CN112867133A - Method for acquiring time delay adjustment amount and distributed base station - Google Patents
Method for acquiring time delay adjustment amount and distributed base station Download PDFInfo
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- CN112867133A CN112867133A CN202011623732.8A CN202011623732A CN112867133A CN 112867133 A CN112867133 A CN 112867133A CN 202011623732 A CN202011623732 A CN 202011623732A CN 112867133 A CN112867133 A CN 112867133A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method for obtaining a delay adjustment amount and a distributed base station.
Background
With the continuous development of mobile communication, in order to meet the operation requirements of operators, a base station needs to support multiple standards, and in order to increase the capacity of a coverage area of the base station, the base station needs to support multiple carriers at the same time.
In order to meet the coverage requirements of various complex scenes, a distributed base station appears, and generally comprises three types of network elements, a baseband unit, a radio remote unit and an extension unit. Because the base station supports both multiple systems and multiple carriers, the number of network elements in the distributed base station is large, and the network elements are connected through optical fibers. In order to ensure the performance of uplink transmission and downlink transmission of the base station, it is necessary to ensure that downlink data sent by the distributed base station is aligned at an air interface time and that received uplink data is aligned at an air interface time. In the prior art, the measured values of optical fiber delays between all network elements need to be sent to a baseband unit, the inherent delay amounts inside all network elements also need to be sent to the baseband unit, then the baseband unit calculates the delay adjustment amount of each non-baseband unit, and sends the delay adjustment amount of each non-baseband unit to each non-baseband unit, and each non-baseband unit caches data according to the delay adjustment amount when sending or receiving data, thereby achieving alignment of downlink data sent by a distributed base station at an air interface time and alignment of received uplink data at the air interface time.
By adopting the method in the prior art, the efficiency of obtaining the delay adjustment quantity of each network element in the distributed base station is not high. In addition, in the process of obtaining the delay adjustment amount, each network element has close relationship, which is a close coupling relationship, and is not beneficial for an operator to expand and increase network elements on an operated base station according to the service expansion requirement.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a method for acquiring a delay adjustment amount and a distributed base station, which improves 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 forwarding system module, and the baseband module includes baseband unit groups corresponding to multiple systems, respectively; each baseband unit group comprises a plurality of baseband units which are sequentially cascaded through optical fibers, the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and the reference baseband units are sequentially cascaded through the optical fibers; the target baseband unit is connected with the forward transmission system module through an optical fiber, and the target baseband unit is the baseband unit closest to the forward transmission system module;
the method comprises the following steps:
in the same baseband unit group, aiming at each baseband unit, the baseband unit determines the time delay adjustment quantity of the baseband unit according to the time delay of the next-stage baseband unit and the time delay adjustment quantity of the next-stage baseband unit;
for each reference baseband unit, the reference baseband unit determines delay adjustment data of the reference baseband unit according to delay adjustment data of a next-stage reference baseband unit and delay of the next-stage reference baseband unit, where the delay adjustment data of the reference baseband unit includes delay adjustment amounts of the reference baseband unit and delay adjustment amounts of all reference baseband units behind the reference baseband unit at the reference baseband unit;
the target baseband unit sends the time delay adjustment data of the target baseband unit to the forwarding system module;
and the forward transmission system module determines the time delay adjustment data of each non-baseband unit in the forward transmission system according to the time 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 is connected with the target non-baseband unit through an optical fiber, and the target non-baseband unit is a non-baseband unit closest to the baseband module;
the target baseband unit sends the delay adjustment data of the target baseband unit to the forwarding system module, and the method includes:
the target baseband unit sends the time delay adjustment data of the target baseband unit to the target non-baseband unit;
the forwarding system module determines the delay adjustment data of each non-baseband unit in the forwarding system according to the delay adjustment data of the target baseband unit, and the method comprises the following steps:
the target non-baseband unit determines the time delay adjustment data of the target non-baseband unit according to the time delay adjustment data of the target baseband unit and the time delay between the target non-baseband unit and the target baseband unit;
and aiming at each non-baseband unit in the forward transmission system module, the non-baseband unit determines delay adjustment data of the non-baseband unit according to the delay of the next non-baseband unit and the delay adjustment data of the next non-baseband unit, wherein the delay adjustment data comprises delay adjustment amounts corresponding to a plurality of systems respectively.
Optionally, the determining, by the baseband unit, the delay adjustment amount of the baseband unit according to the delay of the next baseband unit and the delay adjustment amount of the next baseband unit includes:
the baseband unit acquires the time delay with the next-stage baseband unit;
and the baseband unit obtains the delay adjustment quantity of the baseband unit according to the sum of the delay adjustment quantity of the next-stage baseband unit and the delay of the next-stage baseband unit.
Optionally, the determining, by the reference baseband unit, the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next-stage reference baseband unit and the delay of the next-stage reference baseband unit includes:
the reference baseband unit acquires the time delay with the next-stage reference baseband unit;
the reference baseband unit adds the delay adjustment quantity in the delay adjustment data of the next-stage reference baseband unit to the delay of the next-stage reference baseband unit to obtain the delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit;
and obtaining the time delay adjustment data of the reference baseband unit according to the time delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit and the time delay adjustment quantity of the reference baseband unit.
