CN1106601A - Method and system by using wireless telephone to realize wandering and two-way calling - Google Patents
Method and system by using wireless telephone to realize wandering and two-way calling Download PDFInfo
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Abstract
The method for realizing roam and bidirectional calling in second generation cordless telephone system features that telephone number of each handset is corresponding to its inherent ID, the ID, wright and position mark of each handset are stored in primary station, the position of each handset is frequently search and new position is reported to control center for tracking each handset. The bidirectional CT2 system using said method has the advantages of simple structure, low cost and easy application.
Description
The invention belongs to the mobile communication technology field, particularly to the design improvement of cordless telephone generation 2 system.
CT2(the 2nd generation Cordless Telephone) be the abbreviation of cordless telephone generation 2.In May, 1989, Britain formulated CT2 Common Air Interface CAI (CAI, Common Air Interface) standard (MPT1375), in June, 1991 ETSI (ETSI) has passed through CT2 CAI standard (I-ETS 300 131).After this CT2 is used widely in areas such as Europe and Southeast Asia, and ground such as domestic Shenzhen, Fanyu, Ningbo, Dalian also come into operation.
CT2 adopts digital technology.CT2 CAI standard code radio-frequency (RF) index, data communication protocol and the speech coding mode etc. of radio communication between CT2 mobile phone and the base station, be described below respectively:
CT2 adopts frequency division multiple access (FDMA), and the 4MHz bandwidth (is generally 864.1～868.1MHz) and is divided into 40 channels at interval by 100KHz.Dynamics of channels is distributed, and is selected for use according to the signal to noise ratio quality by mobile phone and base station.Each channel is that unit divides time slot by 1ms, alternately be used for receiving and send out (time division duplex, TDD).The transmitting power of mobile phone and base station all is no more than 10mW, and communication distance is different because of environment, is generally about tens meters to 200 meters.
Data communication protocol is divided into physical layer, data link layer and message layer between CT2 base station and mobile phone, with seven layer data communication protocols of the OSI(Open Systems Interconnection) of International Standards Organization (ISO) suggestion low three layers consistent.It supports the bi-directional call between base station and mobile phone, and mobile phone can be called out base station and set up communication, and base station also can be set up communication by calling handset.Communication signaling is very abundant, and can expand.
Speech adopts the ADPCM coding, and speed is 32Kb/s.The synthetic code stream of speech and control information is modulated on the carrier frequency in the GMSK mode to be launched, and transmission rate is 72Kb/s.
The CT2 mobile phone has three kinds of operating states: communication, scan channel, free time.Communications status comprises processes such as setting up data link, conversation and release link.When not communicating by letter, mobile phone just is in the scan channel state, receives the signal on each channel circularly, detects to have or not the base station calling handset.For saving battery of mobile phone, general scan channel intermittently carries out, and inserts idle condition therebetween, stops transmitting-receiving etc., reduces power consumption.
The CT2 base station generally has two kinds of groundwork states: communication and scan channel.Base station needn't use battery, so needn't increase idle condition for saving energy.
Communication process between CT2 base station and the mobile phone is summarized as follows:
Each CT2 mobile phone all has unique identification code.During the handset call base station, a handset-selected idle channel, a kind of link request signal (LIND-REQUEST) that has the mobile phone logo sign indicating number of repeat its transmission.Base station receives the link request signal in channel scan procedure, differentiate calling subscriber's identity according to wherein mobile phone logo sign indicating number, checks with the base station database, checks its rights of using.After checking correctly, base station just replys the request of mobile phone.After this both sides set up data link, intercommunication signaling and voice data.Signaling also provides some secret algorithms, and base station can further be verified the identity and the authority of mobile phone with it.Cellphone subscriber's on-hook behind the end of conversation discharges data link.
During CT2 base station calling handset, base station is selected an idle channel, a kind of call signal (ID-OK) that has the mobile phone logo sign indicating number of repeat its transmission.Between this call signal, also accompany ring signaling (SIG) etc., press certain rhythm control cell-phone bell (rhythm normally loud 1 second, pause 4 seconds, sound and pause are determined by a certain position parameter of SIG signaling).Mobile phone detects the call signal of the identification code that has oneself in channel scan procedure after, beam back answer signal (ID-OK), and ring or pause under the control of thereafter ring signaling.After user's off-hook was replied, mobile phone sent link request signal (LINKREQUEST), sets up data link and communicates.Cellphone subscriber's on-hook discharges data link behind the sign off.
