CN1937846B - Mobile communication system - Google Patents
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- CN1937846B CN1937846B CN2006101416999A CN200610141699A CN1937846B CN 1937846 B CN1937846 B CN 1937846B CN 2006101416999 A CN2006101416999 A CN 2006101416999A CN 200610141699 A CN200610141699 A CN 200610141699A CN 1937846 B CN1937846 B CN 1937846B
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Abstract
A kind of mobile communication system. The mobile station according to the begin time location of the CDMA pulse train signal which is received from the wireless base station and the indication of the wireless base station, sending the time difference removed the fixed time difference which is between the begin time location of the CDMA pulse train signal to the wireless base station, measure the distance of the mobile station and the adjacent multi-wireless base stations, using the measurement result for the judgment of the change, and establish frame synchronization in high-precision between the wireless base station, several wireless base stations work in the conditions that the same frame is synchronous.
Description
The application is dividing an application of following application, denomination of invention: mobile communication system; Application number: 1997198643.6; The applying date: on August 8th, 1997.
Technical field
The present invention relates to adopt time division multiple access (Time Division MultipleAccess; To call TDMA in the following text) mode or time division CDMA (Time-Divided CodeDivision Multiple Access; To call Time Division-Code Division Multiple Access in the following text) the realization channel sharing or the shared mobile communication system of time slot of mode, particularly relate between wireless base station and the mobile radio station or the measurement and the utilization thereof of wireless base station distance each other and obtain and keep between wireless base station and the mobile radio station or the mobile communication system of wireless base station frame synchronization each other.
Technical background
Mobile communication system is mainly by for example vehicle-carried mobile communicator or move (to call mobile radio station in the following text) and the wireless base station formations by communicating between wireless channel and this mobile radio station such as carrying communicator.In such mobile communication system, sometimes at frequency division multiple access (Freguency Division Multiple Access; To call FDMA in the following text) carry out the identical sharing of the radio frequency spectrum (shared) that produces by different wireless modes between mode or TDMA mode and the CDMA mode to call channel in the following text.In addition, the channel of having implemented between the different sign indicating numbers about the CDMA mode is shared.
In this respect, though at the U.S. Patent application of applying in addition 08/524, the shared mobile communication system of time slot about shared tdma signal in same time slot and Time Division-Code Division Multiple Access signal is disclosed in No. 974 grades, but in these documents, do not speak of the range determination problem between mobile radio station and the wireless base station, the stationary problem between the yet undeclared wireless base station.
In addition, the technology of and mobile communication system that channel shared shared and about using local wireless loop (Wireless Local Loop about time slot; To call WLL in the following text) the wireless base station of semifixed communicator (to call WLL station in the following text) etc. between synchronous technology also exist., in these technology, do not touch between mobile radio station and the wireless base station range determination or by the stationary problem between the wireless base station of sheet speed (チ Star プ レ one ト) unit decision.
In addition, as the mobile communication system of shared a plurality of CDMA signals, known have United States Patent (USP) No. 5363403., in its specification, do not put down in writing the method for handling the Time Division-Code Division Multiple Access signal.As other mobile communication system, known have United States Patent (USP) No. 5511068, but it is the problem about the sef-adapting filter in the cdma system of time-division, does not speak of the shared problem of channel of carrying out CDMA signal and tdma signal in a time slot in its specification.
In addition, in the mobile communication system described in the open WO96/18277 document in the world is about grand diversity (マ Network ロ ダ イ バ one シ テ イ) technology, switching station also compares the communication quality of the information that receives simultaneously from a plurality of wireless base stations, only select the communication quality the best, its result can not use the also record and the problem of Time Division-Code Division Multiple Access technical combinations in its specification effectively in conversion etc.
In addition, as using sheet sign indicating number (チ Star プ コ one De) to measure the mobile communication system of the distance between mobile radio station and the wireless base station, known have No. the 5506864th, United States Patent (USP) and United States Patent (USP) No. 5365544.; what these patents related to is the mobile communication system of connecting-type CDMA mode; in its specification; except sign indicating number is led in expansion; though have to use class (Generic) to lead the record of sign indicating number as the content of feature; but not mobile communication system, do not touch the character of utilizing frame structure or Time Division-Code Division Multiple Access mode, measure the problem of the distance between mobile radio station and the wireless base station about the Time Division-Code Division Multiple Access mode.
In addition, about the document of the frame synchronization aspect between the wireless base station in the mobile communication system, known have United States Patent (USP) No. 5440561., the TDMA mode only has been described in its specification, has not spoken of the Time Division-Code Division Multiple Access mode, supposed it is under the situation of the unit center of tortoise plastron type, aspect the configuration of wireless base station, also do not carried out the investigation of the dissimilar situation of distance between the wireless base station.
In addition, as document, also have Japanese kokai publication hei 8-23569 number, Japanese kokai publication hei 8-33037 number and Japanese kokai publication hei 7-46660 number about the frame synchronization aspect between the wireless base station in the mobile communication system.
Such record is arranged in [claims] in the specification of above-mentioned Japanese kokai publication hei 8-23569 number and Japanese kokai publication hei 8-33037 number: " its time difference be TDMA/TDD a burst length n doubly ".This is the feature that adopts the TDMA mode of satellite communication, and is irrelevant with mobile communication system on the ground.Promptly, in the mobile communication system on the ground, because the distance that the distance between mobile radio station and the wireless base station does not resemble between the communication satellite and the earth is so long, so such situation can not take place, also do not have such situation in addition in multiframe: posting a letter with a certain frame in the wireless base station, and posts a letter with another frame in the subordinate wireless base station.In above-mentioned specification, do not record and narrate frame synchronization problem in addition about the sheet speed unit of Time Division-Code Division Multiple Access mode yet.
In addition, comprise the information that expression sends to the TDMA control signal which time slot in the tdma frame in above-mentioned Japanese kokai publication hei 7-46660 number the control information, really under the long situation of frame, or set in the system of several Control information time slot at needs, such regulation also is necessary.; considering to use first time slot in the frame to send and receive under the situation of control signal as the mobile communication system of prerequisite; do not need to comprise the information of representing above-mentioned information in the control signal; in addition; in first time slot with when having set a plurality of TDMA channels, can also set in the mobile communication system of a plurality of Time Division-Code Division Multiple Access control channels, not need to use the technology described in this Japanese kokai publication hei 7-46660 number.
Like this, as the mobile communication system that is made of more than one wireless base station that communicates by a plurality of mobile radio stations and wireless channel, known so far have an above various system.In such mobile communication system, under the situation of using TDMA mode and Time Division-Code Division Multiple Access mode, between different wireless base stations, need on time shaft, establish frame synchronization.
In addition, though can use global positioning system (Global PositioningSystem; To call GSP in the following text) moment shows signal, carry out the establishment of the frame synchronization between this wireless base station, but for this reason all the wireless base station all need to equip the GPS receiving system, and these wireless base stations also must be arranged on the place that can receive gps signal.
, at PCS Personal Communications System (Persona1 Communication System; To call PCS in the following text) etc. in, the wireless base station that also has be arranged on indoor or underground installation in, in the case in order to use gps signal, have the problem that needs complicated apparatus.
The present invention finishes in order to solve above-mentioned problem, its purpose is to obtain a kind of like this mobile communication system: control channel is distributed to tdma signal or Time Division-Code Division Multiple Access signal, between a plurality of wireless base stations of a plurality of users (will provide all communication work persons in the system of such mobile communication service to be called the user usually) etc., establish frame synchronization, can measure the distance between mobile radio station and the wireless base station in addition exactly, change judgement.
Disclosure of an invention
The mobile communication system of claim 1 of the present invention is a kind of like this system: measure the beginning time location of the pulse train that receives from the wireless base station and the time difference after the set time, difference was removed of the beginning time location of the pulse train that sends for the beginning at time slot arrives the wireless base station in mobile radio station, with this information notice wireless base station.Therefore, can realize measuring exactly the mobile communication system of the distance between wireless base station and the mobile radio station.
The mobile communication system of claim 2 of the present invention is a kind of like this systems: the mobile communication system of the shared mode of TDMA/ Time Division-Code Division Multiple Access in the time slot that the frame that adopts time slot with the Time Division-Code Division Multiple Access mode to be inserted into the TDMA mode constitutes, in mobile radio station, measure the time difference after the set time, difference was removed of the beginning time location of pulse train that receives from the wireless base station and the pulse train that sends for the beginning at time slot arrives the wireless base station, with this information notice wireless base station.
The mobile communication system of claim 3 of the present invention is a kind of like this systems: measure from the beginning time location of the collection of letters burst signal of wireless base station and time difference after the set time, difference was removed of beginning time location of giving the burst signal of posting a letter of wireless base station with the sheet speed unit that uses in the Time Division-Code Division Multiple Access communication in the mobile radio station.
The mobile communication system of claim 4 of the present invention is a kind of like this systems: and the conversation in beyond the wireless base station between, the beginning time location of the pulse train that measurement receives from this wireless base station and send to time difference after the set time, difference was removed of beginning time location of the pulse train of this wireless base station is with the wireless base station in this information notice conversation.
The mobile communication system of claim 5 of the present invention is a kind of like this systems: have in mobile radio station: the relevant collection of letters/anti-extended coding operational part that takes out original signal from the spread coded signals that the wireless base station is sent here; Time Division-Code Division Multiple Access signal to anti-extended coding carries out demodulation, takes out the CH collection of letters/TDMA demodulation section of required signal; Information signal is carried out giving after the analogy decode digital-analog conversion portion of man machine interface portion according to the signal that takes out; Information signal from man machine interface portion is carried out digitally coded analog-to-digital conversion portion; The multiplexed CH of signal that compiled sign indicating number is posted a letter/the multiplexed portion of TDMA; The extended coding operational part that multiplexed information is expanded on frequency axis; Instruction according to the wireless base station, control adjustment the launch time of paired pulses string signal, measure the beginning time location of the pulse train that receives from the wireless base station and send to time set time measurement portion in the pulse train control/frame of the time difference after the set time, difference was removed of beginning time location of pulse train of this wireless base station; And sheet speed takes place and distribute to the extended code generator sheet rate generator of the extended code of our station.
The mobile communication system of claim 6 of the present invention is a kind of like this systems: have a plurality of signal processing parts and distribute for the signal of each signal processing part and the signal allocation addition operation division of add operation to input and output in the wireless base station, above-mentioned a plurality of signal processing parts have respectively: the relevant collection of letters/anti-extended coding operational part; The CH collection of letters/TDMA demodulation section; Information signal is exported to the transformation component that network interface portion uses; The transformation component of using from network interface portion input information signal; CH posts a letter/the multiplexed portion of TDMA; The extended coding operational part; Time set time measurement portion in the pulse train control/frame; And extended code generator sheet rate generator.
The mobile communication system of claim 7 of the present invention is a kind of like this systems: at least a portion signal processing part of wireless base station, to decipher the transformation component of usefulness as digitaltoanalogconversion portion to information signal, to collect mail by CH/export to the analog network interface portion after signal imitation that the TDMA demodulation section takes out is decoded into information signal, to encode the transformation component of usefulness as analog-to-digital conversion portion to information signal, the information signal from the input of analog network interface portion will be carried out digital coding.
The mobile communication system of claim 8 of the present invention is a kind of like this systems: have the multiplexing separated part that the information signal that comprises in the time slot to our station separates with control information in the CH of the mobile radio station collection of letters/TDMA demodulation section; And information signal memory and the control information memory of temporarily storing these information signals and control information, CH at mobile radio station posts a letter/and have among multiplexed of the TDMA in the time slot of distributing to our station after synthetic these information signals and the control information and carry out multiplexed multiplexing synthetic portion, in mobile radio station, be provided with simultaneously the control information from the wireless base station is deciphered, according to the information after the decoding, this mobile radio station is indicated various functions, the control information processor that its response pass is used to the wireless base station.
The mobile communication system of claim 9 of the present invention is a kind of like this systems: in first processing procedure, at first use the TDMA control channel of appointment, with the wireless base station between carry out communicating by letter of required control information, then, if the Time Division-Code Division Multiple Access talk channel is designated, then in the 3rd processing procedure, converse with the Time Division-Code Division Multiple Access talk channel, if the TDMA talk channel is designated, then in second processing procedure, converse with the TDMA talk channel.Therefore, add at first at mobile radio station under the situation of this system, at first use the TDMA control channel, according to obtaining roughly synchronous TDMA character rate in time easily, frame information from the wireless base station is established frame synchronization, then, can establish synchronously with the sheet speed of the Time Division-Code Division Multiple Access that precision is higher in time.
The mobile communication system of claim 10 of the present invention is a kind of like this systems: in first processing procedure, time difference after set time, difference was removed of beginning time location with information symbol rate is measured the beginning time location of the TDMA control signal pulse train that the wireless base station sends and given the TDMA control signal pulse train of wireless base station, send this information to wireless base station.Therefore, in first processing procedure, measure to send the time difference after the set time, difference was removed of the beginning time location of pulse train by the information symbol number, do not use Time Division-Code Division Multiple Access, only use the signal bursts of TDMA, with regard to the distance of energy measurement mobile radio station and wireless base station.