Optionally, the determining, by the target non-baseband unit, the delay adjustment data of the target non-baseband unit according to the delay adjustment data and the delay with the target baseband unit includes:
the target non-baseband unit acquires time delay between the target non-baseband unit and the target baseband unit;
and 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 non-baseband unit and the target baseband unit to obtain the delay adjustment data of the target non-baseband unit.
Optionally, the determining, by the non-baseband unit, the delay adjustment data of the non-baseband unit according to the delay of the non-baseband unit of the next stage and the delay adjustment data of the non-baseband unit of the next stage includes:
the non-baseband unit acquires the time delay with the next-stage non-baseband unit;
and the non-baseband unit adds all the time delay adjustment quantities in the time delay adjustment data of the next-stage non-baseband unit to the time delay of the next-stage non-baseband unit to obtain the time delay adjustment data of the non-baseband unit.
Optionally, the method further includes:
the baseband unit stores the time 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.
A second aspect of the present disclosure provides a distributed base station, including a baseband module and a fronthaul system module, where the baseband module includes baseband unit groups corresponding to multiple systems, respectively; each baseband unit group comprises a plurality of baseband units which are sequentially cascaded through optical fibers, the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and the reference baseband units are sequentially cascaded through the optical fibers; the target baseband unit is connected with the forward transmission system module through an optical fiber, and the target baseband unit is the baseband unit closest to the forward transmission system module; the forwarding system module comprises a plurality of non-baseband units which are cascaded through optical fibers; the target baseband unit is connected with the target non-baseband unit through an optical fiber, the target baseband unit is the baseband unit closest to the forward transmission system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module; wherein the baseband unit, the reference baseband unit and the target baseband unit are configured to perform the method of any 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, 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.
Optionally, different baseband units in the same baseband unit group are used for correspondingly processing signals of different carriers.
According to the method for obtaining the delay adjustment amount and the distributed base station, the delay adjustment amount of the baseband unit is determined according to the delay of the baseband unit with the next stage and the delay adjustment amount of the baseband unit with the next stage in the same baseband unit group aiming at each baseband unit, so that the baseband units are aligned step by step in one baseband unit group and finally aligned with the reference baseband unit closest to the fronthaul system module in the baseband unit group. And aiming at a reference baseband unit in each baseband unit group, determining the delay adjustment data of the reference baseband unit according to the delay adjustment data of a next-stage reference baseband unit and the delay of the next-stage reference baseband unit by the reference baseband unit, acquiring the delay adjustment quantity of the reference baseband unit of all systems in a target baseband unit by a target baseband unit closest to a forward transmission system module in the baseband module, sending the delay adjustment data of the target baseband unit to the forward transmission system module by the target baseband unit, and determining the delay adjustment data of each non-baseband unit in the forward transmission system by the forward transmission system module according to the delay adjustment data of the target baseband unit. Because each baseband unit in the baseband module determines the delay adjustment amount in a step-by-step alignment manner, the delay adjustment amount can be obtained only by communicating with the adjacent baseband unit, and therefore, the obtaining efficiency of the delay adjustment amount is improved. In the above embodiment, in the process of determining the delay adjustment amount of the baseband unit or the non-baseband unit, the calculation of the delay and the transmission of the delay adjustment amount are only related to the adjacent network elements, so that the network elements can be flexibly expanded according to the service requirements of operators, and the delay adjustment amount of the existing network elements does not need to be recalculated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic architecture diagram of a distributed base station according to the present disclosure;
fig. 2 is a schematic flowchart of an embodiment of a method for obtaining a delay adjustment according to 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 method for obtaining a delay adjustment according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
The standards of mobile communication include, but are not limited to: global System for Mobile Communications (GSM), Long Term Evolution (LTE), 5th generation Mobile communication technology (5G), and communication systems that may appear after 5G.
The distributed base station generally includes: the system comprises a baseband unit and a non-baseband unit, wherein the non-baseband unit generally refers to a network element in a forward transmission system, such as a radio remote unit and an extension unit; for convenience of description, the distributed base station is divided into a baseband module and a fronthaul system module, where the baseband module includes a plurality of baseband units, and the fronthaul system module includes a plurality of non-baseband network elements.
In order to meet the needs of operators and improve the capacity of a system coverage area, a distributed base station needs to support multiple systems and multiple carriers at the same time, and generally, one baseband unit processes information of one carrier of one system, so when the distributed base station needs to support multiple systems and multiple carriers, more baseband units are generally needed to be set, for example, N systems are supported, each system employs M carriers, and then N × M baseband units need to be set, where N is an integer greater than 1 and M is an integer greater than 1.
