CN1820470B - Wireless communication system and communication method - Google Patents
Wireless communication system and communication method Download PDFInfo
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- CN1820470B CN1820470B CN2004800197758A CN200480019775A CN1820470B CN 1820470 B CN1820470 B CN 1820470B CN 2004800197758 A CN2004800197758 A CN 2004800197758A CN 200480019775 A CN200480019775 A CN 200480019775A CN 1820470 B CN1820470 B CN 1820470B
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Abstract
In a time division multiplex access (TDMA-TDD) type wireless communication system in which a communication operation is carried out between a first communication apparatus (mother appliance) and a second communication apparatus (child appliance), and since a slot diversity mode is selected while considering power consumption on the side of the second communication apparatus, the wireless communication system performs such a wireless communication having a higher wireless quality. Based upon a power supply remaining energy capacity on the side of the second communication apparatus, and an electromagnetic wave environment when a wireless signal is received, a slot diversity mode is selected. For example, it is so assumed that 1 frame corresponds to 8 slots, a wireless signal is transmitted from the first communication apparatus to the second communication apparatus by employing two, or more slots, whereas a wireless signal is transmitted from the second communication apparatus to the first communication by employing one slot within the remaining 2 to 6 (8-2) pieces of the slots. As a result, since a total number of the wireless transmission slots used in the second communication apparatus is reduced, transmission electric power can be lowered which may occupy a large ratio within the entire power consumption.
Description
Technical field
The present invention relates to can be applicable to time slot diversity (slot diversity) so that improve the wireless communication system and the communication means of the radio communication quality in the TDMA-TDD system.
Background technology
Recently, at the radiotelephone installation that is used for wireless mode communication speech signal, the radio telephone system that TDMA-TDD (time division multiple access) the type digital communication system such as DECT system and PHS system has constituted main flow gradually replaces analog communication system.In this TDMA-TDD system, for example, when the frame that has the set time (constant time) is divided into " N " individual time slot (time slot), the received signal of multiplexing transmission signal in the time slot of each five equilibrium is carried out the multiplexed communications operation then between main equipment in digital telephone system (mother appliance) and the subset (child appliance).
In addition,, developed TDMA-TDD type communication equipment, and when the frequency order that will use changes, can in this frequency-hopping system, move, be used for the executive communication operation at the IMS frequency band.
Prevent during radio communication because air interference causes that it may be aspect very important one that communication quality descends.Usually say the what is called " channel switch method " that the mistake of using the TDMA type communication equipment of frequency-hopping system to adopt can to suppress air interference to cause occurs.In above-mentioned channel switch method, available channel strip is set to substitute the purpose alternate channel in traffic operation, then, when the channel (frequency) that switches with predetermined order except alternate channel, is carrying out radio communication under the wireless status preferably.When the wireless quality of the channel that is using reduces, communication counterpart is made the notice that is replaced the communication channel of quality reduction by alternate channel, and continue traffic operation.
On the other hand, Japanese patent laid-open publication gazette No.Hei-7-28248 discloses the frequency diversity in the time-diviional radiocommunication system.Promptly, in this frequency-diversity system, about adopting a plurality of frequencies, and when each time slot in 1 frame all the communication system of executive communication operation during switching frequency (, frequency-diversity system), all signals of each time slot in 1 frame are equal mutually, and by sending same signal in change carrier frequency aspect the time.One of time that should be noted in the discussion above that segmentation in 1 frame is called " time slot ".In addition, owing to frequency not only changes, and by in 1 frame, adopting a plurality of time slots to send same signals, so the technology of the disclosure also can be called " time slot diversity technique ".
On the other hand, be connected to by the main equipment of source power supply operation with wireless mode in this main equipment and the wireless communication system by battery-driven subset configuration, when carrying out the control operation of time slot diversity, owing to need a large amount of power consumption, there is the problem that reduces the mobility reduction that causes subset owing to call duration time.In the control operation of above-mentioned time slot diversity, in order to improve radio communication quality, send wireless signal from communication equipment in two or more time slots in same number of frames by identical transmission data-modulated, and other communication equipment receives the wireless signal of these a plurality of time slots, reproduces the such wireless signal with better communication quality then.In addition, even in electromagnetic wave environment preferably,, also can consume unnecessary electric power owing to carry out the control operation of above-mentioned time slot diversity.
Summary of the invention
Make the present invention and solve above-mentioned general issues, so the object of the invention provides and can improve the wireless communication system of wireless quality by adopting the control of time slot diversity.At first the present invention is characterised in that, be divided in time division multiple access (TDMA-TDD) the type wireless communication system of a plurality of time slots at the frame that will have the predetermined set time, multiplexing transmission signal and received signal in each of these time slots, executive communication operation between first communication equipment and second communication equipment then, when during to the second communication equipment sending data, sending identical transmission data by using two time slots from first communication equipment; With when from second communication equipment when first communication equipment sends data, send identical transmission data by using a time slot.In addition, a frame is divided in the TDMA-TDD system of " N " individual time slot therein, by using " B " (more than or equal to 2) sheet time slot to send data to second communication equipment from first communication equipment, and by adopt from remaining 2 time slots of selecting to " P (N-B) " sheet time slot from second communication equipment to first communication equipment transmission data.As a result, because the overall quantity in the wireless transmission gap of using reduces, can reduce the transmission electric power that accounts for whole power consumption significant proportions in second communication equipment.
In addition, owing to send data from second communication equipment to first communication equipment, can be reduced in the power consumption in this second communication equipment by adopting at the above-mentioned 2 individual time slots of " Pa " (" Pa " is less than " B ") that arrive in P (N-B) the sheet time slot.
Description of drawings
Fig. 1 is the block diagram that is used to indicate according to the Wireless Telecom Equipment of the formation wireless communication system of the invention process pattern 1.
Fig. 2 is illustrated in the format chart of the data format that adopts in the Wireless Telecom Equipment of Fig. 1.
Fig. 3 is the key diagram that is used for explaining the structure of time slot that is used for Wireless Telecom Equipment.
Fig. 4 is the precedence diagram that is used for setting up two Radio Links during the traffic operation of Wireless Telecom Equipment.
Fig. 5 is another precedence diagram of setting up two Radio Links during the traffic operation of Wireless Telecom Equipment.
Fig. 6 is used to explain allow/do not allowing the precedence diagram of the notice of the Radio Link between main equipment and subset during the traffic operation of Wireless Telecom Equipment.
Fig. 7 is used to explain in registration operating period allow/do not allow the precedence diagram of the notice of the Radio Link between main equipment and subset.
Fig. 8 is used to explain in registration operating period allow/do not allow the precedence diagram of the notice of the Radio Link between main equipment and subset.
Fig. 9 (a) is the structure chart according to the main equipment of the time slot diversity adaptive wireless communication system of embodiment of the present invention 2, and Fig. 9 (b) is the structure chart according to the subset of the time slot diversity adaptive wireless communication system of embodiment of the present invention 2.
Figure 10 is the figure that is used to indicate the example of time slot diversity operation.
Figure 11 is the block diagram according to the Wireless Telecom Equipment of embodiment of the present invention 3.
Figure 12 is the figure that is used to represent TDMA-TDD communication frame of the present invention.
Figure 13 is the figure that is used for indicating about in the example of the frequency characteristic of the fade-out of transmit path.
Figure 14 is the figure that is used to show the demonstration decline example that is made of direct wave and reflected wave.
Figure 15 is the figure that is used to indicate the frequency spectrum example that constitutes the interference that other electronic equipment sends.
Figure 16 (1) is used to indicate by the figure of decline effect to the negative effect of communication generation, is to be used to represent by the figure of interference to the negative effect of the generation of communicating by letter with Figure 16 (2).
Figure 17 (1) is used to show the improved figure that is obtained by frequency hopping, and Figure 17 (2) is used to indicate the improved figure that is obtained by a plurality of frequencies, and Figure 17 (3) is the improved figure that is used to show by the frequency acquisition of combination.
Embodiment
(execution mode 1)
Fig. 1 is the schematic block diagram of configuration that is used to indicate the Wireless Telecom Equipment of the formation wireless communication system of the present invention of executing mode 1 strictly according to the facts.Referring now to Fig. 1, the operation of Wireless Telecom Equipment will be explained.
As shown in Figure 1, this Wireless Telecom Equipment is furnished with antenna 101, transmitting element 102, receiving element 103, synthesis unit 104 and timing control unit 105.Antenna 101 sends and/or receives wireless signal.The transmission conversion of signals that transmitting element 102 will be imported is a wireless signal.The wireless signal that receiving element 103 demodulation are received.Synthesis unit 104 produces the wireless signal of frequency-hopping system, and produces the sine wave with desired frequency in demodulation operation.Timing control unit 105 produces the data structure timing of frame slot for the time division multiplexing operation.
The slot timing of this timing control unit 105 produces frames (carrying out segmentation by per scheduled time) regularly and in frame time of segmentation.Then, time timing control unit 105 is carried out the time division multiplexing operation on these frames timings and slot timing.
In addition, Wireless Telecom Equipment shown in Figure 1 also is furnished with Audio Processing Unit 106, the operating unit such as 10 digital input keys 107, electric bell 108 and is used to control the control unit 109 of the whole unit of Wireless Telecom Equipment.Audio Processing Unit 106 is a digital voice data with the voice signal digital translation of input, and the signal imitation that receives is converted to analog receiving signal.Electric bell 108 notice call receptions etc.
