CN1080956C - TDMA communication system - Google Patents

TDMA communication system Download PDF

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Publication number
CN1080956C
CN1080956C CN96112717A CN96112717A CN1080956C CN 1080956 C CN1080956 C CN 1080956C CN 96112717 A CN96112717 A CN 96112717A CN 96112717 A CN96112717 A CN 96112717A CN 1080956 C CN1080956 C CN 1080956C
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China
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terminal
switch
mentioned
signal
antenna
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CN1157508A (en
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川添雄彦
沟口匡人
久保田周治
服部武
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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2646—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for broadband transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

In a TDMA communication system, a number of time slots used for communication is increased with no increase of transmitters and receivers, and further high rate transmission is also provided. Transmission and reception are carried out simultaneously in each time slot with different frequencies. The bandwidths for transmission and reception are independently variable, and the carrier frequency for transmission and the carrier frequency for reception are variable, the carrier frequency for a time slot for reception is used also for the carrier frequency for a time slot for transmission spaced therefrom by a predetermined time spacing.

Description

Time division multiple access communication mode and device
The present invention relates to tdma communication mode and device.
In the PHS mode (Personal Handy Phone System " RCR STD-28); use TDMA-TDD communication mode (one time-division of time division multiple access letter in reply mode: carry out transceiver by time divided channel, and uplink and downgoing line are the communication mode of same carrier frequency).It is 5msec that the TDMA-TDD communication mode of PHS mode is got basic frame, cuts apart 8 time slots, distributes 4 time slots in the downgoing line (base station → terminal), distributes 4 time slots in the uplink (terminal → base station), and signal velocity is 384kbps.
The time slot configuration of the TDMA-TDD communication mode in the PHS mode is illustrated in Fig. 1, this TDMA-TDD communication mode is taken as the transmission carrier frequency of the transmission carrier frequency of base station and terminal identical, can be suitable for thus to improve because the transmission diversity that the terminal receiving quality that the delay ripple of fading channel produces worsens (" the ground surface error that sends diversity in the TDMA/TDD load mode improves effect ", the 1992 Spring Meeting B-304 of electronic intelligence Communications Society).This transmission diversity is all condition mutually with the carrier frequency that uses in the transmitting-receiving, and terminal one side needn't have a plurality of antennas, carries out with the switching of the transmitting antenna of its station one side, and is therefore very effective aspect the miniaturization of terminal, paper power consumptionization.
TDMA-TDD communication mode in the PHS mode uses each 4 time slot of transmitting-receiving as shown in Figure 1 in the communicating by letter of base station and terminal room.Fig. 1 illustrates the example that terminal a, b, c, d communicate with the base station simultaneously.Among the figure, time slot 1,2,3,4 is used for being used for from the base station to the communication of each terminal a, b, c, d to the communication time slot 5,6,7,8 of base station from each terminal a, b, c, d.In the PHS mode, the base station is identical when receiving and dispatching with the frequency that certain terminal room uses, and separates 4 time slots (2.5msec) from the base station to the sending time slots of certain terminal and the sending time slots of this terminal.In the system of the use PHS of reality mode.In 4 time slots, the time slot of 1 time slot as transceiver base station and the common control signal of using of each terminal room, thereby can be simultaneously and the number of terminals of certain base station conversation be 3, and at this in order to conclusively show out feature of the present invention and different with conventional art, so illustrate whole 4 situations that time slot all uses between base station and terminal.
The zone that traffic is concentrated requires to communicate with 1 base station and more terminal.So the transmitting-receiving processing unit adopts the mode of distributing different frequency respectively with 2 circuit.
Fig. 2 is illustrated in and gets base station and terminal room transmitting-receiving time slot in this mode in the past is 8, the example that terminal a, b, c, d, e, f, g, h and base station communicate simultaneously.Carrier frequency f is used in communicating by letter of terminal a, b, c, d and base station 1, carrier frequency f is used in communicating by letter of terminal e, f, g, h and base station 2
Fig. 3 illustrates the base station circuitry structure when using this mode in the past.Because the base station sends and receives with different carrier frequency simultaneously, so transmitting-receiving processing unit (T 1, T 2, R 1, R 2) 2 circuit are respectively arranged, switch transmitting-receiving by switch SW.A represents antenna.
