CN105830510A - Systems and methods for location determination - Google Patents
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- CN105830510A CN105830510A CN201480062934.6A CN201480062934A CN105830510A CN 105830510 A CN105830510 A CN 105830510A CN 201480062934 A CN201480062934 A CN 201480062934A CN 105830510 A CN105830510 A CN 105830510A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0221—Receivers
- G01S5/02213—Receivers arranged in a network for determining the position of a transmitter
- G01S5/02216—Timing or synchronisation of the receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0273—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves using multipath or indirect path propagation signals in position determination
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses systems and methods for location determination. In particular, embodiments described by the present disclosure provide improved systems and methods for determining the location of a mobile device, In one embodiment, a system comprises a distributed antenna system (DAS) configured to relay signals to and from the mobile device, Further, the DAS comprises a hub unit; and multiple remote antenna units coupled to the hub unit, wherein signals relayed between the remote antenna units and the hub unit are delayed such that different signal paths between the remote antenna units and the hub unit have different delay times. The system also comprises a base station coupled to the hub unit, wherein the base station receives the signals from the hub unit and determines the delay of signals transmitted between the mobile device and the base station, wherein the system determines the location of the mobile device by using the delay for RF pattern matching.
Description
Background technology
The variation of the signal received from the transmitter being positioned at diverse location may be used for the position identifying receiver relative to transmitter site.Such as, global positioning system (GPS) satellite uses trilateration to identify the position of GPS, and wherein each gps satellite sends different signals to GPS.In similar example, the position of mobile device is to be determined by the difference of the signal of transmission between each cell tower and mobile device during multiple cell tower communications.For example, it is possible to be compared to determine position together with the information of the position for identifying cell tower by signal arrives the time of different tower.But, in some communication systems (such as distributing antenna system), base station receives the signal representing that relay and combination distributing antenna system multiple signals along multiple transmission paths from mobile device.Owing to base station can not be according to the different transmission path of relaying signal distinguishing, so base station not can determine that the position of mobile device, unless be known by the delay of DAS.
Summary of the invention
Embodiment described by the disclosure provides the improvement system and method for the position for determining mobile device.In one embodiment, a kind of system includes: distributing antenna system (DAS), and it is configured to going to and relaying from the signal of mobile device.Additionally, described distributing antenna system includes: center (hub) unit；And it is coupled to multiple remote antenna units of described center cell, wherein, between the plurality of remote antenna unit and described center cell, the signal of relaying is delayed by so that at least two signal path between the plurality of remote antenna unit from described center cell has different time delay.Described system also includes the base station being coupled to described center cell, and wherein, described base station receives described signal from described center cell, and determines the delay of the signal of transmission between described mobile device and described base station.Additionally, described system is configured with RF mode-matching technique by using delay determined by described base station to determine the position of described mobile device.
Accompanying drawing explanation
Fig. 1 is the block diagram of an advanced embodiment of the communication network of the position that can determine mobile device.
Fig. 2 is configured as the block diagram of an advanced embodiment of the distributing antenna system that granularity diversified to signal is controlled.
Fig. 3 is configured as postponing signal so that the block diagram of an advanced embodiment of the diversified distributing antenna system of signal received by different remote antenna units.
Fig. 4 is the flow chart of an exemplary embodiment of the method for the position for determining mobile device.
Running through accompanying drawing and text, reference marker represents similar element.
Detailed description of the invention
Fig. 1 shows the block diagram of an embodiment of the communication system 100 of the position for determining mobile device 140.Communication system 100 includes the base station 102 being communicably coupled to distributing antenna system (DAS) 101.In at least one realizes, base station 102 uses RF pattern match to determine the position of mobile device 140, and wherein, base station 102 identifies the different RF characteristics of the possible position for mobile device 140.In order to communicate with mobile device 140, DAS101 relays radiofrequency signal between one or more upstream equipments (such as, other source of base station 102, WAP or radiofrequency signal) and one or more downstreams wireless device (such as mobile device 140).In certain embodiments, base station 102 is a part for the infrastructure of telco service provider, and mobile device 140 is subscriber equipment.Usually, for the channel that each radiofrequency signal or base station 102 are communicated with downstream mobile device 140, original downlink radio frequency signal is initially sent by base station 102, receive for one or more mobile devices 140, and original uplink radio frequency signal is initially sent by mobile device 140, receive for base station 102.
