CN101826909A - Communication system, communication apparatus and communication control method - Google Patents
Communication system, communication apparatus and communication control method Download PDFInfo
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- CN101826909A CN101826909A CN200910266388A CN200910266388A CN101826909A CN 101826909 A CN101826909 A CN 101826909A CN 200910266388 A CN200910266388 A CN 200910266388A CN 200910266388 A CN200910266388 A CN 200910266388A CN 101826909 A CN101826909 A CN 101826909A
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Abstract
The invention provides a communication system, a communication apparatus and a communication control method, wherein, a wireless base station (1) receives a plurality of a plurality of a plurality of signals transmitted from wireless terminals (2A-2D), the wireless base station (1) measures received delay times of a plurality of signals, and under the condition that the measured delay time exceeds the preset admissible time, the wireless base station can transmit the delay notices representing the delays generated in the signal to one of a wireless terminal as a transmitting source of the delayed signals and a wireless terminal as a transmitting source for transmitting the signals by the next slot time of the slot utilized during transmitting by the delayed signals. One of the wireless terminals (2A-2D) for receiving the delay notices can enable the transmitting speed of the signal transmitted by the time slot to be increased, thereby preventing the deterioration of the communication quality of the signal received in the communication apparatus.
Description
Technical field
The present invention relates to a kind of have first communicator and a plurality of second communication device and utilization cut apart a plurality of time slots (time slot) behind the call duration time band between first communicator and a plurality of second communication device, carry out communication system that signal transmits, the communicator in this communication system, and this communication system in communication control method.
Background technology
In the wireless communication system that communicates by time division duplex (TDD) and time-division multiple access (TDMA) between a plurality of wireless terminals and wireless base station, each wireless terminal is different according to wireless terminal with distance between the wireless base station.Thus, distribute different time slots irrelevant,, exist the wireless base station can receive the situation of burst signal (burst signal) simultaneously from each wireless terminal owing to the different transmission delays that take place of distance with giving each wireless terminal.
Receive when preventing this burst signal (conflict), for example in patent documentation 1 and patent documentation 2 in the technology of record, the control signal that the wireless base station is used to avoid a conflict to each wireless terminal transmission.Each wireless terminal is based on the delivery time of the mandatory adjustment burst signal of the control signal that receives.This control is called as " regularly adjusting control (time alignment control) ".[patent documentation 1] TOHKEMY 2001-169343 communique [patent documentation 2] TOHKEMY 2002-77087 communique
But,,, also exist the time location (receive window) of the burst signal that receives by the wireless base station to depart from the situation at the rear of output time slot even then carry out above-mentioned timing adjustment control if wireless terminal moves to the distant place from neighbouring relative to the wireless base station.
Thus, under the situation of the burst signal that extremely postpone the time of reception in having the wireless base station, signal conflict taking place, is difficult to carry out normal demodulation.That is communication quality deterioration.
Particularly, the wireless communication system of PHS (Personal Handy Phone System) is owing to be prerequisite with the base station configuration in Microcell design (plot planning), so the above-mentioned signal conflict of easy generation when increasing along with the variable in distance of Microcellization between wireless terminal and wireless base station.
Summary of the invention
Point in view of the above problems, the object of the invention are to provide a kind of communication system, communicator and communication control method of deterioration of the communication quality that prevents the signal that receives in communicator.
In order to solve above-mentioned problem, the present invention has following feature.At first, its aim of first side of the present invention is a kind of communication system (wireless communication system 10), this communication system has first communicator (wireless base station 1) and a plurality of second communication device (wireless terminal 2A～2D), and utilize a plurality of time slots cut apart behind the call duration time band between described first communicator and described a plurality of second communication device, to carry out the signal transmission, wherein, described first communicator possesses: signal receiving part (signal Return Reception Dept. 152), and it receives the signal that utilizes described time slot to send by described a plurality of second communication devices; Delay time measurement portion (delay time measurement portion 154), it measures the time of delay of the described signal that is received by described signal receiving part; With notice of delay sending part (notice of delay sends handling part 162), it surpassed under the situation of allowed time in the described time of delay of being measured by described delay time measurement portion, the notice of delay of the described signal delay of expression is sent to as the second communication device of described time of delay above the transmission source of the signal of described allowed time, and in the described second communication device in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay one of them, the wherein said allowed time is the maximum delay time of time location in described time slots band of described signal; Described second communication device possesses: notice of delay acceptance division (notice of delay Return Reception Dept. 252), and it receives the described notice of delay from described first communicator; With transfer rate increase portion (transfer rate increase portion 256), it is being received under the situation of the described notice of delay by described notice of delay acceptance division, and the transfer rate of the described signal that utilizes described time slot transmission is increased.
In this communication system, from maximum delay time in the time slots band of the time location that surpasses this signal time of delay of the signal of second communication device, be under the situation of allowed time, first communicator is in view of the possibility height of the communication quality deterioration of signal, to the second communication device in the transmission source of this signal, and as the transmission that utilizes this signal in the second communication device transmission lag notice in transmission source of the signal that transmits of next time slot of the time slot that utilized.On the other hand, received at the second communication device under the situation of the notice of delay, the transfer rate of the signal that utilizes the time slot transmission is increased.Transfer rate by signal increases, thereby shortens the delivery time of signal.As a result, signal conflict can be prevented, and then the deterioration of communication quality can be prevented.
Its aim of second side of the present invention is a kind of communicator (wireless base station 1), this communicator utilization cut apart behind the call duration time band a plurality of time slots and a plurality of other communicators (transmit signal between the wireless terminal 2A～2D), this communicator possesses: signal receiving part (signal Return Reception Dept. 152), and it receives the signal that utilizes described time slot to transmit by described a plurality of other communicators; Delay time measurement portion (delay time measurement portion 154), it measures the time of delay of the described signal that is received by described signal receiving part; With notice of delay sending part (notice of delay sends handling part 162), it surpassed under the situation of allowed time in the described time of delay of being measured by described delay time measurement portion, the notice of delay of expression signal delay is sent to as described time of delay of described other communicators above the transmission source of the signal of described allowed time, and in described other communicators in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay one of them, the wherein said allowed time is the maximum time of time location in described time slots band of described signal.
This communicator, from maximum delay time in described time slots band of the time location that surpasses this signal time of delay of the signal of other communicators, be under the situation of allowed time, in view of the possibility height of the communication quality deterioration of signal, to other communicator transmission lags notices.Thus, received at other communicators under the situation of the notice of delay, the transfer rate of signal is increased.Transfer rate by signal increases, thereby shortens the delivery time of this signal.As a result, signal conflict can be prevented, and then the deterioration of communication quality can be prevented.
Its aim of the 3rd side of the present invention is, described notice of delay sending part sends the described notice of delay that comprises the described time of delay of being measured by described delay time measurement portion.
Thus, send the notice of delay that comprises time of delay by communicator to other communicators, thereby other communicators are according to setting suitable transfer rate this time of delay.