On the other hand, when using the tdma communication mode, the timeslot number that is used to communicate by letter in the basic frame of TDMA is more than the TDMA-FDD communication mode (time division multiple access-frequency division letter in reply mode: time divided channel carries out transceiver, and changes the communication mode of the carrier frequency that uses in uplink and the downgoing line) of TDMA-TDD mode in addition.Use this TDMA-FDD communication mode in the digital automobile telephone system (RCR STD-27A).
Fig. 4 illustrates the example when having used the TDMA-FDD communication mode.In this embodiment, the same with the PHS mode, getting the basic frame of TDMA is 5msec, cuts apart 8 time slots.In downgoing line (base station → terminal), distribute 8 time slots, in uplink (terminal → base station), distribute 8 time slots.The carrier frequency that is taken at the uplink use in the manner is different carrier frequency with the carrier frequency that uses at downgoing line.Be taken at the carrier frequency that uplink uses among Fig. 4 and be f 1, the carrier frequency that uses at downgoing line is f 2
Fig. 5 illustrates the structure of the wireless machine when having used the TDMA-FDD communication mode.A illustrates antenna, and D is an antenna multicoupler, and T is that transmission processing unit, R receive processing unit.Owing in the TDMA-FDD communication mode, send simultaneously and receive, so use the wireless shared device that is shown among the figure, because fixed the frequency band that in the transmission of antenna multicoupler, allows and receive in the frequency band that allows, therefore can not be applicable in the conventional art to send and receive the PHS mode of using same carrier frequency etc.
As previously discussed, in the PHS mode,, needed to use a plurality of reception processing units, so the increase of base station hardware size becomes problem for increasing by 1 number of terminals of communicating by letter simultaneously in the base station in the past.
On the other hand, the individual who grows up from cordless telephone at PHS etc. carries the communication system, it is treating the application to the multimedia data communication that is conceived to transmit amount of capacity, as 1 example, for satisfy its expectation, in PHS standardization the aggregate channel of 32kbps (time division multiplexing) transmit, use the 64kbps of 2 time slots to transmit and also carrying out standardization.And when requiring more high speed, even monopolize the capacity that uses 1 carrier frequency to use 4 time slots but also only can guarantee 32kbps * 4=128kbps under with the situation of present frame format.Under this speed, can not guarantee transmission capacity as ISDN base unit (2B+D=144kbps), the individual carries the utilization of communication system to the multimedia communication aspect and is very limited, thereby strong row ground wishes to utilize the frame format of PHS to realize that the ISDN base unit transmits the method for capacity.
So, when the objective of the invention is to increase by 1 base station and accommodate number of terminals accordingly, realize that data guarantee that the ISDN basic interface transmits capacity high-speed data transfers such as (144kbps) in transmitting.
One of tdma communication method of the present invention be characterised in that " in the tdma communication method; (1) be included in the occasion that sends simultaneously and receive with different carrier waves in each time slot; (2) make receive employed frequency band and send employed frequency band variable; (3) make the carrier wave of the carrier wave of receiving slot and sending time slots variable, the carrier wave that uses in (4) above-mentioned receiving slot is provided with the time difference and uses in above-mentioned sending time slots.
The present invention can coexist with TDMA-TDD mode (as the PHS mode) in the past.In existing PHS mode, separate above-mentioned receiving slot and sending time slots by per 4 time slots on the time, needn't send simultaneously and receive.Yet, accommodate number of terminals and high-speed data communication accordingly for 1 base station of increase of realizing the object of the invention, need send simultaneously and receive, increase used time slot.The method that for this reason, need have above-mentioned (1)～(3).Also have, need have the method for above-mentioned (4) that in being provided with the time slot of time difference, sending and receive with identical carrier frequency in order to realize coexisting with existing PHS mode.
Fig. 1 is the time slot graph of a relation of the TDMA-TDD communication mode in the PHS mode.
Fig. 2 be in the past in the mode (TDMA-TDD mode) to get timeslot number be 8 schematic diagram.
Fig. 3 is the base station circuitry structure of mode (TDMA-TDD mode) in the past.
Fig. 4 is that to get timeslot number in the mode (TDMA-FDD mode) be 8 schematic diagram in the past.
Fig. 5 is the base station circuitry structure of mode (TDMA-TDD mode) in the past.
Fig. 6 is that to get timeslot number in the mode of institute's motion be 8 schematic diagram.
Fig. 7 A is based on base station circuitry structure of the present invention.
