CN101404814B - Automatic provisioning of admission policy for femtocell - Google Patents
Automatic provisioning of admission policy for femtocell Download PDFInfo
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- CN101404814B CN101404814B CN200810212982.5A CN200810212982A CN101404814B CN 101404814 B CN101404814 B CN 101404814B CN 200810212982 A CN200810212982 A CN 200810212982A CN 101404814 B CN101404814 B CN 101404814B
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Abstract
The invention provides a method for establishing permission strategy of accessing point base station, a millimicro micro-honeycomb base station, a method for executing automatic supply for the accessing point base station, and a communication system for providing radio communication to one or more accessing terminals. The accessing point base station or the automatic supply method for the millimicro micro-honeycomb base station includes millimicro micro-honeycomb base station, for example, first information (such as position information, signal measuring signal and performance signal) is sent to service provider through IP network. The millimicro micro-honeycomb base station can receive second information from the service provider, wherein the second information includes one or more operation parameter. The operation parameter can include switching parameters, permission strategy information, PN or scrambling code, power parameters and/or other parameters. The millimicro micro-honeycomb base station can operate according to received parameters and provides access for a plurality of access terminal in local region.
Description
Technical field
The present invention relates to cellular network art, relate to the automatic supply (provision) of femtocell (femtocell) base station particularly.
Background technology
In recent years, the use of mobile device, particularly cellular telephone usage quantity increases sharply, and makes the reception for cellular telephone or other mobile device, and the concern of the cellular telephone especially in family or main residence or the reception of other mobile device increases.In addition, the user of mobile device can use or subscription data business usually in the family, and therefore femtocell (being commonly referred to access point base station) is also introduced into family and is used for providing cellular service to the mobile device of the usage data service of user.These femtocells can be that the planning of frequent usage data is served (such as, digital subscriber line (DSL), optical fiber, wireline cable (Cable), micro-wave access global inter communication (WiMAX) etc.) mobile device very quality services are provided, and do not need cellular telephone service provider to provide the macrocellular closed on.But femtocell needs manual setting (such as, being arranged by technician) usually, so that valid function.Thus, the installation improving femtocell is expected.
Summary of the invention
The present invention proposes each embodiment of the method for automatically supplying access point base station (as femtocell).
The present invention proposes for automatically supplying access point base station (as femtocell) to reduce each embodiment of the method for the interference of access point base station.
Access point base station can provide radio communication in wireless zone, and service provider such as can provide radio communication by macro base station in grand region.This access point base station can comprise the interface with one or more wired or wireless ports, for being couple to wide area network and/or access terminal (such as, mobile device).In addition, this access point base station can comprise one or more processor and realize the memory of each process following.
This access point base station can provide radio communication in local zone.In certain embodiments, this access point base station can to such as performing one or more measurements by this one or more signal (such as, signal strength signal intensity) provided that accesses terminal.
This access point base station can be passed through wired connection (such as, the IP on wide area network connects) and be connected to service provider, and sends the first information.This first information can comprise the out of Memory of positional information, performance information, metrical information and/or access point base station.This performance information can comprise the propagation characteristic of the environment residing for this access point base station.
Responsively, this access point base station receives the second information from this service provider.This second information can comprise one or more operation or provision parameter, and it can be determined based on the first information provided by this access point base station.In one embodiment, the plurality of parameter can comprise at least one switching (handoff) parameter.This at least one handoff parameter can comprise macro base station to tap (drop) threshold value of access point base station and access point base station to the tap threshold value of macro base station.In certain embodiments, this second information and/or handoff parameter can comprise delayed (hysteresis) information.The position of this access point base station in this grand overlay area can not be considered and determine or this handoff parameter/lag information is provided.This handoff parameter can be determined based on this positional information, performance information and/or metrical information.
In addition, the plurality of parameter can comprise power parameter, such as maximum power transfer parameter.Maximum power transfer parameter can define the overlay area (such as, local zone) of access point base station.In certain embodiments, power parameter (such as, maximum power transfer parameter) can comprise the power division of one or more overhead channels of information or definition access point base station.This power parameter can position-based information, performance information and/or metrical information and out of Memory be determined.In certain embodiments, this one or more operating parameter (such as power transmission parameter or handoff parameter) can be determined based on overlay area propagation model.
Correspondingly, this access point base station can operate based on one or more operating parameter.Operation based on operating parameter can reduce the interference that produced by access point base station and/or can allow effectively to switch between macro base station and access point base station.
Such as, this access point base station can receive the signal strength information accessed terminal coming from and move to local zone from grand region.When this signal strength information indicates the signal strength signal intensity of this access point base station to reach macro base station to the tap threshold value of access point base station, this access point base station can send handover request to service provider.Correspondingly, this handover request can make to access terminal and bring into use this access point base station (such as, by removing macro base station from the activation set accessed terminal).Similarly, this access point base station can receive the signal strength information accessed terminal coming from and move to grand region from local zone.When this signal strength information indicates the signal strength signal intensity of this macro base station to reach access point base station to the tap threshold value of macro base station, this access point base station can send handover request to service provider.Correspondingly, this handover request can make to access terminal and bring into use this macro base station (such as, by removing access point base station from the activation set accessed terminal).
This second information can also comprise license (admission) strategy (policy) information, and it comprises admission policy pattern, and what specify in the middle of the opening of the resource of access point base station, limited or privately owned access is one or more.In addition, this admission policy information can comprise service priority parameter, is used to specify multiple service priority accessed terminal.The method can comprise: access point base station receives user's input of specifying the list accessed terminal; And the access point base station list that uses this to access terminal and admission policy pattern determine the access of access point base station.But the list accessed terminal can provide in the second information.Alternatively, or in addition, user can such as use first to access terminal input password thus to be added on terminal list (such as, receive this first mark accessed terminal by access point base station and be stored in storage medium), or receive the authority accessed terminal in list.
In one embodiment, this access point base station can use the list that accesses terminal and related service priority parameters to determine the two at least one following: 1) to the access of access point base station; Or 2) to the access priority of access point base station.In addition, or alternatively, can comprise based on the operation of parameter and be provided to based on parameter (such as, based on admission policy information) access accessed terminal.
In one embodiment, when admission policy mode parameter indicates privately owned pattern, this access point base station only can allow the resource of access terminal communication or use access point base station in list.In a tethered mode, can make accessing terminal in list that those the high priority that access terminal than not accessing terminal in list at this can be utilized to carry out communicating or use this access point base station with access point base station.
