CN106793057A - Time advance for cellular network communication system determines method and device - Google Patents
Time advance for cellular network communication system determines method and device Download PDFInfo
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- CN106793057A CN106793057A CN201611259456.5A CN201611259456A CN106793057A CN 106793057 A CN106793057 A CN 106793057A CN 201611259456 A CN201611259456 A CN 201611259456A CN 106793057 A CN106793057 A CN 106793057A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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Abstract
A kind of time advance for cellular network communication system determines method and device, and methods described comprises the following steps：Receive the base station position information collection that target BS sends, the base station position information collection at least base station position information including the target BS；Determine the terminal positional information of user terminal；Base station position information and the terminal positional information according to the target BS, determine the distance between the user terminal and the target BS；The time advance is determined according to the distance.By the present invention provide technical scheme can preferably adapt to a new generation radio honeycomb network communication system so that more precisely, timely determine time advance.
Description
Technical field
The present invention relates to the communications field, method is determined more particularly to a kind of time advance for cellular network communication system
And device.
Background technology
In radio honeycomb network communication system, each terminal (i.e. user equipment, User Equipment, abbreviation UE) arrives base station
The distance of (Node-B, abbreviation NB) is different, and the downstream signal for causing same base station to send can be produced when reaching each user equipment
The time difference.On the other hand, because existing radio honeycomb network communication system specifies, retention time synchronization is needed between each base station, and
And require that terminal-pair target BS downstream signal keeps synchronous, while record synchronous time difference of adjacent base station downstream signal with prepare with
When be switched on the more preferable base station of signal.If then each terminal sends upward signal on the basis of lock in time, by difference away from
From and different up transfer delays, the upward signal that each terminal sends eventually arrives at the time difference produced during base station easily to be caused respectively
Signal interference between upward signal.
Current radio honeycomb network communication system typically carrys out solution never using time advance (Time Advance, abbreviation TA)
Issuable time difference problem when sending upward signal to base station with terminal.For example, for the terminal in access procedure, base station
Time advance is obtained by the accidental access signal of measuring terminals transmission, and end to is sent the time advance by signaling
End.Again for example, for being in radio resource control (Radio Resource Control, abbreviation RRC) connection shape
The terminal of state, base station can test constantly the upward signal of terminal is sent to obtain time advance, and transmitted again by signaling
To terminal.
And with the research and development of the 5th generation radio honeycomb network communication system, increased inactive (RRC_INACTIVE) shapes of RRC newly
State, terminal in this condition can on the premise of RRC connection (RRC_ACTIVE) states are not entered, directly transmit data to
Base station.The terminal data under RRC disabled states sends at present has Three models to be in talking stage：Four step Stochastic accessings
During directly transmit and directly transmit in data, two step random access procedures data and direct using scheduling method resource is exempted from
Send data.For the first pattern, still use for reference prior art and obtain time advance in the random access procedure.But for rear
Both of which, due to terminal need not enter RRC connection status, cause base station cannot using existing technical scheme to determine when
Between in advance, be unfavorable for the further development of radio honeycomb network communication system.
The content of the invention
Present invention solves the technical problem that being that existing time advance acquisition scheme is not suitable for new generation of wireless Cellular Networks
Communication system.
In order to solve the above technical problems, a kind of embodiment of the present invention time advance for cellular network communication system of offer is true
Determine method, comprise the following steps：The base station position information collection that target BS sends is received, the base station position information collection is at least wrapped
Include the base station position information of the target BS；Determine the terminal positional information of user terminal；According to the base of the target BS
Station location information and the terminal positional information, determine the distance between the user terminal and the target BS；According to described
Distance determines the time advance.
Optionally, the base station position information collection is contained in the system information that the target BS sends, according to described
Distance determines that the time advance includes：After spread speed by the distance divided by the system information, multiplied by with single week
The interim interaction times with the target BS, to obtain the time advance.
Optionally, the spread speed of the system information is the light velocity.
Optionally, with the interaction times of the target BS it is 2 times in the signal period.
Optionally, the terminal positional information for determining user terminal includes：Obtained from the positioning element of the user terminal
Take the terminal positional information.