Its aim of the 4th side of the present invention is, described communicator also possesses frequency bandwidth expansion section (frequency band expansion section 158), this frequency bandwidth expansion section surpassed under the situation of described allowed time in the described time of delay of being measured by described delay time measurement portion, enlarged to be used for the frequency bandwidth that signal transmits; Described notice of delay sending part sends the described notice of delay that comprises by the frequency bandwidth after the expansion of described frequency bandwidth expansion section.
Thus, communicator is used for frequency bandwidth and the frequency bandwidth after other communicators are notified this expansion that signal transmits by surpassing in time of delay to enlarge under the situation of allowed time, thereby other communicators can enlarge the frequency bandwidth that is used for the signal transmission and transfer rate is increased.
Its aim of the 5th side of the present invention is, described communicator also possesses the many-valued several increase of modulation portion (modulate many-valued several increase portion 160), this is modulated many-valued several increase portion and surpasses under the situation of described allowed time in the described time of delay of being measured by described delay time measurement portion, makes the many-valued number of modulation that is used for the modulation system that signal sends increase; Described notice of delay sending part sends the described notice of delay that comprises the many-valued number of modulation after being increased by the many-valued several increase of described modulation portion.
Thus, the modulation many-valued number of communicator by the modulation system that is used in signal under surpassing the situation of allowed time in time of delay and transmits increases and the many-valued number of modulation after other communicators are notified this increases, increases and makes the transfer rate increase thereby other communicators can be used in the many-valued number of modulation of the modulation system that signal sends.
Its aim of the 6th side of the present invention is that described communicator also possesses collision detection portion (collision detection portion 156), and the described signals from collision that is received by described signal receiving part detects in this collision detection portion; Described notice of delay portion surpassed the described allowed time and is detected under the situation of described signals from collision by described collision detection portion in the described time of delay of being measured by described delay time measurement portion, sent the described notice of delay.
Even surpass the allowed time time of delay of signal, only otherwise the deterioration that signal conflict just can not produce communication quality takes place.Thus, communicator is by only surpassing permissible range and detect under the situation of signal conflict to other communicator transmission lags notices in time of delay of signal, thereby only under the situation that the communication quality deterioration has taken place, transfer rate is increased, and alleviate the processing burden in these other communicators.
Its aim of heptalateral face of the present invention is a kind of communicator (wireless terminal 2A～2D), this communicator utilization cut apart behind the call duration time band a plurality of time slots and other communicators (wireless base station 1) between transmit signal, this communicator possesses: signal transmission unit (signal sends handling part 252), and it utilizes described time slot to send signal to described other communicators; Notice of delay acceptance division (notice of delay Return Reception Dept. 254), the maximum delay time of the time location that surpasses described signal in described other communicators the time of delay of the signal that it receives in described time slots band, be under the situation of allowed time, receive the notice of delay of the expression signal delay that sends from described other communicators; With transfer rate increase portion (transfer rate increase portion 256), it is being received under the situation of the described notice of delay by described notice of delay acceptance division, and the transfer rate of the described signal that utilizes described time slot transmission is increased.
This communicator in the transmission destination address of signal, be in other communicators, the maximum delay time of the time location that surpasses this signal in time of delay of signal in the time slots band, be under the situation of allowed time, the transfer rate of signal is increased.Transfer rate by signal increases, thereby shortens the delivery time of this signal.As a result, signal conflict can be prevented, and then the deterioration of communication quality can be prevented.
Its aim of the 8th side of the present invention is that the described notice of delay comprises described time of delay, and the described time of delay that is included in the described notice of delay is long more, all the more fast described transfer rate of then described transfer rate increase portion.
This communicator according to the transmission destination address of signal, be time of delay of this signal in other communicators suitable transfer rate to be set.
Its aim of the 9th side of the present invention is that next time slot of the time slot that described signal transmission unit is utilized sends under the situation of described signal in the transmission that utilizes the signal that surpasses the described allowed time described time of delay, make to send to begin to postpone.
Communicator next time slot by the time slot that utilized in the transmission that utilizes the signal that surpasses the allowed time time of delay transmits to make to send under the situation of signal and begins to postpone, thereby can prevent conflicting between this communicator signal that sends and the signal that takes place to postpone, and then can prevent the deterioration of communication quality.
It will be intended to the tenth side of the present invention, and the described notice of delay comprises and be used for the frequency bandwidth that signal transmits, and described transfer rate increase portion will be used for the frequency bandwidth that described signal sends and be set at the frequency bandwidth that is included in the described notice of delay.
Its aim of the 11 side of the present invention is, the described notice of delay comprises the many-valued number of modulation that is used for the modulation system that signal transmits, and the many-valued number of modulation that described transfer rate increase portion will be used for the transmission of described signal is set at the many-valued number of the modulation that is included in the described notice of delay.
Its aim of the tenth two side faces of the present invention is a kind of communication control method, this communication control method is to have first communicator and a plurality of second communication device and utilizing a plurality of time slots after having cut apart the call duration time band to carry out communication control method in the communication system that signal transmits between described first communicator and described a plurality of second communication device, and this communication control method comprises: described first communicator receives the step of being utilized the signal of described time slot transmission by described a plurality of second communication devices; The step of the time of delay of the described signal that the described first communicator measurement receives; Described first communicator surpassed under the situation of allowed time in the described time of delay of measuring, the notice of delay of expression signal delay is sent to as the described second communication device of described time of delay above the transmission source of the signal of described allowed time, and one of them the step in the described second communication device in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay, the wherein said allowed time is the maximum delay time of time location in described time slots band of described signal; Described second communication device receives the step from the described notice of delay of described first communicator; Receiving under the situation of the described notice of delay with described second communication device, making the step of the transfer rate increase of the described signal that utilizes described time slot transmission.
According to the present invention, can prevent the deterioration of the communication quality of the signal that in communicator, receives.
Description of drawings
Fig. 1 is the whole schematic configuration diagram of the relevant wireless communication system of embodiment of the present invention.Fig. 2 is the figure of the structure of the relevant frame of expression embodiment of the present invention.Fig. 3 is the schematic configuration diagram of the relevant wireless base station of embodiment of the present invention.Fig. 4 is the functional block structure chart of the control part in the relevant wireless base station of embodiment of the present invention.Fig. 5 is the schematic configuration diagram of the relevant wireless terminal of embodiment of the present invention.Fig. 6 relates to the reception of the wireless communication part in the relevant wireless terminal of embodiment of the present invention and the structure chart of transmission.Fig. 7 is the functional block structure chart of the control part in the relevant wireless terminal of embodiment of the present invention.Fig. 8 is the flow chart of the action of the wireless base station among the first relevant embodiment of expression embodiment of the present invention.Fig. 9 is the figure of the structure of the relevant reception data of expression embodiment of the present invention.Figure 10 is the figure of an example of the relevant carrier frequency distribution of expression embodiment of the present invention.Figure 11 is the flow chart of the action of the wireless terminal among the first relevant embodiment of expression embodiment of the present invention.Figure 12 is the figure of first example of the relevant transfer rate increase of expression embodiment of the present invention.Figure 13 is the figure of second example of the relevant transfer rate increase of expression embodiment of the present invention.Figure 14 is the flow chart of the action of the wireless base station among the second relevant embodiment of expression embodiment of the present invention.Figure 15 is the flow chart of the action of the wireless terminal among the second relevant embodiment of expression embodiment of the present invention.
