CN111162863B - Access network device and data processing method - Google Patents
Access network device and data processing method Download PDFInfo
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- CN111162863B CN111162863B CN201911418395.6A CN201911418395A CN111162863B CN 111162863 B CN111162863 B CN 111162863B CN 201911418395 A CN201911418395 A CN 201911418395A CN 111162863 B CN111162863 B CN 111162863B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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Abstract
The application relates to an access network device and a data processing method. The access network device includes: the core network device comprises a main near-end unit, an external clock source, at least one slave near-end unit, at least one first far-end unit and at least one second far-end unit, wherein the main near-end unit is used for forwarding downlink service data sent by the core network device to the at least one slave near-end unit and the at least one first far-end unit after clock synchronization is carried out by adopting a synchronous clock signal sent by the external clock source; the slave near-end unit is used for acquiring the clock of the master near-end unit from the master near-end unit, performing clock synchronization through the clock of the master near-end unit, and forwarding the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit after the clock synchronization; the first far-end unit is used for receiving downlink service data sent by the main near-end unit; and the second remote unit is used for receiving the downlink service data sent from the near-end unit. The hardware cost of building the station can be reduced by adopting the equipment.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an access network device and a data processing method.
Background
With the continuous development of communication technology, more and more cells need to cover a wireless network, which requires more base stations to be deployed to meet the network coverage requirement of multiple cells.
In the related art, when a cell in which a Base station needs to be deployed is newly added, a new clock source device, a baseband processing unit BBU (building Base band unit) and a radio Remote unit rru (radio Remote unit) are generally combined to obtain a new Base station system, and the BBU in the new Base station system is connected to a core network through an ethernet switch, so as to finally implement network coverage on the newly added cell.
However, when the above technology is used for deploying a new base station, the hardware cost for opening the station is high.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an access network device and a data processing method that can reduce hardware cost.
An access network device, comprising: the system comprises a master near-end unit, an external clock source, at least one slave near-end unit, at least one first far-end unit and at least one second far-end unit, wherein the master near-end unit is connected with the external clock source, the at least one slave near-end unit is cascaded, the master near-end unit is cascaded with the at least one first far-end unit, and the slave near-end unit is cascaded with the at least one second far-end unit;
the master near-end unit is used for forwarding downlink service data issued by the core network equipment to the at least one slave near-end unit and the at least one first far-end unit after performing clock synchronization by adopting a synchronous clock signal sent by an external clock source;
the slave near-end unit is used for acquiring the clock of the master near-end unit from the master near-end unit, performing clock synchronization through the clock of the master near-end unit, and forwarding the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit after the clock synchronization;
the first remote unit is used for receiving the downlink service data sent by the main near-end unit;
and the second far-end unit is used for receiving the downlink service data sent from the near-end unit.
In one embodiment, the master near-end unit includes a first phase-locking module, a first air interface alignment module, and a first ethernet switching module, where the first phase-locking module and the first air interface alignment module are respectively connected to an external clock source, and the first ethernet switching module is connected to the slave near-end unit;
the first phase-locked module is used for receiving a synchronous clock signal sent by an external clock source and carrying out clock calibration processing on a local crystal oscillator of the master near-end unit by using the synchronous clock signal to obtain a calibrated clock;
the first air interface alignment module is used for receiving a synchronous clock signal sent by an external clock source and carrying out air interface synchronization on the master near-end unit by adopting the synchronous clock signal;
the first ethernet switching module is configured to forward the downlink service data sent by the core network device to the slave near-end unit and the first far-end unit.
In one embodiment, the master near-end unit further includes a first upper networking port and a first lower networking port, the first upper networking port is connected to the core network device, and the first lower networking port is connected to the slave near-end unit;
downlink service data issued by the core network equipment is sent to the first Ethernet switching module through the first upper networking port;
the first Ethernet switching module forwards the downlink service data to the slave near-end unit through the first downlink port.
In one embodiment, the first ethernet switching module is further configured to send the first configuration parameter and the second configuration parameter to the slave unit and send the third configuration parameter to the first remote unit;
the first configuration parameter comprises a calibrated clock and a synchronous clock signal sent to the slave near-end unit by the master near-end unit, the second configuration parameter comprises frequency point information of the second far-end unit, and the third configuration parameter comprises frequency point information of the first far-end unit.
In one embodiment, the master near-end unit further includes a first downlink optical port and a first local optical port, the first downlink optical port is respectively connected to the first air interface alignment module and the first ethernet switching module, and the first local optical port is connected to the first ethernet switching module;
the first Ethernet exchange module sends the first configuration parameter and the second configuration parameter to the slave near-end unit through the first lower optical interface;
and the first Ethernet exchange module sends the third configuration parameter to the first remote unit through the first local optical port.
In one embodiment, the slave near-end unit includes a second phase-locking module, a second air interface alignment module, and a second ethernet switching module, and the second ethernet switching module and the first ethernet switching module are connected through a first lower networking port;
the second phase-locking module is used for carrying out clock calibration on the slave near-end unit by adopting the calibrated clock;
the second air interface alignment module is used for carrying out air interface synchronization on the slave near-end unit by adopting a synchronous clock signal sent to the slave near-end unit by the master near-end unit;
and the second Ethernet switching module is used for forwarding the downlink service data sent by the first Ethernet switching module to the cascaded subordinate slave near-end unit and the second far-end unit.
