CN1233143A - Personal access communication system and communication method in personal access communication system - Google Patents
Personal access communication system and communication method in personal access communication system Download PDFInfo
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- CN1233143A CN1233143A CN 99105573 CN99105573A CN1233143A CN 1233143 A CN1233143 A CN 1233143A CN 99105573 CN99105573 CN 99105573 CN 99105573 A CN99105573 A CN 99105573A CN 1233143 A CN1233143 A CN 1233143A
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Abstract
In a personal access communication system (PACS), if fast information channel FC is not used, a low rate channel SC is adapted to indicate whether a relative time slot becomes an idle time slot. In addition, while the fast information channel is in use, bits involved in a cyclic redundancy code CRC combines with a plurality of predetermined bits in the low rate channel SC, then the bits combined as novel cyclic redundancy code can perform error detection and/or error correction for signal transmitted/received by the fast information channel FC. As a result, the invention can improve reliability of data transmitting/receiving via the fast information channel FC.
Description
The means of communication that the present invention relates to individual access communication system (PACS) and in this PACS, use.More particularly, the present invention relates to effectively to use the technology of low rate channel used in the PACS system.
Individual's access communication system (after this being called as " PACS " system) is a kind of mobile communcations system, and it can provide high level communication quality when improving the data transmission.In this PACS system, as narrow than traditional mobile communcations system of the communication context of a radio port RP of wireless base station, substitute this narrow communication context, the sum of the radio port in service area will increase.Equally, use time division multiplexing access/Frequency Division Duplexing (FDD) (TDMA/FDD) system, thereby solved the wireless frequency problem of shortage in this PACS system.
Now, will the structure of the radio port (aviation port) that uses in the PACS of present feasible system be described.Figure 1A shows form according to the signal that is sent out/receives in the wireless portion of ANSI (American National Standards Institute (ANSI)) standard J-STD-014 in this PACS system to 1C.As shown in Figure 1A, in this radio port, in 1 second, be sent out/received 400 frames.In other words, the data of 384K bit in 1 second, have been sent out/have received.Its result has sent/has received the data of 1 frame in 2.5ms (millisecond), therefore, be sent out/receive the data of 960 bits in 2.5ms.Each of these frames all is assigned to one of them port.As shown in Figure 1B, 1 frame is divided into 8 sections time slots (or time slot or pulse train).
In 8 groups of above-mentioned time slots, 7 groups of time slots are used to telephonic communication, and wherein remaining 1 group of time slot passes through a radio port to each users broadcasting public information.This remaining time slot is provided the logic channel name of " system information channel " by name.Use this system information channel, thereby following every content is broadcast to all users in the service area of relevant radio port, i.e. the identification id of this radio port, ID, and the contents such as kind by the available service of this radio port of the wave point controller of the last stage arrangement correspondence of radio port therewith.
In each time slot of these time slots, the signal of transmission/reception 120 bits in 312.5 microseconds.Its result and since this use be contained in the subscriber unit of 1 time slot in 1 frame can be in 2.5 milliseconds the signal of transmission/reception 120-bit, this subscriber unit can send/receive the signal of 48K bit in 1 second.
As shown in Fig. 1 C, each time slot all comprises the channel SYNC of a 14-bit synchronous, a 10-bit low rate channel SC, and a 80-bit Fast Channel, a 15-bit cyclic redundancy code CRC, and a 1-bit keeps channel.Synchronizing channel SYNC can set up the synchronous of this time slot.Equally, sometimes, use this synchronizing channel SYNC indication time of fire alarming.
Fast Channel FC is the main channel that is used to send/receive data, wherein comprises any call progress information, voice messaging, bag and similar information between wave point RP and User Part SU.Owing to the signal that can in 2.5ms, send/receive the 80-bit by Fast Channel, in 1 second, can send/receive the signal of 32K bit.
Low rate channel SC is the second channel that is used for transmission/reception data between radio port RP and User Part SU.And the first channel FC is used as the telephonic communication path, and information is sent/receives by this low rate channel SC.Its result, the characteristics of the signal that sends/receive by this low rate channel SC are the slow and narrow bandwidth of velocity variations.