Fig. 7 B has been suitable for the architecture of base station example that sends diversity.
Fig. 8 is the characteristic example of antenna multicoupler.
Fig. 9 is the waveform of switching signal.
Figure 10 is based on other structure example of antenna multicoupler of the present invention.
Figure 11 is based on a structure example again of antenna multicoupler of the present invention.
Figure 12 is based on the another structure example of antenna multicoupler of the present invention.
Figure 13 is the time slot configuration example when having set high-speed channel (192kbps) according to the present invention.
Figure 14 is the time slot configuration figure the when circuit of Figure 13 is used as the ISDN basic interface.
Figure 15 is the asynchronous time slot configuration example of transfer rate in uplink and downgoing line.
The working of an invention form
＜embodiment 1 〉
Present embodiment be illustrated in send processing unit in the base station of PHS mode and receive processing unit each only to use 1 circuit to get the communication terminal number simultaneously be 8 example.Fig. 6 is illustrated in base station and the time slot of terminal room setting and the accompanying drawing of used carrier frequency.The time slot of getting the transmitting-receiving of base station and terminal room be shown be 8, the base station simultaneously and the example that communicates of terminal a, b, c, d, e, f, g, h.In the PHS mode also and in the prior art narration like that, the base station is identical in transmitting-receiving with the carrier frequency that certain terminal room uses, in mode in the past shown in Figure 2 from the base station to the downgoing line of terminal with to the uplink of base station, distribute 2 different carrier frequency simultaneously from terminal, and the carrier frequency that sends simultaneously in the present embodiment or receive respectively is 1.In the example of Fig. 6, in the 1st time slot 1, with carrier frequency f 3Carry out from the transmission of terminal, with carrier frequency f to the base station 3Carry out from the base station to the transmission of terminal.
Terminal sends and receives timing and separate 4 time slots (2.5msec) with the same in the past, owing to there is no need transceiver simultaneously, therefore can make terminal miniaturization, low power consumption.
Also have, in mode in the past shown in Figure 2, accommodate accordingly need increase when number of terminals is 8 terminals and send processing unit and receive processing unit getting 1 base station, on the contrary, do not send processing unit and receive processing unit owing to do not need in the present embodiment to increase, therefore can make base station miniaturization, low power consumption.
The carrier frequency that uses in the receiving slot in the present embodiment uses in being provided with the sending time slots of certain slot time.Among Fig. 6, among the terminal a the 1st time slot 1 as sending time slots, the 5th time slot 5 that 4 slot times are set from this sending time slots as receiving slot, is all used f 7Carrier frequency communicate.Get the transmission frequency of terminal and the identical TDD mode of transmission frequency of base station by being suitable among the present invention, can be suitable for and improve because the transmission diversity that the terminal receiving quality that the delay ripple of fading channel produces worsens.
Fig. 7 A illustrates the circuit structure that has used the tdma communication device when of the present invention.The tdma communication device has 2 antenna multicoupler (D for sending and receive simultaneously 1, D 2), according to the shared device of switching signal (cont) switched antenna.That is, the frequency band that allows in not having that the conventional art shown in the image pattern 4 is fixing like that and sending and receive in the frequency band that allows.Here, use have allow frequency band in the transmission and receive in allow frequency band to use to have 2 antenna multicouplers of characteristic as shown in Figure 8, switch in the antenna multicoupler that each time slot of communicating uses and carry out transceiver.Antenna multicoupler D 1Permission is from f 1To f 5As sending carrier frequency, allow from f 6To f 10As receiving carrier frequency.Antenna multicoupler D 2Permission is from f 1To f 5As receiving carrier frequency, from f 6To f 10As sending carrier frequency.In this circuit, realize that the switching signal when Fig. 6 time slot is set is shown in Fig. 9.Use antenna multicoupler D in the time slot 1～4 1, use antenna multicoupler D in the time slot 5～8 2
Send processing unit T in the example of Fig. 6, at 8 time slots with frequency f 3, f 1, f 1, f 1, f 7, f 7, f 7, f 9The signal of 8 passages of output.The 2nd switch SW2 is connected to the 1st antenna multicoupler D to the output that sends processing unit T at 4 time slots of beginning 1, the output that sends processing unit T is connected to the 2nd antenna multicoupler D at the time slot of following 5～8 2The 1st switch SW1 is owing to select the 1st antenna multicoupler D in time slot 1～4 1Therefore from antenna A transmitting carrier frequency f 3, f 1, owing in time slot 5～8, select the 2nd antenna multicoupler D 2So transmitting carrier frequency f 7, f 9
Also identical about receiving processing.In time slot 1～4, select the 1st antenna multicoupler D 1, carrier frequency f 7, f 9Be applied in the input that receives processing unit R via the 3rd switch SW3, in time slot 5～8, select the 2nd antenna multicoupler D 2, carrier frequency f 3, f 1Be applied in the input that receives processing unit R via the 3rd switch SW3.
