CN112867133B - Method for acquiring time delay adjustment amount and distributed base station - Google Patents

Abstract

The disclosure relates to the technical field of communication, and provides a method for obtaining a delay adjustment amount and a distributed base station. Each reference baseband unit determines time delay adjustment data of the reference baseband unit according to time delay adjustment data of a next-stage reference baseband unit and time delay of the next-stage reference baseband unit, a target baseband unit, closest to a forward transmission system module, of a baseband module acquires time delay adjustment quantity of the reference baseband units of all systems in the target baseband unit, the target baseband unit sends the time delay adjustment data of the target baseband unit to the forward transmission system module, and the forward transmission system module determines time delay adjustment data of non-baseband units in the forward transmission system according to the time delay adjustment data of the target baseband unit. Therefore, the acquisition efficiency of the time delay adjustment amount is improved.

Description

Acquisition method of delay adjustment amount and distributed base station

technical field

The present disclosure relates to the technical field of communications, and in particular to a method for acquiring a delay adjustment amount and a distributed base station.

Background technique

With the continuous development of mobile communications, in order to meet the operational needs of operators, base stations need to support multiple standards, and in order to increase the capacity of base station coverage areas, base stations need to support multiple carriers at the same time.

In order to meet the coverage requirements of various complex scenarios, distributed base stations appear. Distributed base stations generally include three types of network elements, baseband units, radio remote units, and extension units. Since the base station must support both multiple standards and multiple carriers, there are many network elements in the distributed base station, and the network elements are connected through optical fibers. In order to ensure the performance of the uplink transmission and downlink transmission of the base station, it is necessary to ensure that the downlink data sent by the distributed base station is aligned at the air interface time and the uplink data received by the distributed base station is aligned at the air interface time. In the prior art, the fiber delay measurement values between all network elements need to be sent to the baseband unit, and the inherent delays inside all network elements must also be sent to the baseband unit, and then calculated by the baseband unit to obtain each non-baseband unit The delay adjustment amount of each non-baseband unit is sent to each non-baseband unit, and each non-baseband unit caches the data according to the delay adjustment amount when sending data or receiving data, realizing distributed The downlink data sent by the base station is aligned at the air interface time and the uplink data received is aligned at the air interface time.

Using the method in the prior art, the efficiency of obtaining the delay adjustment amount of each network element in the distributed base station is not high. Moreover, in the process of obtaining the delay adjustment amount, each network element is closely related, which is a tightly coupled relationship, which is not conducive to the operator's expansion and addition of network elements on the operating base station according to the business expansion needs.

Contents of the invention

In order to solve the above technical problem, the present disclosure provides a method for acquiring a delay adjustment amount and a distributed base station, which improves the efficiency of acquiring the delay adjustment amount.

The first aspect of the present disclosure provides a method for obtaining a delay adjustment amount, which is applied to a distributed base station, where the distributed base station includes a baseband module and a fronthaul system module, and the baseband module includes baseband unit groups corresponding to multiple standards; Each baseband unit group contains a plurality of baseband units, and the plurality of baseband units are sequentially cascaded through optical fibers, and the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and a plurality of the reference basebands The units are sequentially cascaded through optical fibers; the target baseband unit is connected to the fronthaul system module through optical fibers, and the target baseband unit is the baseband unit closest to the fronthaul system module;

The methods include:

In the same baseband unit group, for each baseband unit, the baseband unit determines the delay of the baseband unit according to the delay with the next-level baseband unit and the delay adjustment amount of the next-level baseband unit adjustment amount;

For each reference baseband unit, the reference baseband unit determines the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the delay with the next-level reference baseband unit, The delay adjustment data of the reference baseband unit includes the delay adjustment amount of the reference baseband unit and the delay adjustment amounts of all reference baseband units after the reference baseband unit at the reference baseband unit;

The target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module;

The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit.

Optionally, the fronthaul system module includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through an optical fiber; the target baseband unit and the target non-baseband unit are connected through an optical fiber, and the target non-baseband unit is a distance the nearest non-baseband unit of the baseband module;

The target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module, including:

The target baseband unit sends the delay adjustment data of the target baseband unit to the target non-baseband unit;

The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit, including:

The target non-baseband unit determines the delay adjustment data of the target non-baseband unit according to the delay adjustment data of the target baseband unit and the delay between the target baseband unit and the target baseband unit;

For each non-baseband unit in the fronthaul system module, the non-baseband unit determines the non-baseband The delay adjustment data of the unit, wherein the delay adjustment data includes delay adjustment amounts corresponding to multiple standards.

Optionally, the baseband unit determines the delay adjustment amount of the baseband unit according to the delay with the next-level baseband unit and the delay adjustment amount of the next-level baseband unit, including:

The baseband unit obtains the time delay with the next-level baseband unit;

The baseband unit obtains the delay adjustment amount of the baseband unit according to the delay adjustment amount of the next-stage baseband unit plus the time delay with the next-stage baseband unit.

