CN102083194A - Method, system and equipment for sending time information and synchronizing time - Google Patents
Method, system and equipment for sending time information and synchronizing time Download PDFInfo
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- CN102083194A CN102083194A CN2009102386693A CN200910238669A CN102083194A CN 102083194 A CN102083194 A CN 102083194A CN 2009102386693 A CN2009102386693 A CN 2009102386693A CN 200910238669 A CN200910238669 A CN 200910238669A CN 102083194 A CN102083194 A CN 102083194A
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Abstract
The embodiment of the invention discloses a method for sending time information and synchronizing time, comprising the following steps: a network side sends the system time information of the network side to a terminal through a downlink transmission channel; and the terminal receives the system time information from the downlink transmission channel, and corrects the local time of the terminal according to the system time information, so as to lead the corrected local time of the terminal to be synchronous with the system time. The embodiment of the invention also discloses a wireless communication system and equipment. According to the invention, the terminal can reliably and simply acquire the system time, thus ensuring that the local time and the system time of the network side are synchronous.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of temporal information transmission and method for synchronizing time, system and equipment.
Background technology
In time division duplex (TDD) mobile communication system, in order to reduce artificial drive test work, to reduce the construction and the operation cost of network, 3G (Third Generation) Moblie standardization body (3GPP) is carrying out the research work of minimum road test (MDT).
The thought of MDT is the some measuring amount of definition, and terminal is measured these measuring amount and measurement result is reported network side.Simultaneously, UE need together report network side with Measuring Time information and measurement result, is used for auxiliary network to do the network optimization.If the Measuring Time that UE reports is asynchronous with the system time of network side, can make that then network optimization work is affected.
In order to make UE can report the temporal information synchronous with system time, the local zone time that needs assurance UE safeguards and the system time of network side are consistent, and following two kinds of methods are specifically arranged at present:
First kind: the GPS mode.
By global positioning system (GPS) calibration, the UE with GPS function can receive the time signal on the GPS, utilizes this time signal UE that local zone time is calibrated, and is consistent with the system time that guarantees local zone time that UE safeguards and network side.
Second kind: time server.
Terminal is undertaken alternately to obtain system time information by application layer protocol and time server in this method.Concrete, when satisfying specified conditions, during as starting terminal, terminal is obtained request to the ntp server initiation time of network side, and extract system time information in the response message that ntp server returns, UE utilizes this system time that local zone time is calibrated then, and is consistent with the system time that guarantees local zone time that UE safeguards and network side.
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
Adopt that the system time of local zone time that the GPS mode guarantees that UE safeguards and network side is consistent to exist following problem:
GPS is not that the UE that does not have the GPS function can't adopt the GPS method alignment time to the necessarily requiring of UE;
Can not guarantee that UE one receives the time signal on the GPS surely even UE has the GPS function, just be difficult to receive satellite-signal indoor such as UE.
Adopt that the system time of local zone time that the time server mode guarantees that UE safeguards and network side is consistent to exist the following shortcoming:
Because the mutual link of newly-increased terminal and network needs to formulate complete terminal and ntp server and carries out mutual flow process;
Ntp server is on the basis of satisfying network side time synchronized demand, also can be towards terminal, because terminal number is huge, if great amount of terminals often all needs and ntp server communicates, impact to ntp server is big, if need the UE that communicates by letter and network measurement equipment (such as the base station) too much in the same time, may cause the NTP system crash;
Extensibility a little less than, if the non-ntp server of following adopted provides system time information, then terminal and corresponding flow process all need be made amendment;
Robustness is relatively poor, and the reliability of ntp server can become the bottleneck of whole network reliability, in case ntp server owing to increasing of UE number collapsed, then other network equipments also can't carry out time synchronized.
Summary of the invention
The embodiment of the invention provides a kind of temporal information sending method and base station, the scheme of the transmitting system time that is used to provide reliable, easy.
A kind of temporal information sending method, this method comprises:
Network side obtains system time information;
Send described system time information by descending transmission channel to terminal.
A kind of radio network controller, this radio network controller comprises:
Time acquisition unit is used to obtain the system time information of network side;
The time delivery unit is used for sending described system time information to base station, sends described system time information by descending transmission channel to terminal with the indication base station.