Symbol description: 1-wireless base station, 2A～2C-wireless terminal, 3-sub-district, the 10-wireless communication system, 102-control part, 103-storage part, 104-wire communication portion, 106-antenna, 108-RX portion, the 110-demodulation section, 112-lsb decoder, 114-encoding section, the 116-modulation portion, 118-TX portion, 152-signal Return Reception Dept., 154-delay time measurement portion, 156-collision detection portion, 158-frequency band expansion section, 160-modulates many-valued several increase portion, and the 162-notice of delay sends handling part, 202-control part, the 203-storage part, 206-wireless communication part, 208-antenna, the 210-monitor, 212-microphone, 214-loud speaker, the 216-operating portion, 222-RF frequency mixer, 224-switch, the 226-IF filter, 228-IF filter, 230-IF frequency mixer, the 232-IF frequency mixer, 234-switch, 236-IF filter, the 238-IF filter, the 240-RF frequency mixer, the 252-signal sends handling part, 254-notice of delay Return Reception Dept., 256-transfer rate increase portion.
Embodiment
Then, with reference to accompanying drawing embodiments of the present invention are described.Specifically, structure, action, (3) effect and the effect of (2) wireless base station, (4) other execution modes to (1) wireless communication system describe.In the accompanying drawing record in the following embodiments, to identical or the additional identical or similar symbol of similar portions.
(1) structure of wireless communication system at first, for the structure of the relevant wireless communication system of embodiment of the present invention, illustrate successively according to the order of the structure of the structure of the whole schematic construction of (1.1) wireless communication system, (1.2) wireless base station, (1.3) wireless terminal.
(1.1) whole schematic construction Fig. 1 of wireless communication system is the whole schematic configuration diagram of the relevant wireless communication system 10 of embodiment of the present invention.
As shown in Figure 1, wireless communication system 10 is PHS wireless communication systems.This wireless communication system 10 comprises: wireless base station 1, wireless terminal 2A, wireless terminal 2B, wireless terminal 2C and wireless terminal 2D.In Fig. 1, wireless terminal 2A～2D is in sub-district 3 coverages that wireless base station 1 provides.Wireless base station 1 communicates by time division duplex and time-division multiple access with wireless terminal 2A～2D.
Fig. 2 is the figure of expression frame structure.As shown in Figure 2, frame by: be used for the downgoing time band of down direction (1 direction) communication with then this downgoing time band and be used for the last line time band formation that up direction (from the direction of wireless terminal 2A～2D to wireless base station 1) communicate by letter to wireless terminal 2A～2D from the wireless base station, the downgoing time band is split into 4 descending time slot D1～D4, and last line time band is split into ascending time slot U1～U4.
Under initial condition, wireless terminal 2A allocation of downlink time slot D1 and ascending time slot U1 are given in wireless base station 1, give wireless terminal 2B allocation of downlink time slot D2 and ascending time slot U2.In addition, wireless terminal 2C allocation of downlink time slot D3 and ascending time slot U3 are given in wireless base station 1, give wireless terminal 2D allocation of downlink time slot D4 and ascending time slot U4.Wireless terminal 2A～2D utilizes the signal of the descending time slot reception of distribution from wireless base station 1, utilizes the ascending time slot that distributes to send signal to wireless base station 1.
And have, below, assumed wireless base station 1 and wireless terminal 2A～2D are the transmission of carrying out voice signal, utilize the amount of the voice data that each time slot transmits to fix.
(1.2) structure of wireless base station then illustrates successively for the structure of wireless base station 1 order according to the detailed structure of the schematic construction of (1.2.1) wireless base station, (1.2.2) wireless base station.
(1.2.1) schematic construction Fig. 3 of wireless base station is the schematic configuration diagram of wireless base station 1.As shown in Figure 3, wireless base station 1 comprises: control part 102, storage part 103, wire communication portion 104, antenna 106, wireless receiving portion (RX portion) 108, demodulation section 110, lsb decoder 112, encoding section 114, modulation portion 116, and wireless transmission part (TX) 118.
The transmission data of encoding section 114 input control parts 102 outputs.And 114 pairs of encoding section send data and encode, and export the signal that obtains to modulation portion 116.Modulation portion 116 is utilized the signal of the modulation system modulation input of regulation, to 118 outputs of TX portion.TX portion 118 sends the signal of input to wireless terminal 2A～2D via antenna 106.
(1.2.2) detailed structure of wireless base station then describes the detailed structure of wireless base station 1, and specifically the functional block structure to control part 102 describes.Fig. 4 is the functional block structure chart of the control part 102 of wireless base station 1.
As shown in Figure 4, control part 102 comprises: the many-valued several increase of signal Return Reception Dept. 152, delay time measurement section 154, collision detection portion 156, frequency bandwidth expansion section 158, modulation portion 160, and the notice of delay send handling part 162.
Signal Return Reception Dept. 152 input respectively receives data from lsb decoder 112.Delay time measurement portion 154 according to measuring time of delay from each signal that receives the corresponding wireless terminal 2A～2D of data with each.
The maximum delay time of the time location that has surpassed respective signal in time of delay in the time of ascending time slot band, be under the situation of allowed time, in other words, depart from the time location of signal under the situation at rear of time band of ascending time slot, conflicting between the signal (next transmits signal) that transmits with next time slot that utilizes this time slot to depart from the ascending time slot that is utilized in the transmission of inhibit signal detected for this signal (time slot departs from inhibit signal) by collision detection portion 156.
Depart from inhibit signal and transmit under the situation of conflicting between signal with next detecting time slot by collision detection portion 156, frequency bandwidth expansion section 158 enlarges and is used for the frequency bandwidth that signal transmits.And then, the frequency bandwidth after the frequency bandwidth when frequency bandwidth expansion section 158 will receive in RX portion 108 and depart from the transmission source of inhibit signal or next and transmit the signal in transmission source of signal from time slot changes to expansion.
Perhaps, depart from inhibit signal and transmit under the situation of conflicting between signal with next detecting time slot by collision detection portion 156, modulating the many-valued number of modulation that many-valued several increase portion 160 is used in the modulation system that signal transmits increases.And then, modulate the demodulation mode of many-valued several increase portion 160 when in modulation portion 110, demodulation being departed from the signal in the transmission source of inhibit signal or the transmission source that next transmits signal from time slot change to increase after the paired demodulation mode of the pairing modulation system of the many-valued number of modulation.
