CN1121765C - Time-division multiple access (TDMA) multi-line wireless telephone system - Google Patents
Time-division multiple access (TDMA) multi-line wireless telephone system Download PDFInfo
- Publication number
- CN1121765C CN1121765C CN98813602A CN98813602A CN1121765C CN 1121765 C CN1121765 C CN 1121765C CN 98813602 A CN98813602 A CN 98813602A CN 98813602 A CN98813602 A CN 98813602A CN 1121765 C CN1121765 C CN 1121765C
- Authority
- CN
- China
- Prior art keywords
- mobile phone
- timeslice
- tdma
- sampling
- phone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
A wireless telephone system comprises a base unit coupleable to one or more external telephone lines and having a base transceiver, and a plurality of wireless handsets which may be active or inactive. Each handset has a handset transceiver for establishing a time-division multiple access (TDMA) link, when said handset is active, over a shared RF channel with the base unit via the base transceiver. In communicating via a TDMA link, each active handset communicates during an exclusive time slice of a TDMA scheme that allocates time slices to active handsets, wherein a number of data samples having a sample size are transmitted during each time slice. At least two handsets alternatingly share a time slice, when one of said two handsets is to establish a new TDMA link and when establishing said new TDMA link would exceed the available channel capacity. Time slices are shared by reducing the sample size and thereby increasing the number of data samples transmitted during said shared time slices.
Description
Background of invention
TECHNICAL FIELD OF THE INVENTION
The present invention relates to multi-line wireless phone system.
Description of Related Art
The use of phone and telephone system (comprising radio telephone system) has been very widely.In radio telephone system, communicate by letter with an elementary cell that typically is connected to an external telephone network by a standard phone line by the analog or digital wireless signal in a wireless or radio mobile telephone set unit.By this way, the user can use wireless phone to carry out telephone relation by elementary cell and telephone network and another user.
Multi-line wireless phone system also is used to various situations, such as the commercial location that many telephone subscribers are arranged.This system usually adopts the digital communication scheme that inserts (TDMA) such as time division multiple access, uses one with reach N the mobile phone that mobile phone is communicated by letter simultaneously.Hope realizes the characteristic of current private branch exchange (PBX) in a multi-line wireless phone system.Conventional multi-line wireless phone system must be worked in a designated bandwidth and modulation format usually, has so just limited the heap(ed) capacity that is used for sending between mobile phone elementary cell and work or that activate radio frequency (RF) channel of signal.
By the fixing obtainable capacity of this telephone system or the caused problem of inalterability of bandwidth and this system be: when not all mobile phone all in operation the time, obtainable channel capacity can not be used effectively.This be because, in some such systems, if necessary, then the selected channel capacity is so that all N mobile phone can be operated simultaneously, such system for example discloses in european patent application No.0587225A2.But when being less than N mobile phone operation, channel capacity just can not fully be used.Can reduce overall signal quality, so that reduce total bandwidth (with thus reduce the part of when not all mobile phone all is used, being wasted), but this has unnecessarily reduced quality in some cases, for example when having only a mobile phone when operating and having enough obtainable overall channel capacity to allow the high quality communication of this single mobile phone.
Brief summary of the invention
Radio telephone system comprise one can be connected to one or more external call line and have a basic transceiver elementary cell and a plurality of may be to activate or unactivated wireless phone.Each mobile phone has a handset transceiver, is used for setting up a time division multiple access by basic transceiver and elementary cell on a shared RF channel when this mobile phone activates and inserts (TDMA) link.By in the communication of a TDMA link, the mobile phone of each activation is communicated by letter in a special-purpose timeslice of timeslice being distributed to the TDMA scheme that Activates Phone, and wherein a plurality of sampling of datas that have the value of sampling are sent out in each timeslice.Will set up a new TDMA link and set up described new TDMA link will exceed obtainable channel capacity the time when one in two mobile phones, these two mobile phones are alternately shared a timeslice at least.Thereby be increased in the quantity of the sampling of data that sends in this shared timeslice by the value that reduces to sample, can share timeslice.