A kind of base station, this base station comprises:
The packet receiving element is used to receive the packet that comprises system time information that radio network controller is sent;
The signaling transmitting element is used for carrying the signaling message of described system time information by the descending transmission channel of this base station and terminal room to the terminal transmission.
Among the present invention, network side by descending transmission channel to the terminal transmitting system time, do not need the requirement terminal to possess the GPS function, do not need to increase yet or change terminal and ntp server carries out mutual flow process, can be to the terminal transmitting system time of any connecting system; The also problem that does not exist the NTP system crash to cause system time to can not get sending has reached the purpose of reliable easy transmitting system time.
The embodiment of the invention provides also a kind of method for synchronizing time, wireless communication system and terminal, and the terminal that is used to provide reliable, easy is obtained system time and utilized this system time to carry out the scheme of time calibration.
A kind of method for synchronizing time, this method comprises:
Terminal receives the system time information of network side transmitted in descending transmission channel;
According to described system time information the terminal local zone time is calibrated, and calibration back terminal local zone time keeps synchronous with system time.
A kind of wireless communication system, this system comprises:
The network equipment is used for by the system time information of descending transmission channel to terminal transmission network side;
Terminal is used for receiving described system time information in described descending transmission channel, and according to this system time information the terminal local zone time is calibrated, and makes that calibration back terminal local zone time and system time are synchronous.
A kind of terminal, this terminal comprises:
The time receiving element is used for the system time information in descending transmission channel reception network side transmitted;
Time calibration, the unit was used for according to described system time information the terminal local zone time being calibrated, and calibration back terminal local zone time keeps synchronous with system time.
Among the present invention, terminal receives the system time that network side sends in descending transmission channel, according to this system time the terminal local zone time is calibrated, and calibration back terminal local zone time keeps synchronous with system time.As seen, adopt the present invention, do not need the requirement terminal to possess the GPS function, also do not need to increase or change terminal and ntp server carries out mutual flow process, it is synchronous that the terminal of any connecting system all can obtain the system time line time of going forward side by side; Do not exist the NTP system crash to cause terminal can't obtain system time and then can't synchronous problem of deadline yet, make acquisition system time that terminal can be reliable, easy and realize with system time synchronously.
Description of drawings
The method flow schematic diagram that Fig. 1 provides for the embodiment of the invention;
The system configuration schematic diagram that Fig. 2 provides for the embodiment of the invention;
The structural representation of the radio network controller that Fig. 3 provides for the embodiment of the invention;
The architecture of base station schematic diagram that Fig. 4 provides for the embodiment of the invention;
The terminal structure schematic diagram that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to provide a kind of reliable, easy terminal to obtain system time and to utilize this system time to carry out the scheme of time calibration, the embodiment of the invention provides a kind of temporal information to send and method for synchronizing time, in this method, network side sends to terminal by descending transmission channel with system time information, and terminal is calibrated the terminal local zone time according to this system time information.System time among the present invention is meant the network side time of communication system.
Referring to Fig. 1, the temporal information that the embodiment of the invention provides sends and method for synchronizing time, specifically may further comprise the steps:
Step 10: network side by descending transmission channel to terminal transmitting system temporal information;
Step 11: terminal receives the system time information that send the base station in descending transmission channel, and according to this system time information the terminal local zone time is calibrated, and makes that calibration back terminal local zone time and system time are synchronous.
In the step 10, network side can pass through high speed descending sharing channel (HS-DSCH) to terminal transmitting system temporal information, and corresponding, terminal is in HS-DSCH receiving system temporal information in the step 11;
Network side can also pass through forward access channel (FACH) to terminal transmitting system temporal information, and corresponding, terminal is in FACH receiving system temporal information in the step 11.
By HS-DSCH during to terminal transmitting system temporal information, concrete implementation can adopt following two kinds at network side:
First kind: at network side, at first, Radio Resource control (RRC) signaling that radio network controller (RNC) will comprise system time information sends the base station to, the base station sends the shared control channel (HS-SCCH) of the HS-DSCH that carries time Radio Network Temporary Identifier (T-RNTI) to terminal, then, the base station RRC signaling that will carry system time information sends to terminal by HS-DSCH; This T-RNTI is the predefined RNTI that system time sends that is used for.In end side, terminal receives the RRC signaling of carrying system time information from HS-DSCH after listening to the HS-SCCH that carries this T-RNTI.Here, because the transmission of HS-SCCH and HS-DSCH has fixing sequential relationship, therefore terminal can be determined that according to this sequential relationship the base station sends the time of HS-DSCH, thereby receive the RRC signaling of carrying system time information from HS-DSCH in this time after listening to HS-SCCH.
