CN1062105C - A personal communications system with automatic mode selection - Google Patents

Abstract

A personal communications system permits a wireless handset to access either a cellular mobile telephone system (CMTS) or a private wireless telephone system (WTS) which shares the CMTS frequency band by utilizing those CMTS channels which are idle in the area serviced by the WTS. The wireless handset automatically selects between the WTS and CMTS operating modes by maintaining a list of previously accessed WTS control channels and periodically scanning that list for a WTS available at the location of the handset. If a WTS control channel is not found in that list, then the handset periodically scans all possible WTS control channels for the purpose of registering on an available WTS. If no WTS is found, then the handset switches to CMTS mode.

Description

Telephone bandset and control method thereof

The present invention relates to a kind of PCS Personal Communications System (" PCS "), it is increased to (for example small switch (" PBX ") or " centralized small switch " telephone system) in the private telephony system to radio function, and allows wireless pcs handset both to can be used as the PBX extension set also can to make common cellular mobile telephone machine.Suitable manner can manually or automatically be selected by pcs handset, and selection automatically is to monitor what the radio frequency environment of the control signal of the working region that appears at this PCS was realized by pcs handset.

The existing cellular mobile telephone system that in the microgrid pore structure, uses (" CMTS) be not suitable for as the private radio telephone system, because the cellular system of prior art is not limited to insert the authorized user of limited quantity.If there is not this restriction to insert, then the user of CMTS can be operated in this private telephony system.In addition, control of the honeycomb that uses in the cellular system of prior art and switching equipment are applicable to large scale system, thereby, still be all to be inappropriate on the expense from complexity for small-scale PBX or " centralized small switch " application.

Pcs system disclosed herein is to use battery-operated wireless pcs handset to design in the enterprise that its company's facility internal freedom moves for hope allows their employee, described wireless pcs handset can be in the local zone private radio telephone system (" WTS "), for example " PBX " or " centralized small switch " system and outside CMTS go up work.

Particularly, the objective of the invention is to such apparatus and method, promptly by these apparatus and method, above-mentioned pcs handset can be selected between CMTS that can be used by PCS and WTS fast, so that reduce the chance that pcs handset is lost incoming call.The present invention also aims to such apparatus and method, promptly by these apparatus and method, when this is decided to be when selecting automatically between CMTS and WTS mode, this pcs handset is preferably kept and is operated among the available WTS as possible.In addition, when this pcs handset be in the WTS mode and enter one by another WTS cover regional the time, this pcs handset is authorized to and can uses in this zone, said apparatus disclosed herein and method can make pcs handset remain under the control of the WTS that it is just working at present, even it has received the control signal of higher signal strength from the control channel that is used by other WTS.

In the past decade, along with the telephone subscriber is increasing to the capacity requirement of telephone plant, it is practical that various forms of radio telephone systems have become.For example, the wireless home system now can use, and one of them low power base station is directly connected to public switched telephone network (PSTN) (" PSTN "), with telephone set that replaces standard and the wireless capability that finite region is provided at home.In addition, the use of the cellular mobile telephone that extensively adopted before about ten years continues promptly to increase at a lot of metropolitan areas, and 800-900MHz frequency spectrum of distributing to CMTS has become crowded unusually.

The notion of " individual " communication (according to people of this notion can communicate by letter with another person and with his or her location independent) become a general purpose of each telecommunications company, consider this purpose, various multifunction systems have developed.For example, United States Patent (USP) 4,989,230 have described a kind of telephone set, and this telephone set has two transceivers that separate, and their both use the frequency band of the separation that can also can be used by a CMTS by a wireless home telephone system.United States Patent (USP) 4,790,000 have described a kind of private radio systems, by giving the channel of those CMTS of this private radio systems use regularly in advance, the frequency band identical with CMTS shared by this system, and described CMTS will with by this CMTS in the local zone of this dedicated system service not disturb mutually.

Among the PCS that is further described below with at the content quotation disclosed in the relevant patent application here in the lump as a reference, this PCS constantly scans all CMTS voice channels and dynamically selects and keep one is the channel group of idle those CMTS voice channels in the local zone by this PCS service.These idle channels can be used by WTS, as control or the voice channel of this WTS.

When pcs handset is mobile in the WTS, because its shares the same frequency spectrum that is used by the CMTS that may just work and other WTS systems in same local zone, in the process that realizes this pcs handset required function many abnormal problems have appearred.

For example, as the result of dynamic scan and channel allocation, this WTS control channel can be any channel (perhaps in the A of cellular frequency spectrum side or B side) that can be used as the CMTS voice channel 400 in principle.When pcs handset attempted to enter the WTS mode of operation, it must carry out a scan channel to find out the suitable control channel of its WTS that may register.Yet, it is unfavorable always scanning all potential WTS control channels, because sweep time will uncommon length, and the paging signal to the incoming call of expression of pcs handset that produces in this scanning process will be lost by this mobile phone, thereby has caused unacceptable degree of the incoming call of losing.

Therefore, being implemented in the scanning process of seeking the WTS control channel that can insert in time of enough weak points effectively is necessary so that do not lose the calling paging signal for pcs handset.

In addition, owing to may have other WTS system corresponding overlapping microgrid hole many and that may just work in the same place, therefore, in case pcs handset has been determined the control channel of the WTS that it is allowed to access, wish that this pcs handset keeps being tuned at this WTS system, even an adjacent WTS control channel than large-signal intensity that starts from a different WTS system is received by this pcs handset.Here among the present invention of Pi Luing, the scanning process of being finished by pcs handset provides various abilities.

An object of the present invention is to provide a kind of pcs handset, it can automatically select a kind of CMTS or WTS working method, and inserts an available WTS system rapidly, so that do not lose the calling paging signal to this mobile phone.

Another object of the present invention provides a kind of pcs handset, and it can be worked in CMTS or WTS, and when this mobile phone had been determined the WTS system that can insert, it preferably automatically entered the WTS mode.

Another purpose of the present invention provides a kind of pcs handset, and its maintenance work and need not in the WTS of current access system is transformed into the WTS system that another has strong signal.

A further object of the present invention provides a kind of method that realizes above-mentioned each function in pcs handset.