Communication between wireless terminal (such as mobile device 140) and the communication between wireless terminal and other communication network (such as replacing base station 103) being coupled to base station 102 are managed by base station 102.In one embodiment, the communication between mobile device 140 and PSTN (PSTN) is managed by base station 102.In this embodiment, such as, communication network 100 is honeycomb/pcs system, and base station 102 communicates with base station controller, and base station controller serves as the voice/PSTN gateway of PSTN.In another embodiment, the communication between mobile device 140 and IP-based network (such as the Internet) is managed by base station 102 via the communication between Internet protocol (IP) gateway.In such an embodiment, base station 102 performs Base-Band Processing to the IP data from IP gateway, and IP data is placed on channel.In another realizes, base station 102 is the base station meeting IEEE802.16.Alternatively, base station 102 can also meet the requirement of WiMax, WiBro, LTE or other alliance.In another embodiment, base station 102 includes multiple function, is managed including to the communication between both PSTN and IP based network.
In at least one exemplary embodiment, DAS101 includes: be communicably coupled to the center cell 106 of base station 102；And it is in away from and is communicably coupled to the remote antenna unit 108 at center 106.Each remote antenna unit 108 includes one or more antenna 110, and it is for wirelessly communicating with mobile device 140.In some implementations, center 106 is optically coupled to base station 102, although in other realizes, center 106 and base station 102 are communicatively coupled by coaxial cable, wireless antenna or other communication media.Similarly, center 106 is communicably coupled to remote antenna unit 108 by optical fiber, coaxial cable, wireless antenna or other communication media.The signal received from remote antenna unit 108 is combined by center 106, and subsequently by combination signal relay to base station 102.In at least one exemplary realization, center cell 106 uses digital adder that the signal received from multiple remote antenna units 108 carries out numeral combination.Alternatively, center cell 106 uses analog adder to be combined the signal received from multiple remote antenna units 108.Additionally, center cell 106 receives signal from base station 108, and by this signal relay to multiple remote antenna units 108.
Base station 102 uses DAS101 to communicate with mobile device 140 via antenna 110.Two-way communication between base station 102 and multiple mobile device 140 completes by using Multiple Access scheme.In one embodiment, base station 102 and mobile device 140 employing code division multiple access (CDMA) scheme communicate.In another embodiment, base station 102 and mobile device 140 use OFDM (OFDMA) scheme to communicate.In other embodiments, other Multiple Access scheme (such as TDMA, FDAM), or the Multiple Access scheme of use more than one are used, including the such as CDMA for voice communication and the OFDMA for data communication.
Mobile device 140 is to be connected wirelessly to the electronic equipment of communication system 100.In at least one exemplary embodiment, mobile device 140 includes cell phone, tablet PC, laptop computer etc..Mobile device 140 is to move to the equipment of another position from a position.As described in this article, communication system 100 is by using RF pattern match to determine the position of mobile device 140.As a part for RF pattern match, communication system 100 can identify remote antenna unit 108, and wherein mobile device 140 uses described remote antenna unit 108 to communicate.In one example, mobile device 140 receives the information of the position of instruction mobile device 140 by DAS101 from base station 102, and displays to the user that this information in mobile device 140.Alternatively, communication system 100 determines the position of mobile device 140, and sends that information to electronic third-party equipment, is classified by the cataloging of information of the position about mobile device 140, etc..
In certain embodiments, communication system 100 is by identifying that remote antenna unit 108 determines the position of mobile device 140, and wherein mobile device 140 is communicated with base station 102 by described remote antenna unit 108.Remote antenna unit 108 by the signal relay that receives from mobile device 140 to center cell 106, then the signal of relaying is combined by center cell 106 with other signal received from other remote antenna unit 108, and by the signal relay of combination to base station 102.Because center cell 106 by combination signal relay to base station 102, so base station 102 receive represent from multiple remote antenna units 108 combination export individual signals.Such as, at center cell 106, first signal of relaying between the first remote antenna unit 108 and center cell 106 and the secondary signal relayed between the second remote antenna unit 108 and center cell 106 are combined.The signal of combination is sent to base station 102 by center cell 106 subsequently.Base station 102 receives and includes the first signal and the composite signal of secondary signal a combination of both component.But, when base station 102 communicates with mobile device 140, base station 102 not can determine which remote antenna unit 108 just trunking traffic between base station 102 and mobile device 140.Because base station 102 not can determine that the remote antenna unit 108 of trunking traffic between base station and mobile device 140, so base station 102 can not use that relayed by multiple remote antenna units 108 and combination at center cell 106 signal to determine the position of mobile device 140.But, in some of the exemplary embodiments, DAS101 changes the characteristic of the signal relayed along the different transmission path between multiple remote antenna units 108 and center cell 106 so that the different transmission path between remote antenna unit 108 and center cell 106 can be distinguished according to the information that composite signal includes in base station 102.And, it is changed allowing DAS100 with higher resolution to differentiate the position of mobile device 140 to the characteristic of the signal relayed along different transmission path.