Optionally, the reference baseband unit determines the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the delay with the next-level reference baseband unit, including:

The reference baseband unit acquires the time delay with the next-level reference baseband unit;

The reference baseband unit adds the delay adjustment amount in the delay adjustment data of the next-level reference baseband unit to the time delay with the next-level reference baseband unit to obtain all reference basebands after the reference baseband unit The delay adjustment amount of the unit at the reference baseband unit;

The delay adjustment data of the reference baseband unit is obtained according to the delay adjustment amounts of all reference baseband units following the reference baseband unit at the reference baseband unit and the delay adjustment amounts of the reference baseband unit.

Optionally, the target non-baseband unit determines the delay adjustment data of the target non-baseband unit according to the delay adjustment data and the delay between the target baseband unit, including:

The target non-baseband unit acquires the time delay between the target baseband unit;

The target non-baseband unit adds all delay adjustment amounts contained in the delay adjustment data of the target baseband unit to the delay between the target baseband unit and the target baseband unit to obtain the target non-baseband unit Latency adjustment data.

Optionally, the non-baseband unit determines the delay adjustment data of the non-baseband unit according to the delay with the next-level non-baseband unit and the delay adjustment data of the next-level non-baseband unit, including:

The time delay between the acquisition of the non-baseband unit and the next-level non-baseband unit;

The non-baseband unit adds all the delay adjustment amounts in the delay adjustment data of the next-level non-baseband unit to the time delay with the next-level non-baseband unit to obtain the time delay of the non-baseband unit. Delayed adjustment data.

Optionally, the method also includes:

The baseband unit stores the delay adjustment amount of the baseband unit;

The non-baseband unit having a radio frequency unit stores delay adjustment data of the non-baseband unit.

The second aspect of the present disclosure provides a distributed base station, including a baseband module and a fronthaul system module. The baseband module includes baseband unit groups corresponding to multiple standards; each baseband unit group contains multiple baseband units. The baseband units are sequentially cascaded through optical fibers, and the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and a plurality of the reference baseband units are sequentially cascaded through optical fibers; the target baseband unit and the fronthaul system module pass through Optical fiber connection, the target baseband unit is the baseband unit closest to the fronthaul system module; the fronthaul system module includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through optical fibers; the target baseband unit and the target non-baseband unit The baseband unit is connected by an optical fiber, the target baseband unit is the baseband unit closest to the fronthaul system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module; wherein the baseband unit, the The reference baseband unit and the target baseband unit are used to execute the method described in any one of the first aspect.

Optionally, the fronthaul system module includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through an optical fiber; the target baseband unit and the target non-baseband unit are connected through an optical fiber, and the target baseband unit is connected by a distance The baseband unit closest to the fronthaul system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module.

Optionally, different baseband units in the same baseband unit group are used to correspondingly process signals of different carriers.

The method for obtaining the delay adjustment amount and the distributed base station provided by the present disclosure, in the same baseband unit group, for each baseband unit, the baseband unit according to the delay with the next-level baseband unit and the next-level baseband The delay adjustment amount of the unit determines the delay adjustment amount of the baseband unit, so that in a baseband unit group, the baseband units are aligned step by step, and finally align with the reference baseband unit closest to the fronthaul system module in the baseband unit group. For the reference baseband unit in each baseband unit group, the reference baseband unit determines the delay of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the delay with the next-level reference baseband unit Adjustment data, the target baseband unit closest to the fronthaul system module in the baseband module obtains the delay adjustment amount of the reference baseband unit of all standards in the target baseband unit, and the target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module, The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit. Since each baseband unit in the baseband module adopts a step-by-step alignment method to determine the delay adjustment, it only needs to communicate with its adjacent baseband unit to obtain the delay adjustment, so the acquisition efficiency of the delay adjustment is improved . In the above embodiment, in the process of determining the delay adjustment of the baseband unit or the non-baseband unit, the calculation of the delay and the transfer of the delay adjustment are only related to the adjacent network elements. Need to flexibly expand network elements without recalculating the delay adjustment of existing network elements.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a distributed base station architecture provided by the present disclosure;

FIG. 2 is a schematic flowchart of an embodiment of a method for obtaining a delay adjustment amount provided by the present disclosure;

FIG. 3 is a schematic diagram of a specific distributed base station provided by the present disclosure;

FIG. 4 is a schematic diagram of another specific distributed base station provided by the present disclosure;

Fig. 5 is a schematic flowchart of another embodiment of a method for obtaining a delay adjustment amount provided in the present disclosure.

detailed description

In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

The standards of mobile communication include but are not limited to: Global System for Mobile Communications (GSM), Long Term Evolution (LTE), fifth generation mobile communication technology (5thgeneration mobile networks, 5G) and possible emerging after 5G communication system, etc.