Next, the operation of wireless communication system is described according to execution mode 1.The voice signal that will be input in the wireless communication system by Audio Processing Unit 106 is converted to audio digital signals, and then, audio digital signals is provided to timing control unit 105.In timing control unit 105, in synchronizing signal that TDMA (time division multiple access) signal post is needed and the error detection occurs in required 124 yards audio digital signals that are added to of CRC (cyclic redundancy check (CRC)), then, by the timing output of the frame appointment of tdma communication voice signal as a result.
Will be below to when setting up a plurality of Radio Link by the single communication operation, the system situation that is chosen in the signal of the Radio Link of the received signal of acquisition under the better state is made explanations.It should be understood that the example of using two Radio Links with explaining.
In this case, timing control unit 105 is the be added to voice signal of digital processing of CRC sign indicating number required in synchronizing signal required in the tdma communication and the error detection occurs, exports two time slots (time slot) in the frame of tdma system then.At this moment, can be (in this case at same section, the transmission data of two time slots equate mutually) in the signal of speech data in be created in the speech data of each (two) time slot in the frame, in addition, as selection, also can from the signal of the speech data in the difference part (for example, in part), produce them in response to the difference between sending regularly.Under latter event, the transmission data of two time slots do not equate mutually.
By adopting the sine wave that obtains from synthesis unit 104, will be converted to wireless signal from (voice) data of timing control unit 105 outputs by transmitting element 102, then from antenna 101 these wireless signals of output.At this moment, about sinusoidal wave frequency, produce frequency so that carry out the traffic operation of frequency-hopping system with predetermined order from synthesis unit 104 outputs.
On the other hand, by adopting the signal that is received by receiving element 103 demodulation antennas 101 from the sine wave of synthesis unit 104 acquisitions, the signal with demodulation is provided to timing control unit 105 then.At this moment, about sinusoidal wave frequency, produce frequency so that carry out the traffic operation of frequency-hopping system with predetermined order from synthesis unit 104 outputs.
In addition, regularly generation unit 105 extracts the data division of voice signal from the demodulating data that receives from receiving element 103, and the data division with the extraction of voice signal outputs to Audio Processing Unit 106 then.By adopting two time slot executive communication operations in this case, about the data that in each time slot, receive, judge the senior reception data of selection according to CRC 124 mistakes, then, the reception data of selecting are outputed to Audio Processing Unit 106.At this moment, in single frame, send under the situation of same voice partial data, after the reception operation of having finished all data, one of any Audio Processing Unit 106 that outputs in these data.
In addition, send to adopt two time slots (for example from the speech data signal of each several part (in this case in response to the difference sending regularly from the difference part, the transmission data of two time slots are unequal mutually)) under the situation of the speech data that produces, do not have the reception data of CRC mistake to send to Audio Processing Unit 106 in proper order.At this moment, under the situation that produces this speech data part (its part and previous receiving slot and at first a back receiving slot of the receiving slot of description overlap), be discarded in the lap in the speech data of previous receiving slot.In Audio Processing Unit 106, the digital signal that sends to it is converted to analog signal, exports this analog signal then.
Under the situation that data send, send signal and directly enter timing control unit 105, and from the received signal of timing controling signal 105 outputs.Should be noted that about Wireless Telecom Equipment corresponding to the Wireless Telecom Equipment of the invention described above, for example, the configuration of the configuration of subset and operation and main equipment with operate similar.
Next, as the application example of wireless communication system of the present invention, the transmission/reception operation about the control purpose wireless signal in the radio telephone that is made of main equipment and subset is described.For example, operate at Wireless Telecom Equipment under the situation of main equipment, main equipment is output control destination data in the predetermined time slot of the communication frame of tdma system in a periodic manner usually.In other words, control unit 109 will be controlled destination data in the predetermined set time and output to timing control unit 105.This time slot that is used to send control data will be called " control time slot " below.
Timing control unit 105 is CRC sign indicating number required in synchronizing signal required in the traffic operation and the error detection occurs control data that is added to, then at this timing place output result data by the communication frame appointment of tdma system.Under the situation of the control time slot in voice signal is added to the radio telephone that is made of main equipment and subset, speech data that sends from Audio Processing Unit 106 and CRC sign indicating number thereof the above-mentioned control data that further is added to, then, timing place of appointment output result data in the transmit frame of tdma system.
By the sine wave that adopts synthesis unit 104 to obtain, in transmitting element 102, will be converted to wireless signal from the data of timing control unit 105 outputs, then, from antenna 101 these wireless signals of output.At this moment, about sinusoidal wave frequency, serve as that the control time slot produces frequency so that carry out the traffic operation of frequency-hopping system with predetermined order, and do not consider the fact of superposing voice data on the control time slot from synthesis unit 104 outputs.
In radio telephone corresponding to application example of the present invention, when communication equipment shown in Figure 1 is operated as its subset executive communication, this subset receive in a periodic manner the control channel that sends from its main equipment so as to set up the frame of tdma system and time slot synchronously, perhaps set up frequency-hopping system hop period synchronously.Control unit 109 control receiving element 103, synthesis unit 104 and timing control units 105 are so that receive one of control purpose communication frequency continuously.Control unit 109 executive control operation in the following manner: when receiving from control signal that main equipment sends, in this timing of the timing of the sending time slots of the control signal that is applicable to autonomous device, from continuous reception, receive one of control purpose communication frequency.At this moment, control unit 109 is carried out the control operation of receive frequency in following mode: the frequency order in the frequency of the frequency hopping that is used for controlling the purpose time slot changes this receive frequency.In addition, under by the situation of using two time slots (time slot that comprises the control information that superposeed) executive communication operation, to the superpose data of time slot of control information of the timing control unit 105 of receiving terminal communication equipment are divided into control information and other data (promptly, if the execution voice communication, then these data are corresponding to the speech data that will handle).
Fig. 2 represents data format.Fig. 2 (A) indicates the data format of the control time slot that is made of bit synchronization part 121, frame synchronization part 122, control data part 123, CRC 124.Fig. 2 (B) shows by bit synchronization part, frame synchronization part, control data part, CRC
1125, communication data part 126 and CRC
2The data format of the 127 communication objective time slots that constitute.Under the situation of voice communication operation, send speech data by using communication data part 126.In addition, by using control section to be sent in required control command, for example interrupt requests and frequency handoff request during the traffic operation.The be added to data format of the control time slot under the situation on the control time slot of Fig. 2 (C) expression communication data.Also by bit synchronization part, frame synchronization part, control data part, CRC
1, communication data part and CRC
2Constitute this data format.Then, in the voice communication operation, partly send the speech data that will superpose by using communication data.
Fig. 3 indicates structure of time slot.Fig. 3 represent respectively up direction (transmission of subset) and in down direction (transmission of main equipment) at the structure of time slot of multiplexing 4 time slots of a frame.Fig. 3 (A) shows that main equipment sends the example of control time slot at time slot 1.Fig. 3 (B) shows that main equipment sends control time slot, the example that main equipment is communicated by letter with subset in a Radio Link at time slot 2 at time slot 1.Fig. 3 (C) shows main equipment when time slot 1 sends the control time slot, and main equipment is in time slot 2 and the example of time slot 4 to communicate by letter with subset at two Radio Links.In addition, Fig. 3 (D) shows main equipment when time slot 4 sends the control time slot, and main equipment is at time slot 4 superposition of data, and the example of main equipment by adopting time slot 2 to communicate by letter with subset with two Radio Links.
In the example of Fig. 3, at first begin the traffic operation between main equipment and the subset; Set up first Radio Link; Set up second Radio Link; Then, the time slot of leading second Radio Link of control time slot.Above-mentioned flow operations is indicated by (A) → (B) → (C) → (D).
Table 1
| Frame number timeslot | Time slot | 1 | |
|
|
| |
f1 | f3 | f5 | f7 | |
| |
f2 | f4 | f6 | f8 | |
| |
f3 | f5 | f7 | | |
| Frame | |||||
| 4 | f4 | f6 | f8 | | |
| Frame | |||||
| 5 | f5 | f7 | | f3 | |
| Frame | |||||
| 6 | f6 | f8 | f2 | f4 | |
| Frame 7 | f7 | f1 | f3 | f5 | |
| Frame 8 | f8 | f2 | f4 | f6 | |
| Standby | f9 f10 | f9 f10 | f9 f10 | f9 f10 |
Table 1 has shown the example about the frequency hopping of frequency-hopping system.In this example, 8 kinds of frequencies " f1 " arrive " f8 " order as frequency hopping, and two kinds of frequencies " f9 " and " f10 " prepare to be used for channel switch and operate.In this table 1, file is presented at the frequency of using under the situation of carrying out the time division multiplexing operation in corresponding four time slots, and the frequency that the line indication is used in same number of frames.In other words, when frame number is 1, adopt frequency f 1 at time slot 1; Adopt frequency f 3 at time slot 2; Adopt frequency f 5 at time slot 3; Adopt frequency f 7 at time slot 4.Similarly, when frame number is 2, adopt frequency f 2 at time slot 1; Adopt frequency f 4 at time slot 2; Adopt frequency f 6 at time slot 3; Adopt frequency f 8 at time slot 4; When frame number surpassed 8, this frame number turns back to determined 1 of frequency in addition.
Send at main equipment under the situation of above-mentioned control information, when from each frame switching frequency of f1, f2---f8, this main equipment sends control information.Because subset receives a specific frequency (promptly continuously, in 8 frequency f 1 to f8 any one), subset receives the control information of main equipment in the timing when sending the control information of main equipment with same frequency, make subset can set up the synchronous of hop period.At this moment, be the part of control information owing to the information that sends control information at this time slot main equipment is notified, so also can set up slot synchronization.