Among Fig. 7 A, calling antenna multicoupler cells D P with antenna multicoupler 1 and 2, switch 1,2 and 3 that chain-dotted line enclosed.Antenna multicoupler cells D P receives transmission signal t from sending processing unit T, received signal is supplied with received processing unit R.Also import the control signal C of each switch in addition.
Fig. 7 B is the structure example that is suitable for base station when sending diversity in the base station with tdma communication device.Among Fig. 7 B, 2 antenna multicoupler cells D P are set 1, DP 2
The received signal r of each antenna multicoupler unit is applied to each and receives processing unit R 1, R 2Carry out the mensuration of received signal quality here, according to the quality of having measured, control switching circuit (SWCONT) control receives selector (SEL) and sends switch (SW), want the good side's of selective reception signal quality reception processing unit about received signal, will select and the selected identical antenna multicoupler unit of received signal for the carrier frequency of each time slot about sending signal.The mensuration of received signal quality is carried out according to incoming level, the error rate etc. with well-known technology.
TDMA control circuit (TDMA CONT) is the circuit of knowing, and carries out the tdma slot signal to the supply that sends processing unit, from receiving the reception of processing unit, and the switch control signal (CONT) of generation and slot synchronization.
Figure 10 is to use the circuit structure example of antenna multicoupler of the present invention unit, is situation about realizing with 1 antenna multicoupler, is as good as with Fig. 7 A on the function.Switch in by f with 4 switch arrays from antenna multicoupler D 1To f 5The terminal A input of CF signal send the transmission signal that processing unit takes place, the f that exports from terminal B 6To f 10CF signal be input to the state that receives processing unit and a signal is input to terminal B and the signal from terminal A output is input to the state that receives processing unit sending.Be among Fig. 9 during the time slot 1 to 44 switchs be connected to terminal 1 one sides, f 1To f 5As sending frequency band, f 6To f 10As frequency acceptance band.4 switchs are connected to terminal 2 one sides, f during the time slot 5 to 8 1To f 5As frequency acceptance band, f 6To f 10As sending frequency band.Yet, in this structure owing to send and receive distribution one side terminal of the shared device of common antenna, so will satisfy the desired selecting frequency characteristic of transceiver simultaneously.(common antenna multicoupler decision transmitter side, receiver side, the out-of-band attenuation of receiver side increases, and inserts in the transmitter side frequency band to lose to reduce to wait to come into one's own).
Figure 11 is to use the circuit structure example of antenna multicoupler of the present invention unit, is illustrated in the circuit structure of Figure 10 and Fig. 7 A because switch turn-offs the side leakage power to cause improvement example when isolation between the transmitting-receiving carrier frequency is insufficient.When for example in the structure of Fig. 7 A, selecting antenna multicoupler 1.The frequency that sends signal is f 1To f 5Some, send signal and connect and be sent out to antenna, but the leakage that sends signal is also arranged as terminal 2 one sides of cutting off the switch 1 that connects from the terminal 1 of switch 1.In the general switch of level employed microwave section in mobile communication of general this leakage power attenuation ratio be-20dB about.The passband side terminal of transmission signal by antenna multicoupler 2 that leaks into the terminal 2 of switch 1 appears on the terminal 2 of switch 3.Though the terminal 2 of switch 3 is to cut off the state that connects, but owing in receiving processing unit, be carried out input about still with attenuation ratio-20dB, so send the decay that signal is subjected to the cut-out connection of switch 1 and 3, and be imported in the receiving element with the level about a 40dB of transmitted power, himself be that the level that sends the unwanted signal of signal can not obtained the isolation between the transmitting-receiving carrier frequency when not satisfying the receiving element desirable characteristics according to the circuit structure of Figure 11.