For achieving the above object, the telephone bandset that the invention provides a kind of both sides' of being used for formula is selected a kind of method of working method automatically, this telephone bandset is adapted to operate in cellular mobile telephone system (CMTS) and at least one radio telephone system (WTS), by using in the zone by described WTS service is those idle CMTS channels, this radio telephone system is shared the CMTS frequency band, it is characterized in that may further comprise the steps: the previous WTS control channel that uses of storage in the table in the memory of described telephone bandset; In described mobile phone, on the described channel of described table, carry out first scanning, to determine existing of one or several WTS control channel; Registering request owing to send one from described mobile phone on one or several described WTS control channel that described first scanning is found; Changing described mobile phone is operated in its control channel in described WTS mode and has accepted on the WTS of described registration request.If described registration request all is rejected, utilize described telephone bandset to carry out second scanning of all CMTS channels, these CMTS channels may be as the WTS control channel to determine existing of a WTS control channel; Because described second scanning is found on the described WTS control channel, send a registration request from described mobile phone; Changing described mobile phone is operated on the WTS that its control channel has been received in registration request in described WTS mode; The registration request all is rejected as described, then changes described operating handset in described CMTS mode.

The present invention also provides a kind of method that both sides' formula telephone bandset automatically is converted to radio telephone system (WTS) working method from cellular mobile telephone system (CMTS) working method, by using in the zone of described WTS service is those idle CMTS channels, described WTS shares the CMTS frequency band, and described method is characterized in that may further comprise the steps: (a) the previous WTS control channel that uses of storage in the table in the memory of described telephone bandset; (b) in above-mentioned mobile phone, carry out first of described channel periodically and scan, so that determine the existence of a WTS control channel; (c) registering request owing to send one from described mobile phone on the WTS control channel that described first scanning is found; (d) the described mobile phone of conversion is operated in its control channel in described WTS mode and has accepted on the WTS of described registration request; (e) if the registration request of step (c) all is rejected, carrying out periodically may be as second scanning of all CMTS channels of WTS control channel, to determine existing of a WTS control channel; (f) registering request owing to send one from described mobile phone on the described WTS control channel that second scanning is found; (g) the described mobile phone of conversion is operated on the WTS that its control channel has been received in one of step (f) registration request in described WTS mode.

In addition, the invention provides a kind of method that both sides' formula telephone bandset automatically is converted to cellular mobile telephone system (CMTS) working method from radio telephone system (WTS) working method, by making in the zone of described WTS service is those idle CMTS channels, described WTS shares the CMTS frequency band, and described method is characterized in that may further comprise the steps: (a) the previous WTS control channel that uses of storage in the table in the memory of described telephone bandset; (b) in described mobile phone, carry out first scanning periodically at the described channel of described table, with the existence of (SID) the WTS control channel that conforms to the SID of that WTS of described mobile phone registration of determining to have system banner, described mobile phone remains on the strongest described WTS control channel that described first scanning is found in the WTS mode; (c) carrying out periodically may be as second scanning of all CMTS channels of WTS control channel, to determine existing of a WTS control channel, described mobile phone remains in the WTS mode has the strongest described WTS control channel that a SID conforms to the SID of that WTS of described mobile phone registration; (d) do not have the WTS control channel that a SID conforms to the SID of the WTS of described mobile phone registration if find in described second scan period, then registering request owing to send one from described mobile phone on one or several described WTS control channel that described second scanning is found, described mobile phone remains on the strongest WTS control channel of accepting described registration request in the WTS mode; If (e) all described registration requests are rejected, change described operating handset in described CMTS mode.

In addition, a kind of both sides' telephone bandset that is adapted to operate in a cellular mobile telephone system (CTMS) and at least one radio telephone system (WTS) of the present invention, by using in the zone of described WTS service is idle CMTS channel, WTS shares the CMTS frequency band, and described telephone bandset is characterized in that comprising: the memory that is used to store the WTS control channel table of previous use; The device that is used to scan the table of storage and determines the existence of one or several WTS control channel thus; On described control channel, send the device of a registration request; Be used to receive a device that registration is accepted or refused that comes from described WTS control channel; Control device is used for operating the described mobile phone that its control channel has been accepted a WTS of described registration request, if all described registration requests all are rejected, then described control device operates in the described mobile phone among the described CMTS.

In order to understand character of the present invention more fully, feature and advantage please refer to following accompanying drawing and the detailed description of the present invention preferred, that illustrative embodiment did shown in the figure be will be seen that.

Fig. 1 shows the basic structural unit and the typical structure of a pcs system.

Fig. 2 illustrates the block diagram of main circuit parts of the control unit of pcs system.

Fig. 3 is illustrated in the block diagram of the main circuit parts of a base station of using in this pcs system.

Fig. 4 illustrates the block diagram of the main circuit parts of a scanning movement that uses in this pcs system.

Fig. 5 illustrates the block diagram of the main circuit parts of the pcs handset that uses in this pcs system.

Fig. 6 illustrates a kind of state diagram of pcs handset, and this illustrates the automated manner selection course is how to be realized by this pcs handset.

Fig. 7 illustrates a kind of state diagram of this pcs handset, and this scanning that illustrates the control channel of prior access is how to be used as the part of this automated manner selection course to be realized by this pcs handset.

Fig. 8 illustrates a kind of state diagram of this pcs handset, and the part how this scanning fully that illustrates control channel is used as this automated manner selection course is realized by this pcs handset.

Fig. 9 illustrates a kind of state diagram of this pcs handset, and this illustrates how this WTS mode is performed during the automated manner selection course that is realized by this pcs handset.

Figure 10 illustrates a kind of state diagram of this pcs handset, and when this illustrated in this pcs handset is in as the WTS mode of a part of being selected by the automated manner of this pcs handset realization, how the scanning of the control channel that inserts was in advance carried out.

Figure 11 illustrates a kind of state diagram of this pcs handset, and when this illustrated in this pcs handset is in as the WTS pattern of a part of being selected by the automated manner of this pcs handset realization, how the scanning fully of control channel was carried out.

The purpose of PCS Personal Communications System described herein will expand to present use to radiotelephone service, for instance, and in the office or building of traditional PBX or " centralized small switch " telephone system.Realize that the required additional firmware of this PCS can easily be added in the above-mentioned existing private telephony system, and work with lightweight portable difunctional pcs telephone mobile phone, when the user was busy with their business activity, this telephone bandset can carry easily.Each pcs handset comprises the standard feature that all present cell phones can be used, in addition can as radio extension in the less local working region of WTS with low-power operation.In an additional embodiments, this pcs handset can be an only device of the single mode of the low merit operation in this WTS.

For the existing frequency spectrum of more efficient use, this WTS is made of a plurality of microgrids hole, these microgrid holes are operated in the identical frequency band of being used by the CMTS that coexists in the corresponding to mode that requires with Federal Communications Committee (" FCC "), so that share 800-900MHz frequency spectrum of distributing to this CMTS.In order to do like this, this PCS has used standard cellular frequencies (perhaps A or B side), and does not disturb or influence on the contrary mutually the work of this coexistence CMTS.