The time summary
Fig. 1 is the block diagram according to the TDMA multi-line wireless phone system of embodiment of the present invention;
Fig. 2 is the schematic description of structure of territory, packet and packets of voice of TDMA scheme that is used for the system of Fig. 1;
Fig. 3 is that explanation is according to the table of embodiment of the present invention by the varistructure TDMA timeslice allocative decision of system's use among Fig. 1; And
Fig. 4 is that explanation is according to the table of embodiment of the present invention by the fixed structure TDMA timeslice allocative decision of system's use among Fig. 1.
The preferred embodiment of invention is described
Referring now to Fig. 1,, provided a block diagram among the figure according to the TDMA multi-line wireless phone system 100 of embodiment of the present invention.Tdma system 100 comprises an elementary cell 110 that receiver and transmitter unit 112 and 111 are arranged respectively, and is connected to an external electric phone network 116 by telephone wire 115.Elementary cell 110 also has a controlled microprocessor 113 that is used to control and monitor the repertoire of elementary cell 110.System 100 also comprises N wireless phone 120
1, 120
2... 120
NEach all has a transmitter and acceptor unit (transceiver), and for example mobile phone 120
1Transmitter 121 and receiver 122.In one embodiment, acceptor unit 112 comprises N independently logic receiver, transmitter unit 111 comprises N independently logic transmitter, and receiver and transmitter unit 112 and 111 provide N logic transceiver unit altogether like this, and each correspondence is one in N the wireless phone.At any given time, M mobile phone (0≤M≤N) operate (promptly being among the process of carrying out a call).Because mobile phone all is that battery provides power supply usually, so for a wireless system, effective use of power supply is very important.Therefore, in one embodiment, system 100 uses a digital TDMA scheme, as what below will describe in further detail, because each mobile phone is " cutting out " (promptly not sending or receive data) in the most of the time, and only in its oneself " timeslice " or time slot " start ", so this scheme makes power supply to be used effectively.System 100 is just in the base station 110 and each mobile phone 120 like this
i(provide a wireless network between 1≤i≤N).
In the present invention, adopt a kind of TDMA scheme can allow obtainable channel capacity more effectively to be used.When the mobile phone of specific quantity is in the operation, this be by the signal quality that reduces two or more mobile phones and make they alternately each other timeslice realize, as what further describe below with reference to Fig. 2-4.
Referring now to Fig. 2,, wherein provided the TDMA scheme of the tdma system 100 that is used for Fig. 1 territory, packet and packets of voice structure schematically show 200.In one embodiment, the territory 210 of one 2 milliseconds numerical data comprises nine groupings altogether, i.e. data grouping 220 and such as 8 packets of voice of packets of voice 230.Each packet is one group of data that send or send in the other direction to given mobile phone from elementary cell in a discrete timeslice, does not have this moment other mobile phone to receive or send data on the data channel of system.Each packets of voice is the speech data that sends or send in the other direction to given mobile phone from elementary cell in one group of given timeslice in whole " cycle (epoch) " scheme, does not have this moment other mobile phone to receive or send data on the data channel of system.
Just as described, every type grouping all contains each subdomain or section.For example, packet 220 comprises one 32 bit synchronous territory 222, data field 235, FEC (forward error correction) territory 222 and a guard time 223.Data in the packet 220 are used to communicate by letter between elementary cell and a special mobile phone, and comprise various types of information, for example caller ID type information, scope and power information etc.
Packets of voice 230 comprises a packets of voice 231, FEC data segment 232 and guard time 233.For example, packets of voice 231 comprises identification packets of voice (for example mobile phone), the information such as current location in this cycle.
In normal running, each mobile phone is distributed to 16 digital compressed voices sampling of each timeslice reception (for example ADPCM (adaptive difference pulse code modulation) sampling) that this mobile phone is used for receiving speech data in this cycle; And in this cycle, distribute to each timeslice that this mobile phone is used for sending speech data and send 16 ADPCM sampling to elementary cell.Yet, in the present invention, when channel capacity being had the mobile phone that is in too much in the operation need carry, each can be by alternately its use to mobile phone, and sample size is doubled to 32 sampling of each timeslice (by reducing the quality of each sampling) shares a timeslice.ADPCM and correlation technique problem in the suggestion of International Telecommunication Union G.727, " the adaptive difference pulse code modulation (ADPCM) that 5,4,3 and 2 bit samplings embed " of (12/1990) is described in detail among the http://www.itu.ch.