Distributed base stations generally include: baseband units and non-baseband units, where non-baseband units generally refer to network elements in the fronthaul system, such as radio remote units and extension units; The base station is divided into a baseband module and a fronthaul system module, wherein the baseband module includes multiple baseband units, and the fronthaul system module includes multiple non-baseband network elements.

In order to meet the needs of operators and improve the capacity of the system coverage area, the distributed base station needs to support multiple standards and multiple carriers at the same time. Usually, a baseband unit processes the information of one carrier of one standard. Therefore, When a distributed base station needs to support multiple systems and multiple carriers, it usually needs to set up more baseband units. For example, to support N types of systems, and each system uses M carriers, it is necessary to set N×M baseband units. , where N is an integer greater than 1, and M is an integer greater than 1.

FIG. 1 is a schematic diagram of a distributed base station architecture provided by the present disclosure. As shown in FIG. 1 , the distributed base station includes: a baseband module 101 and a fronthaul system module 102 . Wherein, the baseband module 101 includes baseband unit groups corresponding to multiple standards, and one standard corresponds to one baseband unit group. In FIG. 1 , N kinds of standards are taken as an example. Each baseband unit group contains a plurality of baseband units, and the number of baseband units contained in baseband unit groups of different standards can be the same or different, for example, the baseband unit group of standard 1 contains 2 baseband units, and the baseband unit group of standard 2 The baseband unit group contains 3 baseband units. Specifically, how many baseband units are included in the baseband unit group of each standard can be set according to the specific application scenario. In Figure 1, the baseband unit group of each standard contains M basebands. unit is shown as an example. Multiple baseband units in a baseband unit group are sequentially cascaded through optical fibers. Taking the baseband unit group corresponding to standard 1 as an example, baseband unit 11, baseband unit 12, baseband unit 13, ..., baseband unit 1M in standard 1 are sequentially Cascade via fiber optics. The cascading manner of the baseband units in the baseband unit groups of other standards is similar to that of the baseband unit group of standard 1, and will not be repeated here. For ease of description, this disclosure describes the baseband unit closest to the fronthaul system in each baseband unit group as a reference baseband unit, and multiple reference baseband units are sequentially cascaded through optical fibers, for example, the baseband unit 11 of standard 1 and the baseband of standard 2 Units 21, . . . , baseband unit N1 of standard N are sequentially cascaded through optical fibers. This disclosure describes the baseband unit closest to the fronthaul system as the target baseband unit, for example, the baseband unit 11 in FIG. 1 is the target baseband unit, and the baseband unit 11 is connected to the fronthaul system through an optical fiber. Optionally, the fronthaul system module 102 includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through an optical fiber, and the non-baseband unit closest to the baseband module is described as a target non-baseband unit, for example, the non-baseband unit in FIG. 1 11 is a target non-baseband unit, and the target baseband unit 11 and the target non-baseband unit 11 are connected by an optical fiber. Optionally, in the architecture of the distributed base station shown in FIG. 1, different baseband units in the same baseband unit group are used to process signals of different carriers correspondingly, where X is an integer greater than 1, and Y is an integer greater than 1. integer.

In a Time Division Duplexing (TDD) system, since the uplink transmission and the downlink transmission use the same frequency band, in order to avoid crosstalk between the uplink transmission and the downlink transmission, it is necessary to ensure that the downlink transmission data of the distributed base station is within Air interface time alignment and uplink received data are aligned at air interface time.

As shown in Figure 1, the baseband units and non-baseband units in the distributed base station are usually distributed in different physical locations, and their distances from the air interface may be different. Therefore, the transmission delay may be different. To achieve air interface time alignment, it is necessary to The delay adjustment amount buffers the data received uplink or the data sent downlink.

The method for obtaining the delay adjustment value of the distributed base station of the present disclosure will be described below with several specific embodiments.

The "upper level" and "lower level" described in the following embodiments of the present disclosure are distinguished relative to the transmission distance of the air interface. For example, the two adjacent baseband units are the baseband unit 11 and the baseband unit 12, respectively. Wherein, the baseband unit 11 is closer to the air interface than the baseband unit 12, then the baseband unit 11 is described as the upper-level baseband unit of the baseband unit 12, and the baseband unit 12 is the lower-level baseband unit of the baseband unit 11. Another example is the non-baseband unit 11 and the non-baseband unit 12, wherein the non-baseband unit 11 is farther from the air interface than the non-baseband unit 12 is farther from the air interface, then the non-baseband unit 11 is described as the next-level non-baseband unit of the non-baseband unit 12, The baseband unit 12 is an upper level non-baseband unit of the baseband unit 11 .

All baseband units of the same standard have the same downlink advance amount, all baseband units of the same standard have the same uplink lag amount, and the downlink advance amount and uplink lag amount of the same standard can be the same or different. For example, if the downlink advance of standard 1 is T1, the transmission delay of data sent by all baseband units of standard 1 from the baseband unit to the air interface is T1, thus ensuring that the downlink data is aligned at the air interface. For another example, if the uplink hysteresis of standard 1 is T2, the transmission delay from sending data through the air interface to receiving data at all baseband units of standard 1 is T2, thus ensuring that the uplink received data is aligned at the air interface time. Different systems have different downlink advances, and different systems have different uplink lags.

