WO2014100982A1 - Procédé de synchronisation d'interface radio et appareil associé - Google Patents

Procédé de synchronisation d'interface radio et appareil associé Download PDF

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Publication number
WO2014100982A1
WO2014100982A1 PCT/CN2012/087457 CN2012087457W WO2014100982A1 WO 2014100982 A1 WO2014100982 A1 WO 2014100982A1 CN 2012087457 W CN2012087457 W CN 2012087457W WO 2014100982 A1 WO2014100982 A1 WO 2014100982A1
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WO
WIPO (PCT)
Prior art keywords
base station
clock
information
synchronization
offset
Prior art date
Application number
PCT/CN2012/087457
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English (en)
Chinese (zh)
Inventor
陈萍
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN2012800020540A priority Critical patent/CN103229567A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/087457 priority patent/WO2014100982A1/fr
Publication of WO2014100982A1 publication Critical patent/WO2014100982A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to an air interface synchronization method and related device. Background technique
  • the interference is limited in the wireless communication system
  • the interference between the base stations is further increased, so that the quality of the wireless data service is degraded.
  • the base stations are synchronized to the air interface by some means at this time, the interference between the base stations can be reduced, and the service quality can be improved.
  • the propagation clock information on the Ethernet generally uses 1588V2 frequency synchronization.
  • This clock technology can meet the requirements of implementing basic wireless services.
  • IP Internet Protocol
  • Embodiments of the present invention provide an air interface synchronization method and related apparatus, which are used to improve air interface synchronization precision of a base station.
  • a first aspect of the present invention provides an air interface synchronization method, including:
  • the first base station acquires clock information from a primary reference clock
  • synchronization offset information from the base station controller, where the synchronization offset information includes a frame offset and a bit offset of the first base station relative to the second base station calculated by the base station controller, where The second base station is a base station as a reference;
  • the foregoing obtaining the synchronization offset information from the base station controller further includes:
  • the time at which the first signal is received is transmitted to the base station controller, so that the base station controller calculates a frame offset and a bit offset of the first base station relative to the second base station.
  • the foregoing first signal is: a handover that is sent after the user equipment receives a handover trigger message from the base station controller. Into the request.
  • the obtaining is
  • the clock information of the main reference clock is specifically as follows:
  • the clock information from the primary reference clock is obtained via Ethernet.
  • the foregoing first base station is a multi-mode base station
  • the acquiring the synchronization offset information from the base station controller includes:
  • the foregoing adjusting the clock reference of the first base station includes:
  • the method further includes:
  • a second aspect of the present invention provides another air interface synchronization method, including:
  • the base station controller calculates a frame offset and a bit offset of the first base station relative to the second base station, to obtain synchronization offset information, where the second base station is a base station as a reference;
  • Calculating the frame offset and the bit offset of the first base station relative to the second base station including: Acquiring the first measurement information and the second measurement information, where the first measurement information includes a time when the first base station receives the first signal, and a time advance quantity of the first base station measured by the user equipment, where the second measurement information is The time period in which the second base station receives the first signal and the time advance of the second base station measured by the user equipment, where the user equipment is located in a common coverage of the first base station and the second base station;
  • the foregoing determining, by the base station controller, the first measurement information and the second measurement information
  • the first signal is a handover access request sent by the user equipment after receiving the handover trigger message.
  • the method further includes:
  • the local clock of the base station controller is adjusted to synchronize the base station controller with other base station controllers on an air interface, wherein a primary reference clock of the base station under the other base station controller is the same as a primary reference clock of the second base station.
  • a third aspect of the present invention provides a base station, including:
  • a first acquiring unit configured to acquire clock information from a primary reference clock
  • a second acquiring unit configured to acquire synchronization offset information from the base station controller, where the synchronization offset information includes a frame offset and a bit offset of the base station calculated by the base station controller with respect to another base station
  • the other base station is a base station as a reference;
  • an adjusting unit configured to adjust a clock reference of the base station according to the clock information acquired by the first acquiring unit and the synchronization offset information acquired by the second acquiring unit, so that the base station and the another base station are synchronized on an air interface.
  • the above base station further includes: a receiving unit, configured to receive a first signal sent by the user equipment, where the user equipment is located in a common coverage area of the base station and the another base station;
  • a sending unit configured to send the time when the receiving unit receives the first signal to the base station controller, so that the base station controller calculates a frame offset and a bit offset of the base station relative to the another base station.
  • the first acquiring unit is specifically configured to acquire a clock from a primary reference clock by using an Ethernet information.
  • the foregoing base station is multiple Mode base station
  • the foregoing second obtaining unit is specifically configured to: acquire synchronization offset information from a base station controller working in the first network standard;
  • the adjusting unit is configured to: adjust a clock reference of the base station in the first network system according to the clock information acquired by the first acquiring unit and the synchronization offset information acquired by the second acquiring unit, so that the first The base station synchronizes with the second base station on the air interface in the foregoing first network system;
  • the adjusting unit is further configured to: adjust a clock reference of the base station in another network standard according to the synchronization offset information, where the other network standard is: one or two types supported by the base station except the first network standard Above network standard.