In one embodiment, the first configuration parameters include a first configuration parameter of the slave near-end unit and a first configuration parameter of the slave near-end unit of the lower level of the cascade;
the second ethernet switching module is further configured to forward the first configuration parameters of the cascaded subordinate slave near-end unit to the cascaded subordinate slave near-end unit, and to send the second configuration parameters to the second remote unit.
In one embodiment, the slave near-end unit further includes a clock recovery module and an air interface recovery module, where the clock recovery module is connected to the second phase-locking module, and the air interface recovery module is connected to the second air interface alignment module;
the clock recovery module is used for analyzing the first configuration parameters of the near-end unit to obtain a calibrated clock and sending the analyzed calibrated clock to the second phase-locking module;
and the air interface recovery module is used for analyzing the first configuration parameters of the slave near-end unit to obtain a synchronous clock signal sent by the master near-end unit to the slave near-end unit, and sending the synchronous clock signal obtained by analysis to the second air interface alignment module.
In one embodiment, the slave near-end unit further includes a second upper optical port, a second lower optical port, and a second local optical port, where the second upper optical port is connected to the first lower optical port, the second local optical port is connected to the second ethernet switching module, and the second upper optical port is connected to the clock recovery module and the air interface recovery module, respectively;
the first Ethernet exchange module sends the first configuration parameters of the near-end unit to a clock recovery module and an air interface recovery module through a first lower optical connection port and a second upper optical connection port;
the second Ethernet switching module sends the first configuration parameter of the cascaded subordinate slave near-end unit to the cascaded subordinate slave near-end unit through a second downlink optical port;
and the second Ethernet switching module sends the second configuration parameter to the second remote unit through the second local optical port.
In one embodiment, the slave near-end unit further includes a second upper networking port and a second lower networking port, and the second upper networking port is connected with the first lower networking port;
downlink service data sent by the first Ethernet exchange module is sent to a second Ethernet interaction module through a second uplink network port;
and the second Ethernet interaction module forwards the downlink service data to the cascaded subordinate slave near-end unit through the second downlink network port.
In one of the embodiments, the first and second electrodes are,
the first remote unit is further configured to send the received uplink service data of the first user equipment to the master near-end unit;
the second remote unit is further configured to send the received uplink service data of the second user equipment to the slave near-end unit;
the slave near-end unit is further configured to forward the received combined uplink service data to the master near-end unit; the combined uplink service data comprises uplink service data of the second user equipment and uplink service data sent by a cascaded subordinate slave near-end unit;
the master near-end unit is further configured to forward the combined uplink service data and the uplink service data of the first user equipment to the core network device.
A method of data processing, the method comprising:
the method comprises the steps that after clock synchronization is carried out on a synchronous clock signal sent by an external clock source, a master near-end unit forwards downlink service data issued by core network equipment to at least one slave near-end unit and at least one first far-end unit;
the slave near-end unit acquires the clock of the master near-end unit from the master near-end unit, performs clock synchronization through the clock of the master near-end unit, and forwards the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit after the clock synchronization;
a first remote unit receives downlink service data sent by a main near-end unit;
the second remote unit receives the downlink traffic data transmitted from the near-end unit.
The access network equipment comprises a master near-end unit, an external clock source, at least one slave near-end unit, at least one first far-end unit and at least one second far-end unit, wherein the master near-end unit is connected with the external clock source and at least one slave near-end unit is cascaded, the master near-end unit is cascaded with the first far-end unit, the slave near-end unit is cascaded with the second far-end unit, after the master near-end unit performs clock synchronization by adopting a synchronous clock signal sent by the external clock source, forwarding the downlink service data issued by the core network device to the slave near-end unit and the first far-end unit, acquiring the clock of the master near-end unit from the master near-end unit by the slave near-end unit, performing clock synchronization by the clock of the master near-end unit, and forwarding the downlink service data to the cascaded subordinate slave near-end unit and the second far-end unit after the clock synchronization. In the access network equipment, because only an external clock source is needed to be externally connected to the master near-end unit, the clock synchronization of the master near-end unit can be realized, and other slave near-end units can utilize the clock of the master near-end unit to carry out clock synchronization, therefore, the access network equipment does not need to externally connect an external clock source to each near-end unit, so that the clock synchronization of the master near-end unit and the slave near-end units can be realized through one external clock source, therefore, the access network equipment is adopted to carry out merging and networking, a lot of clock source equipment can be saved, the hardware cost of building a station can be reduced, in addition, the access network equipment is adopted, and when the access network equipment is maintained at a later stage, the labor cost of maintenance can also be reduced.
Drawings
Fig. 1 is a schematic structural diagram of networking of access network devices in the prior art;
FIG. 2 is a diagram illustrating a networking architecture of access network devices in an embodiment;
fig. 3 is a schematic structural diagram of a master near-end unit in the access network device according to an embodiment;
fig. 4 is a schematic structural diagram of a slave unit in the access network device according to an embodiment;
FIG. 5 is a schematic illustration of calculating a location of an air port from a proximal unit in one embodiment;
FIG. 6 is a flowchart illustrating a data processing method according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Fig. 1 is a schematic structural diagram of a conventional cell merging in the related art, that is, a schematic diagram of an access network networking in the prior art, in fig. 1, taking three cells as an example, when network coverage of each cell is implemented, each cell corresponds to a set of base station system, each set of base station system includes a remote unit, a near-end unit, and a set of external clock source device (for example, GPS device in fig. 1), the three sets of base station systems include three sets of clock source devices, the three sets of base station systems simultaneously implement communication with a core network through an ethernet switch, which are independent and do not affect each other, and are equivalent to replication of a single cell, when a new cell requiring deployment of a base station is added, a new clock source device is generally combined with the near-end unit and the remote-end unit to obtain a new set of base station system, and the near-end unit in the new base station system is connected to the core network through the ethernet switch, finally, network coverage of the newly-added cell is realized, and therefore, in the technology, when a new base station is deployed, one network port of an exchanger is occupied and one set of clock source equipment is added every time one cell is added, and more than two cells in a single station group are equivalent to the requirement of adding one exchanger. The embodiment of the application provides access network equipment and a data processing method, and aims to solve the technical problems.