In response to the change (may be maybe the change of admission policy) of network, access point base station can receive the operating parameter of renewal from service provider, and correspondingly based on this renewal operating parameter and operate.The parameter of this renewal can comprise the power parameter, handoff parameter, admission policy parameter (or pattern) etc. of renewal.Operate interference that similar operation can reduce to be caused in the network changed by access point base station to above-mentioned operating parameter based on upgrading and/or the more effective switching in the network of change is provided.When the parameter of this renewal relates to admission policy (such as, pattern or the list that accesses terminal), the information that this access point base station can upgrade based on this is provided to the access and/or service that access terminal.
Thus, this access point base station can automatically be configured based on the first information sent by this access point base station.
Accompanying drawing explanation
When accompanying drawing below combining is to consider the detailed description of the preferred embodiment of the present invention, can obtain better understanding of the present invention, wherein:
Fig. 1 is the exemplary system comprising access point base station according to an embodiment;
Fig. 2 is the schematic general diagram of the access point base station according to an embodiment;
Fig. 3 is the flow chart of the exemplary process for automatically supplying access point base station according to an embodiment;
Fig. 4 is the Zone switched figure that a macro base station according to an embodiment and an access point base station are shown;
Fig. 5 is the figure illustrated according to a macro base station of an embodiment and the coverage of two access point base station;
Fig. 6 is the flow chart performing the exemplary process of switching between a macro base station and an access point base station according to an embodiment;
Fig. 7 is the figure corresponding with the method for Fig. 6 according to an embodiment;
Fig. 8 is the flow chart performing the exemplary process of switching between an access point base station and a macro base station according to an embodiment;
Fig. 9 is the figure corresponding with the method for Fig. 8 according to an embodiment; And
Figure 10 is the flow chart of the exemplary process for illustrating the admission policy according to an embodiment.
Although the present invention allows various amendment and alternative form, show its specific embodiment in an illustrative manner in accompanying drawing and be described in detail here.But, be to be understood that, here accompanying drawing and detailed description are not intended to limit the invention to concrete form disclosed herein, but on the contrary, this invention is intended to cover all modifications, the equivalence within the spirit and scope of the present invention that fall into and be defined by the appended claims and replace.
Embodiment
Term
Here is the application's nomenclature used:
Any one in storage medium-various storage arrangement or storage device.Term " storage medium " is intended to comprise: install medium, as CD-ROM, diskette 1 04 or magnetic tape equipment, computer system memory or random access memory, as dynamic random access memory (DRAM, Dynamic RandomAccess Memory), Double Data Rate dynamic random access memory (DDR RAM, Double DataRate Random Access Memory), static RAM (SRAM, Static RandomAccess Memory), growth data exports random access memory (EDO RAM, Extended DataOutput Random Access Memory), the direct random access memory of bus (Rambus RAM, Rambus Direct Random Access Memory) etc. random asccess memory etc., or the nonvolatile memory of the such as magnetizing mediums such as hard disk drive or optical memory.This storage medium also can comprise the memory of other type or the combination of these memories.In addition, this storage medium can be arranged in the first computer of executive program, or can be positioned at the second different computer being connected to the first computer by the network of such as internet.In the case of the latter, second computer can provide program command for execution to the first computer.Term " storage medium " can comprise two or more storage medium, and they can be positioned at different positions, as being positioned at the different computer places connected by network.
Programmable hardware element-comprise various hardware unit, this hardware unit comprises the multiple programmable function blocks connected by programmable interconnect.Example comprises field programmable gate array (FPGA, FieldProgrammable Gate Arrays), programmable logic device (PLD, Programmable LogicDevice), field-programmable Target Aerial Array (FPOA, Field Programmable Object Array) and complex programmable logic device (CPLD, Complex Programmable Logic Device).Programmable functions module can from the such as fine particle such as combinational logic circuit or look-up table to the coarse granule such as ALU or processor core not etc.Also programmable hardware unit can be called " reconfigurable logic ".
Program-term " program " is intended to the complete coverage with its common meaning.Term " program " comprises 1) can store in memory and the software program or 2 that can be performed by processor) can be used for the hardware configuration program of configurating programmable hardware element.
Software program-term " software program " is intended to the complete coverage with its common meaning, and comprises and can be stored in storage medium and the combination of any one or they in program command, code, script and/or the data that can be performed by processor.Exemplary software program comprises: the program of writing with text based programming language, as C, C++, Pascal, Fortran, Cobol, Java, assembler language etc.; Graphic package also comprises (graphic package write with graphical programming language); Assembly language program(me); Be compiled into the program of machine language; Script; With other type can executive software.Software program can comprise two or more software programs crew-served in some way.
Hardware configuration program-can be used in is programmed or the program of configurating programmable hardware element, as net table or bit file.
Any one in computer system-various calculating or treatment system, comprise personal computer system (PC), large computer system, work station, the network equipment, internet device, personal digital assistant, television system, computing system or miscellaneous equipment, or the combination between these equipment.In general, term " computer system " can be defined as widely to contain and have at least one execution from the arbitrary equipment of the processor of the instruction of storage medium or the combination of equipment.
the schematic block diagram of Fig. 1 and 2-communication system
Fig. 1 shows the exemplary system comprising an access point base station (as femtocell).Term " access point base station " be intended to comprise those skilled in the art understand for femtocell, base station from home, individual access point (PAP, personal access point) and the individual second generation-third generation or n-th generation base station and other typical definition.In certain embodiments, access point base station can comprise the function of mobile radio station transmitter/receiver (i.e. transceiver), and other function will described in detail below.Be provided for the various embodiments such as by providing suitable operating parameter automatically to supply the method for (that is, arranging) access point base station below.
As shown in the figure, Fig. 1 shows one family, its can comprise one or morely access terminal 110, access point base station 120 and broadband device 130.As shown in Figure 2, access point base station 120 can comprise base station circuitry 200, and it can be couple to mobile radio station transceiver circuit 250.Base station circuitry 200 and/or mobile radio station transceiver circuit 250 can comprise or be couple to processor (not shown) and couple to realize the memory (not shown) of their function with this processor.In one embodiment, each in base station circuitry and mobile radio station transceiver circuit all can have independently processor and memory.Certainly, these assemblies also can share processor and memory.
