CN1722644B - Communication control method - Google Patents
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- CN1722644B CN1722644B CN200510089482.3A CN200510089482A CN1722644B CN 1722644 B CN1722644 B CN 1722644B CN 200510089482 A CN200510089482 A CN 200510089482A CN 1722644 B CN1722644 B CN 1722644B
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000005540 biological transmission Effects 0.000 claims description 199
- 238000010295 mobile communication Methods 0.000 claims description 75
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 description 80
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- 230000015654 memory Effects 0.000 description 17
- 230000005684 electric field Effects 0.000 description 15
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- 241001269238 Data Species 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012508 change request Methods 0.000 description 4
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Abstract
This invention relates to a communication controlling method, used in moving communication system which comprises one base station and one mobile station in the covered area, and used for controlling the wireless communicating between the base station and the mobile station, characterized in that the method comprises the following steps: a) deciding whether the needed transmitting power when wirelessly communicating between the base station and the mobile station is in the capability range; b) when deciding that the transmitting power is within the capability range, making sure the transmitting speed is the effective speed which is fit for wireless communication between said base station and said mobile station.
Description
The divisional application that the application is application number is 200310116111.0, the applying date is the parent application on December 10th, 1997, this female case be PCT/JP9704551 at first international application, international filing date is on December 10th, 1997.
Technical field
The present invention relates to the mobile communication system that setting makes the asymmetric data communication channel that the transmission speed of the communication data transmitted to base station from travelling carriage is different from the transmission speed of the communication data transmitted from base station to travelling carriage.
Background technology
Fig. 1 is the structure chart representing such as existing mobile communication system disclosed in Unexamined Patent 8-331153 publication.In the drawings, 1 is movably be arranged on the travelling carriage in automobile etc., 2 is transmit the low speed dispensing device that transmission speed is the communication data of low speed to base station 5, 3 is receive the high speed receiving system that transmission speed is communication data at a high speed from base station 5, 4 is up links of data communication channel, 5 is the base stations of carrying out radio communication with the travelling carriage 1 belonged in wireless coverage area, 6 is receive from travelling carriage 1 the low speed receiving system that transmission speed is the communication data of low speed, 7 is transmit to travelling carriage 1 the high speed dispensing device that transmission speed is communication data at a high speed, 8 is down links of data communication channel.
Below, action is described.
Such as, when travelling carriage 1 needs to transmit communication data to the communicator (not shown) be connected with public network, receive the control channel of base station 5, and called out by the control channel distributing to travelling carriage 1.
Namely, travelling carriage 1, control information required for radio communication (such as, be used to indicate to send with the transmission speed of low speed when sending communication data to base station 5 and when from receiving the information that transmission speed is the communication data of high speed during the received communication data of base station 5) is sent to base station 5 by control channel.
Then, when sending control information from travelling carriage 1, the control information sent from travelling carriage 1 is sent to not shown mobile switching centre etc. by base station 5, permitted the intention of travelling carriage 1 in this mobile switching centre after, base station 5 is intended to the message notice travelling carriage 1 be allowed by control channel.
Thus, the transmission speed of the communication data transmitted to base station 5 from travelling carriage 1 is set to the transmission speed of low speed, and the transmission speed of the communication data transmitted to travelling carriage 1 from base station 5 is set as transmission speed at a high speed, thus realize the up link 4 asymmetric radio communication different with the transmission speed of down link 8.
Because existing mobile communication system mode is as described above formed, therefore the asymmetric radio communication that up link 4 is different with the transmission speed of down link 8 can be realized, but owing to there is no the device of setting change communication data transfer speed, so, although there is the transmission speed of communication data once the rear data volume passing in time later of setting there occurs the problem that change can not change to the transmission speed adapted with this data volume.
Summary of the invention
The present invention develops for solving problem as above, its objective is the transmission speed that provides a kind of communication data once still can the mobile communication system of appropriate change communication data transfer speed after setting.
According to a kind of communication control unit of the present invention, for controlling the communication between the base station of carrying out radio communication and the travelling carriage belonging in the wireless coverage area of this base station, it is characterized in that, in advance the communication speed between described base station and described mobile radio station is notified described base station and described travelling carriage; Described base station and described travelling carriage is notified with by the timing starting to communicate by notified described communication speed.
According to a kind of base station of the present invention, for the instruction that basis notifies from communication control unit, radio communication is carried out belonging in wireless coverage area between travelling carriage, it is characterized in that, accept the information about the communication speed between described travelling carriage notified in advance from described communication control unit; Accept the timing that notifies from described communication control unit, as about with the timing information starting by described communication speed between described travelling carriage to communicate; With in described timing, start the communication between described travelling carriage by described communication speed.
According to a kind of travelling carriage of the present invention, for the instruction that basis notifies from communication control unit, radio communication is carried out between base station, described travelling carriage belongs to the travelling carriage in the wireless coverage area of described base station, it is characterized in that, accept the information about the communication speed between described base station notified in advance from described communication control unit; Accept the timing that notifies from described communication control unit, as about with the timing starting by described communication speed between described base station to communicate; With in described timing, start the communication between described base station by described communication speed.
In mobile communication system of the present invention, mobile switching centre, according to the request from travelling carriage or the communicator that is connected with public network etc. etc., changes the transmission speed of the communication data transmitted from travelling carriage to communicator.
In this manner, there is such effect, that is, in the transmission speed of communication data once after being set, even if the data volume being sent to the communication data of communicator from travelling carriage changes, also still suitably can change to the transmission speed adapted to data volume.
In mobile communication system of the present invention, mobile switching centre, according to the request from travelling carriage or communicator, mobile switching centre changes the transmission speed of the communication data transmitted from communicator to travelling carriage.
In this manner, there is such effect, that is, in the transmission speed of communication data once after being set, even if the data volume being sent to the communication data of travelling carriage from communicator changes, also still suitably can change to the transmission speed adapted to data volume.
In mobile communication system of the present invention, mobile switching centre, according to the request from travelling carriage or communicator, separately change the transmission speed of the communication data transmitted from travelling carriage to communicator or the communication data transmitted from communicator to travelling carriage.
In this manner, there is such effect, namely, in the transmission speed of communication data once after being set, even if the data volume of the communication data being sent to communicator from travelling carriage or the communication data that is sent to travelling carriage from communicator changes, the transmission speed adapted to data volume also suitably can be changed to.
In mobile communication system of the present invention, the transmission speed after being changed by mobile switching centre is the speed belonging to high speed data transfer scope.