Under the situation that has enlarged the frequency bandwidth that is used for the signal transmission by frequency bandwidth expansion section 158, the notice of delay sends handling part 162 and generates the notices of delay, and wherein this notice of delay comprises: the information of the frequency bandwidth after the expansion, the information of time of delay and the identifying information of wireless terminal that departs from the transmission source of inhibit signal as time slot are unique word (unique word) (aftermentioned).And then, the notice of delay sends handling part 162 and will depart from one of them among the wireless terminal 2A～2D in transmission source of inhibit signal or transmit among the wireless terminal 2A～2D in transmission source of signal one of them as next and specify as sending destination address as time slot, the notice of delay that generates to encoding section 114 outputs.
On the other hand, increasing under the situation of the many-valued number of modulation that is used for the modulation system that signal transmits by modulating many-valued several increase portion 160, the notice of delay sends handling part 162 and generates the notices of delay, and wherein this notice of delay comprises: the information of the many-valued number of modulation after the increase, the information of time of delay and depart from the unique word of wireless terminal in the transmission source of inhibit signal as time slot.And then, the notice of delay send handling part 162 will as time slot depart from one of them among the wireless terminal 2A～2D in transmission source of inhibit signal or the wireless terminal 2A～2D in the transmission source of the signal that transmits as next ascending time slot that utilizes time slot to depart from the ascending time slot that is utilized in the transmission of inhibit signal in one of them specify as sending destination address the notice of delay that generates to encoding section 114 outputs.
The data of 114 pairs of notices of delay of encoding section are encoded.116 pairs of signals that obtained by coding of modulation portion are modulated.TX portion 118 utilizes sending signal after the modulation as one of them descending time slot that distributes among the wireless terminal 2A～2D of the transmission destination address in specified transmission source via antenna 106.
(1.3) structure of wireless terminal then illustrates successively to the structure of the wireless terminal 2A～2D order according to the detailed structure of the schematic construction of (1.3.1) wireless terminal, (1.3.2) wireless terminal.
(1.3.1) schematic construction Fig. 5 of wireless terminal is the schematic configuration diagram of wireless terminal 2A.As shown in Figure 5, wireless terminal 2A comprises: control part 202, storage part 203, wireless communication part 206, antenna 208, monitor 210, microphone 212, loud speaker 214, and operating portion 216.And have, wireless terminal 2B～2D is the structure identical with wireless terminal 2A.
Monitor 210 shows the image that receives via control part 202, perhaps display operation content (input telephone number or address etc.).212 pairs of sound of microphone collect sound, export the voice data of the sound that arrives based on the collection sound to control part 202.Loud speaker 214 is based on the voice data output sound of obtaining from control part 102.
Fig. 6 (a) is the figure of the relevant function of the reception of expression wireless communication part 206.As shown in Figure 6, wireless communication part 206 comprises: RF frequency mixer 222, switch 224, IF filter 226, IF filter 228, and IF frequency mixer 230.
IF filter 226 filtering in the 300kHz frequency band.On the other hand, IF filter 228 filtering in the 900kHz frequency band.And communication process portion 206 can replace IF filter 226 and 228 and comprise the IF filter that sample frequency is variable.
IF frequency mixer 230 mixes output signal or the output signal of IF filter 228 and the local signal (local oscillation signal) of IF of IF filter 226, exports second intermediate-freuqncy signal.
Fig. 6 (b) is the figure of the relevant structure of the transmission of expression wireless communication part 206.As shown in Figure 6, wireless communication part 206 comprises: IF frequency mixer 232, switch 234, IF filter 236, IF filter 238, and RF frequency mixer 240.
IF frequency mixer 232 mixes first intermediate-freuqncy signal of modulation portion (not shown) input in the wireless communication part 206 and the local signal (local oscillation signal) of IF, exports second intermediate-freuqncy signal.Switch 234 moves by the control of control part 202 described later, switches will outputing to the situation of IF filter 236 from second intermediate-freuqncy signal of IF frequency mixer 232 output and output between the situation of IF filter 238.
IF filter 236 filtering in the 300kHz frequency band.On the other hand, IF filter 238 filtering in the 900kHz frequency band.And with above-mentioned same, communication process portion 206 can replace IF filter 236 and 238 and comprise the IF filter that sample frequency is variable.
(1.3.2) detailed structure of wireless terminal then describes the detailed structure of wireless terminal 2A, specifically, the functional block structure of control part 202 is described.Fig. 7 is the functional block structure chart of the control part 202 of wireless terminal 2A.And the control part 202 of wireless terminal 2B～2D is structures identical with the control part 202 of wireless terminal 2A.
As shown in Figure 7, control part 202 comprises: signal sends handling part 252, notice of delay Return Reception Dept. 254, reaches transfer rate increase portion 256.
Signal sends handling part 252 and utilizes the ascending time slot of distributing to from wireless terminal, carries out sending Signal Processing to wireless base station 1.Specifically, signal sends handling part 252 and distributing to the data that should send to wireless communication part 206 outputs in the ascending time slot time of wireless terminal band.Wireless communication part 206 is encoded during data in input, the mixing of modulation, carrier signal, sends to wireless base station 1 via antenna 208.
Notice of delay Return Reception Dept. 254 utilizes the descending time slot of distributing to from wireless terminal, receives the processing of 1 notice of delay that sends from the wireless base station.Specifically, notice of delay Return Reception Dept. 254 is being distributed in the time of the descending time slot of wireless terminal band, and input is from the notice of delay of wireless communication part 206 outputs.
Transfer rate increase portion 256 increases the transfer rate of the signal in the ascending time slot.Specifically, transfer rate increase portion 256 extract the information of the frequency bandwidth after the expansion that is included in the notice of delay or increase after the information and the unique word of the many-valued number of modulation.
After the information of the frequency bandwidth after extracting expansion, the information of the frequency bandwidth after transfer rate increase portion 256 enlarges based on this, the frequency bandwidth after in wireless communication part 206, will being used for frequency bandwidth that the signal of ascending time slot transmits and changing to expansion.At this moment, transfer rate increase portion 256 makes the switch 224 in the wireless communication part 206 be connected with IF filter 228 sides, and switch 234 is connected with IF filter 238 sides.
On the other hand, after the information of the many-valued number of modulation after extracting increase, the information of the many-valued number of modulation after transfer rate increase portion 256 increases based on this, the many-valued number of modulation after the many-valued number of modulation that will be used for the modulation system that the signal of ascending time slot transmits in wireless communication part 206 changes to increase.
In addition, transfer rate increase portion 256 judges that whether the unique word that extracts is the unique word from wireless terminal.At the unique word that extracts is not under the situation of the unique word of wireless terminal, from wireless terminal be next ascending time slot of utilizing time slot to depart from the ascending time slot that is utilized in the transmission of inhibit signal transmit next transmit the transmission source of signal.At this moment, transfer rate increase portion 256 makes thereafter to utilize and distributes to beginning when the ascending time slot of wireless terminal sends signal and make than common delay.