Like this, packets of voice 230 also comprises master's 64 bits " speech data " part, and it comprises 16 4 bit A PCM sampling (high-quality), or 32 2 bit A PCM sampling (low quality).The latter be when the mobile phone of operating can high quality operation on more than the maximum channel capacity that is assigned with in system 100 mobile phone the time situation.Like this, in the present invention, (call out in position) when operating when being less than T mobile phone, the mobile phone in each operation can be with high quality operation, and wherein M≤T and maximum channel capacity are enough to handle simultaneously nearly individual high-quality calling of T or link.Yet, when (M＞when T) mobile phone is in operation, the right channel of chosen mobile phone is by timeslice from the high-quality speech link switchover to the low quality voice link and alternately more than T.Be to be understood that, for 2 milliseconds of territories, situation provides 32K bps ADPCM (default speech data) to high-quality (16 4 bit A PCM sampling of each packets of voice or timeslice), and low quality (each packets of voice is shared 32 2 bit samplings between two mobile phones) situation provides 16K bps.
Like this, in limiting case, the maximum handset capacity when this embodiment of the present invention allows high-quality doubles when low quality.In an embodiment of system 100, nearly 4 mobile phones can be called out simultaneously with high-quality, and nearly 8 mobile phones can be called out simultaneously with low quality.For number placed in the middle, each after increase, surpass outside 4 mobile phones mobile phone all must with initial 4 mobile phones in one (for example partner, if M=7 then also has 3 outside 4 initial mobile phones, thereby in 7 mobile phones 3 * 2=6 is with the low quality operation).
Referring now to Fig. 3,, wherein provided table 300, it illustrates according to one embodiment of the invention, by the varistructure TDMA timeslice allocative decision cycle of 100 uses of system among Fig. 1.Table 300 comprises N to row, the corresponding a pair of row of each existing mobile phone.Every row is a territory, for example territory among Fig. 2 210.In the varistructure scheme of table 300, N can be greater than 8.For example, N can be 12.Each row or territory in cycle all can be known as initial time sheet or time slot here, and it is used to send data (TD) and gives given mobile phone or receive data (RD) from given mobile phone.Therefore, the beginning in the territory, data are sent (or reception) by the mobile phone from an appointment.Like this, for example elementary cell 110 is expert at and is sent data to the mobile phone #1 (mobile phone 120 of Fig. 1 for example in first timeslice of TD1
1); And elementary cell 110 is expert at and is received data from mobile phone #1 in first timeslice of RD1.Thereby each mobile phone receives data and sends data in the timeslice of whole Q timeslice in the cycle, wherein Q=9 * 2 * N.Like this, although can increase N mobile phone of any amount, at given mobile phone 120
1And therefore the time delay of the data communication between the elementary cell 110 is lengthened out.This can cause long time delay or stand-by period when for example making a given cell-phone bell or notified calling subscriber's id information.
In operation, given mobile phone the inquiry of its predetermined data channel time slot from elementary cell 110 go into to call out and synchrodata, and when its initiates a calling, in its predetermined data channel time slot, send packets of voice.The packets of voice in each territory 210 (each row of table 300) is to (for example, TS1, RS1) two dialogues (referring to ITU Rec.G.727) that can support to use the dialogue of 32K bps ADPCM or use 16K bps ADPGM.In this embodiment, for a mobile phone, per 2 milliseconds are transmitted 16 4 bit samplings on each direction.Be noted that table 300 expression from left to right, from top to bottom, 2 milliseconds of levels, the time series of vertical 2 * 2 * N millisecond (for N=8, then=32 millisecond).