In the time slot the time slot that sends control data except main equipment, main equipment receives on the receive frequency corresponding to the frequency of table 1 continuously, so that receive the data that send from subset.In other words, when main equipment when time slot 1 transmits control channel, in the frame with frame number 1, main equipment receives with frequency f 3 at time slot 2; Receive with frequency f 5 at time slot 3; And receive with frequency f 7 at time slot 4.Subset send Radio Link set up request (will be described later) to miscellaneous equipment so that when setting up Radio Link, by receiving the control time slot after setting up synchronously between time slot and the frequency, subset is carried out in except any time slot of control time slot with the frequency of the receive frequency that is suitable for main equipment and is sent at subset.
In addition, when main equipment and subset begin communications status, under the situation that the wireless status of in use characteristic frequency reduces, exchange this frequency by reserve frequency.At this moment, the frequency after communication counterpart is notified the frequency before exchange and exchanged is carried out the frequency handover operation then after the response that receives about these frequencies.
Should be understood that, when executive communication in a plurality of Radio Links, under the situation about in control purpose time slot, only sending control information and under the situation of the communication data that also superposes outside the processing control information, do not carry out said frequencies and substitute (channel switch) operation.
Fig. 4 has shown the control sequence of operation in tandem when main equipment is communicated by letter with subset that is used for setting up two Radio Links in concentric operating period, setting up under the situation of a plurality of Radio Links, in any other time slot except the control time slot, set up a plurality of Radio Links, and the control time slot moves to the time slot of the Radio Link of being set up.
At first, because subset sends request for building link and accepts to send from main equipment in the time slot except the control time slot link assignment, subset is set up Radio Link, and begin to be used for the activation control sequence of telephone communication, that is, the telephone communication on first Radio Link in the example of Fig. 4 begins request and telephone communication begins to respond.
At this moment, to similar with the situation of setting up Radio Link on the time slot except the time slot that is used for first Radio Link in the control time slot, subset sends request for building link.Because subset receives the link assignment of sending from main equipment, subset is set up second Radio Link then.At this moment, second Radio Link must with the situation of control time slot stack under, for example, as shown in Figure 4, under the situation that the residue message capacity diminishes,, forbid channel switch about being used for the frequency of second Radio Link.This is to control on the time slot because second Radio Link is added to.
As shown in Figure 4, under the situation of second Radio Link of subset side, accepting state reduces, and subset sends channel switch request in the Radio Link that communications status reduces.Then, attempt control information moved to particular link in the relevant Radio Link at main equipment, or control information is moved under the situation of particular time-slot at main equipment, main equipment does not allow the channel switch request about this time slot (being arranged to superposing control information on it) (otherwise control information has superposeed) thereon.The channel switch that main equipment returns about the channel switch request of sending from subset does not allow response.As a result, in this Radio Link, forbid the frequency exchange.
Move under the situation that is used for communication objective time slot so far at control purpose time slot, after setting up second Radio Link, main equipment begins to control time slot and moves to the time slot that is used in second Radio Link, at this moment, because another subset can not receive the control time slot of main equipment, subset search for once more main equipment the control time slot in case again with the control slot synchronization.In addition, at this moment, main equipment is regularly sending control information in old control time slot and old control time slot control time slot that moved to, multiplexing in the section.As a result, wait for another subset of main equipment can be temporarily in the time slot that old control time slot and old control time slot are moved to receiving control information, therefore can easily follow control time slot mobile of main equipment.During this period, can carry out a kind of like this method.That is, in old control time slot, main equipment moves control and announcement slot moves the time slot of destination, and another subset of reception control channel moves the control time slot in response to this notice.
In addition, later in second Radio Link, can only stop the transmit operation in any one of up direction and down direction, perhaps, can stop to send and receiving as selecting.In other words, in second Radio Link,, perhaps under the control identical, once carry out the communication of twocouese with initialization first link owing to set up second Radio Link so that carry out Synchronization Control.Yet, after having set up Radio Link, stop the transmission of up direction or down direction.Otherwise, stop to send and receiving operation.At this moment, in second Radio Link,,, do not need initialization to operate when receiving the processing of carrying out when mistake takes place even in the time can not carrying out the reception operation on the link side that is stopping owing to determining after Radio Link is set up, to stop the state of one of wireless channel in advance.For example, can invalidly not carry out channel switch operation and/or time gas exchange operation.
Fig. 5 display communication operating period is in the operation in tandem that is used for setting up two Radio Links, wherein set up the example of the operation in tandem of first Radio Link at main equipment, main equipment is by sending to subset with signal of communication (voice signal or picture signal) on the control time slot that this signal of communication is added to.At first, because subset sends request for building link and accepts to send from main equipment in the time slot except the control time slot link assignment, this subset is set up first Radio Link.
When the time slot of first Radio Link had been set up in the main equipment use, this main equipment sent to subset so that notification data is superimposed upon the control time slot with this message.In case receive this notice, subset begins to receive the control time slot, and begins to receive the data (that is, speech data or view data) that are added on the control time slot.In this case, when only when down direction (main equipment → subset) is set up Radio Link by two time slots,,, can keep communication as selection by only keeping a Radio Link in up link (subset → main equipment).For example, if carry out this transmit operation (promptly at down direction (main equipment → subset)), then by using two time slots to send the same voice data respectively, and at up direction (subset → main equipment), use a time slot to send speech data, when the mistake possibility reduces, can improve then from the sound quality of main equipment to the speech data of subset transmission.In addition, when speech data when subset sends to main equipment, can save electric power.As selection, when the data that begin up direction continuously send, on up direction and down direction, can set up two Radio Links.
More particularly, at the main equipment that drives by source power supply with by battery-operated and be connected to wireless mode in the wireless communication system that the subset of this main equipment constitutes, if carry out wherein by using two time slots to send the transmit operation of same voice data to subset from main equipment, and by using a time slot to send speech data from subset to main equipment, then can suppress the battery electric power consumption of subset, and can prolong the telephone relation time.
Fig. 6 is presented at the operation in tandem that is used for setting up two Radio Links during the traffic operation, the example that is used for the operation in tandem after subset is set up Radio Link, subset sends signal of communication by the sending time slots that uses subset, and this time slot is corresponding to the time slot of subset receiving control information.At first, because subset sends request for building link and accepts to send from main equipment in the time slot except the control time slot link assignment, this subset is set up first Radio Link.
When main equipment adopts when setting up the time slot of first Radio Link, this main equipment notice is used to allow be added to message on the control time slot of communication data.In case receive this message, subset begins the data transmit operation in the sending time slots of subset, and this time slot is corresponding to the sending time slots of main equipment control time slot, and main equipment begins to receive the data of second Radio Link in corresponding to the receiving slot of control time slot.In this case, can only in two time slots, set up two Radio Links, in down direction, keep a Radio Link at up direction.As selection, when communication data was superimposed upon on the control purpose time slot subsequently, the data that can begin in down direction sent, and set up two Radio Links in up direction and down direction.
Next, description allow/does not allow the operation of a plurality of Radio Links by the control time slot.The configuration of equipment is to shown in Figure 1 similar.When Wireless Telecom Equipment of the present invention operated to main equipment, this Wireless Telecom Equipment was exported the control destination data in the mode in cycle in the predetermined time slot of the communication frame of tdma system.In other words, control unit 109 will be controlled destination data in predetermined timing and output to timing control unit 105.Timing control unit 105 is CRC sign indicating number required in synchronizing signal required in the traffic operation and the error detection occurs control data that is added to, then at the timing place output result data of the communication frame appointment of tdma system.
At this moment, on the part of the control information that whether allows information about a plurality of Radio Links of single communication operation to be added to send from main equipment about relevant main equipment.
It should be understood that when sending control information or at every turn and can send this information in addition at interval at preset time.As selection, change to unallowable state at the state of main equipment from enable state, or change to from unallowable state under the situation of enable state and send once this information at least.In addition, at this moment, on voice signal is added to the control time slot and send under the situation of voice signal as a result,, in the frame result of tdma system, specifying regularly dateout then from speech data and 124 yards above-mentioned data that further are added to of CRC that Audio Processing Unit 106 sends.Transmitting element 102, will be converted to wireless signal by adopting from the data of timing control unit 105 outputs from the sine wave of synthesis unit 104 acquisitions, and from antenna 101 output wireless signals.
In addition, operate at Wireless Telecom Equipment of the present invention under the situation of subset, this subset need receive the control channel that main equipment sends in a periodic manner.Because subset receives the control channel that sends in a periodic manner, so can set up the frame synchronization or the slot synchronization of tdma system.Otherwise the hop period that can set up frequency-hopping system is synchronous.In addition, because subset receives control channel, subset can obtain whether to allow information about a plurality of Radio Links of single communication operation about main equipment.
Control unit 109 as the Wireless Telecom Equipment of subset operation is controlled receiving element 103, synthesis unit 104 and timing control unit 105 in the mode of one of continuous reception control purpose communication frequency.When receiving from control signal that main equipment sends, control unit 109 is according to the timing of the sending time slots of the control signal that sends from the main equipment mode executive control operation from continuous reception operation with one of continuous reception control purpose communication frequency.Simultaneously, this control unit 109 changes the frequency that receives operation in proper order according to the order of the frequency hopping of control purpose time slot.
Be included under the situation of this control information about the information of a plurality of Radio Links of a traffic operation about whether allowing, the subset of control signal that has received main equipment by this way with this information stores in control unit 109, and when executive communication was operated, this subset determined whether to set up a plurality of Radio Links according to stored information.In addition, under the situation of executive communication operation, when carrying out the voice communication operation, the received signal that will be controlled in the time slot by timing control unit 105 is divided into control information and another data, i.e. speech data of Chu Liing in comprising two time slots controlling time slot.As previously mentioned, when the sky (empty) of self Radio Resource (time slot) during greater than threshold value, main equipment allows subset to set up multilink in response to the permission request that sends from subset.