CT2 base station connected call line promptly constitutes common cordless telephone.In addition, all right construction system of CT2 can be made wireless phonebooth (Telepoint) and use on public switched telephone network (PSTN), perhaps constitute wireless user switch (Cordless PABX).During the CT2 construction system, except that base station and mobile phone, also need increase and charge or other network equipment, hereinafter referred to as network control (management) center.
CT2 system (being used for public network PSTN or private network PABX) generally is made of a plurality of base stations that are in diverse location, can cover bigger coverage.Be that service area is divided into some differential district, each differential district is provided with a base station, and the size in differential district is set at the communication range of base station and mobile phone.Can overlap between the differential district or isolated mutually.Each differential district and base station thereof constitute a position of CT2 system.The cellphone subscriber can move (roaming) in each position in service area, can make a phone call or answer the call in the same old way.When mobile phone was breathed out, system need carry out identification and Authority Verification.During the calling handset user, system will notify the mobile phone that is in certain position, and this is the key and the technological difficulties of two-way CT2 system.Because mobile phone location moves the restriction with network configuration, common CT2 system does not support bi-directional call, and mobile phone can only be breathed out, can not be called.Traffic information also need be pooled to the network control center, charges and traffic measurement.Introduce existing several typical ct findings 2 systems below.
First kind of CT2 system network architecture such as Fig. 1, by mobile phone 11, base station and network management center constitute, and link to each other with public switched telephone network.Mobile phone can only unidirectionally be breathed out, can not be called.Network management center carries out management and charge information, the traffic quantitative statistics etc. of base station.This system is the most general, makes with the most use.After this system carried out a little improvement, the cellphone subscriber gave advanced pedestrian worker's Login Register, can fixedly exhale the people near the base station at certain, and be still unidirectional exhalation in other place.The incoming call process is, the cellphone subscriber gives earlier the telephone number of institute's registration base station and mobile phone the extension on this base station and informs caller, and base station is put through in caller, dials phone number (two-stage dialing) again and gets final product.This system configuration is simple, and cost is low, but function is not strong, the incoming call of failing to solve well.
Second kind of CT2 system combines with radio paging system (BB machine).CT2 can only breathe out, and the BB machine can only incoming call.Both combinations promptly can bi-directional call.Fig. 2 illustrates a kind of such system.The CT2 system links to each other by " MEET-ME " switch with the wireless paging station, and the CT2 mobile phone is done with the BB machine and is in the same place, and can realize automatic bi-directional call like this.The corresponding fixing telephone number of each CT2 mobile phone, its office number is exactly the number of " MEET-ME " switch.Arrow and sequence number show the process of mobile phone called party among the figure, and the telephone number of 21 groups of called mobile phones 22 of caller is connected " MEET-ME " switch, and " MEET-ME " switch is notified called by radio paging system; Called terminal ringing is connected " MEET-ME " switch automatically behind the off-hook; Caller and called speech channel are connected at " MEET-ME " switch at last.
This systemic-function is stronger, but actual be two systems, cost is higher, and is also not high to the utilization ratio of public network (PSTN), once the conversation need take two the cover telephone lines.
The third typical C T2 system is the Bi-Bop system of France.It also has the bi-directional call function.By mobile phone 31, base station, zone controller, " MEET-ME " switch and database constitute, and link to each other with Packet Switch Data Network X.25 with public switched telephone network.Network configuration such as Fig. 3.The position of data-base recording CT2 mobile phone.After the cellphone subscriber breathed out or carries out once the login of artificial position, system was by base station, zone controller, X.25 net is this positional information input database.When mobile phone called party, " MEET-ME " switch checks in mobile phone location by net X.25 from database, notifies this mobile phone of base station pager of relevant position then; Mobile phone is replied the back speech channel and is connected at " MEET-ME " switch and caller.The characteristics of Bi-Bop system are to have adopted login of artificial position and Packet Switch Data Network X.25.Function is stronger, can incoming call, but the complicated network structure, the cost costliness.The artificial position login of being adopted, process is finished automatically, but position login process is each time all activated by manual operations such as the user make a phone call.This artificial position login has certain limitation, when the mobile subscriber does not make a phone call for a long time, can not follow the tracks of customer location practically.