Fig. 1 is a schematic architecture diagram of a distributed base station provided in the present disclosure, and as shown in fig. 1, the distributed base station includes: a baseband module 101 and a fronthaul system module 102. The baseband module 101 includes baseband unit groups corresponding to multiple systems, and one system corresponds to one baseband unit group, which is illustrated as N systems in fig. 1. Each baseband unit group includes a plurality of baseband units, and the number of baseband units included in baseband unit groups of different systems may be the same or different, for example, the baseband unit group of system 1 includes 2 baseband units, the baseband unit group of system 2 includes 3 baseband units, specifically, the baseband unit group of each system includes several baseband units that may be set according to a specific application scenario, and fig. 1 illustrates that the baseband unit group of each system includes M baseband units. A plurality of baseband units in one baseband unit group are sequentially cascaded through an optical fiber, and taking the baseband unit group corresponding to the system 1 as an example, the baseband unit 11, the baseband unit 12, the baseband units 13 and … …, and the baseband unit 1M in the system 1 are sequentially cascaded through an optical fiber. The cascade mode of the baseband units in the baseband unit groups of other systems is similar to that of the baseband unit group of system 1, and is not described in detail. For convenience of description, the present disclosure describes a 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 an optical fiber, for example, the baseband unit 11 of the system 1, the baseband units 21 and … … of the system 2, and the baseband unit N1 of the system N are sequentially cascaded through an optical fiber. The present 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 and the fronthaul system are connected by 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 a non-baseband unit closest to the baseband module is described as a target non-baseband unit, for example, the non-baseband unit 11 in fig. 1 is a target non-baseband unit, and the target baseband unit 11 and the target non-baseband unit 11 are connected through 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 for correspondingly processing signals of different carriers, where X is an integer greater than 1, and Y is an integer greater than 1.
In a Time Division Duplex (TDD) system, uplink transmission and downlink transmission use the same frequency band, so to avoid crosstalk between uplink transmission and downlink transmission, it is necessary to ensure that data sent by downlink of a distributed base station is aligned at an air interface Time and data received by uplink is aligned at an air interface Time.
As shown in fig. 1, each baseband unit and non-baseband unit in the distributed base station are usually distributed in different physical locations, and distances from an air interface of the distributed base station to the air interface may be different, so that transmission delays may be different, and to achieve time alignment of the air interface, buffering processing needs to be performed on uplink received data or downlink transmitted data according to a delay adjustment amount.
The following describes a method for acquiring a delay adjustment amount of a distributed base station according to several specific embodiments.
In each embodiment of the present disclosure, the "previous stage" and the "next stage" are described in terms of a transmission distance relative to an air interface, for example, two adjacent baseband units are a baseband unit 11 and a baseband unit 12, respectively, where the baseband unit 11 is closer to the air interface than the baseband unit 12 is to the air interface, and the baseband unit 11 is described as a previous stage baseband unit of the baseband unit 12, and the baseband unit 12 is described as a next stage baseband unit of the baseband unit 11. For another example, the non-baseband unit 11 and the non-baseband unit 12, where the non-baseband unit 11 is farther away from the air interface than the non-baseband unit 12, it is described that the non-baseband unit 11 is a non-baseband unit of a next stage of the non-baseband unit 12, and the non-baseband unit 12 is a non-baseband unit of a previous stage of the baseband unit 11.
The downlink lead of all the baseband units of the same system are the same, the uplink lag of all the baseband units of the same system is the same, and the downlink lead and the uplink lag of the same system can be the same or different. For example, if the downlink advance of the system 1 is T1, the transmission delay from the baseband unit to the air interface of the data transmitted by all the baseband units of the system 1 is T1, so that it is ensured that the data transmitted in the downlink are aligned at the time of the air interface. For another example, if the uplink hysteresis of the standard 1 is T2, the transmission delay from the data transmission over the air interface to the data reception by all the baseband units of the standard 1 is T2, so that it is ensured that the data received in the uplink are aligned at the time of the air interface. The downlink lead amount of different systems is different, and the uplink lag amount of different systems is also different.
Fig. 2 is a schematic flow diagram of an embodiment of a method for obtaining a delay adjustment amount according to the present disclosure, where 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, aiming at each baseband unit, the baseband unit determines the time delay adjustment quantity of the baseband unit according to the time delay of the next-stage baseband unit and the time delay adjustment quantity of the next-stage baseband unit.
Wherein, the time delay with the next stage baseband unit comprises: a transmission delay of a transmission path between the baseband unit and the next-stage baseband unit and an uplink processing delay of the baseband unit; or, a transmission delay of a transmission path between the baseband unit and the next-stage baseband unit, and a downlink processing delay of the baseband unit.
Specifically, the baseband unit obtains a time delay with the next stage of baseband unit, and the baseband unit obtains the time delay adjustment amount of the baseband unit according to the time delay adjustment amount of the next stage of baseband unit plus the time delay with the next stage of baseband unit.
Alternatively, the baseband unit may obtain the time delay with the next stage baseband unit through, but not limited to, the following possible implementation manners, for example, the baseband unit may determine the time delay with the next stage baseband unit according to the round trip delay of the measurement signal by sending the measurement signal to the next stage baseband unit, where the transmission delay is a round trip delay of 1/2. The measurement signal may be, for example, Internet Packet explorer (PING) signaling.