Second kind, the base station is carried the signaling message of system time information by HS-DSCH to the terminal transmission in predefined running time-frequency resource position; Accordingly, terminal is carried the signaling message of system time information in this running time-frequency resource position by the HS-DSCH reception.The information of this running time-frequency resource position can be pre-configured in the terminal, and also can be the base station sends to terminal by broadcast channel with the information of this running time-frequency resource position.
By FACH during to terminal transmitting system temporal information, specific implementation can be as follows at network side:
At network side, at first, the system broadcast message that RNC will comprise the radio frames sign of transmitting system temporal information sends the base station to, and system time information is carried in the RRC signaling, sends this RRC signaling to base station; This system broadcast message is broadcasted in the base station in the sub-district, the RRC signaling that will carry system time information then sends to terminal by FACH in the corresponding radio frames of this radio frames sign.In end side, after terminal receives the system broadcast message of base station transmission, read the radio frames sign of carrying in this system broadcast message, and in the corresponding radio frames of this radio frames sign, receive the RRC signaling of carrying system time information from FACH.
Here, system broadcast message can be carried one or more radio frames signs, terminal then receives the RRC signaling of carrying system time information from FACH in a radio frames of a radio frames sign correspondence, perhaps receive the RRC signaling of carrying system time information from FACH in the corresponding a plurality of radio frames of a plurality of radio frames signs.
After terminal receives system broadcast message, and receive from FACH and to carry before the RRC signaling of system time information, if terminal is in idle condition, then terminal need be set up RRC with network side and is connected, after RRC connected foundation, terminal connected the RRC signaling of carrying system time information from the FACH reception by this RRC.
After terminal is calibrated the terminal local zone time according to system time information, terminal can also be measured predefined measuring amount, and the measurement result that will carry current time information reports network equipment, and the network equipment utilization is carried the measurement result of temporal information and carried out network planning adjustment or optimization work.
Among the present invention, the time granularity of system time can be 1 millisecond.This system time specifically can be the clock time of the subframe correspondence of transmitting system temporal information.
Below the present invention is specifically described:
Because the emission of the physical signalling of TDD system is a unit with radio frames (radio frame), each radio frames is made up of 10 subframes, and each subframe continues 1ms.Therefore, TDD system time precision is at least 1ms.Below said system time be meant clock time, promptly comprise Year/Month/Day and the time/minute/second/millisecond, precision is 1ms.The present invention proposes the method that terminal in two kinds of TDD systems is obtained system time, and this TDD system comprises TD SDMA (TD-SCDMA) and follow-up evolution (TD-HSDPA/HSUPA/HSPA+) system etc.
Method one: transmitting system temporal information on HS-DSCH.
Insert in (HSDPA) and the follow-up evolution system thereof in the TDD high speed downlink packet, high speed descending sharing channel (HS-DSCH) and shared control channel (HS-SCCH) have been introduced, support the downlink signaling information of HS-DSCH to be transmitted by HS-SCCH, the UE of all connected states in the network can receive this two channels.This channel promptly can transmit special-purpose signaling and data, also can be used for the public information of transfer system.In order to be implemented in the function that transmits system time information on this channel, need to increase a general overall identification, for example, but called after time Radio Network Temporary Identifier (Time-Radio NetworkTemporary Identity, T-RNTI).This T-RNTI be general, be exclusively used in indication UE receiving system temporal information.
T-RNTI transmits in the HS-SCCH channel, is used to indicate the terminal of all connected states all will receive medium access control (MAC) packet that the HS-DSCH corresponding with HS-SCCH goes up the system time information of carrying that transmits.When the UE that is in connected state in the network when listening to HS-SCCH, if be decoded to T-RNTI from this HS-SCCH, then all are in the UE of connected state all according to network configuration in advance, receive the HS-DSCH of HS-SCCH correspondence therewith, read the MAC packet that HS-DSCH goes up carrying, from this MAC packet, obtain system time information, and the local zone time that utilizes this system time information calibration UE to safeguard.