Cyclic redundancy code CRC can be used to detect and/or adjusting pin to the mistake of 90-bit code.By 10 bits of low rate channel SC and the 80 bit additions of Fast Channel FC are obtained 90 bits.Keeping channel is retained in this PASC system.In addition, this reservation channel can be used to power control channel.
Fig. 2 is illustrated in the data that send among the low rate channel SC, and in the case, this relevant time slot becomes empty time slot.As shown in Figure 2, in sending each (bit) of data, added label 1 to 10, wherein LSB (least significant bit (LSB)) is set to " 1 " and MSB (highest significant position) is set to " 10 ".Be included in this " W " (position 1) that sends in the data and be used as " WEI " (wrongly written character is represented symbol).Comprising this sends position 6 to 2 in data whether be used to represent relevant time slot is empty.When these bit patterns of 6 to 2 became " 1000 ", this bit pattern represented that the time slot of being correlated with becomes sky.Be included in remaining 10 to 7 bit rate that limits this related time-slot by bit pattern in these transmission data.
When using Fast Channel FC, in low rate channel, send recognition data.Thereby indicate the data that just are sent out/receive by Fast Channel FC whether corresponding to user profile or information by using this recognition data.Above-mentioned user profile comprises for example voice messaging.In the case, the Fast Channel FC that is used to send/receive speech data is meant " user interface channel (UIC) ".Equally, the Fast Channel FC that is used to send/receive information is meant " information Fast Channel (MC-F) ".Yet, can assert, though be enough to constitute above-mentioned recognition data, in this PACS system, can't fully use the low rate channel SC of this 10-bit by the data of 1-bit.
As relevant technology, for example disclosed " channel switching method in the TDMA mobile communcations system " of this kind among the flat 3-154439 of disclosed Japan Patent JP-A-in 1991.This traditional channel switching method is used in the mobile communcations system, and this system is made of a plurality of wireless base stations and a plurality of wireless mobile.The wireless channel that is used in this mobile communcations system comprises a plurality of frequencies-minute channel, each of the channel of these frequencies also according to the time-division multiple access (TDMA) method by multiplexed.Wireless channel is made of the control frequency channel and the telephonic communication channel that constitute by control signal time slot and information time slot, and all time slots equal the information time slot in the telephonic communication channel equally.This mobile communcations system of wireless base-station control, the transmission/reception of the control signal of this system are to be undertaken by the control signal time slot that controls frequency channels, and telephonic communication is undertaken by the information time slot.When the quality of telephonic communication is lowered, wireless mobile switches into control frequency channel with the telephonic communication channel, thereby the information time slot by the control frequency channel is set up telephonic communication, and same and above-mentioned channel handover operation combines and receives the control signal of launching from a plurality of wireless base stations.
Equally, in the flat 7-240959 of disclosed Japan Patent JP-A-of nineteen ninety-five, disclosed alternative relevant technology " channel handover control system ".This channel handover control system is used to the mobile communcations systems that are provided with by a plurality of zone, this mobile communcations system be equipped with regional associated and carry out the base station of wireless telecommunications with mobile radio station and be used to control the base-station control apparatus of these base stations.In this mobile communcations system, when sending the channel switch request of higher electric field and when mobile radio station sent quality and reduces channel switch request, base-station control apparatus can be handled the quality with limit priority and reduce channel switch request from mobile radio station by the base station.Become when being lower than predetermined communication quality at current communication quality, it is limited less that this quality reduces the communication quality surplus that channel switch request has.As the result of this operation, can keep required telephonic communication quality.
Above-mentioned declarative description the current situation of PACS system.As previously mentioned, the effect that is defined through the low rate channel SC of 10 bit transmission/reception data can't be effectively used.
Therefore, an object of the present invention is to provide a kind of PACS system that can effectively utilize low speed SC, a kind of means of communication that are used for this PACA system are provided equally.
In PACS according to the present invention system, if do not use Fast Channel SC, then use low rate channel SC, thereby use the time slot relevant whether to become sky with traditional PACS system similar method indication.On the other hand, when using Fast Channel, be included in the cyclic redundancy code a plurality of bits by be included in low rate channel SC in a plurality of bits of preliminary election combine, combined then bit is with respect to the signal that is sent out/receives by Fast Channel FC and quilt is used as error-detecting code and/or error-correcting code.Its result can improve the reliability by Fast Channel FC transmission/received signal.