As illustrated in fig. 1 and 2, base station circuitry 200 and mobile radio station transceiver circuit 250 can be contained in the same frame of access point base station 120.This frame can be plastics or metal (as aluminium or other metal), and can according to cartridge design.In one embodiment, this frame can comprise one or more lamp or light-emitting diode (LED), be used to refer to activity or the operation of each assembly of access point base station 120, such as, indicate the operation of base station circuitry 200 and/or mobile radio station transceiver circuit 250 and miscellaneous equipment.
Frame can comprise the power supply for providing the energy to the assembly of access point base station 120.Frame also can comprise one or more port for coupling miscellaneous equipment or communication equipment.Such as, in one embodiment, frame can comprise USB (USB) port, or the port of other type such as such as live wire, for connecting the equipment such as such as printer, personal music player, personal digital assistant, cell phone, external hard disk driver, testing equipment, media controller.In addition or alternatively, this one or more port can comprise ethernet port (such as being couple to router or communication equipment 130 and miscellaneous equipment), fiber port, cable port etc.In certain embodiments, these ports may be implemented as the interface or the interference networks that are couple to miscellaneous equipment via wired or wireless connection.
Access point base station 120 can receive from one or more access terminal 110 radio communication, such as radio frequency (RF) communication, and for access terminal 110 mobile operator corresponding to provider or cellular service provider corresponding signal or communication are provided.More particularly, access point base station 120 can carry out operating to use wideband Communication apparatus 130 by IP wide area network 150, such as by the Internet of the ISP (ISP, Internet service provider) of user, 110 provide communication for accessing terminal.Thus broadband device 130 can be communicated with cellular service provider 160 by the Internet.
In addition, IP wide area network 150 can by using various technology privately owned or proprietary by user, and these technology are leased lines, frame relay, Digital Subscriber Line (DSL) or dial-up service such as.If IP wide area network 150 can be supported, can also encryption IP communication or use IP tunnel.Outside the coverage in access point base station 120 and/or when access point base station 120 is invalid or do not operate, cellular service provider 160 still 110 can provide service by macro base station 170 (sometimes can be described as cell phone control tower or the macrocellular station) for accessing terminal.Therefore, access point base station 120 can provide two-way communication by the IP network of such as the Internet for accessing terminal.In other words, domestic consumer can use the cell phone carrying out with access point base station communicating, and the voice communication of user can be send/receive to/from cellular service provider by IP network.
Mobile radio station transceiver circuit 250 can use the radio honeycomb communications such as such as radio frequency 110 to communicate with honeycomb control tower 170 with accessing terminal.But it should be noted that in certain embodiments, mobile radio station transceiver circuit 250 can not directly 110 to communicate with accessing terminal; On the contrary, can by another assembly of such as base station 200 receive from access terminal 110 signal.Mobile radio station transceiver circuit 250 may be used for loopback test, and report environmental parameter, and also can be used for when IP network can not operate providing redundancy feature, thus the honeycomb improved in family receives.Therefore, in certain embodiments, mobile radio station transceiver circuit 250 may be used for the environmental parameter (radio service etc. in such as adjacent macrocell base stations, adjacent femtocell, family) of monitoring access point base station 120, and the information can transmitted for configuring access point base station 120, such as, as required by information that macrocell base stations or IP network provide to service provider.Arranging period can be most important in the initialization (such as, automatic) of access point base station 120 for this information.Correspondingly, during installation access point base station 120, macro base station 170 and/or service provider 160 can carry out communicating to perform (such as automatically) setting operation with access point base station 120 by wide area network 150.Mobile radio station transceiver circuit 250 also may be used for the test initialization (as loopback test) of access point base station 120, as in response to the signal from macro base station 170.
(also referred to as the mobile terminal) 110 that access terminal can comprise the equipment that may be used for as any type in the cellular network of radio communication.Access terminal and 110 can comprise cellular telephone (comprising intelligent telephone set), there is the personal digital assistant (PDA) of mobile communication ability, the laptop computer with mobile communication assembly or computer system and/or other anyly can carry out with cellular network the equipment that communicates.This accesses terminal and can use various different agreement, as CDMA2000 (first generation RTT and EV-DO), UMB, UMTS, LTE, WiMax or other agreement.Thus, access point base station can support to access terminal at least one subset and need not revising of any one or these agreement of 110 agreements used supports existing these standards of accessing terminal or agreement.
Broadband device 130 can comprise router and/or wired/DSL modulator-demodulator, for being connected to wide area network 150.In one embodiment, broadband device 130 can comprise wireless router, or one or more wireless hub, and it can provide for access point base station 120 radio communication such as using the 802.11x communication technology.In addition, broadband device 130 can be connected to wide area network 150 by the wireless means of such as wired, the wired mode such as DSL, optical fiber, power line or such as WiMAX or other communication as required.In addition, broadband device 130 also such as can be couple to access point base station 120 by WiMAX wireless connections are long-range.In addition, in one embodiment, such as, in one-stop (all-in-one) solution of user, access point base station 120 can comprise broadband device 130.
Thus, access point base station 120 can use broadband device 130 to be wire or wirelessly provided to the access of cellular network by the wide area network 150 as the Internet, and can comprise mobile radio station transceiver 250.
the automatic supply of Fig. 3-access point base station
Fig. 3 shows the exemplary process for automatically supplying access point base station.Method shown in Fig. 3 can be combined with any one or miscellaneous equipment of the computer system above shown in figure or equipment.In various embodiments, the certain methods key element shown in figure can be carried out simultaneously, carry out according to the different order outside indicating in figure or omit some key element wherein.Also additional method key element can be performed as required.As shown in the figure, the method can as described belowly be carried out.In the following description, " access point base station " mentioned refers to access point base station 120.
In step 302, access point base station can such as may be installed at home by user.But, can be installed by service provider technician or other entity as required.The installation of access point base station can comprise to be provided power supply to access point base station and such as uses wired or wireless mode that access point base station is couple to wideband Communication apparatus.In certain embodiments, user can be only needed to provide power supply for access point base station and access point base station is couple to broadband device.In other embodiments, can need further to connect setting, such as, the wireless of access point base station or network settings are set.In addition, in certain embodiments, a new position installation can be adjourned in mobile access point base station from old installation site.In this example, if received such information (such as, the acquisition identification information in step 306) from previously install, then the one or more steps in following step can not have been performed when adjourning new installation site.