Further can reconfigure one and take the fixedly HS-DSCH of running time-frequency resource, the fixedly running time-frequency resource that the base station takies at this HS-DSCH is to terminal transmitting system temporal information.The running time-frequency resource positional information that HS-DSCH takies can be arranged in advance by base station and terminal, also can be that the base station sends to UE by broadcast channel with this running time-frequency resource positional information.
Adopt this method, be in the UE of all states, comprise the UE of free time (IDLE) state that is in, cell private channel (CELL_DCH) state, cell forward access channel (CELL_FACH) state, cell paging channel (CELL_PCH) state, can be from HS-DSCH receiving system temporal information.
Method two: transmitting system temporal information on FACH.
In TD-SCDMA and follow-up evolution system thereof, FACH is a common down channel, and the transmission position of FACH is to send to UE by system broadcast message.In order on FACH, to transmit system time information, need be in system broadcast message, carry the identification information of the radio frames that the base station utilized by FACH transmitting system temporal information, on the FACH of this radio frames channel, do not transmit other signaling or user data, transfer system temporal information, the system time information that different certainly radio frames sends can be different.Here said radio frames identification information can provide with System Frame Number (SFN) form, and in the TDD system, the span of SFN is [0,65535].
In order on FACH, to transmit system time information, also need to increase the RRC signaling message, this message is used to carry system time information.
When adopting this method, be identified for the SFN of the radio frames of transmitting system temporal information by radio network controller (RNC), according to the corresponding relation between the system time of SFN and reality, can determine the system time of this SFN correspondence, and structure comprises the RRC signaling message of this system time, send this RRC signaling message to base station then, after the RRC signaling message is received in the base station, on the FACH of the radio frames of this SFN correspondence of RNC appointment, send this RRC signaling message to terminal.
UE in the network obtains the radio frames identification information of base station by FACH transmitting system temporal information from system broadcast message.If UE has been in connected state, and need obtain system time, then UE reads the system time information on the FACH in this radio frames position.If UE is in the IDLE state, then UE will set up RRC earlier and connects, and is connected this radio frames position by RRC then and reads system time information on the FACH, after the reading system temporal information, can discharge RRC and connect.
Network side can dispose one or more radio frames and be used for the transmitting system temporal information, as the radio frames that disposes SFN=100 and SFN=30000 is used for the transmitting system temporal information, then the base station can be periodically be transmitting system temporal information on 100 and 30000 the radio frames at SFN.
Adopt this method, the UE that is in connection status can receive system time information from FACH, and the UE that is in connection status comprises the UE of the CELL_FACH state that is in, CELL_DCH state and CELL_PCH state.
The present invention will be described with specific embodiment below:
Embodiment one:
In the present embodiment, transmitting system temporal information on HS-DSCH, specific as follows:
The definition of step S01:TDD system side is used to indicate the T-RNTI of receiving system time;
Step S02: radio network controller is included in the system time of radio frames SFN=2396 correspondence in the RRC signaling message and sends the base station to, to be radio network controller calculate according to the mapping relations of SFN and system time this system time information, it is the initial x time of the radio frames of SFN=2396, should be 2009-10-20 constantly for example, 10: 28: 35 535 milliseconds
Base station in the step S03:TDD system sends the Downlink Control Information that comprises T-RNTI by HS-SCCH in the radio frames of SFN=2394; The UE that is in connection status in the sub-district of base station decodes T-RNTI from HS-SCCH, prepares receiving system temporal information on the HS-DSCH of correspondence;
Step S04: the RRC signaling message of system time information is carried by the HS-DSCH transmission in the base station in the radio frames of SFN=2396;
Step S05: the UE that is in connection status in the sub-district of base station in the radio frames of SFN=2396 from the HS-DSCH reading of data, obtain system time information, and utilize this system time information to calibrate local zone time, for example, in the initial moment of the radio frames of SFN=2400, time of local clock is added 40 milliseconds (because a radio frames length is 10 milliseconds), to reach the time of upgrading local clock, local zone time after the renewal is 2009-10-20,10: 28: 35 575 milliseconds.