The realization of above-mentioned situation is to finish by such device in PCS, and this device dynamically is chosen in the cellular voice channel that is not used in the local zone that is covered by this WTS, and make WTS can with these channels both can be used as control and also can be used as voice channel.By this way, available WTS channel is dynamically revised to adapt to the variation of this CMTS environment, for example increase of the increase of mesh or decomposition, utilization rate or minimizing or the like.

As technical background, the cellular mobile telephone system of the U.S. is to move under Advanced Mobile Phone Service (" the AMPS ") rules by the FCC approval at present.Under these AMPS rules, available 800-900MHz CMTS frequency spectrum comprises 1023 honeycomb channels, is divided into the two halves (A side and B side) of symmetry in each geographic area.B side frequency spectrum is under the radio telephone carrier control that works in this geographic area, and A side frequency spectrum is at one independently under competitor's the control.

Its system identification number (" SID ") of each CMTS broadcasting, and it has been distributed to and be exclusively used in 21 channels that transmit control signal, and other 11 channels are used for the paging purpose, remaining channel is used for the speech transmission by CMTS.

For instance, B side honeycomb channel comprises 334-354,11 special-purpose paging channel (" P-Ch ") 355-365 of 21 Dedicated Control Channel (" C-Ch ") and voice channel 366-666 and 717-799.For full-duplex operation is provided, each channel comprises two transmission frequency that are denoted as forward direction and backward channel, forward channel sends to the cellular mobile telephone machine to information from a mesh station, and opposite backward channel ground information sends to this mesh station from this cellular mobile telephone machine.

In a preferred embodiment of the invention, this PCS control channel with in 32 special-purpose CMTS controls and the paging channel separately, but shared CMTS voice channel.Like this, with reference to a B side CMTS, being selected at the possible C-Ch that uses among the WTS begins at channel 366, and by the upwards expansion of the channel number of block size able to programme, but described journey block size by the CMTS activity in the local zone that covers by this WTS grade (level) and to form the size and the numbering in microgrid hole of WTS next definite.For example, the channel code group length of distributing to the WTS control channel can be set to 42 channels.Yet for being based upon the WTS that metropolitan center has heavy CMTS business, this block size can be adjusted upward, to guarantee having sufficient control channel to use for this WTS.These channel code group length data send on this WTS control channel and are stored in the pcs handset.When a pcs handset entered another WTS regional, its obtained the new channel code group length that also storage is sent by described WTS, and can adjust its scanning process thus.

In the preferred embodiment of this PCS, according to field experiment, it is desirable that the in fact enough all WTS of the maximum channel block size of 127 channels use.Under this maximum channel code character situation, this PCS will choose (for the situation of B side CMTS frequency spectrum) for the channel that this WTS selects from the channel 366-492 CMTS voice channel frequency band.This WTS voice channel can be chosen from idle CMTS voice channel (for example 493-666 and 717-799) subsequently.Except as the control channel, this WTS control channel also plays a part paging and the access channel of WTS.Each WTS distributes a system identification number (" SID ") by CMTS operator, and it is different from CMTS SID, and it is broadcasted on the WTS control channel.

In a preferred embodiment, PCS generally comprises each parts shown in Fig. 1, and each parts will detailed below description.

Control unit:

The control unit of this PCS (" CU ") 2 is carried out all controlled function such as information, call treatment, checking and the base stations control kept about the ad hoc structure of this PCS.In this preferred embodiment, this CU2 uses 2500 extension leads of standard to be connected to PBX4, and makes this PBX extension wireless.The block diagram of each parts that CU2 includes is shown in Figure 2.With reference to this figure, analog telephone trunk line 6 is connected to one or more loop trunks cards 8 (" LTRK "), and this loop trunks card 8 is used to monitor ringing wire, and sends ring and on-hook message to central transaction card 10 (" CPC ").

CPC10 plays a part a communication controler, and it comprises the microprocessor that the software instruction that provides in programmable read only memory (" PROMS ") can be provided.This CPC10 is connected to the PCS database, and in this preferred embodiment, this database storage is in can being stored the dimension volatile random access memory (" NV-RAM ") of addressing by CPC10.

As shown in Figure 2, this CPC10 is connected to a service circuit card (" SCC ") 12, and it provides signalling tone and handles the information that receives from ancillary equipment.This SCC12 also comprises a plurality of serial ports and the one (modulator-demodulator 14 of on-port) on port.This CPC10 is also connected to one or more digital extended cards (" DEC ") 16, and it provides suitable interface and be connected with scanning movement to each base station of PCS.As shown in Figure 2, also comprise a multifrequency receiver (" MFR ") 18 among the CU2, it is translated dual-tone multifrequency (" the DTMF ") signal that offers modulator-demodulator and local connectivity port along telephone wire.

This PCS software and system database can be used by the communication controler among the CPC10.This PCS database can also can enter CU2 through modulator-demodulator by the far-end dialing and insert further by being connected to serial or the numeral mouthful access that CU2 can use.

The base station:

Each base station (" BS ") 20 all comprises the low-power wireless transceiver, and they provide the Radio Link that arrives pcs handset.CU2 is received in each base station, and these base stations provide power and signal between this CU2.Base station group (" BSG ") 22 constructed by CU2, and is made up of one or more independent base stations.Each BSG22 has a base station 20, this base station 20 as a job so that the control base station of Combination Control/paging channel to be provided.In this preferred embodiment, circulate in all base stations of BSG22 in this control base station.So just reduced the influence of hardware fault on effective control channel.

Fig. 3 illustrates the block diagram of a base station 20.In a preferred embodiment, there is the receiver 24,26 of dress in two each base station 20.When the free time, a receiver is carried out the search of idle WTS V-chs, and another handles calling C-Ch information.When base station 20 provided a voice channel, any receiver in the receiver 24,26 can be used in this base station 20, and can change between two receivers.

Except this two receiver 24,26, base station 20 comprises 28, one duplexers 30 of a transmitter and the frequency synthesizer 32 as its radio frequency unit part.Each base station 20 also has a controller 34, and its is converted into suitable required analog signal to the digital signal that receives from this control unit 2, meets sb. at the airport 24,26 and transmitter 28 to operate this.In addition, an internal electric source 36 receives an outside direct voltage that is provided from this CU2, and regulates the voltage of exporting to various radio-frequency units.

Scanning movement:

This scanning movement (" SS ") 40 constantly monitors the business on honeycomb frequency, can distribute to WTS by this PCS and use to determine which CMTS voice channel.This scanning movement 40 directly is wired to CU2 and by its power supply.Idle and the busy CMTS channel of these scanning movement 40 identifications, and they report CU2.In big overlay area, this PCS can comprise several scanning movements, because available channel can be from a sub-district to another cell change.