Will clearer understanding be arranged to the present invention by detailed description below with reference to accompanying drawing.
Figure 1A is the format chart of signal structure that is used for representing the wireless portion of PACS system to 1C;
Fig. 2 expresses the translation data of the low rate channel under the situation of not using Fast Channel FC;
The transmission data of the low rate channel when Fig. 3 illustrates the use Fast Channel FC of use according to the present invention in the PACSA system;
Fig. 4 illustrates the schematic diagram of the structure formation of PACS system according to an embodiment of the invention;
Fig. 5 A illustrates the flow chart of the operation of PACS system according to an embodiment of the invention to 5B.
With reference now to accompanying drawing,, PACS according to the present invention (individual access communication system) system is described in detail.
Be noted that, situation below must considering, the a plurality of bits (being meant " Extended Cyclic redundant code ") that wherein are arranged in the pre-selected locations of low rate channel SC combine with a plurality of bits that form cyclic redundancy code, thereby are used as new cyclic redundancy code NCRC.
1) when not using speed code, owing to also do not use cyclic redundancy to detect, the transmission data in low rate channel SC must be used to indicate relevant time slot to become an empty bit pattern by instantaneous becoming.
2) bit pattern of Extended Cyclic redundant code ECRC needn't be become a bit pattern that is used to indicate time slot change sky.
3) when using Fast Channel, must provide such bit.That is, whether this bit representation Fast Channel FC can be used as user interface channel UIC, or Fast Channel FC can be used as fast information channel in dab receiver MC-F.
4) needed another is the position of definition recovery request sign.This recovery request sign be used to from first mode of operation according to the present invention return to according to traditional PACS system the operator scheme of second mode of operation.
Fig. 3 is illustrated in the example according to the transmission data that are sent out among above-mentioned every low rate channel SC that has been determined.This sends data and is made of " r "-sign (position 1), fixed bit (position 2), Extended Cyclic redundant code ECRC (position 9 puts 3 in place) and " f "-sign (position 10).What need were clear and definite is that above-mentioned " r " sign is used as the recovery request sign.In the case, the operator scheme of low rate channel SC need be returned to the second traditional mode of operation from the first above-mentioned mode of operation, and this " r "-sign is set to logical one, and this " r " that is set sign is notified to communication counting side.
Fixed bit is by the continuous logical one that is set at.Its result, even work as the bit pattern that extended cyclic code ECRC becomes any kind of, the cyclic redundancy code of this expansion can not be configured for indicating this time slot to become empty bit pattern yet.
" f "-sign has defined the content by the signal of Fast Channel FC transmission/reception.For example, the fact that this logical zero is set to this " f " sign shows that this Fast Channel FC can be used as the user interface channel, thus transmission/reception data.On the other hand, the fact that this logical one is set to this " f "-sign shows that this Fast Channel FC can be used as quick information channel MC-F, thus transmission/reception data.Because Extended Cyclic redundant code ECRC combines with cyclic redundancy code CRC, this expansion redundant code ECRC can be used as the part of new cyclic redundancy code NCRC sign indicating number.
Fig. 4 illustrates the structural representation of PACS system according to this embodiment of the invention.This PACS system is by a plurality of subscriber units 10
1, 10
2,---, a plurality of radio ports 20
1, 20
2---; And radio port controller 30 constitutes.In these subscriber units each is all continuous with relevant radio port by wireless channel.Fig. 4 represents a such example, and promptly subscriber unit 10
1With subscriber unit 10
2All by wireless channel and radio port 20
1Link to each other.Radio port 20
1, 20
2,---, link to each other with radio port controller 30 by circuit.Equally, this radio port controller 30 link to each other with communication network (not being shown specifically).
Each of subscriber unit all is made of the mobile radio station that docks with the user.Each wave point control is arranged in each subscriber unit of the wireless zone of relevant interface, thereby data can send/receive between subscriber unit and wave point controller 30.Wave point controller 30 will send to communication network from the data that each wave point receives, and will send to wave point from the data that communication network provides equally.