After this, the local zone time of UE and system time reach synchronous.
Embodiment two:
In the present embodiment, the transmitting system time on FACH, be in the UE reading system temporal information of connection status, specific as follows:
RNC in the step S11:TDD system carries SFN3000 in the system broadcast message of sub-district, with the expression network side will be in the radio frames of SFN=3000 the transmitting system temporal information, RNC sends this system broadcast message to base station;
Step S12: this system broadcast message is broadcasted in the base station in the sub-district, and the UE that is in connection status in the sub-district has obtained SFN3000 radio frames identification information from this system broadcast message, knows network transmitting system temporal information on the radio frames of SFN=3000;
Step S13:RNC is in the moment of the radio frames of SFN=2998, mapping relations by SFN and system time, calculate the system time of the radio frames correspondence of SFN=3000, for example this system time is 2009-10-20,14: 5: 24 270 milliseconds, structure comprises the RRC signaling message of this system time, this RRC signaling message is mapped to the MAC packet of FACH after, give the base station by Iub interface with this MAC data packet delivery;
Step S14: after the base station receives the MAC packet that comprises system time information, in the radio frames of SFN=3000, send this MAC packet by FACH;
Step S15: the UE that is in connection status in the base station cell receives FACH in the radio frames of SFN=3000, obtains system time information, and is benchmark with this system time information, upgrades local zone time.
After this, the local zone time of UE and system time reach synchronous.
Embodiment three:
In the present embodiment, transmitting system temporal information on FACH, the UE that is in idle condition obtains system time information after setting up the RRC connection, specific as follows:
RNC in the step S21:TDD system carries SFN3000 in the system broadcast message of sub-district, with the expression network side will be in the radio frames of SFN=3000 the transmitting system temporal information, RNC sends this system broadcast message to base station;
Step S22: this system broadcast message is broadcasted in the base station in the sub-district, and the UE that is in idle condition in the sub-district has obtained SFN3000 radio frames identification information from this system broadcast message, knows network transmitting system temporal information on the radio frames of SFN=3000;
Step S23:RNC is in the moment of the radio frames of SFN=2998, mapping relations by SFN and system time, calculate the system time of the radio frames correspondence of SFN=3000, for example this system time is 2009-10-20,14: 5: 24 270 milliseconds, structure comprises the RRC signaling message of this system time, and this RRC signaling message secondary common control physical channel (CCCH) is mapped to FACH, and the data packet delivery after will shining upon by Iub interface is given the base station.
Step S24: after the base station receives the packet that comprises system time information, in the radio frames of SFN=3000, send this packet by FACH;
Step S25: the Idle state UE in the base station cell begins to initiate to insert at random from the radio frames of SFN=2520, and finishes the RRC establishment of connection when SFN=2610.UE receives FACH on the radio frames of SFN=3000, obtain system time information, and as benchmark, upgrade the local zone time of oneself.
After this, the local zone time of UE and system time reach synchronous.
Referring to Fig. 2, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises:
The network equipment 20 is used for by the system time information of descending transmission channel to terminal transmission network side;
The described network equipment 20 is used for:
By high speed downlink shared channel HS-DSCH or forward access channel FACH to terminal transmitting system temporal information;
Accordingly, described terminal 21 is used for:
Receive described system time information at described HS-DSCH or described FACH.
The described network equipment 20 comprises radio network controller 201 and base station 202, wherein:
Accordingly, described terminal 21 is used for:
After listening to the HS-SCCH that carries described T-RNTI, receive the RRC signaling of carrying described system time information from described HS-DSCH.
Described base station 202 is used for:
In predefined running time-frequency resource position, carry the signaling message of system time information to the terminal transmission by described HS-DSCH;
Accordingly, described terminal 21 is used for:
In described running time-frequency resource position, carry the signaling message of described system time information by described HS-DSCH reception.
Described radio network controller 201 is used for:
The system broadcast message that will comprise the radio frames sign of transmitting system temporal information sends the base station to, and described system time information is carried in the radio resource control RRC signaling, sends this RRC signaling to base station;
Described base station 202 is used for:
In the sub-district, after the described system broadcast message of broadcasting, in the corresponding radio frames of described radio frames sign, described RRC signaling is sent to terminal by FACH;
Accordingly, described terminal 21 is used for:
After terminal receives described system broadcast message, read the radio frames sign of carrying in this system broadcast message; In the corresponding radio frames of described radio frames sign, receive the RRC signaling of carrying described system time information from described FACH.