The mobile communication system of claim 11 of the present invention is a kind of like this systems: in second processing procedure, sheet speed unit with Time Division-Code Division Multiple Access, time difference after set time, difference was removed of beginning time location of measuring the beginning time location of the TDMA conversation signal pulse train that the wireless base station sends and giving the TDMA conversation signal pulse train of wireless base station, send this information to wireless base station.Therefore, talk channel is not only TDMA, and can carry out time measurement with the sheet speed unit of Time Division-Code Division Multiple Access.That is, the time measurement of carrying out with sheet speed is wanted fast tens of times to hundreds of times usually than the information symbol rate with TDMA, if so measure with fast sheet speed, the precision of time difference can be improved its corresponding multiple.
The mobile communication system of claim 12 of the present invention is a kind of like this systems: in the 3rd processing procedure, with Time Division-Code Division Multiple Access sheet speed unit, time difference after set time, difference was removed of beginning time location of measuring the beginning time location of the Time Division-Code Division Multiple Access conversation signal pulse train that the wireless base station sends and giving the Time Division-Code Division Multiple Access conversation signal pulse train of wireless base station, send this information to wireless base station.Therefore, talk channel is a Time Division-Code Division Multiple Access, and can carry out time difference measurements at high speed with the sheet speed of Time Division-Code Division Multiple Access.
The mobile communication system of claim 13 of the present invention is a kind of like this systems: mobile radio station measure with sheet speed unit and the wireless base station between time difference after the set time, difference was removed of beginning time location of the pulse train received and dispatched, send this value to wireless base station, mobile exchange station is according to the time difference information of being collected by this wireless base station, calculate the distance of wireless base station and mobile radio station, and store this range information.According to this range information, determine conversion, can avoid mobile radio station and wireless base station both sides unnecessarily to launch the forceful electric power ripple.
The mobile communication system of claim 14 of the present invention is a kind of like this systems: the distance in mobile exchange station between the wireless base station of supervision mobile radio station and periphery, if the wireless base station also nearer than the wireless base station of present connection arranged, then can send the sign on of conversion, so as to reset and this wireless base station between wireless loop.
The mobile communication system of claim 15 of the present invention is a kind of like this systems: be under another user's the situation of wireless base station in nearest wireless base station, from the mobile exchange station of mobile exchange station, send the sign on of changing to this wireless base station by sharing system and this user.Therefore, between all wireless base stations of different users, also can change
The mobile communication system of claim 16 of the present invention is a kind of like this systems: measure the beginning time location between the burst signal that receives from the trunk base station and the time difference after the set time, difference was removed of the beginning time location of the pulse train that sends for the beginning at time slot arrives the trunk base station in slave base stations, send this metrical information to the trunk base station.Therefore, can realize measuring exactly the mobile communication system of the distance between trunk base station and the slave base stations.
The mobile communication system of claim 17 of the present invention is a kind of like this systems: the TDD mobile communication system of the shared mode of TDMA/ Time Division-Code Division Multiple Access in the time slot that the frame that adopts time slot with the Time Division-Code Division Multiple Access mode to be inserted into the TDMA mode constitutes, in slave base stations, measure the time difference after the set time, difference was removed of the beginning time location of pulse train that receives from the trunk base station and the pulse train that sends for the beginning at time slot arrives the trunk base station, with this information notice trunk base station.Therefore, in the TDD mobile communication system of TDMA mode and time-division CDMA mode, the frame synchronization between the wireless base station can be established, the interference between the time slot can be avoided.
The mobile communication system of claim 18 of the present invention is a kind of like this systems: measure from the beginning time location of the collection of letters burst signal of trunk base station and time difference after the set time, difference was removed of beginning time location of giving the burst signal of posting a letter of trunk base station with the sheet speed unit that uses in the Time Division-Code Division Multiple Access communication in the slave base stations.
The mobile communication system of claim 19 of the present invention is a kind of like this systems: identification from the Time Division-Code Division Multiple Access control signal collection of letters pulse train of slave base stations whether on suitable burst location, if on suitable burst location, then after sending qualified information to the trunk base station, will differ from the information of the time difference after being removed the set time and send the trunk base station to.
The mobile communication system of claim 20 of the present invention is a kind of like this systems: if departed from suitable burst location from the collection of letters burst signal of slave base stations, then will send slave base stations to this runout information that the sheet speed unit of Time Division-Code Division Multiple Access mode measures, the slave base stations of receiving this information is revised the beginning time location of the burst signal of giving the trunk base station in time according to this runout information.By carrying out this processing procedure repeatedly, can establish the frame synchronization between the wireless base station.
The mobile communication system of claim 21 of the present invention is a kind of like this systems: when slave base stations detects the beginning time location of collection of letters burst signal, the transmission of the burst signal in the time slot that this slave base stations stops should to send originally receives the time-division element value control signal pulse train that is sent by the trunk base station.
The mobile communication system of claim 22 of the present invention is a kind of like this systems: after the trunk base station assert that the pulse train that is received is in suitable position, send this qualified information to slave base stations, the time difference information of receiving the beginning time location of the burst signal that the slave base stations of this information will be accepted and send sends the trunk base station to, thereby form the TDD mobile communication system, TDMA control signal pulse train and time-division CDMA control signal pulse train are given the beginning time slot of each frame in the trunk base station.Therefore, in the TDD mobile communication system of TDMA mode and time-division CDMA mode, the frame synchronization between the wireless base station can be established, the interference between the time slot can be avoided.
The mobile communication system of claim 23 of the present invention is a kind of like this systems: the trunk base station starts the time slot that does not send TDMA control signal pulse train and time-division CDMA control signal pulse train at it, accepts TDMA control signal pulse train and time-division CDMA control signal pulse train from slave base stations.
The mobile communication system of claim 24 of the present invention is a kind of like this systems: the trunk base station is being accepted from the TDMA control signal pulse train of slave base stations and the time slot of time-division CDMA control signal pulse train, although this time slot is originally the downgoing line (Down-Link) of trunk base station, but will end transmission, and carry out reception from the TDMA control signal pulse train and the time-division CDMA control signal pulse train of slave base stations.
The mobile communication system of claim 25 of the present invention is a kind of like this systems: when the trunk base station sends synchronizing information to a plurality of slave base stations, the trunk base station sends TDMA control signal pulse train and time-division CDMA control signal pulse train, when each slave base stations sends synchronizing information to above-mentioned trunk base station, each slave base stations sends TDMA control signal pulse train or Time Division-Code Division Multiple Access control signal pulse train.Therefore, between a trunk base station and a plurality of slave base stations, can obtain the frame synchronization of the precision that reaches Time Division-Code Division Multiple Access sheet speed unit simultaneously.
The mobile communication system of claim 26 of the present invention is a kind of like this systems: at first use the TDMA control channel, use the Time Division-Code Division Multiple Access control channel then, establish the frame synchronization between the wireless base station, the shift time of the beginning time location of the burst signal that slave base stations is sent and receives deposits memory in.Therefore, even can not upgrade under the state of control information between the trunk base station, if the information of the shift time of the beginning time location of the Time Division-Code Division Multiple Access control channel that utilization is received and this storage then can easily be avoided the interference between the time slot.
The mobile communication system of claim 27 of the present invention is a kind of like this systems: the frame synchronization between the wireless base station that is undertaken by the Time Division-Code Division Multiple Access control channel is in case establish, use the time slot that has received from the Time Division-Code Division Multiple Access control signal of slave base stations in leading to the downgoing line of a plurality of mobile radio stations the trunk base station as talk channel.Therefore, can more effectively utilize time slot.
The mobile communication system of claim 28 of the present invention is a kind of like this systems: under the situation that amount of information has reduced, when the Time Division-Code Division Multiple Access control signal pulse train that receives from slave base stations, the time slot that will use in the downgoing line of a plurality of mobile radio stations begins to establish the frame synchronization between the wireless base station again as talk channel usefulness.
The mobile communication system of claim 29 of the present invention is a kind of like this systems: when establishing the frame synchronization between the wireless base station, after the frame synchronization of having established the TDMA control channel, judge whether to use the Time Division-Code Division Multiple Access control channel, if cannot use, carry out the frame synchronization of TDMA control channel repeatedly, if can use, just carry out the frame synchronization of Time Division-Code Division Multiple Access control channel.Therefore,,, establish the frame synchronization between the wireless base station, can use minimal system by using the TDMA control channel even can not use in the communication of the control signal between the wireless base station under the situation of time slot of Time Division-Code Division Multiple Access.
The simple declaration of accompanying drawing
Fig. 1 is the system construction drawing of all structures of the mobile communication system of expression embodiments of the invention 1.
Fig. 2 is the key diagram of expression from the relation of the time delay of electric wave mobile radio station of the wireless base station emission different with the foregoing description 1.
Fig. 3 is the key diagram that the relation of the time delay from the wireless base station of the electric wave of the mobile radio station of the foregoing description 1 emission has been received in expression.
Fig. 4 is the block diagram of the structure of the TDMA/ Time Division-Code Division Multiple Access mobile radio station in expression the foregoing description 1.
Fig. 5 is the block diagram of the structure of the TDMA/ Time Division-Code Division Multiple Access wireless base station in expression the foregoing description 1.
Fig. 6 is the block diagram of one of the pulse train timing set-up function example in the mobile radio station of expression the foregoing description 1.
Fig. 7 and Fig. 8 are the key diagrams of one of frame structure example of the TDMA/ Time Division-Code Division Multiple Access communication system of expression embodiments of the invention 2.
Fig. 9 is the flow chart that the pulse train of the mobile radio station of expression the foregoing description 2 starts the processing procedure of timing control.
Figure 10 is the block diagram of structure of the mobile exchange station of expression embodiments of the invention 3.
Figure 11 is the key diagram that the mode of expression the foregoing description 3 is set one of the mobile radio station stored in the memory of processor and the range information between the wireless base station on every side example.
Figure 12 is the mobile radio station and range determination between the wireless base station of expression the foregoing description 3 and the flow chart of changing the control procedure of beginning.
Figure 13 is the key diagram of one of the TDMA control channel/Time Division-Code Division Multiple Access control channel used of frame synchronization of expression embodiments of the invention 4 example.
Figure 14 is the key diagram that expression distributes the transceiver of above-mentioned time slot shown in Figure 13.
Figure 15 is the key diagram of one of the TDMA control channel/Time Division-Code Division Multiple Access control channel used of frame synchronization of expression embodiments of the invention 5 example.
Figure 16 is the key diagram that expression distributes the transceiver of above-mentioned time slot shown in Figure 15.
Figure 17 is the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel of using of the frame synchronization in the TDMA/ Time Division-Code Division Multiple Access coexistence TDD system of expression embodiments of the invention 6 example.
Figure 18 is the key diagram that expression distributes the transceiver of above-mentioned time slot shown in Figure 17.
Figure 19 is the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel of using of the frame synchronization in the TDMA/ Time Division-Code Division Multiple Access coexistence FDD system of expression embodiments of the invention 6 example.
Figure 20 is the key diagram that expression distributes the transceiver of above-mentioned time slot shown in Figure 19.
Figure 21 is the trunk base station of expression embodiments of the invention 7 and the flow chart of the frame synchronization control procedure between the adjacent slave base stations.
Figure 22 is the trunk base station of expression embodiments of the invention 8 and the flow chart of the frame synchronization control procedure between the adjacent slave base stations.
Figure 23 and Figure 24 are the key diagrams that expression distributes the transceiver of each time slot of the foregoing description 8.
The preferred example of the usefulness that carries out an invention
Below, in order to illustrate in greater detail the present invention, implement the preferred example that the present invention uses according to description of drawings.
Fig. 1 is the system construction drawing that all structures of the shared mobile communication system of time slot share channel of the present invention are used in expression.1,2 and 3 is wireless base stations among the figure, and 4 and 5 is this wireless base station 1 or 2 radio coverage (to call the unit in the following text) that constitute.In addition, unit 4 comprises zone 11,12 and 13.Unit 5 comprises zone 21,22 and 23.31,32,33 and 34 are the vehicle-carried mobile communicators of communicating by letter with wireless base station 1,2 by wireless channel or move mobile radio stations (MS) such as carrying communicator, and 41 and 42 is by the WLL that wireless channel is communicated by letter with wireless base station 1,2 stand (WS).
The 6th, control wireless base station 1 and 3 mobile exchange station (MSC; Mobile SwitchingCenter), the 7th, the mobile exchange station of control wireless base station 2.The 8th, the sharing system (PSTN of this mobile exchange station 6 and 7 wired connections; Public Switching TelephoneNetwork).