(2) action of wireless communication system then describes the action of wireless communication system 10.And have, below hypothesis transmits for the signal of ascending time slot under initial condition, utilizes the frequency bandwidth of 300kHz band and utilizes the modulation system of π/4 phase shift QPSK.Below, second embodiment that change is used for the many-valued number of modulation of the modulation system that first embodiment of the frequency bandwidth that the signal of ascending time slot transmits and signal that change is used for ascending time slot transmit describes.
(2.1) first embodiment Fig. 8 are flow charts of the action of the wireless base station 1 among expression first embodiment.
In step S101, wireless base station 1 receives the signal that utilizes ascending time slot to transmit from wireless terminal 2A～2D.Thereafter, control part 102 is from the lsb decoder 112 inputs reception data corresponding with this signal.And then control part 102 according to measuring time of delay from each signal that receives the corresponding wireless terminal 2A～2D of data with each.
Specifically, control part 102 detects and is included in the time location that receives the unique word (UW) in the data.Time location for example is by foremost constantly being to represent time of benchmark with ascending time slot.
Fig. 9 is the figure that expression receives the structure of data.Reception data shown in Figure 6 have the bit long of 240 bits.These reception data are by constituting with the opening flag (SS) of ramping time (R), 2 bit long, the preamble (PR) of 6 bit long, the unique word (UW) of 16 bit long, the information of 180 bit long, the CRC (CyclicRedundancy Check) of 16 bit long, the protection (guard) of 16 bit long from beginning to be followed successively by the indicial response of 4 bit long foremost.
And the time difference between the time location of the detected unique word of control part 102 measurements and the time location of the unique word under the undelayed situation of predetermined signal is used as time of delay.The information of the time location of the unique word under the not delay situation of signal for example is stored in the storage part 103.
In step S102, control part 102 is judged maximum delay time in the time of ascending time slot band of the time location that whether surpasses respective signal time of delay measured, is the allowed time.The information of allowed time for example is stored in the storage part 103.
Surpassed in time of delay under the situation of allowed time, promptly, the time location of signal departs under the situation at rear of time band of ascending time slot, in step S103, control part 102 judge surpass the allowed time this time of delay signal (time slot departs from inhibit signal) whether with utilize this time slot to depart from the signal (next transmits signal) that next ascending time slot that inhibit signal transmits the ascending time slot that is utilized transmits to conflict.
Specifically, control part 102 calculates to be included in to depart from the time location of the unique data (unique data) in the corresponding reception data of inhibit signal with time slot and be included in next and transmits time difference between the time location of the unique data in the corresponding reception data of signal.And then control part 102 judges that whether the time difference that calculates is less than the stipulated time.At this, it is poor with the minimum time that next transmission signal does not conflict that the so-called stipulated time is that time slot departs from inhibit signal.The information of this stipulated time for example is stored in the storage part 103.
Under the situation of time difference less than the stipulated time, promptly, time slot departs under the situation of inhibit signal and next transmission signal conflict, in step S104, control part 102 control RX portions 108 set change from the frequency bandwidth of 300kHz band to the frequency bandwidth of 900kHz band to the frequency bandwidth (upstream band width) that the signal that is used for ascending time slot transmits.
Figure 10 is the frequency bandwidth of expression by 300kHz and the figure of the distribution of the carrier frequency used of the frequency bandwidth of 900kHz.As shown in figure 10, as the frequency bandwidth of 300kHz, can use from 1893.6MHz to 1919.4MHz.On the other hand, as the frequency bandwidth of 900kHz, can use the scope from 1879.8MHz to 1893.6MHz wideer than the frequency bandwidth of 300kHz.Thus, the state that can avoid the frequency bandwidth of the frequency bandwidth of 300kHz band and 900kHz band to mix, thereby by distributing the wide like this frequency bandwidth of 900kHz band can avoid taking place group delay after the channel allocation to the 300kHz band.Therefore, can successfully carry out from the expansion of the frequency bandwidth of 300kHz to the frequency bandwidth of the frequency bandwidth of 900kHz.
Then, returning Fig. 8 goes on to say.In step S105, control part 102 generates the notice of delay, and wherein this notice of delay comprises: the information of the frequency bandwidth after the expansion; The information of time of delay; With with unique word in time slot departs from corresponding reception data time of delay, in other words, depart from the unique word of wireless terminal in the transmission source of inhibit signal as time slot.And then, control part 102 will depart from one of them among the wireless terminal 2A～2D in transmission source of inhibit signal or transmits among the wireless terminal 2A～2D in transmission source of signal one of them as next and specify as sending destination address as time slot, the notice of delay that generates to encoding section 114 outputs.Thereafter, wireless base station 1 utilizes one of them descending time slot that distributes among the wireless terminal 2A～2D that sends destination address is sent and the corresponding signal of notice time of delay.
On the other hand, in step S102, be judged as time of delay under the situation below the allowed time, or in step S103, be judged as under the situation that signal conflict does not take place, control part 102 maintains the upstream band width frequency bandwidth of 300kHz band in step S106.
Figure 11 is expression receives the action of the wireless terminal of 1 notice of delay that sends from the wireless base station by an action shown in Figure 8 flow chart.
In step S201, the signal corresponding that one of them reception among wireless terminal 2A～2D utilizes descending time slot to transmit with the notice of delay.Thereafter, control part 202 is from the wireless communication part 206 inputs notice of delay corresponding with this signal.
In step S202, control part 202 attempts being included in the extraction of the information of the frequency bandwidth after the expansion in the notice of delay.At this, owing to contain the information of the frequency bandwidth after the expansion in the notice of delay, so control part 202 can extract the information of the frequency bandwidth after this expansion.Under the situation of the information of the frequency bandwidth after extracting expansion, can control part 202 is judged enlarge the upstream band width.For example, the switch 234 in communication process portion 206 has been connected under the situation of IF filter 238 sides, more than this, can not enlarge the upstream band width.At this moment, control part 202 is judged as and can not enlarges the upstream band width.
Under the situation that can enlarge the upstream band width, in step S203, control part 202 makes the switch 224 in the communication process portion 206 be connected IF filter 228 sides, and makes switch 234 be connected IF filter 238 sides.Thus, the linking objective address switches to the IF filter 228 of 900kHz band from the IF filter 226 of 300kHz band, and switches to the IF filter 238 of 900kHz band from the IF filter 236 of 300kHz band.And the IF filter 238 of 900kHz band carries out signals sampling, enlarges the frequency bandwidth of the signal transmission that is used for ascending time slot.And then, utilize the transfer rate of the signal of ascending time slot to increase.
In step S205, control part 202 extracts the unique word that is included in the notice of delay.And then control part 202 judges that whether the unique word that extracts is the unique word from wireless terminal.