In this preferred embodiment, each SS40 and one or more BSG22 are combined, constitute a scanning movement group (" SSG ") 42 together.The use of a plurality of SSG allow this PCS by utilizing each base station 20 separation and obtain higher spectrum efficiency by the variation of transmission/reception in the whole zone of this WTS service.For example, may have than near the bigger noiseless CMTS channel group in those base stations 20 of this skin near the base station 20 at a building center.

Fig. 4 illustrates the block diagram of this scanning movement 40.With reference to this figure, each scanning movement 40 comprises a controller 42, and digital signal that is provided by CU2 and the signal of being exported by the receiver in this scanning movement 40 44,46 are provided for it.A backward channel receiver 44 (it listens to pcs handset 50) and a forward channel receiver 46 (its listens for base stations 20) all are included among this SS40.The calling signal is suitably sent to forward direction and reverse receiver 44,46 by a radio-frequency (RF) switch 48.

In addition, the transmission of correct WTS system identifier (" SID ") is discerned and verified to this scanning movement 40, and can carry out the measurement of the signal strength signal intensity indication (" RSSI ") that receives on this backward channel.

Pcs handset:

In this preferred embodiment, each pcs handset (WS) 50 is dual mode portable units, and it both can be used as the work of a total power portable cellular phone machine, also can be used as the work of a low-power WTS extension set.CMTS or " outside " mode and WTS or " inside " but mode between the mode both selects the artificially also can automatically carry out.Select when being automatic when mode, any CMTS or the WTS in its scope will be determined and be locked in to this pcs handset 50.In an alternative embodiment, this pcs handset can be folk prescription formula unit, and it is only as a WTS extension set job.

In this preferred embodiment, as will further describing below, this pcs handset 50 attempts using an available WTS when possibility, and when not having detectable WTS signal, maybe when service request was refused by all WTS systems that can insert, this pcs handset only was transformed into the CMTS mode.When in the CMTS mode, this pcs handset 50 is searched for the WTS system that provides professional periodically.This system one is found, and this pcs handset 50 just is transformed into the WTS mode.Yet this mode is only changed and is just taken place when this pcs handset 50 is not engaged in when calling out.

Fig. 5 illustrates the block diagram of battery-operated pcs handset 50.With reference to this figure, an antenna 60 is connected to an antenna assignment device 62, the transmission signal from a transmitting set part 66 is sent to antenna 60 and the signal that is received by antenna 60 is sent to wireless receiver part 64.Local-oscillator circuit 68 provides wireless receiver part 64 and transmitting set part 66 the required frequency that is necessary, be tuned on any CMTS channel.

This pcs handset 50 also comprises a master controller 70, and it provides control signal to wireless receiver part 64, transmitting set part 66 and local-oscillator circuit 68, and from these parts received signals.The also connected CPU 72 of this master controller 70 (" CPU ") communication.In addition, the intensity that signal quality analyzer 74 is connected to this wireless receiver part 64 and responds received signal provides RSSI information to CPU72, in order to analyze.As further expression of Fig. 5, this pcs handset 50 comprises an earphone 76, microphone 78, appropriate display unit 80, buzzer 82 and a keyboard 84.

Except these pcs system parts, the preferred embodiment of this PCS comprises 5 and supervisor consoles of (as shown in Figure 1) digital desk telephone (" DS ") (" AC ") 7, and they are used to structure and safeguard this PCS.Supervisor console 7 can also be used for checking diagnosis/performance statistics and standby or recover this PCS database.PCS also comprises a cellular operator maintenance console (" MC ") 9, and it allows this cellular operator to monitor this PCS, and executive system remote control and maintenance and retrieval have the information of gateway to charge.

The work of PCS:

For honeycomb frequency of reusing this CMTS effectively and the variation that can promptly adapt to the local cellular environment, this PCS has adopted prevention and effective measures to guarantee in effectively not interference of WTS and CMTS interchannel.

Each precautionary measures is implemented by this scanning movement 40, and this scanning movement 40 detects the use of CMTS channel and delete each channel from idle cellular voice channel group, and described idle cellular voice channel can be used to PCS and distribute to this WTS.Yet each channel is not added in the idle channel group, up to their idle sufficiently long time, to prevent various error situations.

For such work, this scanning movement 40 utilizes the technology of analyzing the active level of each channel in two time windows according to two channel activity threshold values, carrying out a kind of moving average type analysis, it is determined that a channel is whether deleted and still is added in this idle channel group.Particularly, this scanning technique has been used one " additional active threshold value ", and is that it defines that a channel may have and still be added to maximum activity amount in this idle channel group; And one " deletion activity threshold ", it defines above this threshold value one channel deleted maximum traverse degree.In addition, this scanning technique has been used " the deletion window " and " additional window " than the long duration of short duration relatively.Like this, if the active level of a particular channel has surpassed this deletion activity threshold in the time interval that is limited by the deletion window, then this channel will be considered to unusual, and remove from this idle channel group rapidly.Yet if in the moment after a while, the whole show of this channel is less than the additional active threshold value in the additional window of relative long duration, and this channel can reuse subsequently and therefore be re-inserted in this idle channel group.For instance, this adds and deletes activity threshold and can be set at 5% and 3% respectively; And deletion window and additional window can be set at 1 hour respectively and 4 hours.

Additional when carrying out channel interpolation or deletion by SS40/deletion message just is sent to CU2.This makes this CU2 can construct and keep a CMTS channel group, and this CMTS channel group can be used by the base station among this SSG42 20.This control unit 2 is kept the idle channel group for each SSG42 when energized.These idle channel groups are installed among each scanning movement SS40 and base station BS 20 of scanning movement group 42 down.

The information that the idle channel group is provided by scanning movement 40 and base station 20 by use by this control unit is dynamically kept and is upgraded.For example when a voice channel is started by a base station 20 or discharges, the message of " channel is using " of the notified and word of this control unit 2 is sent to the scanning movement 40 that belongs to base station group 22.In addition, whenever a scanning movement 40 has been determined a channel and must be added in the available idle channel group or when deleting in this group, its upgrades its this locality group, and send one additional/deletion message is to control unit 2, it gives all base stations 20 among the scanning movement group 22.

Effectively the Interference Detection measure is implemented by base station 20.If the monitor audio single-tone (" SAT ") that sends on voice channel is incorrect during this conversation, then this conversation or be switched on the voice channel of a free time is not if perhaps there is channel to use then termination of a call.In addition, any illegal access attempts on the WTS control channel all is considered to the CMTS voice channel to be disturbed, and this channel is cancelled by base station 20 immediately.This disturbed condition is reported to CU2, and it deletes this WTS control channel from the idle channel group, and is new idle control channel of BSG22 selection.