It should be noted that the modules or units in the embodiments of the present application may be implemented in the form of hardware entities such as hardware circuits and/or chips.
In an embodiment, as shown in fig. 2, an access network device is provided to illustrate a downlink procedure from a network side to a user equipment side, and the access network device may include:
a master near-end unit 11, an external clock source 10, at least one slave near-end unit 12, at least one first far-end unit 13, at least one second far-end unit 14, wherein the master near-end unit 11 is connected with the external clock source 10, the at least one slave near-end unit 12 is cascaded, the master near-end unit 11 is cascaded with the at least one first far-end unit 13, and the slave near-end unit 12 is cascaded with the at least one second far-end unit 14;
the master near-end unit 11 is configured to forward downlink service data sent by the core network device to at least one slave near-end unit and at least one first far-end unit after performing clock synchronization by using a synchronization clock signal sent by the external clock source 10;
a slave near-end unit 12, configured to obtain a clock of the master near-end unit from the master near-end unit 11, perform clock synchronization through the clock of the master near-end unit, and forward the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit 14 after clock synchronization;
a first remote unit 13, configured to receive downlink service data sent by the master near-end unit 11; and a second remote unit 14, configured to receive the downlink traffic data transmitted from the near-end unit 12.
Referring to fig. 2, in the access network device, first, a master near-end unit and a slave near-end unit and a cascaded slave near-end unit are all near-end units, but are divided into a master device and a slave device, a first far-end unit and a second far-end unit are all far-end units, but are connected with different near-end units, where the near-end units and the far-end units are supporting base station systems, the near-end units may be BBUs, near-end machines, etc., and the far-end units may be RRUs, far-end machines, etc.
Secondly, the master proximal unit 11 may be connected to only one slave proximal unit 12, or only one first distal unit 13, or may be connected to a plurality of slave proximal units and a plurality of first distal units, when a plurality of slave proximal units and a plurality of first distal units are connected, the master proximal unit 11 is connected to one slave proximal unit 12, and the slave proximal units 12 may be connected to the slave proximal units of the next level in a daisy chain structure, i.e. in a cascade manner, and so on, until being connected to the slave proximal unit of the last level; similarly, the main proximal unit 11 may be connected to a first distal unit 13, and the first distal unit 13 may also be connected to a next first distal unit in a daisy-chain connection manner, i.e. in a cascade manner, and so on, until being connected to a last first distal unit; of course, when the connection is made between the proximal unit 12 and each second distal unit 14, it is also possible to connect one second distal unit 14 from the proximal unit 12, and the second distal unit 14 may be connected to the next second distal unit in a daisy chain structure, i.e. in a cascade manner, and so on, until it is connected to the last second distal unit. Additionally, the external clock source 10 may be GPS, RGPS, 1588, or the like.
Specifically, after the access network device is powered on, the master near-end unit 11 may obtain a synchronous clock signal sent by the external clock source 10, where the synchronous clock signal may be a PPS reference signal (Pulse Per Second, or the like), and then the master near-end unit may perform clock synchronization on the master near-end unit using the synchronous clock signal, and after the clock synchronization, the synchronous clock signal may be stored or locked, and then the synchronous clock signal is sent to the first-stage slave near-end unit 12 connected to the master near-end unit 11, and the slave near-end unit 12 may perform clock synchronization on itself using the synchronous clock signal, and at the same time, may send the clock synchronization signal to a lower-stage slave near-end unit cascaded thereto, and the cascaded lower-stage slave near-end unit may also perform clock synchronization on itself using the synchronous clock signal, and may also retransmit the received synchronous clock signal to a lower-stage slave near-end unit, and so on, completing the clock synchronization of all the slave near-end units. When the master near-end unit 11 performs clock synchronization on the slave near-end units 12, the master near-end unit 11 may also send configuration parameters to each first remote-end unit 13 and each second remote-end unit 14, and when sending the configuration parameters to each second remote-end unit 14, the configuration parameters may be sent to each slave near-end unit 12, and then forwarded to each corresponding second remote-end unit 14 by each slave near-end unit, where the configuration parameters may be parameter information such as frequency points and carriers of the remote-end units.
After the master near-end unit 11 configures each slave near-end unit 12 and each first far-end unit 13 and each second far-end unit 14, the user equipment in the coverage area of each first far-end unit 13 and each second far-end unit 14 can access to the corresponding far-end unit, and then perform service data transceiving, when performing service data transceiving, the core network device may send down service data first, the downlink service data is received by the master near-end unit first, the master near-end unit 11 may take out the downlink service data of this level to process, and send the processed data to the corresponding first far-end unit 13, and the first far-end unit 13 may distribute the data to the corresponding user equipment in the coverage area after receiving the downlink service data. Meanwhile, the master near-end unit 11 may also forward the downlink service data belonging to the slave near-end unit 12 to the first slave near-end unit 12, the slave near-end unit 12 may take out the downlink service data of this level for processing, and send the processed data to the corresponding second far-end unit 14, after receiving the downlink service data, the second far-end unit 14 may distribute the data to the corresponding user equipment within its coverage range, and similarly, the slave near-end unit may also forward the downlink service data belonging to other cascaded slave near-end units to the subordinate slave near-end unit, and so on until the downlink service data is completely distributed.