This embodiment 1 is about the range determination mode between the mobile radio station wireless base station in the TDMA/ Time Division-Code Division Multiple Access mode and the embodiment of machine thereof, below the Determination of distance between this mobile radio station of explanation and the wireless base station.
In addition, the communication between the mobile radio station 31～34 in the mobile communication system of the present invention and WLL station 41,42 and wireless base station 1,2 and 3, frequency of utilization offset modulation (FSK; FreguencyShift Keying), BPSK, QPSK, DQPSK, PI/4-DQPSK equiphase offset modulation (PSK; Phase Shift Keying) or minimum phase offset modulation (MSK such as QAMSK or QGMSK; Minimum Phase Shift Keying) modulation signal of digital modulation mode such as, carry out access according to overloading frequency time-division multiple access (TDMA) (Multi-carriersTDMA) mode and time-division CDMA mode, pass through in addition by TDMA/ frequency division two-way communication (Frequency Division Duplex; To call FDD in the following text), TDMA/ time-division two-way communication (Time Division Duplex; To call TDD in the following text), the two-way communication carried out of Time Division-Code Division Multiple Access/FDD or Time Division-Code Division Multiple Access/TDD, carry out wireless connections.
In addition, this is a kind of shared mobile communication system of time slot share channel that the shared Time Division-Code Division Multiple Access channel of FDMA/TDD digital signal and TDMA digital signal and time slot share channel (to call shared channel in the following text) is arranged on frequency axis, the tdma signal that is in the same time slot of same channel is made of a plurality of signals, each tdma signal is owing to have the synchronous code that has nothing in common with each other, so be the shared tdma signal of the shared time slot share channel of synchronous code that to discern, and this is a kind ofly to have this tdma signal and WLL that the shared time slot of channel of time slot share channel shared (comprising the situation that non-channel is shared) Time Division-Code Division Multiple Access signal is shared and move and use communication system.
Fig. 2 be in the expression mobile radio station with the sequential chart of the relation of the time delay of the electric wave of launching from different wireless base station, mobile radio station 32 (MS32) has been shown in this Fig. 2 has been under the situation of position shown in Figure 1, the electric wave of the burst mode of launching from each wireless base station 1,2 and 3 (BS1, BS2 and BS3) arrives the time relationship of this mobile radio station 32.
In Fig. 1, suppose that mobile radio station 32 just carries out wireless connections with wireless base station 1 now and communicates by letter.At this moment, the Time Division-Code Division Multiple Access burst signal electric wave of 1 emission postpones to arrive mobile radio station 32 based on the time of delay of the distance between wireless base station 1 and the mobile radio station 32 from the wireless base station.In Fig. 2, the pulse train 51 that the electric wave of 1 emission is used as " time slot # 0 " from this wireless base station illustrates, and has postponed time of delay and the electric wave that arrives mobile radio station 32 is used as the pulse train 52 of " the delay ripple of time slot # 0 " and illustrates.In addition, represent with time T2 this time of delay.
In addition, in wireless base station 1 or mobile radio station 32, can not directly measure this time of delay.Therefore, as shown in Figure 3, according to the indication of wireless base station 1, the front and back adjustment is given the launch time of the Time Division-Code Division Multiple Access burst signal electric wave of wireless base station 1 from mobile radio station 32, and when setting this electric wave and arriving wireless base station 1, its beginning becomes the beginning time location of time slot.In this Fig. 3, the pulse train 61 that the electric wave that sends from this mobile radio station 32 is used as " electric wave from mobile radio station 32 transmissions that arrives wireless base station 1 in the beginning of time slot " illustrates, and the pulse train 62 that the electric wave that has arrived wireless base station 1 is used as " the delay ripple that has arrived wireless base station 1 than the forward electric wave that sends from mobile radio station 32 of the beginning value of time slot " illustrates.
As shown in Figure 3, in the case, the pulse train 61 that mobile radio station 32 sends is than the beginning time location T8 pre-set time emission of time slot, so that pulse train 62 arrives wireless base station 1 at the beginning time location of time slot.The time difference T8 of this pulse train 61 and pulse train 62 is the time of the same distance of radio wave propagation, thus with the time difference T2 identical (T2=T8) of pulse train 51 and pulse train 52.In addition, the time difference T7 of the beginning time location of pulse train 52 and the beginning time location of pulse train 61 can be by the counting clock pulse number in mobile radio station 32, and speed unit measures with sheet.The information that is obtained sends wireless base station 1 to by mobile radio station 32.
Here, as mentioned above, because the time difference T2 of pulse train 51 and pulse train 52 equates with the time difference T8 of pulse train 61 and pulse train 62, so following formula (1) establishment.Therefore, the beginning time location of time slot is positioned at the middle of time difference T7.
T7＝T2+T8＝2÷T2......(1)
In addition, the speed of supposing electric wave is C, and at this moment the distance D 1 of mobile radio station 32 and wireless base station 1 is provided by following formula (2).
D1＝(T7/2)×C＝T2÷C......(2)
In addition, as shown in Figure 2, another wireless base station for example behind 53 elapsed time of the pulse train T4 of the electric wave of wireless base station 2 emission, arrives mobile radio stations 32 as pulse train 54.Though at this moment can not directly measure this time of delay of T4,, can know from the beginning of the pulse train 54 of this wireless base station 2 with from the time difference T3 of the beginning of the pulse train 52 of wireless base station 1 by counting clock pulse in mobile radio station 32.If use this time difference T3, and the speed of establishing electric wave is C, then can obtain the distance of wireless base station 2 and mobile radio station 32 by following formula (3).
D2＝T4÷C＝(T2-T?3)÷C......(3)
Equally, the beginning of the pulse train 56 that is received behind 55 elapsed time of the pulse train T6 with the electric wave of wireless base station 3 emission and from the time difference T5 of the beginning of the pulse train 52 of wireless base station 1, and the speed of establishing electric wave is C, then can obtain the distance D 3 of another wireless base station 3 and mobile radio station 32 by following formula (4).
D3＝T6÷C＝(T2-T5)÷C......(4)
In addition, these information also are transmitted to the wireless base station 1 of present wireless connections from mobile radio station 32.
Here, Fig. 4 is the block diagram of structure of the TDMA/ Time Division-Code Division Multiple Access mobile radio station of the function of expression with the distance between above-mentioned the sort of mensuration mobile radio station and the wireless base station.Among the figure, the 71st, antenna, the 72nd, the transceiver dispenser that the signal that receives with this antenna 71 and the signal that sends with antenna 71 are distributed, the 73rd, the RF (radio frequency that the signal with antenna 71 receptions is amplified; Radio Frequency) receiving part, the 74th, the RF that the signal that sends from antenna 71 the is amplified portion that posts a letter.In addition, above-mentioned transceiver dispenser 72 can realize with transceiver toggle switch under the situation of TDD, can realize with wireless separation filter under the situation of FDD.
The 75th, the relevant collection of letters/anti-extended coding operational part, it has following function: the extended code that will distribute to our station multiplies each other (Gray code computing) with the spread coded signals (CDMA signal) that the coding back sends from the wireless base station, takes out the original signal (the relevant collection of letters) that is not expanded coding.In addition, under the situation of TDMA,, should not work by the relevant collection of letters/anti-extended coding operational part 75 owing to do not need to carry out anti-extended coding.The 76th, the channel collection of letters/TDMA demodulation section (to call the CH collection of letters/TDMA demodulation section in the following text), it has following function: the function that the Time Division-Code Division Multiple Access signal behind the anti-extended coding is carried out demodulation or modulation signal carried out demodulation under the situation of tdma signal, and according to by the form of the signal after the demodulation, take out required signal (multiplexing separation), the signal of this taking-up is supplied with the function of this Signal Processing part.
The 77th, as the error correction/sound decoding part of digital-analog conversion portion, be used for collecting mail from CH/error correction of the information (digital signal) that TDMA demodulation section 76 is supplied with after, according to this information voice signal is deciphered, and it is exported as information, supply with not shown man machine interface portion.The 78th, as the error correction/acoustic coding portion of analog-to-digital conversion portion, be used for the voice signal of supplying with from man machine interface portion is carried out digital coding, and bug patch code is added on this volume sign indicating number excessively.
The 79th, channel is posted a letter/multiplexed of TDMA (posting a letter to call CH in the following text/the multiplexed portion of TDMA), it has following function: make digital sound information or other control informations after error correction is encoded multiplexed, the information combination that this is multiplexed is in the frame format in the required time slot, and with its output.The 80th, the extended coding operational part, it has following function: use the extended code distribute to our station, with should the expansion of multiplexed information, output it to the RF portion 74 that posts a letter on frequency axis.In addition, under the situation of TDMA, do not need to carry out this expansion, so this extended coding operational part 80 is not worked.
Here, above-mentioned each one is identical with each one of the mobile radio station of common TDMA/ Time Division-Code Division Multiple Access mode.
In addition, the 81st, time set time measurement portion in the pulse train control/frame, it has following function: according to the instruction of wireless base station, according to the information of being undertaken by extended coding operational part 80 behind the extended coding, control and adjustment are by the launch time of the burst signal (pulse train 61 among Fig. 3 etc.) of our station emission, be set in which time slot emission electric wave (time set in the frame), again with the time difference T7 among the mensuration Fig. 3 of sheet speed unit that uses in the time-division cdma communication.CH posts a letter/multiplexed 79 of TDMA 81 controls of time set time measurement portion and output signal in time of adjusting in by this pulse train control/frame.The 82nd, extended code generator sheet rate generator, be used for taking place sheet speed that this Time Division-Code Division Multiple Access communication uses and the extended code of distributing to our station, and with their supply with time set time measurement portion 81 in pulse train control/frame, the be correlated with collection of letters/anti-extended coding operational part 75, extended coding operational part 80 etc.
Secondly, the working condition of the mobile radio station that constitutes like this is described.
The coding back is received by antenna 71 from the electric wave of wireless base station emission, is fed to RF receiving part 73 by 72 distribution of transceiver dispenser.RF receiving part 73 will be given the relevant collection of letters/anti-extended coding operational part 74 after will being amplified by the signal that antenna 71 receives.Time Division-Code Division Multiple Access signal times behind the extended coding that 74 pairs of relevant collections of letters/anti-extended coding operational parts are sent here from this RF receiving part 73 is with the extended code of distributing to our station of extended code generator sheet rate generator 82 generations, carry out the Gray code computing, turn back to the original signal that does not carry out extended coding.
Be fed to the CH collection of letters/TDMA demodulation section 76 by this Time Division-Code Division Multiple Access signal that relevant collection of letters/anti-extended coding operational part 75 has carried out anti-extended coding and carry out demodulation.The CH collection of letters/TDMA demodulation section 76 takes out required signal from the form of the signal of this demodulation again, the signal of this taking-up is supplied with this Signal Processing part of time set time measurement portion 81 in error correction/sound decoding part 77 or the pulse train control/frame etc.Error correction/sound decoding part 77 is revised from the information errors of the digital signal of these CH collection of letters/TDMA demodulation section 76 supplies, again it is carried out analog converting, and voice signal is deciphered, and it is exported supplier-machine interface portion as information.
On the other hand, carry out digital coding by 78 pairs of voice signals of supplying with from man machine interface portion of error correction/acoustic coding portion, with the sign indicating number of the usefulness that corrects mistakes be added in sign indicating number that this volumes crosses upward after, give CH to post a letter/multiplexed 79 of TDMA.CH posts a letter/and multiplexed 79 of TDMA makes from the digital sound information of this error correction/acoustic coding portion 78 or other control informations multiplexed, in the required time slot of the information combination that this is multiplexed in the frame format, control situation along with time set time measurement portion 81 in the pulse train control/frame, in the moment of having revised by the emission of the electric wave of wireless base station appointment, export this signal.
Here, time set time measurement portion 81 bases are from the CH collection of letters/TDMA demodulation section 76 signal supplied in the pulse train control/frame, and according to the instruction of wireless base station, control is also adjusted the burst signal of our station emission, launch time of pulse train 61 shown in Figure 3 for example.In addition, according to time set in the frame, be set in which time slot emission electric wave, again by the time difference T7 among time measurement functional measurement Fig. 3.
From CH post a letter/signal of multiplexed 79 of TDMA output is fed to extended coding operational part 80, extended coding operational part 80 uses the extended code of distributing to our station, on frequency axis above-mentioned signal is launched.The extended code of using in this extended coding operational part 80 is taken place by extended code generator sheet rate generator 82 and supplies with.Posted a letter after portion 74 amplifies by RF by the signal of this extended coding operational part 80 expansions, distribute, send from antenna 71 by transceiver dispenser 72.
After handling like this, in pulse train control/frame, measure the time location of the pulse train 52 of the delay ripple that arrives mobile radio station 32 from the wireless base station after 1 emission shown in Figure 3 in the time set time measurement portion 81.In addition according to the indication of time set time measurement portion 81 in the pulse train control/frame, taken place from the pulse train 61 of the electric wave of mobile radio station 32 emissions by extended code generator sheet rate generator 82, this pulse train 61 arrives wireless base station 1 at the beginning time location of time slot shown in Figure 3.