As used herein, the method that RF pattern match typically refers to the position for estimating mobile device 140 based on the wireless link measurement collected from network and/or mobile device 140.RF pattern match depends on prediction or the model of wireless environment, and wherein these are measured according to described prediction or model and perform method comparison and most preferably mate estimation with determine the position of mobile device 140 by system (such as base station 102 or position units 112).Such as, increasing, by DAS, measurement that deliberate delay provided can additionally and other measurement is used together to distinguish the diverse location in DAS overlay area.Different delays is measured by cellular system, and assists in the position of mobile device 140.
In at least one exemplary embodiment, DAS101 is by time delay different for the signal delay along the different transmission path relaying between center cell 106 from multiple remote antenna units 108.The variation of time delay allows base station 102 to distinguish the different transmission path through distributing antenna system 101.Specifically, base station 102 is by identifying different transmission paths the time delay being associated from particular transmission path.By identifying the different transmission path through distributing antenna system 101, base station 102 can determine the position of mobile device 140.As previously mentioned, distributing antenna system 101 includes center cell 106 and multiple remote antenna unit 108.Transmission path through distributing antenna system 101 is the communication connection each remote antenna unit 108 and center cell 106.In at least one realizes, the time period that the signal along the first transmission path relaying is delayed by is different from the time period that the signal along the second transmission path is delayed by.Such as, as shown in Figure 1, the remote antenna unit 108 that center cell 106 is different from three communicates.Each remote antenna unit 108 utilizes center cell 106 along different transmission paths relaying signal, and is delayed by different time delay along the signal of different transmission path.Such as, three different transmission path between remote antenna unit 108 and center cell 106 are delayed by the first delay the 104, second delay 105 and the 3rd delay 107.In at least one realizes, the downlink delay time from base station 102 to mobile device 104 is reported back to base station 102.
In at least one exemplary embodiment, base station 102 stores the information describing the delay being associated with different transmission path so that base station 102 is capable of identify that the remote antenna unit 108 relaying the signal received.When base station 102 receives signal from center cell 106, base station 102 determines the delay of this signal.Such as, base station 102 calculates the different delays of different transmission path by DAS101 based on the communication protocol that base station 102 is followed when being communicated from mobile device 140.When delay is identified in base station 102, the information of delay that base station is associated with different transmission path according to the description of storage on base station 102, delay determined by use identifies the transmission path of signal.When transmission path is determined in base station 102, base station 102 identifies the remote antenna unit communicated with mobile device 140.Such as, base station 102 sends the downlinlc message for mobile device 140 by DAS101.This signal is responded by mobile device 140 by sending uplink message, and described uplink message is received by DAS101 and passes through DAS101 and relayed, and receives for base station 102.Downlink and uplink message are postponed different time delay by DAS101 according to the different transmission path that the message relayed is advanced.When base station 102 receives the uplink message being derived from mobile device 140, time that base station 102 is sent based on downlinlc message and the Expected Response time from mobile device 140 determine the delay of signal.Such as, base station 102 determines that downlink and uplink message are all delayed by the second delay 105.Base station 102 determines that up-link and downlinlc message are delayed by the second delay 105, and by determined by postpone to compare with the information being stored on base station 102, and determine and postpone the 105 transmission paths being associated with second.After based on postponing to identify correct transmission path, base station 102 can position mobile device 140.
In an alternate embodiment, base station 102 determines delay, and with the message postponed determined by the relaying description of backward position units 112.Position units 112 postpones to identify transmission path and the position of mobile device 140 determined by using.Such as, base station 102 receives the signal being delayed by the first delay 104 being derived from mobile device 140.Base station 102 determines that the signal received is delayed by the first delay 104, and sends delay information with rear to position units 112.The information of delay information with the description communication system 100 being stored in position units 112 is compared by position units 112 subsequently, to determine transmitting path and determining the position of mobile device 140 through distributing antenna system 101.In one implementation, position units 112 is a part for base station 102.In at least one realizes, in order to determine delay, the signal received by different remote antenna units 108 is associated by distributing antenna system 101 or base station 102 with intended signal reception time.According to the time being associated with the maximum signal power by receiving through each transmission path of distributing antenna system 101, the delay in each transmission path can be calculated.