The access network device provided by this embodiment includes a master near-end unit, an external clock source, at least one slave near-end unit, at least one first far-end unit, and at least one second far-end unit, where the master near-end unit is connected to the external clock source and at least one slave near-end unit is cascaded, the master near-end unit is cascaded with the first far-end unit, the slave near-end unit is cascaded with the second far-end unit, after performing clock synchronization by using a synchronization clock signal sent by the external clock source, forwarding the downlink service data issued by the core network device to the slave near-end unit and the first far-end unit, acquiring the clock of the master near-end unit from the master near-end unit by the slave near-end unit, performing clock synchronization by the clock of the master near-end unit, and forwarding the downlink service data to the cascaded subordinate slave near-end unit and the second far-end unit after the clock synchronization. In the access network equipment, because only an external clock source is needed to be externally connected to the master near-end unit, the clock synchronization of the master near-end unit can be realized, and other slave near-end units can utilize the clock of the master near-end unit to carry out clock synchronization, therefore, the access network equipment does not need to externally connect an external clock source to each near-end unit, so that the clock synchronization of the master near-end unit and the slave near-end units can be realized through one external clock source, therefore, the access network equipment is adopted to carry out merging and networking, a lot of clock source equipment can be saved, the hardware cost of building a station can be reduced, in addition, the access network equipment is adopted, and when the access network equipment is maintained at a later stage, the labor cost of maintenance can also be reduced.
In another embodiment, as shown in fig. 3, there is provided an access network device, and the main near-end unit 11 of the access network device may include:
a first phase-locked module 110, a first air interface alignment module 111, and a first ethernet switching module 112, where the first phase-locked module 110 and the first air interface alignment module 111 are respectively connected to an external clock source 10, and the first ethernet switching module 112 is connected to the slave near-end unit 12; the first phase-locked module 110 is configured to receive a synchronous clock signal sent by an external clock source 10, and perform clock calibration processing on a local crystal oscillator of a master near-end unit by using the synchronous clock signal to obtain a calibrated clock; a first air interface alignment module 111, configured to receive a synchronous clock signal sent by an external clock source 10, and perform air interface synchronization on a master near-end unit by using the synchronous clock signal; the first ethernet switching module 112 is configured to forward the downlink service data sent by the core network device to the slave unit 12 and the first remote unit 13.
The first Phase-Locked module 110 may be referred to as a PLL (Phase Locked Loop) module.
Specifically, the master near-end unit may obtain a synchronous clock signal sent by the external clock source 10, where the synchronous clock signal may be a PPS reference signal, and perform clock calibration on a local crystal oscillator inside the master near-end unit 11 by using the synchronous clock signal to obtain a calibrated clock, provide a working master clock for the master near-end unit 11, and lock the master clock; the master near-end unit 11 may simultaneously perform air interface synchronization or air interface alignment by using the synchronous clock signal, and store the synchronous clock signal, and then the master near-end unit 11 may send the stored master clock and synchronous clock signal to the first slave near-end unit 12 and the first ethernet switching module 112 in the cascade.
In addition, the master near-end unit 11 may further include a local baseband processing module 113 and a local monitoring processing module 114, and when receiving downlink service data sent by the core network device, the master near-end unit may receive, through the first ethernet switching module 112 of the master near-end unit, the downlink service data may include downlink service data of the master near-end unit itself, and may also include downlink service data of cascaded slave near-end units, and the first ethernet switching module 112 may send the downlink service data of the master near-end unit itself to the local baseband processing module 113 for processing, and send the processed downlink service data to the first far-end unit 13 through the first ethernet switching module 112; meanwhile, the first ethernet switching module 112 may also directly forward the downlink traffic data of the cascaded slave near-end units to the slave near-end unit 12 connected to the master near-end unit 11. Certainly, the master near-end unit 11 may also send configuration parameters to the first far-end unit 13 in cascade connection and each slave near-end unit in cascade connection, where the configuration parameters may be configured uniformly by the local monitoring processing module 114 in the master near-end unit 11, and then send the configured configuration parameters to the first ethernet switching module 112, and then the configuration parameters are forwarded to the corresponding first far-end unit 13 and each slave near-end unit by the first ethernet switching module 112.
In the access network device provided in this embodiment, the master near-end unit of the access network device may include a first phase-locking module, a first air interface alignment module, and a first ethernet switching module, where the first phase-locking module and the first air interface alignment module are respectively connected to an external clock source, the first ethernet switching module is connected to the slave near-end unit, the first phase-locking module and the first air interface alignment module may implement clock synchronization on the master near-end unit through a synchronous clock signal of the external clock source, and the first ethernet switching module may forward downlink service data, which is sent to the first far-end unit and each slave near-end unit by the core network device, to the corresponding first far-end unit and each slave near-end unit. In the main near-end unit of the access network device, the first ethernet switching module can forward data, so that the function of a switch in the prior art can be realized, the switch in the prior art is replaced, and no switch is required to be additionally added outside the access network device, therefore, the access network device of the embodiment can save the switch device, so that the hardware cost for building a station can be further reduced, and in addition, when the access network device is maintained in the later period, the labor cost for maintenance can be further reduced. Furthermore, because the data of other slave near-end units are forwarded from the master near-end unit in the access network device, by adopting the access network device, other cascaded slave near-end units can be uniformly managed on the master near-end unit, so that the problem of frequent switching when multiple near-end units are managed can be avoided, the management efficiency is further improved, and the time cost for maintaining the access network device is reduced.