The 4th kind of CT2 system is the Companion system of Canadian Northern Telecom (NT) company.It is a kind of wireless PABX, is made of CT2 and key system phone, as Fig. 4.It utilizes key system phone " group calling " function to realize calling to the CT2 mobile phone, and promptly one group of base station that is in diverse location is called out simultaneously by mobile phone 41, and this systemic-function is the strongest, can roaming, bi-directional call, handover.Shortcoming is the restriction that is subjected to key system phone, and capacity is very little; And adopt Digital Transmission between switch (PABX) and the base station, distance short (maximum 800 meters) is so the overlay area is also very little; And must be equipped with special-purpose key system phone, cost height.
The objective of the invention is to overcome the weak point of existing CT2 system, solve the technological difficulties of two-way CT2 system, a kind of realization roaming of CT2 system and new method of bi-directional call of being used for proposed, constitute a kind of new CT2 system according to this new method with roaming and bi-directional call function, characteristics such as and it is simple to have network configuration, and equipment cost is low.
The present invention proposes the method that a kind of CT2 of being used for cordless telephone system is realized roaming and bi-directional call, may further comprise the steps:
Diverse location is provided with a plurality of base stations that have database in certain zone, a plurality of mobile phones of in this zone, roaming, and one has the network control center of database and the telephone network that links to each other with said base station, control centre;
It is corresponding with its intrinsic identification code that said each mobile phone is set a telephone number;
Whether the corresponding mobile phone of identification code, rights of using and expression that the database storage of said each base station has said each mobile phone tick lables in the communication distance of this base station;
Telephone number, identification code and the current location of each mobile phone of database storage of the said network control center, and by automated location login each mobile phone location is upgraded, follow the tracks of the variation of mobile phone location;
When mobile phone is breathed out, send the link request signal that has the self identification sign indicating number, near the base station this mobile phone receive and with its database in this cellphone information check correct after, connect telephone line, the user can make a phone call;
During calling handset, said telephone network is at first connected the said network control center, this center is according to by the telephone number of calling handset, from its database, find the current position of this mobile phone, again calling is transferred to the base station of relevant position, this base station is called out the called mobile phone of corresponding telephone number with identification code, connects the speech channel conversation behind user's off-hook.
Below the method for the invention related content is described further:
Mobile phone among the present invention is the general mobile phone that meets CT2 CAI standard, and telephone number of each handset allocation is corresponding one by one with the mobile phone logo sign indicating number.The network control center is provided with a database, writes down the current location of each mobile phone.Each base station also has a database, writes down identification code, the rights of using of each mobile phone and whether (is called tick lables later on) near this base station.
When mobile phone is breathed out, near base station response, carry out identification and Authority Verification after, connect telephone network, the user can communicate.
During calling handset, at first be switched to the network control center.The network control center finds the current position of mobile phone according to the telephone number of called mobile phone from database, calling is transferred to the base station of relevant position.Base station is just called out the called mobile phone of corresponding telephone number with the mobile phone logo sign indicating number later on, connects speech channel communication behind called subscriber's off-hook.
Traffic information (comprising mobile phone incoming call exhalation) by the base station blotter, is pooled to the network control center by telephone line termly.Data are compiled can be once a day, night telephone traffic hour carry out.
The database of the network control center is along with the variation of mobile phone location is often upgraded, and this process is called the position login.The automated location login is a core of the present invention, may further comprise the steps:
When said each base station was not communicated by letter, timesharing was searched for a plurality of mobile phones respectively, i.e. emission has the call signal of mobile phone logo sign indicating number;
Corresponding mobile phone is received call signal if near this base station, then beams back answer signal, after this base station is received answer signal, writes down the new tick lables of this mobile phone;
Inequality when the tick lables that this mobile phone of the reposition sign of this record and base station database storage is old, then the reposition sign is replaced old tick lables;
Each base station sends the new positional information of mobile phone to the said network control center at regular intervals, makes that the original position data of corresponding mobile phone is capped replacement in this central database;
Above steps periodically circulates repeatedly and carries out.
The said base station of the present invention also can according to priority carry out mobile phone searching, and promptly each base station is pressed the priority principle ordering with each mobile phone, the preferential search time that guarantees the mobile phone that priority is high in a position login cycle.