Assuming that M is 5 and N is 5 in fig. 1, a baseband module of the distributed base station is as shown in fig. 3, a baseband unit group 1 corresponds to a system 1, a baseband unit group 2 corresponds to a system 2, a baseband unit group 3 corresponds to a system 3, a baseband unit group 4 corresponds to a system 4, and a baseband unit group 5 corresponds to a system 5. Taking the baseband unit group 1 as an example, all baseband units in the baseband unit group 1 process data of system 1, where the baseband unit group 1 includes a baseband unit 11, a baseband unit 12, a baseband unit 13, a baseband unit 14, and a baseband unit 15, a delay adjustment amount of the baseband unit 15 is T15, the baseband unit 14 obtains a delay T1 with 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 obtains the delay adjustment amount T14 of the baseband unit 14 according to the delay adjustment amount T15 of the baseband unit 15 plus a delay T1 with the baseband unit 15, where T14 is T15+ T1. Similarly, the baseband unit 14 sends the delay adjustment amount T14 to the baseband unit 13, the baseband unit 13 obtains a delay T2 with the baseband unit 14, the baseband unit 13 receives the delay adjustment amount T14 of the baseband unit 14 sent by the baseband unit 14, and the baseband unit 13 obtains a delay adjustment amount T13 with the baseband unit 14 according to the delay adjustment amount T14 of the baseband unit 14 plus a delay T2 with the baseband unit 14, where T13 is T14+ T2. The baseband unit 13 sends the delay adjustment amount T13 to the baseband unit 12, the baseband unit 12 obtains a delay T3 with the baseband unit 13, the baseband unit 12 receives the delay adjustment amount T13 of the baseband unit 13 sent by the baseband unit 13, and the baseband unit 12 adds a delay T3 with the baseband unit 13 according to the delay adjustment amount T13 of the baseband unit 13 to obtain a delay adjustment amount T12 of the baseband unit 12, where T12 is T13+ T3. The baseband unit 12 sends the delay adjustment amount T12 to the baseband unit 11, the baseband unit 11 obtains a delay T4 with the baseband unit 12, the baseband unit 11 receives the delay adjustment amount T12 of the baseband unit 12 sent by the baseband unit 12, and the baseband unit 11 obtains a delay adjustment amount T11 with the baseband unit 12 according to the delay adjustment amount T12 of the baseband unit 12 plus a delay T4 with the baseband unit 12, where T11 is T12+ T4. Similarly, the delay adjustment amount of each baseband unit can be obtained in the same manner for each baseband unit in each baseband unit group.
For ease of understanding, the present disclosure also provides a table to represent the delay adjustment amount of the same set of baseband units, as shown in fig. 1:
TABLE 1
The delay adjustment amounts of all baseband units in the baseband module can be obtained through the step of S201.
Optionally, in the above embodiment, the delay adjustment amount of the last stage baseband unit may be 0, or may be another value. If the delay adjustment value is set to be other value, when the last stage baseband unit is cascaded with the baseband unit, the delay adjustment value of the new last stage baseband unit can be obtained by subtracting the delay adjustment value of the new last stage baseband unit from the delay adjustment value of the original last stage baseband unit; for example, in the later period, the baseband unit 16 is cascaded after the baseband unit 15 according to the service requirement, as shown in fig. 4, the delay adjustment amount of the baseband unit 16 can be obtained by subtracting the delay between the baseband unit 16 and the delay adjustment amount of the baseband unit 15, and it is not necessary for all the baseband units to re-determine the delay adjustment amount, and further, the efficiency of obtaining the delay adjustment amount is improved.
S202: and for each reference baseband unit, the reference baseband unit determines the time delay adjustment data of the reference baseband unit according to the time delay adjustment data of the next-stage reference baseband unit and the time delay of the next-stage reference baseband unit.
The delay adjustment data of the reference baseband unit comprises the delay adjustment amount of the reference baseband unit and the delay adjustment amount of all reference baseband units behind the reference baseband unit at the reference baseband unit.
For example, referring to the example shown in fig. 3, the baseband unit 11, the baseband unit 21, the baseband unit 31, the baseband unit 41, and the baseband unit 51 are all reference baseband units, the baseband unit 11 corresponds to the standard 1, the baseband unit 21 corresponds to the standard 2, the baseband unit 31 corresponds to the standard 3, the baseband unit 41 corresponds to the standard 4, and the baseband unit 51 corresponds to the standard 5; the delay adjustment data of the baseband unit 51, that is, the delay adjustment amount of the reference baseband unit 51, the delay adjustment data of the baseband unit 41 includes: the amount of delay adjustment of the baseband unit 51 at the reference unit 41, and the amount of delay adjustment of the baseband unit 41; the delay adjustment data of the baseband unit 31 includes: the delay adjustment amounts of the baseband unit 41 and the baseband unit 51 at the baseband unit 31, and the delay adjustment amount of the baseband unit 51, respectively; the delay adjustment data of the baseband unit 21 includes: the delay adjustment amount of the baseband unit 31, the baseband unit 41, and the baseband unit 51 at the baseband unit 21, and the delay adjustment amount of the baseband unit 21, respectively; the delay adjustment data of the baseband unit 11 includes: the delay adjustment amount of baseband unit 21, baseband unit 31, baseband unit 41, and baseband unit 51 at baseband unit 11, and the delay adjustment amount of baseband unit 11.
The reference baseband unit obtains the time delay with the next stage of reference baseband unit. And the reference baseband unit adds the delay adjustment quantity in the delay adjustment data of the next-stage reference baseband unit to the delay of the next-stage reference baseband unit to obtain the delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit. And obtaining the time delay adjustment data of the reference baseband unit according to the time delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit and the time delay adjustment quantity of the reference baseband unit.