  • a fourth aspect of the present invention provides a base station controller, including:
  • a calculating unit configured to calculate a frame offset and a bit offset of the first base station relative to the second base station, to obtain synchronization offset information, where the second base station is a base station as a reference;
  • a sending unit configured to send the synchronization offset information calculated by the calculating unit to the first base station, so that the first base station adjusts a clock reference of the first base station according to the synchronization offset information, so that the first base station and the foregoing
  • the two base stations are synchronized on the air interface.
  • the above calculation unit includes:
  • An acquiring unit configured to acquire first measurement information and second measurement information, where the foregoing first measurement
  • the information includes the time when the first base station receives the first signal and the time advance of the first base station measured by the user equipment, where the second measurement information includes the time when the second base station receives the first signal, and the user equipment. Measure the time advance of the second base station, where the user equipment is located in a common coverage area of the first base station and the second base station;
  • a calculating subunit configured to calculate a frame offset and a bit offset of the first base station relative to the second base station according to the first measurement information and the second measurement information acquired by the acquiring unit.
  • the acquiring unit includes:
  • a sending subunit configured to send a handover trigger message to the user equipment, to instruct the user equipment to perform handover
  • the first signal is a handover access request sent by the user equipment after receiving the handover trigger message.
  • the foregoing base station control Also includes:
  • An adjusting unit configured to adjust a local clock of the base station controller before calculating the synchronization offset information, so that the base station controller synchronizes with other base station controllers on an air interface, where the primary reference of the base station under the other base station controllers
  • the clock is the same as the primary reference clock of the second base station described above.
  • a fifth aspect of the present invention provides another base station, including:
  • the transceiver device is configured to: acquire clock information from a primary reference clock; acquire synchronization offset information from a base station controller, where the synchronization offset information includes the base station calculated by the base station controller relative to another base station Frame offset and bit offset, wherein the other base station is a base station as a reference;
  • the processor is configured to adjust a clock reference of the base station according to the clock information acquired by the transceiver and the synchronization offset information, so that the base station and the another base station are synchronized on an air interface.
  • the above transceiver device is also used to:
  • the time at which the first signal is received is transmitted to the base station controller, so that the base station controller calculates a frame offset and a bit offset of the base station relative to the other base station.
  • the transceiver is specifically configured to: obtain clock information from a primary reference clock through an Ethernet.
  • the foregoing base station is Multimode base station
  • the transceiver device is specifically configured to: acquire synchronization offset information from a base station controller operating in a first network standard;
  • the processor is specifically configured to: adjust, according to the clock information acquired by the transceiver device and the synchronization offset information, a clock reference of the base station in the first network standard, so that the first base station is in the first network standard
  • the second base station is synchronized on the air interface
  • the processor is further configured to: adjust, according to the synchronization offset information acquired by the transceiver device, a clock reference of the base station in another network standard, where the other network system is: a unit supported by the base station except the first network standard.
  • the other network system is: a unit supported by the base station except the first network standard.
  • a sixth aspect of the present invention provides another base station controller, including:
  • the processor is configured to calculate a frame offset and a bit offset of the first base station relative to the second base station to obtain synchronization offset information, where the second base station is a base station as a reference;
  • the transmitting and receiving device is configured to send, to the first base station, synchronization offset information obtained by the processor, so that the first base station adjusts a clock reference of the first base station according to the synchronization offset information, so that the first base station and the second base The base station synchronizes on the air interface.
  • the above transceiver device is also used to:
  • the first measurement information includes a time when the first base station receives the first signal, and a time advance quantity of the first base station measured by the user equipment, where the second measurement information is And including the time that the second base station receives the first signal, and the foregoing The time advance of the second base station measured by the user equipment, where the user equipment is located in a common coverage area of the first base station and the second base station;
  • the processor is specifically configured to calculate a frame offset and a bit offset of the first base station relative to the second base station according to the first measurement information and the second measurement information acquired by the transceiver.
  • the transceiver apparatus is further configured to: send a handover trigger message to the user equipment, and instruct the user equipment to perform handover;
  • the first signal is a handover access request sent by the user equipment after receiving the handover trigger message.
  • the foregoing processor further includes: adjusting a local clock of the base station controller before calculating the synchronization offset information, so that the base station controller synchronizes with other base station controllers on an air interface, where a primary reference clock of the base station under the other base station controllers is used. The same as the primary reference clock of the second base station described above.
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the consistency of the clock source of the other base stations since the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • FIG. 1 is a schematic flowchart of an embodiment of an air interface synchronization method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart diagram of another embodiment of an air interface synchronization method according to the present invention. Schematic;
  • FIG. 4 is a schematic structural diagram of an embodiment of a base station controller according to the present invention.
  • FIG. 5 is a schematic structural diagram of another embodiment of a base station according to the present invention.
  • FIG. 6 is a schematic structural diagram of another embodiment of a base station controller according to the present invention. detailed description Embodiments of the present invention provide an air interface synchronization method and related apparatus.
  • the air interface synchronization method in the embodiment of the present invention includes:
  • the first base station acquires clock information from a primary reference clock.