In a further embodiment, position units 112 uses the data beyond delay information to determine the position of mobile device 140.In at least one exemplary realization, the cell ID that position units 112 uses mobile device 140 to carry out is measured and signal intensity.Such as, mobile device 140 communicates with replacement base station 103 and base station 102.Mobile device 140 identifies the cell ID replacing base station 103, and sends the cell ID replacing base station 103 to base station 102.After receiving the cell ID replacing base station 103 communicated with mobile device 140, base station 102 uses the cell ID replacing base station 103 to further discriminate between the transmission path between center cell 106 and mobile device 140, and further determines that the position of mobile device 140.In further example, mobile device 140 also sends to base station 102 from the received signal strength replacing the signal that base station 103 receives.Base station 102 combines cell ID and uses from replacing the received signal strength of the signal that base station 103 receives to further determine that the position of mobile device 140.In the exemplary embodiment replaced, base station 102 determines the received signal strength of the signal received from mobile device 140, and determine the cell ID replacing base station 103 communicated with mobile device 140, send this received signal strength and this cell ID with rear to position units 112.Position units 112 based on this received signal strength, this cell ID and between remote antenna unit 108 and center cell 106 delay of signal of relaying determine the position of mobile device 140.
In some implementations, within signal is constrained in the specific time period along the time period that transmission path is delayed by.One such constraint is that too long of delay may negatively affect the communication between base station 102, and the shortest delay is not provided that the enough information for distinguishing a transmission path and another transmission path.Such as, when the first delay 104 and the 3rd delay 107 are oversize, base station 102 possibly cannot reliably communicate with mobile device 140.Such as, retraining of the communication protocol that the length of delay may be moved.When postponing to become oversize, base station 102 can not communicate with mobile device, this is because delay is beyond the permission delay of specific protocol so that can not reliably recover signal.Alternatively, when first postpone 104 and the 3rd difference postponing between 107 the least time, base station 102 will be unable to unambiguously determine the transmission path of signal specific.Due to the constraint to delay scope, when there is the substantial amounts of remote antenna unit being connected to center cell, some in the different transmission path between multiple remote antenna units 108 and center cell 106 have identical delay.Such as, the signal along the first transmission path is delayed by the first delay 104.It addition, the signal along different transmission path transmission is delayed by the 3rd delay 107, wherein the 3rd postpones 107 equal to the first delay 104.
In at least one realizes, at the during the design of distributing antenna system 101, the designer of distributing antenna system 101 can specifically select and each the different time delay being associated in the multiple remote antenna units 108 in distributing antenna system 101.Therefore, the designer of distributing antenna system 101 can be to postponing to plan so that there is enough delay difference between the time delay that neighbouring remote antenna unit is associated.It addition, designer may be it can be avoided that make be associated with neighbouring remote antenna unit the time delay repeated.Such as, if certain time delay is used for more than one remote antenna unit, so designer can specifically select to be sufficiently spaced-apart remote remote antenna unit, or selecting to exist the remote antenna unit of other recognizable characteristic, other recognizable characteristic wherein said has contribution to the differentiation of the signal by different remote antenna units.
In some of the exemplary embodiments, when the different transmission path between multiple remote antenna units 108 and center cell 106 has same delay, base station 102 uses other available distinctive characteristics of these different transmission path.In one exemplary embodiment, in conjunction with time delay, different transmission paths is distinguished based on the cell ID replacing base station 103 communicated from mobile device 140 in base station 102.Additionally, base station 102 also receives the instruction of the received signal strength of the communication about mobile device 140 reception replacing base station 103 from first.In order to be separated in the signal and the signaling zone being delayed by the first delay 104 that are delayed by the 3rd delay 107, base station 102 receives the cell ID (its mobile device 140 receives) of the 3rd replacement base station 103.It addition, base station 102 also receives the instruction of the received signal strength of the communication about mobile device 140 reception replacing base station 103 from the 3rd.When different transmission paths are by identical delayed relaying signal time delay, the reception of signal and replace the information that base station 103 is associated help base station 102 to identify these different transmission paths from different.It addition, such as other parameter of received signal strength indicator (RSSI) and community ID etc can be used for distinguishing transmission path is delayed by the possible position of identical traffic time.