In one embodiment, the cycle of system's 100 following realization tables 300.The channel capacity of system 100 is enough to allow the nearly high quality operation of T=4 mobile phone.Like this, for 4 mobile phones that enter operation at first, they are assigned to nominal from 1 to 4 number.Since each timeslice of table 300 all be circulation (from left to right, from top to bottom), so two right provisional capitals of each row use TD capable in by top entry, i.e. the not distribution shown in the clauses and subclauses in round parentheses.Like this, we have just had following sequence:
TD1，TS1，RS1，TS2，RS2，TS3，RS3，TS4，RS4；
RD1，TS1，RS1，TS2，RS2，TS3，RS3，TS4，RS4；
TD2，TS1，RS1，TS2，RS2，...
RDN，TS1，RS1，TS2，RS2，TS3，RS3，TS4，RS4；
Wherein, " TS1 " represents that wherein elementary cell 110 is to the timeslice of mobile phone #1 transmission voice signal or " sound " grouping; " RS1 " represents that wherein elementary cell 110 is from the timeslice of mobile phone #1 reception packets of voice, by that analogy.
Yet each packets of voice timeslice clauses and subclauses of table 300 comprise two clauses and subclauses.The top entry in the capable or territory of TD is according to showing when the M≤T, for " normally " distribution of the capable time slot of TD and RD.It is capable that this distribution is used to row right TD and RD.For example, if having only 4 mobile phones to activate (off-hook), then above-described sequence is just followed, promptly TD and RD provisional capital follow by TD capable in the indicated sequence of clauses and subclauses at top.
Bottom entries in the round parentheses has been indicated the alternate allocation of time slot when M＞T.The normal alternate allocation of top entry indication time slot when M＞T.If the 5th mobile phone (mobile phone #5) begins operation, do not handle all 5 mobile phones that activate or operate with high-quality with regard to there being enough channel capacities.Therefore, mobile phone 1 and 5 is alternately being shared a timeslice in the territory, and the sample size that each packets of voice will send in this timeslice doubles.For example, in this case, in first packets of voice timeslice of the TD1 that is expert at, clauses and subclauses TS1 indication has 32 2 bit voice ADPCM sampling to be sent to mobile phone #1, rather than 16 4 common bit samplings.In first packets of voice timeslice of RD1 of being expert at, clauses and subclauses TS5 indication has 32 2 bit voice ADPCM sampling to be sent to mobile phone # 5 in this timeslice.In packets of voice, 32 2 bit A PCM sampling is provided and provides enough speech datas for one 4 milliseconds TDMA cycles for mobile phone 1.System is dynamic, and this is because if mobile phone #1 was hung up before mobile phone # 5, and then elementary cell can be distributed to the remaining time that mobile phone # 5 is used for its calling with 32K bps.Its order can depend on that when mobile phone # 5 becomes activation and change, and the clauses and subclauses in the round parentheses are applicable like this.
Therefore, when M＞T, system 100 can be described as and operates in the mobile phone mode of extension.In normal mode, per two territories always have 32 4 bit samplings and are sent to mobile phone #1 (being that high-quality TS1 takes place twice).In the mobile phone mode of extension, the sampling of 32 2 bits (low weight) in per two territories still is sent to mobile phone #1, unless this is to realize in a single packets of voice rather than in two packets of voice.Owing to outside 4 initial mobile phones, have other mobile phone to be activated, so system 100 dynamically switches to the mobile phone mode of extension, and as described, the mobile phone of new activation is carried out nominal numbering, then as described, the mobile phone of activation newly and the timeslice of other mobile phone are matched.Therefore, if for example mobile phone #6 becomes activation, then it and mobile phone # 2 share timeslice alternately (and reduced mobile phone # 2 quality).In this case, we have:
TD1，TS1，
*RS1，
*TS2，
*RS2，
*TS3，RS3，TS4，RS4；
RD1，TS5，
*RS5，
*TS6，
*RS6，
*TS3，RS3，TS4，RS4；
TD2，TS1，
*RS1，
*TS2，
*RS2，
*TS3，RS3，...
RDN, TS5,
*RS5,
*TS6,
*RS6,
*TS3, RS3, TS4, RS4 wherein, low quality packets of voice (i.e. 2 bit samplings) represented in asterisk.