  • the primary reference clock is a national first-class clock source, and the autonomous atomic clock or the satellite atomic clock (such as the Global Positioning System). It is composed of a global navigation satellite system (Global Navigation Satellite Syste) and other positioning systems.
  • the PCR transmits a timing reference signal (ie, clock information) through a timing reference transmission link, which serves as a fundamental guarantee for the entire network synchronization reference.
  • the PRC provides the most original clock information for the first base station, and the clock information is used to determine the clock period of each base station.
  • the first base station may obtain the clock information of the PRC from the physical layer through the Ethernet.
  • the clock information of the PRC may be transparently transmitted to the first base station by using the intermediate node connected to the first base station by the PRC. The manner in which the base station acquires clock information from the PRC is limited.
  • the synchronization offset information includes a frame offset and a bit offset of the first base station calculated by the base station controller with respect to the second base station, where the second base station is a reference base station.
  • the second base station in the network is used as the reference base station.
  • the base station controller identifies a user equipment (UE, User Equipment) that is in the common coverage of the first base station and the second base station, and sends a handover trigger message to the UE, triggering the UE to perform handover, the UE And reporting, by the base station controller, a timing advance (TA, Timing Advance) value in the measurement report of the first base station and the second base station, and the UE is to the target base station (assuming that the current serving base station of the UE is the second base station, The target base station is the first base station, and anyway, assuming that the current serving base station of the UE is the first base station, the target base station sends a handover access request (ie, handover access) to the second base station.
  • UE user equipment
  • UE User Equipment
  • the handover access signal can be simultaneously captured by the first base station and the second base station, and the first base station and the second base station respectively record the time when the handover access signal is received: including the radio frame number and the bit position when the handover access signal is received. .
  • the first base station and the second base station respectively send the recorded time when the handover access signal is received to the base station controller, and the base station controller receives the handover access signal according to the first base station and the second base station, and the first time Calculating a frame offset and a bit offset of the first base station relative to the second base station by using a TA value of the base station and the second base station, and including a frame offset and a bit offset of the first base station relative to the second base station
  • the synchronization offset information is notified to the first base station.
  • the radio frame number and the bit reported by the first base station are fn1 and bit1
  • the radio frame number and the bit reported by the second base station are fn2 and bit2
  • the TA values of the first base station and the second base station are TA1 and TA2, respectively.
  • the frame offset and the bit offset of the first base station relative to the second base station are respectively:
  • Bit offset ( bitl-bit2 ) + ( TA1-TA2 ) 12.
  • the handover access signal is used as the first signal.
  • the first signal may also be other messages.
  • the base station controller identifies the common coverage between the first base station and the second base station.
  • the UE may send a synchronization indication command to the UE, and instruct the UE to report the TA value in the measurement report of the first base station and the second base station to the base station controller, and make the UE simultaneously to the first base station and the first base station.
  • the other first signal is sent, so that the first base station and the second base station respectively send the recorded time when the first signal is received to the base station controller, which is not limited herein.
  • the base station controller may calculate the frame offset and the bit offset of the first base station relative to the second base station by using other methods, which is not limited herein.
  • the first base station adjusts the clock reference of the first base station according to the clock information acquired in step 101 and the synchronization offset information received in step 102, so that the first base station and the second base station are synchronized on the air interface.
  • the first base station may be a multi-mode base station, that is, supports multiple network standards at the same time (such as supporting Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA, Wideband). Code Division Multiple A base station of a network system such as an LTE (Long Term Evolution) system.
  • GSM Global System for Mobile Communications
  • WCDMA Wideband Code Division Multiple Access
  • Code Division Multiple A base station of a network system such as an LTE (Long Term Evolution) system.
  • LTE Long Term Evolution
  • a different network system in a multi-mode base station implements clock maintenance by different clock modules. Therefore, the embodiment of the present invention can be utilized in an embodiment of the present invention.
  • the synchronization offset information obtained in the network standard is used to adjust the clock base station of another network system or the following, as follows: Assume that the first base station synchronizes in the first network standard, when the first base station acquires the first network After the synchronization offset information of the base station controller of the system is working, the clock reference in the other network system may be adjusted according to the synchronization offset information, where the other network standard may be the first network standard supported by the first base station. At least one network standard other than the one.
  • the first base station is a base station that needs to perform air interface synchronization, and a plurality of first base stations may exist in an actual network.
  • the method in the embodiment of the present invention may be used.
  • the technical solution implements the air interface synchronization, and the embodiment of the present invention may enable the multiple first base stations to simultaneously perform the technical solution in the embodiment of the present invention, or after the first base station performs the technical solution in the embodiment of the present invention, The other first base station performs the technical solution in the embodiment of the present invention until all the first base stations synchronize with the base station as the reference on the air interface.
  • the base station as the reference in the embodiment of the present invention is not an absolute base station, but may be one of all base stations that have completed air interface synchronization, that is, the second base station in the embodiment of the present invention may be It is a base station that is initially determined by the base station controller for use as a reference, and may also be a base station that has been synchronized with the base station that is initially determined by the base station controller for the base station to be synchronized on the air interface, which is not limited herein.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the foregoing base station controller may have other names.
  • the foregoing base station controller It may be a Base Station Controller (BSC).