Described terminal 21 also is used for:
After receiving described system broadcast message, and receive from described FACH and to carry before the RRC signaling of described system time information,, then set up RRC and be connected with network side if determine that this terminal is in idle condition; Connect the RRC signaling of carrying described system time information from described FACH reception by the described RRC that sets up.
Described terminal 21 also is used for:
After terminal is calibrated the terminal local zone time according to this system time information, predefined measuring amount is measured, and the measurement result that will carry current time information reports the base station.
Referring to Fig. 3, the embodiment of the invention also provides a kind of radio network controller, can be applied in the above-mentioned wireless communication system, and this radio network controller comprises:
This radio network controller also comprises:
Frame identification radio unit 32, the system broadcast message that is used for comprising the radio frames sign of transmitting system temporal information sends the base station to, broadcasts this system broadcast message with the indication base station in the sub-district.
Referring to Fig. 4, the embodiment of the invention also provides a kind of base station, can be applied in the above-mentioned wireless communication system, and this base station comprises:
Signaling transmitting element 41 is used for carrying the signaling message of described system time information by the descending transmission channel of this base station and terminal room to the terminal transmission.
Described signaling transmitting element 41 comprises first transmitting element and/or second transmitting element, wherein:
Described first transmitting element is used for by high speed downlink shared channel HS-DSCH to terminal transmitting system temporal information;
Described second transmitting element is used for by forward access channel FACH to terminal transmitting system temporal information.
Described first transmitting element is used for:
Send the shared control channel HS-SCCH of the HS-DSCH that carries time Radio Network Temporary Identifier T-RNTI to terminal after, described system time information is sent to terminal by HS-DSCH; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
In predefined running time-frequency resource position, by described HS-DSCH to terminal transmitting system temporal information.
Described second transmitting element is used for:
After the system broadcast message of radio frames sign was carried in broadcasting in the sub-district, the signaling message that will carry described system time information by FACH in the corresponding radio frames of described radio frames sign sent to terminal.
Referring to Fig. 5, the embodiment of the invention also provides a kind of terminal, can be applied in the above-mentioned wireless communication system, and this terminal comprises:
Time calibration, the unit 51, be used for according to described system time information the terminal local zone time being calibrated, and calibration back terminal local zone time kept synchronous with system time.
Described time receiving element 50 comprises first receiving element and/or second receiving element, wherein:
Described first receiving element is used for, and receives described system time information in high speed downlink shared channel HS-DSCH;
Described first receiving element is used for, and receives described system time information at forward access channel FACH.
Described first receiving element is used for:
Behind the HS-SCCH of the time of the carrying Radio Network Temporary Identifier T-RNTI that listens to the network side transmission, receive described system time information from described HS-DSCH; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
In predefined running time-frequency resource position, receive described system time information by described HS-DSCH.
Described second receiving element is used for:
After receiving the system broadcast message of the radio frames sign of carrying network side transmitting system temporal information of network side transmitted, read the radio frames sign of carrying in this system broadcast message; In the corresponding radio frames of described radio frames sign, receive described system time information from described FACH.
This terminal also comprises:
Connect and set up unit 52, be used for after described second receiving element receives described system broadcast message,, then set up RRC and be connected with network side if determine that this terminal is in idle condition;
Accordingly, described second receiving element is used for:
Receive described system time information by the described RRC connection of setting up from described FACH.
This terminal also comprises:
Time reports unit 53, be used for after described time calibration, the unit was calibrated the terminal local zone time according to system time information predefined measuring amount being measured, and the measurement result that will carry current time information reports the base station.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, network side by descending transmission channel to the terminal transmitting system time, terminal receives the system time that the base station sends in this descending transmission channel, according to this system time the terminal local zone time is calibrated, and terminal local zone time and system time keep synchronous after the calibration. As seen, adopt the present invention, do not need the requirement terminal to possess the GPS function, also do not need to increase or change terminal and ntp server carries out mutual flow process, it is synchronous that the terminal of any connecting system all can obtain the system time line time of going forward side by side; Do not exist the NTP system crash to cause terminal can't obtain system time and then can't synchronous problem of deadline yet so that the acquisition system that terminal can be reliable, the easy system time and realize with system time synchronously.