Fig. 5 is the block diagram of the structure of expression TDMA/ Time Division-Code Division Multiple Access wireless base station.Among the figure, the 91, the 92nd, with from mobile radio station shown in Figure 4 with antenna 71, transceiver dispenser 72, RF receiving part 73 and the RF function identical signal processing part of portion 74 after removing of posting a letter.Just, in this wireless base system, input and output voice signal not only, and have the function of the control information etc. of all systems of transmitting-receiving, the degree that the handling part of these control signals is different according to software also can be according to realizing with these signal processing part 91,92 identical functions.
93, the 94th, to from the adder of carrying out add operation based on the output signal of each signal processing part of signal processing part 91,92.The 95th, signal allocation addition portion, it is formed by these adders 93,94 and wired-OR, is used for to being input to the collection of letters signal in signal processing part 91,92 etc. and distributing and add operation from the letter signal of outputs such as signal processing part 91,92.The 96th, as the RF of portion of the posting a letter portion that posts a letter, the 97th, as the RF receiving part of receiving part, the 98th, transceiver dispenser, the 99th, antenna.In addition, portion 96, RF receiving part 97, transceiver dispenser 98, antenna 99 are very different even these RF post a letter, but then identical with these parts in the mobile radio station shown in Figure 4 as function.
In addition, in signal processing part 91,92,101, the 111st, error correction/acoustic coding portion, 102, the 112nd, CH posts a letter/the multiplexed portion of TDMA, 103, the 113rd, the extended coding operational part, 104, the 114th, time set time measurement portion in the pulse train control/frame, 105, the 115th, the extended code generator, 106, the 116th, the relevant collection of letters/anti-extended coding operational part, 107, the 117th, the CH collection of letters/TDMA demodulation section, 108, the 118th, error correction/sound decoding part, they are parts identical with counterpart shown in Figure 4.In addition, in this signal processing part 91,92, as the above-mentioned error correction/acoustic coding portion 101,111 of analog-to-digital conversion portion and as the above-mentioned error correction/sound decoding part 108,118 of digitaltoanalogconversion portion not only and between the man machine interface portion, and and analog network interface portion (omitting among the figure) between carry out transmitting-receiving as the information signal of voice signal.
Secondly, the working condition of the mobile radio station that constitutes like this is described.
Here, the work of corresponding part is identical in the groundwork of signal processing part 91,92 and the mobile radio station, time set time measurement portion 104,114 monitors and time measurement in the pulse train control/frame, so that become the beginning of collection of letters time slot from the beginning time location of the electric wave of mobile radio station, notify mobile radio station with measurement result, mobile radio station is controlled the beginning time location of the electric wave of emission according to this information.
For this reason, adder 93 and 94, be carried out add operation, be supplied to the RF portion 96 that posts a letter then with signal from other signal processing parts outputs from the signals of the extended coding operational part 103 of signal processing part 91,92 or 113 outputs.Just, under the situation of TDMA, different from the centre frequency of the intermediate frequency of the signal of signal processing part 91,92 outputs.Even this is because also can be avoided the cause of signal conflict in the identical situation of time slot.In addition, under the situation of Time Division-Code Division Multiple Access, if the extended code difference, even same time slot, also might be with two Signal Separation, so, also allow from the identical situation of centre frequency of the intermediate frequency of the signal of signal processing part 91,92 outputs.
Posted a letter after portion 95 amplifies by RF by adder 93,94 added signal,, send from antenna 99 via transceiver distributor 98.In addition, the signal that is received by antenna 99 is fed to RF receiving part 97 via transceiver distributor 98, after here being exaggerated, is imported in the relevant collection of letters/anti-extended coding operational part 106,116 etc. of signal processing part 91,92.
After handling like this, the wireless base station can use a plurality of signal processing parts such as signal processing part 91,92, measures the distance between a plurality of mobile radio stations.In addition, the information of communicating by letter between the mobile radio station from network one side, promptly deliver to synergic system 8 one sides from mobile exchange station shown in Figure 16,7, will be unified the information that side joint receives from network system and given mobile radio station from antenna 99.
In addition, in the above description, provided such example, the i.e. transformation component that input and output are used as information signal, use is as the above-mentioned error correction/acoustic coding portion 101 of analog-to-digital conversion portion, 111, and as the above-mentioned error correction/sound decoding part 108 of digitaltoanalogconversion portion, 118, and carry out example between the analog network interface portion as the transmitting-receiving of the information signal of voice signal, but also can use other forms of part as the transformation component that the input/output information signal is used, and carry out the transmitting-receiving of other signals between the analog network interface portion, in addition, also these transformation components can be mixed use.
In addition, Fig. 6 is the block diagram of one of the pulse train timing set-up function of expression in mobile radio station example.Among the figure, the 121st, the control information processor is used for the control information from the wireless base station is deciphered, and according to the information after the decoding the various functions of distance etc. is for example measured in the indication of this mobile radio station, gives the wireless base station with this response pass simultaneously.In addition, in Fig. 4, omitted this control information processor 121.
The 122nd, correlator, the spread coded signals that is used for sending here from the wireless base station multiply by identical extended code, takes out the signal after this extended code removed then, and the 123rd, the simulator of usefulness is removed in the interference from the multiplexing circuit of the electric wave of wireless base station.The relevant collection of letters/anti-extended coding operational part 75 is made of these correlators 122 and simulator 123.
The 124th, multiplexing separated part, be used for from a plurality of time slots, selecting to distribute to the time slot of our station, this is distributed to the information signal and the control information that comprise in the time slot of our station separates, the 125th, the information signal memory of the information signal that temporary transient storage is separated, the 126th, the control information memory of the control information that temporary transient storage is separated.The CH collection of letters/TDMA demodulation section 76 is made of these multiplexing separated part 124, information signal memory 125 and control information memory 126.
The 127th, the information signal memory of wireless base station information signal is given in temporary transient storage, the 128th, temporarily store the control information memory of control information, the 129th, multiplexing synthetic portion is used for this information signal and control information are synthesized, and carries out multiplexed to it in distributing to the time slot of our station.CH posts a letter/and multiplexed 79 of TDMA be made of these information signal memories 127, control information memory 128 and multiplexing synthetic portion 129.
Secondly, the working condition of the mobile radio station that constitutes like this is described.
Send to such an extent that information is transfused to the relevant collection of letters/anti-extended coding operational part 75 from the wireless base station, be correlated with in its correlator 122 collection of letters, anti-extended coding are removed interference in simulator 123.Give the CH collection of letters/TDMA demodulation section 76 then, the information signal and the control information that comprise in the time slot with our station in multiplexing separated part 124 are separated, and deposit information signal in information signal memory 125, deposit control information in control information memory 126.Control information stored is deciphered in 121 pairs of these control information memories 126 of control information processor, gives time set time measurement portion 81 in the pulse train control/frame with this decode results.
On the other hand, post a letter at CH/multiplexed 79 of TDMA in, multiplexing synthesizing carried out in the information signal of giving the wireless base station and control information by storage in 129 pairs of information signal memories 127 of multiplexing synthetic portion and the control information memory 128, gives extended coding operational part 80 with it.After the decode results that time set time measurement portion 81 has received from control information processor 121 in pulse train control/frame, extended coding generator sheet rate generator 82 is according to the signal from time set time measurement portion 81 in the pulse train control/frame, controls the beginning time location of electric wave transmitted in bursts time that has been carried out the information of extended coding by extended coding operational part 80 in time movably forward and backward.
As mentioned above, if adopt this embodiment 1, then owing to measure the time difference of the beginning time location of the beginning time location of pulse train of the electric wave that mobile radio station receives from the wireless base station and the electric wave pulse train that sends by mobile radio station for the beginning at time slot arrives the wireless base station with the sheet speed unit of Time Division-Code Division Multiple Access, so have the effect that to measure the distance of wireless base station and mobile radio station exactly.
Secondly, as embodiments of the invention 2, illustrate in the time-division CDMA system with work in the Determination of distance of mobile radio station.
Fig. 7 is the key diagram to one of the frame structure of the TDMA/ Time Division-Code Division Multiple Access communication system of PCS example of this embodiment 2 of expression.The no code system of implementing in Japan), but the structure of time slot some difference a little this frame structure is similar to PHS (Personal HandyPhone System:.That is, suppose that the acoustic coding decoding speed is 16kb/s, 8kb/s or 4kb/s.Message transmission rate is 192kb/s, and the information rate of each time slot is 23.2kb/s.Because establishing sheet speed is 192kb/s * 128=24.576Mb/s,, the data of above-mentioned 192kb/s are launched so utilize orthogonal spreading code with this sheet speed.Therefore, a plurality of Time Division-Code Division Multiple Access signal common channels of different orthogonal spreading codes are arranged in a time slot, and in the communicating by letter of wireless base station and a plurality of mobile radio stations, use this signal.
In this system, adopting the TDMA mode, obtaining under the situation of frame synchronization, because it is synchronous to press symbolic unit, so synchronization accuracy depends on the time of a symbol.At this moment, the length of a symbol is 1,/96 thousand symbols/s=10.41 μ s, and the speed of establishing electric wave is 300m/1 μ s, and the distance suitable with symbol time surpasses 3km, so promptly use the position of this accuracy representing mobile radio station and impracticable.On the other hand, if modulation system adopts the such CDMA mode of QPSK, then sheet speed is 24.567Mb/s, and character rate is 12.283 million symbols/s, and the length of this symbol is 0.0814 μ s, and its distance is 24.4m.Therefore, in this CDMA mode, be practical if measure distance with sheet speed unit.
In addition, (the Personal DigitalCellular Terecom System: a kind of mode of honeycomb) one of frame structure of having changed of mode CDMA example with the PDC of Japan has been shown among Fig. 8.Sheet speed is 10.752Mb/s, and character rate is 5.376 million symbols/s, and the length of this symbol is 0.186 μ s, and its distance is 55.8m.Because PDC is a cellular system, so if consider running car, then positional precision is 56m, can think in practicality it is no problem.
Secondly, the position measurement method of the sheet speed unit in this CDMA mode is described.Fig. 9 is the flow chart of the processing procedure of the pulse train beginning timing control in the expression mobile radio station, implements with Fig. 4, Fig. 5 in the foregoing description 1 and device shown in Figure 6.
In the wireless base station with post a letter by the control channel of TDMA mode in, also post a letter by control channel, but the mobile radio station of not obtaining frame synchronization is as yet carried out the beginning formality with the control channel connected system of TDMA mode at first in the CDMA mode.Therefore, under the situation of initial adding system, at first in the step ST1 of first processing procedure, mobile radio station receives the TDMA control channel that sends from the base station, according to this information, use the TDMA control channel of appointment, give the wireless base station with control information, via these both sides' control channel, and carry out communicating by letter of required control information between the wireless base station.
That is, in this step ST1, mobile radio station receives the TDMA control channel of object wireless base station, sends the beginning value of this frame simultaneously by uplink (Up-Link) TDMA control channel.Receive that the wireless base station of this value measures the frame beginning time location of this uplink signal received, send the indication before and after it to mobile radio station with TDMA transmitting time unit.If the same EOS of TDMA, just mobile radio station sends this value to wireless base station with the time difference of the beginning time location of information symbol number measurement transceiver pulse train.
After this, in step ST2, judge the talk channel of transferring to the Time Division-Code Division Multiple Access mode, still transfer to the talk channel of TDMA mode.Transfer to which talk channel on earth, this will be by the judgment processing such as state of the unit information amount of the function of mobile radio station and present position.
Under the situation of having concluded the talk channel of transferring to the Time Division-Code Division Multiple Access mode, in step ST3, this mobile radio station uses between Time Division-Code Division Multiple Access control channel and the wireless base station and carries out communicating by letter of control information.In the communication of this Time Division-Code Division Multiple Access control channel, in the time of with the communicating by letter of control information, carry out time slot position control with sheet speed unit.In addition, shown in Figure 3 as embodiment 1, this is equivalent to the sheet Measuring Time difference T7 of speed unit.
That is, in step ST3, mobile radio station receives the Time Division-Code Division Multiple Access control channel of object wireless base station, according to the beginning value of this frame, sends uplink Time Division-Code Division Multiple Access control channel.Receive that its wireless base station measures the frame beginning time location of the uplink signal received, transmit its front and back indication with sheet speed unit, the control Time Division-Code Division Multiple Access is to the transmitting time of mobile radio station, if the frame synchronization of Time Division-Code Division Multiple Access finishes, mobile radio station is just measured the time difference of the beginning time location of Time Division-Code Division Multiple Access transceiver pulse train with sheet speed unit, send this value to wireless base station.