The said automated location login of the present invention also can be equipped with the login of artificial position, and said manual entry is after a cellphone subscriber roams into a reposition, initiatively opens near the base station of handset call; This base station detects the change in location of this mobile phone of record after the calling of mobile phone, and notifies the said network control center to revise the position data of this mobile phone.
Down position logging method of the present invention is described in detail as follows:
CT2 CAI standard was done introduction in front, and itself does not have the position login feature.The present invention utilizes CT2 CAI predetermined data communication agreement to realize the position login, keeps the compatibility with CT2 CAI standard simultaneously.Base station among the present invention has increased a kind of operating state than common CT2 base station, promptly comprises three operating states: communication, scan channel and search.When base station was not communicated by letter, timesharing was alternately searched for and scan channel.Alternate cycle is called the search cycle, and the time of each search is called search time.Search procedure and base station calling handset are similar.Base station selects (or one a group) mobile phone as object search, at first select an idle channels, on this channel, launch call signal (ID-OK) repeatedly, accompany ring signaling (SIG) between the call signal, ring signaling herein allows mobile phone No ringing (realizing by the parameter of setting the SIG signaling) all the time.Corresponding mobile phone then can be beamed back answer signal (ID-OK) as (base station is exhaled mobile phone) usually in this way near this base station and receive call signal, but can ring.The user generally just can off-hook yet, and mobile phone can not ask to set up data link yet.Base station is just noted after receiving the answer signal (ID-OK) of mobile phone, and interrupts the search to mobile phone.This result is called base station and searches this mobile phone, otherwise does not promptly search.
Search Results is regularly handled, and the processing cycle is called the position login cycle.Processing method is, position in the login cycle Search Results and the mobile phone location sign in the base station database compare, if searched arriving of mobile phone, and its tick lables is not near this base station, be that this mobile phone is the communication range of having come to enter this base station from the other places roaming, mobile phone location sign in then base station process telephone line informing network control centre, and the modification base station database; If mobile phone does not have searched arriving, and tick lables be mobile phone near this base station, promptly this mobile phone may leave this base station area of coverage, then base station changes tick lables, but needn't informing network control centre; If mobile phone searched to and tick lables is near this base station, perhaps mobile phone do not have searched to and tick lables be mobile phone not near this base station, then this mobile phone does not relatively change this base station position, disregards.
The network control center obtains the position log-on message that base station is sent from telephone line, the position of revising corresponding mobile phone in the database in view of the above, and old position data is capped, is substituted.Like this, location database just can be from the variation of motion tracking mobile phone location.
A position login cycle may comprise a plurality of search cycles, also just can repeatedly search for a plurality of mobile phones in a position login cycle.For the little system of capacity, total number of users is few, can choose suitable login cycle and search cycle, makes base station all search for all mobile phones some times in a login cycle.
For the bigger system of capacity, base station is searched for whole mobile phones one by one to be needed for a long time, may not accomplish in a login cycle.In a login cycle, select the object of which mobile phone, need a strategy as search.The present invention adopts the priority method, on each base station all mobile phones is divided into two or more priority levels.In a login cycle, base station elder generation search high-priority mobile phone, after each high priority mobile phone was all searched for certain number of times, the mobile phone of search lower priority in remaining time.Priority level can be by following policy setting: the one, and according near the frequency that the cellphone subscriber occurs this base station position, for example mobile phone should be made as higher priority at the base station of its user job or place of abode, and can be made as lower priority at other base station; The 2nd, according to cellphone subscriber's characteristics and requirement, as some VIPs, there is the people of special requirement on the part or all of base station of a system, all to be made as higher priority.
The automated location login also can be used in combination with the login of artificial position.The login of artificial position is after the cellphone subscriber roams into a new position, initiatively opens near the base station of handset call, exhales logical back on-hook (also can dial a phone if desired).Base station is noted after the calling that detects mobile phone, and when a position login of sign off after image end cycle, handle like that, if promptly the tick lables of this mobile phone in the base station database is not near this base station, this mobile phone is come from the other places roaming so, then base station informing network control centre location revision database.The login of artificial position can be used as replenishing of automated location login.