  • BSC Base Station Controller
  • RNC Radio Network Controller
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the consistency of the clock source of the other base stations since the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to act as a base
  • the base station of the station synchronizes on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • the air interface synchronization method in the embodiment of the present invention is described below with reference to the base station controller. Referring to FIG. 2, the air interface synchronization method in the embodiment of the present invention includes:
  • the base station controller calculates a frame offset and a bit offset of the first base station relative to the second base station, to obtain synchronization offset information.
  • the second base station is a base station as a reference.
  • the base station controller acquires the first measurement information and the second measurement information, where the first measurement information includes a time when the first base station receives the first signal, and the first base station that is measured by the UE.
  • the second measurement information includes a time when the second base station receives the first signal, and a time advance of the second base station that is measured by the UE, where the UE is the first base station and the second Base stations within the common coverage of the base station, and the second base station is a base station as a reference.
  • the base station controller calculates a frame offset and a bit offset of the first base station relative to the second base station according to the obtained first measurement information and second measurement information, to obtain synchronization offset information.
  • the base station controller may obtain the first measurement information and the second measurement information by: the base station controller identifying the UE that is in the common coverage of the first base station and the second base station, and sending a handover trigger message to the UE, triggering The UE performs handover, and the UE reports the TA value in the measurement report of the first base station and the second base station to the base station controller, and the UE goes to the target base station (assuming that the current serving base station of the UE is the second base station, the target base station For the first base station, anyway, assuming that the current serving base station of the UE is the first base station, the target base station sends handover access (ie, the first signal) to the second base station, and the handover access signal can be simultaneously used by the first base station and the second base station.
  • the target base station sends handover access (ie, the first signal) to the second base station, and the handover access signal can be simultaneously used by the first base station and the second base station.
  • the base station captures, the first base station and the second calculation respectively record the time when the handover access signal is received: the radio frame number and the bit when the handover access signal is received, and the first base station and the second base station respectively receive the record
  • the time to the handover access signal is sent to the base station controller.
  • the base station controller calculates the frame offset of the first base station relative to the second base station according to the time when the first base station and the second base station report the received access signal, and the TA values of the first base station and the second base station.
  • the shift and the bit offset for example: assuming that the radio frame number and the bit reported by the first base station are fnl and bitl, and the radio frame number and the bit reported by the second base station are fn2 and bit2, the first base station and the second base station
  • Bit offset ( bitl-bit2 ) + ( TA1-TA2 ) 12.
  • the foregoing first signal may also be other messages.
  • the base station controller sends a synchronization indication command to the UE, indicating that the UE is to the base station.
  • the controller reports the TA value in the measurement report of the first base station and the second base station, and causes the UE to simultaneously send another first signal to the first base station and the first base station, so that the first base station and the second base station respectively record
  • the time at which the first signal is received (including the radio frame number and the bit when the first signal is received) is sent to the base station controller, which is not limited herein.
  • the base station controller may calculate the frame offset and the bit offset of the first base station relative to the second base station by using other methods, which is not limited herein.
  • the base station controller And transmitting, by the base station controller, the synchronization offset information to the first base station, so that the first base station adjusts a clock reference of the first base station according to the synchronization offset information, so that the first base station and the second base station are synchronized on an air interface.
  • multiple base station controllers may exist in the same network. Therefore, multiple base station controllers need to complete synchronization on the air interface first. Therefore, if multiple base station controllers exist in the same network, Before the step 101, the base station controller adjusts its local clock to synchronize the base station controller with other base station controllers on the air interface.
  • the PRC of the base station under the other base station controllers is the same as the PRC of the second base station.
  • the base station controller can adjust the local clock by: for example, installing a GPS antenna on the base station controller and the other base station controllers, so that the base station controller and the other base station controllers have the same clock reference, or The base station controller and the other base station controllers directly obtain clock information from the same PRC to achieve air interface synchronization.
  • the base station controller can also adjust its local clock in other manners to synchronize the base station controller with other base station controllers on the air interface.
  • the embodiment of the present invention does not limit the manner in which the base station controller adjusts its local clock.
  • the first base station is a base station that needs to perform air interface synchronization, and a plurality of first base stations may exist in an actual network.
  • the method in the embodiment of the present invention may be used.
  • the technical solution implements air interface synchronization, and the embodiment of the present invention may enable multiple first base stations to simultaneously perform the technical solutions in the embodiments of the present invention, and may also perform the present invention in one of the first base stations.
  • the technical solution in the embodiment of the present invention is performed by another first base station until all the first base stations are synchronized with the base station as the reference on the air interface.
  • the base station as the reference in the embodiment of the present invention is not an absolute base station, but may be one of all base stations that have completed air interface synchronization, that is, the second base station in the embodiment of the present invention may be It is a base station that is initially determined by the base station controller for use as a reference, and may also be a base station that has been synchronized with the base station that is initially determined by the base station controller for the base station to be synchronized on the air interface, which is not limited herein.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the foregoing base station controller may have other names.
  • the foregoing base station controller It may be a Base Station Controller (BSC).