In another embodiment, an access network device is provided, and with continued reference to fig. 3, the main near-end unit 11 of the access network device may further include: a first upper networking port 115 and a first lower networking port 116, the first upper networking port 115 is connected with the core network device, and the first lower networking port 116 is connected with the slave near-end unit 12;
downlink service data sent by the core network device is sent to the first ethernet switching module 112 through the first uplink port 115; the first ethernet switching module 112 forwards the downstream traffic data to the slave near-end unit 12 via the first downstream port 116.
Optionally, the first ethernet switching module 112 is further configured to send the first configuration parameter and the second configuration parameter to the slave near-end unit, and send the third configuration parameter to the first far-end unit; the first configuration parameter comprises a calibrated clock and a synchronous clock signal sent to the slave near-end unit by the master near-end unit, the second configuration parameter comprises frequency point information of the second far-end unit, and the third configuration parameter comprises frequency point information of the first far-end unit.
Optionally, the main near-end unit 11 further includes a first downlink optical port 117 and a first local optical port 118, where the first downlink optical port 117 is connected to the first air interface alignment module 111 and the first ethernet switching module 112 respectively, and the first local optical port 118 is connected to the first ethernet switching module 112; the first ethernet switching module 112 sends the first configuration parameter and the second configuration parameter to the slave-end unit 12 through the first downstream optical port 117; the first ethernet switching module 112 sends the third configuration parameter to the first remote unit 13 via the first local optical port 118.
The connection between the first upper networking port 115 and the core network device, and the connection between the first lower networking port 116 and the slave proximal end unit 12 may be made by using network cables, the connection between the first lower networking port 117 and the first air interface alignment module 111 and the first ethernet switching module 112, and the connection between the first local optical port 118 and the first ethernet switching module 112, may be made by using optical cables or optical fibers.
In addition, the first configuration parameter may include a configuration parameter sent by the master near-end unit to all the slave near-end units, for example, the first configuration parameter of the first slave near-end unit and the first configuration parameter of the cascaded slave near-end units, and the configuration parameter sent to each slave near-end unit may include a calibrated clock and a synchronized clock signal for clock synchronization of the slave near-end units, and may of course include other configuration parameters. The second configuration parameter may also be a configuration parameter of a second remote unit corresponding to each slave near-end unit, for example, a frequency point, a carrier, and the like of each second remote unit. The third configuration parameters may be configuration parameters of each first remote unit, and are sent to the first remote unit cascaded with the master near-end unit through the first ethernet switching module, and then passed through by the first remote unit in a stage. Of course, the main proximal unit 11 may also include an uplink optical port, but the uplink optical port of the main proximal unit is bypassed when the main proximal unit and the core network device perform communication interaction.
In the access network device provided in this embodiment, the master near-end unit of the access network device may further include a first upper network port and a first lower network port, where the first upper network port is connected to the core network device, and the first lower network port is connected to the slave near-end unit, downlink service data sent by the core network device is sent to the first ethernet switching module through the first upper network port, and the first ethernet switching module forwards the downlink service data to the slave near-end unit through the first lower network port. In the access network device, because the downlink service data can be sent to the master near-end unit through the network port between the core network device and the master near-end unit, and meanwhile, the master near-end unit can forward the downlink service data belonging to the slave near-end unit through the network port between the master near-end unit and the slave near-end unit, it can be seen that in the access network device, the data of other slave near-end units are forwarded from the master near-end unit, therefore, by adopting the access network device, other cascaded slave near-end units can be uniformly managed on the master near-end unit, so that the problem of frequent switching when multiple near-end units are managed can be avoided, the management efficiency is further improved, and the time cost for maintaining the access network device is reduced.
In another embodiment, as shown in fig. 4, there is provided an access network device, the slave near-end unit 12 of which may include:
the second phase locking module 120, the second air interface alignment module 121, and the second ethernet switching module 122, where the second ethernet switching module 122 and the first ethernet switching module 112 are connected through the first lower networking port 116;
a second phase-locking module 120, configured to perform clock calibration on the slave unit using the calibrated clock;
a second air interface alignment module 121, configured to perform air interface synchronization on the slave near-end unit by using the synchronization clock signal sent by the master near-end unit 11 to the slave near-end unit;
and a second ethernet switching module 122, configured to forward the downlink traffic data sent by the first ethernet switching module 112 to the cascaded subordinate slave near-end unit and the second far-end unit 14.
Optionally, the first configuration parameter includes a first configuration parameter of the slave near-end unit and a first configuration parameter of the slave near-end unit in a cascade lower stage; the second ethernet switching module 122 is further configured to forward the first configuration parameters of the cascaded subordinate slave near-end unit to the cascaded subordinate slave near-end unit, and to send the second configuration parameters to the second remote unit 14.