Like this, elementary cell 110 will send with receiving slot and distribute to each mobile phone that activates subsequently to be used for voice transfer.If there is not mobile phone to be in use, and mobile phone 120
2Begin a calling, then send and receiving slot TS1 and RS1 just are provided for mobile phone 120 with 32K bps speed
2(being mobile phone #1).Like this, for the mobile phone that reaches 4 activation, one high-quality 32K bps voice link just is provided for each mobile phone.Because the 5th mobile phone becomes activation, existing channel is multiplexed in this channel with 16K bps speed with regard to being reduced to 16K bps and the 5th mobile phone.If there is mobile phone more than 8 to attempt to send, their get clogged (all circuit busy signals) then.In the such embodiment that may block, acceptor unit 112 preferably comprises and is less than independently receiver (preferably 8) of N, and transmitter unit comprises and is less than N independently transmitter (preferably 8).Usually, in any embodiment, elementary cell 110 comprises its quantity, and to equal a plurality of logic transceivers of maximum quantity of the calling (link) that may set up simultaneously right.
Like this, in the cycle of table 300, under normal mode, the mobile phone of each activation has fixing time slot to be used for the speech data transmission for each territory 210 (i.e. the row of table 300).In the extended mobile phone pattern, the low quality mobile phone transmits for there is fixing time slot to be used for speech data every a territory 210 (i.e. the row of table 300).
In one embodiment, can optimize the use of channel capacity dynamically for the mobile phone rename thereby system 100 is carried out adjustment.For example, suppose that 6 mobile phones operate as the above, then 4 in 6 mobile phones operate with the low quality pattern.Next, suppose that mobile phone #3 and #4 withdraw from operation.In this point, allow mobile phone #1 and #5 share timeslice or just nonsensical with the operation of low quality pattern, because be used for TS3, RS3, TS4, the timeslice of RS4 is not being used.Like this, in this case, system 100 just dynamically is that 4 mobile phones in the operation renumber or rename and are #1-4.
Therefore, in the present invention, TDMA is used to data and voice are separated into two channels, and bandwidth is distributed to the mobile phone that needs channel on demand.This technology is consistent with the power savings agreement because one always can be obtained data channel will be used to signal and make a call to mobile phone.Specific time slot is provided for each mobile phone and transmits to be used for data, it be used to keep TDMA synchronously so that the transceiver of this mobile phone only in the timeslice of its appointment, communicate by letter.Because phone with battery operated, is very important so they only send and monitor in needs.
In one embodiment, one of system's 100 usefulness have the cycle and the scheme of the telephone system realization table 300 of 4 Plain Old Telephone Services (POTS) line (being line 115).Utilize the POTS line of four special uses, unless other mobile phone is carrying out online talk carrying out intercommunication carrying out meeting or some mobile phones are arranged if a plurality of mobile phones are arranged, a mobile phone can expect to have 32K bps performance.In an alternative embodiment, can use other line/mobile phone combination.
In the embodiment of Miao Shuing, used each voice data packet time slot right in the above corresponding to 2 transmission/receptions.In an alternative embodiment, can have still less in each data slot or more transmission/reception right.For example, the speech data sampling can further reduce qualitatively so that send more sampling in each packets of voice, thereby allows the mobile phone (for example 4) more than 2 to share a timeslice.Yet this may need more senior compression algorithm, and this algorithm will increase sizable delay to loop.Use ADPCM as described above can reduce the delay in the loop and simplify voice echoes and eliminate problem, and since 16K bps all shown identical delay with 32K bps algorithm, so carry out the conversion between the algorithm easily.
Referring now to Fig. 4,, wherein provided table 400, it illustrated according to the fixed structure TDMA timeslice allocative decision cycle of one embodiment of the invention by system's 100 uses of Fig. 1.In this embodiment, for increase extra mobile phone outside channel capacity for, flexibility is less.But, its realization is simpler than the varistructure method of table 300, and can not allow to block generation.