At the unique word that extracts is under the situation of the unique word of wireless terminal, and the signal that utilizes ascending time slot to send from wireless terminal becomes time slot and departs from inhibit signal in wireless base station 1.At this moment, in step S207, one of them signal that utilizes the frequency bandwidth after enlarging to carry out in the ascending time slot that receives among the wireless terminal 2A～2D of the notice of delay sends.As a result, utilized the transfer rate of the signal of ascending time slot to increase.
For example, in Figure 12 (a), in wireless base station 1, be used to the rear that the time location (receive window #1) of the signal that transmits from the ascending time slot U1 of wireless terminal 2A departs from the time band of ascending time slot U1.Promptly, in wireless base station 1, from surpassing time of delay of the signal of wireless terminal 2A the allowed time.In addition, receive window # 1 repeats with the time location (receive window #2) of the signal that is used to transmit from the ascending time slot U2 of wireless terminal 2B.Promptly, in wireless base station 1 from the signal of wireless terminal 2A and signal conflict from wireless terminal 2B.
At this moment, wireless terminal 2A enlarges the frequency bandwidth of the signal transmission that is used for ascending time slot U1.Thus, utilized the transfer rate of the signal of this ascending time slot U1 to increase.As above-mentioned, between wireless base station 1 and wireless terminal 2A, utilize time slot to carry out the transmission of voice signal, utilize the amount of the voice data of a time slot transmission to fix.Thus, the transfer rate of the signal by having utilized ascending time slot U1 increases, and shown in Figure 12 (b), shortens the receive window # 1 that utilizes the signal that this ascending time slot U1 transmits.Promptly, shorten the delivery time of the signal that utilizes ascending time slot U1 transmission.As a result, in wireless base station 1, can prevent, and then can prevent the deterioration of communication quality from the signal of wireless terminal 2A and signals from collision from wireless terminal 2B.
On the other hand, in step S205, not under the situation of the unique word of wireless terminal being judged as the unique word that extracts, the signal that utilizes ascending time slot to send from wireless terminal becomes next and transmits signal in wireless base station 1.At this moment, in step S206, control part 202 makes the transmission of the signal that utilizes ascending time slot begin to postpone.Specifically, control part 202 makes the moment ratio delay usually to the data output of encoding section 114.At this moment, the time of delay that is included in the notice of delay is long more, and control part 202 makes output time postpone more.
Thereafter, in step S207, one of them that has received among the wireless terminal 2A～2D of the notice of delay utilizes frequency bandwidth after enlarging to carry out the signal of ascending time slot in the moment that the transmission that postpones begins.As a result, utilized the transfer rate of the signal of ascending time slot to increase.
For example, same with Figure 12 (a) in Figure 13 (a), receive window # 1 departs from the rear of the time band of ascending time slot U1 in wireless base station 1.Promptly, in wireless base station 1 from having surpassed time of delay of the signal of wireless terminal 2A the allowed time.In addition, receive window # 1 and receive window # 2 repeat.Promptly, in wireless base station 1 from the signal of wireless terminal 2A and signal conflict from wireless base station 2B.
At this moment, wireless terminal 2B enlarges the frequency bandwidth of the signal transmission that is used for ascending time slot U2.Thus, utilized the transfer rate of the signal of this ascending time slot U2 to increase.In addition, wireless terminal 2B begins than common delay the transmission of the signal that has utilized ascending time slot.Utilized the transfer rate of signal of ascending time slot U2 and the transmission that postpones this signal to begin by increase, shown in Figure 13 (b), thereby shortened the receive window # 2 that utilizes the signal that this ascending time slot U2 transmits, and receive window # 2 move on to the rear foremost.Promptly, shorten the delivery time utilize the signal that ascending time slot U2 transmits and move to the rear.As a result, in wireless base station 1, can prevent, and then can prevent the deterioration of communication quality from the signal of wireless terminal 2A and signals from collision from wireless terminal 2B.
In addition, under the upstream band width can not condition of enlarged, the switch 224 that control part 202 maintains in the communication process portion 206 in step S204 was connected the state of IF filter 226 sides and the state that switch 234 is connected IF filter 236 sides in step S202.At this moment, in step S207, the signal that utilizes the frequency bandwidth that does not enlarge to carry out ascending time slot sends.
(2.2) second embodiment Figure 14 are flow charts of the action of the wireless base station 1 among expression second embodiment.Because the action of the step S101～step S103 among the action of the step S301～step S303 among Figure 14 and Fig. 8 is identical, so this illustrates omission.
In step S303, time slot departs from inhibit signal and next transmits under the situation of signal conflict being judged as, in step S304, the many-valued number of modulation that control part 102 is used in the modulation system that the signal of ascending time slot transmits increases, and will be used for the modulation system (up adjustment mode) that the signal of ascending time slot transmits and be set at 16QAM.At this, be that to utilize the modulation system of initial condition be 2 times of transfer rate under π/4 phase shift QPSK situations utilizing transfer rate under the 16QAM situation.
In step S305, control part 102 generates the notice of delay, and wherein this notice of delay comprises: the information of the many-valued number of modulation after the increase; The information of time of delay; With with unique word in time slot departs from the corresponding reception data of inhibit signal, in other words, depart from the unique word of wireless terminal in the transmission source of inhibit signal as time slot.And then, control part 102 will depart from one of them among the wireless terminal 2A～2D in transmission source of inhibit signal or transmits among the wireless terminal 2A～2D in transmission source of signal one of them as next and specify as sending destination address as time slot, the notice of delay that generates to encoding section 114 outputs.Thereafter, wireless base station 1 utilizes one of them descending time slot that distributes to being appointed as among the wireless terminal 2A～2D that sends destination address to send the signal corresponding with the notice of delay.
On the other hand, in step S302, be judged as time of delay under the situation below the allowed time, or in step S303, be judged as under the situation that signal conflict does not take place, control part 102 maintains π/4 phase shift QPSK with up modulation system in step S306.
Figure 15 is expression receives the action of the wireless terminal of 1 notice of delay that sends from the wireless base station by an action shown in Figure 14 flow chart.
In step S401, the signal corresponding that utilizes descending time slot to transmit as one of them reception among the wireless terminal 2A～2D of the transmission destination address of the notice of delay with the notice of delay.Thereafter, control part 202 is from the wireless communication part 206 inputs notice of delay corresponding with this signal.
In step S402, control part 202 attempts being included in the extraction of the information of the many-valued number of modulation after the increase in the notice of delay.At this, owing to contain the information of the many-valued number of modulation after the increase in the notice of delay, so control part 202 can extract the information of the many-valued number of modulation after this increase.Under the situation of the many-valued number of modulation after extracting increase, control part 202 judges whether to increase the many-valued number of modulation (the many-valued number of up modulation) of up modulation system.For example, be under the situation of 16QAM in up modulation system, more than this, the many-valued number of up modulation is increased.At this moment, control part 202 is judged as can not increase the many-valued number of up modulation.