Next, be described in the operation that whether allows a plurality of Radio Links during the traffic operation.Fig. 7 indicates the transmit operation of carrying out from the subset to the main equipment, promptly allow the example of a plurality of Radio Links.When carrying out transmit operation in subset side, subset sends the link assignment request, and because subset receives link assignment from main equipment, sets up first Radio Link of twocouese.Therefore, subset send telephone communication begin the request.Therefore when main equipment received this telephone communication and begins to ask, this Master device operation electric bell was so that beginning call operation.At this moment, main equipment returns telephone communication to subset and begins to accept.
In this case, subset sends and is used to inquire about the multilink permission request that whether allows to set up a plurality of Radio Links.When the sky of self Radio Resource when allowing the threshold value of request about multilink, main equipment returns multilink to subset and allows response.When the user responds in main equipment side, main equipment returns the response notice to subset side, and the voice path that therefore moves main equipment and subset is so that the beginning traffic operation.
In order to set up second Radio Link, subset sends request for building link in the untapped time slot subsequently in first Radio Link, and accept the link assignment of autonomous device, make subset set up second Radio Link, and the speech data in two (first and second) Radio Links of transmission/reception.As mentioned above, in case begin voice communication operation at a Radio Link, and (half way) therebetween, the processing operation that begins to be used to set up second Radio Link.
In this embodiment, after the beginning voice communication, set up second Radio Link.There is other situation.That is, accept multilink permission notice from main equipment after, subset can begin to be used to set up the operation of second Radio Link, and does not need answer notification.When subset was accepted multilink permission notice, the timing of subset initialization second Radio Link can be used as any moment of selecting to be set to before traffic operation finishes.
Because own resource does not have null resource, allow request not allow to set up a plurality of Radio Links at main equipment about multilink, perhaps main equipment does not have under the situation of multilink feature, and this main equipment returns multilink and do not allow response (rather than multilink allows response).In addition, do not allow at main equipment under the situation of a plurality of radiolinks, do not exist because main equipment does not return multilink to allow response, so this main equipment may not allow the other method about a plurality of Radio Links of subset.In this case, can be used as selection and carry out other method.That is, when the Radio Resource when main equipment became sky and makes that main equipment can allow a plurality of Radio Link, the multilink that main equipment returns about subset allowed response.After this moment, the current operation of subset can be set up the operation of second Radio Link in advance.
The operation in tandem that Fig. 8 indication is carried out between main equipment and subset wherein allow/does not allow Radio Link, this figure to represent to allow the example of the situation of a plurality of Radio Links especially in registration operating period notice.When the power turn-on of subset, perhaps another base station of moving in the public system of subset makes when beginning the registration operation initialization registration operation.When initialization registration operation, send the link assignment request from subset, and accept link assignment from main equipment.Then, subset sends registration and begins request, then when main equipment acceptance registration begins to ask, main equipment therein storage package be contained in registration begin to ask in and be used to identify the code of subset, for example store subset ID therein, then, return to the subset registration and accept.Subset sends and is used to inquire about the multilink permission request that whether is allowed to set up a plurality of Radio Links about subset.
Allow at main equipment under the situation of a plurality of Radio Links that permission is asked about multilink, main equipment returns multilink to subset and allows response.In addition, forbid that at main equipment under the situation of a plurality of Radio Links that permission is asked about multilink, main equipment returns multilink to subset and do not allow response.Subset is stored permission/unallowable state therein, then, when this subset begins to communicate by letter with relevant main equipment, determines whether to carry out the operation that is used to set up a plurality of Radio Links according to the content of storage.In this example, make the notice that whether allows a plurality of Radio Links about main equipment in response to multilink permission request with from the response of subset.As selection, as being used for there is another kind of method to the method for subset notice permission/unallowable state (part of receiving information as the registration that comes autonomous device) explains.That is, main equipment can be notified permission/unallowable state by the part in period of registration this information of transmission/reception between main equipment and subset, and need not receive the request of sending from subset.
Next, the mode of operating by the user is explained and wherein allow/is not allowed the operation of a plurality of Radio Links.The configuration of the Wireless Telecom Equipment of this explanation is similar to the configuration of the Wireless Telecom Equipment of Fig. 1.In Fig. 1, switch the user select to allow/do not allow under the situation of a plurality of Radio Links, this user allow/does not allow order by using operating unit 107 inputs.The order that the control unit storage is imported.In traffic operation subsequently, control unit is in response to institute's canned data, and promptly permission/unallowable state determines whether to carry out the operation that is used to set up a plurality of Radio Links.Should be noted that can be in main equipment and subset any one in realize this function.
Be set at main equipment under the situation of non-enable state, this main equipment and with all subsets that this main equipment is communicated by letter between in the communication of setting up, this is provided with state and becomes effectively, therefore, can be with the communications setting undertaken by a plurality of Radio Links for not allowing.In addition, when subset is set to unallowable state,, then forbid only by of the communication of this subset by using a plurality of Radio Links to carry out if under enable state, main equipment is set.May use this setting operation so that the target below obtaining.That is, when the battery electric quantity of correlator equipment reduces, forbidden so that suppress this battery consumption by using a plurality of wireless communications that connect the road temporarily; And the wireless status between main equipment and corresponding subset is not according to mounting condition mutually not simultaneously, under the situation of wireless status variation, for example, under near the situation of the equipment that the interference source that may constitute the radio communication between main equipment and this subset has been installed the specific subset, only allow this subset, and do not allow other subset.As a result, Radio Resource can be effectively utilized, and the total quantity of telephone communication when setting up between main equipment and the subset can be increased in.
As selection, can carry out other method, wherein about permission/unallowable state is set, can be provided with independently from main equipment to the transmission of subset or from the transmission of subset to main equipment.For example, when not allowing from subset during, setting up under the first wireless second wireless situation that connects the road after connecting the road, only wirelessly connecting the transmission of carrying out autonomous device in the road second to the transmission of main equipment.Even should be noted in the discussion above that under illegal state, to send, for example set up request from the Radio Link that subset sends about setting up the second wireless even required transmission in road.After setting up the twocouese Radio Link, can stop from the transmission of subset to main equipment.As mentioned above, when permission/unallowable state is set, be provided with independently from subset to the transmission of main equipment or from the transmission of main equipment to subset.As a result, for example under near the situation of the equipment that the interference source that may constitute the radio communication between main equipment and this subset has been installed this main equipment, only allow up direction.As a result, Radio Resource can be effectively utilized, and the quality of reception of main equipment can be improved.Owing to only allow down direction, can suppress battery electric power consumption by this battery-driven subset.
In this example, after the beginning voice communication, begin to set up second Radio Link.There is another situation.That is, accept multilink permission notice from main equipment after, subset can begin to be used to set up the operation of second Radio Link and notify without wait-for-response.When subset was accepted multilink and allowed notice, the timing of subset initialization second Radio Link can be used as any time of selecting to be set to before the traffic operation.
Be that empty reason causes main equipment not allow to set up a plurality of Radio Links that allow request about multilink owing to there not being own resource, perhaps main equipment does not have under the situation of multilink feature, and this main equipment returns multilink and do not allow response (rather than multilink allows response).In addition, do not allow at main equipment under the situation of a plurality of Radio Links, do not exist because main equipment does not return multilink to allow response, this main equipment may not allow the other method about a plurality of Radio Links of subset.In this case, can be used as selection and carry out other method.That is, become sky so that main equipment can allow the moment of a plurality of Radio Links at the Radio Resource when main equipment, the multilink that main equipment can return about subset allows response.After this moment, the current operation of subset can be set up the operation of second Radio Link in advance.
In addition, another operation example that allow/does not allow a plurality of Radio Links is described.In Wireless Telecom Equipment, carry out the speech and data communication such as the phone directory data transfer operation.Compare with voice communication, under the situation of data communication, interim wireless malfunction can not made troubles to the user.In other words, even when wireless malfunction occurring,, also can guarantee the transmission of all these data owing under the repeating transmission control operation, resend the data of losing.Can carry out data and send, the user can not notice the fact that wireless malfunction more or less takes place simultaneously.
Therefore, according to the present invention, in Wireless Telecom Equipment, can switch about whether allowing the state of a plurality of Radio Links according to voice operating or data communication operation with function of voice communication and data communication function.For example, can carry out following method in addition.Promptly, allowing the voice communication operation but do not allowing under the situation of data communication operation, perhaps switch under the situation of permission/unallowable state of a plurality of Radio Links, so that the threshold value that does not allow a plurality of links in being used under the voice communication operational circumstances is less than the mode executive control operation of the threshold value that is used for not allowing a plurality of links under the data communication operational circumstances at dummy status according to Radio Resource.Then, when carrying out voice communication, can easily allow a plurality of Radio Links.Obviously, as mentioned above, can realize to be identified in voice communication operation and data communication operation, allow/not allowing the handover operation of a plurality of Radio Links like user's class of operation.
(experiment method 2)
Fig. 9 (a) is the structure chart according to the communication equipment that adopts in wireless communication system (main equipment) of embodiment of the present invention 2, and Fig. 9 (b) is the structure chart of other communication equipment (subset) of another communication party of the above-mentioned communication equipment of formation (main equipment) in the wireless communication system.Should be noted that a communication equipment will be called " main equipment ", and other communication equipment will be called " subset ".