In this manner, there is the effect that the transmission time can be made to shorten when data volume is very big.
In mobile communication system of the present invention, the transmission speed after being changed by mobile switching centre is the speed belonging to medium speed data transmission range.
In this manner, there is the effect that can realize the radio communication adapted with data volume.
In mobile communication system of the present invention, the transmission speed after being changed by mobile switching centre is the speed belonging to slow data transmission scope.
In this manner, there is the effect that can realize the radio communication adapted with data volume.
Mobile communication system of the present invention, within the scope of slow data transmission, comprises intermittent data transmission.
In this manner, there is the effect that data communication channel can be discharged in the time-bands of not transport communication data.
In mobile communication system of the present invention, as the transmission means of high speed data transfer, have employed TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.
In this manner, have aforesaid way etc. can be adopted to carry out the effect of high speed data transfer.
In mobile communication system of the present invention, as the transmission means of medium speed data transmission, have employed TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.
In this manner, have aforesaid way etc. can be adopted to carry out the effect of medium speed data transmission.
In mobile communication system of the present invention, as the transmission means of slow data transmission, have employed TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.
In this manner, have aforesaid way etc. can be adopted to carry out the effect of slow data transmission.
Mobile communication system of the present invention, is provided with transfering state control processor in mobile switching centre, when there is multiple travelling carriage by base station transmission and reception communication data, for managing the state transitions of the transmission speed of each travelling carriage.
In this manner, there is such effect, even if that is, there is multiple travelling carriage by base station transmission and reception communication data, also can change the transmission speed of communication data exactly.
Mobile communication system of the present invention, is provided with two priority classes processor in mobile switching centre, for the alter operation of the transmission speed of the setting operation and mobile switching centre that manage the data communication channel of mobile switching centre.
In this manner, having can the effect of the reliably setting operation etc. of management data communication channel.
In mobile communication system of the present invention, mobile switching centre, when travelling carriage carries out position login, the accessible transmission speed of logging mobile station, logs in the speed switching time of this travelling carriage simultaneously.
In this manner, there is the effect that mobile switching centre can change rapidly communication data transfer speed as required.
Mobile communication system of the present invention, is provided with information-storing device in mobile switching centre, for the accessible transmission speed of storing mobile station, stores the speed switching time of this travelling carriage simultaneously.
In this manner, there is the effect that mobile switching centre reliably can grasp the accessible transmission speed of travelling carriage etc.
In mobile communication system of the present invention, when travelling carriage and communicator start the transmission of communication data, mobile switching centre, the maximum transfer speed that selected current data communication channel can be allowed in the accessible transmission speed of travelling carriage, and by the transfer rate message notice base station of this transmission speed of instruction and travelling carriage.
In this manner, there is the effect that can shorten communication data transfer speed.
In mobile communication system of the present invention, after by transfer rate message notice base station and travelling carriage, when have passed through speed switching time of the travelling carriage be stored in information-storing device, instruction is switched switching timing message notice base station and the travelling carriage of transmission speed.
In this manner, there is the effect that quickly and reliably can change transmission speed.
In mobile communication system of the present invention, after the notice receiving switching timing information from mobile switching centre, from the time slot received in the initial frame after this notice, carry out the transmission and reception of communication data with new transmission speed.
In this manner, there is the effect that quickly and reliably can change transmission speed.
In mobile communication system of the present invention, when translational speed is in the scope of walking speed, as detected, this translational speed has exceeded walking speed scope, then the automobile driving speed information of this situation of instruction is notified mobile switching centre by base station.
In this manner, have and can change time slot and make it be suitable for the effect of automobile driving speed.
In mobile communication system of the present invention, when translational speed is in the scope of automobile driving speed, as detected, this translational speed is reduced to below automobile driving speed scope, then the automobile driving speed of this situation of instruction is removed information and notify mobile switching centre by base station.
In this manner, have and can change time slot and make it be suitable for the effect of walking speed.
Mobile communication system of the present invention, is provided with information-storing device in mobile switching centre, when automobile driving speed information being notified mobile switching centre by base station from travelling carriage, for storing this automobile driving speed information.
In this manner, there is the translational speed reliably grasping travelling carriage and remain on effect within the scope of automobile driving speed.
Mobile communication system of the present invention, is provided with information-storing device in mobile switching centre, when automobile driving speed being removed information by base station notice mobile switching centre from travelling carriage, removes information for storing this automobile driving speed.
In this manner, there is the translational speed reliably grasping travelling carriage and remain on effect within the scope of walking speed.
Mobile communication system of the present invention, is provided with mode setting process device in mobile switching centre, when storing automobile driving speed information in information-storing device, is suitable for automobile driving speed for changing time slot to make the guard time of data communication channel.
In this manner, there is the effect that the guard time of data communication channel can be remained on appropriate value.
Mobile communication system of the present invention, is provided with mode setting process device in mobile switching centre, when storing automobile driving speed and remove information in information-storing device, is suitable for walking speed for changing time slot to make the guard time of data communication channel.
In this manner, there is the effect that the guard time of data communication channel can be remained on appropriate value.
In mobile communication system of the present invention, when transmitting communication data from communicator to travelling carriage, this communicator is by the data volume of communication data notice mobile switching centre.
In this manner, there is such effect, that is, because mobile switching centre can grasp the data volume of communication data, so when communicator transmits a large amount of communication datas, can judge whether travelling carriage can reliably receive a large amount of communication datas.
In mobile communication system of the present invention, when sending communication data from travelling carriage to communicator, this travelling carriage is by the data volume of communication data notice mobile switching centre.
In this manner, there is such effect, that is, because mobile switching centre can grasp the data volume of communication data, so when travelling carriage transmits a large amount of communication datas, can judge whether communicator can reliably receive a large amount of communication datas.
In mobile communication system of the present invention, when sending communication data from communicator or travelling carriage to other communicators or other travelling carriages, the data volume of communication data is notified mobile switching centre by the communicator or the travelling carriage that send communication data.
In this manner, there is such effect, that is, because mobile switching centre can grasp the data volume of communication data, so when communicator or travelling carriage transmit a large amount of communication datas, can judge whether other communicators or other travelling carriages can reliably receive a large amount of communication datas.
In mobile communication system of the present invention, according to the actual maximum transfer speed of carrying out transmitting of condition adjudgement of the executable maximum transfer speed of travelling carriage and current empty data communication channel, simultaneously, when starting transport communication data with this maximum transfer speed, judge whether within certain hour, to transmit the data volume from communicator notice, and when being judged as to transmit within certain hour, the transmission of refusal communication data.