For example, in connection with the foregoing examples: the delay adjustment data of the baseband unit 51 includes a delay adjustment amount T51 of the baseband unit 51, where the delay adjustment amount T51 of the baseband unit 51 is obtained in S201. The baseband unit 51 sends the delay adjustment data to the baseband unit 41, the baseband unit 41 obtains a delay T54 between the baseband unit 51 and the baseband unit 41, and the baseband unit 41 adds a transmission delay T54 to T51 in the delay adjustment data of the baseband unit 51 to obtain a delay adjustment amount T514 of the baseband unit 51 at the baseband unit 41, where T514 is T51+ T54. Obtaining delay adjustment data of the baseband unit 41 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, where the delay adjustment data of the baseband unit 41 includes: t41 and T514. The baseband unit 41 sends the delay adjustment data thereof to the baseband unit 31, the baseband unit 31 obtains a delay T43 between itself and the baseband unit 41, the baseband unit 31 adds T43 to both T41 and T514 in the delay adjustment data of the baseband unit 41, and obtains a delay adjustment amount T513 of the baseband unit 51 at the baseband unit 31 and a delay adjustment amount T413 of the baseband unit 41 at the baseband unit 31, where T513 is T514+ T43, and T413 is T513+ T43; the delay adjustment data of the baseband unit 31 includes T31, T413, and T513. The baseband unit 31 sends the time delay adjustment data to the baseband unit 21, and the baseband unit 21 obtains a time delay t32 between itself and the baseband unit 31; the baseband unit 21 obtains a delay adjustment amount T512 of the baseband unit 51 at the baseband unit 21, a delay adjustment amount T412 of the baseband unit 41 at the baseband unit 21, and a delay adjustment amount T312 of the baseband unit 31 at the baseband unit 21 according to the transmission delay T32 and T31, T413, and T513 in the delay adjustment data of the baseband unit 31, where T512 is T513+ T32; t412 ═ T413+ T32; t312 ═ T313+ T32. The baseband unit 21 sends the time delay adjustment data to the baseband unit 11, and the baseband unit 11 obtains a time delay t21 between itself and the baseband unit 21; the baseband unit 11 obtains a delay adjustment amount T512 of the baseband unit 51 at the baseband unit 11, a delay adjustment amount T411 of the baseband unit 41 at the baseband unit 11, a delay adjustment amount T311 of the baseband unit 31 at the baseband unit 11, and a delay adjustment amount T211 of the baseband unit 21 at the baseband unit 11 according to the transmission delay T21 and T21, T312, T412, and T512 in the delay adjustment data of the baseband unit 21, where T511 is T512+ T21; t411 ═ T412+ T21; t311 ═ T312+ T21; t211 ═ T311+ T21. Wherein, T51, T41, T31, T21 and T11 can all be obtained by the step of S201.
The present disclosure also provides a table to represent the delay adjustment amount of the same set of baseband units, as shown in fig. 2:
TABLE 2
Through the step of S202, the baseband unit 11 may acquire the delay buffer amount of all systems at the baseband unit 11.
S203: and the target baseband unit sends the time delay adjustment data of the target baseband unit to the forwarding system module.
S204: and the forward transmission system module determines the time delay adjustment data of each non-baseband unit in the forward transmission system according to the time delay adjustment data of the target baseband unit.
And the target non-baseband unit in the fronthaul system module receives the time delay adjustment data sent by the target baseband unit, and updates the time delay adjustment data according to the time delay between the target non-baseband unit and the target baseband unit to obtain the time delay adjustment quantity of various systems at the target non-baseband unit.
The forwarding system module determines the delay adjustment data of each non-baseband unit in the forwarding system according to the delay adjustment data of the target baseband unit, including but not limited to the following possible implementation manners:
in a possible implementation manner, a target non-baseband unit obtains a delay adjustment amount of each system at the target non-baseband unit, and transfers the delay adjustment amount step by step according to a cascade relation of the non-baseband units, and in the transfer process, each time the target non-baseband unit passes through a unit of one stage of non-baseband, the delay adjustment amount of each target non-baseband unit is added to a delay between the target non-baseband unit and a next non-baseband unit, so as to obtain delay adjustment data of each system at each non-baseband unit.
In this embodiment, 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 of the next-stage baseband unit and the delay adjustment amount of the next-stage baseband unit, so that the baseband units are aligned step by step in one baseband unit group and finally aligned with the reference baseband unit in the baseband unit group that is closest to the fronthaul system module. And aiming at a reference baseband unit in each baseband unit group, determining the delay adjustment data of the reference baseband unit according to the delay adjustment data of a next-stage reference baseband unit and the delay of the next-stage reference baseband unit by the reference baseband unit, acquiring the delay adjustment quantity of the reference baseband unit of all systems in a target baseband unit by a target baseband unit closest to a forward transmission system module in the baseband module, sending the delay adjustment data of the target baseband unit to the forward transmission system module by the target baseband unit, and determining the delay adjustment data of each non-baseband unit in the forward transmission system by the forward transmission system module according to the delay adjustment data of the target baseband unit. Because each baseband unit in the baseband module determines the delay adjustment amount in a step-by-step alignment manner, the delay adjustment amount can be obtained only by communicating with the adjacent baseband unit, and therefore, the obtaining efficiency of the delay adjustment amount is improved.