As long as simultaneously, the present invention does not have specific (special) requirements to the hardware configuration of UE, does not increase equipment cost, and having in the situation of network connection, can accomplish, is not subjected to the restriction of geographical environment. In addition, adopt the present invention, the enhancing that only needs standard agreement is done slightly just can realize, does not need special-purpose server, is conducive to reduce the cost of operator.
After terminal local zone time and system time are synchronous, terminal is when the measurement result information that reports measuring amount, can be with together reporting network side with the synchronous terminal local zone time of system time, so that network side can utilize correct temporal information to carry out the comparatively accurately network optimization.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention. Like this, if of the present invention these are revised and modification belongs to the range of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (23)
1. a temporal information sending method is characterized in that, this method comprises:
Network side obtains system time information;
Send described system time information by descending transmission channel to terminal.
2. the method for claim 1 is characterized in that, described descending transmission channel is:
High speed downlink shared channel HS-DSCH, or forward access channel FACH.
3. method as claimed in claim 2 is characterized in that, described network side comprises to terminal transmitting system temporal information by HS-DSCH:
The radio resource control RRC signaling that radio network controller will comprise system time information sends the base station to; The base station sends to terminal with described RRC signaling by HS-DSCH after sending the shared control channel HS-SCCH of the HS-DSCH that carries time Radio Network Temporary Identifier T-RNTI to terminal; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
The base station is carried the signaling message of system time information by described HS-DSCH to the terminal transmission in predefined running time-frequency resource position.
4. method as claimed in claim 2 is characterized in that, described network side comprises to terminal transmitting system temporal information by FACH:
The system broadcast message that radio network controller will comprise the radio frames sign of transmitting system temporal information sends the base station to, and described system time information is carried in the radio resource control RRC signaling, sends this RRC signaling to base station;
Described system broadcast message is broadcasted in the base station in the sub-district after, in the corresponding radio frames of described radio frames sign, described RRC signaling is sent to terminal by described FACH.
5. a method for synchronizing time is characterized in that, this method comprises:
Terminal receives the system time information of network side transmitted in descending transmission channel;
According to described system time information the terminal local zone time is calibrated, and calibration back terminal local zone time keeps synchronous with system time.
6. method as claimed in claim 5 is characterized in that, described descending transmission channel is:
High speed downlink shared channel HS-DSCH, or forward access channel FACH.
7. method as claimed in claim 6 is characterized in that, described terminal comprises in the system time information that described HS-DSCH receives network side transmitted:
Terminal receives the RRC signaling of carrying described system time information from described HS-DSCH behind the HS-SCCH of the time of the carrying Radio Network Temporary Identifier T-RNTI that listens to the network side transmission; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
Terminal is carried the signaling message of described system time information in predefined running time-frequency resource position by described HS-DSCH reception.
8. method as claimed in claim 6 is characterized in that, described terminal comprises in the system time information that described FACH receives network side transmitted:
Terminal reads the radio frames sign of carrying in this system broadcast message after the system broadcast message of the radio frames sign of carrying network side transmitting system temporal information that receives network side transmitted; In the corresponding radio frames of described radio frames sign, receive the RRC signaling of carrying described system time information from described FACH.
9. method as claimed in claim 8 is characterized in that, after described terminal receives described system broadcast message, and receives from described FACH and to carry before the RRC signaling of described system time information, and this method further comprises:
If terminal is in idle condition, then terminal is set up RRC with network side and is connected;
Described terminal receives the RRC signaling of carrying described system time information from described FACH and comprises:
Terminal connects the RRC signaling of carrying described system time information from described FACH reception by the described RRC that sets up.
10. as arbitrary described method among the claim 5-9, it is characterized in that after terminal was calibrated the terminal local zone time according to this system time information, this method further comprised:
Described terminal is measured predefined measuring amount, and the measurement result that will carry current time information reports the base station.