In a word, by implementing said method to avoid the interference of the current CMTS channel that in local zone, uses by this PCS service, each PCS can keep a reusable honeycomb channel table, i.e. this idle channel group, this channel table is upgraded continuously and dynamically and is changed, in response to the cellular services that is monitored on this CMTS.When distributing speech or control channel to give this WTS, described idle channel group is used by this PCS.When energising, from this idle channel group, automatically distribute control channel to give base station group 22, and base station group 22 use this idle channel group dynamically to select idle voice channel.

In the most preferred embodiment of this PCS, be that each base station group 22 selects a control channel, and this control channel constantly sends this pcs handset 50 required Overhead Message, paging and out of Memory.In each base station group 22, the base station 20 that is sending on this control channel is used to all callings of starting.When WTS voice channel of needs, this base station 20 to this new voice channel, and is not re-used as a control channel job from the control channel frequency inverted.Then, this CU2 selects an idle base station 20 as the control channel transmitter from base station group n.

The processing that arrives the immigration calling of this WTS is carried out by control unit 2, and these control unit 2 each BSG22 pagings of indication pcs handset 50 relevant with called PBX circuit also waited for a response.If these pcs handset 50 these pagings of response, then this control unit 2 will suitably distribute a voice channel between base station 20 and this PBX circuit.

When each bar voice channel was activated, the control base station 20 of BSG22 notified described voice channel of this CU2 and SAT to be used.All its existing effects that this CU2 contrasts in this WTS system are subsequently transmitted this channel of check/SAT combination.During if selected channel/SAT is combined in effectively and uses, then this CU2 attempts seeking one and can't help the SAT that this channel using.If do not find, then order this BS20 to select a new channel and SAT.In case effective voice channel and SAT approved by CU2, then this base station 20 sends these channel informations to pcs handset 50 and be transformed into talking mode.In an alternative embodiment, this CU2 can specify an available voice channel and SAT.In this case, base station 20 will confirm that above-mentioned voice channel is an idle condition before being transformed into talking mode.

In case a calling is underway, this CU2 management of base station is crossed the district and is switched.Cross the district switch by conversation base station initiated, but this CU2 implements the best base station group 22 that all BSG22 cross district's handover measurement, selected the district to switch, and has assigned this and crosses and distinguish switching by adjusting new voice channel.

Send to old base station 20 by the channel information confirming to receive with this information and pcs handset 50 is adjusted according to the distribution of the new voice channel of above-mentioned process from this new base station 20.When a pcs handset 50 is transformed into this new voice channel, send audio frequency from this old base station to new base station.During a conversation, if dropping to district's switching, opened below the beginning threshold value backward channel RSSI, base station 20 will ask the district to be switched.

During a base station 20 was in conversation, it utilized this sat signal to detect and disturbs (honeycomb and PCS).If the sat signal that transmits is lost or incorrect and this backward channel RSSI has surpassed the Interference Detection threshold value, then this base station 20 determines that interference signals are being received and are attempting switching this pcs handset 50 on an idle voice channel of same base station.If on new voice channel, detect correct SAT, then be somebody's turn to do district's switching and finished also normal running recovery.Yet,, be somebody's turn to do district's switching failure, and this base station 20 will discharge this voice channel and turn back to stand-by state if in a time interval of selecting, do not detect correct SAT.

If control base station detects SAT on reverse control channel or honeycomb inserts message, and this backward channel RSSI surpassed during preset time of Interference Detection threshold value, and then this signal is considered to honeycomb and disturbs.SAT represents that this Cellular Networks may use this channel as a voice channel, and the honeycomb access attempts means that this channel connects as a CMTS and puts channel and using.When any was detected in two kinds of interference modes, this base station 20 stopped on the above-mentioned control channel and sends, and reported the disturbed CU2 of giving, and turned back to standby mode.Subsequently, this CU2 specifies another control channel of selecting again from the idle channel group.

As the measure of another kind of interference eliminated, if this base station 20 is determined to drop to below the threshold value of " scope is outer " from the signal of an ongoing calling, then this PCS will finish this calling, not disturb the CMTS conversation of carrying out to guarantee it.

For the use that guarantees WTS is only limited to the user of mandate, requires pcs handset 50 in a single day to enter the WTS system in a preferred embodiment and just register with this WTS system automatically.All undelegated pcs handsets 50 and all common cellular handsets still can insert CMTS and not disturb when in the WTS footprint.

Pcs handset 50 can be between WTS and CMTS working method be automatically selected, but its present WTS system of registering is preferably selected in design.Mobile phone is by moving identifier (" MIN ") and authorize at the PCS of WTS electric series number (" ESN ") and the CMTS by memory mobile phone in the PCS database.When a pcs handset 50 was attempted into the WTS system, it started one and registers request.If find the registration data of this mobile phone in the PCS of that WTS database, then this registration request is accepted.But if the mobile phone registration data does not find, then this registration request is rejected, and according to following public formula, this pcs handset 50 is not attempted registering at that WTS again, is recycled power supply (till during power-cycled) up to this pcs handset 50.

Automated manner is selected:

As mentioned above, the present invention allows pcs handset 50 automatically to determine and is locked in any CMTS or WTS system in its scope.In a preferred embodiment, pcs handset 50 is supported three kinds of working methods: only WTS, only CMTS and automated manner selection.When being set in automated manner when selecting, when may the time pcs handset 50 attempt using the WTS systems and when not having detectable WTS signal, only be transformed into CMTS mode, perhaps all inserted WTS system refusal of registration requests.

The roaming of PCS is to realize with a kind of method that is different from roaming cellular in some respects.Pcs handset 50 search WTS control signals.If found, this pcs handset is locked in that WTS control signal and attempts that WTS system is registered.If registration is rejected, then pcs handset 50 is at first attempted determining any other available WTS system, and then this pcs handset 50 is transformed into the CMTS mode.According to the present invention, this pcs handset will not attempted registering a undelegated WTS system again, up to next time by the power supply cycle power time till.This has stoped excessive registration refusal and has loaded this PCS.

When the WTS dropout, pcs handset 50 is at first attempted determining a control channel in the WTS system of its last registration.If failed, its attempts finding out a new WTS system, if it is inconsistent with the last WTS SID that inserts to be included in the WTS SID that the system parameters of a WTS channel unblanks in the message, then pcs handset 50 will be attempted registering at this new WTS.The registration refusal will cause pcs handset 50 to be transformed into the CMTS mode.

In case be in the CMTS mode, pcs handset 50 is carried out the background scans of this WTS control channel periodically.If find WTS signal (and not sending the SID that causes registering refusal), then pcs handset 50 attempts being transformed into the WTS mode.