Optionally, the base station position information collection also base station location including the multiple base stations neighbouring with the target BS
Information, the terminal positional information of the determination user terminal includes：Base station location letter according at least three base stations for receiving
Breath, and the respective synchronous reference signal at least three base station reaches the time difference of the user terminal, determines the end
End position information.
Optionally, the base station position information of at least three base stations that the basis is received, and at least three base
Respective synchronous reference signal of standing reaches the time difference of the user terminal, determines that the terminal positional information includes：Obtain three
The respective synchronous reference signal of the base station position information of individual base station and three base stations reaches the time of the user terminal
Difference；The respective synchronous reference signal of base station position information and three base stations based on three base stations reaches the use
The time difference of family terminal, the terminal positional information is determined by triangle polyester fibre.
Optionally, three base stations include the target BS.
Optionally, the base station position information of at least three base stations that the basis is received, and at least three base
Respective synchronous reference signal of standing reaches the time difference of the user terminal, determines that the terminal positional information includes：It is determined that many
Individual group of base stations, each group of base stations includes three base stations；For each group of base stations, based on three bases of base station in the group of base stations
The respective synchronous reference signal of station location information and three base stations reaches the time difference of the user terminal, by triangle
Positioning determines the terminal positional information；Base station position information and the terminal positional information according to the target BS, really
Fixed distance between the user terminal and the target BS includes：For each group of base stations, according to the base of the target BS
Station location information and the terminal positional information determined based on the group of base stations, it is determined that corresponding to the candidate of the group of base stations
Distance；The corresponding candidate distance of each group of base stations is added and averaged, to obtain the user terminal with the target
Distance between base station.
The embodiment of the present invention also provides a kind of time advance determining device for cellular network communication system, including：Receive
Module, the base station position information collection for receiving target BS transmission, the base station position information collection at least includes the target
The base station position information of base station；First determining module, the terminal positional information for determining user terminal；Second determining module,
For the base station position information according to the target BS and the terminal positional information, determine the user terminal with the mesh
Distance between mark base station；3rd determining module, for determining the time advance according to the distance.
Optionally, the base station position information collection is contained in the system information that the target BS sends, and the described 3rd
Determining module includes：First calculating sub module, for the spread speed by the distance divided by the system information after, multiplied by with
With the interaction times of the target BS in signal period, to obtain the time advance.
Optionally, the spread speed of the system information is the light velocity.
Optionally, with the interaction times of the target BS it is 2 times in the signal period.
Optionally, first determining module includes：Acquisition submodule, for being obtained from the positioning element of the user terminal
Take the terminal positional information.
Optionally, the base station position information collection also base station location including the multiple base stations neighbouring with the target BS
Information, first determining module includes：First determination sub-module, for the base station position according at least three base stations for receiving
Confidence ceases, and the respective synchronous reference signal at least three base station reaches the time difference of the user terminal, determines institute
State terminal positional information.
Optionally, first determination sub-module includes：Acquiring unit, for obtaining three base station position informations of base station
And the respective synchronous reference signal in three base stations reaches the time difference of the user terminal；First determining unit, is used for
The respective synchronous reference signal of base station position information and three base stations based on three base stations reaches the user
The time difference of terminal, the terminal positional information is determined by triangle polyester fibre.
Optionally, three base stations include the target BS.
Optionally, first determination sub-module includes：Second determining unit, for determining multiple group of base stations, Mei Yiji
Group of standing includes three base stations；3rd determining unit, for each group of base stations, based on three base stations of base station in the group of base stations
The respective synchronous reference signal of positional information and three base stations reaches the time difference of the user terminal, fixed by triangle
Position determines the terminal positional information；Second determining module includes：Second determination sub-module, for each group of base stations, root
The terminal positional information determined according to the base station position information of the target BS and based on the group of base stations, it is determined that correspondence
In the candidate distance of the group of base stations；Second calculating sub module, for the corresponding candidate distance of each group of base stations to be added and
Average, to obtain the distance between the user terminal and the target BS.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantages that：
The base station position information collection that includes in the system information that target BS sends is received, with from the base station position information
Concentrate the base station position information for obtaining the target BS, and it is determined that after the terminal positional information of user terminal, based on described
Base station position information and terminal positional information determine the distance between the target BS and the user terminal, and then determine the time
In advance.Than in the prior art by informing the scheme of user terminal after base station side calculating acquisition time advance again, due to new one
For in cellular network communication system, it is allowed to which user terminal is not entering radio resource control (Radio Resource
Control, abbreviation RRC) directly send data to target BS on the premise of connection status, therefore the embodiment of the present invention technology
Scheme determines time advance by broadcast message of the subscriber terminal side based on target BS, reduces user terminal and target BS
Between signaling consumption, it is also possible to preferably adapt to the consensus standard of cellular network communication system of new generation.