At first, the configuration of main equipment will be explained.In Fig. 9 (a), Reference numeral 1 expression main equipment; Reference numeral 2 shows the line control unit of main equipment, is used to control common line; Reference numeral 3 is represented the main equipment control units, is used to the whole unit of the equipment of controlling, and for example, is used for setting up or discharging wireless connections, and is used for implementation quality control; Reference numeral 4 shows the main equipment radio-cell, is used for sending/receiving the data of wireless portion; With the input unit that can import telephone number of Reference numeral 5 indications such as 10 digital input keys.In addition, Reference numeral 6 shows display unit; Reference numeral 7 indications are connected to the voice processing apparatus of microphone or loud speaker, are used for voice signal A/D is converted to audio digital signals; Reference numeral 8 expression time slot control units are used for controlling the time slot that radio communication is used; Reference numeral 9 shows the magnetic field intensity measuring unit, is used to measure the () magnetic field intensity that receives from main equipment radio-cell 4, notifies main equipment control unit 3 with the magnetic field intensity of measuring then; With Reference numeral 10 indication mistake sensing cells, be used to carry out the mistake supervisory work of the data of the time slot that receives from main equipment radio-cell 4, notify main equipment control unit 3 with the mistake monitor message then.
Then, the configuration of subset will be explained.In Fig. 9 (b), Reference numeral 11 shows subset; The power subsystem of Reference numeral 12 indication subsets 11; Reference numeral 13 is represented the subset control units, is used to control the whole unit of subset, for example, is used for setting up and discharging wireless connections, and is used for implementation quality control; Reference numeral 14 shows the subset radio-cell, is used for sending/receiving the data of wireless portion; With the input unit that can import telephone number of Reference numeral 15 indications such as 10 digital input keys.In addition, Reference numeral 16 shows display unit; Reference numeral 17 indications are connected to the voice processing apparatus of microphone or loud speaker, are used for voice signal A/D is converted to audio digital signals; Reference numeral 18 expression time slot control units are used for controlling the time slot that radio communication is used; Reference numeral 19 shows the magnetic field intensity measuring unit, is used to measure the () magnetic field intensity that receives from subset radio-cell 14, notifies subset control unit 13 with the magnetic field intensity of measuring then; With Reference numeral 20 indication mistake sensing cells, be used to carry out the mistake supervisory work of the data of the time slot that receives from subset radio-cell 14, notify subset control unit 13 with the mistake monitor message then; In addition, Reference numeral 21 is indicated power supply dump energy administrative units, is used for the dump energy of managing electrical power unit 12.
The wireless communication system of Fig. 9 is described according to this execution mode 2 now.Promptly, in time division multiple access time division duplex (TDMA-TDD) type wireless communication system, main equipment 1 is via the wireless signal of radio-cell 4 definite identical transmission data-modulated between subset 11 sends by subset 11 and main equipment 1, simultaneously, be set to time slot control unit 8 from main equipment control unit 3 with " B " sheet time slot amount the same number of frames with about subset 11 definite timeslot numbers.Symbol " B " is more than or equal to 2 and smaller or equal to the N natural number of (symbol " N " is represented the natural number more than or equal to 4).In above-mentioned TDMA-TDD type wireless communication system, when the frame with predetermined set time is divided into " N " sheet time slot, multiplexing transmission signal and received signal in the time slot of each five equilibrium then, are carried out the multiplexed communications operation between main equipment 1 and subset 11.
Subset 11 will also be set to the time slot control unit by the timeslot number of subset control unit 13 settings from " Ba " sheet time slot amount " B " sheet time slot that main equipment 1 sends and actual reception thereof in same number of frames, and will receive via subset control unit 13.In addition, subset 11 sends by identical transmission data-modulated and the wireless signal determined about main equipment 1 via subset radio-cell 14 similarly, " Pa " sheet time slot amount and timeslot number thereof are set to time slot control unit 18 simultaneously, they are provided with by subset control unit 13, and the time slot that reality sends in " P " sheet time slot in same number of frames.Symbol " P " expression is more than or equal to 2, and smaller or equal to the natural number of (N-B).
In this case, for example, when " P " was not equal to " Pa ", main equipment 1 was carried out the repeatedly reception operation that equals " P " sheet time slot.Yet because subset 11 only sends " Pa " sheet time slot, main equipment 1 can not receive wireless signal (described time slot amount equals the difference of Pa and P) in a plurality of time slots, therefore, and can the sensing mistake.
As an example of the time slot diversity in this execution mode 2, be described in the content of indicating in the time slot diversity operation example of Figure 10.Total time slot amount of each frame equals 8, and timeslot number " 0 " to " 3 " is assigned to autonomous device 1 side's transmission purpose time slot, and timeslot number " 4 " to " 7 " is distributed to the transmission purpose time slot from subset side.
In these timeslot numbers, timeslot number " 0 " is used for having comprised to subset 11 notices from main equipment 1 control information and the timeslot number information of broadcast message.Main control unit 3 is set to 2 about time slot control unit 8 with above-mentioned " B " and also above-mentioned " P " is set to 2.In subset 11, sub-control unit 13 is set to 2 about time slot control unit 18 with above-mentioned " B " and also above-mentioned " P " is set to 2, in addition above-mentioned " Ba " is set to 2 and also above-mentioned " Pa " is set to 1.Under such condition that is provided with, two time slots that be provided with, that have timeslot number " 2 " and " 3 " send wireless signal from main equipment 1 to subset 11 between main equipment 1 and subset 11 by using, and owing to by the subset control unit in the subset 11 13 " Pa " is set to 1, come from subset 11 transmission wireless signals by adopting the timeslot number " 6 " and the time slot with timeslot number " 6 " in " 7 " that between subset 11 and main equipment 1, are provided with.If above-mentioned " Pa " is set to 2,, also send wireless signal to main equipment 1 from subset 11 even then in time slot with timeslot number " 7 ".
About the signal processing operations of carrying out in the equipment side that receives a plurality of time slots, as selection, can select the whole bag of tricks, for example select the data of the time slot that is free from mistakes; With though unless mistake takes place otherwise all adopt the data of up-to-date time slot continuously, also abandon the time slot that wherein goes wrong.
[table 2]
Because the transition example of the time slot diversity mode state of the power supply active volume of subset
| The power supply active volume | The time slot diversity mode |
| Greatly in | Fixed mode |
| Few | Send changeable mode (transmission/reception changeable mode) |
| Seldom | Lockout mode |
Next, describe about because the example of the transition of the time slot diversity mode state of the difference (as shown in table 2) in the subset power supply active volume.In this table 2, subset 11 can have above-mentioned four kinds of patterns, promptly can obtain following four kinds of patterns:
1) time slot diversity fixed mode
2) time slot diversity transmission changeable mode
3) time slot diversity transmission/reception changeable mode; With
4) time slot diversity lockout mode
1) in time slot diversity fixed mode, by adopting " B " sheet time slot amount in the same number of frames to send wireless signal by the identical transmission data-modulated of between main equipment 1 and subset 11, determining, and when actual reception time slot amount " Ba " is identical, time slot amount " Pa " by its actual transmission wireless signal equals the time slot amount " P " in " P " sheet time slot in the same number of frames, wherein by the identical transmission data-modulated wireless signal of determining between subset 11 and main equipment 1.
2) in time slot diversity transmission changeable mode, by adopting more than or equal to 1 and sending wireless signal with time slot diversity fixed mode to main equipment 1 less than a plurality of time slot amounts of " P ".
3) in time slot diversity transmission/reception changeable mode, by adopt more than or equal to 1 and less than a plurality of timeslot numbers of " B " with time slot diversity transmission changeable mode from main equipment 1 actual reception wireless signal.
4) in time slot diversity lockout mode, time slot amount " Pa " and " Ba " in time slot diversity transmission/reception changeable mode are set to 1.Should also be noted that in these four patterns standard as required can be installed the pattern of selecting quantity arbitrarily on subset 11.
In subset 11, the power supply active volume is notified subset control unit 13 from power supply dump power administrative unit 21 orders of the power supply active volume that is used for managing electrical power unit 12.As a result, judge under the situation of necessary patterns of change that subset control unit 13 request time slot control units 18 are carried out time slot and changed the processing operation at subset control unit 13.
The example of table 2 is corresponding to such status transition: the power supply active volume be greatly in situation under, still select fixed mode though power consumption is maximum, can guarantee the maximum wireless quality; Under the situation that the power supply active volume diminishes, select to send changeable mode; And under the power supply active volume is little situation, select lockout mode.As a result, when power consumption is very little, can guarantee sufficiently long call duration time.Be installed at transmission/reception changeable mode under the situation of subset 11, can replace sending changeable mode by transmission/reception changeable mode.Should be noted that in the example of this table 2, the time slot diversity transmission/reception changeable mode in above-mentioned 4 patterns is not installed.
[table 3]
Because the transition example of the time slot diversity mode state of subset
| Electromagnetic field intensity | The time slot diversity mode |
| High | Send changeable mode |
| Low | Fixed mode |
Next, with shown in the description list 3 because the example about the transition of time slot diversity mode of the electromagnetic field intensity that receives of subset 11.Subset radio-cell 14 by subset 11 receives the wireless signal that sends from main equipment 1, and by the electromagnetic field intensity of the received wireless signal of field strength measurement unit 19 measurements, the subset control unit 13 of the field intensity of measuring then transmission is so that judge.As the result of this judgement, when needs changed pattern, subset control unit 13 required time slot control unit 13 to carry out the time slot change and handles operation.
In the example of table 3, field intensity at time slot control unit 18 is under the situation of high strength state, sub-control unit 13 judges that the distance between main equipment 1 and the subset 11 is short, therefore, the transmission changeable mode is set, and be under the situation of low-intensity state in the field intensity of time slot control unit 18, the distance that sub-control unit 13 is judged between main equipment 1 and the subset 11, therefore will send changeable mode switches to fixed mode.