The scheme that the cycle regimen of explanation can be similar in the table 300 in the table 400 when N=8 realizes.In an embodiment of table 400, time slot is provided for each mobile phone for use in data and voice.Therefore, for example, if having only mobile phone #1 and #5 to activate, although can also obtain extra bandwidth or channel capacity, they each all operate with 16K bps ADPCM.Yet although this may not be a mode of using channel " the most effectively ", it allows to simplify the control to channel.In an alternative embodiment, system 100 can dynamically rename cell-phone number so that more effectively use obtainable bandwidth when the cycle of realization table 400.
Those skilled in the art will recognize that above-described wireless system in accordance with the principles of the present invention can be a cellular system, wherein elementary cell 110 represents one to be one of the sub-district in cellular radio network serving base station.
Be to be understood that, below not departing under the situation of the principle of the present invention of claim statement and scope, those skilled in the art can to top description and graphic extension be used to explain that the part of essence of the present invention carries out the various changes of details, content and arrangement.
Claims (19)
1. radio telephone system comprises:
(a) elementary cell (110) that can be connected to one or more external call line and have a basic transceiver (111,112);
(b) a plurality of can be to activate or unactivated wireless phone (120
1-120
N), each mobile phone has a handset transceiver, when this mobile phone activates, this handset transceiver is used for setting up a time division multiple access with elementary cell by basic transceiver on a shared RF channel and inserts (TDMA) link, wherein the mobile phone of each activation is communicated by letter in a timeslice timeslice being distributed to the TDMA scheme that Activates Phone, and wherein a plurality of sampling of datas that have a sampling value are sent out in each timeslice; And
(c) be used to allow at least two mobile phones alternately to share the device (113) of a timeslice, to set up a new TDMA link and set up this new TDMA link can surpass obtainable channel capacity the time when one in described at least two mobile phones, thereby be increased in the sampling of data quantity that is sent out in the described shared timeslice and realize sharing by reducing this sampling value.
2. the system of claim 1, wherein sampling of data is adaptive difference pulse code modulation (ADPCM) sampling, each ADPCM sampling has a plurality of bits.
3. the system of claim 1, wherein:
A plurality of mobile phones comprise just in time N wireless phone;
The TDMA scheme comprises one has N to send data line and N cycle that receives data line;
When not having mobile phone to share timeslice, the mobile phone of each activation can receive or send 16 4 bit A PCM sampling in each timeslice of this mobile phone; And
When at least two mobile phones were shared in described at least two mobile phones one timeslice, each in described at least two mobile phones was alternately shared in each of each mobile phone and is received or send 32 2 bit A PCM sampling in timeslice.
4. the system of claim 1, wherein:
The TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right; And
The mobile phone of each activation each cycle corresponding to each capable centering that transmits and receive data that Activates Phone, only receive data and send data once by data slot.
5. the system of claim 1, wherein the TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right, every row comprises a data field and is divided into the timeslice of specified quantity, and wherein the length in each territory is 2 milliseconds.
6. the system of claim 1, wherein the TDMA scheme is a variable TDMA scheme, wherein mobile phone quantity is more than the link maximum quantity that can set up on the channel.
7. the system of claim 1, wherein the TDMA scheme is a fixedly TDMA scheme, wherein mobile phone quantity equals the link maximum quantity that can set up on the channel.
8. the system of claim 1, wherein:
A plurality of mobile phones comprise 8 mobile phones;
Nearly 4 mobile phones can be activate and need not share timeslice; And
Nearly 8 mobile phones can activate by sharing timeslice.
9. the system of claim 1, wherein:
The TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right;
Each mobile phone all provides power supply by battery; And
The mobile phone of each activation is only started shooting in its timeslice in the cycle, and closes at other times.
10. at one an elementary cell (110) and a plurality of wireless phone (120 are arranged
1-120
N) radio telephone system in, wherein elementary cell can be connected to one or more external call line and have a basic transceiver (111,112), in a plurality of wireless phones each can be activation or unactivated, and each mobile phone comprises a handset transceiver (121,122), a kind of method comprises following steps:
(a) on a shared RF channel, for Activating Phone, each utilize handset transceiver to set up a TDMA link by basic transceiver and elementary cell, wherein the mobile phone of each activation is communicated by letter in a special-purpose timeslice timeslice being distributed to the TDMA scheme that Activates Phone, and wherein a plurality of sampling of datas that have the value of sampling send in each timeslice; And
(b) to set up a new TDMA link and set up this new link can surpass obtainable channel capacity the time when one at least two mobile phones, allow described at least two mobile phones alternately to share a timeslice, thereby realize sharing by the quantity that the value that reduces to sample is increased in the sampling of data that is sent out in the described shared timeslice.