FIG. 2 is a schematic flowchart of an embodiment of a method for obtaining a delay adjustment amount provided by the present disclosure. The method of this embodiment is applied to the distributed base station shown in FIG. 1 , and the method of this embodiment is as follows:

S201: In the same baseband unit group, for each baseband unit, the baseband unit determines the delay adjustment amount of the baseband unit according to the delay with the next-level baseband unit and the delay adjustment amount of the next-level baseband unit .

Wherein, the delay with the next-level baseband unit includes: the transmission delay of the transmission path between the baseband unit and the next-level baseband unit and the uplink processing delay of the baseband unit; or, the baseband The transmission delay of the transmission path between the unit and the next-level baseband unit and the downlink processing delay of the baseband unit.

Specifically, the baseband unit obtains the time delay with the next-level baseband unit, and the baseband unit adds the time delay with the next-level baseband unit to the time-delay adjustment amount of the next-level baseband unit to obtain the time-delay adjustment amount of the baseband unit.

Optionally, the baseband unit can obtain the time delay with the next-level baseband unit through but not limited to the following possible implementation methods. For example, the baseband unit can send a measurement signal to the next-level baseband unit, according to the round-trip time delay of the measurement signal , to determine the time delay with the next-level baseband unit, and the transmission time delay is 1/2 of the round-trip time delay. Wherein, the measurement signal may be, for example, an Internet packet explorer (Packet Internet Groper, PING) signaling.

Assuming that M=5 and N=5 in Figure 1, the baseband modules of the distributed base station are shown in Figure 3. Baseband unit group 1 corresponds to standard 1, baseband unit group 2 corresponds to standard 2, and baseband unit group 3 corresponds to standard 3 Correspondingly, baseband unit group 4 corresponds to standard 4, and baseband unit group 5 corresponds to standard 5. Taking baseband unit group 1 as an example, all baseband units in baseband unit group 1 process the data of standard 1, and baseband unit group 1 includes baseband unit 11, baseband unit 12, baseband unit 13, baseband unit 14 and baseband unit 15, the delay adjustment amount of the baseband unit 15 is T15, the baseband unit 14 acquires the delay t1 between the baseband unit 15, the baseband unit 14 receives the delay adjustment amount T15 of the baseband unit 15 sent by the baseband unit 15, and the baseband unit 14 According to the delay adjustment amount T15 of the baseband unit 15 plus the delay t1 between the baseband unit 15, the delay adjustment amount T14 of the baseband unit 14 is obtained, where T14=T15+t1. Similarly, the baseband unit 14 sends its delay adjustment amount T14 to the baseband unit 13, the baseband unit 13 obtains the time delay t2 between the baseband unit 14, and the baseband unit 13 receives the delay adjustment of the baseband unit 14 sent by the baseband unit 14 Amount T14, the baseband unit 13 obtains the delay adjustment amount T13 of the baseband unit 13 according to the delay adjustment amount T14 of the baseband unit 14 plus the delay t2 between the baseband unit 14 and the baseband unit 14, wherein T13=T14+t2. The baseband unit 13 sends its delay adjustment amount T13 to the baseband unit 12, the baseband unit 12 acquires the time delay t3 between the baseband unit 13, and the baseband unit 12 receives the delay adjustment amount T13 of the baseband unit 13 sent by the baseband unit 13, The baseband unit 12 obtains the delay adjustment amount T12 of the baseband unit 12 according to the delay adjustment amount T13 of the baseband unit 13 plus the delay t3 with the baseband unit 13, wherein T12=T13+t3. The baseband unit 12 sends its delay adjustment amount T12 to the baseband unit 11, the baseband unit 11 obtains the time delay t4 between the baseband unit 12, and the baseband unit 11 receives the delay adjustment amount T12 of the baseband unit 12 sent by the baseband unit 12, The baseband unit 11 obtains the delay adjustment amount T11 of the baseband unit 11 according to the delay adjustment amount T12 of the baseband unit 12 plus the delay t4 between the baseband unit 12, wherein T11=T12+t4. Similarly, each baseband unit in each baseband unit group can obtain the delay adjustment amount of each baseband unit in the same manner.

For ease of understanding, the present disclosure also provides a table to represent the delay adjustment amount of the same group of baseband units, as shown in Table 1:

Table 1

Through the step of S201, the time delay adjustments of all baseband units in the baseband module can be obtained.

Optionally, in the foregoing embodiment, the delay adjustment amount of the last-stage baseband unit may be 0, or may be other values. If it is set to other values, when the baseband unit is cascaded after the last-level baseband unit, the delay adjustment amount of the original last-level baseband unit can be subtracted from the delay adjustment amount of the new last-level baseband unit to obtain a new The delay adjustment amount of the last stage baseband unit; The time delay between the baseband units 16 obtains the time delay adjustment amount of the baseband unit 16, without requiring all the baseband units to re-determine the time delay adjustment amount, further improving the acquisition efficiency of the time delay adjustment amount.