After this, if transfer to the Time Division-Code Division Multiple Access talk channel of appointment, then in step ST4, begin conversation with this Time Division-Code Division Multiple Access talk channel as the 3rd processing procedure.In addition, in the case, the wireless base station is the pulse train of the Time Division-Code Division Multiple Access of the uplink in the received communication process continuously, and each frame is measured distance between mobile radio station and the wireless base station continuously, to the information of the transmitting site of mobile radio station marker pulse string.
This is measured under the situation of pcs system shown in Figure 7, and the symbol lengths of Time Division-Code Division Multiple Access signal patch speed is 0.0814 μ s, and the people passes by on foot, and this needs about 10 seconds apart from 24.4m.Therefore, adjusting transmitted in bursts during the time with sheet speed unit, carried out once in best about 10 seconds, mobile radio station and wireless base station are used for controlling the shared ratio of this adjustment in the processing time all very little.Therefore, the range determination of carrying out with this sheet speed unit can not become excessive burden in the processing of processor.
In addition, under the situation of cellular system shown in Figure 8, the symbol lengths of Time Division-Code Division Multiple Access signal patch speed is 0.816 μ s, and automobile needs about 2 seconds with the distance that the speed of 100km/h crosses this 55.8m.Therefore, adjusting transmitted in bursts during the time with sheet speed unit, carry out once best 2 seconds, and mobile radio station and wireless base station are used for controlling the shared ratio of this adjustment in the processing time all very little.Therefore, the range determination of carrying out with sheet speed unit in the case can not become excessive burden yet in the processing of processor.
On the other hand, in step ST2, under the situation of having concluded the talk channel of transferring to the TDMA mode, in step ST5, begin conversation with the TDMA talk channel of appointment as second processing procedure.In addition, in order in the communication process of TDMA mode, to measure the distance between mobile radio station and the wireless base station, have under the situation of sheet rate generator (Fig. 4 among the embodiment 1 and extended code generator sheet rate generator 82,105,115 shown in Figure 5) at mobile radio station and inside, wireless base station, with the sheet speed unit of Time Division-Code Division Multiple Access, adjust and the emission of the uplink signal pulse train that control is carried out to the wireless base station from mobile radio station.That is, mean the time T 7 with sheet speed unit measurement mobile radio station inside shown in Figure 3 among the embodiment 1,, send this information to wireless base station via the control information in the TDMA talk channel.This mobile radio station and wireless base station for the shared mode of TDMA/ Time Division-Code Division Multiple Access is easily.
If begin conversation with Time Division-Code Division Multiple Access talk channel or TDMA talk channel, then in step ST6, mobile radio station with said method measure with conversation now in a plurality of wireless base stations in addition, wireless base station between distance, send it in the conversation wireless base station.In step ST7, the information of the distance of this mobile radio station and each wireless base station is used in the mobile exchange station (MSC) judgement along with the mobile conversion of carrying out of mobile radio station from the collection of letters electric field strength of this mobile radio station and from the information of the collection of letters electric field strength of electric wave in mobile radio station of each wireless base station in each wireless base station.In addition, will describe this processing procedure in another embodiment in detail.
As mentioned above, if adopt this embodiment 2, then owing at first carry out communicating by letter of required control information with between the TDMA control channel of appointment and the wireless base station, after this, Time Division-Code Division Multiple Access talk channel or TDMA talk channel with appointment are conversed, so add at first at mobile radio station under the situation of this system, about frame information from the wireless base station, at first use the TDMA control channel, with the synchronously easy TDMA character rate of obtaining in time roughly, establish frame synchronization, after this, can establish synchronously with the sheet speed of the Time Division-Code Division Multiple Access that precision is higher in time.
Secondly, as embodiments of the invention 3, illustrate unequal interval mobile radio station conversion regime under the condition of wireless base station is set.
Mobile radio station is switched to the conversion of nearest wireless base station, in general is to carry out according to the electric field strength from the collection of letters signal of mobile radio station or wireless base station.
; mix under the situation about being provided with in different users' wireless base station; as situation about overlapping mutually or because traffic load the former thereby situation etc. of a plurality of wireless base stations is set in narrow scope in these unit (area of radio coverage); in the not necessarily equally spaced mobile communication system of distance between the wireless base station, exist and to judge the nearest situation from mobile radio station to adjacent wireless base station when the power of posting a letter of giving mobile radio station or wireless base station is maximum.
For example, communicate by letter with wireless base station 2 on one side at mobile radio station shown in Figure 1 32, on one side southeastward under the mobile situation of direction (top among Fig. 1 being decided to be north here), the power of posting a letter that wireless base station 2 sends to mobile radio station 32 also is not maximum, and mobile radio station 32 is approaching with adjacent wireless base station 1 gradually.Under extreme case, when mobile radio station 32 was come near the wireless base station 1, mobile radio station 32 still can keep communication loops with wireless base station 2.Therefore, so only determining conversion with the power of posting a letter, might be inadequate.
Figure 10 is provided with under the condition of wireless base station with being illustrated in such unequal interval, the block diagram of the structure of the mobile exchange station of this embodiment 3 of control mobile radio station conversion.In addition, the mobile exchange station 6 in this Figure 10 presentation graphs 1, but wireless base station 1 and 3 is connected with this mobile exchange station, and wireless base station 2 is connected with another switching station 7.1 is wireless base station (BS1) among the figure, the 3rd, and wireless base station (BS3), the 6th, mobile exchange station (MCS01), the 8th, synergic system (PSTN).In addition, the part that indicates same-sign among these and Fig. 1 is with a part.
In addition, in mobile exchange station 6, the 131st, the PSTN interface is used for carrying out the transmitting-receiving of information with the synergic system 8 of this mobile exchange station 6, communicates the transmitting-receiving of signal (dialing signal, cost information, encrypted message etc.) simultaneously.The 132nd, talk line exchange portion, the information (acoustic information/data message etc.) that is used for sending here from synergic system 8 sends the wireless base station 1 or 3 of existence to method, mobile station to, and in addition, the information that will send from the mobile station via wireless base station is issued synergic system 8.The 133rd, mode is set processor, the mode that is used for from the wireless mode of the wireless base station that connects TDMA mode or Time Division-Code Division Multiple Access mode and mobile radio station, selecting connection side's mobile radio station to communicate by letter, and indication is set in this mode in wireless base station and the mobile radio station.The 134th, communication processor is used for handling the numbering of the mobile radio station that should connect or collects encryption formality (whether the mobile radio station of confirming the connection side uses this password wrongly) that cost of the phone call uses etc. to connection side's mobile radio station.The 135th, base-station interface is used for carrying out communicating by letter of following information with the wireless base station: via the wireless base station give mobile radio station information (acoustic information/data message etc.), with the mode information of the wireless connections of the communication information of mobile radio station and regulation wireless base station and mobile radio station.
In addition, the mode of this mobile exchange station 6 is set processor 133 inside and is had memory (having omitted among the figure), is storing the range information of mobile radio station and the wireless base station around it in this memory.Figure 11 is the key diagram of one of the range information stored in this memory of expression example, and the mode that has provided mobile exchange station 6 is here set one of the mobile radio station 32 (MS 32) in the processor 133 and the range information of wireless base station on every side example.As shown in figure 11, the mode of this mobile exchange station 6 is set the range information of not only storing wireless base station 1 (BS1) and wireless base station 3 (BS3) in the processor 133, but also is storing the range information of wireless base station 2 (BS2).That is, mobile exchange station 6 (MSC01) is also obtained the information that this mobile exchange station 7 (MSC02) begins to measure from another user's mobile exchange station 7.
Though show the distance of mobile radio station 32 and each wireless base station 1,2,3 among Figure 11, but setting under the situation of talk channel when southeastward direction moves, arrives position shown in Figure 11 and between wireless base station 2 (BS2) at mobile radio station shown in Figure 1 32 (MS32), even arrive this position, still be connected with the wireless base station, wireless base station 2 itself is not affected yet.Concerning wireless base station 1 (BS1), become near the wireless base station and post a letter with high-power.Under the situation of CDMA mode, such state becomes one of reason that makes the system performance degradation relevant with wireless base station 1, so be necessary to avoid to carry out high-power state of posting a letter near the wireless base station.
Secondly, illustrate that near the mobile radio station the wireless base station of avoiding such carries out high-power processing procedure of posting a letter.
Here, Figure 12 is mobile radio station and the flow chart of representing in this case that begins of the range determination between the adjacent wireless base station and control transformation.In addition, the process software of realizing this processing procedure has in the mode of mobile exchange station shown in Figure 10 6 is set processor 133.
At first, in step ST11, the distance between the object wireless base station of mensuration mobile radio station and set conversation channel is given the object wireless base station with this measurement result.Distance between this mobile radio station and each wireless base station can obtain like this: in the explanation of embodiment 2,1/2 of the time difference that will measure in step ST1 shown in Figure 9, step ST4 or step ST5 multiply by the speed of light and tries to achieve.
For example, be that example illustrates with mobile radio station shown in Figure 1 32, the distance of the wireless base station 1 in measurement of mobile radio station 32 usefulness said methods and the conversation is given wireless base station 1 with the range information that obtains.Distance between other adjacent wireless base stations 2 that mobile radio station 32 also uses the same method and do not converse is given wireless base station 1 with this range information.Measure the distance that to set other wireless base stations of channel with wireless base station 3 grades again, send range information to wireless base station 1.
Secondly, in step ST12, mobile exchange station 6 is the above-mentioned range information of 1 collection from the wireless base station, monitor the existence of other adjacent wireless base stations nearer than the distance of the wireless base station of communicating by letter till now, there is not nearer station if in step ST13, conclude, just get back to step ST11 and handle, carry out above-mentioned processing repeatedly.In addition, if conclude that in step ST13 nearer station is arranged, then in step ST14, mobile exchange station 6 begins to carry out the formality that the correspondent of mobile radio station is transformed into its nearest wireless base station.
Here, mobile radio station 32 shown in Figure 1 is conversed with wireless base station 1, wireless base station 1 and mobile radio station 32 all have required collection of letters signal strength signal intensity, and under the situation of the error rate of the between communication information less than specified standard, from standard (Criteria) in the past, this mobile radio station 32 does not need to change., in fact as shown in Figure 1, mobile radio station 32 is nearer than arriving wireless base station 1 to the distance of wireless base station 2 sometimes.Like this, under the situation that the wireless base station nearer to mobile radio station arranged, begin to carry out the formality that the communication party of mobile radio station 3 is updated to the conversion of this nearer wireless base station (in illustrated example, being wireless base station 2).
Secondly, enter step ST15, finished the conversion formality after, mobile radio station continues to measure the distance with on every side wireless base station, gives mobile exchange station with the range information of its acquisition by the new wireless base station of conversion.
In addition, in the above-mentioned again explanation, the wireless base station that has provided transfer party is the situation of all wireless base stations of same user, but the user who has a wireless base station of transfer party also can be with have conversation in the different user of user of wireless base station.Promptly, under the situation that to the nearest wireless base station of this mobile radio station is the different wireless base station that the user had, mobile exchange station with the conversion sign on via synergic system 8 and this different mobile exchange station that the user had, send this nearest wireless base station to.Therefore, use the identical processing procedure of conversion of the wireless base station that is had with same user, can carry out conversion with the different wireless base stations that the user had.
As mentioned above, if adopt this embodiment 3, then because according to the result of Determination of distance accurately between mobile radio station and the wireless base station, send the sign on of conversion, so in the zone that the unit of different users' wireless base station overlaps mutually, or because traffic load etc. former thereby in narrow scope, be provided with in the zone of a plurality of wireless base stations, compare with the situation of the decision of only changing according to the judgement of collection of letters signal strength signal intensity etc., can be transformed into the wireless base station nearer apart from this mobile radio station more reliably, mobile radio station and wireless base station both sides can both avoid launching unnecessary strong electric wave.
Embodiment 4
Secondly, as embodiments of the invention 4, the frame synchronization control channel mode between the wireless base station under the TDD situation is described.
In embodiment 1, illustrated and measured the time difference of mobile radio station from the beginning time location of the beginning time location of the burst signal of wireless base station reception and the burst signal that mobile radio station sends to the wireless base station, but in this embodiment 4, it is the time difference of the beginning time location of the beginning time location of the burst signal when in slave base stations, measuring a wireless base station (to call slave base stations in the following text) and having received the pulse train electric wave that another wireless base station (to call the trunk base station in the following text) sends and the burst signal that slave base stations sends to the trunk base station.
Figure 13 is the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel of using of the frame synchronization between the wireless base station of a plurality of different user in expression TDMA/ Time Division-Code Division Multiple Access coexistence TDD system example.
In this Figure 13, as control channel, under the situation of TDMA, use pulse train 204, under the situation of Time Division-Code Division Multiple Access, use pulse train #201-0.These two pulse trains all are to distribute to the time slot T that posts a letter
0The electric wave of (for example the wireless base station 1) emission from the trunk base station of-1 is equivalent to the pulse train 51 among Fig. 3.The slave base stations (for example the wireless base station 2) that has received this pulse train sent the pulse train electric wave as pulse train shown in Figure 3 61 before the beginning time location of time slot.