In this manner, there is the effect of the reception mistake can avoiding communication data.
In mobile communication system of the present invention, according to the actual maximum transfer speed of carrying out transmitting of condition adjudgement of the executable maximum transfer speed of travelling carriage and current empty data communication channel, simultaneously, when starting transport communication data with this maximum transfer speed, judge whether within certain hour, to transmit the data volume from travelling carriage notice, and when being judged as to transmit within certain hour, the transmission of refusal communication data.
In this manner, there is the effect of the reception mistake can avoiding communication data.
In mobile communication system of the present invention, according to the actual maximum transfer speed of carrying out transmitting of condition adjudgement of the executable maximum transfer speed of travelling carriage and current empty data communication channel, simultaneously, when starting transport communication data with this maximum transfer speed, judge whether within certain hour, to transmit the data volume from the communicator or travelling carriage notice transmitting communication data, and when being judged as to transmit within certain hour, the transmission of refusal communication data.
In this manner, there is the effect of the reception mistake can avoiding communication data.
In mobile communication system of the present invention, when carrying out the handover of travelling carriage, mobile switching centre is according to the transmission speed between the Status Change travelling carriage of the empty data communication channel of handover-target base station and base station.
In this manner, have and make the optimized effect of the transmission speed of communication data whenever carrying out the handover of travelling carriage.
Mobile communication system of the present invention, determined handover-target base station before the handover carrying out travelling carriage, judged the state of the empty data communication channel of handover-target base station simultaneously.
In this manner, there is the effect of the wireless connections disconnection that can prevent from occurring along with the handover of travelling carriage.
In mobile communication system of the present invention, detect the electric field strength of the electric wave from all Base Transmitter adjoined with the base station current connection, and this electric field strength is circulated a notice of to mobile switching centre.
In this manner, there is the effect that the standard of selected best base station can be supplied to mobile switching centre.
In mobile communication system of the present invention, when receiving instruction from mobile switching centre, electric field strength is circulated a notice of to mobile switching centre by travelling carriage.
In this manner, there is the effect that can obtain this electric field strength when mobile switching centre needs electric field strength.
In mobile communication system of the present invention, when receiving instruction from base station, electric field strength is circulated a notice of to mobile switching centre by travelling carriage.
In this manner, have when base station judges that mobile switching centre needs mobile switching centre can be made to obtain the effect of this electric field strength during electric field strength.
In mobile communication system of the present invention, the electric field strength of the electric wave from each Base Transmitter is compared mutually, and the base station of launching the maximum electric wave of electric field strength is determined as handover-target base station.
In this manner, there is the effect that the base station of the best can be determined as handover-target base station.
In mobile communication system of the present invention, the selected data communication channel that can realize maximum transfer speed within the scope of the executable maximum transfer speed of travelling carriage in the empty data communication channel of handover-target base station.
In this manner, have and make the optimized effect of the transmission speed of communication data whenever carrying out the handover of travelling carriage.
In mobile communication system of the present invention, transmission speed accelerates after the handover carrying out travelling carriage, before change transmission speed, carry out handover.
In this manner, there is the effect carrying out rapidly the handover of travelling carriage.
In mobile communication system of the present invention, after the handover carrying out travelling carriage when transmission speed step-down, after change transmission speed, carry out handover.
In this manner, there is the effect of the wireless connections disconnection that can prevent from occurring along with the handover of travelling carriage.
In mobile communication system of the present invention, when accelerating the transmission speed of the communication data transmitted from travelling carriage to communicator, before making transmission speed quickening, confirm the transmitted power of travelling carriage.
In this manner, there is the effect that the transmission speed that can judge in fact whether to make communication data is accelerated.
In mobile communication system of the present invention, when accelerating the transmission speed of the communication data transmitted from communicator to travelling carriage, before making transmission speed quickening, confirm the transmitted power of base station.
In this manner, there is the effect that the transmission speed that can judge in fact whether to make communication data is accelerated.
In mobile communication system of the present invention, by confirming that the received power of base station confirms the transmitted power of travelling carriage.
In this manner, there is the effect that reliably can confirm the transmitted power of travelling carriage.
In mobile communication system of the present invention, by confirming that the received power of travelling carriage confirms the transmitted power of base station.
In this manner, there is the effect that reliably can confirm the transmitted power of base station.
In mobile communication system of the present invention, the instruction notice travelling carriage of transmission power level should be improved, the instruction informing base station of received power should be circulated a notice of simultaneously.
In this manner, there is the effect that the transmission speed that can judge in fact whether to make communication data is accelerated.
In mobile communication system of the present invention, the instruction informing base station of transmission power level should be improved, the instruction notice travelling carriage of received power should be circulated a notice of simultaneously.
In this manner, there is the effect that the transmission speed that can judge in fact whether to make communication data is accelerated.
In mobile communication system of the present invention, when the increase of the transmitted power of travelling carriage can not adapt to the speed change of transmission speed, the change of refusal transmission speed.
In this manner, there is such effect, that is, when transmission speed can not be made to accelerate, the invalid processing procedure still trying hard to accelerate transmission speed can be prevented, meanwhile, the communication abnormality occurred along with this invalidation process can be prevented.
In mobile communication system of the present invention, when the increase of the transmitted power of base station can not adapt to the speed change of transmission speed, the change of refusal transmission speed.
In this manner, there is such effect, that is, when transmission speed can not be made to accelerate, the invalid processing procedure still trying hard to accelerate transmission speed can be prevented, meanwhile, the communication abnormality occurred along with this invalidation process can be prevented.
In mobile communication system of the present invention, when the increase of the transmitted power of travelling carriage can adapt to the speed change of transmission speed, allow the change of transmission speed.
In this manner, there is the effect that can make communication data transfer speed high speed.
In mobile communication system of the present invention, when the increase of the transmitted power of base station can adapt to the speed change of transmission speed, allow the change of transmission speed.
In this manner, there is the effect that can make communication data transfer speed high speed.
In mobile communication system of the present invention, when making transmission speed double, transmitted power should be made to improve the instruction notice travelling carriage of 3 decibels.
In this manner, there is the effect that transmission speed can be made to double.
In mobile communication system of the present invention, when making transmission speed double, transmitted power should be made to improve the instruction informing base station of 3 decibels.
In this manner, there is the effect that transmission speed can be made to double.