Access point base station can be arranged in the grand region of macrocell base stations or at this grand areas adjacent, this macrocell base stations in grand region for service provider provides radio communication.Thus, access point base station can for service provider provides radio communication in access point base station overlay area (also referred to as local zone), and this access point base station overlay area may in the macro base station coverage area provided by macro base station (also referred to as grand region) or crossing with grand area part.Fig. 4 shows figure corresponding to situation therewith.As shown in the figure, access point base station overlay area is within macro base station coverage area.The region indicated is the region that can switch between access point base station and macro base station, such as, switch based on signal strength signal intensity.There is provided further describing switching flow below.
Fig. 5 also shows macro base station 502, its in grand region 500 for access terminal (such as the accessing terminal 550) be in this grand region provides service.As shown in the figure, two access point base station 510 and 515 can provide service in local zone 512 and 517.More specifically, access point base station (ap bs) 510 552 can provide service for accessing terminal.Also as shown in the figure, for accessing terminal 554 between macro base station 502 and access point base station 515, exist grand with the backward of access point and forward link disturb, and for accessing terminal 556 between access point base station 510 and 515, there is the forward and backward link interference between access point.Can alleviate or manage these interference according to various power, switching and lag parameter, will be described in more detail below.
In step 304, access point base station can send message or with the automatic supply of other modes to wireless service provider request access point base station.These message and following other possible message can be defined as one group of new class according to SNMP, CORBA and XML model, and may the enterprising line pipe of agreement can manage at the NMP of such as OAM and other.In certain embodiments, access point base station can send message by the IP network such as provided by wideband Communication apparatus.Alternatively, if or this wideband Communication apparatus is current when not providing network to connect, and this access point base station can such as use adjacent macro base station or another possible access point base station to send message by the wireless network of service provider.
Within step 306, access point base station can receive identifying information from service provider.This identifying information can be identified in the access point base station in the network of service provider uniquely, and can be used in the request between service provider and access point base station.
In step 308, access point base station such as can send the first information by activation request message (ARM) to service provider.This first information can be provided by the IP network such as provided by wideband Communication apparatus at first.But similar to description above, when IP network is unavailable, this first information can provide via the macro base station of service provider.This first information can comprise multiple parameters of each side of identifying information and/or description access point base station.Such as, the plurality of parameter can indicating positions information, environmental information, performance information and/or other information relevant with access point base station.At least one that this first information can also comprise the signal received from macro base station by access point base station is measured, and it is using as determining that the key factor of access point base station overlay area is supplied to service provider.
More specifically, this first information can comprise the positional information of access point base station, such as, with the form of longitude or latitude or other form.This positional information such as can use standard network to assist position flow process to determine by service provider and/or access point base station.In some embodiment kinds, access point base station can determine its positional information by carrying out communication with adjacent macro base station (or multiple adjacent base station), such as, by determining that himself positional information is determined in the position of offset information and adjacent base station.Alternatively, in one embodiment, the gps receiver being such as couple to this access point base station or be included in this access point base station can be used to provide positional information.
As mentioned above, this first information can also comprise performance information, RAT technology, maximum number of user and the data rate such as supported, honeycomb coverage property (such as allowing maximum power to distribute) etc.This performance information can comprise the propagation characteristic of the environment residing for access point base station; But this information also or can replace and is provided in environmental information parameter.The mobile radio station transceiver of access point base station can be used to determine one or more parts (such as, environmental characteristics, positional information, offset information etc.) of the first information.
In the step 310, access point base station such as can be received by IP network from service provider and comprise assignment messages and follow the second information comprising one or more operating parameter after assignment messages.In the step 310, access point base station can receive the second information comprising operating parameter and the suitable memory location be stored in by operating parameter in base station, to make these parameters can by softward interview that base station performs and use.Thus, reception and the storage of operating parameter can be supplied or configuring access point base station automatically, and input without any need for direct or manual user except being connected to base station except power supply and broadband connection.
The second information can be determined based on the first information provided by access point base station (such as, metrical information, positional information, signal measurement and/or out of Memory) cause service provider.This operating parameter can comprise handoff parameter, for the treatment of the switching accessed terminal between access point base station and macrocell base stations.In one embodiment, the second information can comprise mark and the out of Memory of access point base station frequency or channel allocation, network SID and/or NID and/or access base station.This second information can comprise PN and offset (for CDMA2000 agreement) and/or honeycomb scrambler (for UTMS).PN skew and/or honeycomb scrambler based on the position of access point base station, and can may be used for management access point base station to the interference of ambient network.
This second information can comprise neighbours (neighbor) list, and it can comprise the list of adjacent macro base station and/or other access point base station.As mentioned above, the second information can comprise PN skew (such as, long and/or short PN skew) and/or honeycomb scrambler (for UTMS).These may be used for the interference management helping access point base station.In certain embodiments, can when neighbor list changes and/or at each place's renewal of periodic time interval neighbor list.Second information can comprise maximum (transmission) power parameter, and it may be used for controlling access point base station to the interference of ambient network (macro base station that such as, can indicate in neighbor list or other access point base station).Based on the expectation overlay area of access point base station and can expect that quality of service (such as, for subscriber household) determines maximum power parameter.Also power parameter can be determined based on the measurement of the signal of the adjacent base station of family transmission model, access point base station (macro base station or other base station) and/or other factors.Other parameter can comprise overhead channel power and distribute (such as, for the PiCH of 1xRTT) etc.
Second information can also comprise switch skew or with switch relevant parameter, it can indicate macro base station to arrive the tap threshold value of access point base station and/or the access point base station tap threshold value to macro base station.Such as, the second information can provide switching offset threshold and lag information to promote switch and do not consider to be in the access point base station within grand overlay area.
This switching offset threshold can comprise handoff parameter, and such as macro base station is to the tap threshold value " MSFDT of access point base station (or femtocell)
dROP" and access point base station to the tap threshold value " F2FDT of macro base station
dROP" and other parameter.Macro base station is to the tap threshold value MSFDT of access point base station
dROPparameter can specify the signal strength signal intensity on the opportunity performing the switching from macro base station to access point base station when being used for determining to move to local zone when accessing terminal from grand region (macro base station just provides service in this region).On the contrary, access point base station is to the tap threshold value F2FDT of macro base station
dROPparameter can specify the signal strength signal intensity on the opportunity performing the switching from access point base station to macro base station when being used for determining to move to grand region when accessing terminal from local zone (access point base station just provides service in this region).