Further, the base station position information collection is contained in the system information that the target BS sends, and the present invention is real
Apply the technical scheme of example by the distance between the target BS and the user terminal divided by the system information spread speed
Afterwards, multiplied by with the interaction times in signal period with the target BS, to obtain the time advance so that described single
The user terminal can mutually transmit data with target BS by correct scheduling in cycle.
Brief description of the drawings
Fig. 1 is that a kind of time advance for cellular network communication system of the first embodiment of the present invention determines the stream of method
Cheng Tu；
Fig. 2 is that a kind of time advance for cellular network communication system of the second embodiment of the present invention determines the stream of method
Cheng Tu；
Fig. 3 is that a kind of time advance for cellular network communication system of the third embodiment of the present invention determines the stream of method
Cheng Tu；
Fig. 4 is to determine that the scene of the terminal positional information of user terminal is illustrated using the method for third embodiment of the invention
Figure；
Three respective synchronous reference signals in base station reach user's end when Fig. 5 is the method using third embodiment of the invention
The time difference schematic diagram at end；
Fig. 6 is a kind of knot of time advance determining device for cellular network communication system of the fourth embodiment of the present invention
Structure schematic diagram.
Specific embodiment
It will be appreciated by those skilled in the art that as background technology is sayed, existing time advance (Time Advance, abbreviation TA)
Determine that scheme still is limited to be performed by base station side, it is necessary to when the accidental access signal that is sent according to user terminal of base station is to determine
Between in advance (or, it is necessary to be under radio resource control connection status in user terminal and base station, constantly measured by base station
The upward signal of user terminal determines time advance), user terminal is then informed again, so that user terminal can be correct
Timing node sends data.But, the radio honeycomb network communication system of a new generation introduces new data transmission mechanism, it is allowed to use
Family terminal directly sends data in the case where radio resource control connection status is not entered to base station, and this results in base
Stand to be produced with user terminal before data are received and interact, also cannot just determine time advance and inform user's end
End.
In order to solve the above-mentioned technical problem, the embodiment of the present invention in the system information for receiving target BS transmission by including
Base station position information collection, obtain the base station position information of the target BS to be concentrated from the base station position information, and
After determining the terminal positional information of user terminal, the target base is determined based on the base station position information and terminal positional information
Stand and the distance between the user terminal, and then determine time advance.It will be appreciated by those skilled in the art that the skill of the embodiment of the present invention
Art scheme determines time advance by broadcast message of the subscriber terminal side based on target BS, reduces user terminal and target base
Signaling consumption between standing, it is also possible to preferably adapt to the consensus standard of cellular network communication system of new generation.
It is understandable to enable above-mentioned purpose of the invention, feature and beneficial effect to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
Fig. 1 is that a kind of time advance for cellular network communication system of the first embodiment of the present invention determines the stream of method
Cheng Tu.Wherein, the cellular network communication system can include radio honeycomb network communication system.
Specifically, in the present embodiment, step S101 is first carried out, the base station position information that target BS sends is received
Collection, the base station position information collection at least base station position information including the target BS.More specifically, the base station position
Confidence breath collection is contained in the system information that the target BS sends.Further, the target BS can be
Or prepare and the base station of the user terminal interaction data.In a preference, when the user terminal wish with it is described
When target BS carries out data interaction (for example, the user terminal wishes to send data to the target BS), the user
Terminal can obtain the system information of its transmission by monitoring the broadcast channel of the target BS, to believe from the system
The base station position information of the target BS is obtained in breath.