The circuit structure of Figure 11 is to be inserted into antenna multicoupler D being positioned at the band pass filter and the transmit amplifier change position that send the processing unit output in the circuit structure of Fig. 7 A 1, D 2And 2 positions between the switch 2, be inserted into antenna multicoupler D being positioned at the reception amplifier and the band pass filter change position that receive the processing unit input among Fig. 7 A 1, D 2And the circuit structure of 2 positions between the switch 3.By circuit structure that adopts Figure 11 and the power supply that on/off is controlled transmit amplifier and reception amplifier in each switch of control, can turn-off the leakage paths that cuts off useless ripple according to amplifier power supply.Amplifier has when power connection and gives fixed gain, and gain is 0 when power remove.For example, in the structure of Fig. 7 A, selected antenna multicoupler D 1The time, the transmission signal that leaks into the terminal 2 of switch 1 passes through antenna multicoupler D 2The passband side terminal is imported into the terminal 2 of switch 3.And in the structure of Figure 11 because the power remove of reception amplifier Rx2, therefore be imported into receive processing unit useless and self send signal level and be suppressed on/off with reception amplifier than suitable degree.
Circuit structure when Figure 12 is to use circulator C to replace the switch SW of Figure 11.Circulator C for example has 3 terminals of terminal 1 to 3, be have from the signal of terminal 1 input from terminal 2 outputs, from the signal of terminal 2 inputs from terminal 3 outputs, the device of the signal of importing from terminal 3 from terminal 1 output function.So, as shown in figure 12, connect with f 1To f 5Frequency pool (frequency band fA) be that the band pass filter of passband replaces among Figure 11 the antenna multicoupler D as the output link of transmit amplifier TX1 1Terminal A, connect with f 6To f 10Frequency pool (frequency band f B) be the antenna multicoupler D of the band pass filter replacement of passband as the output link of transmit amplifier B 2Terminal B, the output of two side's band pass filters is connected to the terminal 1 of circulator C.Also have, the terminal 2 of circulator C connects antenna A.Thus, after the output signal of transmission processing unit is amplified by transmit amplifier Tx1 that selects with switching signal or Tx2, by band pass filter, from terminal 1 input of circulator C.Launch from antenna A.On the other hand, the signal that receiver side uses antenna A to receive from terminal 3 outputs of circulator C among Figure 12, and connect with f on the terminal 3 of circulator C 1To f 5Carrier frequency group (frequency band f A) be the band pass filter of passband and with f 6To f 10Carrier frequency group (frequency band f B) be that the band pass filter of passband replaces the antenna multicoupler 2 among Figure 11, and be connected with the input terminal of reception amplifier Rx1 and Rx2 respectively.Thus, select frequency band f from the signal of antenna input by switching signal AWith frequency band f BIn non-transmission frequency band as frequency acceptance band and after amplifying, be input to the reception processing unit.
Figure 13 is the time slot configuration example during according to setting high-speed channel of the present invention, at per 1 time slot 32kbps, realize with 6 time slots in the legend of 192kbps, use time slot 2,4,5,6,7,8 these 6 time slots from terminal to the transmission of base station, time slot 1,2,3,4,6,8 these 6 time slots are used in the transmission from the base station to terminal.Use f from terminal to each time slot of the upward signal of base station 7, f 9, f 3, f 1, f 1, f 1Totally 4 kinds of carrier frequency, each time slot from the base station to the downstream signal of terminal uses f 3, f 1, f 1, f 1, f 7, f 94 kinds of identical carrier frequency, so the base sends employed carrier frequency and all is contained in terminal and sends among the employed carrier frequency.Thus, can be suitable for the transmission diversity in the base station.
When on the other hand, 3 kinds of carrier frequency of a part send downstream signals in employed 4 kinds of carrier frequency in the upward signal (with f 3, f 1, f 1, f 1, f 7, f 7Order send), also can be suitable for the transmission diversity.Like this, be provided with the time difference can use to the downstream signal that terminal sends from the base station from terminal to the employed multiple carrier frequency of upward signal of base station partly or entirely.
In the IA High Speed Channel untapped time slot can with the terminal coexistence of PHS mode in the past, the time slot that sends and receive 4 time slots ( time slot 1 and 5,3 and 7) that only stagger.
Time slot configuration example when Figure 14 illustrates the circuit of Figure 13 used as the ISDN basic interface, 2 time slots are corresponding to B 1, other 2 time slots are corresponding to B 2, other 1 time slot is corresponding to D.