The present invention proposes is used for the new method that the CT2 system realizes roaming and bi-directional call, has overcome outside the deficiency of existing CT2 system, has solved the technological difficulties of two-way CT2 system.Adopt the two-way CT2 system of this new method to have advantages such as network configuration is simple, equipment cost is low, and be fit to the characteristics of Chinese existing telephone network.The international standard of the complete symbol CT2 of the mobile phone that is adopted, general with other CT2 systems, can give full play to the characteristics of CT2 mobile phone a tractor serves several purposes, the user holds a mobile phone, just can stay at home (family expenses CT2), office (CT2 PABX) and public place (CT2 Telepoint) use, and be very convenient.
Brief Description Of Drawings:
Fig. 1 is existing the most universal a kind of CT2 system network architecture schematic diagram;
The schematic network structure that Fig. 2 combines with radio paging system for existing CT2 system;
Fig. 3 is existing French Bi-Bop CT2 system network architecture schematic diagram
Fig. 4 is the existing Canadian NT CT2 of company system network architecture schematic diagram;
Fig. 5 is for adopting a kind of two-way CT2 system embodiment schematic network structure of the method for the invention.
The present invention proposes a kind of two-way CT2 system embodiment that adopts said method, and its network configuration as shown in Figure 5.Comprise many CT2 base stations that are arranged on diverse location, a plurality of CT2 mobile phones 51 in the roaming of said different base stations position, a network control center, it is characterized in that also comprising the subscriber exchange or the end office switch of calling out signaling transfer point that have that has the part wire user, adopts the dual-tone multifrequency system, said CT2 base station, the network control center link to each other with said switch by subscribers feeder.CT2 base station, the same assign telephone numbers with telephone of the network control center, the CT2 mobile phone is then independently worked out number (hereinafter referred to as phone number).
The present embodiment course of work is described below:
Need through two-stage dialing to make a phone call for the CT2 mobile phone, the network control center is at first put through in caller (mobile phone or wire user), and then dials phone number.Phone number is received by the network control center.The network control center checks in the identification code and the current position of called mobile phone from database, flash the hook holding calling, put through the base station of relevant position, and carry out data communication by touch-tone signal or modulator-demodulator, the mobile phone that the notice base station will be called out is hung up circuit then and is finished the calling switching.Caller this moment and base station are connected, the base station calling handset.After replying, promptly connects by mobile phone with caller.
When mobile phone was breathed out, base station directly carried out identification and Authority Verification, transmits mobile phone then and dials the number (pulse or dual-tone multifrequency mode), directly connects called through switch.
Base station can be put through the network control center, carries out data communication by touch-tone signal or modulator-demodulator, carries out the position login, reports traffic information etc.
It is as follows that present embodiment has related parameter to be provided with: the position login cycle was made as 10 minutes, and the search cycle was made as 10 seconds, was made as search time 1 second.The base station number is 30, and each base station comprises two cover transceivers, connects two telephone lines.Control centre connects 4 telephone lines.Switch provides 64 telephone lines.Cell phone capacity can reach 100.
The described CT2 of present embodiment system has roaming and bi-directional call function, and network configuration is simple, and equipment cost is low, is fit to China's national situation.
The characteristics of inland telephone network are that a lot of departments and unit all have SPC PBX.If internal institution constitutes above-mentioned CT2 system with the part telephone line, need not to change switch, cordless telephone service can be provided, satisfy the requirement of internal institution mobile communication.
The end office switch of local telephone network (program control) also can be the dual-tone multifrequency system and have the calling signaling transfer point, can constitute the CT2 system of above-mentioned network configuration equally, as shown in Figure 5.Such system is applicable to the city or the samll cities and towns of big and medium-sized cities.
Claims (5)
1, a kind of method that is used for CT2 cordless telephone system realization roaming and bi-directional call may further comprise the steps:
(1) diverse location is provided with a plurality of base stations that have database in certain zone, a plurality of mobile phones of in this zone, roaming, and one has the network control center of database and the telephone network that links to each other with said base station, control centre;
(2) telephone number of said each mobile phone setting is corresponding with its intrinsic identification code;
(3) database storage of said each base station the corresponding mobile phone of identification code, rights of using and the expression tick lables in the communication distance of this base station whether that said each mobile phone arranged;
(4) telephone number, identification code and the current location of each mobile phone of database storage of the said network control center, and by automated location login each mobile phone location is upgraded, follow the tracks of the variation of mobile phone location;
When (5) mobile phone is breathed out, send the link request signal that has the self identification sign indicating number, near the base station this mobile phone receive and with its database in this cellphone information check correct after, connect telephone line, the user can make a phone call;
(6) during calling handset, said telephone network is at first connected the said network control center, this center is according to by the telephone number of calling handset, from its database, find the current position of this mobile phone, again calling is transferred to the base station of relevant position, this base station is called out the called mobile phone of corresponding telephone number with identification code
Connect the speech channel conversation behind user's off-hook.