Optionally, the slave near-end unit 12 further includes a clock recovery module 123 and an air interface recovery module 124, where the clock recovery module 123 is connected to the second phase-locking module 120, and the air interface recovery module 124 is connected to the second air interface aligning module 121; a clock recovery module 123, configured to analyze the first configuration parameter of the near-end unit to obtain a calibrated clock, and send the calibrated clock obtained through analysis to the second phase-locking module 120; the air interface recovery module 124 is configured to obtain, through parsing of the first configuration parameter of the slave proximal unit, a synchronous clock signal sent by the master proximal unit to the slave proximal unit, and send the obtained, through parsing, the synchronous clock signal to the second air interface alignment module 121.
Optionally, the slave near-end unit 12 further includes a second uplink optical port 125, a second downlink optical port 126, and a second local optical port 127, where the second uplink optical port 125 is connected to the first downlink optical port 117, the second local optical port 127 is connected to the second ethernet switching module 122, and the second uplink optical port 125 is respectively connected to the clock recovery module 123 and the air interface recovery module 124; the first ethernet switching module 112 sends the first configuration parameters from the near-end unit to the clock recovery module 123 and the air interface recovery module 124 through the first lower optical port 117 and the second upper optical port 125; the second ethernet switching module 122 sends the first configuration parameter of the subordinate slave-to-master unit of the cascade to the subordinate slave-to-master unit of the cascade through the second downlink optical port 126; the second ethernet switching module 122 sends the second configuration parameters to the second remote unit 14 via the second local optical port 127.
Optionally, the slave proximal end unit 12 further includes a second upper networking port 128 and a second lower networking port 129, and the second upper networking port 128 is connected to the first lower networking port 116; the downlink service data sent by the first ethernet switching module 112 is sent to the second ethernet interaction module 122 through the second uplink port 128; the second ethernet interworking module 122 forwards the downstream traffic data to the cascaded subordinate slave near-end unit through the second downstream port 129.
In this embodiment, the configuration parameters sent by the master proximal unit 11 to each slave proximal unit are first entered into the first ethernet switching module 112, then enters the slave proximal end unit 12 through the first lower light coupling port 117 and the second upper light coupling port 125, wherein the configuration parameters from the near end unit 12 enter the clock recovery module 123 and the air interface recovery module 124 through the second uplink optical port 125, the master clock (i.e., the calibrated clock) and the synchronized clock signal of the master near-end unit 11 can be recovered by the clock recovery module 123, the clock recovery module 123 can clock-calibrate the master clock to the slave near-end unit, the calibrated clock is input to the second phase-locked module 120, and the air interface recovery module 124 may input the recovered synchronous clock signal to the second air interface alignment module 121, and perform air interface alignment or air interface synchronization on the slave near-end unit by using the synchronous clock signal; meanwhile, the configuration parameters of other cascaded subordinate slave near-end units and the configuration parameters of each second far-end unit 14 may enter the second ethernet switching module 122 through the second uplink optical port 125, the configuration parameters of each second far-end unit 14 may be sent to the local baseband processing module corresponding to the slave near-end unit 12 by the second ethernet switching module 122, and after being processed in the local baseband processing module, the configuration parameters are forwarded to each second far-end unit 14 by the second ethernet switching module 122 through the second local optical port 127, and the configuration parameters of other cascaded subordinate slave near-end units may enter the subordinate slave near-end units through the second ethernet switching module 122 and the second downlink optical port 126, and perform the same operation as that of the first subordinate near-end unit.
In addition, the downlink service data sent by the master near-end unit 11 to each slave near-end unit firstly enters the first ethernet switching module 112, and then enters the second ethernet switching module 122 of the slave near-end unit 12 through the first lower networking port 116 and the second upper networking port 128, where the downlink service data of each slave near-end unit is also sent to each second far-end unit 14, and therefore may also be referred to as narrow service data sent to a far-end unit corresponding to each slave near-end unit, here, the downlink service data of the first slave near-end unit 12 may be sent to the local baseband processing module corresponding to the slave near-end unit 12 by the second ethernet switching module 122, and is processed in the local baseband processing module and then forwarded to each second far-end unit 14 by the second ethernet switching module 122 through the second local optical port 127 after being processed in the local baseband processing module; the downstream traffic data sent by the master near-end unit 11 to the cascaded subordinate slave near-end units will enter the subordinate slave near-end units via the second ethernet switching module 122 and the second downlink port 129, and perform the same operation as the first slave near-end unit.
Of course, each of the slave near-end units may also include a local monitoring processing module, but when the master near-end unit and each of the slave near-end units perform communication interaction, the local monitoring processing module of each of the slave near-end units may bypass, and only the local monitoring processing module of the master near-end unit is used. Of course, each slave near-end unit may also include a local crystal, but during communication interaction, the local crystal of each slave near-end unit is also bypassed. For the last-stage slave near-end unit, the corresponding lower light-coupling port and the lower networking port are not connected.
When the above-mentioned air interface synchronization is performed from the near-end unit, as shown in fig. 5, the frame number of the synchronization clock signal received from the near-end unit through the second uplink optical port is, for example, 0x95ff, the offset of the frame number is the time delay of the frame number transmitted through the optical fiber, and is approximately equal to the optical fiber delay, and the transmission advance is agreed to be 100us, so the position of the synchronization clock signal (when the synchronization clock signal is a PPS signal, that is, the position of the PPS) is the time of subtracting the optical fiber delay by 100us from the time when the frame number 0x95ff is received by the near-end unit, and thus the position of the PPS can be calculated, so that the air interface synchronization or the air interface alignment is achieved from the near-end unit.