Increasing under the situation of the many-valued number of up modulation, in step S403, control part 202 makes the many-valued number of modulation after the many-valued number of modulation is increased to increase included in the notice of delay, and up modulation system is set at 16QAM.Thus, the many-valued number of the modulation of modulation system increases, and then has utilized the transfer rate of the signal of ascending time slot to increase.
In step S405, control part 202 extracts included unique word in the notice of delay.And then control part 202 judges that whether the unique word that extracts is the unique word from wireless terminal.
At the unique word that extracts is under the situation of the unique word of wireless terminal, and the signal that utilizes ascending time slot to send from wireless terminal becomes time slot and departs from inhibit signal in wireless base station 1.At this moment, in step S407, received among the wireless terminal 2A～2D of the notice of delay one of them utilize with increase after the corresponding modulation systems of the many-valued number of modulation, be the signal transmission that 16QAM carries out ascending time slot.
Thus, utilized the transfer rate of the signal of ascending time slot to increase.As above-mentioned, carry out the transmission of voice signal, utilize the amount of the voice data of a time slot transmission to fix.Therefore, the delivery time of signal shortens when transfer rate increases.As a result, in wireless base station 1, can prevent from time slot depart from inhibit signal the transmission source wireless terminal signal and transmit conflict between the signal of wireless terminal in transmission source of signal from next, and then can prevent the deterioration of communication quality.
On the other hand, in step S405, not under the situation of the unique word of wireless terminal being judged as the unique word that extracts, the signal that utilizes ascending time slot to send from wireless terminal becomes next and transmits signal in wireless base station 1.At this moment, in step S406, control part 202 makes the transmission of the signal that utilizes ascending time slot begin to postpone.Thereafter, in step S407, received among the wireless terminal 2A～2D of the notice of delay one of them the transmission that postpones utilize the zero hour with increase after the corresponding modulation system of the many-valued number of modulation, be the signal transmission that 16QAM carries out ascending time slot.
Thus, utilized the transfer rate of the signal of ascending time slot to increase, the delivery time shortens and moves on to the rear.As a result, in wireless base station 1, can prevent from conflicting between the signal of the signal of the wireless terminal in the transmission source of time slot offset signal and the wireless terminal in the transmission source of transmitting signal from next, and then can prevent the deterioration of communication quality.
In addition, be judged as in step S402 under the situation that can not increase the many-valued number of up modulation, control part 202 maintains π/4 phase shift QPSK with up modulation system in step S404.Among step S407s, utilize the modulation system kept, be that the signal that π/4 phase shift QPSK carry out ascending time slot sends thereafter.
(3) effect with effect in the relevant wireless communication system 10 of embodiments of the present invention, surpass under the situation of allowed time in the time of delay of the signal of one of them transmission that utilizes ascending time slot from wireless terminal 2A～2D, wireless base station 1 is in view of the possibility height of signal communication quality deterioration, one of them in the wireless terminal 2A～2D in the transmission source of this signal, and the wireless terminal 2A～2D in the transmission source of the signal that transmits as next ascending time slot that utilizes this signal to transmit the ascending time slot that is utilized in one of them transmission lag notice.Contain the information of the frequency bandwidth after the expansion in the notice of delay or increase after the information of the many-valued number of modulation.
On the other hand, received one of them among the wireless terminal 2A～2D of the notice of delay, according to the information of the frequency bandwidth after the expansion included in this notice of delay, being used in the frequency bandwidth that the signal of ascending time slot transmits increases.Perhaps, received one of them among the wireless terminal 2A～2D of the notice of delay, according to the information of the many-valued number of modulation after the increase included in this notice of delay, the many-valued number of modulation that is used in the modulation system that the signal of ascending time slot transmits increases.Thus, utilized the transfer rate of the signal of ascending time slot to increase, the delivery time of signal shortens.And then, can prevent signal conflict, can prevent the deterioration of communication quality.
This wireless base station 1 transmission lag notice in addition, has only taken place in wireless base station 1 under the situation of signal conflict.Promptly, only in wireless base station 1 under the situation of the communication quality deterioration of signal, transfer rate is increased, can alleviate the processing burden in this wireless terminal.
In addition, one of them in having received the wireless terminal 2A～2D of the notice of delay is under the situation in next transmission source of transmitting signal, and the transmission of signal is begun than common delay.Thus, conflicting between the signal that can prevent to have received one of them transmission among the wireless terminal 2A～2D of this notice of delay and the signal that takes place to postpone, and then can prevent the deterioration of communication quality.
(4) other execution modes such as above-mentioned, though the present invention according to execution mode record, the commentary and the accompanying drawing that constitute a part of this disclosure should not be construed as limiting the present invention.According to the disclosure, the those skilled in the art can know various replacement execution modes, embodiment and application technology.
Specifically, one of them that has received among the wireless terminal 2A～2D of the notice of delay also can be accomplished the long more transfer rate that increases the signal that has utilized ascending time slot more time of delay included in this notice of delay.
At this moment, one of them the communication process portion 206 among the wireless terminal 2A～2D of the notice of delay of having received can also comprise the IF filter of other frequency bands except the IF filter 228 of the IF filter 226 that comprises the 300kHz band and 900kHz band.
And, received one of them among the wireless terminal 2A～2D of the notice of delay, under the time of delay situation shorter, connect the IF filter 226 of 300kHz band and the IF filter 228 of 900kHz band than the predetermined stipulated time.On the other hand, in having received the wireless terminal 2A～2D of the notice of delay one of them is under situation about growing than the predetermined stipulated time time of delay, except the IF filter 228 of the IF filter 226 that possesses 300kHz band and 900kHz band, the IF filter that can also connect other frequency bands can also make the transfer rate of the signal that has utilized ascending time slot further increase.
Perhaps, received one of them among the wireless terminal 2A～2D of the notice of delay, under the time of delay situation shorter, will be used for the modulation system that the signal of ascending time slot transmits and be set at 16QAM than the predetermined stipulated time.On the other hand, received one of them among the wireless terminal 2A～2D of the notice of delay, under the situation of lacking than the predetermined stipulated time time of delay, the modulation system that will be used for the signal transmission of ascending time slot is set at 64QAM, and the transfer rate of the signal that has utilized ascending time slot is increased.
Thus, present invention is to be construed as and be included in these various execution modes of not putting down in writing etc.Therefore, the present invention is only limited by the specific item of invention of the suitable claims of the disclosure.
Claims (12)
1. communication system, it has first communicator and a plurality of second communication device, utilizes a plurality of time slots of having cut apart behind the call duration time band to carry out the signal transmission between described first communicator and described a plurality of second communication device,
Described first communicator possesses:
Signal receiving part, it receives the signal that utilizes described time slot to send by described a plurality of second communication devices;
Delay time measurement portion, it measures the time of delay of the described signal that is received by described signal receiving part; With
Notice of delay sending part, it surpassed under the situation of allowed time in the described time of delay of being measured by described delay time measurement portion, the notice of delay of the described signal delay of expression is sent to as the described second communication device of described time of delay above the transmission source of the signal of described allowed time, and in the described second communication device in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay one of them, the wherein said allowed time is the maximum delay time of time location in described time slots band of described signal
Described second communication device possesses:
Notice of delay acceptance division, it receives the described notice of delay from described first communicator; With
Transfer rate increase portion, it is being received under the situation of the described notice of delay by described notice of delay acceptance division, and the transfer rate of the described signal that utilizes described time slot transmission is increased.