Then step S102 is performed, the terminal positional information of user terminal is determined.More specifically, the user terminal can
Being the user equipment carried out data transmission using the cellular network communication system.Further, the terminal positional information
Position for representing the user terminal, it is possible to use built-in positioning element determines, such as using based on global positioning system
The positioning element of system (Global Positioning System, abbreviation GPS) determines, it is also possible to led using based on big-dipper satellite
The positioning element determination of boat system, or, the terminal positional information can also be determined by way of architecture.It is preferred that
Ground, the terminal positional information can be represented based on longitude and latitude, and described those skilled in the art are also dependent on being actually needed change
Go out more embodiments, this has no effect on technology contents of the invention.
Following execution step S103, base station position information and the terminal positional information according to the target BS,
Determine the distance between the user terminal and the target BS.Specifically, the distance can be the air line distance of point-to-point transmission,
Wherein, described 2 points are respectively the base station position information and the terminal positional information.Preferably, the distance is used to represent
Signal (for example, broadcast message, data etc.) transmits the signal transmission length to be passed through during to user terminal from target BS.
Step S104 is finally performed, the time advance is determined according to the distance.Specifically, the time advance is used for
Coordinate the data is activation opportunity of the user terminal so that the data can be with the target base when reaching the target BS
The clock synchronization stood.Preferably due to the distance can be used to indicate that signal between the target BS and user terminal
Signal transmission length, it is possible to which the signal exists based on the distance, the spread speed of the signal and in signal period
Interaction times between the target BS and user terminal determine the time advance.In a preference, will it is described away from
After the spread speed divided by the system information, multiplied by with the interaction times in signal period with the target BS, to obtain
Obtain the time advance.Preferably, the spread speed of the system information can be the light velocity.Preferably, in the signal period
It can be 2 times with the interaction times of the target BS.Those skilled in the art dissolve more realities also dependent on change is actually needed
Example is applied, be will not be described here.
In a change case of the present embodiment, the system in the step S101 can also be by the target BS
The user terminal is passed to by dedicated channel, for example, the target terminal can be according to itself configuration, it is determined that with unicast
Form sends the system information for including the base station position information collection to the user terminal.
By upper, using the scheme of first embodiment, the broadcast message of target BS can be based on come really by subscriber terminal side
Fix time in advance, reduce the signaling consumption between user terminal and target BS, it is also possible to preferably adapt to honeycomb of new generation
The consensus standard of network communication system so that when the user terminal can press correct with target BS in the signal period
Sequence arranges transmission data mutually.
Fig. 2 is that a kind of time advance for cellular network communication system of the second embodiment of the present invention determines the stream of method
Cheng Tu.Specifically, in the present embodiment, step S201 is first carried out, the base station position information collection that target BS sends, institute is received
State the base station position information collection at least base station position information including the target BS.Specifically, those skilled in the art can be with
Step S101, will not be described here with reference to described in above-mentioned embodiment illustrated in fig. 1.
Then step S202 is performed, the terminal positional information is obtained from the positioning element of the user terminal.More have
Body ground, the positioning element is determined for the geographical position of the user terminal.For example, when the user terminal is mobile phone
When, the positioning element can be the GPS location receiver for being built in the mobile phone.Further, the positioning element can
To be installed in advance on the user terminal, or the outside positioner coupled with the user terminal.It is excellent at one
Select in example, when the present embodiment is performed, the user terminal enables the positioning element to obtain the terminal positional information.
Following execution step S203, base station position information and the terminal positional information according to the target BS,
Determine the distance between the user terminal and the target BS.Specifically, those skilled in the art may be referred to above-mentioned Fig. 1 institutes
Show step S103 described in embodiment, will not be described here.
Step S204 is finally performed, the time advance is determined according to the distance.Specifically, those skilled in the art can
With the step S104 with reference to described in above-mentioned embodiment illustrated in fig. 1, will not be described here.
By upper, using the scheme of second embodiment, by the positioning element of the user terminal, can more intuitively obtain
The terminal positional information of the user terminal, accurately to determine the time advance.It will be appreciated by those skilled in the art that this implementation
The example step S202 can be a specific embodiment of step S102 described in above-mentioned embodiment illustrated in fig. 1, fully profit
The positioning element that can be all configured substantially with current user terminal, or the positioning element that can be coupled with user terminal comes accurate
Position the terminal positional information of the user terminal.