The access network device provided in this embodiment, one of the slave near-end units of the access network device may include: the second phase locking module is connected with the first Ethernet exchange module through a first lower networking port, the second phase locking module is used for performing clock calibration on the slave near-end unit by using a calibrated clock, the second air interface alignment module is used for performing air interface synchronization on the slave near-end unit by using a synchronous clock signal sent to the slave near-end unit by the master near-end unit, and the second Ethernet exchange module is used for forwarding downlink service data sent by the first Ethernet exchange module to a cascaded subordinate slave near-end unit and a second far-end unit. In the slave near-end unit of the access network device, because the second ethernet switching module can forward data, data forwarding between the master near-end unit and each subordinate slave near-end unit can be realized, and no switch is additionally arranged outside the access network device, the access network device of the embodiment can save switch equipment, so that the hardware cost for building a station can be further reduced, and in addition, the access network device is adopted, and when the access network device is maintained in a later period, the labor cost for maintenance can be further reduced.
In an embodiment, an access network device is provided, and with continued reference to fig. 2, the description is made in an uplink procedure from a user equipment side to a network side, where the access network device in the uplink procedure includes:
the first remote unit 13 is further configured to send the received uplink service data of the first user equipment to the master near-end unit; the second remote unit 14 is further configured to send the received uplink service data of the second user equipment to the slave near-end unit; the slave near-end unit 12 is further configured to forward the received combined uplink service data to the master near-end unit; the combined uplink service data comprises uplink service data of the second user equipment and uplink service data sent by a cascaded subordinate slave near-end unit; the master near-end unit 11 is further configured to forward the combined uplink service data and the uplink service data of the first user equipment to the core network device.
In this embodiment, the uplink procedure corresponds to the downlink procedure, where the first user equipment and the second user equipment may be one or more, and the uplink service data sent by the near-end unit from the lower level in the combined uplink service data may also be the uplink service data of the remote unit within the coverage of the near-end unit from the lower level. The communication interaction process in this embodiment corresponds to the downlink process, and reference may be specifically made to the description of the downlink process, which is not described herein again.
The access network device provided by this embodiment corresponds to the downlink process, and the access network device in the uplink process is the same as the downlink process, so that the access network device is adopted to perform merging and networking, and a lot of clock source devices can be saved, thereby reducing the hardware cost for building a station.
In one embodiment, a data processing method is provided, as shown in fig. 6, which may include the steps of:
and S102, after the master near-end unit performs clock synchronization by using a synchronous clock signal sent by an external clock source, the master near-end unit forwards downlink service data issued by the core network equipment to the at least one slave near-end unit and the at least one first far-end unit.
And S104, the slave near-end unit acquires the clock of the master near-end unit from the master near-end unit, performs clock synchronization through the clock of the master near-end unit, and forwards the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit after the clock synchronization.
S106, the first remote unit receives downlink service data sent by the main near-end unit; the second remote unit receives the downlink traffic data transmitted from the near-end unit.
For specific definition of the data processing method, see the above definition of the access network device, which is not described herein again.
It should be understood that, although the steps in the flowchart of fig. 6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a portion of the steps in fig. 6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. An access network device, comprising: a master near-end unit, an external clock source, at least one slave near-end unit, at least one first remote unit, at least one second remote unit,
the master near-end unit is connected with the external clock source and the at least one slave near-end unit is cascaded, the master near-end unit is cascaded with the at least one first far-end unit, and the slave near-end unit is cascaded with the at least one second far-end unit;
the master near-end unit is configured to forward downlink service data sent by the core network device to the at least one slave near-end unit and the at least one first far-end unit after performing clock synchronization by using a synchronization clock signal sent by the external clock source; the master near-end unit acquires a synchronous clock signal sent by the external clock source, and performs clock calibration on a local crystal oscillator in the master near-end unit by using the synchronous clock signal to obtain a calibrated clock; the master near-end unit utilizes the synchronous clock signal to carry out air interface synchronization or air interface alignment; the master near-end unit is further configured to send first configuration parameters to the slave near-end unit; the first configuration parameters comprise the calibrated clock and a synchronous clock signal sent by the master near-end unit to the slave near-end unit;
the slave near-end unit is configured to obtain the calibrated clock and the synchronous clock signal from the master near-end unit, perform clock synchronization through the calibrated clock and the synchronous clock signal, and forward the downlink service data to the cascaded subordinate slave near-end unit and the at least one second far-end unit after clock synchronization;
the first remote unit is configured to receive downlink service data sent by the master near-end unit;
and the second remote unit is configured to receive the downlink service data sent from the near-end unit.
2. The access network device of claim 1, wherein the master near-end unit includes a first phase-lock module, a first air-interface alignment module, a first Ethernet switching module,
the first phase-locked module and the first air interface alignment module are respectively connected with the external clock source, and the first Ethernet switching module is connected with the slave near-end unit;
the first phase-locked module is configured to receive a synchronous clock signal sent by the external clock source, and perform clock calibration processing on the local crystal oscillator of the master near-end unit by using the synchronous clock signal to obtain a calibrated clock;
the first air interface alignment module is used for receiving a synchronous clock signal sent by the external clock source and carrying out air interface synchronization on the master near-end unit by adopting the synchronous clock signal;
the first ethernet switching module is configured to forward downlink service data sent by the core network device to the slave near-end unit and the first far-end unit.