In one embodiment, the length in the transmission path that the signal of relaying is delayed by between remote antenna unit 108 and center cell 106 between remote antenna unit 108 and center cell 106.Such as, realize the first delay 104, second and postpone 105 and the 3rd and postpone 107 by utilizing the communication cable (such as coaxial cable, optical fiber etc.) of different length to connect each individual remote antenna unit (it is connected to center cell 106).Alternatively, between remote antenna unit 108 and center cell 106, the signal of relaying is delayed by by or digitally postponing described signal in center cell 106 in remote antenna unit 108.In at least one realizes, in remote antenna unit 108, the delay of digital increase is configured by external equipment, and can be reconfigured directly or through the order received via base station 102.Alternatively, when digitally postponing signal in center cell 106, each signal received from remote unit 108 along separate transmission path is postponed individually, and then these signals are combined for transmission to base station in center cell 106.By mode as the deferred class realized with remote antenna unit 108, in at least one exemplary realization, the delay digitally increased in center cell 106 is configured by external equipment, and can be reconfigured directly or through the order received via base station 102.
In a further implementation, by setting up multipath profile, different delays may also help in the position determining mobile device 140.Such as, if mobile device 140 is communicated with base station 102 by distributing antenna system 101, then the signal of transmission can be reflected by the surface in environment.Reflection can be received by distributing antenna system 101 or mobile device 140, using as mixed signal, its different distance advanced when being reflected by surface according to signal, mixed signal by the signal comprising identical data but be offset from one another on time and amplitude and form.When distributing antenna system or base station receive mixed signal, mixing can be received signal and be associated with the single reference signal representing expection reception signal by reception system.This association will produce multiple peak values at different time and various amplitude, and wherein, each peak value is corresponding with the signal of reflection.When performing this association, the information describing produced multiple peak values can be preserved into the multipath profile that the position with mobile device 140 is associated.What multipath profile may then serve as the position for identifying mobile device 140 further discriminates between device.In one embodiment, multipath profile includes at least time and the amplitude of produced multiple peak values.
Fig. 2 is configured as the block diagram of an advanced embodiment of the distributing antenna system 201 that granularity diversified to signal is controlled.The distributing antenna system 101 that distributing antenna system 201 is similar in Fig. 1.Specifically, distributing antenna system 201 includes center cell 206, remote antenna unit 208 and antenna 210, they be functionally similar to center cell 106, remote antenna unit 108 and antenna 110.In certain embodiments, distributing antenna system 201 can suffer from multiple constraint, and the ability of the different transmission path between remote antenna unit and center cell 206 is distinguished in the base station in these effect of constraint value Fig. 1.These constraints include narrow may postponing, limited processor ability, requirement etc. to the precision of the position determining mobile device 240.In certain embodiments, in order to adapt to the different constraints to the configuration that the delay along different transmission path is carried out, the signal from remote antenna unit 108 groups can suffer identical delay.Such as, as shown in Figure 2, remote antenna unit 108 is divided into three separate group: first delay group the 203, second delay groups 204 and the 3rd delay groups 205.In one implementation, when remote antenna unit 208 is divided into different groups, based on remote antenna unit 208 position relative to each other, remote antenna unit 208 is divided into different groups.
Fig. 3 is configured as postponing signal so that passing through the block diagram of an advanced embodiment of the diversified distributing antenna system of signal that different remote antenna units 308 receive.In some implementations, in order to unambiguously identify the different transmission path between remote antenna unit 308 and center cell 306, the configuration of time delay is limited by the communication protocol followed when with mobile device communication.Alternatively, the configuration of time delay is also possible to be limited by some constraint of the size depending on remote antenna overlay area 310 and base station coverage area 312.As used herein, remote antenna overlay area 310 refers to the overlay area being associated with remote antenna unit 308, and base station coverage area 312 refers to reflect the region in the combined covering region of the remote antenna unit 308 being connected to center cell 306.
When the configuration of time delay is limited by communication protocol, this communication protocol can define minimum resolution, the minimum delay in its constraint transmission path.Similarly, communication protocol can define maximum allowable time delay, such as search window, and wherein, definition maximum allowable time delay is for responding the time window of transmission.In certain protocols, if definition time window in be not received by message, then expect this message equipment can as this message by send should carry out next step.Owing to there is the limited time window for transmission, so can serve as the upper limit when the time delay in differently configured transmission path maximum allowable time delay.