Lag information can comprise one or more parameter, is used to refer to which the up-to-date history providing service to accessing terminal in the middle of macro base station or access point base station.In one embodiment, macro base station is to the tap threshold value MSFDT of access point base station
dROPparameter with dB represent delayed on the occasion of what be provided in during macro base station switches to femtocell, and access point base station is to the tap threshold value F2FDT of macro base station
dROPnegative value be provided in femtocell to macro base station switch during delayed.These delayed can protections between macro base station and femtocell service can not occur to switch frequently (table tennis).
In one embodiment, these parameters can relate to best switching deadline or the threshold value relevant with switching the deadline.Handoff parameter can assist in ensuring that the seamless switching to/from other base station, helps the interference reduced all the other users and/or ambient network, and/or is improved the total quality of systematic function and service by the quantity of the Code Channel that takes in sail.These operating parameter/information and other possible parameter can be semi-static and effective, until service provider sends lower a piece of news and/or until the position of access point base station, environment and/or user's setting and other parameter change.Flow chart below provides the further description to the switching between access point base station and adjacent base station.
Second message can also comprise other parameter, the access point base station time that such as can be sent by network when losing with the link synchronization of adjacent networks is synchronous again, and as being used for the channel allocation of CAM message of the interference mitigation management of assisting access point base station.In certain embodiments, can use overlay area propagation model to determine the second information, be more specifically determination operation parameter.Such as, this determines that the step of multiple information and operating parameter can be performed by one or more servers of service provider or be determined.
This overlay area propagation model can comprise a series of typical case inhabitation/office layout, and it comprises following parameter: dependent (destand alone)/attached/apartment; Region, room number and rank; Building type-concrete, wooden, cardboard etc.These representative configurations can be included in installation procedure (dish).Such as when installing femtocell, user can input, deletes or place various flow process and the parameter as region, building type etc. in a database, then these flow processs and parameter is placed in message (ARM message as described herein) and is sent to service provider.When receiving the message, this information can be mapped in the propagation model kept by service provider, for AP maximum transmission power of such as deriving.Difference between the layout of typical and actual dwelling and the physical location accessed terminal in this dwelling can by the tap threshold value MSFDT of macro base station to access point base station
dROPwith the tap threshold value F2FDT of access point base station to macro base station
dROPthe scope of parameter covers.
In step 312, access point base station can operate based on the second information (such as, one or more operating parameters of the second information).The interference caused by access point base station (such as in the operation of adjacent macro base station or femtocell) can be reduced according to the operation of these parameters, and the effective switching between other base station in access point base station and region can be allowed, will be described further this below.Thus, can automatically configure or supply access point base station, and not need user's manual configuration access point base station, the special knowledge that manual configuration needs its rank higher than general user usually.
In a step 314, in response to the change of network, access point base station such as automatically can receive the operating parameter of renewal from service provider.Other of parameter that the change of network can comprise particular type bag in the increase of access point base station or removal, the increase of offered load or minimizing (such as, causing service provider to change parameters with the load balance in execution area), the change of environmental condition, network or the detection of message, the loss of the power of each base station or reduction and/or can affect access point base station changes.
In certain embodiments, the change of network can be determined by access point base station at first and be reported to service provider before receiving the operating parameter upgraded.But in certain embodiments, service provider first just can provide the parameter of renewal from access point base station receipt message.Such as, as mentioned above, new access point base station can be increased in this region, and in response to the supply of new access point base station, the operating parameter of this access point base station may need to be changed, such as, determined by service provider.Thus, access point base station can operate based on the operating parameter upgraded, and this can reduce the interference caused by access point base station in the network changed.The parameter upgraded also can allow to carry out more effective switching in the network changed.
In addition, during operation, in access point base station overlay area, all Overhead Messages (as PCH etc.) can again be broadcasted, with page transmission reliably during being provided in idle switching.In addition, when new user and/or new resources are added in the existing user such as utilizing channel assignment message to define, this distribution can indicate to access point base station (such as, by OAM interface or wireless transmission), to assist interference mitigation.
Noticing, can automatically perform the multiple of said method element, is more specifically step 304,306,308,310 and/or 312.Terminology used here " automatically " is used for expression action and is not performed by user.Such as, in superincumbent description, user can instruction access point base station simply start to carry out supply chain (installation procedure) to arrange access point base station, and said method element can be performed when inputting any instruction further without user.Alternatively, access point base station is once be mounted or be couple to wide area network (such as, the Internet), and access point base station just can automatically start to arrange.Like this, in this embodiment, during the supply of access point base station, user can not provide any input.But, it should be noted that the embodiment that can exist and need during Lookup protocol or ask user to input, the confirmation of such as step or request specific user parameter.
fig. 6-9-utilizes access point base station to perform the method switched
Fig. 6-9 shows and utilizes access point base station to perform the illustrative examples switched.Method shown in these figure can be combined with any one or miscellaneous equipment of the computer system above shown in figure or equipment.In various embodiments, the certain methods key element shown in figure can be carried out simultaneously, carry out according to the different order outside indicating in figure or omit some key element wherein.Also additional certain methods key element can be performed as required.As shown in the figure, the method can as described belowly be carried out.
Described changing method can in order to avoid frequent switching between macro base station and access point base station environment, and this frequent switching is such as because access point base station can be arranged in causing Anywhere within grand overlay area.For CDMA2000-first generation RTT agreement, the switching between macro base station and access point base station environment can be controlled by the content of the existing procedure of specifying in CDMA hierarchical service (user area identification message, privately owned neighbor list, feature notification message, quick flashing message (flash message)) with information, access point base station access strategy state or pattern, preferred terminal list and handover request message.Similarly, for EV-DO or UMTS system, the switching between macro base station and access point base station environment can be controlled by the content of access point base station access strategy, preferred terminal list and handover request message.
In the step 602-step 606 of Fig. 6, the method such as according to Fig. 3 can come configuring access point base station.In step 602, access point base station performs at least one to the signal received from macro base station and measures, and sends this measurement result (in step 604) to service provider.In step 606, access point base station can receive handoff parameter from service provider, if macro base station is to the tap threshold value " MSFDT of access point base station (or femtocell)
dROP" and access point base station to the tap threshold value " F2FDT of macro base station
dROP", one or more lag parameters etc.In fact, this handoff parameter can by service provider during configuring or At All Other Times (such as, after network or environment change) set up for access point base station.