Each wave point 20
1, 20
2.... all constitute by data generating portion 21, transmission part 22, receiving unit 23 and fault processing part 24.Data generating portion 21 produces SYN data, first data, second data, the first cyclic redundancy numeric data code and power control data.Send part 22 and will send to subscriber unit 10 by synchronizing channel SYNC by the SYN data that generating portion 21 produces, to send to subscriber unit 10 by Fast Channel FC by first data that generation unit 21 produces, will send to subscriber unit 10 by second data that generating portion 21 produces by low rate channel SC equally.Therefore, send part 22 and will send to subscriber unit 10, and will send to subscriber unit 10 by power control channel by the power control data that generating portion 21 produces by the cyclic redundancy code CRC that generating portion 21 produces.
Receiving unit 23 receive the data of sending by subscriber unit 10 by the SYNC channel and set up thus with time slot synchronously.Equally, receiving unit 23 receives the 3rd data of sending from subscriber unit 10 by Fast Channel FC, and receives the 4th data of sending from subscriber unit 10 by low rate channel SC.Therefore, receiving unit 23 receives second cyclic redundancy code that sends from subscriber unit 10, receives the power control data that sends from subscriber unit by power control unit.
Each subscriber unit 10
1, 10
2,---all constitute by data generating portion 11, transmission part 12, receiving unit 13 and fault processing part 14.Data generating portion 11 produces SYN data, the 3rd data, the 4th data, the second cyclic redundancy code CRC and power control data.Send part 12 and will send to wave point 20 by synchronizing channel SYNC by the SYN data that data generating portion 11 produces, to send to wave point 20 by Fast Channel FC by the 3rd data that data generating portion 11 produces, will send to wave point 20 by low rate channel SC by the 4th data that data generating portion 11 produces equally.Therefore, send part 12 and will send to wave point 20, will send to wave point 20 by low rate channel by the power control data that data generating portion 11 produces by second cyclic redundancy code that data generating portion 11 produces.
Receiving unit 13 receives the SYN data of sending by synchronizing channel SYNC from wave point 20, thereby sets up the synchronous of time slot.Equally, receiving unit 13 receives the rapid data that sends from wave point 20 by Fast Channel FC, and receives second data of sending from wave point 20 by low rate channel SC.Therefore, receiving unit 13 receives first cyclic redundancy code that sends from wave point 20, receives the power control data that sends from wave point by power control channel.
With reference now to Fig. 5 A and 5B, the operation that is used in the PACS system in the above-mentioned structure is described in detail.In the flow chart of this operation, at subscriber unit 10
1With 10
2Between carry out the communication of phone.Need clear and definite to be, can use data by low rate channel SC transmissions/receptions to be called as and expand CRC function (ECRC function) as the new function of the part of cyclic redundancy code.
At first, wave point 20
1Check wave point 20
1So-called " expansion CRC function (ECRC function) " (step S10) whether be equipped with.When wave point 20
1Judge when being equipped with expansion CRC function this wave point 20
1SIC broadcasts (step S11) with this check result by the using system information channel.Opposite, when not being equipped with expansion CRC function, the PACS operating sequence is branched to step S14.Need clear and definite to be, the operation that is limited at this step S11 is preferably in each preset time cycle and is performed.
When power supply is switched on, subscriber unit 10
1Check self user 10
1Expansion CRC function (step S20) whether is equipped with.When subscriber unit 10
1Judge self subscriber unit 10
1When being equipped with expansion CRC function, this subscriber unit 10
1Check and whether used this expansion CRC function (step S21).In the case, when subscriber unit 10
1Judge by subscriber unit 10
1Guidance panel when carrying out this expansion CRC function (ECRC), this subscriber unit 10
1To use the request of this ECRC function to send to wave point 20
1(step S22).Use the request of ECRC to send, and this original access signal is by from subscriber unit 10 by utilizing original access signal
1In first accessing operation, send to wave point 20
1
Receive the wave point 20 of original access signal
1Check and whether sent the request (step S12) of using expansion CRC function.Then, when wave point 20
1Judge when having sent the request of using this CRC function wave point 20
1Internal state be set to a kind of like this mode, promptly handle the SC field (step S13) of using the pattern shown in Fig. 3 in the operation in following transmission/reception.Then, carry out this transmission/reception processing procedure (step S15).Its result uses Fast Channel FC at self wave point 20
1With subscriber unit 10
1Between carry out the transmission/reception of data, use the content that produces new cyclic redundancy code NCRC by Extended Cyclic redundant code and cyclic redundancy code CRC are combined as new cyclic redundancy code NCRC simultaneously, check the correctness of these data.