Fig. 3 is that a kind of time advance for cellular network communication system of the third embodiment of the present invention determines the stream of method
Cheng Tu.Specifically, in the present embodiment, step S301 is first carried out, the base station position information collection that target BS sends, institute is received
State the base station position information collection at least base station position information including the target BS.Specifically, those skilled in the art can be with
Step S101, will not be described here with reference to described in above-mentioned embodiment illustrated in fig. 1.
Then step S302 is performed, the base station position information collection also includes multiple base stations neighbouring with the target BS
Base station position information, it is each according to the base station position information of at least three base stations for receiving, and at least three base station
From synchronous reference signal reach time difference of the user terminal, determine the terminal positional information.More specifically, it is described
At least three base stations can select to determine from the multiple base station.Further, the target BS and with it is the multiple
Base station is included in the cellular network communication system.Preferably, the synchronous reference signal is sent respectively by the multiple base station.
For example, by the multiple base station on the premise of retention time synchronization, the broadcast channel for being based respectively on each base station is outwards broadcasted
The synchronous reference signal.
In a preference, the target BS at least obtains two, the periphery base station position information of neighbor base station, and
The base station position information of itself is together sent to the user terminal as the base station position information collection with the target BS,
Three base station position informations of base station are therefrom selected by the user terminal, and it is described to determine that three base stations each send
Synchronous reference signal reaches the time difference (the also referred to as synchronous time difference) of the user terminal, so that using triangle polyester fibre technology to institute
State user terminal to be positioned, to obtain the terminal positional information of the user terminal.Preferably, three base stations include institute
State target BS.
Following execution step S303, base station position information and the terminal positional information according to the target BS,
Determine the distance between the user terminal and the target BS.Specifically, those skilled in the art may be referred to above-mentioned Fig. 1 institutes
Show step S103 described in embodiment, will not be described here.
Step S304 is finally performed, the time advance is determined according to the distance.Specifically, those skilled in the art can
With the step S104 with reference to described in above-mentioned embodiment illustrated in fig. 1, will not be described here.
In a typical application scenarios shown in Fig. 3 and Fig. 4 are combined, at least three base station can include target
Base station A1 and other base stations (for example, base station A2 and base station A3 Fig. 4 shown in), the mesh adjacent with the target BS A1
Mark base station A1 adds the base station position information collection, the base station position information collection to include institute in the system information of outside broadcast
State the base station position information of target BS A1, base station A2 and base station A3.Because user terminal B cannot be determined certainly based on positioning element
The terminal positional information of body, then the user terminal B concentrated from the base station position information that receives and obtain the target base
Stand the base station position information of A1, base station A2 and base station A3, it is fixed by triangle then according to the base station position information of these three base stations
Position determines the terminal positional information of the user terminal B.
Further, with reference to shown in Fig. 5, in the cellular network communication system, during due to requiring to keep between each base station
Between it is synchronous so that the target BS A1, base station A2 and base station A3 can in the same time broadcast the synchronous reference signal (for example in phase
Signal leaves the time of base station in Fig. 5), but because the user terminal B is different from the space length of each base station, cause different bases
Standing in the time of the synchronous reference signal arrival user terminal B of synchronization broadcast can have a time difference, that is, observe
Time difference (Observed Time Difference, abbreviation OTD), the observed time difference is referred to as the synchronous time difference.Example
Such as, in the schematic diagram shown in Fig. 5, the target BS A1, base station A2 and base station A3 are in identical moment outside broadcast singal
(for example, broadcasting the synchronous reference signal), transverse axis represents the moment that user terminal B receives the synchronous reference signal, from
Fig. 5 can be seen that the difference due to space length, what the target BS A1, base station A2 and base station A3 sent in synchronization
The synchronous reference signal reaches the target terminal B at the different moment, and the difference between the different moment is institute
State observed time difference.For example, the observed time difference 11 in Fig. 5 is the observed time difference of the target BS A1 and base station A2.
It will be appreciated by those skilled in the art that in actual applications, the user terminal is preferably all the time to the target BS
Keep synchronous, meanwhile, because the user terminal needs to be ready to be switched on more preferable base station, the user terminal
Pair base station neighbouring with the target BS synchronizes time difference monitoring always.Therefore, the embodiment of the present invention is actually being performed
During technical scheme, the observed time difference can be predetermined, when the user terminal can directly invoke the observation
Between it is poor, make triangle with the target BS A1, the space length between base station A2 and base station A3 respectively with reference to the user terminal B
Shape, so as to calculate the terminal positional information for determining the user terminal B by geometry.