In a further exemplary embodiment, in order to unambiguously determine the different transmission path between remote antenna unit 308 and center cell 306, the time delay being delayed by along the signal of these transmission path relayings is bigger than the remote antenna overlay area propagation time 302, but less than the base station maximal cover region propagation time 304 of configuration.Such as, if the propagation time 302 is 302ns, and 10 μ s during maximal cover region, the base station propagation time configured, then the signal of relaying is delayed by bigger than the propagation time 302 (30ns) but less than the base station maximal cover region propagation time 304 (10 μ s) of the configuration time period between remote antenna unit 308 and center cell 306.The postpone period bigger than the propagation time 302 prevents base station to receive identical signal from two different transmission path simultaneously.Additionally, the delay period less than the base station maximal cover region propagation time 304 of configuration allows base station to be communicated with mobile device by DAS.
Fig. 4 determines that the flow chart of an exemplary embodiment of the method 400 of the position of mobile device 140.The embodiment of the method 400 shown in the diagram has herein been described as realizing in the system 100 of figure 1, although other embodiments can realize by other method.
Method 400 includes: relay signal (square frame 402) between mobile device 140 and base station 102 by multiple remote antenna units.Base station 102 is communicated with mobile device 140 by distributing antenna system 101.Such as, base station sends downlinlc message by the center cell 106 in DAS101 to mobile device 140, and wherein, center cell 106 relays this message to multiple remote antenna units 108.Multiple remote antenna units 108 relay this downlinlc message by antenna 110 to mobile device 140 subsequently.Mobile device 140 receives the downlinlc message that the remote antenna unit 108 in multiple remote antenna unit 108 is relayed.Additionally, mobile device 140 sends uplink message, this uplink message is received by the remote antenna unit 108 in multiple remote antenna units 108.Remote antenna unit 108 (uplink message is received by this remote antenna unit) relays this uplink message to center cell 106, then, the signal that the uplink message received and other remote antenna unit from multiple remote antenna units 108 receive is combined by center cell 106.Center cell 106 is with the uplink message of backward base station 102 relaying combination.
Method 400 also includes: by time delay (square frame 404) different for the signal delay of transmission between base station and the different remote antenna units in multiple remote antenna units.Such as, when relaying signal between center cell 106 and multiple remote antenna unit 108, the time delay that this signal delay is defined.Additionally, for relaying the different transmission path of signal between center cell 106 from mobile device 140 by time delay different for signal delay by multiple remote antenna units 108.In one embodiment, by the physical transfer distance between signal delay center cell 106 and multiple remote antenna unit 108.Alternatively, by center cell 106, multiple remote antenna unit 108 or both digitally postpone signal.
Method 400 also comprises determining that the delay (square frame 406) of the signal of transmission between base station 108 and mobile device 140.Such as, base station 102 determines the delay of the uplink message received, and described uplink message sends from mobile device 140.In at least one embodiment, base station 102 sends downlinlc message by DAS101 to mobile device 140.As the response to downlinlc message, base station 102 receives uplink message from mobile device 140.When receiving uplink message, the time that the reception time of uplink message and uplink message are arranged to receive by base station 102 compares.
Method 400 also includes: based on postponing to determine the position of mobile device.In at least one exemplary embodiment, when base station 120 is determined from the delay of the uplink message that mobile device 140 sends, the data of the delay that this delay is associated with the different transmission path through multiple remote antenna units 108 with the description being stored on base station 102 are compared by base station.Additionally, base station also stores the information of the position describing different remote antenna unit 108.Base station 102 uses the information relevant with the position of the remote antenna unit 108 to base station 102 relay uplink message to determine the position of mobile device.In alternative embodiments, base station 102 sends the information postponed determined by description to position units 112, and then position units 112 uses this delay information to identify the position of mobile device 140.
Exemplary embodiment
Example 1 includes the system of a kind of position for determining mobile device, described system includes: distributing antenna system, it is configured to going to and relaying from the signal of described mobile device, described distributing antenna system includes: center cell and the multiple remote antenna units being coupled to described center cell, wherein, between the plurality of remote antenna unit and described center cell, the signal of relaying is delayed by so that at least two signal path between the plurality of remote antenna unit from described center cell has different time delay；Being coupled to the base station of described center cell, wherein, described base station receives described signal from described center cell, and determines the delay of the signal of transmission between described mobile device and described base station；And wherein, described system is configured to use described delay determined by described base station to determine the position of described mobile device.