On the other hand, step S10 wave point 20 in front
1Judge self wave point 20
1When not being equipped with expansion CRC function, and therefore judging at step S12 and do not send the request of using expansion CRC function, wave point 20
1Internal state be set to a kind of like this state, promptly in following transmission/reception operating process, use the transmission data pattern (step S14) of the low rate channel of Fig. 2.Then, carry out this transmission/receiving course operation (step S15).Its result is by using Fast Channel at self wave point 20
1With subscriber unit 10
1Between carry out the transmission/reception of data, use cyclic redundancy code CRC simultaneously, check the correctness of these data.
Be noted that wave point 20 when receiving the original access signal that comprises the request of using the ECRC function
1When not being equipped with this ECRC function, this wave point 20
1Delete this received original access signal.On the other hand, sent the subscriber unit 10 of the original access signal that comprises the request of using the ECRC function
1Be placed into wait state, thereby wait for from wave point 20
1Corresponding (the step S23) that sends.Even when this subscriber unit 10
1Wait in cycle when corresponding at a preset time, if from wave point 20
1Do not send response, then this subscriber unit 10
1It is overtime to be checked through the time, after this will not comprise request and use the original access signal of ECRC function to send to wave point 20
1(step S24).Its result, this wave point 10
1Internal state be set to a kind of like this mode, promptly in the operation of back, use the transmission data pattern of the low rate channel SC shown in Fig. 2.
Judge self subscriber unit 10 at subscriber unit at above-mentioned step S20
1When not being equipped with expansion CRC function, and superincumbent step S21 judges self subscriber unit 10
1When not using expansion CRC function, this process operation is switched to step S24 in proper order.Then, subscriber unit 10
1Internal state be set to a kind of like this mode, promptly in following transmission/receiving course, use the transmission data pattern of the low rate channel SC shown in Fig. 2.
Then, carry out this transmission/reception operating process (step S26) at subscriber unit.Its result is by using Fast Channel FC at self wave point 20
1With subscriber unit 10
1Between carry out the transmission/reception of data, use following transmission/receiving course operation simultaneously, check the correctness of these data.
Then, with the operation that is described under the following situation, wherein subscriber unit 10
1With wave point 20
1All from first kind of recovering state to the second kind of state, described first kind of state has been to use the transmission data pattern of the low rate channel SC shown in Fig. 3, and second kind of state has been to use the transmission data pattern of the low rate channel SC shown in Fig. 2.
When subscriber unit 10
1Or wave point 20
1When need using the traditional transmission data pattern of the low rate channel shown in Fig. 2, be set to logical one, then the data that obtained sent to computer installation at " r " shown in Fig. 3-sign.Receiving wherein " r " sign when being set in the computer installation of this pulse signal of sign " 1 ", similarly logical one is set to " r " and indicates.By carrying out above-mentioned operating process, data can be sent/receive from follow-up data transmission/reception by low rate channel by traditional mode.
Though in conjunction with illustrated embodiments the present invention is described in detail, the present invention is not limited to this, to modifications and variations of the present invention all within the spirit and scope of the present invention.
For example, as to known in the field, the ratio of the figure place of cyclic redundancy code CRC and signal figure place is high more, and is high more by using cyclic redundancy code CRC to carry out the ability of error detection and/or correction.In traditional PACS system, device as Fig. 1, Fig. 2 and Fig. 3, can find out very clearly that the figure place of cyclic redundancy code and the ratio of signal figure place are 1/6, near equal 0.17 carry out error detection and/or error correction because be by using with respect to 15 the cyclic redundancy CRC that adds up to 90 (i.e. 80 Fast Channel FC and 10 s' low rate channel SC).Opposite, in PACS according to the present invention system, the ratio of the figure place of cyclic redundancy code and signal figure place equals 22/80, promptly 0.275, because be that sum with respect to 22 uses 22-position cyclic redundancy code, promptly 15 cyclic redundancy code CRC and 7 s' low rate channel SC carries out error detection and/or error correction corresponding to 80 of Fast Channel FC.Its result can improve the quality of the telephonic communication in the PACS system.