11. a wireless communication system is characterized in that, this system comprises:
The network equipment is used for by the system time information of descending transmission channel to terminal transmission network side;
Terminal is used for receiving described system time information in described descending transmission channel, and according to this system time information the terminal local zone time is calibrated, and makes that calibration back terminal local zone time and system time are synchronous.
12. a radio network controller is characterized in that, this radio network controller comprises:
Time acquisition unit is used to obtain the system time information of network side;
The time delivery unit is used for sending described system time information to base station, sends described system time information by descending transmission channel to terminal with the indication base station.
13. radio network controller as claimed in claim 12 is characterized in that, this radio network controller also comprises:
The frame identification radio unit, the system broadcast message that is used for comprising the radio frames sign of transmitting system temporal information sends the base station to, broadcasts this system broadcast message with the indication base station in the sub-district.
14. a base station is characterized in that, this base station comprises:
The packet receiving element is used to receive the packet that comprises system time information that radio network controller is sent;
The signaling transmitting element is used for carrying the signaling message of described system time information by the descending transmission channel of this base station and terminal room to the terminal transmission.
15. base station as claimed in claim 14 is characterized in that, described signaling transmitting element comprises first transmitting element and/or second transmitting element, wherein:
Described first transmitting element is used for carrying the signaling message of system time information by high speed downlink shared channel HS-DSCH to the terminal transmission;
Described second transmitting element is used for carrying the signaling message of system time information by forward access channel FACH to the terminal transmission.
16. base station as claimed in claim 15 is characterized in that, described first transmitting element is used for:
Send the shared control channel HS-SCCH of the HS-DSCH that carries time Radio Network Temporary Identifier T-RNTI to terminal after, the signaling message that carries described system time information is sent to terminal by HS-DSCH; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
In predefined running time-frequency resource position, carry the signaling message of system time information to the terminal transmission by described HS-DSCH.
17. base station as claimed in claim 15 is characterized in that, described second transmitting element is used for:
After the system broadcast message of radio frames sign was carried in broadcasting in the sub-district, the signaling message that will carry described system time information by FACH in the corresponding radio frames of described radio frames sign sent to terminal.
18. a terminal is characterized in that, this terminal comprises:
The time receiving element is used for the system time information in descending transmission channel reception network side transmitted;
Time calibration, the unit was used for according to described system time information the terminal local zone time being calibrated, and calibration back terminal local zone time keeps synchronous with system time.
19. terminal as claimed in claim 18 is characterized in that, described time receiving element comprises first receiving element and/or second receiving element, wherein:
Described first receiving element is used for, and receives described system time information in high speed downlink shared channel HS-DSCH;
Described first receiving element is used for, and receives described system time information at forward access channel FACH.
20. terminal as claimed in claim 19 is characterized in that, described first receiving element is used for:
Behind the HS-SCCH of the time of the carrying Radio Network Temporary Identifier T-RNTI that listens to the network side transmission, receive described system time information from described HS-DSCH; Described T-RNTI is the predefined RNTI that system time sends that is used for; Perhaps,
In predefined running time-frequency resource position, receive described system time information by described HS-DSCH.
21. terminal as claimed in claim 19 is characterized in that, described second receiving element is used for:
After receiving the system broadcast message of the radio frames sign of carrying network side transmitting system temporal information of network side transmitted, read the radio frames sign of carrying in this system broadcast message; In the corresponding radio frames of described radio frames sign, receive described system time information from described FACH.
22. terminal as claimed in claim 21 is characterized in that, this terminal also comprises:
Connect and set up the unit, be used for after described second receiving element receives described system broadcast message,, then set up RRC and be connected with network side if determine that this terminal is in idle condition;
Described second receiving element is used for:
Receive described system time information by the described RRC connection of setting up from described FACH.
23., it is characterized in that this terminal also comprises as arbitrary described terminal among the claim 18-22:
Time reports the unit, be used for after described time calibration, the unit was calibrated the terminal local zone time according to system time information predefined measuring amount being measured, and the measurement result that will carry current time information reports the base station.
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| CN200910238669.3A CN102083194B (en) | 2009-11-30 | 2009-11-30 | Method, system and equipment for sending time information and synchronizing time |
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| CN200910238669.3A CN102083194B (en) | 2009-11-30 | 2009-11-30 | Method, system and equipment for sending time information and synchronizing time |
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