In the above embodiment, in the process of determining the delay adjustment amount of the baseband unit or the non-baseband unit, the measurement of the delay and the transmission of the delay adjustment amount are only related to the adjacent network elements, so that the network elements can be flexibly expanded according to the service requirements of operators, and the delay adjustment amount of the existing network elements does not need to be recalculated.
Specifically, when a newly added baseband unit is needed, only the original last-stage baseband unit needs to be connected with the newly added baseband unit through an optical fiber, and the calculation and transmission of the time delay are only related to the adjacent baseband units, i.e., the time delay adjustment amount of the newly added baseband unit can be determined according to the time delay between the original last-stage baseband unit and the newly added baseband unit and the time delay adjustment amount of the original last-stage baseband unit. When a non-baseband unit needs to be newly added, the original last-stage non-baseband unit is connected with the newly added non-baseband unit through an optical fiber, the calculation and transmission of the time delay are only related to the adjacent non-baseband unit, namely the time delay adjustment data of the newly added non-baseband unit can be determined according to the time delay between the original last-stage non-baseband unit and the newly added non-baseband unit and the time delay adjustment data of the original last-stage non-baseband unit, and therefore the flexibility of the expansion of the distributed base station is improved.
Fig. 5 is a schematic flow diagram of another method for acquiring a delay adjustment amount according to an embodiment of the present disclosure, where fig. 5 is a description of a possible implementation manner of acquiring a delay adjustment amount by each non-baseband unit in a fronthaul system module based on the embodiment shown in fig. 2, as shown in fig. 5:
on the basis of the embodiment shown in fig. 2, one possible implementation manner of S203 is as follows:
s203', the target baseband unit sends the time delay adjustment data of the target baseband unit to the target non-baseband unit.
With reference to the foregoing example, the target baseband unit is the baseband unit 11, the target baseband unit sends the delay adjustment data of the target baseband unit to the forwarding system, and with reference to table 1, the baseband unit 11 obtains delay adjustment amounts of the baseband unit 51, the baseband unit 41, the baseband unit 31, and the baseband unit 21 at the baseband unit 11, that is, the baseband unit 11 obtains delay adjustment amounts of all systems at the baseband unit 11.
The target baseband unit sends the delay adjustment values of all systems at the baseband unit 11 to the target non-baseband unit 11 of the fronthaul system module.
One possible implementation of S204 in fig. 2 is shown as S2041 and S2042:
s2041: and the target non-baseband unit in the forward transmission system module determines the time delay adjustment data of the target non-baseband unit according to the time delay adjustment data of the target baseband unit and the time delay between the target non-baseband unit and the target baseband unit.
One implementation is as follows: the target non-baseband unit obtains the time delay with the target baseband unit, and the assumed time delay is t 0; and 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 non-baseband unit and the target baseband unit to obtain the delay adjustment data of the target baseband unit. In combination with the foregoing example, the delay adjustment data of the target baseband unit includes: t11, T211, T311, T411, and T511, assuming that the time delay between the target non-baseband unit and the target baseband unit is T0, the time delay adjustment data of the target non-baseband unit includes: t11+ T0, T211+ T0, T311+ T0, T411+ T0 and T511+ T0.
S2042: and aiming at each non-baseband unit in the fronthaul system module, the non-baseband unit determines delay adjustment data of the non-baseband unit according to the delay of the next non-baseband unit and the delay adjustment data of the next non-baseband unit, wherein the delay adjustment data comprises delay adjustment quantities corresponding to various systems respectively.
One implementation is as follows: and aiming at each non-baseband unit in the forward transmission system module, the non-baseband unit acquires the time delay with the next non-baseband unit, and adds all the time delay adjustment quantities in the time delay adjustment data of the next non-baseband unit to the time delay with the next non-baseband unit to obtain the time delay adjustment data of the non-baseband unit.
Wherein, the time delay with the next stage non-baseband unit comprises: a transmission delay of a transmission path between the non-baseband unit and the next-stage non-baseband unit and an uplink processing delay of the non-baseband unit; or, a transmission delay of a transmission path between the non-baseband unit and the next-stage non-baseband unit, and a downlink processing delay of the non-baseband unit.
In connection with 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; the non-baseband unit 11, the non-baseband unit 12, the non-baseband unit 13, the non-baseband unit 14, and the non-baseband unit 15 are sequentially connected by an optical fiber, where a time delay between the non-baseband unit 12 and the non-baseband unit 11 is t01, a time delay between the non-baseband unit 13 and the non-baseband unit 12 is t02, a time delay between the non-baseband unit 14 and the non-baseband unit 13 is t03, and a time delay between the non-baseband unit 15 and the non-baseband unit 14 is t 04; the 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.
The time delay adjustment data of each non-baseband unit can be obtained in the S2042 mode, and the time delay adjustment quantity of various systems at each non-baseband unit can be obtained.