From top pcs system, apparent in the narration of operating characteristic that its is wished and predetermined environment, the problem of many uniquenesses has appearred in realizing not relating to the pcs system of CMTS.For example, CMTS is operated in the control channel of 21 special uses, and in order to obtain and be locked in a CMTS control channel, cellular handset can successfully scan these Dedicated Control Channel fast, and this CMTS control channel can provide the CMTS business.But, be suitable complexity with respect to the comparable situation of PCS.

In fact, depend on the quantity of the business in the CTMS of coexistence, the CMTS voice channel that can be used for the WTS in the idle channel group by PCS can be dispersed in widely 100 or more CMTS voice channel on.

Therefore, before the control channel that finds the WTS that accepts its registration request, this pcs handset 50 may the CMTS voice channel of scanning more than 100.In addition, scanning special-purpose CMTS control channel with cell phone by routine compares, the sweep time of every CMTS voice channel is quite long, because whether must determine that channel as the WTS control channel for every channel in this scanning, perhaps whether it is the work voice channel of WTS or CMTS.For instance, every channel of this definite possibility of channel status will be with about 300 milliseconds.Therefore, in this example, if this pcs handset 50 needs 100 channels of scanning before finding a suitable WTS control channel, then this scanning is used about 30 seconds possibly.Be unacceptable to a specific pcs system Chang sweep time like this.This is that they are to be separated by approximately to send in 5 seconds because the paging signal of indication calling generally comprises the data pulse string of two weak points.Therefore, the probability that paging signal may be lost during channel scan procedure increases with the rising of channel sweep time.

Second the relevant problem that occurs in the PCS environment is: this environment may comprise the WTS system of many not negative laps, and each system is distinguished by its signature SID.This may be typical situation in a big office building, and the company of the different piece of different layers or each floor utilizes PCS to set up the WTS system separately in the building.In the environment of this WTS a plurality of, high superposed system, wish that more mobile phone 50 remains operating in the WTS of its registration at present as far as possible longways, and do not attempt another WTS registration in overlapping same services zone.This requirement with the CMTS mobile phone is very different, and the CMTS mobile phone generally is designed to be locked on the strongest control channel of CMTS control channel of 21 special uses.

In addition, in the PCS environment, be disabled if utilize the service of WTS system, wish that then mobile phone 50 continues available WTS system that business will be provided of scanning.Otherwise, if the signal of the strongest control channel signals to be pcs handset uncommitted WTS system, then this pcs handset 50 users do not know to be locked in this undelegated WTS system and can not receive paging from its WTS system, in the position of this pcs handset 50, the control channel signals of its WTS system this locality a little less than.

Provide desirable function for fear of these problems with to pcs handset 50, the automated manner of pcs handset 50 selects to realize following public scanning technique.

At first, referring to the block diagram of pcs handset shown in Figure 5 50, pcs handset 50 has a memory 90, and it keeps storage to insert a cache table 92 of WTS control channel recently.Cache table 92 comprises the channel number and the SID of every channel of these control channels.New control channel can be added to the top of cache table 92, and owing to added new channel, each channel is removed from the bottom of this table.In a preferred embodiment, cache table 92 can be stored nearly 7 SID that channel number is relevant with them.But according to the needs of PCS, the capacity of cache table 92 can increase or reduce.

Referring to Fig. 5, pcs handset 50 also keeps a channel table 94 in memory 90.This channel table 94 is made into the more scanning of the cache of complete description and the part of scanning process fully below.The remain valid inventory of the channel that the PCS Overhead Message received of channel table 94 shows that this channel is a WTS control channel.Channel table 94 comprises channel number, the SID relevant with this channel number and the RSSI measured to this channel.In addition, as shown in Figure 5, the memory 90 of pcs handset 50 keeps a bad SID table 96, and it is corresponding to the SID of the WTS system of the registration request of refusing to be sent by this pcs handset 50.

When placing automated manner to select, wish that pcs handset 50 automatically selects also to be locked in rightly the system of a mandate, a WTS or a CMTS system in its scope.In addition, when in the WTS mode, no matter both sides' formula mobile phone or only be operated in the mobile phone of WTS mode is attempted to remain in the WTS of its work at present always wish this pcs handset.For reaching this purpose, pcs handset 50 is carried out scannings more described in detail below.

Initial cache scanning and scanning fully:

In the preferred embodiment of the present invention, in case power up or in CMTS or WTS mode and when not carrying out session, pcs handset 50 scans the CMTS channel of WTS signal periodically.

Fig. 6-Figure 11 is the state diagram that is identified in each state that automated manner selection course period P CS mobile phone 50 passes through.The path that connects each state is with the condition identification that must satisfy each path movement, and wherein "/" represents logical "or" and "+" represents the logical condition.

Referring to Fig. 6, powering up of pcs handset 50 at every turn, remove bad SID inventory 96, and pcs handset 50 is carried out " initial cache scanning " (state 110) narrated below and more completely represent in Fig. 7 at state 100.If find the WTS control channel in initial cache scan period, then pcs handset 50 enters WTS mode (state 120).If the initial cache scan period after powering up is not found the WTS channel, then pcs handset 50 enters " initially scanning fully " (state 130).If find a WTS control channel in initial scan period fully, then pcs handset 50 enters WTS mode (state 120).But, if showing, initial scanning fully is not operated in this regional WTS control channel, then pcs handset 50 automatically is transformed into CMTS mode (state 140).

Represent that as Fig. 6 when in the CMTS mode, during perhaps at certain predetermined time interval or at the CMTS dropout, pcs handset 50 scans the CMTS frequency spectrum for available WTS control channel periodically.

In the preferred embodiment, cache scanning timer can be set in the quite short time interval (for example 60 seconds), and one scan timer fully and can be set in the long time interval (for example 5 minutes).When in the CMTS mode, no matter when cache scanning timer expired (for example every 60 seconds) or CMTS dropout, pcs handset 50 will be carried out initial cache and scan.If do not find the WTS channel in initial cache scan period, then pcs handset 50 rests on the CMTS mode.Sweeping fully when looking for timer expired (for example 5 minutes interval), the pcs handset 50 that is in the CMTS mode will be carried out and initially scan the control channel with search WTS fully, and if do not find available WTS control channel, will remain on the CMTS mode.If WTS control is determined, then pcs handset 50 will attempt inserting the WTS that is just sending that control channel.

Therefore, in the preferred embodiment, carry out initial cache scanning (for example with 60 seconds interval) and the initially existence of scanning (for example 5 minutes interval) searching WTS (control channel) fully periodically at the pcs handset 50 of CMTS mode.If find any WTS channel, then pcs handset 50 is transformed into the WTS mode from the CMTS mode.Like this, the initial cache of carrying out when the cycle scans or initial scanning fully shows that pcs handset 50 preferably is transformed into the WTS mode when having available WTS control channel, and the registration of mobile phone subsequently request is accepted.