Accompanying drawing explanation
Fig. 1 is the structure chart representing existing mobile communication system.
Fig. 2 is the structure chart of the mobile communication system representing the invention process form 1.
Fig. 3 is presentation surface to the data structure diagram of the structure of time slot of the PCS of Time Division-Code Division Multiple Access, high speed TDMA and low speed TDMA etc. and honeycomb.
Fig. 4 is the state transition diagram of mobile communication system.
Fig. 5 is the flow chart of the action of the mobile communication system that the invention process form 1 is described.
Fig. 6 is the detailed structure view of the mobile switching centre of the mobile communication system representing the invention process form 2 in detail.
Fig. 7 is the state transition diagram of the control subject that mobile communication system is described.
Fig. 8 is the transfer process figure of the mobile communication system representing the invention process form 3.
Fig. 9 is the tabular drawing of the content represented for the accessible transmission speed of storing mobile station and the mobile station information memory 35 of speed switching time.
Figure 10 is the transfer process figure of the mobile communication system representing the invention process form 4.
Figure 11 is the transfer process figure of the mobile communication system representing the invention process form 5.
Figure 12 is the flow chart of the confirmation process before representing handover.
Figure 13 is the transfer process figure of the mobile communication system representing the invention process form 6.
Figure 14 is the transfer process figure of the mobile communication system representing the invention process form 7.
Figure 15 represents that transmitted power confirms the flow chart of process.
Embodiment
Below, in order to the present invention will be described in more detail, illustrate for implementing optimal morphology of the present invention with reference to accompanying drawing.
Example 1
Fig. 2 is the structure chart of the mobile communication system representing the invention process form 1.In the drawings, 11 is the databases (communicator) be connected with public network 12,12 is public network (public service telephone nets: PSTN), 13,14,15 is the switching centers belonging to PSTN12,16 ~ 22 are mounted in communicator, portable type communicator or semifixed WLL (wireless local loop) platform in automobile etc., below, these communicators are called travelling carriage.23 ~ 26 is mutually exchange control information needed for radio communication by control channel and travelling carriage 16 grade belonged in wireless coverage area to be sent by data communication channel and receiving package contains the base station of the communication data of voice data and pictorial data etc. simultaneously, 23a is the wireless coverage area of base station 23, 24a is the wireless coverage area of base station 24, 25a is the wireless coverage area of base station 25, 26a is the wireless coverage area of base station 26, 27, 28, 29 is receive control information needed for data communication from the database 11 be connected with PSTN12 receive by base station 23 etc. the control information that sends from travelling carriage 16 simultaneously and be set in the mobile switching centre of the transmission speed of the communication data of transmission and reception between this travelling carriage 16 grade and database 11 etc. according to the control information of two aspects.
Below, action is described.
First, the Subscriber Number in mobile communication system, user ID, charging, checking etc. are the control informations irrelevant with the characteristic of communication medium.
Unlike this, the allowable transmission of user terminal (travelling carriage 16 or database 11 etc.) or speed switching time, the setting according to each user terminal or system can be very different.
Below, in this manual, describe the process depending on the transmission speed of communication medium characteristic etc. in detail, the former is then no longer ad hoc mentioned.
First, to the mobile switching centre 27 etc. that base station 23 etc. controls, as shown in Figure 2, wired connection is carried out with PSTN12, but travelling carriage 16 grade and base station 23 etc. adopt the modulation system of digital modulation mode to send and reception control signal etc., and with frequency division multiple access time division duplex communication mode (Frequency Division Mulitiple Access/Time Division Duplex:FDMA/TDD mode), code division multiple access time division duplex communication mode (Code DivisionMulitiple Access/Time Division Duplex:CDMA/TDD mode), multicarrier time-division multiple access frequency duplex communications mode (Multi-Carriers Time DivisionMulitiple Access/Frequency Division Duplex:TDMA/FDD mode), TDMA/TDD mode, Time Division-Code Division Multiple Access/FDD mode or Time Division-Code Division Multiple Access/TDD mode etc. carry out wireless connections.
Fig. 3 show have Time Division-Code Division Multiple Access letter with and tdma signal low/medium/high-speed data signal and the transmission capacity that is up, down channel of high speed data transfer etc. be asymmetric and set up the shared mobile communication system example of down link T7.
Wherein, 59 represent that frame length .53,54 represents half frame length, and the descending time slot length from base station to travelling carriage of 55 expression high-speed data communications, 56 represent the ascending time slot length from travelling carriage to base station.
Here, Fig. 3 illustrates the structure of time slot of PCS (PCS Personal Communications System) towards Time Division-Code Division Multiple Access and honeycomb, and #41-0 ~ 3 are the time slots for PCS, and #47-T1/R1, T2/R2 are the time slots for honeycomb.
In addition, time slot #44-T0/R0, time slot #51-T0/R0, T1/R1, T2/R2, T3, T7A for TDMA high-speed data communication for the communication of TDMA medium speed data and the time slot #52-T7C for Time Division-Code Division Multiple Access high-speed data communication is also shown.
But, to other low speed tdma slots (mark * person), voice data, low speed data or the example as control channel are shown.
In figure 3, the time slot of down link is T0, T1, T2, T3 and T7 five time slots, and the time slot of up link is R0, R1 and R2 tri-time slots, forms asymmetrical time division duplex communication mode (TDD mode).
Below, with the flow chart of the state transition diagram of Fig. 4 and Fig. 5 illustrate the radiolink between travelling carriage 16 etc. and base station 23 etc. state transitions (but, when there is multiple travelling carriage be connected with base station radio, quantity should be had and be equivalent to the state transition diagram same with Fig. 4 that this moves number of units, and here for ease of illustrating, the state transitions between travelling carriage 16 and base station 23 is only described).
First, when travelling carriage 16 is called out, in state J1, travelling carriage 16 receives the control channel that base station 23 sends, and by the time slot request wireless connections (step ST1) in the control channel of distributing to travelling carriage 16.
Then, when sending radio connection request from travelling carriage 16, mobile switching centre 27, receives the request of wireless connections by base station 23, judge that wireless connections are whether normal simultaneously, and between travelling carriage 16 and base station 23 set conversation channel (step ST2).
On the other hand, (the calling of base station 23 when base station 23 is called out, the calling simultaneously carried out with the calling of database 11), in state J1, base station 23, uses the broadcast channel in control channel to send the telephone number (step ST3) of the travelling carriage 16 of being specified by database 11.