Claims (14)
1. individual access communication system that is used for being undertaken by Fast Channel and low rate channel communication between wave point (20) and subscriber unit (10) is characterized in that described wave point (2) comprises:
Data generating portion (21), be used to produce first data, second data and be used for detecting mistake and be used for error recovery first cyclic redundancy code;
Send part (22), be used for described first data that described data generating portion (21) produces being sent to described subscriber unit (10) by described Fast Channel, be used for to send to described subscriber unit (10) by described second data that described data generating portion (21) produces, and described first cyclic redundancy code that is used for being produced by described data generating portion (21) sends to described subscriber unit (10) by described low rate channel;
Receiving unit (23), be used for receiving the 3rd data that send by described subscriber unit (10) by described Fast Channel, be used for receiving the 4th data that send by described subscriber unit (10) by described low rate channel, and be used for receiving second cyclic redundancy code that sends from described subscriber unit (10); And
Fault processing part (24) is used for according to described the 4th data that received by described receiving unit (23) with by described second cyclic redundancy code that described receiving unit (23) receives described the 3rd data that received by described receiving unit (23) being carried out error detection and error correction;
Wherein said subscriber unit (10) comprising:
Data generating portion (11), be used to produce described the 3rd data, the 4th data and be used for detecting mistake and be used for error recovery described second cyclic redundancy code;
Send part (12), be used for to send to described wave point (20) by described the 3rd data that described data generating portion (11) produces by described Fast Channel (21), be used for to send to described wave point (20) by described the 4th data that described data generating portion (11) produces, and described second cyclic redundancy code that is used for being produced by described data generating portion (11) sends to described wave point (20) by described low rate channel;
Receiving unit (13), be used for receiving first data that send by described wave point (20) by described Fast Channel, be used for receiving second data that send from described wave point (20) by described low rate channel, and be used for receiving the described cyclic redundancy code that sends from described wave point (20); And
Fault processing part (14) is used for according to described second data that received by described receiving unit (13) with by described first cyclic redundancy code that described receiving unit (13) receives described first data that received by described receiving unit (13) being carried out error detection and error correction.
2. individual access communication system according to claim 1 is characterized in that:
The described data generating portion (21) of described wave point (20) has only just produce the described second described data that comprise the first Extended Cyclic redundant code that will combine with described first cyclic redundancy code when using Fast Channel, and
The described fault processing part (14) of described subscriber unit (10) uses new cyclic redundancy code that described first data that received by described receiving unit (13) are carried out error detection and error correction, wherein said new cyclic redundancy code is to combine and produce by described first cyclic redundancy code that will be received by described receiving unit (13) with by the described first Extended Cyclic redundant code in described second data of being included in that described receiving unit (13) receives, and
The described data generating portion (11) of wherein said subscriber unit (10) has only produce described the 4th data that comprise the second Extended Cyclic redundant code that will combine with described second cyclic redundancy code when using Fast Channel; And
The described fault processing part (24) of described wave point (20) is by carrying out error detection and error correction with new cyclic redundancy code to described the 3rd data that received by described receiving unit (23), and wherein said new cyclic redundancy code is by combining and produce by described second cyclic redundancy code of described receiving unit (23) reception with by the described second Extended Cyclic redundant code in described the 4th data of being included in of described receiving unit (23) reception.