Fig. 7 illustrates the state diagram of initial cache scanning.Referring to this figure, in the beginning of initial cache scanning, local-oscillator circuit 68 with the wireless receiver part 64 of pcs handset 50 be tuned to be stored on every channel in the ultrahigh speed buffer table 92 (state 200).If receive to show this channel just as the suitable digital signal pattern of WTS control channel work, then this channel number, the corresponding WTSSID that sends on control channel and its RSSI (being measured by signal quality analyzer 74) are stored in the channel table 94.All channels have been scanned and after this channel table 94 makes in cache table 92, pcs handset 50 is selected the not the strongest channel (state 210) in bad SID inventory 96 (being that channel has maximum RSSI) of its SID, and attempts registration (state 220) on that channel.If register successfully, then the cache table is updated (state 230) and pcs handset enters the WTS mode, uses that control channel (state 240).If registration is unsuccessful, the next one the strongest channel of pcs handset 50 scannings in channel table 94 then is empty or till registering successfully up to channel table 94 by that analogy.In initial ultrahigh speed scanning process, the SID (so-called bad SID) that produces those channels of a bad SID inventory 96 (state 250) and refusal of registration request is left out from cache table 92 (state 260) and channel table 94 (state 270).Therefore, registration is subsequently attempted no longer attempting on these control channels.

If effective WTS control channel (state 280) is not found in initial cache scanning, then initially scanning fully of pcs handset 50 beginnings, its details is shown in Fig. 8.Referring to this figure, initially scanning is similar to initial cache scanning fully, but is not limited to only scanning those channels in cache table 92.On the contrary, the gamut (state 300) of the WTS control channel that the initial scanning of scanning fully is possible, it can be by the programmable value identification that is stored in the pcs handset 50.As like that in initial cache scanning, at first check the SID (state 310) of the strongest channel that finds in scan period, if it is not included in during bad SID shows, then on that channel, register trial (state 320).If find a WTS control channel that allows pcs handset 50 registrations, it is added to cache table 92 (if not what existed) at state 330, and pcs handset 50 enters " WTS finds " state (state 340), and it is placed WTS mode (see figure 6).If the registration of attempting is rejected, then that channel is added to bad SID inventory (state 350) and leaves out (state 360) from channel table.This circulation is repeated until till registration trial and success or the channel table sky.If an available WTS control channel is not found in initial scanning fully in this process, then pcs handset 50 enters " WTS does not find " (state 370) and enters the CMTS mode again, as shown in Figure 6.

When in the WTS mode, carry out " scanning of WTS cache " (state 400) and " WTS scans fully " (state 410) that is shown in Fig. 9 periodically according to the state diagram pcs handset 50 that is shown in Figure 10 and 11 respectively.Referring to Fig. 9, when entering the WTS mode, 1) in each end of conversation, 2) when lossing signal occurring, perhaps 3) will begin the WTS cache at this pcs handset 50 of cache scanning timer expired (for example every 60 seconds) and scan.If the WTS control channel (that is, having identical SID) that the scanning of WTS cache finds pcs handset 50 to be registered, then pcs handset 50 rests on the WTS working method of that WTS system.But, unsuccessful if suitable WTS control channel is sought in the scanning of WTS cache, perhaps when scanning timer expired (for example per minute) fully, then begin WTS shown in Figure 11 and scan fully.Be again that then pcs handset 50 rests in the WTS mode of that WTS control channel if find any WTS control channel that allows pcs handset 50 registrations.On the other hand, if do not find such channel, then pcs handset 50 enters the CMTS mode.

From Figure 10 and 11 apparent, the WTS cache is swept to scan fully to carry out with WTS and is substantially similar to the initial operation of scanning fully of initial cache scanner uni, except in the scanning of WTS ultrahigh speed, those channels (here reach in the accompanying drawings and be called " SID-P ") that the channel table search only conforms to the SID of registration at present to its SID.

Therefore in WTS cache scanning (Figure 10), pcs handset 50 scanning cache tables are also made channel table 94 (state 500), as the initial cache scanning of Fig. 7.But in WTS cache scanning, channel table 94 search are that (SID-P) meets the channel (state 510) of the SID of present registration to having SID.Select to have the channel (state 520) of SID-P of the highest RSSI then.If this channel number and present channel number are not inconsistent, then this channel number is added to cache table (state 530), and pcs handset 50 moves on on that stronger channel, but still is operated in (state 540) in the identical WTS system.If present channel is corresponding to the strongest SID-P channel, then pcs handset 50 remains on the WTS mode of that channel.Like this, pcs handset 50 preferably still is registered in present WTS system, even receive a stronger signal (it must have a different WTS SID) from an overlapping WTS system.

Similarly, in WTS scanned fully, pcs handset 50 also preferably remained among the WTS corresponding to the SID of present registration.But, in WTS scans fully,, but find WTS control channel with other SID if can not find the channel of the SID with present registration, then pcs handset 50 will be attempted not considering SID in the strongest WTS channel registration.

To obviously know from the state diagram shown in comprehensive consideration Fig. 6-11, when powering up or predetermined space after this, the realization of the channel table 94 of cache table 92 and by pcs handset 50 to its scanning guarantee (may the time) this pcs handset 50 is locked on the WTS control channel of a mandate apace, and do not utilize sweep time, because it will cause losing the paging of pcs handset 50.In addition, the performance that scans fully with long channel at interval (can be designed by the data of channel group size or other programmable value) guarantees that further cache table 92 WTS channel information with the mandate in the local zone in by the interval of scanning timer settings fully (for example 5 minutes) upgrades.

In a word, when powering up, pcs handset 50 is checked cache table 92 and is attempted seeking its registrable WTS channel.If unsuccessful, then it begins the initially scanning fully based on wideer all channels in channel group, and if find a WTS control channel that allows pcs handset 56 registrations, pcs handset 50 is transformed into the WTS mode.Otherwise it is transformed into the CMTS mode.

When in the CMTS mode, carry out cache in the WTS control channel periodically and scan fully attempting searching, if find a WTS control channel then be transformed into the WTS mode automatically.Otherwise when the WTS mode, pcs handset 50 is in ultrahigh speed scanning and the scanning fully of the execution cycle in the time interval of corresponding weak point and length.If find the channel that has corresponding to the SID of the SID of this WTS system, pcs handset 50 is registered in this WTS system at present, and then pcs handset 50 still is locked in that WTS the strongest interior control channel that it is registered.On the other hand, if do not find the SID of present registration, then pcs handset 50 execution WTS scan fully, and in this case, can find another WTS system of the different SID with the registration of allowing.Otherwise it enters the CMTS mode.