The base station sends the also use in the base station receives of employed carrier frequency in this case, can be suitable for the transmission diversity.
Figure 15 is the asynchronous time slot configuration example of uplink and downgoing line transfer rate, distributes 2 time slots from terminal to the communication of base station, distributes 6 time slots to the communication of terminal from the base station.Other time slot is as the time slot that uses in the communication of PHS mode in the past, sends and receive only to separate 4 time slots (time slot 4 and 8).
When carrying out sending to data communication such as device from the terminal link information, consider in uplink, to use and instruct the very sufficient situation of low capacity circuit such as transmission a lot of to the information delivery device, and it is a lot of to transmit the situation of the Large Volume Data that takes out from the information delivery device in the downgoing line.Time slot configuration example during different asymmetric transmission of the transmission capacity of such uplink and downgoing line of illustrating.
＜embodiment 2 〉
The Broadband PCS Band Plan of the U.S. (IEEE Per Sonal Communica-tions pp.36-43, fourth quarter.1994.Vol.1 No.4) in, be 1850MHz the frequency band that needs PCS (the Personal Communication Services) usefulness of licence to 1910MHz and 1930MHz to the 1990MHz formulation.So, can consider full range band from 1850MHz to 1910MHz or a part as the frequency band that transmission allowed of antenna multicoupler 1 among the embodiment 1 and the frequency band that reception allowed of antenna multicoupler 2,1930MHz is suitable for the present invention to whole frequency bands of 1990MHz or a part as the frequency band that transmission allowed of the frequency band that reception allowed of antenna multicoupler 1 among the embodiment 1 and antenna multicoupler 2.
＜embodiment 3 〉
The 1895MHz that the 1850MHz of embodiment 2 uses in the frequency band of 1910MHz and the Japanese PHS is to the band overlap of 1918MHz.So, 1895MHz in the U.S. is suitable for existing PHS mode and begins service in 1910MHz, considers also to utilize 1895MHz to have the method for the wireless machine of circuit of the present invention to the frequency band of 1910MHz and other frequency band and the use of Broadland PCS Band then.This method is easy to make the country of existing PHS mode beyond Japan to popularize, and then can also effectively utilize the frequency band that uses in the existing PHS mode.
In tdma communication mode of the present invention and the device, send employed carrier frequency, can not set up the transmitting-receiving processing unit and just make the time slot increase that is used to carry out radio communication by sending and receive and in reception, also can use with same time slot.Its result has increasing accommodating of per 1 base station and realizes that data guarantee that the IS-DN basic interface transmits the effect of the high-speed data transfer of capacity (144kbps) etc. in transmitting in the number of terminals.

Claims (8)

1.TDMA communication means in this tdma communication method, is characterised in that:
(1) is included in the situation that each time slot sends simultaneously and receives with different carrier waves;
(2) make reception used band and transmission used band variable;
(3) make the carrier frequency of the carrier frequency of receiving slot and sending time slots variable;
(4) be set the time difference, in above-mentioned sending time slots, use the carrier frequency that uses in the above-mentioned receiving slot.
2. the tdma communication method recorded and narrated of claim 1 is characterised in that:
Communicate in base station and terminal room, the base station is behind the upward signal that has received from above-mentioned terminal, separate the downstream signal of time difference transmission to above-mentioned terminal, partly or entirely in above-mentioned downstream signal, using of employed one or more carrier frequency of above-mentioned upward signal as employed carrier frequency, and, above-mentioned base station
(1) receives above-mentioned upward signal with a plurality of antennas;
(2) mensuration is via the received field strength or the received signal quality of each received signal of this each antenna;
(3) selective reception provide the antenna of the highest said determination result's above-mentioned upward signal;
(4) via the above-mentioned downstream signal of this antenna transmission.
3.TDMA communicator in the tdma communication device that uses the tdma communication mode, is characterised in that:
Have
(1) dispensing device that is used to send at each time slot and the receiving system that is used to receive that carries out work simultaneously at each time slot and described dispensing device;
(2) make reception used band and the variable device of transmission used band;
(3) make the carrier frequency of receiving slot and the variable device of carrier frequency of sending time slots; And, the time difference is set in above-mentioned sending time slots, use the carrier frequency that uses in the above-mentioned receiving slot.