In this embodiment, on the basis of the embodiment shown in fig. 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 forwarding system module, the non-baseband unit determines the delay adjustment data of the non-baseband unit according to the delay of the non-baseband unit of the next stage and the delay adjustment data of the non-baseband unit of the next stage, that is, the target non-baseband unit obtains the delay adjustment amount of each system at the target non-baseband unit, and transfers the delay adjustment amount step by step according to the cascade relationship of the non-baseband units, and in the transfer process, each unit passing through the non-baseband unit of the first stage adds the delay adjustment amount of each target non-baseband unit to the delay between the non-baseband unit of the next stage, so as to obtain the delay adjustment data of each system at each non-baseband unit. Because each non-baseband unit in the forward transmission system module determines the delay adjustment data in a step-by-step alignment mode, the delay adjustment data can be acquired only by communicating with the adjacent non-baseband unit, and therefore, the acquisition efficiency of the delay adjustment quantity is further improved.
In the above embodiment, the non-baseband unit included in the forwarding system module includes a non-baseband unit having a radio frequency module and a non-baseband unit without a radio frequency module, and the non-baseband unit having the radio frequency module stores the delay adjustment data, so that when there is data to be transmitted and received, the data is buffered according to the delay adjustment data.
The baseband unit in the baseband module needs to store its own delay buffer amount.
The distributed base station in the embodiment shown in fig. 1 corresponds to a technical solution that can be used to execute the above method embodiments, and the implementation principle and technical effect are similar, and are not described in detail here.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The method for acquiring the time delay adjustment quantity is characterized by being applied to a distributed base station, wherein the distributed base station comprises a baseband module and a forward transmission system module, and the baseband module comprises baseband unit groups corresponding to multiple systems respectively; each baseband unit group comprises a plurality of baseband units which are sequentially cascaded through optical fibers, the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and the reference baseband units are sequentially cascaded through the optical fibers; the target baseband unit is connected with the forward transmission system module through an optical fiber, and the target baseband unit is the baseband unit closest to the forward transmission system module;
the method comprises the following steps:
in the same baseband unit group, aiming at each baseband unit, the baseband unit determines the time delay adjustment quantity of the baseband unit according to the time delay of the next-stage baseband unit and the time delay adjustment quantity of the next-stage baseband unit;
for each reference baseband unit, the reference baseband unit determines delay adjustment data of the reference baseband unit according to delay adjustment data of a next-stage reference baseband unit and delay of the next-stage reference baseband unit, where the delay adjustment data of the reference baseband unit includes delay adjustment amounts of the reference baseband unit and delay adjustment amounts of all reference baseband units behind the reference baseband unit at the reference baseband unit;
the target baseband unit sends the time delay adjustment data of the target baseband unit to the forwarding system module;
and the forward transmission system module determines the time delay adjustment data of each non-baseband unit in the forward transmission system according to the time delay adjustment data of the target baseband unit.
2. The method of claim 1, wherein the fronthaul system module comprises a plurality of non-baseband units cascaded via optical fibers; the target baseband unit is connected with the target non-baseband unit through an optical fiber, and the target non-baseband unit is a non-baseband unit closest to the baseband module;
the target baseband unit sends the delay adjustment data of the target baseband unit to the forwarding system module, and the method includes:
the target baseband unit sends the time delay adjustment data of the target baseband unit to the target non-baseband unit;
the forwarding system module determines the delay adjustment data of each non-baseband unit in the forwarding system according to the delay adjustment data of the target baseband unit, and the method comprises the following steps:
the target non-baseband unit determines the time delay adjustment data of the target non-baseband unit according to the time delay adjustment data of the target baseband unit and the time delay between the target non-baseband unit and the target baseband unit;
and aiming at each non-baseband unit in the forward transmission system module, the non-baseband unit determines delay adjustment data of the non-baseband unit according to the delay of the next non-baseband unit and the delay adjustment data of the next non-baseband unit, wherein the delay adjustment data comprises delay adjustment amounts corresponding to a plurality of systems respectively.
3. The method of claim 1 or 2, wherein the determining, by the baseband unit, the delay adjustment amount of the baseband unit according to the delay of the next stage baseband unit and the delay adjustment amount of the next stage baseband unit comprises:
the baseband unit acquires the time delay with the next-stage baseband unit;
and the baseband unit obtains the delay adjustment quantity of the baseband unit according to the sum of the delay adjustment quantity of the next-stage baseband unit and the delay of the next-stage baseband unit.
4. The method according to claim 1 or 2, wherein the reference baseband unit determines the delay adjustment data of the reference baseband unit according to the delay adjustment data of the next stage reference baseband unit and the delay of the next stage reference baseband unit, and comprises:
the reference baseband unit acquires the time delay with the next-stage reference baseband unit;
the reference baseband unit adds the delay adjustment quantity in the delay adjustment data of the next-stage reference baseband unit to the delay of the next-stage reference baseband unit to obtain the delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit;
and obtaining the time delay adjustment data of the reference baseband unit according to the time delay adjustment quantity of all the reference baseband units behind the reference baseband unit at the reference baseband unit and the time delay adjustment quantity of the reference baseband unit.
5. The method of claim 2, wherein the determining, by the target non-baseband unit, the delay adjustment data for the target non-baseband unit based on the delay adjustment data and a delay with the target baseband unit comprises:
the target non-baseband unit acquires time delay between the target non-baseband unit and the target baseband unit;
and 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 non-baseband unit and the target baseband unit to obtain the delay adjustment data of the target non-baseband unit.
