CN100512517C - Cell broadcast in a hybrid GSM/CDMA network - Google Patents

Abstract

A method of broadcasting messages over a CDMA air interface in a GSM wireless communication system, comprising: a message is sent to a base station substantially in accordance with the GSM cell broadcast service protocol and to a mobile station over the CDMA air interface. The messages are transmitted substantially in accordance with the CDMA transmission standard, preferably the IS-95B standard.

Description

Cellular zone broadcasting in hybrid GSM/CDMA net

I. invention field

The present invention relates to aerogram on the whole, specifically, relates to advanced cell telephone network.

II. background of invention

Global system for mobile communications (GSM) telecommunications is used for the cell telephone network of the many countries in the whole world.Existing GSM net is based on time division multiple access (TDMA) digital communication technology.GSM provides a useful network service and a standard.

One of said GSM network service is a Short Message Service---cellular zone broadcasting (SMSCB), the base station sub-system (BSS) that is used for by network is distributed to subscriber unit or travelling carriage (MS) with the short message of cellular zone broadcasting center (CBC).SMSCB message can be from such as traffic returns and the so various channels of weather forecast.These message by special cell district broadcast channel (CBCH) be broadcast to so-called cell broadcast district define the area in MS, need be from the affirmation of MS.MS only receives message at idle mode when central (be call do not carry out).Have illustrated to SMSCB and relevant interface, protocol stack and message format etc. in the GSM standard 02.02,03.41,03.49 and 04.12 of reference by reference at this in addition.But note there is not the defined mandatory agreement of GSM standard between CBC and the BSS.But, this interface protocol stays by network and cellular zone broadcast service operator and determines according to the defined original contents of 03.41 standard.

Code division multiple access (CDMA) is the directly improvement digital communication technology of order spread-spectrum modulation technique of a usefulness, compares to provide with TDMA wireless bandwidth utilized more efficiently, and link more reliable between cell telephone subscriber and the base station, that do not have decline.Leading CDMA standard is the TLA/EIA-95 that telecommunications industry association (TIA) is issued, in this in addition reference by reference.In literary composition and claims, this standard is meant the known IS-95 of cell communication industry before and after the present patent application.The latest edition of this standard is called TLA/EIA-95-B (after this being called IS-95B), and the advanced networks feature that is had comprises the process by the paging channel broadcast of the reception that MS monitors of compatibility.

Based on the U.S. Patent application U.S.Ser.No.08/575 of the denomination of invention that proposes December 20 nineteen ninety-five for " utilizing the radio telecommunications system of CDMA radiofrequency signal modulation in conjunction with the A interface telecommunications network agreement of GSM ", PCT patent application PCT/US96/20764 of 413 (both all transfer the present patent application assignee and by quote at this in addition with reference to), illustrated that one utilizes CDMA air interface (being basic RF communication protocol) to implement the radio telecommunications system of service of GSM network and agreement.By utilizing this system, some TDMA base station (BSS) of existing at least GSM net and subscriber unit can be replaced by corresponding CDMA equipment or additional.Make the BSS of the CDMA of this system be fit to communicate by letter with GSM mobile switching centre (MSC) by the A interface of a standard GSM.So just, make GSM network service core partly obtain keeping, the transition of TDMA to CDMA is transparent to the user.

Among PCT patent announcement WO95/24771 by quoting reference in addition at this and the WO96/21999 and people such as Tscha be entitled as in the article (the second itternational meeting proceedings of universal personal Telecommunication, the 181-185 page in Ottawa (1993)) of " the subscriber signaling gateway between CDMA travelling carriage and the GSM mobile switching centre " and all the hybrid cellular district communication network that comprises GSM and CDMA part be illustrated.Above-mentioned publication does not relate in this hybrid network the support such as this short message of SMSCB or cellular zone broadcast service.

Summary of the invention

The object of the invention is, is provided for the method and apparatus of a GSM/CDMA hybrid cellular district communication network.

Its further purpose of some aspect of the present invention is, the method and apparatus of realizing GSM cellular zone broadcast service by a CDMA air interface is provided.