2, method according to claim 1 is characterized in that said automated location login may further comprise the steps:
When (1) said each base station was not communicated by letter, timesharing was searched for a plurality of mobile phones respectively, i.e. emission has the call signal of mobile phone logo sign indicating number;
(2) corresponding mobile phone is received call signal if near this base station, then beams back answer signal, after this base station is received answer signal, writes down the new tick lables of this mobile phone;
(3) inequality when the old tick lables of this mobile phone of the reposition sign of this record and base station database storage, then the reposition sign is replaced old tick lables;
(4) each base station sends the new positional information of mobile phone to the said network control center at regular intervals, makes that the original position data of corresponding mobile phone is capped replacement in this central database;
(5) above steps periodically circulates repeatedly and carries out.
3, method as claimed in claim 2 is characterized in that said base station according to priority carries out mobile phone searching, and promptly each base station is pressed the priority principle ordering with each mobile phone, the preferential search time that guarantees the mobile phone that priority is high in a position login cycle.
4, as claim 1,2 or 3 described methods, it is characterized in that said automated location login is also with addition of logining with artificial position, said manual entry is after a cellphone subscriber roams into a reposition, initiatively open near the base station of handset call, this base station detects the change in location of this mobile phone of record after the calling of mobile phone, and notifies the said network control center to revise the position data of this mobile phone.
5, a kind of employing claim 1,2,3 or 4 described two-way CT2 systems, comprise many CT2 base stations that are arranged on diverse location, a plurality of CT2 mobile phones in the roaming of said different base stations position, a network control center, it is characterized in that also comprising the subscriber exchange or the end office switch of calling out signaling transfer point that have that has the part wire user, adopts the dual-tone multifrequency system, said CT2 base station, the network control center link to each other with said switch by subscribers feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94101492 CN1106601A (en) | 1994-03-04 | 1994-03-04 | Method and system by using wireless telephone to realize wandering and two-way calling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94101492 CN1106601A (en) | 1994-03-04 | 1994-03-04 | Method and system by using wireless telephone to realize wandering and two-way calling |
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| CN1106601A true CN1106601A (en) | 1995-08-09 |
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| CN 94101492 Pending CN1106601A (en) | 1994-03-04 | 1994-03-04 | Method and system by using wireless telephone to realize wandering and two-way calling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108065C (en) * | 1995-07-10 | 2003-05-07 | 摩托罗拉公司 | Flexible mobility management in two-way messaging system and method therefor |
| CN100459796C (en) * | 2005-06-09 | 2009-02-04 | 华为技术有限公司 | Method signing contract of admission random zone for terminal apparatus |
| CN101262525B (en) * | 2007-06-20 | 2010-09-29 | 中兴通讯股份有限公司 | Method and system for translating the call of numbers in a group to a mobile number into calls in a group |
| CN104718786A (en) * | 2012-10-15 | 2015-06-17 | 高通股份有限公司 | Controlling communications between a mobile device and a base station |
-
1994
- 1994-03-04 CN CN 94101492 patent/CN1106601A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108065C (en) * | 1995-07-10 | 2003-05-07 | 摩托罗拉公司 | Flexible mobility management in two-way messaging system and method therefor |
| CN100459796C (en) * | 2005-06-09 | 2009-02-04 | 华为技术有限公司 | Method signing contract of admission random zone for terminal apparatus |
| CN101262525B (en) * | 2007-06-20 | 2010-09-29 | 中兴通讯股份有限公司 | Method and system for translating the call of numbers in a group to a mobile number into calls in a group |
| CN104718786A (en) * | 2012-10-15 | 2015-06-17 | 高通股份有限公司 | Controlling communications between a mobile device and a base station |
| CN104718786B (en) * | 2012-10-15 | 2017-04-19 | 高通股份有限公司 | Controlling communications between a mobile device and a base station |
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