  • BSC Base Station Controller
  • RNC Radio Network Controller
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • a base station in the embodiment of the present invention is described below. Referring to FIG. 3, the base station 300 in the embodiment of the present invention includes:
  • a first obtaining unit 301 configured to acquire clock information from the PRC
  • the PRC is a national first-level clock source, which provides the first base station with the most original clock information, and the clock information is used to determine the clock period of each base station.
  • the first obtaining unit 301 can obtain the clock information of the PRC from the physical layer through the Ethernet, or can transmit the clock information of the PRC to the first acquiring unit 301 through the intermediate nodes connected to the base station 300 by the PRC.
  • the manner in which the first acquisition unit 301 acquires clock information from the PRC is not limited.
  • the second obtaining unit 302 is configured to acquire synchronization offset information from the base station controller, where the synchronization offset information includes a frame offset and a bit offset of the base station 300 calculated by the base station controller with respect to another base station.
  • the other base station is a base station as a reference; In the embodiment of the present invention, the second base station in the network is used as the reference base station.
  • the base station 300 further includes: a receiving unit and a sending unit, where the receiving unit is configured to receive a first signal sent by the UE, where the UE is located in a common coverage range of the base station 300 and the another base station; The unit is configured to send the time when the receiving unit receives the first signal to the base station controller, so that the base station controller calculates a frame offset and a bit offset of the base station 300 with respect to the another base station.
  • the base station controller may send a handover trigger message to the UE, trigger the UE to perform handover, and the UE reports the base station 300 to the base station controller.
  • the TA value in the measurement report of the another base station, and the UE will be to the target base station (assuming that the current serving base station of the UE is the other base station, the target base station is the base station 300, anyway, assuming the current serving base station of the UE
  • the target base station sends a handover access request (ie, the other base station)
  • the handover access signal can be simultaneously captured by the first base station and the second base station, and the base station 300 and the other base station separately record
  • the time when the handover access signal is received including the radio frame number and the bit position when the handover access signal is received.
  • the base station 300 and the another base station respectively send the recorded time when the handover access signal is received to the base station controller, and the base station controller according to the time when the base station 300 and the another base station receive the handover access signal, and Calculating the frame offset and the bit offset of the base station 300 with respect to the other base station, the base station 300 and the TA value of the other base station, and including the frame offset and the bit offset of the base station 300 with respect to the other base station.
  • the shifting synchronization offset information is notified to the first base station.
  • the radio frame number and the bit position of the base station 300 are fn1 and bit1
  • the radio frame number and bit reported by the other base station are fn2 and bit2
  • the TA values of the base station 300 and the other base station are respectively TA1 and TA2
  • the frame offset and the bit offset of the base station 300 relative to the other base station are respectively:
  • Bit offset ( bitl-bit2 ) + ( TA1-TA2 ) /2.
  • the handover access signal is used as the first signal.
  • the first signal may also be other messages.
  • the base station controller identifies the base station 300 and the foregoing. After the UE in the common coverage of the other base station, the UE may send a synchronization indication command to the UE, indicating that the UE reports the base station 300 and the other base station to the base station controller.
  • the TA value in the quantity report and causes the UE to simultaneously send another first signal to the base station 300 and the another base station, so that the base station 300 and the another base station respectively send the recorded time of receiving the first signal to
  • the base station controller is not limited herein.
  • the base station controller may calculate the frame offset and the bit offset of the base station 300 with respect to the other base station by using other methods, which is not limited herein.
  • the adjusting unit 303 is configured to adjust the clock reference of the base station 300 according to the clock information acquired by the first acquiring unit 301 and the synchronization offset information acquired by the second acquiring unit 302, so that the base station 300 synchronizes with the another base station on the air interface. .
  • the base station 300 may be a multi-mode base station, that is, a base station that supports multiple network standards (such as network standards supporting GSM, WCDMA, and LTE) at the same time.
  • network standards such as network standards supporting GSM, WCDMA, and LTE
  • different network standards in the multi-mode base station are different.
  • the clock module can implement the maintenance of the clock.
  • the synchronization offset information obtained in one network standard can be used to adjust the clock base station of another network system or multiple network standards, as follows:
  • the second obtaining unit 302 is configured to: acquire the synchronization offset information from the base station controller working in the first network standard, and the adjusting unit 303 is further configured to: according to the second obtaining unit 302,
  • the obtained synchronization offset information adjusts the clock reference of the base station 300 in other network standards, wherein the other network system is: one or two or more network standards supported by the base station 300 except the first network system.
  • the base station as the reference in the embodiment of the present invention is not an absolute base station, but may be one of all base stations that have completed air interface synchronization, that is, another base station in the embodiment of the present invention may be It is a base station that is initially determined by the base station controller for use as a reference, and may also be a base station that has been synchronized with the base station that is initially determined by the base station controller for the base station to be synchronized on the air interface, which is not limited herein.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the base station controller may have other names.
  • the foregoing base station controller It may be a BSC.
  • the above base station controller may also refer to an RNC.
  • the base station 300 in the embodiment of the present invention may be used as the first base station in the foregoing method embodiment, and may be used to implement all the technical solutions in the foregoing method embodiments, and the functions of the respective functional modules may be implemented according to the foregoing method.
  • the method in the example is embodied, and the specific implementation process can refer to the above Related descriptions in the embodiments are not described herein again.