3. individual access communication system according to claim 2 is characterized in that being comprised by described second data that the described data generating portion (21) of wave point (20) produces:
The described first Extended Cyclic redundant code that combines with described first cyclic redundancy code;
The recovery request sign, be used for returning to second mode of operation from first mode of operation of described low rate channel, wherein carry out the transmission of the described first Extended Cyclic redundant code, and do not carry out the transmission of the described first Extended Cyclic redundant code in second mode of operation in first mode of operation;
Fixed data, its time slot that is used to represent to carry out that described first data send is not empty; And
Be used to limit the sign of the kind of the data that send by described Fast Channel;
Wherein described the 4th data that produced by described data generating portion (11) comprise:
The described second Extended Cyclic redundant code that combines with described second cyclic redundancy code;
The recovery request sign, be used for returning to second mode of operation from first mode of operation of described low rate channel, wherein carry out the transmission of the described second Extended Cyclic redundant code, and do not carry out the transmission of the described second Extended Cyclic redundant code in second mode of operation in first mode of operation;
Fixed data, its time slot that is used to represent to carry out that described the 3rd data send is not empty; And
Be used to limit the sign of the kind of the data that send by described Fast Channel.
4. individual access communication system according to claim 3, it is characterized in that when finish by described send that part (22) carried out to the transmission of described first data time, described wave point (20) changes described second data, is empty with expression by the described time slot that is used for transmit operation that sends part (22) use, and
When finish by described send that part (12) carried out to the transmission of described first data time, described subscriber unit (10) changes described second data, and to send the time slot that is used for transmit operation that part (12) uses be empty by described with expression.
5. individual access communication system according to claim 3 is characterized in that described wave point (20) comprises:
Broadcast segment is used to broadcast the information that can use described low rate channel in first mode of operation, wherein carries out the transmission of described first Extended Cyclic redundant code and the described second expansion redundant code in described first mode of operation.
6. individual access communication system according to claim 2, it is characterized in that described wave point (20) is first mode of operation with the Working mode set of described low rate channel, in first mode of operation, carry out the transmission of the described first Extended Cyclic redundant code corresponding to the indication of the original access signal that sends from described subscriber unit (10).
7. individual access communication system according to claim 2, it is characterized in that described subscriber unit (10) produces original access signal, the Working mode set that is used for described low rate channel is first mode of operation, carry out the transmission of described first Extended Cyclic redundant code and the described second Extended Cyclic redundant code in the indication that first mode of operation provides corresponding to the outside, then described original access signal is sent to described wave point (20).
8. means of communication of using in individual access communication system are used for carrying out communication by Fast Channel and low rate channel between wave point (20) and subscriber unit (10), and the described means of communication comprise:
(a1) produce first data, second data by described wave point (20) and be used to detect first cyclic redundancy code of mistake and error recovery;
(b1) described first data are sent to described subscriber unit (10) by described Fast Channel from described wave point (20);
(c1) described second data are sent to described subscriber unit (10) by described low rate channel from described wave point (20);
(d1) described cyclic redundancy code is sent to described subscriber unit (10) from described wave point (20);
(e1) receive described first data, described second data and described first cyclic redundancy code that sends from described wave point (20) by described subscriber unit (10); And
(f1) according to described second data and described first cyclic redundancy code described first data are carried out error detection and error correction by described subscriber unit (10); And
(a2) produce the 3rd data, the 4th data by described subscriber unit (10) and be used to detect second cyclic redundancy code of mistake and error recovery;
(b2) described the 3rd data are sent to described wave point (20) by described Fast Channel from described subscriber unit (10);
(c2) described the 4th data are sent to described wave point (20) by described low rate channel from described subscriber unit (10);
(d2) described second cyclic redundancy code is sent to described wave point (20) from described subscriber unit (10);
(e2) receive described the 3rd data, described the 4th data and described second cyclic redundancy code that sends from described subscriber unit (10) by described wave point (20); And
(f2) according to described the 4th data and described second cyclic redundancy code described the 3rd data are carried out error detection and error correction by described wave point (20).
9. the means of communication that are used in the individual access communication system according to claim 8 is characterized in that described generation step (a1) comprises:
Only when using described Fast Channel, producing described second data that comprise the first Extended Cyclic redundant code that to combine with described first cyclic redundancy code by described wave point (20); And
Use new cyclic redundancy code to carry out error detection and error correction by described subscriber unit (10) to described first data, wherein new cyclic redundancy code is by with described first cyclic redundancy code be included in the described first Extended Cyclic redundant code in described second data and combine and form, and
Wherein said generation step comprises:
When using Fast Channel, produce described the 4th data by described subscriber unit (10), wherein said the 4th data comprise the second Extended Cyclic redundant code that will combine with described second cyclic redundancy code; And
By described wave point (20) described the 3rd data are carried out error detection and error correction by using new cyclic redundancy code, wherein new cyclic redundancy code is to form by described second cyclic redundancy code is combined with the described second Extended Cyclic redundant code in being included in described the 4th data.