Then, when the travelling carriage 16 receiving its own telephone number responds base station 23 by specified control channel, mobile switching centre 27 is set conversation channel or low speed data channel (step ST4) between travelling carriage 16 and base station 23.
But when set conversation channel, mobile switching centre 27 receives control information needed for radio communication by control channel from travelling carriage.Such as, the information such as accessible transmission speed of receiving mobile 16.
Then, between travelling carriage 16 and base station 23 after set conversation channel, the on-line operation person of PSTN12, and to be carried out (step ST5) such as the checkings of travelling carriage 16 from travelling carriage 16 receiving mobile ID by the FACCH (fast access control channel) of talk channel.
After the on-line operation person by PSTN12 verifies travelling carriage 16, mobile switching centre 27 is setting data communication channel (step ST6, ST7) between travelling carriage 16 and base station 23, and transfers to state J2 from state J1.
Thus, the transmission and reception of communication data can be started between travelling carriage 16 and database 11, but first by database 11 for confirming whether travelling carriage 16 has the preparation property communication of the ability etc. of process communication data.
When carrying out the communication of above-mentioned preparation property, because the transmission quantity of communication data is little, so, usually the transmission speed of up link (transmitting the transmission line of communication data from travelling carriage 16 to database 11) and down link (transmitting the transmission line of communication data from database 11 to travelling carriage 16) is set in the scope (below 19.6Kbps) of slow data transmission.
Although up link and down link to be all set in the scope of slow data transmission, but up link is not necessarily consistent with the transmission speed of down link, such as, sometimes the transmission speed of up link is set as 8Kbps, and the transmission speed of down link is set as 2Kbps (setting of asymmetric radio communication).
In addition, when needing to carry out high speed data transfer or medium speed data transmission at the very start, sometimes also transmission speed is set in the scope (more than 200Kbps) of high speed data transfer or the scope (more than 19.6Kbps, below 200Kbps) of medium speed data transmission.
According to such as upper type, be set in the transmission speed of the data communication channel carrying out wireless connections between travelling carriage 16 and base station 23, and start the transmission and reception of communication data, but the data volume of communication data is not often fixing, As time goes on, data volume can change, so, under the transmission speed of initial setting, sometimes generation can not be transmitted the faults such as communication data at short notice.
Therefore, in this example 1, in the transmission speed of communication data once after being set, if there is the request that the relevant transmission speed from travelling carriage 16 or database 11 changes, then mobile switching centre 27 will consider the state of the accessible transmission speed of travelling carriage 16 and current empty data communication channel and separately change the transmission speed of up link and down link.
J3 ~ J8, illustrate mobile switching centre 27 according to the request from travelling carriage 16 or database 11, the transmission speed of up link and down link is changed after state, but the so-called intermittent data transmission in J6 ~ J8, although refer to the data transfer mode that the wireless connections that still remain travelling carriage 16 and base station 23 also exist the time-bands not transmitting communication data.When there is the state transitions transmitted to this intermittent data as distinguished, in this case, the charging of continued expense is only carried out when transport communication data, so have the advantage that communication cost can be made to become cheap, in addition, do not transmitting the time-bands of communication data, the effect that base station 23 can be made to discharge data communication channel can also played.
As can be seen from the above, according to this example 1, structurally Neng Shi mobile switching centre 27 transmission speed that separately changes the communication data transmitted from travelling carriage 16 to database 11 according to the request from travelling carriage 16 or database 11 or the transmission speed of communication data from database 11 to travelling carriage 16 that transmit from, so such effect can be obtained, namely, in the transmission speed of communication data once after being set, even if the data volume of the communication data transmitted from travelling carriage 16 to database 11 or the data volume of communication data transmitted from database 11 to travelling carriage 16 change, also the transmission speed adapted to data volume can still suitably be changed to.
Therefore, the effect setting up multi-media radio environment can also be obtained.
Example 2
Fig. 6 is the structure chart of the mobile switching centre of the mobile communication system representing the invention process form 2 in detail, in the drawings, 31 is PSTN interfaces, 32 is talk line exchange part, the 33 high-speed data storage devices playing the buffer effect of communication data when being and carrying out high speed data transfer, 34 is data number management processors, 35 is mobile station information memories that the accessible transmission speeds such as storing mobile station 16 store speed switching time of this travelling carriage 16 grade simultaneously, in addition, mobile station information memory 35 also stores automobile driving speed information or automobile driving speed removes information.
In addition, 36 is transfering state control processors, when there is multiple travelling carriage by communication data such as base station 23 transmission and reception such as grade, for managing the state transitions of the transmission speed of each travelling carriage, 37 is two priority classes processors, for managing the setting operation of the data communication channel of mobile switching centre 27, network operator is to the alter operation of the verification operation of travelling carriage 16 grade and the transmission speed of mobile switching centre 27, 38 is mode setting process devices, when exporting the change request of transmission speed, change transmission speed, simultaneously, when storing automobile driving speed information or automobile driving speed removes information in mobile station information memory 35, change time slot with the speed making the guard time of data communication channel be suitable for travelling carriage 16 grade.39 is signal processors, and 40 is base-station interfaces.In figure 6, the structure of mobile switching centre 27 is shown, mobile switching centre 28,29, also has same structure.
Below, action is described.
In above-mentioned example 1, do not specifically describe the structure of mobile switching centre 27 grade, but mobile switching centre 27 etc., form by shown in Fig. 6, in the data speed change process changing communication data transfer speed, as shown in Figure 7, mobile switching centre and base station, be used as the window of the change request of the transmission speed received from travelling carriage 16 grade or database 11, mobile switching centre 27 etc. carries the control that data speed changes process.
In addition, particularly, in mobile switching centre 27 grade, performed by mode setting process device 38 and receive the process that transmission speed changes request, and transmission speed is set, make it consistent with the speed of asking communication data transfer speed.
When database 11 such as data such as in store a large amount of geology, the earth's crust and when there is the function sending this mass data and the function receiving mass data, the situation sending and receive mass data between database 11 and travelling carriage 16 etc. can be considered as the database of One Earth One Family physics Institute.
But, when transmitting a large amount of data, if just send a large amount of data and do not manage transmission speed etc., then the transmittability of travelling carriage 16 grade or database 11 is not in full use, and data transmission period occurs sometimes and spins out and the inappropriate situation that exceeds schedule time.
Therefore, in this case, the transmission speed change that can receive from travelling carriage or database 11 due to mobile switching centre is asked and changes transmission speed, so, the effect that the transmittability of travelling carriage or database 11 can be made to be not fully exerted can be obtained.