[table 4]
Because the example of the transition of the time slot diversity mode state that the mistake frequency of occurrences of the signal that subset receives causes
| The mistake frequency of occurrences | The time slot diversity mode |
| High in | Fixed mode |
| Low | Send changeable mode |
Next, as shown in table 4 with describing because the transition of the time slot diversity mode state that the mistake frequency of occurrences of the signal that subset 11 receives causes.Subset radio-cell 14 by subset 11 receives the wireless signal that sends from main equipment 1, and mistake sensing cell 20 judges whether received wireless signal comprises mistake, and then, judged result sends to subset control unit 13.At this moment, at subset control unit 13 (for example based on such judgment principle, the continuously sum or the unit interval mistake sum of mistake) under the judgment model situation about changing, subset control unit 13 request time slot control units 18 are carried out time slot and are changed and handle operation.In the example of table 4, when disturbing mistake frequency of occurrences high or middle owing to some, subset control unit 13 is provided with fixed mode.On the contrary, disturb to occur actually, and under the little situation of the mistake frequency of occurrences, subset control unit 13 switches to the transmission changeable mode with fixed mode
[table 5]
Because the power supply of subset can make the transition example of the time slot diversity mode state that power consumption nuclear electromagnetic field intensity causes.
| Power supply can make Yong Dianliang electromagnetic field intensity | High | Low |
| Greatly in | Send changeable mode | Fixed mode |
| Few | Send changeable mode | Fixed mode |
| Seldom | Lockout mode | Lockout mode |
Next, describe that Fig. 5 represents about because the example of the transition of the time slot diversity mode state that the electromagnetic field intensity that power supply can make power consumption and subset 11 receive causes.This is corresponding to the subset 11 with two functions explaining in table 2 and the table 3, wherein table 2 be about because the power supply of subset can make the transition of the time slot diversity mode state that the difference in the power consumption causes, table 3 is about because the transition of the time slot diversity mode state that the electromagnetic field intensity that subset 11 receives causes.
In the example of this table 5, the electromagnetic field state of judging the wireless signal of being measured by field strength measurement unit 19 at subset control unit 13 is under the situation of high state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with the transmission changeable mode.In the time can making power consumption seldom, when subset 11 request time slot control units 18 will send changeable mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.
On the contrary, judge that at subset control unit 13 the electromagnetic field state of the wireless signal of being measured by field strength measurement unit 19 is under the situation of low state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with the transmission fixed mode.In the time can making power consumption seldom, when subset 11 request time slot control units 18 will send fixed mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.
[table 6]
Because the power supply of subset can make the transition example of the time slot diversity mode state that the mistake frequency of occurrences of power consumption and received signal causes.
| Power supply can make the Yong Dianliang mistake frequency of occurrences | High in | Low |
| Greatly in | Fixed mode | Send changeable mode |
| Few | Fixed mode | Send changeable mode |
| Seldom | Lockout mode | Lockout mode |
Next, in the description list 6 expression about because the power supply of subset 11 can make the transition example of the time slot diversity mode state that the mistake frequency of occurrences of power consumption and received signal causes.This is corresponding to the subset 11 with two functions explaining in table 2 and the table 4, wherein table 2 be about because the power supply of subset 11 can make the transition of the time slot diversity mode state that the difference in the power consumption causes, and table 4 is about because the transition of the time slot diversity mode state that the mistake frequency of occurrences of the signal that subset 11 receives causes.
In the example of table 6, when mistake sensing cell 20 judges whether wireless signal comprises mistake, it is high under the situation of middle state to judge that at subset the mistake frequency of occurrences is in, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with the transmission fixed mode.When power supply can make power consumption seldom, when subset 11 request time slot control units 18 will send fixed mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.On the contrary, judge that at subset the mistake frequency of occurrences is under the situation of low state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with the transmission changeable mode.When power supply can make power consumption seldom, when subset 11 request time slot control units 18 will send changeable mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.
[table 7]
Because the transition example of the time slot diversity mode state that the electromagnetic field intensity of subset and the mistake frequency of occurrences of received signal cause.
| Electromagnetic field intensity the mistake frequency of occurrences | High in | Low |
| High | Fixed mode | Lockout mode |
| Low | Fixed mode | Fixed mode |
Next, in the description list 7 expression because the transition example of the time slot diversity mode state that the mistake frequency of occurrences of the electromagnetic field intensity that receives of subset 11 and received signal causes.This is corresponding to the subset 11 with two functions explaining in table 3 and the table 4, wherein table 3 is about because the transition of the time slot diversity mode state that the electromagnetic field intensity that receives of subset 11 causes, and table 4 is about because the transition of the time slot diversity mode state that the mistake frequency of occurrences of the signal that subset 11 receives causes.
In the example of this table 7, when mistake sensing cell 20 judges whether wireless signal comprises mistake, it is high under the situation of middle state to judge that at subset control unit 13 the mistake frequency of occurrences is in, even when the state of the wireless signal of being measured by field strength measurement unit 19 was in any field intensity state, subset control unit 13 request time slot control units 18 were provided with fixed mode.
On the contrary, judge that at subset control unit 13 the mistake frequency of occurrences is under the situation of low state, when the electromagnetic field intensity of the wireless signal of measuring by field strength measurement unit 19 when being high, the subset control unit is provided with lockout mode, and the electromagnetic field intensity that group device control cell 13 is judged the wireless signal of being measured by field strength measurement unit 19 is when low, and subset control unit 13 request time slot control units 18 switch to stationary state with off status.
[table 8]
Because the power supply of subset can make the example of the transition of the time slot diversity mode state that the mistake frequency of occurrences of power consumption, electromagnetic field intensity and received signal causes.
Next, in the description list 8 expression because power supply can make the transition example of the time slot diversity mode state that the mistake frequency of occurrences of power consumption, electromagnetic field intensity that subset 11 receives and received signal causes.This is corresponding to the subset 11 with two functions explaining in table 5 and the table 4, wherein table 5 be about because the electric field strength of subset 11 and power supply can make the transition of the time slot diversity mode state that power consumption causes, table 4 is about because the transition of the time slot diversity mode state that the mistake frequency of occurrences of the signal that subset 11 receives causes.
In the example of this table 8, the electromagnetic field intensity of judging the wireless signal of being measured by field strength measurement unit 19 at subset control unit 13 is in high state, mistake sensing cell 20 judges whether wireless signal comprises mistake in addition, and therefore subset control unit 13 judges that the mistake frequency of occurrences is in height under the situation of middle state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with fixed mode.When power supply can make power consumption seldom, when subset 11 request time slot control units 18 will send fixed mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.
In addition, similarly, judge that at subset control unit 13 electromagnetic field intensity is in high state, and judge that the mistake occurrence rate is under the situation of low state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with the transmission changeable mode.When power supply can make power consumption seldom, when subset 11 request time slot control units 18 will send changeable mode and switch to lockout mode with convenient minimum power consumption, can guarantee call duration time as far as possible longways.
Then, judge that at subset control unit 13 electromagnetic field intensity is in low state, mistake sensing cell 20 judges whether wireless signal comprises mistake in addition, and therefore subset control unit 13 judges that the mistake frequency of occurrences is in height under the situation of middle state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with fixed mode.When power supply can make power consumption seldom, when subset 11 request time slot control unit 18 switches to lockout mode with convenient minimum power consumption with fixed mode, can guarantee call duration time as far as possible longways.
At last, similarly, judge that at subset control unit 13 electromagnetic field intensity is in high state, and judge that the mistake occurrence rate is under the situation of low state, when power supply can make power consumption is big when (notifying subset control unit 13 from the power supply dump energy administrative unit 21 of power subsystem 12 with this information) less to neutralization, and the subset control unit 13 of subset 11 is provided with fixed mode.When power supply can make power consumption seldom, when subset 11 request time slot control unit 18 switches to lockout mode with convenient minimum power consumption with fixed mode, can guarantee call duration time as far as possible longways.
In the above-described embodiments, subset control unit 13 according to the mistake frequency of occurrences of power supply dump energy, the field intensity that receives and subset 11 about time slot control unit 18 switch modes.In addition, the user of subset 11 can force switch mode in conjunction with self judgment principle of above-mentioned Rule of judgment by adopting input unit according to the user.
The emphasis of the above-mentioned wireless communication system of embodiment 2 provides as follows: no matter what " Pa " and " Ba " of above-mentioned subset 11 be, main equipment 1 is not noted subset 11 which kind of pattern of installation or this subset 1 current actual conditions of operating fully under which kind of pattern for the transmission/receiving slot amount of time slot diversity continues to remain on above-mentioned " B " and " P ".As a result, can realize fast being used in connection executive communication under the various patterns, between main equipment 1 and a plurality of subset 11.
As mentioned above, according to time slot diversity adaptive communication system of the present invention, when the power supply dump energy of considering subset and electromagnetic wave environment, select to have more effective result's time slot diversity mode, and can improve radio communication quality.
(execution mode 3)
Next, another embodiment of the present invention 3 will be described.That is, a plurality of frequencies of using in same number of frames make up mutually, and this is subjected to the negative effect of the fading characteristic and the Electromagnetic Interference of transmit path hardly.