In step 608, when moving to access point base station from macro base station when accessing terminal, access point base station can perform the measurement to the signal received from accessing terminal.In the 5 embodiment of figure 5, this accesses terminal and service provider can be used by adjacent base station, as the wireless service that macrocell base stations provides.This accesses terminal can within the overlay area of access point base station, or can be at least enough near to make access point base station can start to measure or receive from the signal accessed terminal.In certain embodiments, this accesses terminal can be accessing terminal of defining in the preferred terminal list of access point base station, or can be such as according to the qualified reception of admission policy information of access point base station from the access of access point base station or accessing terminal of service.
In certain embodiments, at least one performed the signal received by accessing terminal is measured to comprise and is accessed terminal detecting access point base station and the signal strength signal intensity received by accessing terminal is reported to access point base station.In certain embodiments, this accesses terminal and can measure the signal strength signal intensity of any base station that it can communicate with it or detect, and indicates the message of base station and/or their signal strength signal intensity detected by signal measurement information broadcast.
More specifically, in CDMA2000-first generation RTT system, when detecting access point base station when accessing terminal, it can send PSMM message.After receiving channel assignment message (CAM), two cellular forward link can be in soft handover (SHO).Access terminal and can remain on soft handover, until reach by the tap threshold value MSFDT of macro base station to access point base station
dROPthe access point base station signal strength signal intensity of specifying.About the MSFDT of the overlay area of macrocellular and access point base station
dROPparameter as shown in Figure 7.In this case, macro base station is to the tap threshold value MSFDT of access point base station
dROPparameter is represented by dashed line, and its occur in macrocellular and access point base station signal strength signal intensity intersect near.Thus, macro base station is to the tap threshold value MSFDT of access point base station
dROPparameter is used to indicate the time that when being switched between macrocellular (or macro base station) and access point base station when accessing terminal, switching should occur.It should be noted that macro base station is to the tap threshold value MSFDT of access point base station
dROPparameter just can be assumed to (dB) value, so that control to switch and interference region.' 0 ' value can forbid switching effectively.
Similarly, for EV-DO or UMTS system, when detecting access point base station when accessing terminal, it such as can send honeycomb to access point base station and measure message.To similar above, access point base station can be waited for until the value of signal strength signal intensity reaches the tap threshold value MSFDT of macro base station to access point base station
dROPto determine that switching completes.
In step 610, access point base station can determine whether signal strength signal intensity reaches by MSFDT
dROPthe signal strength signal intensity of specifying.If switch offset threshold (MSFDT
dROP) reach, then access point base station can send handover request or handover report to service provider's (in step 612), otherwise, turn back to step 610.
In step 614, in response to handover request message, macrocell base stations can be removed from the activation set accessed terminal, and access point base station can access terminal to this and provides service.From the activation set that accesses terminal, remove macrocell base stations can be performed according to request by service provider and/or access point base station as required.The activation set accessed terminal can be determined to access terminal and use which base station to carry out network insertion.In this case, macro base station can stop to this Terminal for service, and this accesses terminal and can continue to use this access point base station, thus completes the switching from macro base station to access point base station.
Notice, although above-mentioned switching flow has come primarily of access point base station, but can imagine and draw, switching flow also can be managed by miscellaneous equipment or server, such as, by service provider self (network controller of such as service provider).Thus, Fig. 5 describes the switching flow base station of transmitting service provision to accessing terminal being switched to access point base station by macro base station.It should be noted that and similar flow process can be used to perform switching between different access point base station and/or other switches.
In the step 802 of Fig. 8, the method such as according to Fig. 6 can come configuring access point base station.As mentioned above, such as macro base station is to the tap threshold value " MSFDT of access point base station (or femtocell)
dROP" and access point base station to the tap threshold value " F2FDT of macro base station
dROP" and so on handoff parameter can by service provider during configuring or At All Other Times (such as, after network or environment change) set up for access point base station.
In step 804, when access point terminal moves from access point base station to macro base station, at least one that access point base station can receive corresponding at least one signal received that accesses terminal is measured.In the embodiment in fig. 9, accessing terminal can be the wireless service accepting the service provider that access point base station provides.This accesses terminal can within the overlay area of adjacent macro base station, or be at least from macro base station enough close to make macro base station can start to provide service for accessing terminal.
In certain embodiments, perform to measure to comprise at least one of the signal received by accessing terminal and access terminal detecting macro base station and/or the signal strength signal intensity received by accessing terminal is reported to access point base station.Such as, in one embodiment, when receiving that come from macro base station, that intensity is on specific threshold (such as, terminal increases or TADD threshold value) signal when accessing terminal, accessing terminal and can report its intensity in PSSM, RUM or honeycomb intensity measuring message.
More specifically, in CDMA2000-first generation RTT system, when detecting macro base station when accessing terminal, it can send PSMM message.After receiving channel assignment message (CAM), this access point base station can be added to this and access terminal in activation set, and now, two cellular forward link can be in soft handover (SHO).Access terminal and can remain on soft handover, until reach by the tap threshold value F2FDT of access point base station to macro base station
dROPthe macro base station signal strength signal intensity of specifying.About the access point base station of the overlay area of macrocellular and access point base station (femtocell) to the tap threshold value F2FDT of macro base station
dROPparameter as shown in Figure 9.In this case, access point base station is to the tap threshold value F2FDT of macro base station
dROPtapping quantities is represented by dashed line, and its occur in macrocellular and access point base station signal strength signal intensity intersect near.Thus, access point base station is to the tap threshold value F2FDT of macro base station
dROPparameter is used to indicate the time that when being switched between access point base station and macro base station when accessing terminal, switching should occur.Notice that access point base station arrives the tap threshold value F2FDT of macro base station
dROPparameter can be assumed to negative (dB) value, so that control to switch and interference region.' 0 ' value can forbid switching effectively.
Similarly, for EV-DO or UMTS system, when detecting macro base station when accessing terminal, it such as can send honeycomb to access point base station and measure message.To similar above, access point base station can be waited for until macro base station signal strength signal intensity reaches the tap threshold value F2FDT of access point base station to macro base station
dROP.