Example 3
Fig. 8 is the transfer process figure of the mobile communication system representing the invention process form 3, and Fig. 9 is the tabular drawing of the content of the mobile station information memory 35 represented for storing the accessible transmission speed of each travelling carriage and speed switching time.
Below, action is described.
First, when travelling carriage 16 enters the wireless coverage area 23a of base station 23 (in this example 3, being described for travelling carriage 16), travelling carriage 16, sends position logging request (P1) by control channel to base station 23.
Then, when base station 23 receives the position logging request from travelling carriage 16, the position of carrying out travelling carriage 16 logs in, and this position logging request is sent to mobile switching centre 27 (P1) simultaneously.
Then, when mobile switching centre 27 receives the position logging request from base station 23, the signal of the information of the accessible transmission speed of travelling carriage (following, claim " transfer rate ") and speed switching time is indicated by service request to be sent to travelling carriage 16 (P2) by base station 23.
Therefore, at travelling carriage 16, transfer rate and speed are sent to mobile switching centre 27 rear (P3) by base station 23 switching time, mobile switching centre 27, the transfer rate be sent to from travelling carriage 16 and speed are stored in mobile station information memory 35 switching time, and the transfer rate of logging mobile station 16 etc. (with reference to Fig. 9).
Press as upper type, under the state that the transfer rate etc. of travelling carriage 16 has been logged, when database 11 or travelling carriage 16 are called out (comprising the information of the transmission speed required for indicating call side in a call) (P4, P5), mobile switching centre 27, transfer rate from the transfer rate be stored in mobile station information memory 35 required for selective call side, and by the message notice base station 23 of this transfer rate and travelling carriage 16 (P6, P7).
In addition, mobile switching centre 27, after by the message notice base station 23 of this transfer rate and travelling carriage 16, also the time is counted for starting point with the moment that sends of this notice, and when this time arrives the speed switching time be stored in mobile station information memory 35, by switching timing message notice base station 23 and travelling carriage 16 (P9, P10).Here, show mobile switching centre's 27 pairs of time countings and notify the situation of switching timing information, but also can be counted the time according to the instruction of mobile switching centre 27 by base station 23 and by switching timing message notice travelling carriage 16.
Then, after notifying switching timing information from mobile switching centre 27, base station 23 and travelling carriage 16, start the transmission and reception (P11, P12) of communication data with the transmission speed that the transfer rate information with previous notification is corresponding.
According to such as upper type, the transmission and reception of communication data can be started, but when have issued the change request of transmission speed by database 11 or travelling carriage 16 in the communication at communication data (P13, P14), mobile switching centre 27, the transfer rate corresponding with this change request is selected from the transfer rate be stored in mobile station information memory 35, and by the message notice base station 23 of this transfer rate and travelling carriage 16 (P15, P16).
In addition, mobile switching centre 27, after by the message notice base station 23 of this transfer rate and travelling carriage 16, also the time is counted for starting point with the moment that sends of this notice, and when this time arrives the speed switching time be stored in mobile station information memory 35, by switching timing message notice base station 23 and travelling carriage 16 (P18, P19).
Then, after notifying switching timing information from mobile switching centre 27, base station 23 and travelling carriage 16, restart the transmission and reception (P20,21) of communication data from the time slot in the initial frame after receiving this notice with new transmission speed.
According to such as upper type; namely the transmission speed of communication data is changed; but when the change along with transmission speed also sends the request of the guard time changing TDMA from travelling carriage 16; mobile switching centre 27, by the message notice base station 23 of guard time new for instruction and travelling carriage 16 (P23, P24).
In addition; mobile switching centre 27; after by the message notice base station 23 of guard time new for instruction and travelling carriage 16; also the time is counted for starting point with the moment that sends of this notice; and when the time that this time arrival travelling carriage 16 is specified, by switching timing message notice base station 23 and travelling carriage 16 (P26, P27).
After notifying switching timing information from mobile switching centre 27, base station 23 and travelling carriage 16, restart the transmission and reception (P28,29) of communication data with new guard time.
As can be seen from the above; according to this example 3; when travelling carriage 16 carries out position storage; structurally make the transfer rate of mobile switching centre 27 storing mobile station 16; store the transmission speed switching time of this travelling carriage 16 simultaneously; so, the effect making mobile switching centre 27 can change rapidly communication data transfer speed or guard time as required can be obtained.
In addition, in above-mentioned example 3, also show the situation of asking the guard time changing TDMA along with the change of transmission speed, specifically, a kind of situation is, when translational speed within the scope of walking speed (such as, speed per hour is at below 4km) time, as detected, this translational speed has exceeded walking speed scope, then the automobile driving speed information of this situation of instruction is notified mobile switching centre by base station, thus guard time is changed in request, and another kind of situation is, when translational speed in the scope of automobile driving speed (such as, speed per hour is at more than 4km) time, as detected, this translational speed is reduced to below automobile driving speed scope, then the automobile driving speed of this situation of instruction is removed information and notify mobile switching centre by base station, thus guard time is changed in request.
Then; automobile driving speed information or automobile driving speed are removed information to be stored in the mobile station information memory 35 of mobile switching centre 27; and when storing automobile driving speed information or automobile driving speed removes information in this mobile station information memory 35; mode setting process device 38, changes time slot and is suitable for walking speed or automobile driving speed to make the guard time of data communication channel.
Example 4
Figure 10 is the transfer process figure of the mobile communication system representing the invention process form 4.
Below, action is described.
First, the same with above-mentioned example 1, by sending data transfer request by travelling carriage 16, setting data communication channel between travelling carriage 16 and base station 23, and start the transmission and reception (in this example 4, being described for travelling carriage 16) of communication data.
But, in this example 4, when travelling carriage 16 requested database 11 sends data (P31), database 11, by the data volume of communication data notice mobile switching centre 27, asks mobile switching centre 27 to provide the information (P32) of the executable maximum transfer speed of travelling carriage 16 simultaneously.
Then, due to maximum can the transmission performance of transmission speed by travelling carriage 16 and the Determines of current empty data communication channel, so, mobile switching centre 27, with reference to the transfer rate being stored in the travelling carriage 16 in mobile station information memory 35, confirm the state of current empty data communication channel simultaneously, thus determine in fact can carry out the maximum transfer speed transmitted.