S202: For each reference baseband unit, the reference baseband unit determines the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the time delay with the next-level reference baseband unit.

Wherein, the delay adjustment data of the reference baseband unit includes the delay adjustment amount of the reference baseband unit and the delay adjustment amounts of all reference baseband units after the reference baseband unit at the reference baseband unit.

For example, in combination with the aforementioned example shown in FIG. 3 , baseband unit 11, baseband unit 21, baseband unit 31, baseband unit 41, and baseband unit 51 are all reference baseband units. Baseband unit 11 corresponds to standard 1, and baseband unit 21 corresponds to standard 2. , the baseband unit 31 corresponds to standard 3, the baseband unit 41 corresponds to standard 4, and the baseband unit 51 corresponds to standard 5; the delay adjustment data of the baseband unit 51 is the delay adjustment amount of the reference baseband unit 51, and the delay adjustment data of the baseband unit 41 includes : the delay adjustment amount of the baseband unit 51 at the reference unit 41, and the delay adjustment amount of the baseband unit 41; the delay adjustment data of the baseband unit 31 includes: the time when the baseband unit 41 and the baseband unit 51 are at the baseband unit 31 respectively delay adjustment amount, and the delay adjustment amount of baseband unit 51; the delay adjustment data of baseband unit 21 includes: the delay adjustment amount of baseband unit 31, baseband unit 41 and baseband unit 51 at baseband unit 21 respectively, and the The delay adjustment amount of the baseband unit 21; the delay adjustment data of the baseband unit 11 includes: the delay adjustment amount of the baseband unit 21, the baseband unit 31, the baseband unit 41 and the baseband unit 51 at the baseband unit 11 respectively, and the baseband Delay adjustment amount of unit 11.

The reference baseband unit acquires the time delay with the next-level reference baseband unit. The reference baseband unit adds the delay adjustment amount in the delay adjustment data of the next-level reference baseband unit to the time delay with the next-level reference baseband unit to obtain all reference baseband units after the reference baseband unit. The delay adjustment amount at the reference baseband unit. The delay adjustment data of the reference baseband unit is obtained according to the delay adjustment amounts of all reference baseband units following the reference baseband unit at the reference baseband unit and the delay adjustment amounts of the reference baseband unit.

For example, in combination with the foregoing example: the delay adjustment data of the baseband unit 51 includes the delay adjustment amount T51 of the baseband unit 51, wherein the delay adjustment amount T51 of the baseband unit 51 is obtained through S201. The baseband unit 51 sends its delay adjustment data to the baseband unit 41, the baseband unit 41 acquires the time delay t54 between the baseband unit 51, and the baseband unit 41 adds the transmission time delay t54 to T51 in the time delay adjustment data of the baseband unit 51 to obtain The time delay adjustment amount T514 of the baseband unit 51 at the baseband unit 41, where T514=T51+t54. According to the delay adjustment amount T514 of the baseband unit 51 at the baseband unit 41 and the delay adjustment amount T41 of the baseband unit 41, the delay adjustment data of the baseband unit 41 is obtained, and the delay adjustment data of the baseband unit 41 includes: T41 and T514 . The baseband unit 41 sends its delay adjustment data to the baseband unit 31, the baseband unit 31 obtains the time delay t43 between the baseband unit 41, and the baseband unit 31 adds t43 to T41 and T514 in the time delay adjustment data of the baseband unit 41 , obtain the time delay adjustment T513 of the baseband unit 51 at the baseband unit 31 and the time delay adjustment T413 of the baseband unit 41 at the baseband unit 31, wherein, T513=T514+t43, T413=T513+t43; The delay adjustment data includes T31, T413 and T513. The baseband unit 31 sends its delay adjustment data to the baseband unit 21, and the baseband unit 21 obtains the delay t32 between the baseband unit 31; the baseband unit 21 adjusts T31 in the delay adjustment data according to the transmission delay t32 and the baseband unit 31 . , wherein, T512=T513+t32; T412=T413+t32; T312=T313+t32. The baseband unit 21 sends its delay adjustment data to the baseband unit 11, and the baseband unit 11 obtains the time delay t21 between the baseband unit 21; . The amount T311, the delay adjustment amount T211 of the baseband unit 21 at the baseband unit 11, where T511=T512+t21; T411=T412+t21; T311=T312+t21; T211=T311+t21. Wherein, T51, T41, T31, T21 and T11 can all be obtained through the step of S201.

The disclosure also provides a table to represent the delay adjustment amount of the same group of baseband units, as shown in Table 2:

Table 2

Through the step of S202, the baseband unit 11 can acquire the delay buffering amounts of all the standards at the baseband unit 11.

S203: The target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module.

S204: The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit.