In addition, the control channel that slave base stations 2 sends to trunk base station 1 is pulse train 209 under the situation of TDMA, is pulse train #203-0 under the situation of Time Division-Code Division Multiple Access.These pulse trains all are assigned to the time slot T that posts a letter
0-2.
In addition, in this Figure 13, time slot T posts a letter
0-1 the beginning time location and the time slot T that posts a letter
0-2 at the first bruss between offset 10ms (regular time is poor).That is, since this Figure 13 with the longitudinal axis as time shaft, so the time slot T that posts a letter
0-1 lower side is the beginning time location of the pulse train #201-0 of the pulse train 204 of TDMA of 1 emission from the trunk base station or Time Division-Code Division Multiple Access, and time slot T posts a letter
0-2 lower side is the beginning time location from the pulse train #203-0 of the pulse train 209 of the TDMA of slave base stations 2 emissions or Time Division-Code Division Multiple Access.Like this, both at the first bruss between offset regular time difference 10ms, but in Fig. 3 as the beginning time location of time slot, remove beyond this difference regular time, represent both with same time location.
Secondly, the same structural approach as the control channel of keeping the frame synchronization mode between the wireless base station under the PCS situation of having of TDD structure of time slot shown in Figure 13 with Fig. 7 etc. is described.
Here, Figure 14 is one of (RX) distribution routine key diagram of posting a letter (TX) and collect mail of representing the wireless base station time slot of TDMA control channel/Time Division-Code Division Multiple Access control channel shown in Figure 13 with the form of table.In above-mentioned Figure 13 and this Figure 14, be fed to the time slot T that posts a letter of trunk base station 1 at TDMA control channel 204 and time-division CDMA control channel #201-0
0Situation under, slave base stations 2 must be at the time slot T that posts a letter itself
0Middle this control channel signals that receives.Therefore, in this slave base stations 2 at the time slot T that posts a letter
0Under the situation of middle reception control channel, slave base stations 2 can not be posted a letter at this time slot.
That is, slave base stations 2 receives the TDMA control signal at tdma slot 204, receives the Time Division-Code Division Multiple Access control signal at Time Division-Code Division Multiple Access time slot #201-0, sends the TDMA control signal at tdma slot 209, sends the Time Division-Code Division Multiple Access control signal at Time Division-Code Division Multiple Access time slot #203-0.
Here, if the Time Division-Code Division Multiple Access control information signal bursts from slave base stations is received in the trunk base station, just carry out the identification whether this collection of letters burst signal is positioned at suitable burst location.Its identification as a result is positioned at suitable burst location, just sends this qualified information to slave base stations by control channel.If slave base stations is received the qualified information from this trunk base station, just generate such time difference information, promptly the time difference of the beginning time location of the beginning time location of the Time Division-Code Division Multiple Access control signal pulse train that sends from the trunk base station and the Time Division-Code Division Multiple Access control signal pulse train that slave base stations sends to the trunk base station is removed the time difference information after regular time differs from, and sends this information to the trunk base station.
Promptly, (this pulse train 62 is from mobile radio station 32 emissions in Fig. 3 for the beginning time location of the pulse train 62 that the detection of trunk base station is shown in Figure 3, but here, changed this mobile radio station into slave base stations) whether consistent, this is consistent detect information and sent to slave base stations from the trunk base station after, initial slave base stations will send the trunk base station to from the time difference information that the time difference of the beginning time location of the beginning time location of collection of letters burst signal and the burst signal of posting a letter removed after regular time poor (10ms shown in Figure 13).
On the other hand, when the Time Division-Code Division Multiple Access control information signal bursts that sends from slave base stations arrives the trunk base station, assert that by the trunk base station burst signal of being received has departed under the situation of suitable burst location, promptly pulse train shown in Figure 3 62 at the first bruss between position deviation under the situation of beginning time location of time slot, its shift time is measured by sheet speed unit with the Time Division-Code Division Multiple Access mode in the trunk base station, sends the information that is obtained to slave base stations by control channel.Slave base stations is according to this offset information of receiving from this trunk base station, according to the beginning time location of standard correction from the Time Division-Code Division Multiple Access control signal burst signal of trunk base station transmission, time after its skew is corrected, emission will send to the beginning time location of the Time Division-Code Division Multiple Access control signal burst signal of trunk base station and give the burst signal of trunk base station.
In addition, in the frame synchronization between such wireless base station, cause the reason of simultaneous bias to be: the frequency stability of the sender unit in the assumed wireless base station is 1 * 10
-6, because the character rate of the system among Fig. 7 was 12.283 million symbol/seconds, so be offset about 13 symbols symbol of every 1/13=0.769=76.9 millisecond change 1 second.Here, the length of frame is 10 milliseconds, so per 7 frames just need be revised once the time that is equivalent to a boot symbol (チ Star プ シ Application ボ Le) part.
To the correction operation that above sheet rate shift is carried out, per two frames carry out once just enough.In the structure of Figure 13 and control channel shown in Figure 14, the synchronous correction mobile station location that per two frames carry out between the wireless base station of a Time Division-Code Division Multiple Access control channel is measured, per in addition two frames send a TDMA control channel, are used for the initial seizure of synchronizing information control information.
Here, in the above-described embodiments, the simultaneous bias of the sheet speed that mobile radio station that automobile in travelling or the people in the walking carry causes has been described, but compare with the correction of carrying out with this skew, the correction of being undertaken by the skew of inner sender unit, its frequency is much higher, so the correction of simultaneous bias can only will be that the correction of foundation is as object with the skew of this sender unit.
In addition, Time Division-Code Division Multiple Access pulse train #201-0 shown in Figure 13 is the time slot of posting a letter in the TDD mode, so slave base stations was exactly the station that sends the Time Division-Code Division Multiple Access burst signal here originally., in order to receive the Time Division-Code Division Multiple Access burst signal that the trunk base station sends, and the transmission of this Time Division-Code Division Multiple Access pulse train #201-0 is interrupted.In the Time Division-Code Division Multiple Access time slot, can set the many talk channels of sign indicating number after multiplexed, can carry out many communications (posting a letter in the case) simultaneously, but the frame synchronization between the establishment wireless base station, on time frame shown in Figure 13, the system that utilizes the time-division to communicate is extremely important.Therefore, temporarily abandon the setting of a plurality of talk channels, be used to receive a control channel from the trunk base station.
As mentioned above, if adopt this embodiment 4, then, slave base stations removes time difference after regular time differs from because measuring from the time difference of the beginning time location of the beginning time location of collection of letters burst signal and the burst signal of posting a letter with sheet speed unit, and send this time difference information to the trunk base station, so in the TDD mobile communication system of TDMA mode and time-division CDMA mode, can establish the frame synchronization between the wireless base station, avoid the interference between the time slot.
Embodiment 5
In addition, in the foregoing description 4, the frame synchronization control channel mode between the wireless base station under the TDD situation has been described, but following as embodiments of the invention 5, with the frame synchronization control channel mode between the wireless base station under the explanation FDD situation.
Figure 15 is the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel of using of the frame synchronization between the wireless base station of a plurality of different user in expression TDMA/ Time Division-Code Division Multiple Access coexistence FDD system example.In addition, time slot T/R in this Figure 15
0-1 beginning time location and time slot T/R
0-2 at the first bruss between offset 10ms.
Secondly, illustrate the same with Fig. 8, as the constructive method of the control channel of the mode of keeping the frame synchronization between the wireless base station under the cellular system situation of having of FDD structure of time slot shown in Figure 15 etc.In addition, Figure 16 represents that with the form of table the transceiver (TX/RX) of the wireless base station time slot of TDMA control channel/Time Division-Code Division Multiple Access control channel shown in Figure 15 one of distributes the key diagram of example.
In above-mentioned Figure 15 and Figure 16, be fed to the transceiver time slot T/R of trunk base station 1 at TDMA control channel 214 and time-division CDMA control channel #211-0
0Under-1 the situation, slave base stations must be at the transceiver time slot T/R of itself
0Middle this control channel signals that receives.Therefore, in this slave base stations at transceiver time slot T/R
0Under the situation of middle reception control channel, slave base stations can not be posted a letter at this time slot.
That is, slave base stations 2 receives the TDMA control signal at tdma slot 214, receives the Time Division-Code Division Multiple Access control signal at Time Division-Code Division Multiple Access time slot #211-0, sends the TDMA control signal at tdma slot 216, or sends the Time Division-Code Division Multiple Access control signal at Time Division-Code Division Multiple Access time slot #212-0.
In addition, is in the system shown in Figure 8 at the honeycomb time-division CDMA system with above-mentioned different another example shown in Figure 15, at character rate is that 5.376 million symbol/seconds, stability are under the situation of 1 * 10-6, because be offset about 5.4 symbols 1 second, so every 1/5.4=0.185=185 millisecond needs to revise a symbol.Because the length of frame is 20ms, again because of 185/20=9.2, so per 9 frames need be revised once.
To the correction operation that above sheet rate shift is carried out, per two frames carry out once just enough.In the structure of Figure 15 and control channel shown in Figure 16, the synchronous correction mobile station location that per two frames carry out between the wireless base station of a Time Division-Code Division Multiple Access control channel is measured, in the once remaining frame of per two frames, send the TDMA control channel in addition, be used for the initial seizure of synchronizing information control information.
That is, if adopt example shown in Figure 15, then trunk base station 1 is at the transceiver time slot T/R of frame beginning
0Send the pulse train 214 of TDMA control channel and the pulse train #211-0 of Time Division-Code Division Multiple Access control channel in-1., the transceiver time slot T/R that starts at next frame
0Do not send the pulse train of these TDMA control channels and the pulse train of time-division CDMA control channel in-2.Then, at the transceiver time slot T/R of the beginning of next frame again
0Send the pulse train 217 of TDMA control channel and the pulse train #213-0 of Time Division-Code Division Multiple Access control channel in-3.Below handle equally, alternately carry out the transmission of the pulse train of the pulse train of this TDMA control channel and time-division CDMA control channel/stop repeatedly every a frame.
In addition, at the transceiver time slot T/R of the frame beginning of the transmission of the pulse train of pulse train that does not carry out the TDMA control channel and time-division CDMA control channel
0In-2, the pulse train 216 of the TDMA control channel that trunk base station 1 reception slave base stations 2 is sent and the pulse train #212-0 of Time Division-Code Division Multiple Access control channel.
In order to catch the frame synchronization between the wireless base station, as mentioned above, in the time slot that original trunk base station transmits control channel, must receive the control signal of slave base stations in addition.Therefore, the special using method of this time slot be since at this moment the wireless base station play a part mobile radio station, therefore only link to each other with downgoing line, to from the uplink of mobile radio station transmission signal without any influence.
Here, the simultaneous bias of the sheet speed that mobile radio station that automobile in travelling or the people in the walking carry causes has been described in the foregoing description 2, but compare with the correction of carrying out with this skew, the correction of being undertaken by the skew of inner sender unit, its frequency is much higher, so identical with the situation of TDD, under the situation of this FDD, the correction of simultaneous bias also can only will be that the correction of foundation is as object with the skew of this sender unit.
As shown in figure 16, even under the situation of FDD, be used for the TDMA control channel of the frame synchronization between the wireless base station and the transmitting-receiving of time-division CDMA control channel and implement in downgoing line one side fully, and do not use uplink one side.Therefore, in the processing procedure of the frame synchronization between this wireless base station, can not hinder letter signal,, not need to limit posting a letter of mobile radio station particularly in order to reach this purpose from uplink one side of mobile radio station.
As mentioned above, if adopt this embodiment 5, then owing to after having assert that by the trunk base station collection of letters pulse train is positioned at suitable burst location, slave base stations sends the time difference information of the beginning time location of the burst signal of transmitting-receiving to the trunk base station, the trunk base station sends TDMA control signal pulse train and time-division CDMA control signal pulse train at the beginning time slot every a frame, so in the FDD mobile communication system of TDMA mode and time-division CDMA mode, can confirm the frame synchronization between the wireless base station, avoid the interference between the time slot.
Secondly, as embodiments of the invention 6, the trunk base station under TDD and the FDD situation and the establishment problem of the frame synchronization between a plurality of slave base stations are described.
Figure 17 is illustrated in the TDMA/ Time Division-Code Division Multiple Access coexistence TDD system, between a plurality of different users' wireless base station, and the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel when a trunk base station and a plurality of slave base stations are established frame synchronization example.In addition, Figure 18 represents that with the form of table the transceiver (TX/RX) of the wireless base station time slot of this TDMA shown in Figure 17 control channel/Time Division-Code Division Multiple Access control channel one of distributes the key diagram of example.
The processing procedure of a trunk base station and a plurality of slave base stations establishment frame synchronization at first, is described with this Figure 17 and Figure 18.