In step 806, access point base station can determine whether signal strength signal intensity reaches by F2FDT
dROPthe signal strength signal intensity of specifying.If switch offset threshold (F2FDT
dROP) reach, then access point base station can send handover request or handover report to service provider's (in step 808), otherwise, turn back to step 806.
In step 810, in response to switching message, access point base station can be removed from the activation set accessed terminal, and macro base station will access terminal to this and provide service.Activate from accessing terminal set remove access point base station can performing according to request by service provider network controlling functions and/or access point base station.The activation set accessed terminal can indicate current which base station that can use that accesses terminal to carry out network insertion.In this case, access terminal and can stop using access point base station and macro base station can be brought into use to carry out radio communication, thus complete the switching from access point base station to macro base station.
Notice, although above-mentioned switching flow manages primarily of access point base station, can imagine and draw, switching flow also can be managed, such as, by network control function by miscellaneous equipment or server.Thus, Fig. 8 describe for transmit to accessing terminal service provision, switching flow from access point base station to macro base station.It should be noted that and similar flow process can be used to perform switching between different access point base station and/or other switches.
the method of Figure 10-utilize access point base station execute permission strategy
In one embodiment, the first information sent to service provider during the supply of access point base station can comprise admission policy and arrange.This admission policy arranges and can comprise preferred terminal list and/or service priority, for determining to access terminal whether can use access point base station, or uses the priority of access point base station for distributing to access terminal.In certain embodiments, user can provide the input of the user interface such as arriving access point base station, is used to specify accessing terminal of preferred terminal list.Alternatively, or in addition, user such as can use their accessing terminal as input equipment to input password, to use this access point base station or to obtain the priority using this access point base station.In certain embodiments, the owner of access point base station or keeper can such as use stratum level, explicit arrangement or other method to define the priority accessed terminal in lists, so that those defining how access point base station to allocate resources in list access terminal.But, it should be noted that preferred terminal list can be can't help access point base station and be provided during the supply of access point base station.Such as, preferred terminal list can be upgraded by any time of access point base station after supply or be provided as required.
Similarly, this admission policy arranges and can comprise admission policy description.Such as, user can provide the input of the admission policy of the expectation of access point base station.In certain embodiments, it is one or more that this admission policy can have in the following option: open (such as, all accessing terminal can access this access point base station), limited (such as, all the accessing terminal accessed terminal in list is allowed unrestrictedly to access, and other limited access point base station that maybe can not access that accesses terminal) and/or privately owned (such as, only allowing accessing terminal this access point base station of use accessed terminal in list).To similar above, this information can or can not provide during supplying, and can as required afterwards any time some place provide or change.But, in certain embodiments, the admission policy of the uncontrollable access point base station of user's possibility; On the contrary, service provider can finally distribute this strategy.Thus, in the first information, various types of information can be provided to service provider.
Correspondingly, the admission policy information of operation that the second information sent by service provider will comprise for controlling access point base station.This admission policy information can comprise admission policy mode parameter, and as mentioned above, this admission policy mode parameter can allow the opening to access point base station resource, limited or privately owned access.In addition, this second information can comprise preferred terminal list, and similarly, as described above, this preferred terminal list can be used for managing the service priority accessed terminal.Such as, under privately owned pattern, access point base station can be only limitted to the access that in list, those access terminal, and for restricted mode, can provide service and can to access terminal to other according to service priority and provide service to accessing terminal of listing.This admission policy pattern and/or preferred terminal list can be determined based on the order of the position of possessory service agreement, access point base station, other user near the position of access point base station, (such as, customer-furnished) the admission policy pattern provided by access point base station and/or preferred terminal list, neighbor list and/or out of Memory.
Figure 10 shows the exemplary process utilizing access point base station execute permission strategy.In step 902, such as, when moving accessing terminal to the position close to access point base station from macro base station, access point base station can from the reception service request that accesses terminal.In step 904, access point base station determines whether current admission policy pattern is in open mode.If admission policy pattern is switching mode, then provide service (in step 906) to accessing terminal.If be not in open mode, then determine whether access point base station is in restricted mode (in step 908).If be in restricted mode, then determine further to access terminal whether on preference lists (in step 910).As mentioned above, by the unconfined service (in step 906) that accesses terminal listed, and the unlisted service of accessing terminal (in step 912) will be given according to service priority.If be not in restricted mode (step 908 no), then determine whether access point base station is in privately owned pattern (in step 914).If be in privately owned pattern, then determine to access terminal whether in preference lists (step 916).By the service of accessing terminal listed, and will be left in the basket from the service request accessed terminal be not listed.
The foregoing is only present pre-ferred embodiments; so itself and be not used to limit scope of the present invention; anyone familiar with this technology; without departing from the spirit and scope of the present invention; can do on this basis and further improve and change, the scope that therefore protection scope of the present invention ought define with claims of the application is as the criterion.
Claims (20)
1. set up a method for the admission policy of access point base station, it is characterized in that, the method comprises:
For one or more accessing terminal provides radio communication in local zone;
Radio communication is provided in the grand region crossing with this local zone part;
Activation request message is sent to service provider;
Receive the assignment messages comprising one or more provision parameter, wherein this one or more provision parameter comprises:
First parameter, it specifies admission policy pattern, and wherein this admission policy pattern specifies the pattern of resource of one or more opening, limited or privately owned this access point base station of access;
This access point base station stores this one or more provision parameter, and wherein this access point base station is for accepting the service request accessed terminal from one of request service continuously; And
Based on this one or more provision parameter, this access point base station accesses terminal to this of request service and provides access.
2. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, this one or more provision parameter also comprises:
Second parameter, specifies the service priority in the plurality of accessing terminal.
3. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, also comprise:
Receive user's input of specifying the list that accesses terminal; And
This access terminal list and this first parameter is used to determine the access of this access point base station.
4. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, also comprise:
Receive user's input of specifying access terminal list and related service precedence information; And
Use this access terminal list and this related service precedence information to determine following at least one in the two: 1) to the access of this access point base station, or 2) access the priority of this access point base station.
5. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, this admission policy pattern specifies privately owned pattern, and wherein the method also comprises:
Receive user's input of specifying the list that accesses terminal, wherein under privately owned pattern, only have accessing terminal in this list can communicate with this access point base station.
6. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, this admission policy pattern specifies restricted mode, and wherein the method also comprises:
Receive user's input of specifying the list that accesses terminal, wherein in a tethered mode, accessing terminal in this list can communicate with this access point base station.
7. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, this admission policy pattern specifies restricted mode, and wherein the method also comprises:
Receive user's input of specifying access terminal list and related service precedence information, wherein in a tethered mode, based on this service priority information, accessing terminal in this list can communicate with this access point base station.
8. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, also comprise:
To access terminal reception information from first, wherein this information comprises password; And
In response to the reception to password, this first is accessed terminal to be stored in and access terminal in list;
Wherein, accessing terminal in this list can communicate with this access point base station.
9. set up the method for the admission policy of access point base station as claimed in claim 1, it is characterized in that, also comprise:
One or more provision parameters of renewal are received from this service provider; And
Based on one or more provision parameters of this renewal, provide the access accessed terminal to this.
10. be couple to a processing unit for interface in femtocell, wherein this interface is for providing and the one or more communication accessed terminal being arranged in local zone and communicating by cable network and service provider, it is characterized in that, comprising:
The module of this service provider is connected to by cable network;
The module of activation request message is sent to this service provider;
Receive the module comprising the assignment messages of one or more provision parameter, wherein this one or more provision parameter comprises the first parameter, it specifies admission policy pattern, and wherein this admission policy pattern specifies the pattern of resource of one or more opening, limited or privately owned this femtocell of access;
Storing the module of this one or more provision parameter, wherein also comprising the module for accepting the service request accessed terminal from one of request service continuously; And
Based on this one or more provision parameter, access terminal to this of request service and module of access is provided.
11. processing unit as claimed in claim 10, it is characterized in that, this one or more provision parameter also comprises:
Second parameter, specifies the service priority in the plurality of accessing terminal.
12. processing unit as claimed in claim 10, it is characterized in that, this processing unit also comprises as lower module:
Receive the module of user's input of specifying the list that accesses terminal; And
This access terminal list and this first parameter is used to determine the module of the access of this femtocell.
13. processing unit as claimed in claim 10, it is characterized in that, this processing unit also comprises as lower module:
Receive the module of user's input of specifying access terminal list and related service precedence information; And
Use this access terminal list and this related service precedence information to determine the module of following at least one in the two: 1) to the access of this femtocell, or 2) access the priority of this femtocell.
14. processing unit as claimed in claim 10, it is characterized in that, this first parameter indicates privately owned pattern, and wherein this processing unit also comprises as lower module:
Receive the module of user's input of specifying the list that accesses terminal, wherein under privately owned pattern, only have accessing terminal in this list can communicate with this femtocell.
15. processing unit as claimed in claim 10, is characterized in that, this first parameter instruction restricted mode, and wherein this processing unit also comprises as lower module:
Receive the module of user's input of specifying the list that accesses terminal, wherein in a tethered mode, accessing terminal in this list can communicate with this femtocell.
16. processing unit as claimed in claim 10, is characterized in that, this first parameter instruction restricted mode, and wherein this processing unit also comprises as lower module:
Receive the module of user's input of specifying access terminal list and related service precedence information, wherein in a tethered mode, based on this service priority information, accessing terminal in this list can communicate with this femtocell.
17. processing unit as claimed in claim 10, it is characterized in that, this processing unit also comprises as lower module:
The module of the reception information that accesses terminal from first, wherein this information comprises password; And
In response to the reception to password, this first to be accessed terminal the module being stored in and accessing terminal in list;
Wherein, accessing terminal in this list can communicate with this femtocell.
18. processing unit as claimed in claim 10, it is characterized in that, this processing unit also comprises as lower module:
The module of one or more provision parameters of renewal is received from this service provider; And
Based on one or more provision parameters of this renewal, provide the module of the access accessed terminal to this.
19. 1 kinds of methods performing the Lookup protocol of access point base station, it is characterized in that, the method comprises:
Be connected to access point base station, with in local zone for one or more accessing terminal provides radio communication, and wherein service provider provides radio communication in the grand region crossing with this local zone part;
Activation request message is received from this access point base station;
Send the assignment messages comprising one or more provision parameter, wherein this one or more provision parameter comprises:
First parameter, it specifies admission policy pattern, and wherein this admission policy pattern specifies the pattern of resource of one or more opening, limited or privately owned this access point base station of access;
This access point base station stores this one or more provision parameter, and wherein this access point base station is for accepting the service request accessed terminal from one of request service continuously; And
Wherein this access point base station is based on this one or more provision parameter, is provided to this access accessed terminal of request service.
20. 1 kinds, for providing the communication system of radio communication for one or more accessing terminal, is characterized in that, comprising:
Service provider;
Macro base station, provides radio communication for accessing terminal for these are one or more in grand region;
Access point base station, in the local zone crossing with this grand area part for this one or more accessing terminal provides radio communication, and wherein this access point base station is configured to:
Be connected to this service provider;
Activation request message is sent to this service provider;
Receive the assignment messages comprising one or more provision parameter, wherein this one or more provision parameter comprises:
First parameter, it specifies admission policy pattern, and wherein this admission policy pattern specifies the pattern of resource of one or more opening, limited or privately owned this access point base station of access;
This access point base station stores this one or more provision parameter, and wherein this access point base station is for accepting the service request accessed terminal from one of request service continuously; And
Based on this one or more provision parameter, be provided to this access accessed terminal of request service.
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| US97765407P | 2007-10-05 | 2007-10-05 | |
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| US12/119,581 | 2008-05-13 | ||
| US12/119,581 US8248923B2 (en) | 2007-10-05 | 2008-05-13 | Automatic provisioning of admission policy for femtocell |
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| CN102014039B (en) * | 2009-09-07 | 2015-05-06 | 华为技术有限公司 | Data transmission method and access point |
| CN102740381B (en) * | 2011-04-12 | 2016-03-09 | 华为技术有限公司 | Information processing method and device |
| US9584966B1 (en) * | 2015-09-30 | 2017-02-28 | Viavi Solutions Uk Limited | Determining an indoor/outdoor classification for a call |
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| US6049596A (en) * | 1997-09-25 | 2000-04-11 | Alcatel | Individualized system for exchanging data between a terminal and access means via a telephone network, and terminal, and access means |
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| US6049596A (en) * | 1997-09-25 | 2000-04-11 | Alcatel | Individualized system for exchanging data between a terminal and access means via a telephone network, and terminal, and access means |
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