4, tdma communication device in the tdma communication device that uses the tdma communication mode, is characterised in that:
Have
(1) dispensing device that is used to send at each time slot and the receiving system that is used to receive that carries out work simultaneously at each time slot and described dispensing device;
(2) make reception used band and the variable device of transmission used band;
(3) the variable device of carrier frequency that makes the carrier frequency of receiving slot and ask when sending; And then the base station with above-mentioned tdma communication device also has
(4) with the device of a plurality of antennas receptions from the upward signal of terminal with above-mentioned TDMA device;
(5) measure the received field strength of this each received signal or the device of received signal quality;
(6) selective reception provide the device of antenna of the highest said determination result's above-mentioned upward signal;
(7) separate the time difference behind the above-mentioned upward signal of reception, via the device of above-mentioned selected antenna transmission to the downstream signal of above-mentioned terminal transmission.
5. the tdma communication devices recorded and narrated of claim 3 or 4 are characterised in that:
Have the 1st and the 2nd antenna multicoupler, select side's antenna multicoupler to be connected to the 1st switch of antenna, the output that sends processing unit is connected to above-mentioned 2 antenna multicoupler one sides' the 2nd switch, the input of reception processing unit is connected to above-mentioned 2 antenna multicoupler one sides' the 3rd switch.Reception is used to switch the terminal of the switching signal of above-mentioned each switch.
6. the tdma communication devices recorded and narrated of claim 3 or 4 are characterised in that:
Have
When being connected, also include the terminal A of the signal that is added into side's frequency band and the antenna multicoupler of the terminal B of the signal that is added into the opposing party's frequency band with antenna;
Be inserted in the switch battle array between this antenna multicoupler and transmission processing unit and the reception processing unit;
This switch battle array have switch the signal be input to above-mentioned terminal A or from the 1st switch of the signal of terminal A output, switch the signal that is input to terminal B or from the 3rd switch of the signal of terminal B output, the output that sends processing unit is connected to the 1st or the 3rd switch one side's the 2nd switch, the input that receives processing unit is connected to the 1st or the 3rd switch one side's the 4th switch, receives the terminal of the switching signal of switching each switch.
7, claim 3 or the 4 tdma communication devices of recording and narrating are characterised in that:
Have
The the 1st and the 2nd antenna multicoupler, selection one side's antenna multicoupler connect the 1st switch of antenna, 2nd switch of the output that sends processing unit to the 1st terminal (1) or the 2nd terminal (2) output, the 3rd switch of the input of selective reception processing unit from 2 inputs;
Be connected to the 1st band pass filter that the 1st passband (fA) is arranged of the 1st terminal (1) of the 2nd switch, the output of this filter be connected to the 1st transmit amplifier on the 1st terminal (A) of the 1st antenna multicoupler;
Be connected to the 2nd band pass filter that the 2nd passband (fB) is arranged of the 2nd terminal (2) of the 2nd switch, the output of this filter be connected to the 2nd transmit amplifier on the 2nd terminal (B) of the 2nd antenna multicoupler;
Amplify the 1st antenna multicoupler the 2nd terminal (B) signal the 1st reception amplifier, be connected to its output and the 3rd band pass filter of the 2nd passband (fB) arranged;
Amplify the 2nd reception amplifier of signal of the 1st terminal (A) of the 2nd antenna multicoupler, be connected to its output and the 4th band pass filter of the 1st passband (fA) is arranged;
The output of the 3rd and the 4th band pass filter is connected to the device of the 1st and the 2nd terminal of the 3rd switch;
Receive the terminal of the switching signal of switching above-mentioned each switch, each transmit amplifier and each reception amplifier;
And, control and make that the 1st and the 2nd transmit amplifier the opposing party's when a side has gain gain is 0, make that the 1st and the 2nd reception amplifier the opposing party's when a side has gain gain is 0.
8. the tdma communication device recorded and narrated of claim 7 is characterised in that:
The action of above-mentioned the 1st switch is undertaken by circulator, and each action of the above-mentioned the 1st and the 2nd antenna multicoupler is undertaken by band pass filter with the 1st passband (fA) and the combination with band pass filter of the 2nd passband (fB).
CN96112717A 1995-10-06 1996-10-04 TDMA communication system Expired - Fee Related CN1080956C (en)

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JP60296/96 1996-02-23
JP6029696 1996-02-23

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GB2306083A (en) 1997-04-23
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HK1008765A1 (en) 1999-05-14
CN1157508A (en) 1997-08-20

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