In the preferred embodiment of the present invention, a GSM/CDMA hybrid cellular district communication system comprises TDMA and cdma base station (BSS), all according to GSM standard and a cellular zone broadcasting center (CBC) contact.Transfer the present patent application assignee and by quote at this in addition with reference to, on July 20th, 1998 file an application, denomination of invention is the U.S. Patent application U.S.Ser.No.09/119 of " switch the base station in the GSM/CDMA hybrid network ", 717 general description the type system.Subscriber unit in the network is called travelling carriage (MS) here, preferably can be by suitably switching between TDMA and CDMA air interface and two types of base station communications.The GSM procotol is used for two types of air interfaces, no matter so that MS is in the BSS communications status of TDMA or is in the short message broadcasting that can both receive GSMCBC with the BSS communications status MS of CDMA.Like this, the present invention just can make the BSS of CDMA and MS all be integrated in the GSM network infrastructure, and do not jeopardize with this network be associated, to any MS broadcasting basically based on the CBC ability of the message of GSM standard, and existing infrastructure do not needed to do other modifications basically.

In the certain embodiments of the invention, the GSM Short Message Service---cellular zone broadcasting (SMSCB) message utilizes the CDMA air interface of CDMA paging channel to be broadcast to MS by one.Better be that message is broadcasted by the defined paging channel of IS-95B standard according to broadcasting process.

So, according to preferred embodiment of the present invention, provide the method for passing through a CDMA air interface broadcast in a kind of GSM mobile radio communications system, comprising:

Basically transmit a message to the base station according to GSM cellular zone broadcast service agreement;

By the CDMA air interface this message is sent to a travelling carriage.

Better be, transmission packet draw together basically according to CDMA send standard preferably IS-95B send a message.

Better be, transmission packet is drawn together by a paging channel and is sent a message, and wherein transmission packet is drawn together message is delivered to one or more discrete cells district.

In one preferred embodiment, transmission packet is drawn together and is sent a message and have the high likelihood that is received by this travelling carriage with convenient operating mobile station when the mode of gap, then sends a message after preferably sending a Radio Paging.Better be to send Radio Paging and be included in transmission one paging in the predetermined gap of monitoring by travelling carriage in the one-period property broadcast paging cycle.This method also can comprise transmission one time progress message, comprising the information of one or more Radio Paging that will send in the time about the progress of being formed at one or more periodic broadcast paging cycle.

Better be that transmission packet is drawn together basically and repeatedly sent single message according to GSM cellular zone broadcasting command.Wherein send single message and comprise, thereby have when being the identical broadcast address of previous message when second message that travelling carriage received, just abandon second message with first message to this distribution of messages one broadcast address.Better be repeatedly to send single message and comprise by response cellular zone broadcasting command determined repetition rate and repeat to send this message.

Even more ideal is that transmission packet is drawn together a GSM cellular zone broadcast is packed in the IS-95 message.

Better be to transmit message and comprise from a cellular zone broadcasting center and receive a message.

In one preferred embodiment, transmission packet is drawn together and is sent a message header, and comprising the message identifier field of an expression the characteristic information, travelling carriage responds this feature and determines to this source codec still to be that this message is abandoned.

According to preferred embodiment of the present invention, a kind of device that passes through CDMA air interface broadcasting from the short message of a cellular zone broadcasting center also is provided, comprise: a base station sub-system, basically this message is sent to a travelling carriage according to the message of GSM cellular zone broadcast service agreement reception, and by the CDMA air interface from this cellular zone broadcasting center.

Better be that base station sub-system sends standard, preferably sends this message according to IS-95B according to CDMA basically.

Better be, base station sub-system sends this message by a paging channel, and this message is delivered to one or more discrete cells district.

Better be, base station sub-system sends a message, has the high likelihood that is received by this travelling carriage with convenient operating mobile station when the mode of gap, wherein, before sending message, send a paging in the predetermined gap that base station sub-system is monitored by travelling carriage in one-period property broadcast paging cycle.

Better is, base station sub-system repeatedly sends single message according to GSM cellular zone broadcasting command basically, and wherein, base station sub-system repeats to send this message by the determined repetition rate of response cellular zone broadcasting command.Better is, base station sub-system is to this distribution of messages one broadcast address, thereby has when being the identical broadcast address of previous message with first message when second message that travelling carriage received, just abandons second message.