In a change case of the present embodiment, the user terminal can concentrate selection not from the base station position information
Only three base station position informations of base station, for example, the user terminal can determine multiple bases based on the more than three base station
Stand group, each group of base stations includes three base stations.For each group of base stations, the technology of step S302 described in the present embodiment can be performed
Scheme, with the respective reference synchronization of the base station position information based on three base stations in the group of base stations and three base stations
Signal reaches the time difference of the user terminal, and the terminal positional information is determined by triangle polyester fibre.Then, for each base
Stand group, base station position information according to the target BS and the terminal positional information determined based on the group of base stations, really
Surely corresponding to the candidate distance of the group of base stations, most the corresponding candidate distance of each group of base stations adds and averages at last,
So as to obtain the distance between the user terminal and the target BS.
Further, for each group of base stations, three base stations can include the target BS.Further, two
The base station included in individual group of base stations can have part to repeat, and the base station for repeating can be target BS, or target BS
Base station in addition.
It will be appreciated by those skilled in the art that in actual applications, due to factors such as landform, may cause from base station transmit to
There is the possibility of multipath in the broadcast message of family terminal, i.e., the information (for example, described synchronous reference signal) that described base station sends can
Can not be transmitted by straight line, but mirror-reflection for passing through building etc. is transferred to the user terminal, such situation can
There is deviation in the observed time difference that the user terminal can be caused to observe, and then causes the terminal positional information to user terminal
Determine existing deviation.In order to eliminate the influence that such deviation determines time advance to the embodiment of the present invention, this change case is excellent
Selection of land repeatedly measurement average by way of, the terminal location of the user terminal determined respectively based on multiple group of base stations
Information obtains the multiple candidate distances between the user terminal and the target BS, and then to the multiple candidate distance
Plus and average, to obtain the theoretical distance between the user terminal and the target BS.It will be appreciated by those skilled in the art that
The scheme of this change case is conducive to more accurately determining the terminal positional information of the user terminal, reduces the issuable time
Calculation error in advance.
In one preferably application scenarios, the cellular network communication system preferably allows for the time and carries in design
Before there is a certain degree of error.For example, the Cyclic Prefix (Cyclic Prefix, abbreviation CP) in 4G cellular network communication systems
Time advance error caused by about 600 meters of distances can be accommodated.
By upper, using the scheme of 3rd embodiment, the user terminal can be determined by triangle polyester fibre technology
Position, to obtain the terminal positional information of the user terminal, and then determines the time advance.It will be appreciated by those skilled in the art that
Step S302 described in the present embodiment can be understood as a change case of step S202 described in above-mentioned embodiment illustrated in fig. 2, for example,
When the positioning element that cannot be based on the user terminal accurately obtains the terminal positional information of the user terminal, can be based on
The technical scheme of the present embodiment, by the base station position information of at least three base station and at least three base station each
Synchronous reference signal reach time difference of the user terminal, aid in determining the end of the user terminal with reference to triangle polyester fibre
End position information.
It will be appreciated by those skilled in the art that technical scheme described in the present embodiment utilizes triangle polyester fibre technology, by least 3 bases
Stand and the orientation of the user terminal is detected in diverse location, the terminal of the user terminal is then determined with triangle geometrical principle
Positional information, and then the distance between the user terminal and the target BS is obtained in the hope of the time advance.Wherein, institute
Stating triangle polyester fibre technology can also replace with existing other location technologies, for example, trilateration etc., those skilled in the art
Can according to actual needs become and dissolve more embodiments, will not be described here.
Fig. 6 is a kind of knot of time advance determining device for cellular network communication system of the fourth embodiment of the present invention
Structure schematic diagram.It will be appreciated by those skilled in the art that time advance determining device 4 described in the present embodiment is used to implement above-mentioned Fig. 1 to Fig. 5
Method and technology scheme in illustrated embodiment.Specifically, in the present embodiment, the time advance determining device 4 includes receiving
Module 41, the base station position information collection for receiving target BS transmission, the base station position information collection at least includes the mesh
Mark the base station position information of base station；First determining module 41, the terminal positional information for determining user terminal；Second determines mould
Block 43, for the base station position information according to the target BS and the terminal positional information, determine the user terminal with
Distance between the target BS；And the 3rd determining module 44, for determining the time advance according to the distance.