2. communicator, utilize a plurality of time slots of having cut apart behind the call duration time band and a plurality of other communicators between transmit signal,
This communicator possesses:
Signal receiving part, it receives the signal that utilizes described time slot to transmit by described a plurality of other communicators;
Delay time measurement portion, it measures the time of delay of the described signal that is received by described signal receiving part; With
Notice of delay sending part, it surpassed under the situation of allowed time in the described time of delay of being measured by described delay time measurement portion, the notice of delay of expression signal delay is sent to as described time of delay of described other communicators above the transmission source of the signal of described allowed time, and in described other communicators in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay one of them, wherein this allowed time is the maximum time of time location in described time slots band of described signal.
3. communicator according to claim 2, wherein,
Described notice of delay sending part sends the described notice of delay that comprises the described time of delay of being measured by described delay time measurement portion.
4. according to claim 2 or 3 described communicators, wherein,
Described communicator also possesses the frequency bandwidth expansion section, and this frequency bandwidth expansion section surpassed under the situation of described allowed time in the described time of delay of being measured by described delay time measurement portion, enlarge to be used for the frequency bandwidth that signal transmits,
Described notice of delay sending part sends the described notice of delay that comprises by the frequency bandwidth after the expansion of described frequency bandwidth expansion section.
5. according to any described communicator in the claim 2～4, wherein,
Described communicator also possesses the many-valued several increase of modulation portion, this is modulated many-valued several increase portion and surpasses under the situation of described allowed time in the described time of delay of being measured by described delay time measurement portion, the feasible many-valued number of modulation that is used for the modulation system of signal transmission increases
Described notice of delay sending part sends the described notice of delay that comprises the many-valued number of modulation after being increased by the many-valued several increase of described modulation portion.
6. according to any described communicator in the claim 2～5, wherein,
Described communicator also possesses collision detection portion, and the described signals from collision that is received by described signal receiving part detects in this collision detection portion,
Described notice of delay portion surpassed the described allowed time and is detected under the situation of described signals from collision by described collision detection portion in the described time of delay of being measured by described delay time measurement portion, sent the described notice of delay.
7. communicator, utilize a plurality of time slots of having cut apart behind the call duration time band and other communicators between transmit signal,
This communicator possesses:
Signal transmission unit, it utilizes described time slot to send signal to described other communicators;
Notice of delay acceptance division, surpass the time of delay of the signal that it receives in described other communicators under the situation of allowed time, reception is notified from the time-delay of the expression signal delay that described other communicators send, and the wherein said allowed time is the maximum delay time of time location in described time slots band of described signal; With
Transfer rate increase portion, it is being received under the situation of the described notice of delay by described notice of delay acceptance division, and the transfer rate of the described signal that utilizes described time slot transmission is increased.
8. communicator according to claim 5, wherein,
The described notice of delay comprises described time of delay,
The described time of delay that is included in the described notice of delay is long more, all the more fast described transfer rate of then described transfer rate increase portion.
9. according to claim 7 or 8 described communicators, wherein,
Next time slot of the time slot that described signal transmission unit is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay sends under the situation of described signal, makes to send to begin to postpone.
10. according to any described communicator in the claim 7～9, wherein,
The described notice of delay comprises the frequency bandwidth that is used for the signal transmission,
Described transfer rate increase portion will be used for the frequency bandwidth that described signal transmits and be set at the frequency bandwidth that is included in the described notice of delay.
11. according to any described communicator in the claim 7～10, wherein,
The described notice of delay comprises the many-valued number of modulation of the modulation system that is used for the signal transmission,
The many-valued number of modulation that described transfer rate increase portion will be used for the modulation system that described signal transmits is set at the many-valued number of the modulation that is included in the described notice of delay.
12. communication control method, be to have first communicator and a plurality of second communication device and utilizing a plurality of time slots after having cut apart the call duration time band between described first communicator and described a plurality of second communication device, to carry out communication control method in the communication system of signal transmission
This communication control method comprises:
Described first communicator receives the step of being utilized the signal of described time slot transmission by described a plurality of second communication devices;
The step of the time of delay of the described signal that the described first communicator measurement receives;
Described first communicator surpassed under the situation of allowed time in the described time of delay of measuring, the notice of delay of expression signal delay is sent to as the described second communication device of described time of delay above the transmission source of the signal of described allowed time, and one of them the step in the described second communication device in the transmission source of the signal that transmits as next time slot of the time slot that is utilized in the transmission that utilizes the signal that surpasses the described allowed time described time of delay, the wherein said allowed time is the maximum delay time of time location in described time slots band of described signal;
Described second communication device receives the step from the described notice of delay of described first communicator; With
Described second communication device is receiving under the situation of the described notice of delay, makes the step of the transfer rate increase of the described signal that utilizes described time slot transmission.
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| JP2008-331606 | 2008-12-25 | ||
| JP2008331606A JP5138574B2 (en) | 2008-12-25 | 2008-12-25 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION CONTROL METHOD |
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|---|---|---|---|---|
| CN1703851A (en) * | 2002-09-30 | 2005-11-30 | 阿雷伊通讯有限公司 | Frame structure for radio communications system |
| CN101039237A (en) * | 2006-03-16 | 2007-09-19 | 日本电气株式会社 | Radio communication system, radio base station, radio communication method, and program for radio communication system |
| US20080268857A1 (en) * | 2007-04-30 | 2008-10-30 | Mccoy James W | Channel sounding techniques for a wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03210839A (en) * | 1990-01-12 | 1991-09-13 | Iwatsu Electric Co Ltd | Time division communication system for mobile object communication |
| JP2663907B2 (en) * | 1995-04-05 | 1997-10-15 | 日本電気株式会社 | Base station apparatus, mobile radio communication system, and zone switching method |
| JP2003061152A (en) * | 2001-08-16 | 2003-02-28 | Nec Corp | Transmitter-receiver, transmission system, and propagation delay control method |
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- 2008-12-25 JP JP2008331606A patent/JP5138574B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1703851A (en) * | 2002-09-30 | 2005-11-30 | 阿雷伊通讯有限公司 | Frame structure for radio communications system |
| CN101039237A (en) * | 2006-03-16 | 2007-09-19 | 日本电气株式会社 | Radio communication system, radio base station, radio communication method, and program for radio communication system |
| US20080268857A1 (en) * | 2007-04-30 | 2008-10-30 | Mccoy James W | Channel sounding techniques for a wireless communication system |
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Application publication date: 20100908 |