10. the method that is used in the individual access communication system according to claim 9 is characterized in that described second data comprise:
The described first Extended Cyclic redundant code that combines with described first cyclic redundancy code;
The recovery request sign, be used for returning to second mode of operation from first mode of operation of described low rate channel, wherein carry out the transmission of the described first Extended Cyclic redundant code, and do not carry out the transmission of the described first Extended Cyclic redundant code in second mode of operation in first mode of operation;
Fixed data, its time slot that is used to represent to carry out that described first data send is not empty; And
Be used to limit the sign of the kind of the data that send by described Fast Channel;
Wherein said the 4th data comprise:
The described second Extended Cyclic redundant code that combines with described second cyclic redundancy code;
The recovery request sign, be used for returning to second mode of operation from first mode of operation of described low rate channel, wherein carry out the transmission of the described second Extended Cyclic redundant code, and do not carry out the transmission of the described second Extended Cyclic redundant code in second mode of operation in first mode of operation;
Fixed data, its time slot that is used to represent to carry out that described the 3rd data send is not empty; And
Be used to limit the sign of the kind of the data that send by described Fast Channel.
11. the means of communication that are used in the individual access communication system according to claim 10, it is characterized in that when described step (a1) is included in the transmission of finishing described first data that changing time slot that described second data are used for transmit operation with expression by described wave point (20) is sky, reaches
Changing described the 4th data by described subscriber unit (10) when described step (a2) is included in the transmission of finishing described the 3rd data is empty with the time slot that expression is used for transmit operation.
12. the communication system that in individual access communication system, uses according to claim 9, it is characterized in that also comprising the information that in first operator scheme, can use low rate channel by described wave point broadcasting, in first mode of operation, carry out the transmission of described first Extended Cyclic redundant code and the described second Extended Cyclic redundant code.
13. the means of communication that are used in the access communication system according to claim 9, it is characterized in that also comprising by described wave point (20) is first mode of operation with the Working mode set of described low rate channel, carries out the transmission of described first Extended Cyclic redundant code and the described second Extended Cyclic redundant code corresponding to the indication of the original access signal that sends from described subscriber unit (10) in first mode of operation.
14. the means of communication that are used in the individual access communication system according to claim 9, it is characterized in that also comprising the Working mode set that is used for described low rate channel by described subscriber unit (10) generation is first mode of operation, the transmission of described first Extended Cyclic redundant code and the described second expansion redundant code is carried out in the indication that provides corresponding to the outside in first mode of operation, then described original access signal is sent to described wave point (20).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP122694/98 | 1998-04-17 | ||
| JP12269498A JP3107043B2 (en) | 1998-04-17 | 1998-04-17 | Personal access communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1233143A true CN1233143A (en) | 1999-10-27 |
Family
ID=14842311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99105573 Pending CN1233143A (en) | 1998-04-17 | 1999-04-14 | Personal access communication system and communication method in personal access communication system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3107043B2 (en) |
| CN (1) | CN1233143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098211B (en) * | 2005-06-30 | 2012-01-25 | 株式会社日立制作所 | Sending control device, receiving control device, and communication system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3795743B2 (en) | 2000-11-17 | 2006-07-12 | 株式会社エヌ・ティ・ティ・ドコモ | Data transmission method, data transmission system, transmission device and reception device |
-
1998
- 1998-04-17 JP JP12269498A patent/JP3107043B2/en not_active Expired - Fee Related
-
1999
- 1999-04-14 CN CN 99105573 patent/CN1233143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098211B (en) * | 2005-06-30 | 2012-01-25 | 株式会社日立制作所 | Sending control device, receiving control device, and communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3107043B2 (en) | 2000-11-06 |
| JPH11308660A (en) | 1999-11-05 |
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