Figure 11 is the block diagram that is used to indicate the configuration of frequency hopping type according to this execution mode 3, time division multiplexing (TDMA-TDD) type communication equipment.In the figure, antenna 10 transmission/reception wireless signals.The wireless signal that receiving element 20 demodulation are received.Transmitting element 30 sends the wireless signal that produces from transmission signals.Local oscillator 40 produces the local oscillated signal that need be used for sending/receiving wireless signal.Be stored in the combination between the frequency of using in a plurality of time slots of the frequency of every frame saltus step and every frame in the frequency-hopping mode memory cell 50.Control unit 60 is exported in the predetermined time slot of communication frame and is used to the control signal that sends/receive, the frequency data that output is read from frequency-hopping mode memory cell 50, and manage the received field strength of each channel, select the frequency of combination mutually in addition.Received field strength sensing cell 70 detects the incoming level of the wireless signal that is received by receiving element 20, and in response to detected incoming level output signal.
Figure 12 represents the frequency frame of this wireless communication system.As shown in the drawing, such TDMA-TDD system construction is for when adopting a plurality of frequencies in same number of frames so that transmission/reception wireless signal, the every frame saltus step of frequency.The wireless signal that produces from the transmission signals of each frame has been divided into a plurality of frequencies, and then, the frequency of segmentation is added on each time slot of corresponding frequencies.Owing to from these a plurality of time slots, select one of these time slots (having accepting state preferably), so can obtain the frequency diversity effect.
When in same number of frames, adopting a plurality of frequency, owing to select to be in the optional frequency of better accepting state, to carry out under the situation of frequency diversity, the several method that will be used for determining a plurality of frequencies of using in frequency diversity is as example.
(example 1)
First example 1 is the method that is used for determining in the following manner frequency: the combination of frequency about a plurality of time slots of transmission in the same number of frames of frequency hopping type time division multiplexing (TDMA-TDD) wireless system constitutes the combination of frequency that has low correlation about the fading characteristic of radio propagation path.Figure 13 indicates this frequency to determine method.That is, about the fading characteristic according to prediction in advance of the state of radio propagation path or actual measurement, the frequency order that will adopt in same number of frames with the order of the low correlation of field intensity is defined as " f1 ", " f2 " and " f3 ".Because fade-out has a plurality of crests and trough, also has a plurality of groups of these combinations.For example, in the figure, f1, f22, f33 can make up mutually.If a plurality of frequencies in same number of frames make up mutually, the then combination of the frequency in the frame behind the frame that can determine similarly as basic principle at first to describe by these frequency intervals of employing.In other words, about pre-determined frequency hopping f1, f1 ', f1 ",--, such frequency can be defined as f2-f1=f2 '-f1 '==f2 "-f1 "--, f3-f1=f3 '-f1 '==f3 "-f1 "---so that become identical frequency interval.As a result,,, also can make up frequency mutually, make to obtain stable frequency diversity effect continuously with low correlation about fade-out even in subsequent frame.
(example 2)
Be used for determining that the example 2 of frequency is a kind of like this method.That is, in above-mentioned example 1, when adopting two time slots in same number of frames, adopt the combination of f1 and f2, this combination has the frequency relation that in fading characteristic corresponding frequencies becomes crest and trough.If determine the combination of two frequencies in same number of frames, then by adopting this combination of frequency can determine frequency interval in the frame behind this frame as basic principle.In other words, about pre-determined frequency hopping f1, f1 ', f1 ",---, can select such frequency so that become identical frequency interval, promptly f2-f1=f2 '-f1 '==f2 "-f1 "---.As a result,, can make up frequency, so that can obtain stable frequency diversity effect with low correlated characteristic about fade-out even in subsequent frame.
(example 3)
Be used for determining that the example 3 of frequency is a kind of like this method.That is, in above-mentioned example 1, when in same number of frames, adopting two time slots, can become the combination that the mode that approaches " λ 1/4xM " (symbol " M " is an odd number) is most selected corresponding frequencies with the relation " (λ 1-λ 2) xd/ λ 1 " of each frequency.Should be noted that symbol " d " indication forms the path difference between two main waveforms of fade-out.This can calculate from the state of the prior prediction of propagation path in the mode that two frequencies will using can be set up the crest of fading characteristic/trough relation.Figure 14 indicates this frequency to determine the concrete example of method.In this concrete example, suppose that two waveforms are the situation that direct wave and reflection wave trajectory poor " d " equal 7m.In the frequency of utilization scope is in the wireless communication system of 2.4GHz, f1=2.4GHz and channel spacing=1MHz, can satisfy above-mentioned relation and the frequency " f2 " that can constitute near combination of frequency equals 2.411GHz (M=1) (separating 11MHz with f1).Because symbol " M " is an odd number, when M=3 and 5, the frequency that can select to separate 33MHz and 55MHz.If determine in same number of frames the combination between two frequencies, then by adopting this value can determine frequency interval in the frame behind the frame of at first describing as basic principle.In other words, about pre-determined frequency hopping f1, f1 ', f1 ",---, can select such frequency so that become identical frequency interval, promptly f2-f1=f2 '-f1 '==f2 "-f1 "---.As a result,, can make up frequency mutually, so that can obtain stable frequency diversity effect with low correlated characteristic about fade-out even in subsequent frame.
(example 4)
Be used for determining that the example 4 of frequency is the method for above-mentioned example 3, the expanded range that is used for combination frequency is to the scope by " λ 1/4xM ± 1/8 " definition.If adopt the scope of " ± λ 1/8 ", then the frequency that has a low dependency relation about fading characteristic can make up mutually.As a result, can obtain above-mentioned diversity.
(execution mode 4)
Next, with the Wireless Telecom Equipment of explaining according to execution mode 4.Promptly, waiting for that operating period sends control purpose signal in a periodic manner from a Wireless Telecom Equipment, and another Wireless Telecom Equipment waits for that operating period receives in the Wireless Telecom Equipment of above-mentioned control purpose signal, according to the frequency of determining at the received field strength of each channel that receives in a periodic manner during the wait state to use during traffic operation.
Complicated and be difficult to obtain under the situation of fading characteristic in the characteristic of radio propagation path, select to have the frequency of low dependency relation according to the electromagnetic field intensity of the respective channel of actual measurement.Waiting for operating period, received field strength sensing cell 70 detects the incoming level of the wireless control signal that sends from the transmitting apparatus of communication counterpart, received by receiving element 20, then, notifies control unit 60 with detected incoming level.When control unit 60 management incoming level each channel, notice, this control unit 60 is according to high/low level relationship, and for example maximum, minimum value and median are determined combination of frequency in the mode identical with above-mentioned execution mode 1.If the interval between the frequency of having determined to make up, then follow-up operation and effect and execution mode 1 are identical.
As selection, waiting for that operating period sends control purpose signal in a periodic manner from a Wireless Telecom Equipment, and another Wireless Telecom Equipment waits for that operating period receives in the Wireless Telecom Equipment of above-mentioned control purpose signal, Wireless Telecom Equipment can be according at the received field strength of waiting for the control purpose received signal that operating period has received, selects to have the frequency of the highest received field strength and has combination between another frequency of minimum received field strength.
(execution mode 5)
Next will explain Wireless Telecom Equipment according to execution mode 5.Promptly, waiting for that operating period sends control purpose signal in a periodic manner from a Wireless Telecom Equipment, and another Wireless Telecom Equipment waits for that operating period receives in the Wireless Telecom Equipment of above-mentioned control purpose signal, Wireless Telecom Equipment can be according to the received field strength of the control purpose received signal that receives during operation, from frequency, select the first frequency group of predetermined quantity, and from frequency, select the second frequency group of predetermined quantity with minimum received field strength with the highest received field strength.Wireless Telecom Equipment can be respectively from first frequency group and frequency of second frequency group selection then.This execution mode 5 can enlarge the combination of frequency of selection as first frequency group and second frequency group corresponding to the execution mode that the maximum that obtains and minimum value all are expanded in above-mentioned execution mode 4.Can constitute total amounts this width, these frequencies and can be arranged on and effectively to obtain in the scope of frequency diversity, and can be stored in advance in the control unit 60.
(execution mode 6)
Next will explain Wireless Telecom Equipment according to execution mode 6.Promptly, waiting for that operating period sends control purpose signal in a periodic manner from a Wireless Telecom Equipment, and another Wireless Telecom Equipment waits for that operating period receives in the Wireless Telecom Equipment of above-mentioned control purpose signal, Wireless Telecom Equipment can be selected the first frequency group of predetermined quantity according to the received field strength of the control purpose received signal that receives during operation from the frequency with the highest received field strength, and selects the second frequency group of predetermined quantity from the frequency with minimum received field strength.Then, Wireless Telecom Equipment can become the combination of peaked frequency respectively as its difference of selection from first frequency group and second frequency group.This frequency selecting method is carried out as follows.That is, in above-mentioned execution mode 5, become maximum mode, from each of the first frequency group that obtained and second frequency group, select a frequency with its frequency difference.Be arranged in the frequency band of use and cause that this frequency selecting method is effective under the situation about the Electromagnetic Interference of above-mentioned Wireless Telecom Equipment at other electronic equipment.More particularly, about using the radio-based electronic devices of spread spectrum system, because the band spreading that electronic equipment takies, the probability that these radio-based electronic devices can not receive wireless signal is very high, if and frequency difference narrows down, then any selected frequency all may cause the phase mutual interference.As a result, the selection operation that is used to enlarge selected frequency difference can provide the advantage about noiseproof feature.
In addition, in the above-described embodiment, determining according to received field strength under the situation of frequency, when occur receiving mistake, invalid in this time slot the value of received field strength.As a result, can avoid confusion.That is, under the situation of another electronic equipment that exist to use same frequency band, the reception mistake by the phase mutual interference of fade-out or this equipment causes causes this to obscure.In other words, when occurring receiving mistake, suppose that the interference of another electronic equipment has influenced the frequency of using negatively, then the field intensity of the frequency in this time slot is zero (void).
