corresponding to any one positioning symbol of a common cell according to the reporting period information and the caching time information;

the transmitting symbols are used for transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one, and the method comprises the following steps:

transmitting any positioning symbol cached by each remote unit back to the baseband unit one by one through the transmission symbol;

after the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols, the method further includes:

and caching the next positioning symbol corresponding to each remote unit in a reporting period corresponding to the next positioning symbol of any positioning symbol according to the reporting period information and the caching time information, and returning the next positioning symbol cached by each remote unit to the baseband unit one by one through the transmission symbol until all the positioning symbols of each remote unit are returned to the baseband unit.

6. The method according to claim 1 or 2, wherein the buffering the positioning symbols of the remote units in the common cell in the reporting period according to the reporting period information and the buffering time information comprises:

and caching the positioning symbols of the remote units under the common cell in the same reporting period according to the reporting period information and the caching time information.

7. A positioning symbol transmission method based on a distributed system is characterized by comprising the following steps:

sending configuration information to a cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

and receiving the positioning symbols cached by each remote unit sent by the cache unit, and extracting the positioning symbols cached by each remote unit one by one.

8. A positioning symbol transmission apparatus based on a distributed system, comprising:

an information receiving module, configured to receive configuration information sent by a baseband unit in the distributed system, where the configuration information includes reporting period information and buffering time information of a positioning symbol, and a transmission symbol used for returning the positioning symbol;

a symbol caching module, configured to cache, in a reporting period, the positioning symbols of each remote unit under the common cell according to the reporting period information and the caching time information;

and the symbol transmission module is used for transmitting the positioning symbols cached by each remote unit back to the baseband unit one by one through the transmission symbols.

9. A positioning symbol transmission apparatus based on a distributed system, comprising:

the information sending module is used for sending configuration information to the cache unit, wherein the configuration information comprises reporting period information, preset transmission symbols and positioning symbol cache time information; the buffer unit is each remote unit in a distributed system or each extension unit connected with each remote unit in the distributed system, the configuration information is used for instructing the buffer unit to buffer the positioning symbols of each remote unit under the common cell in a reporting period according to the reporting period information and the buffer time information, and the positioning symbols buffered by each remote unit are transmitted back to the baseband unit one by one through the transmission symbols;

a symbol receiving module, configured to receive the positioning symbol buffered by each remote unit sent by the buffer unit

And the symbol extraction module is used for extracting the positioning symbols cached by each remote unit one by one.

10. A positioning symbol transmission system based on a distributed system, comprising: a baseband unit and each remote unit; each remote unit is respectively connected with the baseband unit; or each remote unit is connected with the baseband unit in a cascade mode;

the baseband unit is used for executing the positioning symbol transmission method based on the distributed system of claim 7;

each remote unit is configured to perform the method for transmitting positioning symbols based on the distributed system according to any one of claims 1 to 6.

11. A positioning symbol transmission system based on a distributed system, comprising: a baseband unit, each extension unit and each remote unit; the extension units are cascaded and connected with the baseband unit through one of the extension units; and each remote unit is respectively connected with each expansion unit; or each remote unit is connected with each expansion unit in a cascade mode;

the baseband unit is used for executing the positioning symbol transmission method based on the distributed system of claim 7;

each of the extension units is configured to perform the method for transmitting positioning symbols based on the distributed system according to any one of claims 1 to 6.

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