Then, when starting the transmission of communication data with the maximum transfer speed in fact can carrying out transmitting, mobile switching centre 27, judge whether to transmit the data volume notified by database 11 within certain hour, and when judgement can not be transmitted within certain hour, the transmission of refusal communication data, and by this situation notice travelling carriage 16 and database 11.
On the other hand, when judging to transmit within certain hour, by the message notice database 11 of this maximum transfer speed of instruction, base station 23 and travelling carriage 16 (P33, P34, P35).
Then, when the ack signal confirming to change to maximum transfer speed being notified mobile switching centre 27 and database 11 from travelling carriage 16 (P36, P37), the same with above-mentioned example 3, mobile switching centre 27 performs the process (P38) switching communication data transfer speed.
After mobile switching centre 27 switches communication data transfer speed, communication data is sent to travelling carriage 16 (P39) with this transmission speed by database 11.
Secondly, when travelling carriage 16 transmits a large amount of data to database 11, the data sending request of the data volume comprising communication data is sent to mobile switching centre 27 and database 11 (P40, P41) by travelling carriage 16.
Then, mobile switching centre 27, with reference to being stored in the transfer rate of the travelling carriage 16 in mobile station information memory 35, confirms the state of current empty data communication channel simultaneously, thus determines the maximum transfer speed that in fact can carry out transmitting.
Then, when starting the transmission of communication data with the maximum transfer speed in fact can carrying out transmitting, mobile switching centre 27, judge whether to transmit the data volume notified by travelling carriage 16 within certain hour, and when judgement can not be transmitted within certain hour, the transmission of refusal communication data, and by this situation notice travelling carriage 16 and database 11.
On the other hand, when judging to transmit within certain hour, by the message notice database 11 of this maximum transfer speed of instruction, base station 23 and travelling carriage 16 (P42, P43, P44).
When the ack signal confirming to change to maximum transfer speed being notified mobile switching centre 27 and travelling carriage 16 from database 11 (P45, P46), the same with above-mentioned example 3, mobile switching centre 27 performs the process (P47) switching communication data transfer speed.
After mobile switching centre 27 switches communication data transfer speed, communication data is sent to database 11 (P48) with this transmission speed by travelling carriage 16.
As can be seen from the above, according to this example 4, when sending communication data from database 11 grade to travelling carriage 16 grade, databases 11 etc. need by the data volume of communication data notice mobile switching centre 27, so, mobile switching centre 27 can grasp the data volume of communication data, consequently, has and can judge whether travelling carriage 16 grade reliably can receive the effect of mass communication data when database 11 grade transmits a large amount of communication datas.
In addition, when starting the transmission of communication data with maximum transfer speed, can judge whether transmit the data volume notified by database 11 within certain hour, and when judgement can not be transmitted within certain hour, the transmission of refusal communication data, so also have the effect of the reception mistake avoiding communication data.
In this example 4, show and to transmit the situation of communication data from database 11 to travelling carriage 16 and transmit the situation of communication data from travelling carriage 16 to database 11, but when transmitting communication data when transmitting communication data from database 11 to other databases or from travelling carriage 16 to other travelling carriages, also can be suitable for, and same effect can be obtained.
Example 5
The flow chart of Figure 11 confirmation process that to be the transfer process figure of the mobile communication system representing the invention process form 5, Figure 12 be before representing handover.
Below, action is described.
In this example 5, such as, illustrate due to process when travelling carriage 16 moves to the wireless coverage area 23a of base station 23 from the overlay area 24a of base station 24 and carries out handover.
First, when sending hand-off request from travelling carriage 16 or base station 24 (step ST11), mobile switching centre 27, the electric field strength of instruction travelling carriage 16 to the electric wave launched from all base stations 23,25 adjacent with the base station 24 in current connection detects, and circulates a notice of this electric field strength (step ST12) to mobile switching centre 27.
Then, mobile switching centre 27, when receiving the electric field strength of the electric wave launched by the base station 23,25 adjoined from travelling carriage 16, this electric field strength is compared mutually, and the base station of launching the maximum electric wave of electric field strength is determined as handover-target base station (step ST13).But, for ease of illustrating, below so that base station 23 is determined as handover-target base station is described.
After decision handover-target base station, the mode setting process device 38 of mobile switching centre 27, with reference to the storage content of mobile station information memory 35, and from the empty data communication channel of the base station 23 as handover-target base station, select the data communication channel (step ST14) that can realize maximum transfer speed in the scope of the executable maximum transfer speed of travelling carriage 16.
Then, transmission speed before switching and the transmission speed after switching are compared (step ST15), when the transmission speed after switching is fast, for promptly carrying out the handover of travelling carriage 16, as shown in figure 11, before transmission speed being switched, carry out the handover (P54) of travelling carriage 16.And for the fast situation of transmission speed before switching, will be described in example 6.
According to after such as upper type carries out the handover of travelling carriage 16, the mode setting process device 38 of mobile switching centre 27, again empty data communication channel is confirmed, and press same method selected data communication channel, simultaneously by the message notice base station 23 of maximum transfer speed and travelling carriage 16 (P55, P56).
In addition, mobile switching centre 27, after by the message notice base station 23 of this maximum transfer speed and travelling carriage 16, also the time is counted for starting point with the moment that sends of this notice, and when this time arrives the speed switching time be stored in mobile station information memory 35, by switching timing message notice base station 23 and travelling carriage 16 (P58, P59).
Then, after notifying switching timing information from mobile switching centre 27, base station 23 and travelling carriage 16, start the transmission and reception (P60, P61) of communication data with the transmission speed that the information of the maximum transfer speed with previous notification is corresponding.
As can be seen from the above, according to this example 5, owing to selecting the data communication channel that can realize maximum transfer speed in the scope of the executable maximum transfer speed of travelling carriage 16 from the empty data communication channel of handover-target base station, so whenever carrying out the handover of travelling carriage 16, can obtain and make the optimized effect of the transmission speed of communication data.
In addition, transmission speed accelerates after the handover carrying out travelling carriage, before change transmission speed, carry out handover, so, the effect carrying out rapidly the handover of travelling carriage 16 can be obtained.
Example 6
In above-mentioned example 5, show the situation that transmission speed accelerates after carrying out handover, but as shown in figure 13, when after carrying out handover when transmission speed step-down, handover can be carried out after change transmission speed.
Therefore, the effect of the wireless connections disconnection that can prevent from occurring along with the handover of travelling carriage 16 can be obtained.