The target non-baseband unit in the fronthaul system module receives the delay adjustment data sent by the target baseband unit, updates the delay adjustment data according to the delay between the target non-baseband unit and the target baseband unit, and obtains the time delay adjustment data of various formats in the target The amount of delay adjustment at the non-baseband unit.

The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit, including but not limited to the following possible implementation methods:

A possible implementation method, the target non-baseband unit obtains the delay adjustment amount of each system at the target non-baseband unit, and transmits it step by step according to the cascading relationship of the non-baseband unit. For non-baseband units of the first stage, the delay adjustment amount of each target non-baseband unit is added to the delay between the next-level non-baseband unit to obtain the delay adjustment data of each standard at each non-baseband unit.

In this embodiment, in the same baseband unit group, for each baseband unit, the baseband unit determines the time delay of the baseband unit according to the delay with the next-level baseband unit and the delay adjustment amount of the next-level baseband unit. Therefore, in a baseband unit group, the baseband units are aligned step by step, and finally aligned with the reference baseband unit closest to the fronthaul system module in the baseband unit group. For the reference baseband unit in each baseband unit group, the reference baseband unit determines the delay of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the delay with the next-level reference baseband unit Adjustment data, the target baseband unit closest to the fronthaul system module in the baseband module obtains the delay adjustment amount of the reference baseband unit of all standards in the target baseband unit, and the target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module, The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit. Since each baseband unit in the baseband module adopts a step-by-step alignment method to determine the delay adjustment, it only needs to communicate with its adjacent baseband unit to obtain the delay adjustment, so the acquisition efficiency of the delay adjustment is improved .

In the above embodiments, in the process of determining the delay adjustment of the baseband unit or non-baseband unit, the measurement of the delay and the transfer of the delay adjustment are only related to the adjacent network elements. Need to flexibly expand network elements without recalculating the delay adjustment of existing network elements.

Specifically, when a new baseband unit needs to be added, it is only necessary to connect the original last-level baseband unit to the new baseband unit through an optical fiber, and the calculation and transmission of the delay are only related to adjacent baseband units, that is, according to the The time delay between the baseband unit and the newly added baseband unit and the time delay adjustment amount of the original last stage baseband unit can determine the time delay adjustment amount of the newly added baseband unit. When it is necessary to add a non-baseband unit, it is only necessary to connect the original last-level non-baseband unit to a new non-baseband unit through an optical fiber. The calculation and transmission of the delay are only related to the adjacent non-baseband unit, that is, according to the The time delay between the first-level non-baseband unit and the new non-baseband unit and the delay adjustment data of the original last-level non-baseband unit can determine the delay adjustment data of the newly added non-baseband unit. Therefore, the distributed base station is improved. Expanded flexibility.

Fig. 5 is a schematic flowchart of another embodiment of a method for obtaining a delay adjustment amount provided by the present disclosure. Fig. 5 is based on the embodiment shown in Fig. 2 , further, each non-baseband unit in the fronthaul system module A description of a possible implementation of obtaining the delay adjustment amount is shown in Figure 5:

On the basis of the embodiment shown in Figure 2, a possible implementation of S203 is as S203':

S203': The target baseband unit sends the delay adjustment data of the target baseband unit to the target non-baseband unit.

In combination with the foregoing example, the target baseband unit is baseband unit 11, and the target baseband unit sends the delay adjustment data of the target baseband unit to the forward transmission system. In combination with Table 1, baseband unit 11 obtains baseband unit 51, baseband unit 41, baseband unit 31, baseband The delay adjustment amounts of the units 21 at the baseband unit 11 respectively, that is, the baseband unit 11 obtains the delay adjustment amounts of all systems at the baseband unit 11 .

The target baseband unit sends the delay adjustments at the baseband unit 11 for all systems to the target non-baseband unit 11 of the fronthaul system module.

A possible implementation of S204 in FIG. 2 is shown in S2041 and S2042:

S2041: The target non-baseband unit in the fronthaul system module determines the delay adjustment data of the target non-baseband unit according to the delay adjustment data of the target baseband unit and the time delay with the target baseband unit.

One implementation method is: the target non-baseband unit obtains the time delay between the target baseband unit, assuming that the time delay is t0; the target non-baseband unit adds all the time delay adjustments contained in the time delay adjustment data of the target baseband unit to The time delay between the above and the target baseband unit is obtained to obtain the time delay adjustment data of the target baseband unit. In conjunction with the foregoing example, the delay adjustment data of the target baseband unit includes: T11, T211, T311, T411 and T511, assuming that the delay between the target non-baseband unit and the target baseband unit is t0, then the delay adjustment of the target non-baseband unit The data includes: T11+t0, T211+t0, T311+t0, T411+t0 and T511+t0.

S2042: For each non-baseband unit in the fronthaul system module, the non-baseband unit determines the delay adjustment data of the non-baseband unit according to the delay with the next-level non-baseband unit and the delay adjustment data of the next-level non-baseband unit , wherein the delay adjustment data includes delay adjustment amounts corresponding to multiple standards.