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the consistency of the clock source of the other base stations since the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • a base station controller in the embodiment of the present invention is described below. Referring to FIG. 4, the base station controller 400 in the embodiment of the present invention includes:
  • the calculating unit 401 is configured to calculate a frame offset and a bit offset of the first base station relative to the second base station, to obtain synchronization offset information, where the second base station is a base station as a reference;
  • the calculating unit 401 includes: an obtaining unit and a calculating subunit, where the acquiring unit is configured to acquire the first measurement information and the second measurement information, where the first measurement information includes the first base station received a time of a signal and a TA value of the first base station measured by the UE, where the second measurement information includes a time when the second base station receives the first signal, and a TA value of the second base station measured by the UE, where The computing unit is located in the common coverage of the first base station and the second base station; the calculating subunit is configured to: calculate, according to the first measurement information and the second measurement information acquired by the acquiring unit, the first base station, The frame offset and bit offset of the second base station.
  • the foregoing obtaining unit includes:
  • a sending subunit configured to send a handover trigger message to the UE, to instruct the UE to perform handover.
  • the UE when the UE receives the handover trigger message, the UE reports the TA value in the measurement report of the first base station and the second base station to the base station controller 400, and the UE goes to the target base station (assuming the The current serving base station of the UE is the second base station, and the target base station is the first base station.
  • the target base station sends the handover access (ie, the first signal).
  • the handover access signal may be simultaneously captured by the first base station and the second base station, and the first base station and the second calculation respectively record the time when the handover access signal is received: including the radio frame number and the bit when the handover access signal is received.
  • the first base station and the second base station respectively send the recorded time when the handover access signal is received to the base station controller.
  • the foregoing first signal may also be another message.
  • the base station controller 400 sends a synchronization indication command to the UE by using the foregoing sending subunit, indicating
  • the UE reports the TA value in the measurement report of the first base station and the second base station to the base station controller 400, and causes the UE to simultaneously send another first signal to the first base station and the first base station, so that the first base station and the first base station
  • the second base station sends the recorded time of receiving the first signal (including the radio frame number and the bit when the first signal is received) to the base station controller 400, which is not limited herein.
  • the calculation unit 401 may calculate the frame offset and the bit offset of the first base station relative to the second base station by using other methods, which is not limited herein.
  • the sending unit 402 is configured to send the synchronization offset information calculated by the calculating unit 401 to the first base station, so that the first base station adjusts the clock reference of the first base station according to the synchronization offset information, so that the first base station and the foregoing
  • the second base station synchronizes on the air interface.
  • the base station The controller 400 also includes:
  • An adjusting unit configured to adjust the base station controller before calculating the synchronization offset information by the calculating unit 401
  • the base station controller 400 local clocks, so that the base station controller 400 synchronizes with other base station controllers on the air interface, wherein the PRC of the base station under the other base station controllers is the same as the PRC of the second base station.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the base station controller 400 may have other names.
  • the base station controller 400 may be a BSC, and in a 3G network, the base station controller 400 may also be referred to as an RNC.
  • the base station controller 400 in the embodiment of the present invention may be used as the base station controller in the foregoing method embodiment, and may be used to implement all the technical solutions in the foregoing method embodiments, and the functions of the respective functional modules may be based on the foregoing.
  • the method in the method embodiment is specifically implemented. For the specific implementation process, refer to the related description in the foregoing embodiment, and details are not described herein again.
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, Therefore, adjusting the clock reference of the base station by the synchronization offset information of the base station enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization precision of the base station.
  • the base station 500 in the embodiment of the present invention includes:
  • Transceiver 501 and processor 502 are identical to each other;
  • the transceiver device 501 is configured to: acquire clock information from the PRC; and acquire synchronization offset information from the base station controller, where the synchronization offset information includes a frame of the base station 500 calculated by the base station controller with respect to another base station. An offset and a bit offset, wherein the another base station is a base station as a reference;
  • the PRC is a national first-level clock source, which provides the first base station with the most original clock information, and the clock information is used to determine the clock period of each base station.
  • the transceiver device 501 can obtain the clock information of the PRC from the physical layer through the Ethernet.
  • the clock information of the PRC can be transparently transmitted to the transceiver device 501 through the intermediate nodes connected to the base station 500 by the PRC. The way to get the clock information from the PRC is limited.
  • the second base station in the network is used as the reference base station.
  • the transceiver 501 is further configured to: receive a first signal sent by the UE, where the UE is located in a common coverage of the base station 500 and the another base station; and send the time when the first signal is received
  • the base station controller is provided such that the base station controller calculates a frame offset and a bit offset of the base station 500 with respect to the other base station.
  • the base station controller may send a handover trigger message to the UE, trigger the UE to perform handover, and the UE reports the base station 500 to the base station controller.
  • the TA value in the measurement report of the another base station, and the UE will be to the target base station (assuming that the current serving base station of the UE is the other base station, the target base station is the base station 500, anyway, assuming the current serving base station of the UE
  • the target base station sends a handover access request (ie, the handover access), and the handover access signal can be simultaneously captured by the first base station and the second base station, and the base station 500 and the another base station respectively Recording the time when the handover access signal is received: including the radio frame number and bit position when the handover access signal is received.