Example 7
Figure 14 is the transfer process figure of the mobile communication system representing the invention process form 7, Figure 15 is represent that transmitted power confirms the flow chart of process.
Below, action is described.
In above-mentioned example 5, show the situation changing transmission speed after carrying out handover immediately, but, such as, for making transmission speed double, the transmitted power of transmitter side device must be doubled (representing with decibel value, for increasing by 3 decibels), so as shown in figure 14, can after carrying out handover acknowledgment transmit power.
Such as, when carrying out the transmission and reception of communication data between travelling carriage 16 and base station 23 (step ST21), mobile switching centre 27, judges in current community just in the communications, whether have the empty data communication channel (step ST22) higher than current transmission speed.
When there is no vacant channels, this process is terminated, but when there being vacant channels (step ST23), mobile switching centre 27, by referring to mobile station information memory 35 grade judge travelling carriage 16 and database 11 whether can execution speed than current high communicate (step ST24).
Then, mobile switching centre 27, when be determined with may carry out high-speed communication time, if travelling carriage 16 is recipients, then by confirming the received power of travelling carriage 16, the transmitted power of base station 23 is confirmed, and judge whether transmitted power has enough and to spare (step ST24).
On the other hand, if base station 23 is recipients, then by confirming the received power of base station 23, the transmitted power of travelling carriage 16 is confirmed, and judge whether transmitted power has enough and to spare (step ST24).
When judging that transmitted power has enough and to spare (step ST27), mobile switching centre 27, perform the switching (step ST28) of transmission speed immediately, when judging that transmitted power does not have enough and to spare (step ST27), should improve the travelling carriage 16 (or base station 23) of the instruction notice transmit leg of transmission power level, the instruction simultaneously should circulating a notice of received power notifies the base station 23 (or travelling carriage 16) of recipient.
Thus, judge whether received power can guarantee that the enough and to spare of transmitted power can adapt to the change of transmission speed after increasing, and only when enough and to spare can be guaranteed, perform the switching of transmission speed, and when enough and to spare can not be guaranteed, the switching of transmission speed is stopped.
As can be seen from the above, according to this example 7, when the speed that the increase of transmitted power is enough to adapt to transmission speed changes, allow the change carrying out transmission speed, but when the increase of transmitted power can not adapt to the speed change of transmission speed, the invalid processing procedure still trying hard to accelerate transmission speed can be prevented, meanwhile, the communication abnormality occurred along with this invalidation process can be prevented.
Applicability in industry
As mentioned above, mobile communication system of the present invention, when setting the asymmetrical data communication channel making the transmission speed of the communication data transmitted from travelling carriage to database different from the transmission speed of the communication data transmitted from database to travelling carriage, be applicable to set up the multimedia radio communication that data volume passing in time changes.
Claims (2)
1. a communication control method, for comprising the mobile communication system of the travelling carriage in base station and this base station institute overlay area, and for controlling the radio communication of carrying out between described base station and described travelling carriage, it is characterized in that, the method comprises the following steps:
Power determining step, in order to judge the transmitted power of described base station or described travelling carriage whether have between described base station and described travelling carriage, carry out radio communication with certain transmission speed time enough and to spare that is required, transmitted power; With
Confirming step, when judging that at described power determining step described transmitted power has the enough and to spare of transmitted power, determining that described transmission speed is the effective speed of the radio communication be applicable between described base station and described travelling carriage.
2. communication control method as claimed in claim 1, it is characterized in that, the method also comprises:
Velocity estimated step, for judged whether than described transmission speed faster transmission speed can use,
When described velocity estimated step judge to have than described transmission speed faster transmission speed can use, and when described power determining step judges that described transmitted power has an enough and to spare of transmitted power, in described confirmation step, determine that described transmission speed is the effective speed of the radio communication be applicable between described base station and described travelling carriage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB971817162A CN1134126C (en) | 1997-12-10 | 1997-12-10 | Mobile communication system |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101161110A Division CN1244243C (en) | 1997-12-10 | 1997-12-10 | Base station, mobile statino and communication controller for controlling commkunication between them |
| CNB971817162A Division CN1134126C (en) | 1997-12-10 | 1997-12-10 | Mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1722644A CN1722644A (en) | 2006-01-18 |
| CN1722644B true CN1722644B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971817162A Expired - Lifetime CN1134126C (en) | 1997-12-10 | 1997-12-10 | Mobile communication system |
| CN200510089482.3A Expired - Lifetime CN1722644B (en) | 1997-12-10 | 1997-12-10 | Communication control method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971817162A Expired - Lifetime CN1134126C (en) | 1997-12-10 | 1997-12-10 | Mobile communication system |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN1134126C (en) |
| HK (1) | HK1085859A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10334838B4 (en) * | 2003-07-30 | 2005-06-16 | Infineon Technologies Ag | Transceiver assembly and method for bi-directionally transmitting data over a digital interface in a radio |
| GB2480489B (en) * | 2010-05-20 | 2012-10-10 | Ratcliff Palfinger Ltd | Tail lift for a vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116475A (en) * | 1993-11-22 | 1996-02-07 | 夸尔柯姆股份有限公司 | Communication process in a radio telephone system |
| CN1124075A (en) * | 1994-01-11 | 1996-06-05 | 艾利森·Ge·流动通讯有限公司 | A cellular/satellite communications system with improved frequency re-use |
| EP0795969A2 (en) * | 1996-03-15 | 1997-09-17 | Matsushita Electric Industrial Co., Ltd. | CDMA cellular radio transmission system |
-
1997
- 1997-12-10 CN CNB971817162A patent/CN1134126C/en not_active Expired - Lifetime
- 1997-12-10 CN CN200510089482.3A patent/CN1722644B/en not_active Expired - Lifetime
-
2006
- 2006-05-19 HK HK06105814.7A patent/HK1085859A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116475A (en) * | 1993-11-22 | 1996-02-07 | 夸尔柯姆股份有限公司 | Communication process in a radio telephone system |
| CN1124075A (en) * | 1994-01-11 | 1996-06-05 | 艾利森·Ge·流动通讯有限公司 | A cellular/satellite communications system with improved frequency re-use |
| EP0795969A2 (en) * | 1996-03-15 | 1997-09-17 | Matsushita Electric Industrial Co., Ltd. | CDMA cellular radio transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1245603A (en) | 2000-02-23 |
| CN1134126C (en) | 2004-01-07 |
| CN1722644A (en) | 2006-01-18 |
| HK1085859A1 (en) | 2006-09-01 |
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