Further, the base station position information collection is contained in the system information that the target BS sends, and described the
Three determining modules 44 include the first calculating sub module 441, for the spread speed by the distance divided by the system information after,
Multiplied by with the interaction times in signal period with the target BS, to obtain the time advance.
Preferably, the system speed of the broadcast message is the light velocity.
Preferably, with the interaction times of the target BS it is 2 times in the signal period.
Further, first determining module 42 includes acquisition submodule 421, for the positioning from the user terminal
Terminal positional information described in component retrieval.
In a change case of the present embodiment, the base station position information collection also includes neighbouring with the target BS
The base station position information of multiple base stations, first determining module 42 includes the first determination sub-module 422, is received for basis
At least three base stations base station position information, and the respective synchronous reference signal at least three base station reaches the use
The time difference of family terminal, determine the terminal positional information.
Further, first determination sub-module 422 includes acquiring unit 4221, for obtaining three base stations of base station
The respective synchronous reference signal of positional information and three base stations reaches the time difference of the user terminal；And first is true
Order unit 4222, for the respective reference synchronization letter of the base station position information based on three base stations and three base stations
The time difference of the user terminal number is reached, the terminal positional information is determined by triangle polyester fibre.Preferably, three bases
Stand including the target BS.
Used as change case, first determination sub-module 422 includes the second determining unit 4223, many for determining
Individual group of base stations, each group of base stations includes three base stations；And the 3rd determining unit 4224, for each group of base stations, based on described
The respective synchronous reference signal of the base station position information of three base stations in group of base stations and three base stations reaches the use
The time difference of family terminal, the terminal positional information is determined by triangle polyester fibre.Accordingly, second determining module 43 includes
Second determination sub-module 431, for each group of base stations, base station position information according to the target BS and based on the base
The terminal positional information that group of standing determines, it is determined that corresponding to the candidate distance of the group of base stations；And second calculating sub module
432, for adding and averaging the corresponding candidate distance of each group of base stations, to obtain the user terminal with the mesh
Distance between mark base station.
More contents of operation principle, working method on the time advance determining device 4, are referred to Fig. 1 extremely
Associated description in Fig. 5, repeats no more here.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with instructing the hardware of correlation by program, the program can be stored in computer-readable recording medium, to store
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, are not departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (18)
1. a kind of time advance for cellular network communication system determines method, it is characterised in that comprise the following steps：
The base station position information collection that target BS sends is received, the base station position information collection at least includes the target BS
Base station position information；
Determine the terminal positional information of user terminal；
Base station position information and the terminal positional information according to the target BS, determine the user terminal with the mesh
Distance between mark base station；
The time advance is determined according to the distance.
2. time advance according to claim 1 determines method, it is characterised in that the base station position information collection is contained in
In the system information that the target BS sends, determine that the time advance includes according to the distance：By the distance divided by
It is described to obtain multiplied by with the interaction times in signal period with the target BS after the spread speed of the system information
Time advance.
3. time advance according to claim 2 determines method, it is characterised in that the spread speed of the system information is
The light velocity.
4. time advance according to claim 2 determines method, it is characterised in that with the target in the signal period
The interaction times of base station are 2 times.
5. time advance according to claim 1 determines method, it is characterised in that the terminal position of the determination user terminal
Confidence breath includes：
The terminal positional information is obtained from the positioning element of the user terminal.
6. time advance according to claim 1 determines method, it is characterised in that the base station position information collection also includes
The base station position information of the multiple base stations neighbouring with the target BS, the terminal positional information bag of the determination user terminal
Include：
According to the base station position information of at least three base stations for receiving, and the respective reference synchronization at least three base stations
Signal reaches the time difference of the user terminal, determines the terminal positional information.