By going to realize the automated manner selectivity characteristic with top disclosed side, pcs handset 50 in case in a WTS registration will always attempt remaining operating in that WTS, and be not subjected to exist the influence of the stronger signal that starts from other overlapping WTS system.In addition, by bad SID inventory 96, the WTS that its registration request will not attempted scanning and refused in front to pcs handset 50 registers again.In addition, pcs handset 50 always is locked in the WTS of a mandate, if available, does not select the CMTS system.

Though narrated the present invention with reference to certain embodiments here, should understand that these embodiment only illustrate different aspect of the present invention and characteristic.Those skilled in the art can much revise the illustrative embodiment of narration here, and the arrangement that can design other is used to realize the present invention, and the scope that provides as the invention disclosed of claims is not provided.

Claims (14)

1. a telephone bandset that is used for both sides' formula is selected a kind of method of working method automatically, this telephone bandset is adapted to operate in cellular mobile telephone system (CMTS) and at least one radio telephone system (WTS), by using in the zone by described WTS service is those idle CMTS channels, this radio telephone system is shared the CMTS frequency band, it is characterized in that may further comprise the steps:

The previous WTS control channel that uses of storage in the table in the memory of described telephone bandset;

In described mobile phone, on the described channel of described table, carry out first scanning, to determine existing of one or several WTS control channel;

Registering request owing to send one from described mobile phone on one or several described WTS control channel that described first scanning is found;

Changing described mobile phone is operated in its control channel in described WTS mode and has accepted on the WTS of described registration request;

If described registration request all is rejected, utilize described telephone bandset to carry out second scanning of all CMTS channels, these CMTS channels may be as the WTS control channel to determine existing of a WTS control channel;

Because described second scanning is found on the described WTS control channel, send a registration request from described mobile phone;

Changing described mobile phone is operated on the WTS that its control channel has been received in registration request in described WTS mode; With

The registration request all is rejected as described, then changes described operating handset in described CMTS mode.

2. according to the method for claim 1, it is characterized in that described first and second scannings are carried out periodically.

3. according to the method for claim 2, it is characterized in that described first scanning is carried out more frequently than described second scanning.

4. according to the method for claim 1, it is characterized in that, the step that sends the registration request be on described WTS control channel with the received signal intensity of the described control channel that successively decreases in sequence, thereby a registration request at first sends to the strongest WTS control channel.

5. according to the method for claim 1, it is characterized in that the registration request does not send to the WTS control channel of before having refused the registration request of the described telephone bandset in the described zone.

6. method that both sides' formula telephone bandset automatically is converted to radio telephone system (WTS) working method from cellular mobile telephone system (CMTS) working method, by using in the zone of described WTS service is those idle CMTS channels, described WTS shares the CMTS frequency band, and described method is characterized in that may further comprise the steps:

(a) the previous WTS control channel that uses of storage in the table in the memory of described telephone bandset;

(b) in above-mentioned mobile phone, carry out first of described channel periodically and scan, so that determine the existence of a WTS control channel;

(c) registering request owing to send one from described mobile phone on the WTS control channel that described first scanning is found;

(d) the described mobile phone of conversion is operated in its control channel in described WTS mode and has accepted on the WTS of described registration request;

(e) if the registration request of step (c) all is rejected, carrying out periodically may be as second scanning of all CMTS channels of WTS control channel, to determine existing of a WTS control channel;

(f) registering request owing to send one from described mobile phone on the described WTS control channel that second scanning is found; With

(g) the described mobile phone of conversion is operated on the WTS that its control channel has been received in one of step (f) registration request in described WTS mode.

7. according to the method for claim 6, it is characterized in that described first scanning is carried out more frequently than described second scanning.

8. according to the method for claim 6, it is characterized in that, the step that sends the registration request is at described WTS control channel with the received signal intensity of the described WTS control channel that successively decreases in sequence, thereby a registration request at first sends to the strongest WTS control channel.

9. according to the method for claim 6, it is characterized in that a registration request does not send to the WTS control channel of before having refused the registration request of the described telephone bandset in the described zone.

10. method that both sides' formula telephone bandset automatically is converted to cellular mobile telephone system (CMTS) working method from radio telephone system (WTS) working method, by making in the zone of described WTS service is those idle CMTS channels, described WTS shares the CMTS frequency band, and described method is characterized in that may further comprise the steps:

(a) the previous WTS control channel that uses of storage in the table in the memory of described telephone bandset;

(b) in described mobile phone, carry out first scanning periodically at the described channel of described table, with the existence of (SID) the WTS control channel that conforms to the SID of that WTS of described mobile phone registration of determining to have system banner, described mobile phone remains on the strongest described WTS control channel that described first scanning is found in the WTS mode;

(c) carrying out periodically may be as second scanning of all CMTS channels of WTS control channel, to determine existing of a WTS control channel, described mobile phone remains in the WTS mode has the strongest described WTS control channel that a SID conforms to the SID of that WTS of described mobile phone registration;

(d) do not have the WTS control channel that a SID conforms to the SID of the WTS of described mobile phone registration if find in described second scan period, then registering request owing to send one from described mobile phone on one or several described WTS control channel that described second scanning is found, described mobile phone remains on the strongest WTS control channel of accepting described registration request in the WTS mode; With

(e) if all described registration requests are rejected, change described operating handset in described CMTS mode.

11. the method according to claim 10 is characterized in that, described first scanning is carried out more frequently than described second scanning.

12. method according to claim 10, it is characterized in that, sending described registration, to ask the step of described WTS control channel be with the received signal intensity of the described WTS control channel that successively decreases in sequence, thereby a registration request at first sends to the strongest WTS control channel.

13. the method according to claim 10 is characterized in that, a registration request does not send to the WTS control channel of before having refused the registration request of the described telephone bandset in described zone.

14. both sides' telephone bandset that is adapted to operate in a cellular mobile telephone system (CTMS) and at least one radio telephone system (WTS), by using in the zone of described WTS service is idle CMTS channel, WTS shares the CMTS frequency band, and described telephone bandset is characterized in that comprising:

Be used to store the memory of the WTS control channel table of previous use;

The device that is used to scan the table of storage and determines the existence of one or several WTS control channel thus;

On described control channel, send the device of a registration request;

Be used to receive a device that registration is accepted or refused that comes from described WTS control channel;

Control device is used for operating the described mobile phone that its control channel has been accepted a WTS of described registration request, if all described registration requests all are rejected, then described control device operates in the described mobile phone among the described CMTS.

Images