  • the base station 500 and the another base station respectively send the recorded time when the handover access signal is received to the base station controller, and the base station controller according to the base station 500 and the other base
  • the time at which the handover access signal is received on the station and the TA value of the base station 500 and the other base station are calculated, and the frame offset and the bit offset of the base station 500 relative to the other base station are calculated, and the base station is included.
  • the synchronization offset information of 500 with respect to the frame offset and the bit offset of the other base station is notified to the first base station.
  • the radio frame number and the bit position of the base station 500 are fn1 and bit1
  • the radio frame number and bit reported by the other base station are fn2 and bit2
  • the TA values of the base station 500 and the other base station are respectively
  • the frame offset and bit offset of the base station 500 with respect to the other base station are respectively:
  • Bit offset ( bitl-bit2 ) + ( TA1-TA2 ) 12.
  • the handover access signal is used as the first signal.
  • the first signal may also be other messages.
  • the base station controller identifies the base station 500 and the foregoing. After the UE in the common coverage of the other base station, the UE may send a synchronization indication command to the UE, indicating that the UE reports the TA value in the measurement report of the base station 500 and the another base station to the base station controller, and causes the UE to simultaneously
  • the base station 500 and the other base station send another type of first signal, so that the base station 500 and the another base station respectively send the recorded time when the first signal is received to the base station controller, which is not limited herein.
  • the base station controller may calculate the frame offset and the bit offset of the base station 500 with respect to the other base station by using other methods, which is not limited herein.
  • the processor 502 is configured to: adjust the clock reference of the base station 500 according to the clock information acquired by the transceiver device 501 and the synchronization offset information, so that the base station and the another base station are synchronized on the air interface.
  • the base station 500 may be a multi-mode base station, that is, a base station supporting multiple network standards (such as a network standard supporting GSM, WCDMA, and LTE) at the same time.
  • a multi-mode base station that is, a base station supporting multiple network standards (such as a network standard supporting GSM, WCDMA, and LTE) at the same time.
  • different network standards in the multi-mode base station are different.
  • the clock module can implement the maintenance of the clock.
  • the synchronization offset information obtained in one network standard can be used to adjust the clock base station of another network system or multiple network standards, as follows:
  • the synchronization is performed in the first network
  • the transceiver 501 is specifically configured to: acquire the synchronization offset information from the base station controller working in the first network standard
  • the processor 502 is further configured to: acquire the synchronization offset according to the transceiver 501.
  • the shift information adjusts the clock reference of the base station 500 in other network standards, wherein the other network system is: one or two or more network standards supported by the base station 500 except the first network system.
  • the transceiver 501 in the embodiment of the present invention may include an antenna as shown in FIG. 5 to transmit and receive radio frequency signals through the antenna.
  • the antenna on the base station 500 may also be a component independent of the transceiver 501. limited.
  • the base station as the reference in the embodiment of the present invention is not an absolute base station, but may be one of all base stations that have completed air interface synchronization, that is, another base station in the embodiment of the present invention may be It is a base station that is initially determined by the base station controller for use as a reference, and may also be a base station that has been synchronized with the base station that is initially determined by the base station controller for the base station to be synchronized on the air interface, which is not limited herein.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the base station controller may have other names.
  • the foregoing base station controller It may be a BSC.
  • the above base station controller may also refer to an RNC.
  • the base station 500 in the embodiment of the present invention may be used as the first base station in the foregoing method embodiment, and may be used to implement all the technical solutions in the foregoing method embodiments, and the functions of the respective functional modules may be implemented according to the foregoing method.
  • the method in the example is specifically implemented.
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • Another base station controller in the embodiment of the present invention is described below. Referring to FIG. 6, the base station controller 600 in the example of the present invention includes:
  • Transceiver 601 and processor 602 are Transceiver 601 and processor 602;
  • the processor 602 is configured to calculate a frame offset and a bit offset of the first base station relative to the second base station to obtain synchronization offset information, where the second base station is a base station as a reference.
  • the transceiver device 601 is configured to send the synchronization offset information obtained by the processor 602 to the first base station, so that the first base station adjusts the clock reference of the first base station according to the synchronization offset information, so that the The first base station is synchronized with the second base station on the air interface.
  • the transceiver device 601 is further configured to: acquire the first measurement information and the second measurement information, where the first measurement information includes a time when the first base station receives the first signal, and the foregoing a second value of the second base station, where the second measurement information includes a time when the second base station receives the first signal, and a TA value of the second base station that is measured by the UE, where the UE is located in the first base station and the foregoing
  • the processor 602 is specifically configured to: calculate a frame offset and a bit of the first base station relative to the second base station according to the first measurement information and the second measurement information acquired by the transceiver 601 Offset.
  • the transceiver 601 is further configured to: send a handover trigger message to the UE, and instruct the UE to perform handover.
  • the UE when the UE receives the handover trigger message, the UE reports the TA value in the measurement report of the first base station and the second base station to the base station controller 600, and the UE goes to the target base station (assuming the The current serving base station of the UE is the second base station, and the target base station is the first base station.
  • the target base station sends the handover access (ie, the first signal).