7. time advance according to claim 6 determines method, it is characterised in that the basis receive at least three
The base station position information of base station, and the respective synchronous reference signal at least three base station reach the user terminal when
Between it is poor, determine that the terminal positional information includes：
The respective synchronous reference signal of base station position information and three base stations for obtaining three base stations reaches the user
The time difference of terminal；
The respective synchronous reference signal of base station position information and three base stations based on three base stations reaches described
The time difference of user terminal, the terminal positional information is determined by triangle polyester fibre.
8. time advance according to claim 7 determines method, it is characterised in that three base stations include the target
Base station.
9. time advance according to claim 6 determines method, it is characterised in that the basis receive at least three
The base station position information of base station, and the respective synchronous reference signal at least three base station reach the user terminal when
Between it is poor, determine that the terminal positional information includes：
It is determined that multiple group of base stations, each group of base stations includes three base stations；
For each group of base stations, base station position information and three base stations based on three base stations in the group of base stations are each
From synchronous reference signal reach time difference of the user terminal, the terminal positional information is determined by triangle polyester fibre；
Base station position information and the terminal positional information according to the target BS, determine the user terminal with the mesh
Distance between mark base station includes：
For each group of base stations, base station position information according to the target BS and described in being determined based on the group of base stations
Terminal positional information, it is determined that corresponding to the candidate distance of the group of base stations；
The corresponding candidate distance of each group of base stations is added and averaged, to obtain the user terminal with the target base
Distance between standing.
10. a kind of time advance determining device for cellular network communication system, it is characterised in that including：
Receiver module, the base station position information collection for receiving target BS transmission, the base station position information collection at least includes
The base station position information of the target BS；
First determining module, the terminal positional information for determining user terminal；
Second determining module, for the base station position information according to the target BS and the terminal positional information, determines institute
State the distance between user terminal and the target BS；
3rd determining module, for determining the time advance according to the distance.
11. time advance determining devices according to claim 10, it is characterised in that the base station position information collection is included
In the system information that the target BS sends, the 3rd determining module includes：First calculating sub module, for by described in
After distance is divided by the spread speed of the system information, multiplied by with the interaction times in signal period with the target BS, with
Obtain the time advance.
12. time advance determining devices according to claim 11, it is characterised in that the spread speed of the system information
It is the light velocity.
13. time advance determining devices according to claim 11, it is characterised in that with the mesh in the signal period
The interaction times for marking base station are 2 times.
14. time advance determining devices according to claim 10, it is characterised in that first determining module includes：
Acquisition submodule, for obtaining the terminal positional information from the positioning element of the user terminal.
15. time advance determining devices according to claim 10, it is characterised in that the base station position information collection is also wrapped
The base station position information of the multiple base stations neighbouring with the target BS is included, first determining module includes：
First determination sub-module, for the base station position information according at least three base stations for receiving, and described at least three
The individual respective synchronous reference signal in base station reaches the time difference of the user terminal, determines the terminal positional information.
16. time advance determining devices according to claim 15, it is characterised in that the first determination sub-module bag
Include：
Acquiring unit, for obtaining three respective synchronous reference signals of base station position information and three base stations of base station
Reach the time difference of the user terminal；
First determining unit, for the base station position information based on three base stations and the respective synchronization in three base stations
Reference signal reaches the time difference of the user terminal, and the terminal positional information is determined by triangle polyester fibre.
17. time advance determining devices according to claim 16, it is characterised in that three base stations include the mesh
Mark base station.
18. time advance determining devices according to claim 15, it is characterised in that the first determination sub-module bag
Include：
Second determining unit, for determining multiple group of base stations, each group of base stations includes three base stations；
3rd determining unit, for each group of base stations, base station position information based on three base stations in the group of base stations and
The respective synchronous reference signal in three base stations reaches the time difference of the user terminal, and the end is determined by triangle polyester fibre
End position information；
Second determining module includes：
Second determination sub-module, for each group of base stations, base station position information according to the target BS and based on described
The terminal positional information that group of base stations determines, it is determined that corresponding to the candidate distance of the group of base stations；
Second calculating sub module, it is described to obtain for adding and averaging the corresponding candidate distance of each group of base stations
Distance between user terminal and the target BS.
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| CN201611259456.5A CN106793057A (en) | 2016-12-30 | 2016-12-30 | Time advance for cellular network communication system determines method and device |
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