As Figure 17 and shown in Figure 180, be transmitted under the situation of slave base stations 2 (BS2) and slave base stations 3 (BS3), from trunk base station 1 (BS1) at the time slot T that posts a letter in synchronizing information
0In-1, trunk base station 1 usefulness TDMA control channel and time-division CDMA control channel send TDMA control signal pulse train and time-division CDMA control signal pulse train, and slave base stations 2 and 3 receives the TDMA control signal pulse train or the Time Division-Code Division Multiple Access control signal pulse train of this TDMA control channel or Time Division-Code Division Multiple Access control channel.At this moment, constitute the downgoing line of the control channel that frame synchronization is used between the wireless base station.
In addition, be transmitted to from slave base stations 2 and 3 under the situation of trunk base station 1, in synchronizing information at the time slot T that posts a letter
0In-2, slave base stations 2,3 usefulness TDMA control channels or Time Division-Code Division Multiple Access control channel send TDMA control signal pulse train or Time Division-Code Division Multiple Access control signal pulse train, and trunk base station 1 receives the TDMA control signal pulse train and the time-division CDMA control signal pulse train of this TDMA control channel and time-division CDMA control channel.At this moment, constitute the uplink of the control channel that frame synchronization is used between the wireless base station.
In addition, the basic processing process of the frame synchronization between the establishment wireless base station is identical with the situation of the foregoing description 4.
Secondly, the processing procedure of a trunk base station and a plurality of slave base stations establishment frame synchronization is described with Figure 19 and Figure 20.In addition, in the case, the basic processing process of establishing the frame synchronization between the wireless base station is identical with the situation of the foregoing description 5.
Here, Figure 19 is illustrated in the TDMA/ Time Division-Code Division Multiple Access coexistence FDD system, between a plurality of different users' wireless base station, the key diagram of one of TDMA control channel/Time Division-Code Division Multiple Access control channel when a trunk base station and a plurality of slave base stations are established frame synchronization example.In addition, Figure 20 represents that with the form of table the transceiver (TX/RX) of the wireless base station time slot of this TDMA shown in Figure 19 control channel/Time Division-Code Division Multiple Access control channel one of distributes the key diagram of example.
As Figure 19 and shown in Figure 20, be transmitted under the situation of slave base stations 2 (BS2) and slave base stations 3 (BS3), from trunk base station 1 (BS1) at transceiver time slot T/R in synchronizing information
0In-1, trunk base station 1 usefulness TDMA control channel and time-division CDMA control channel send TDMA control signal pulse train and time-division CDMA control signal pulse train, and slave base stations 2 and 3 receives the TDMA control signal pulse train or the Time Division-Code Division Multiple Access control signal pulse train of this TDMA control channel or Time Division-Code Division Multiple Access control channel.At this moment, constitute the downgoing line of the control channel that frame synchronization is used between the wireless base station.
In addition, be transmitted under the situation of trunk base station 1 from slave base stations 2,3, at transceiver time slot T/R in synchronizing information
0In-2, slave base stations 2,3 usefulness TDMA control channels or Time Division-Code Division Multiple Access control channel send TDMA control signal pulse train or Time Division-Code Division Multiple Access control signal pulse train, and trunk base station 1 receives the TDMA control signal pulse train and the time-division CDMA control signal pulse train of this TDMA control channel and time-division CDMA control channel.At this moment, constitute the uplink of the control channel that frame synchronization is used between the wireless base station.
As mentioned above, if adopt present embodiment 6, then because the trunk base station sends TDMA control signal pulse train and time-division CDMA control signal pulse train, send synchronizing information to a plurality of slave base stations from the trunk base station, each slave base stations sends TDMA control signal pulse train or Time Division-Code Division Multiple Access control signal pulse train, send synchronizing information to the trunk base station from each slave base stations, so can use the precision of Time Division-Code Division Multiple Access sheet speed unit, obtain the frame synchronization between a trunk base station and a plurality of slave base stations simultaneously, can avoid the interference between time slot that a plurality of wireless base stations cause.
Embodiment 7
Secondly, as embodiments of the invention 7, the processing procedure that the frame synchronization between trunk base station and the adjacent slave base stations is controlled be described.
Figure 21 is the flow chart of one of control and treatment process of the frame synchronization between expression trunk base station and the adjacent slave base stations example.With regard to a plurality of slave base stations, each slave base stations is carried out this control and treatment process repeatedly.
Promptly, in step ST21 shown in Figure 21, at first, slave base stations receives the TDMA control signal pulse train that the trunk base station sends with the TDMA control channel at first, beginning time location with this burst signal is a benchmark, with the TDMA control channel of uplink the TDMA control signal pulse train of this slave base stations is sent to the trunk base station.
In step ST22, received the TDMA control channel of the trunk base station of this TDMA control signal pulse train with the uplink of this trunk base station transmission, the burst location control signal of posting a letter that to control usefulness sends to slave base stations, so that can receive the TDMA control signal pulse train that above-mentioned slave base stations sends at certain time slot.
Secondly, in step ST23, the frame synchronization between the wireless base station that uses above-mentioned TDMA control channel is established after confirming that the TDMA control signal pulse train of the uplink that slave base stations sends according to the above-mentioned burst location control signal of posting a letter has arrived time slot position on receiver axle input time that is positioned at the trunk base station in the trunk base station.After the frame synchronization of TDMA control channel has been established in the trunk base station, Time Division-Code Division Multiple Access control signal pulse train is sent to this slave base stations.
If slave base stations is received this pulse train, then in step ST24, beginning time location with the Time Division-Code Division Multiple Access control signal pulse train received is a benchmark, with the Time Division-Code Division Multiple Access control channel of uplink, the Time Division-Code Division Multiple Access control signal of our station is sent to the trunk base station.Secondly in step ST25, the trunk base station is in order to control, utilize the Time Division-Code Division Multiple Access control channel of the downgoing line of this trunk base station transmission, the burst location of will posting a letter control signal sends to slave base stations, so that at the Time Division-Code Division Multiple Access control signal pulse train of certain time slot reception by above-mentioned slave base stations reception.Like this, the frame synchronization between the wireless base station of the sheet speed unit that uses Time Division-Code Division Multiple Access of establishment use Time Division-Code Division Multiple Access control channel.
If measuring, the frame synchronization of the sheet speed unit that uses Time Division-Code Division Multiple Access between trunk base station among this step ST23 and the ST24 and the slave base stations finishes, just this shift time information is deposited in the memory in slave base stations and mobile exchange station.Distance between this shift time information and trunk base station and the slave base stations is proportional, but because these wireless base stations are mobile, so be certain.Therefore, if slave base stations receives the Time Division-Code Division Multiple Access control signal pulse train from the trunk base station, owing to stored shift time information from the beginning time location of collection of letters pulse train, so according to the shift time information of storing in the memory, setting is from the beginning time location of the frame of this slave base stations of this reception.
At this moment, if the measurement of shift time is not in case end just needs to have sent the Time Division-Code Division Multiple Access control signal pulse train of uplink from slave base stations to the trunk base station, after this, slave base stations stops to send Time Division-Code Division Multiple Access control signal pulse train with uplink.Therefore, the trunk base station does not need to use the time slot of this Time Division-Code Division Multiple Access control signal when collecting mail, so use this time slot as common talk channel in downgoing line, can send Time Division-Code Division Multiple Access conversation signal pulse train.This processing procedure is shown among the step ST26 shown in Figure 21.
Above-mentioned trunk base station 1 (BS1) does not need to receive from the Time Division-Code Division Multiple Access control signal pulse train of slave base stations 2 (BS2) with the uplink transmission, as the time slot that common talk channel can use in uplink, for example is T shown in Figure 180
0" RX " of the Time Division-Code Division Multiple Access control channel of BS1 in capable is slot CDMA #203-0 in Figure 17 in-2 hurdles.In addition, be T/R in Figure 20
0" RX " of the Time Division-Code Division Multiple Access control channel in BS 1 row in-2 hurdles is slot CDMA #212-0 in Figure 19.
After this, in step ST27, do not needing time slot to use more, under the few more situation of call-information amount as talk channel with the Time Division-Code Division Multiple Access control signal of trunk base station, the trunk base station sends instruction to this slave base stations, so that dividing control signal pulse train when sending by uplink.For example, wait at dead of night under the situation because the call-information amount is few, so band of such time is and the wireless base station between carry out above-mentioned shift time information mensuration confirm corresponding environment.
As mentioned above, if adopt this embodiment 7, then since at first with TDMA control channel establishment, then established frame synchronization between the wireless base station with the Time Division-Code Division Multiple Access control channel after, the shift time of the beginning time location of the burst signal of slave base stations transmitting-receiving is stored in the memory of slave base stations or mobile exchange station, so can not upgrade between the trunk base station under the situation of control information, also can utilize the information of the beginning time location of Time Division-Code Division Multiple Access control channel and this shift time of measuring in advance of storing of reception, avoid the interference between the time slot.
Secondly control and treatment process when using the frame synchronization between TDMA control channel establishment trunk base station and the adjacent slave base stations, as embodiments of the invention 8, be described under the excessive situation of call-information amount.
Figure 22 is the flow chart that one of the trunk base station under the excessive situation of such call-information amount and the control and treatment process of the frame synchronization between adjacent slave base stations example has been considered in expression.In addition, Figure 23 and Figure 24 are the key diagrams of representing the allocation situation of control signal in this case with the form of table, Figure 23 represents the example that the transceiver (TX/RX) in the TDMA/ Time Division-Code Division Multiple Access coexistence TDD system is distributed, the example that the transceiver (TX/RX) in Figure 24 table TDMA/ Time Division-Code Division Multiple Access coexistence FDD system is distributed.
Below, the control and treatment process of the frame synchronization between trunk base station and the slave base stations is described according to Figure 22.
At first in step ST31, the same with the situation of embodiment 7, slave base stations receives the TDMA control signal pulse train that the trunk base station sends with the TDMA control channel at first, beginning time location with this burst signal is a benchmark, with the TDMA control channel of uplink the TDMA control signal pulse train of this slave base stations is sent to the trunk base station.
Secondly in step ST32, the trunk base station utilizes the TDMA control channel of the uplink of this trunk base station transmission, the burst location control signal of posting a letter of control usefulness is sent to slave base stations, so that receive the TDMA control signal pulse train that above-mentioned slave base stations sends at certain time slot, simultaneously according to this burst location control signal of posting a letter, adjust the launch time of the pulse train of posting a letter of slave base stations, the TDMA control signal pulse train of the uplink that the affirmation slave base stations sends has arrived the time slot position on receiver axle input time that is positioned at the trunk base station.Thereby establish the frame synchronization between the wireless base station that uses the TDMA control channel.
Secondly in step ST33, establish the frame synchronization between the wireless base station of this TDMA control channel, under the state that has carried out practical application, be before the state that can use at the time-division of slave base stations control channel, judge whether the call-information amount has changed.Its result if the time-division control channel is in out of use state, handles just get back to step ST32, directly uses the practical application of the frame synchronization between the wireless base station of TDMA control channel.
On the other hand, in step ST33, can use under the situation of time-division control channel having concluded, enter step ST34, this slave base stations is given with Time Division-Code Division Multiple Access control signal pulse train in the trunk base station.
Below, the same with the situation of embodiment 7, in step ST35, received that the slave base stations of above-mentioned Time Division-Code Division Multiple Access control signal pulse train gives the trunk base station with the Time Division-Code Division Multiple Access control signal pulse train of our station, in step ST36, the trunk base station burst location control signal of will posting a letter sends to slave base stations, establishes the frame synchronization of Time Division-Code Division Multiple Access control channel.After this, in step ST37, the shift time information that storage records stops the transmission of later Time Division-Code Division Multiple Access control signal pulse train, if the call-information amount descends, just indication sends the Time Division-Code Division Multiple Access control signal pulse train that is stopped.
Certainly, the Time Division-Code Division Multiple Access channel that the most handy synchronization accuracy is high is implemented the frame synchronization between the wireless base station, but the call-information amount in this moment object wireless base station is very high, can not use owing to receive the Time Division-Code Division Multiple Access control information of control channel under the situation of time slot of Time Division-Code Division Multiple Access, as mentioned above, as measure preferably, be that character rate unit with the TDMA control channel obtains frame synchronization, the moment that call-information amount in this wireless base station has descended, the time slot of Time Division-Code Division Multiple Access is distributed as control channel, be used to receive the Time Division-Code Division Multiple Access control information.
In addition, in Figure 23 and Figure 24, show and in a time slot, post a letter simultaneously (TX) and collect mail (RX), but for the shared time slot of transceiver, need the sharp-pointed wireless separation filter that both frequencies is carried out necessary separation, but do not discuss, so do not talk this problem here.