  • the handover access signal can be simultaneously captured by the first base station and the second base station, and the first base station and the second calculation respectively record the time when the handover access signal is received: including the wireless connection to the handover access signal.
  • the number and the bit, the first base station and the second base station respectively send the recorded time of receiving the handover access signal to the base station controller.
  • the foregoing first signal may also be another message. For example, after identifying the UE in the common coverage of the first base station and the second base station, the base station controller 600 sends a synchronization indication command to the UE by using the transceiver 601.
  • the processor 602 may calculate the frame offset and the bit offset of the first base station relative to the second base station by using other methods, which are not limited herein.
  • multiple base station controllers may exist in the same network. Therefore, multiple base station controllers need to complete synchronization on the air interface first. Therefore, if multiple base station controllers exist in the same network, the processing is performed.
  • the controller 602 is further configured to: adjust the base station controller 600 before calculating the synchronization offset information
  • the local clock is configured to synchronize the base station controller 600 with other base station controllers on the air interface, wherein the PRC of the base station under the other base station controller is the same as the PRC of the second base station.
  • the embodiments of the present invention may be applied to Ethernet, GSM, WCDMA, and LTE systems.
  • the base station controller 600 may have other names.
  • the base station controller 600 may be a BSC.
  • the base station controller 600 may also be referred to as an RNC.
  • the base station controller 600 in the embodiment of the present invention may be used as the base station controller in the foregoing method embodiment, and may be used to implement all the technical solutions in the foregoing method embodiments, and the functions of the respective functional modules may be based on the foregoing.
  • the method in the method embodiment is specifically implemented. For the specific implementation process, refer to the related description in the foregoing embodiment, and details are not described herein again.
  • the clock reference of the base station is adjusted by acquiring clock information and synchronization offset information of the base station.
  • the clock information is from the primary reference clock, the base station and the network can be guaranteed.
  • the synchronization offset information includes the frame offset and the bit offset of the base station relative to the base station as the reference, the base station is adjusted by the synchronization offset information of the base station.
  • the clock reference enables the base station to synchronize with the base station as the base station on the air interface, which greatly improves the air interface synchronization accuracy of the base station.
  • the disclosed apparatus and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La présente invention concerne, dans des modes de réalisation, un procédé de synchronisation d'interface radio et un appareil associé. Le procédé de synchronisation d'interface radio comprend les étapes suivantes : une première station de base obtient des informations d'horloge d'une horloge de référence principale, puis obtient des informations de décalage de synchronisation d'une unité de commande de station de base, les informations de décalage de synchronisation comprenant un décalage de trame et un décalage binaire de la première station de base liés à une seconde station de base, considérée comme une station de base de référence, puis le décalage de trame et le décalage binaire sont calculés par l'unité de commande de station de base; conformément aux informations d'horloge et aux informations de décalage de synchronisation, la référence d'horloge de la première station de base est réglée pour synchroniser la première station de base avec la seconde station de base sur l'interface radio. Grâce à la solution technique fournie par la présente invention, la précision de la synchronisation d'interface radio de la station de base peut être effectivement améliorée.
PCT/CN2012/087457 2012-12-26 2012-12-26 Procédé de synchronisation d'interface radio et appareil associé WO2014100982A1 (fr)

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CN104349451B (zh) * 2013-08-09 2019-03-22 电信科学技术研究院 一种进行同步的方法和设备
CN103442426B (zh) * 2013-08-27 2016-04-06 京信通信系统（中国）有限公司 一种基站及基站间空口同步的方法和系统
CN105472725A (zh) * 2016-02-06 2016-04-06 北京佰才邦技术有限公司 基站同步方法及装置
CN108012320B (zh) * 2016-10-28 2021-06-18 中兴通讯股份有限公司 一种实现基站空口同步的方法、装置及系统
CN111954304B (zh) * 2020-07-03 2023-12-19 京信网络系统股份有限公司 一种帧偏移量的传输方法、装置、设备及介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101035327A (zh) * 2007-04-13 2007-09-12 华为技术有限公司 无线通信系统、空中接口同步方法、基站及其控制器
CN101232325A (zh) * 2008-01-31 2008-07-30 华为技术有限公司 无线通信系统、空中接口同步调整方法、基站及其控制器装置
CN102045711A (zh) * 2009-10-22 2011-05-04 中国移动通信集团公司 Lte系统中基站间的空口同步跟踪方法及基站设备
CN102264161A (zh) * 2006-11-16 2011-11-30 华为技术有限公司 基站、基站中基带信号处理方法及无线通信系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102264161A (zh) * 2006-11-16 2011-11-30 华为技术有限公司 基站、基站中基带信号处理方法及无线通信系统
CN101035327A (zh) * 2007-04-13 2007-09-12 华为技术有限公司 无线通信系统、空中接口同步方法、基站及其控制器
CN101232325A (zh) * 2008-01-31 2008-07-30 华为技术有限公司 无线通信系统、空中接口同步调整方法、基站及其控制器装置
CN102045711A (zh) * 2009-10-22 2011-05-04 中国移动通信集团公司 Lte系统中基站间的空口同步跟踪方法及基站设备

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