6. The method of claim 5, wherein the non-baseband unit determining the delay adjustment data of the non-baseband unit according to the delay of the non-baseband unit of the next stage and the delay adjustment data of the non-baseband unit of the next stage comprises:
the non-baseband unit acquires the time delay with the next-stage non-baseband unit;
and the non-baseband unit adds all the time delay adjustment quantities in the time delay adjustment data of the next-stage non-baseband unit to the time delay of the next-stage non-baseband unit to obtain the time delay adjustment data of the non-baseband unit.
7. The method of claim 2, further comprising:
the baseband unit stores the time 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 is characterized by comprising a baseband module and a forward transmission system module, wherein the baseband module comprises baseband unit groups corresponding to a plurality of systems respectively; each baseband unit group comprises a plurality of baseband units which are sequentially cascaded through optical fibers, the baseband unit closest to the fronthaul system in each baseband unit group is a reference baseband unit, and the reference baseband units are sequentially cascaded through the optical fibers; the target baseband unit is connected with the forward transmission system module through an optical fiber, and the target baseband unit is the baseband unit closest to the forward transmission system module; the forwarding system module comprises a plurality of non-baseband units which are cascaded through optical fibers; the target baseband unit is connected with the target non-baseband unit through an optical fiber, the target baseband unit is the baseband unit closest to the forward transmission system module, and the target non-baseband unit is the non-baseband unit closest to the baseband module; wherein the baseband unit, the reference baseband unit and the target baseband unit are configured to perform the method of any one of claims 1-7.
9. The distributed base station of claim 8, wherein the fronthaul system module comprises a plurality of non-baseband units cascaded via optical fiber; the target baseband unit and the target non-baseband unit are connected through 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.
10. The distributed base station of claim 9, wherein different baseband units in the same baseband unit group are configured to process signals of different carriers.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098328A (en) * | 2007-06-29 | 2008-01-02 | 中兴通讯股份有限公司 | Base band and RF system synchronization and time delay compensation process |
| CN101170357A (en) * | 2007-11-22 | 2008-04-30 | 中兴通讯股份有限公司 | An uplink data transmission method for cascaded RF remote unit |
| CN101471724A (en) * | 2007-12-28 | 2009-07-01 | 鼎桥通信技术有限公司 | Ascending data synchronization method for TDD system |
| CN101707498A (en) * | 2009-10-20 | 2010-05-12 | 武汉虹信通信技术有限责任公司 | Device and method for realizing TD-SCDMA RRU multi-stage cascade function |
| CN102082608A (en) * | 2010-12-27 | 2011-06-01 | 武汉邮电科学研究院 | Method and device for adjusting time delay of RRU (remote radio unit) cascaded fiber |
| CN102325366A (en) * | 2011-05-24 | 2012-01-18 | 大唐移动通信设备有限公司 | Data synchronization method, system and device |
| CN103209025A (en) * | 2013-02-22 | 2013-07-17 | 中国电力科学研究院 | Electric light load wireless communication system based on distributed base station pools and implementation method for wireless communication system |
| CN103581088A (en) * | 2012-07-19 | 2014-02-12 | 中兴通讯股份有限公司 | Time delay processing method and time delay processing device |
| WO2014161359A1 (en) * | 2013-08-22 | 2014-10-09 | 中兴通讯股份有限公司 | Distributed base station networking method and apparatus, and computer readable storage medium |
| US20180310269A1 (en) * | 2017-04-20 | 2018-10-25 | Huawei Technologies Co., Ltd. | Remote radio head equipped with user equipment terminal capability |
-
2020
- 2020-12-31 CN CN202011623732.8A patent/CN112867133B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098328A (en) * | 2007-06-29 | 2008-01-02 | 中兴通讯股份有限公司 | Base band and RF system synchronization and time delay compensation process |
| CN101170357A (en) * | 2007-11-22 | 2008-04-30 | 中兴通讯股份有限公司 | An uplink data transmission method for cascaded RF remote unit |
| CN101471724A (en) * | 2007-12-28 | 2009-07-01 | 鼎桥通信技术有限公司 | Ascending data synchronization method for TDD system |
| CN101707498A (en) * | 2009-10-20 | 2010-05-12 | 武汉虹信通信技术有限责任公司 | Device and method for realizing TD-SCDMA RRU multi-stage cascade function |
| CN102082608A (en) * | 2010-12-27 | 2011-06-01 | 武汉邮电科学研究院 | Method and device for adjusting time delay of RRU (remote radio unit) cascaded fiber |
| CN102325366A (en) * | 2011-05-24 | 2012-01-18 | 大唐移动通信设备有限公司 | Data synchronization method, system and device |
| CN103581088A (en) * | 2012-07-19 | 2014-02-12 | 中兴通讯股份有限公司 | Time delay processing method and time delay processing device |
| CN103209025A (en) * | 2013-02-22 | 2013-07-17 | 中国电力科学研究院 | Electric light load wireless communication system based on distributed base station pools and implementation method for wireless communication system |
| WO2014161359A1 (en) * | 2013-08-22 | 2014-10-09 | 中兴通讯股份有限公司 | Distributed base station networking method and apparatus, and computer readable storage medium |
| US20180310269A1 (en) * | 2017-04-20 | 2018-10-25 | Huawei Technologies Co., Ltd. | Remote radio head equipped with user equipment terminal capability |
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|---|---|
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