11. the method for claim 10, wherein sampling of data is adaptive difference pulse code modulation (ADPCM) sampling, and each ADPCM sampling has a plurality of bits.
12. the method for claim 10, wherein:
A plurality of mobile phones comprise just in time N wireless phone;
The TDMA scheme comprises one has N to send data line and N cycle that receives data line;
When not having mobile phone to share timeslice, the mobile phone of each activation receives or sends 16 4 bit A PCM sampling in each timeslice of this mobile phone; And
When at least two mobile phones were shared in described at least two mobile phones one timeslice, each in described at least two mobile phones was all alternately shared in each of each mobile phone and is received or send 32 2 bit A PCM sampling in timeslice.
13. the method for claim 10, wherein:
The TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right; And
The mobile phone of each activation each cycle for each capable centering that transmits and receive data that Activates Phone, only receive data and send data once by data slot.
14. the method for claim 10, wherein the TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right, every row comprises a data field and is divided into the timeslice of specified quantity, and wherein the length in each territory is 2 milliseconds.
15. the method for claim 10, wherein the TDMA scheme is a variable TDMA scheme, and wherein mobile phone quantity is more than the maximum quantity of the link that can set up on the channel.
16. the method for claim 10, wherein the TDMA scheme is a fixedly TDMA scheme, and wherein mobile phone quantity equals the maximum quantity of the link that can set up on the channel.
17. the method for claim 10, wherein:
A plurality of mobile phones comprise 8 mobile phones;
Nearly 4 mobile phones can be activate and need not share timeslice; And
Nearly 8 mobile phones can activate by sharing timeslice.
18. the method for claim 10, wherein:
The TDMA scheme comprises one-period, and this cycle has a plurality of row that transmit and receive data right, and the corresponding such row of each mobile phone is right;
Each mobile phone all is that battery provides energy; And
The mobile phone of each activation only starts shooting in its own timeslice in the cycle and cuts out at other times.
19. a wireless phone that uses with the radio telephone system that an elementary cell and a plurality of wireless phones are arranged comprises this wireless phone in a plurality of wireless phones, wherein elementary cell can be connected to one or more external call line, and this wireless phone comprises:
(a) handset receiver; With
(b) mobile phone transmitter, wherein:
In a plurality of wireless phones each can be activation or unactivated;
Handset receiver and mobile phone transmitter provide a handset transceiver, are used for when this mobile phone activates, and set up a time division multiple access by a basic transceiver and elementary cell for this mobile phone on a shared RF channel and insert (TDMA) link;
Each mobile phone of in a plurality of wireless phones other all comprises a handset transceiver, be used for when said other mobile phone activates, on a shared RF channel, set up a TDMA link by basic transceiver and elementary cell, wherein the mobile phone of each activation is communicated by letter in a special-purpose timeslice timeslice being distributed to the TDMA scheme that Activates Phone, and wherein a plurality of sampling of datas that have a sampling value are sent out in each timeslice; And
To set up a new TDMA link and set up this new TDMA link will be above obtainable channel capacity the time when one at least two mobile phones in a plurality of mobile phones, described at least two mobile phones are alternately shared a timeslice, thereby this realizes sharing by the quantity that reduces this sampling value and be increased in the sampling of data that sends in this shared timeslice.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6934397P | 1997-12-12 | 1997-12-12 | |
| US60/069,343 | 1997-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1286837A CN1286837A (en) | 2001-03-07 |