(execution mode 7)
That the bright execution mode 7 of this law is used to determine to use in same number of frames and have a frequency more than or equal to the frequency difference of preset frequency.As shown in figure 15, under the situation that has another electronic equipment that uses same frequency band, thereby, the difference between the frequency is wider than the shared bandwidth of this electronic equipment, so the negative effect that one of at least two frequencies are not interfered because being expanded.This wireless communication system that use is in ISM (the industrial chemistry medicine purpose) frequency band of the frequency of 2.4GHz is described as typical case.Owing in this frequency band 2.4GHz, use the various electronic equipments such as microwave oven and WLAN, be easy to produce electromagnetic interference at this frequency band.Especially, recently, because WLAN is widely current, so in the radio-based electronic devices of the appearance of the phase mutual interference that causes about these WLAN, must cause special concern.Because the occupied bandwidth of WLAN is about 20MHz, if be provided with the frequency difference that is higher than or approximates 21MHz greatly, then at least one frequency can be fled from this Electromagnetic Interference, therefore, can keep communication quality.
On the other hand, about giving the interference of WLAN, because this wireless communication system corresponding to frequency-hopping system, can alleviate this interference substantially.Yet if the sum of the total amount of the time slot that sends and frequency hopping increases, the probability that disturbs also increases.As a result, preferably do not adopt two time slots to send wireless signal.The result, a wireless device for this wireless communication system, when frequency-hopping method only is applied to the recipient, if may cause the frequency transmission wireless signal of accepting state preferably by using, then given interference can be alleviated, frequency diversity effect can be actual kept simultaneously equivalently about given interference.The operating time of the transmit leg of the bigger power consumption of needs can be suppressed to half operating time owing to be used for only using frequency hopping to this method of recipient, under the situation by a battery-operated wireless device, this method can become very effective approach.
As selection, when the frequency of using is confirmed as having frequency difference more than or equal to preset frequency, can select two class frequencys in same number of frames can satisfy about the Electromagnetic Interference condition of decline effect and the mode of corresponding conditions of the present invention.As a result, interference can be avoided, frequency diversity effect can be obtained simultaneously about fade-out about other electronic equipments that use same frequency band.
Should be noted that in the above-described embodiment, according to the frequency of selecting in the electromagnetic field intensity of waiting for the operating period acquisition to merge mutually.As selection, when this Wireless Telecom Equipment during operation is in when betransporteding state, if selected the frequency of wanting mutual self adaptation to merge according to the electromagnetic field intensity that during traffic operation, obtains, then can realize having the more self adaptation type frequency diversity of effective efficiency.
Industrial applicability
As mentioned above, according to the present invention, about the fade-out of radio propagation path and the electromagnetic interference of using other electronic equipment of same frequency band to produce, can be more effectively and more stably obtain the frequency diversity effect.
Claims (5)
1. a frequency hopping type wireless communication system is carried out the time division multiplexing operation therein, and carries out the traffic operation of time-multiplexed signal of communication, switches two or more frequencies simultaneously between a communication counterpart and self wireless communication system, wherein:
First communication equipment is by adopting at least one time slot in a plurality of time slots in the predetermined frame period, transmission constitutes reference with regular fashion or irregular mode control purpose information;
The second communication equipment that constitutes the communication counterpart of first communication equipment is waiting for that operating period receives part or all of all control purpose information, with frame and slot timing and synchronous, and when beginning traffic operation, sets up second communication equipment a plurality of Radio Links about the timing of the frequency hopping operation of first communication equipment;
First communication equipment is added to a time slot so that set up Radio Link with communication objective signal and the control purpose information used between first and second communication equipments; With
Second communication equipment sends the communication objective signal about first communication equipment, only uses a Radio Link of selecting in response to ambient condition from a plurality of Radio Links simultaneously.
2. wireless communication system as claimed in claim 1, wherein:
Wireless communication system also comprises:
Controller, be used for controlling as follows wireless communication system: when first and second Wireless Telecom Equipments intercom mutually, setting up under the situation of a plurality of Radio Links, setting up Radio Link at a plurality of time slots except the control time slot that is used for sending control purpose information, and will control purpose information and be added on the time slot of the Radio Link set up.
3. wireless communication system as claimed in claim 1, wherein:
After in first communication equipment, having set up first Radio Link, the signal of communication of the second communication equipment that on the control time slot, is added to.
4. frequency hopping type wireless communication system, therein, produce frame and each scheduled time by segmentation time cycle each scheduled time and be subdivided in time cycle in the frame, carry out the time division multiplexing operation, and, switch 2 or multi-frequency more about a Radio Link simultaneously with time-multiplexed mode executive communication operation; Wherein:
First communication equipment and the second communication equipment that constitutes the communication counterpart of first communication equipment can be that first and second communication equipments are set up Radio Link by controlling that purpose information is added on the communication objective signal, and during traffic operation, set up at least one Radio Link, and can be chosen in its communication quality preferably the restituted signal in the Radio Link come the executive communication operation;
First communication equipment comprises:
Dispensing device is used to send to comprise to be used to notify whether can set up the control purpose information of the control information of a plurality of Radio Links with regular fashion or irregular mode;
The second communication equipment that constitutes the communication counterpart of first communication equipment comprises:
Receiving system is used for receiving control purpose information;
Second communication equipment determines whether and can set up a plurality of Radio Links about the control purpose information that sends from first communication equipment; With
The second communication device responds is controlled in above-mentioned determining, determine whether set up a plurality of Radio Links so that executive communication is operated, or determine whether this second communication equipment sets up a Radio Link so that the executive communication operation at this second communication equipment of communication period.
5. frequency hopping type wireless communication system, therein, produce frame and each scheduled time by segmentation time cycle each scheduled time and be subdivided in time cycle in the frame, carry out the time division multiplexing operation, and, switch 2 or multi-frequency more about a Radio Link simultaneously with time-multiplexed mode executive communication operation; Wherein:
First communication equipment and the second communication equipment that constitutes the communication counterpart of first communication equipment can be that first and second communication equipments are set up Radio Link by controlling that purpose information is added on the communication objective signal, and during traffic operation, set up at least one Radio Link, and can be chosen in its communication quality preferably the restituted signal in the Radio Link come the executive communication operation;
First communication equipment comprises:
Notifying device is used for notifying first communication equipment whether to allow to set up a plurality of Radio Links by the mode of wireless signal;
Second communication equipment comprises:
Inquiry unit is used for inquiring about whether allow a plurality of Radio Links by the mode of wireless signal;
Before the beginning traffic operation, second communication equipment from inquiry unit query communication device about whether allowing to set up a plurality of Radio Links; Allowing in response to advise fate to set up under the situation of a plurality of Radio Links, operate second communication equipment in the mode of setting up a plurality of Radio Links; And, operate second communication equipment in the mode of only setting up a Radio Link not allowing to set up under the situation of a plurality of Radio Links in response to advise fate.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP195058/2003 | 2003-07-10 | ||
| JP2003195058A JP4311100B2 (en) | 2003-07-10 | 2003-07-10 | Slot diversity wireless communication device |
| JP2003195055A JP4314905B2 (en) | 2003-07-10 | 2003-07-10 | Wireless communication device |
| JP2003195056A JP4385665B2 (en) | 2003-07-10 | 2003-07-10 | Wireless communication apparatus and communication system |
| JP195056/2003 | 2003-07-10 | ||
| JP195055/2003 | 2003-07-10 | ||
| PCT/JP2004/010145 WO2005006675A2 (en) | 2003-07-10 | 2004-07-09 | Wireless communication system and communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1820470A CN1820470A (en) | 2006-08-16 |
| CN1820470B true CN1820470B (en) | 2010-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2004800197758A Expired - Lifetime CN1820470B (en) | 2003-07-10 | 2004-07-09 | Wireless communication system and communication method |
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| JP (1) | JP4311100B2 (en) |
| CN (1) | CN1820470B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100709803B1 (en) | 2005-04-15 | 2007-04-23 | 주식회사 팬택 | Diversity Method and Mobile Communication Terminal Implementing the Same |
| JP5343045B2 (en) * | 2010-07-09 | 2013-11-13 | 株式会社日立製作所 | Wireless communication system and wireless communication method |
| JP7268574B2 (en) * | 2019-10-17 | 2023-05-08 | 株式会社デンソー | Communications system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544075A (en) * | 1993-07-20 | 1996-08-06 | Thomson-Csf | Method to optimize the bit rate of a communications channel in time-division mode |
| CN1157508A (en) * | 1995-10-06 | 1997-08-20 | 日本电信电话株式会社 | Time Division Multiple Access Communication Method and Device |
| CN1298578A (en) * | 1998-02-27 | 2001-06-06 | 西门子公司 | TDD telecommunications systems with wireless telecommunication based on code and time-division multiplex |
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2003
- 2003-07-10 JP JP2003195058A patent/JP4311100B2/en not_active Expired - Lifetime
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- 2004-07-09 CN CN2004800197758A patent/CN1820470B/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5544075A (en) * | 1993-07-20 | 1996-08-06 | Thomson-Csf | Method to optimize the bit rate of a communications channel in time-division mode |
| CN1157508A (en) * | 1995-10-06 | 1997-08-20 | 日本电信电话株式会社 | Time Division Multiple Access Communication Method and Device |
| CN1298578A (en) * | 1998-02-27 | 2001-06-06 | 西门子公司 | TDD telecommunications systems with wireless telecommunication based on code and time-division multiplex |
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| Publication number | Publication date |
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| JP4311100B2 (en) | 2009-08-12 |
| CN1820470A (en) | 2006-08-16 |
| JP2005033417A (en) | 2005-02-03 |
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