3. The access network device of claim 2, wherein the master near-end unit further comprises a first upper networking port and a first lower networking port, the first upper networking port is connected with the core network device, and the first lower networking port is connected with the slave near-end unit;
downlink service data sent by the core network equipment is sent to the first Ethernet switching module through the first uplink network port;
the first ethernet switching module forwards the downlink traffic data to the slave near-end unit through the first downlink port.
4. The access network apparatus of claim 3,
the first ethernet switching module is further configured to send a second configuration parameter to the slave near-end unit, and send a third configuration parameter to the first far-end unit;
the second configuration parameter includes frequency point information of the second remote unit, and the third configuration parameter includes frequency point information of the first remote unit.
5. The access network device according to claim 4, wherein the master near-end unit further includes a first lower optical port and a first local optical port, the first lower optical port is connected to the first air interface alignment module and the first ethernet switching module, respectively, and the first local optical port is connected to the first ethernet switching module;
the first Ethernet switching module sends the first configuration parameter and the second configuration parameter to the slave near-end unit through the first downlink optical port;
and the first ethernet switching module sends the third configuration parameter to the first remote unit through the first local optical port.
6. The access network device of claim 5, wherein the slave near-end unit comprises a second phase-locking module, a second air interface alignment module, and a second Ethernet switching module, and the second Ethernet switching module and the first Ethernet switching module are connected through the first lower networking port;
the second phase-locking module is used for performing clock calibration on the slave near-end unit by adopting the calibrated clock;
the second air interface alignment module is configured to perform air interface synchronization on the slave near-end unit by using a synchronization clock signal sent by the master near-end unit to the slave near-end unit;
the second ethernet switching module is configured to forward the downlink service data sent by the first ethernet switching module to the cascaded subordinate slave near-end unit and the second far-end unit.
7. The access network apparatus of claim 6, wherein the first configuration parameter comprises a first configuration parameter of the slave near-end unit and a first configuration parameter of the cascaded subordinate slave near-end unit;
the second ethernet switching module is further configured to forward the first configuration parameters of the subordinate slave near-end unit of the cascade to the subordinate slave near-end unit of the cascade, and to send the second configuration parameters to the second remote unit.
8. The access network device of claim 7, wherein the slave near-end unit further includes a clock recovery module and an air interface recovery module, the clock recovery module is connected to the second phase-locked module, and the air interface recovery module is connected to the second air interface alignment module;
the clock recovery module is configured to analyze the first configuration parameter of the slave near-end unit to obtain the calibrated clock, and send the calibrated clock obtained through analysis to the second phase-locking module;
the air interface recovery module is configured to analyze the first configuration parameter of the slave near-end unit to obtain a synchronous clock signal sent by the master near-end unit to the slave near-end unit, and send the synchronous clock signal obtained by the analysis to the second air interface alignment module.
9. The access network device of claim 8, wherein the slave near-end unit further comprises a second upper optical port and a second lower optical port and a second local optical port,
the second uplink optical port is connected to the first downlink optical port, the second local optical port is connected to the second ethernet switching module, and the second uplink optical port is connected to the clock recovery module and the air interface recovery module respectively;
the first ethernet switching module sends the first configuration parameter of the slave near-end unit to the clock recovery module and the air interface recovery module through the first downlink optical port and the second uplink optical port;
the second ethernet switching module sends the first configuration parameter of the subordinate slave near-end unit of the cascade to the subordinate slave near-end unit of the cascade through the second downlink optical port;
and the second ethernet switching module sends the second configuration parameter to the second remote unit through the second local optical port.
10. The access network device of claim 9, wherein the slave near-end unit further comprises a second upper networking port and a second lower networking port, the second upper networking port and the first lower networking port being connected;
the downlink service data sent by the first ethernet switching module is sent to the second ethernet switching module through the second uplink port;
and the second ethernet interaction module forwards the downlink service data to the cascaded subordinate slave near-end unit through the second downlink network port.
11. The access network device of claim 1,
the first remote unit is further configured to send the received uplink service data of the first user equipment to the master near-end unit;
the second remote unit is further configured to send the received uplink service data of the second user equipment to the slave near-end unit;
the slave near-end unit is further configured to forward the received combined uplink service data to the master near-end unit; the combined uplink service data comprises uplink service data of second user equipment and uplink service data sent by the cascaded subordinate slave near-end unit;
the master near-end unit is further configured to forward the combined uplink service data and the uplink service data of the first user equipment to the core network device.
12. A method of data processing, the method comprising:
the method comprises the steps that after clock synchronization is carried out on a synchronous clock signal sent by an external clock source, a master near-end unit forwards downlink service data issued by core network equipment to at least one slave near-end unit and at least one first far-end unit; wherein, include: the master near-end unit acquires a synchronous clock signal sent by the external clock source, and performs clock calibration on a local crystal oscillator in the master near-end unit by using the synchronous clock signal to obtain a calibrated clock; the master near-end unit utilizes the synchronous clock signal to carry out air interface synchronization or air interface alignment; the master near-end unit sending first configuration parameters to the slave near-end unit; the first configuration parameters comprise the calibrated clock and a synchronous clock signal sent by the master near-end unit to the slave near-end unit;
the slave near-end unit acquires the calibrated clock and the synchronous clock signal from the master near-end unit, performs clock synchronization through the calibrated clock and the synchronous clock signal, and forwards the downlink service data to a cascaded subordinate slave near-end unit and at least one second far-end unit after clock synchronization;
the first remote unit receives downlink service data sent by the master near-end unit;
and the second remote unit receives the downlink service data sent from the near-end unit.
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