One implementation method is: for each non-baseband unit in the fronthaul system module, the non-baseband unit obtains the delay with the next-level non-baseband unit, and adjusts all the delays in the delay adjustment data of the next-level non-baseband unit The time delay with the next-level non-baseband unit is added to the time delay of the non-baseband unit to obtain the time delay adjustment data of the non-baseband unit.

Wherein, the delay with the next-level non-baseband unit includes: the transmission delay of the transmission path between the non-baseband unit and the next-level non-baseband unit and the uplink processing delay of the non-baseband unit; or , the transmission delay of the transmission path between the non-baseband unit and the next-stage non-baseband unit and the downlink processing delay of the non-baseband unit.

With reference to the foregoing example, the delay adjustment data of the target non-baseband unit includes: T11+t0, T211+t0, T311+t0, T411+t0, and T511+t0. Take non-baseband unit 11, non-baseband unit 12, non-baseband unit 13, non-baseband unit 14 and non-baseband unit 15 as an example; wherein, non-baseband unit 11, non-baseband unit 12, non-baseband unit 13, non-baseband unit 14 and The non-baseband unit 15 is sequentially connected by optical fiber, the time delay between the non-baseband unit 12 and the non-baseband unit 11 is t01, the time delay between the non-baseband unit 13 and the non-baseband unit 12 is t02, and the time delay between the non-baseband unit 14 and the non-baseband unit 12 is t02. The time delay between the units 13 is t03, the time delay between the non-baseband unit 15 and the non-baseband unit 14 is t04; then the time delay adjustment data of the non-baseband unit 12 is T11+t0+t01, T211+t0+t01, T311+t0+t01, T411+t0+t01 and T511+t0+t01; the delay adjustment data of the non-baseband unit 13 is T11+t0+t01+t02, T211+t0+t01+t02, T311+t0+t01+ t02, T411+t0+t01+t02 and T511+t0+t01+t02; the delay adjustment data of the non-baseband unit 14 is T11+t0+t01+t02+t03, T211+t0+t01+t02+t03, T311+ t0+t01+t02+t03, T411+t0+t01+t02+t03 and T511+t0+t01+t02+t03; the delay adjustment data of the non-baseband unit 15 is T11+t0+t01+t02+t03+t04, T211+t0+t01+t02+t03+t04, T311+t0+t01+t02+t03+t04, T411+t0+t01+t02+t03+t04, and T511+t0+t01+t02+t03+t04.

By means of S2042, the time delay adjustment data of each non-baseband unit can be obtained, that is, the time delay adjustment amount of multiple standards at each non-baseband unit can be obtained.

In this embodiment, on the basis of the embodiment shown in Figure 2, the target baseband unit further sends the delay adjustment data of the target baseband unit to the target non-baseband unit, and for each non-baseband unit in the fronthaul system module, the non-baseband unit Determine the delay adjustment data of the non-baseband unit according to the delay with the next-level non-baseband unit and the delay adjustment data of the next-level non-baseband unit, that is, the target non-baseband unit obtains each standard at the target non-baseband unit According to the cascading relationship of the non-baseband units, the delay adjustment amount is transferred step by step. During the transfer process, each time a non-baseband unit passes through, the delay adjustment amount of each target non-baseband unit is added to The time delay between the non-baseband unit and the next-level non-baseband unit obtains the time delay adjustment data of each standard at each non-baseband unit. Since each non-baseband unit in the fronthaul system module adopts a step-by-step alignment method to determine the delay adjustment data, it only needs to communicate with its adjacent non-baseband unit to obtain the delay adjustment data, so the delay is further improved Acquisition efficiency of the adjustment amount.

In the above embodiments, the non-baseband units included in the fronthaul system module include non-baseband units with radio frequency modules and non-baseband units without radio frequency modules, and the non-baseband units with radio frequency modules store delay adjustment data, so that when there is When data is sent and received, the data is buffered and processed according to the delay adjustment data.

The baseband unit in the baseband module needs to store its own delay buffer.