| CN1121765C true CN1121765C (en) | 2003-09-17 |
Family
ID=22088339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98813602A Expired - Fee Related CN1121765C (en) | 1997-12-12 | 1998-09-01 | Time-division multiple access (TDMA) multi-line wireless telephone system |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100561930B1 (en) |
| CN (1) | CN1121765C (en) |
| AU (1) | AU9041498A (en) |
| WO (1) | WO1999031827A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2984046A1 (en) * | 2007-10-03 | 2013-06-14 | Nexter Systems | METHOD FOR TRANSMITTING PHONY AND DATA BETWEEN SEVERAL USERS |
| FR2922065B1 (en) * | 2007-10-03 | 2009-12-04 | Nexter Systems | METHOD FOR TRANSMITTING PHONY AND DATA BETWEEN USERS OF A RADIO TELECOMMUNICATION NETWORK AND DEVICE IMPLEMENTING SAID METHOD |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5392284A (en) * | 1990-09-20 | 1995-02-21 | Canon Kabushiki Kaisha | Multi-media communication device |
| GB9218864D0 (en) * | 1992-09-05 | 1992-10-21 | Philips Electronics Uk Ltd | A method of,and system for,transmitting data over a communications channel |
-
1998
- 1998-09-01 CN CN98813602A patent/CN1121765C/en not_active Expired - Fee Related
- 1998-09-01 KR KR1020007006335A patent/KR100561930B1/en not_active IP Right Cessation
- 1998-09-01 AU AU90414/98A patent/AU9041498A/en not_active Abandoned
- 1998-09-01 WO PCT/US1998/018090 patent/WO1999031827A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN1286837A (en) | 2001-03-07 |
| KR20010032986A (en) | 2001-04-25 |
| AU9041498A (en) | 1999-07-05 |
| WO1999031827A1 (en) | 1999-06-24 |
| KR100561930B1 (en) | 2006-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5799250A (en) | Interface arrangement for connecting base stations to a private branch exchange | |
| US4949395A (en) | Method and arrangement for dynamically allocating time slots to connections in a digital mobile radio system | |
| US5357513A (en) | Transmission power level adjustment in radio telephony | |
| CN1118981C (en) | CDMA communication system which selectively suppresses data transmissions during establishment of a communication channel | |
| US5299198A (en) | Method and apparatus for exploitation of voice inactivity to increase the capacity of a time division multiple access radio communications system | |
| US5633873A (en) | Combined fixed and mobile radio communication system and method | |
| KR960012090B1 (en) | Radio telephone system using a multisubscriber unit | |
| CA2295438A1 (en) | Dynamic bandwidth allocation to transmit a wireless protocol across a code division multiple access (cdma) radio link | |
| US5703881A (en) | Multi-subscriber unit for radio communication system and method | |
| WO1996000482A2 (en) | Method for allocating radio channels | |
| WO1995019071B1 (en) | Tdma communication system | |
| WO1995019071A1 (en) | Tdma communication system | |
| CN1121765C (en) | Time-division multiple access (TDMA) multi-line wireless telephone system | |
| US6847627B1 (en) | Time-division multiple access (TDMA) multi-line wireless telephone system | |
| CN1108852A (en) | Digital cordless telephone apparatus and a control method thereof | |
| EP0169713A2 (en) | Duplex communications | |
| US6904031B1 (en) | Retrieving stored data from a base unit of a multi-line wireless phone system | |
| JP2899805B2 (en) | Communications system | |
| CN1099790C (en) | Signaling control method for local wireless loop system | |
| KR920001549B1 (en) | Apparatus and method for obtaining frequency agility in digital communication systems | |
| JP4043190B2 (en) | WIRELESS TELEPHONE SYSTEM, COMMUNICATION METHOD IN WIRELESS TELEPHONE SYSTEM, AND BASE UNIT COMMUNICATION WITH WIRELESS TELEPHONE | |
| FI98691C (en) | Apparatus and method for achieving frequency flexibility in digital communication systems | |
| MXPA00005727A (en) | Time-division multiple access (tdma) multi-line wireless telephone system | |
| JPH06164575A (en) | Modification information transmitting system for information channel | |
| CN1012548B (en) | Apparatus and method for obtaining frequency agility in digital communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030917 Termination date: 20160901 |