Example 2 includes the system of example 1, wherein, postpones by the parameter in the RF pattern match acting on the position determining described mobile device determined by described base station.
Example 3 includes the system of any one in example 1-2, also includes: being coupled to the position units of described base station, wherein, described position units is configured to based on the position postponing to determine described mobile device determined by described base station,
Example 4 includes the system of example 3, and wherein, described position units is a part for described base station.
Example 5 includes the system of any one in example 1-4, and wherein, between different remote antenna units and the described center cell in the plurality of remote antenna unit, the signal of relaying is configured with certain delay.
Example 6 includes the system of example 5, and wherein, described certain delay is at least one configuration in the designer by described base station, described center cell and described system.
Example 7 includes the system of any one in example 1-6, wherein, described system is configured to determine the position of described mobile device based at least one of the following: described mobile device replaces the received signal strength of at least one signal that base station receives from least one；With the mark of at least one replacement base station described in described mobile device communication.
Example 8 includes the system of any one in example 1-7, and wherein, described distributing antenna system is configured at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out physical delay.
Example 9 includes the system of any one in example 1-8, and wherein, described distributing antenna system is configured at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
Example 10 includes the system of any one in example 1-9, and wherein, at least some in the plurality of remote antenna unit is configured to postpone at least some in the signal of relaying between the plurality of remote antenna unit and described center cell.
Example 11 includes the system of example 10, and wherein, described distributing antenna system is configured to, in reconfigurable mode, at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
Example 12 includes the system of any one in example 1-11, and wherein, at least some in described signal is delayed by the time delay with the persistent period longer than minimum resolution determined by communication protocol.
Example 13 includes the system of any one in example 1-12, and wherein, at least some in described signal is delayed by the time delay with the persistent period shorter than maximum allowable delay defined in the communication protocol used.
Example 14 includes the system of any one in example 1-13, and wherein, the signal received from the plurality of remote antenna unit is combined by described center cell.
Example 15 includes the system of any one in example 1-14, and wherein, the information about described delay is provided by least one of the following: provide the information signal power of described signal associated from described different time delays；And the signal correction that will be received by the plurality of remote antenna unit.
Example 16 includes the system of any one in example 1-15, and wherein, described system is additionally configured to, by being associated with the multipath profile being associated with position by the signal received from described mobile device, determine the position of described mobile device.
Example 17 includes a kind of method of position for determining mobile device, and described method includes: relay signal between mobile device and base station by multiple remote antenna units；By time delay different for the signal delay of relaying between described base station and the different remote antenna units in the plurality of remote antenna unit；Determining the delay of the signal of relaying between described base station and described mobile device, wherein, this signal is relayed by the plurality of remote antenna unit；And the position of described mobile device is determined based on described delay.
Example 18 includes the method for example 17, wherein, includes signal delay digitally postponing described signal.
Example 19 includes the method for any one in example 17-18, wherein, digitally postpones described signal and includes postponing at least some in relayed signal in reconfigurable mode.
Example 20 includes a kind of distributing antenna system, comprising: center cell；And multiple remote antenna unit, it is configured to communicate with at least one mobile device, wherein, the signal relayed between the plurality of remote antenna unit from described center cell along different transmission path is delayed by different time delay, wherein, reception signal from the plurality of remote antenna unit is combined by described center cell, and the signal of combination is sent to base station system, wherein, described base station system determines the time delay of the signal in described composite signal, and position units determines the position of at least one mobile device described.
Example 21 includes the system of example 20, and wherein, described center cell uses analog adder to combine described signal.
Example 22 includes the system of any one in example 20-21, and wherein, described center cell uses digital adder to combine described signal.
Example 23 includes the system of any one in example 20-22, wherein, described distributing antenna system is configured to, in reconfigurable mode, at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
Example 24 includes the system of any one in example 20-23, and wherein, described position units is a part for described base station system.
Although the specific embodiment the most illustrated and described herein, but those of ordinary skill in the art will recognize that being calculated to realize arbitrarily arranging of identical purpose can replace shown specific embodiment.Applicant is intended to arbitrarily adjusting or modification of present disclosure.Therefore, purpose is obviously that present disclosure is only limited by claim and equivalents thereof.