The distributed base station in the embodiment shown in FIG. 1 corresponds to the technical solutions that can be used to implement the above method embodiments. The implementation principles and technical effects are similar, and will not be repeated here.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method for obtaining a delay adjustment amount, which is characterized in that it is applied to a distributed base station, and the distributed base station includes a baseband module and a fronthaul system module, and the baseband module includes baseband unit groups corresponding to multiple standards; Each baseband unit group contains a plurality of baseband units, and the plurality of baseband units are sequentially cascaded through optical fibers, and the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and a plurality of the reference basebands The units are sequentially cascaded through optical fibers; the target baseband unit is connected to the fronthaul system module through optical fibers, and the target baseband unit is the baseband unit closest to the fronthaul system module; The methods include: In the same baseband unit group, for each baseband unit, the baseband unit determines the delay of the baseband unit according to the delay with the next-level baseband unit and the delay adjustment amount of the next-level baseband unit adjustment amount; For each reference baseband unit, the reference baseband unit determines the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next-level reference baseband unit and the delay with the next-level reference baseband unit, The delay adjustment data of the reference baseband unit includes the delay adjustment amount of the reference baseband unit and the delay adjustment amounts of all reference baseband units after the reference baseband unit at the reference baseband unit; The target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module; The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit. 2. The method according to claim 1, wherein the fronthaul system module comprises a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through optical fibers; the target baseband unit and the target non-baseband unit are passed through optical fiber connection, the target non-baseband unit is the nearest non-baseband unit to the baseband module; The target baseband unit sends the delay adjustment data of the target baseband unit to the fronthaul system module, including: The target baseband unit sends the delay adjustment data of the target baseband unit to the target non-baseband unit; The fronthaul system module determines the delay adjustment data of each non-baseband unit in the fronthaul system according to the delay adjustment data of the target baseband unit, including: The target non-baseband unit determines the delay adjustment data of the target non-baseband unit according to the delay adjustment data of the target baseband unit and the delay between the target baseband unit and the target baseband unit; For each non-baseband unit in the fronthaul system module, the non-baseband unit determines the non-baseband The delay adjustment data of the unit, wherein the delay adjustment data includes delay adjustment amounts corresponding to multiple standards. 3. The method according to claim 1 or 2, wherein the baseband unit determines the baseband unit according to the time delay with the next-level baseband unit and the time-delay adjustment amount of the next-level baseband unit The amount of delay adjustment, including: The baseband unit obtains the time delay with the next-level baseband unit; The baseband unit obtains the delay adjustment amount of the baseband unit according to the delay adjustment amount of the next-stage baseband unit plus the time delay with the next-stage baseband unit. 4. The method according to claim 1 or 2, wherein the reference baseband unit determines the time delay adjustment data of the next-level reference baseband unit and the time delay with the next-level reference baseband unit. The delay adjustment data of the reference baseband unit, including: The reference baseband unit acquires the time delay with the next-level reference baseband unit; The reference baseband unit adds the delay adjustment amount in the delay adjustment data of the next-level reference baseband unit to the time delay with the next-level reference baseband unit to obtain all reference basebands after the reference baseband unit The delay adjustment amount of the unit at the reference baseband unit; The delay adjustment data of the reference baseband unit is obtained according to the delay adjustment amounts of all reference baseband units following the reference baseband unit at the reference baseband unit and the delay adjustment amounts of the reference baseband unit. 5. The method according to claim 2, wherein the target non-baseband unit determines the timing of the target non-baseband unit according to the delay adjustment data and the time delay between the target baseband unit and the target baseband unit. Deferred adjustment data, including: The target non-baseband unit acquires the time delay between the target baseband unit; The target non-baseband unit adds all delay adjustment amounts contained in the delay adjustment data of the target baseband unit to the delay between the target baseband unit and the target baseband unit to obtain the target non-baseband unit Latency adjustment data. 6. The method according to claim 5, wherein the non-baseband unit determines the non-baseband unit according to the time delay with the next-level non-baseband unit and the time-delay adjustment data of the next-level non-baseband unit. Delay adjustment data of the baseband unit, including: The time delay between the acquisition of the non-baseband unit and the next-level non-baseband unit; The non-baseband unit adds all the delay adjustment amounts in the delay adjustment data of the next-level non-baseband unit to the time delay with the next-level non-baseband unit to obtain the time delay of the non-baseband unit. Delayed adjustment data. 7. The method according to claim 2, further comprising: The baseband unit stores the delay adjustment amount of the baseband unit; The non-baseband unit having a radio frequency unit stores delay adjustment data of the non-baseband unit. 8. A distributed base station, characterized in that it includes a baseband module and a fronthaul system module, the baseband module includes baseband unit groups corresponding to multiple standards; each baseband unit group contains a plurality of baseband units, and the plurality of baseband units The baseband units are sequentially cascaded through optical fibers, and the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and a plurality of the reference baseband units are sequentially cascaded through optical fibers; the target baseband unit and the fronthaul system module pass through Optical fiber connection, the target baseband unit is the baseband unit closest to the fronthaul system module; the fronthaul system module includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through optical fibers; the target baseband unit and the target non-baseband unit The baseband unit is connected by an optical fiber, the target baseband unit is the baseband unit closest to the fronthaul system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module; wherein the baseband unit, the The reference baseband unit and the target baseband unit are used to execute the method according to any one of claims 1-7. 9. The distributed base station according to claim 8, wherein the fronthaul system module includes a plurality of non-baseband units, and the plurality of non-baseband units are cascaded through optical fibers; the target baseband unit and the target non-baseband The units are connected by optical fiber, the target baseband unit is the baseband unit closest to the fronthaul system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module. 10. The distributed base station according to claim 9, wherein different baseband units in the same baseband unit group are used to process signals of different carriers correspondingly.

Images