As mentioned above, if adopt this embodiment 8, if then owing to can not use the Time Division-Code Division Multiple Access control channel, just carry out the frame synchronization of TDMA control channel repeatedly, if can use, just carry out the frame synchronization of Time Division-Code Division Multiple Access control channel, even so can not use when between the wireless base station, carrying out the communication of control signal under the situation of time slot of Time Division-Code Division Multiple Access, also can use the frame synchronization between the TDMA control channel establishment wireless base station, so can use minimal system, can avoid the interference between the time slot.
The possibility of industrial utilization
As mentioned above, the Time Division-Code Division Multiple Access channel (shared channel) that GSM of the present invention has FDMA/TDD and TDMA/ digital communication and time slot share channel to share at frequency axis, use the FDMA/TDD mode of the modulation signal of digital modulation mode, multiplexing carrier frequency TDMA mode, or the Time Division-Code Division Multiple Access mode is carried out two-way communication and will be coupled together between movement station and the wireless base station, can measure movement station in such GSM and the distance between the wireless base station, can also establish frame synchronization, in addition, can also be used for the measurement of the distance between the wireless base station and the establishment of frame synchronization. In addition, be not only applicable to the GSM between wireless connections movement station and the wireless base station, but also be applicable to the GSM between wireless connections movement station and semifixed WLL station and the wireless base station.
Claims (10)
1. mobile communication system of carrying out two-way communication with the Time Division-Code Division Multiple Access mode between a plurality of mobile radio stations and at least one wireless base station is characterized in that:
Above-mentioned mobile radio station has:
The channel CH collection of letters/TDMA demodulation section receives the signal send here from the wireless base station, and the Time Division-Code Division Multiple Access signal is carried out demodulation, and takes out required signal from the form of the signal that obtained;
Channel CH posts a letter/the multiplexed portion of TDMA, and the Time Division-Code Division Multiple Access signal is carried out multiplexed and gives the wireless base station;
Time measurement portion, with receive in the above-mentioned channel CH collection of letters/TDMA demodulation section and demodulation after the beginning time location and the above-mentioned channel CH of Time Division-Code Division Multiple Access signal post a letter/give among multiplexed of the TDMA time difference after the set time difference of having removed between the beginning time location of Time Division-Code Division Multiple Access signal of this wireless base station, measure with the sheet speed unit that uses in the Time Division-Code Division Multiple Access communication; And
The sheet rate generator produces the sheet speed of using in the above-mentioned Time Division-Code Division Multiple Access communication, and with its service time measurement section.
2. mobile communication system of carrying out two-way communication with the Time Division-Code Division Multiple Access mode between a plurality of mobile radio stations and at least one wireless base station is characterized in that:
As the mobile communication system of above-mentioned mobile communication system employing with the shared mode of TDMA/ Time Division-Code Division Multiple Access in the time slot of the frame formation of the time slot insertion TDMA mode of above-mentioned Time Division-Code Division Multiple Access mode,
Above-mentioned mobile radio station has:
The channel CH collection of letters/TDMA demodulation section receives the signal send here from the wireless base station, and the Time Division-Code Division Multiple Access signal is carried out demodulation, and takes out required signal from the form of the signal that obtained;
Channel CH posts a letter/the multiplexed portion of TDMA, and the Time Division-Code Division Multiple Access signal is carried out multiplexed and gives the wireless base station;
Time measurement portion, with receive in the above-mentioned channel CH collection of letters/TDMA demodulation section and demodulation after the beginning time location and the above-mentioned channel CH of Time Division-Code Division Multiple Access signal post a letter/give among multiplexed of the TDMA time difference after the set time difference of having removed between the beginning time location of Time Division-Code Division Multiple Access signal of this wireless base station, measure with the sheet speed unit that uses in the Time Division-Code Division Multiple Access communication; And
The sheet rate generator produces the sheet speed of using in the above-mentioned Time Division-Code Division Multiple Access communication, and with its service time measurement section.
3. mobile communication system according to claim 2 is characterized in that:
Mobile radio station and a wireless base station carry out wireless connections,
In communication process, the beginning time location of the Time Division-Code Division Multiple Access burst signal that measurement other wireless base station beyond the above-mentioned wireless base station receives and from removing between the beginning time location of the Time Division-Code Division Multiple Access burst signal that receives from this wireless base station of above-mentioned mobile radio station wireless connections the time difference after the regular time difference
Information is sent to the above-mentioned wireless base station of present wireless connections.
4. mobile communication system according to claim 2 is characterized in that:
Mobile radio station has:
From the spread coded signals that the wireless base station is sent here, take out the not relevant collection of letters of the original signal of extended coding/anti-extended coding operational part;
The Time Division-Code Division Multiple Access signal that has been carried out anti-extended coding by the above-mentioned relevant collection of letters/anti-extended coding operational part is carried out demodulation, take out the channel CH collection of letters/TDMA demodulation section of required signal from the form of the signal that obtained;
According to the signal that takes out by the above-mentioned channel CH collection of letters/TDMA demodulation section, information signal is carried out giving after the analogy decode digitaltoanalogconversion portion of man machine interface portion;
Information signal from above-mentioned man machine interface portion is carried out digitally coded analog-to-digital conversion portion;
The multiplexed channel CH of signal that compiled sign indicating number by above-mentioned analog-to-digital conversion portion is posted a letter/the multiplexed portion of TDMA;
The extended code of our station is distributed in use, makes by above-mentioned channel CH to post a letter/ extended coding operational part that multiplexed multiplexed information of TDMA is expanded on frequency axis;
Instruction according to the wireless base station, control, adjust the launch time of paired pulses string signal, described burst signal for emission by the burst signal of the information behind the above-mentioned extended coding operational part extended coding, measure the beginning time location of the Time Division-Code Division Multiple Access burst signal that receives from the wireless base station and send to time set time measurement portion in the pulse train control/frame of having removed the time difference of set time after poor between the beginning time location of Time Division-Code Division Multiple Access burst signal of this wireless base station with the sheet speed unit that uses in the time-division cdma communication; And
Produce sheet speed of using in the above-mentioned Time Division-Code Division Multiple Access communication and the extended code of distributing to our station, their are supplied with the extended code generator sheet rate generator of time set time measurement portion in pulse train control/frame, the relevant collection of letters/anti-extended coding operational part or extended coding operational part.
5. mobile communication system according to claim 2 is characterized in that:
The wireless base station has:
A plurality of signal processing parts, these signal processing parts have respectively: the relevant collection of letters/anti-extended coding operational part that takes out original signal from spread coded signals; Time Division-Code Division Multiple Access signal behind the anti-extended coding is carried out demodulation, take out the channel CH collection of letters/TDMA demodulation section of required signal; Export to the transformation component that network interface portion uses after the signal interpretation of taking out become information signal; Transformation component to the usefulness of encoding from the information signal of network interface portion input; The multiplexed channel CH of signal behind the coding is posted a letter/the multiplexed portion of TDMA; The extended coding operational part that on frequency axis, multiplexed information is launched; The launch time of the burst signal of the information behind control, the adjustment emission extended coding, the interior time set time measurement portion of pulse train control/frame that carries out interior time set of frame and time measurement; And measuring speed of generation time and the extended code generator sheet rate generator of distributing to the extended code of our station; And
Signal from above-mentioned each signal processing part output is carried out exporting to the portion of posting a letter after the add operation, and the signal allocation that receiving part is received is given the signal allocation addition operation division of above-mentioned each signal processing part simultaneously.
6. mobile communication system according to claim 5 is characterized in that:
In at least a portion signal processing part of wireless base station,
The transformation component that to decipher usefulness to information signal is exported to the analog network interface portion as digital-analog conversion portion after being used for being decoded into information signal with the signal imitation that the channel CH collection of letters/TDMA demodulation section takes out,
To encode the transformation component of usefulness as analog-to-digital conversion portion to information signal, and be used for the information signal from above-mentioned analog network interface portion input is carried out digital coding.
7. mobile communication system according to claim 4 is characterized in that:
The channel CH collection of letters/TDMA demodulation section of mobile radio station has: the multiplexing separated part that the information signal to comprising in the time slot of our station that will select from a plurality of time slots separates with control information; The information signal memory of the above-mentioned information signal of temporary transient storage; And the control information memory of temporarily storing above-mentioned control information,
Channel CH posts a letter/and the multiplexed portion of TDMA has: the information signal memory of the information signal that temporary transient storage sends; The control information memory of the control information that temporary transient storage sends; And synthetic above-mentioned information signal and control information, in distributing to the time slot of our station, make its multiplexed multiplexing synthetic portion,
In above-mentioned mobile radio station, be provided with the control information from the wireless base station is deciphered,, this mobile radio station is indicated various functions, the control information processor of using to above-mentioned wireless base station its response pass according to the information after the decoding.
8. mobile communication system of carrying out two-way communication with the Time Division-Code Division Multiple Access mode between a plurality of mobile radio stations and at least one wireless base station is characterized in that:
As the mobile communication system of above-mentioned mobile communication system employing with the shared mode of TDMA/ Time Division-Code Division Multiple Access in the time slot of the frame formation of the time slot insertion TDMA mode of above-mentioned Time Division-Code Division Multiple Access mode,
Above-mentioned mobile radio station has:
The channel CH collection of letters/TDMA demodulation section receives the signal send here from the wireless base station, and the Time Division-Code Division Multiple Access signal is carried out demodulation, and takes out required signal from the form of the signal that obtained;
Channel CH posts a letter/the multiplexed portion of TDMA, and the Time Division-Code Division Multiple Access signal is carried out multiplexed and gives the wireless base station;
Time measurement portion, with receive in the above-mentioned channel CH collection of letters/TDMA demodulation section and demodulation after the beginning time location and the above-mentioned channel CH of Time Division-Code Division Multiple Access signal post a letter/give among multiplexed of the TDMA this wireless base station the Time Division-Code Division Multiple Access signal the beginning time location between removed time difference after the set time difference, measure with the sheet speed unit that uses in the Time Division-Code Division Multiple Access communication; And
The sheet rate generator produces the sheet speed of using in the above-mentioned Time Division-Code Division Multiple Access communication, and with its service time measurement section,
The mobile exchange station of having accommodated a plurality of wireless base stations has following function: according to the above-mentioned time difference information of collecting from above-mentioned wireless base station, calculate the distance of above-mentioned wireless base station and mobile radio station, and store this range information.
9. mobile communication system according to claim 8 is characterized in that:
Distance between a plurality of wireless base stations of mobile exchange station measurement mobile radio station and periphery, and monitor the distance of this measurement, if wireless base station and the also short wireless base station of the distance between the above-mentioned mobile radio station than present connection are arranged, just send the sign on of conversion, so that reset the wireless loop between the wireless base station of lacking with distance.
10. mobile communication system according to claim 9 is characterized in that:
When mobile exchange station sends the sign on of conversion in the nearest wireless base station of the mobile radio station of adjusting the distance, be under another user's the situation of wireless base station in above-mentioned wireless base station, sharing system of accommodating via this mobile exchange station and above-mentioned another user's mobile exchange station send the sign on of conversion to the above-mentioned mobile radio station of distance nearest wireless base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101416999A CN1937846B (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101416999A CN1937846B (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
| CN 97198643 CN1233375A (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97198643 Division CN1233375A (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
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| Publication Number | Publication Date |
|---|---|
| CN1937846A CN1937846A (en) | 2007-03-28 |
| CN1937846B true CN1937846B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97198643 Pending CN1233375A (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
| CN2006101416999A Expired - Lifetime CN1937846B (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 97198643 Pending CN1233375A (en) | 1997-08-08 | 1997-08-08 | Mobile communication system |
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| CN (2) | CN1233375A (en) |
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| US10034205B2 (en) * | 2010-10-01 | 2018-07-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Positioning measurements and carrier switching in multi-carrier wireless communication networks |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094204A (en) * | 1992-12-01 | 1994-10-26 | 诺基亚移动电话有限公司 | The method and system of transfer of data |
| CN1115196A (en) * | 1993-09-09 | 1996-01-17 | 艾利森.Ge.流动通讯有限公司 | Navigation assistance for call handling in mobile telephone systems |
| US5646632A (en) * | 1994-11-14 | 1997-07-08 | Lucent Technologies Inc. | Method and apparatus for a portable communication device to identify its own location |
-
1997
- 1997-08-08 CN CN 97198643 patent/CN1233375A/en active Pending
- 1997-08-08 CN CN2006101416999A patent/CN1937846B/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094204A (en) * | 1992-12-01 | 1994-10-26 | 诺基亚移动电话有限公司 | The method and system of transfer of data |
| CN1115196A (en) * | 1993-09-09 | 1996-01-17 | 艾利森.Ge.流动通讯有限公司 | Navigation assistance for call handling in mobile telephone systems |
| US5646632A (en) * | 1994-11-14 | 1997-07-08 | Lucent Technologies Inc. | Method and apparatus for a portable communication device to identify its own location |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233375A (en) | 1999-10-27 |
| CN1937846A (en) | 2007-03-28 |
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