Claims (24)
1., for determining a system for the position of mobile device, described system includes:
Distributing antenna system, it is configured to going to described mobile device and the signal from described mobile device relays, and described distributing antenna system includes:
Center cell；And
It is coupled to multiple remote antenna units of described center cell, wherein, between the plurality of remote antenna unit and described center cell, the signal of relaying is delayed by so that at least two signal path between the plurality of remote antenna unit from described center cell has different time delay；
Being coupled to the base station of described center cell, wherein, described base station receives described signal from described center cell, and determines the delay of the signal of transmission between described mobile device and described base station；And
Wherein, described system is configured to use the position postponing to determine described mobile device determined by described base station.
2. the system as claimed in claim 1, wherein, postpones determined by described base station by the parameter in the RF pattern match acting on the position determining described mobile device.
3. the system as claimed in claim 1, also includes: being coupled to the position units of described base station, wherein, described position units is configured to based on the position postponing to determine described mobile device determined by described base station.
4. system as claimed in claim 3, wherein, described position units is a part for described base station.
5. the system as claimed in claim 1, wherein, described different time delay is configurable.
6. system as claimed in claim 5, wherein, described different time delay is by least one configuration in described base station and described distributing antenna system.
7. the system as claimed in claim 1, wherein, described system is configured to determine the position of described mobile device based at least one of the following:
Described mobile device replaces the received signal strength of at least one signal that base station receives from least one；
With the mark of at least one replacement base station described in described mobile device communication.
8. the system as claimed in claim 1, wherein, described distributing antenna system is configured to: at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out physical delay.
9. the system as claimed in claim 1, wherein, described distributing antenna system is configured to: at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
10. the system as claimed in claim 1, wherein, at least some in the plurality of remote antenna unit is configured to: postpone at least some in the signal of relaying between the plurality of remote antenna unit and described center cell.
11. systems as claimed in claim 10, wherein, described distributing antenna system is configured to: in reconfigurable mode, at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
12. the system as claimed in claim 1, wherein, at least some in described signal is delayed by the time delay with the persistent period more longer than minimum resolution determined by communication protocol.
13. the system as claimed in claim 1, wherein, at least some in described signal is delayed by the time delay with the persistent period more shorter than maximum allowable delay defined in the communication protocol used.
14. the system as claimed in claim 1, wherein, the signal received from the plurality of remote antenna unit is combined by described center cell.
15. the system as claimed in claim 1, wherein, are provided by least one of the following about the information postponed:
The information signal power of described signal associated from described different time delay is provided；And
The signal correction that will be received by the plurality of remote antenna unit.
16. the system as claimed in claim 1, wherein, described system is also configured to, by being associated with the multipath profile being associated with position by the signal received from described mobile device, determine the position of described mobile device.
17. 1 kinds are used for the method determining the position of mobile device, and described method includes:
Between mobile device and base station, signal is relayed by multiple remote antenna units；
By time delay different for the signal delay of relaying between described base station and the different remote antenna units in the plurality of remote antenna unit；
Determining the delay of the signal of relaying between described base station and described mobile device, wherein, this signal is relayed by the plurality of remote antenna unit；And
The position of described mobile device is determined based on described delay.
18. methods as claimed in claim 17, wherein, include digitally postponing described signal by described signal delay.
19. methods as claimed in claim 17, wherein, digitally postpone described signal and include: postpone with at least some in the reconfigurable mode signal to being relayed.
20. 1 kinds of distributing antenna systems, including:
Center cell；And
Multiple remote antenna units, it is configured to communicate with at least one mobile device, and wherein, the signal relayed between the plurality of remote antenna unit from described center cell along different transmission path is delayed by different time delay,
Wherein, reception signal from the plurality of remote antenna unit is combined by described center cell, and the signal of combination is sent to base station system, wherein, described base station system determines the time delay of the signal in described composite signal, and position units determines the position of at least one mobile device described.
21. systems as claimed in claim 20, wherein, described center cell uses analog adder to be combined described signal.
22. systems as claimed in claim 20, wherein, described center cell uses digital adder to be combined described signal.
23. systems as claimed in claim 20, wherein, described distributing antenna system is configured to: in reconfigurable mode, at least some in the signal of relaying between the plurality of remote antenna unit and described center cell is carried out digital delay.
24. systems as claimed in claim 20, wherein, described position units is a part for described base station system.
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| PCT/US2014/057825 WO2016048370A1 (en) | 2014-09-26 | 2014-09-26 | Systems and methods for location determination |
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