Brief Description Of Drawings

The present invention is from understanding below in conjunction with having in the middle of the detailed description of accompanying drawing to its preferred embodiment more comprehensively, wherein:

Fig. 1 is the schematic block diagram of preferred embodiment GSM/CDMA hybrid cellular of the present invention district communication system;

Fig. 2 is the schematic block diagram of communication protocol between each part in explanation preferred embodiment Fig. 1 of the present invention system;

Fig. 3 is the schematic block diagram that explanation preferred embodiment of the present invention is used for the message format of cellular zone broadcast service message.

The detailed description of preferred embodiment

Referring now to Fig. 1, be the schematic block diagram of preferred embodiment GSIVI/CDMA hybrid cellular of the present invention district communication system 20.System 20 sets up based on the public land mobile network (PLMN) 22 of gsm communication standard around one, and this communication standard is well known in the art and brief description mistake in front.Its infrastructure of this network is ready-made, is used widely in many countries, and its advantage of the present invention is, can progressively introduce the CDMA service under situation about not needing the bigger change of existing commutating device do in conjunction with this network.

PLMN22 comprises that at least one moves and serves switching center (MSC) 24, perhaps may be some this centers (but a MSC only is shown for clarity), and it controls network running in an area.Other functions of MSC24 also are responsible for the location registers and the switching of subscriber unit between the base station of subscriber unit, and the linking of PLMN22 and public switched telephone network (PSTN) and/or Packet Data Network (PDN) 48.PLMN also comprises a network management center (NMC) 26 and cellular zone broadcasting center (CBC) 28.Further specified in the others ofsystem 20 and the U.S. that mentions in the above about the detailed content of travelling carriage in the system (MS) 40 and the PCT patent application.

System 20 comprises a plurality of MS40, and they are communicated by letter with PLMN22 by one or more wireless RF link of accepting the cell communication frequency with 32 through a plurality of base station sub-systems (BSS) 30.The MS40 that is also referred to as subscriber unit can communicate by letter with GSM BSS30 with the TDMA wireless communication protocol of standard GSM, again can be with communicating by letter with CDMA BSS32 based on the cdma communication method of the following describes.But for the sake of clarity, only illustrate in the middle of MS40, GSM BSS30 and the CDMABSS32 each one among Fig. 1, will be understood that,system 20 in fact each of these system's parts generally includes a plurality of.

Communication between CDMA BSS32 and the MS40 better is based on the IS-95 standard of cdma communication with cdma wireless " air interface ", preferably is based on this TIA/EIA-95-B version standard of reference in addition by reference, and adds that necessity described herein revises.BSS32 sets up around a base station controller (BSC) 34, and this controller is controlled several base stations transceiver (BTS) 36 and communication with it.When MS is in one during by the area of this particular B TS service or cellular zone, each BTS sends RF signal and receives the RF signal to MS40 with from MS40.And when MS40 is in cellular zone by GSMBSS 30 service, better be MS by the GSM/TDMA air interface for GSM/TDMA BTS communicate by letter with BSS30 (not shown in order to simplify).

GSM BSS 30 and CDMA BSS 32 be basically according to GSM standard, i.e. GSM standard A interface through further specifying in the above mentioned U.S. and the PCT patent application, communicate by letter with MSC 24 and controlled by MSC 24.BSS 32 also comprises a wireless operation maintenance center (OMCR) 38, communicates by letter with NMC26 by a GSM standard Q3 interface.

BSC 34 communicates by letter with CBC 28 according to said GSM SMSCB standard will be by the short message of air broadcast to receive.A CBC 28 is connected with the BSC of a plurality of BSS usually, and these BSS can comprise such as this CDMA BSS of BSS32 with such as this GSM/TDMA BSS of BSS30.As defined in the GSM standard, CBC can be from receiving the short message that is used to broadcast such as the such plurality of units district broadcast entity (not shown) in weather forecast center and traffic returns center.

CBC 28 is in charge of the cellular zone broadcast SMS and gives an order to BSC 34 (and other BSC), comprising:

* as GSM standard 03.41 defined, distributing serial numbers is in order to identification message.Its stem of each message (will further specify below with reference to Fig. 3) comprises this sequence number.The geographic range of this message of fields specify that it generally includes, a message code and a update number in order to distinguish identical source and same type message.

* revise or the deletion message that BSC held

* according to GSM standard 03.41, go on the air to BSC by transmitting element district broadcast, be 82 eight-level codes if message need be filled into length.

* one group of cellular zone determining that message should be sent to or BTSs, and the geographic range of expression message.The tabulation of determined cellular zone or BTSs is sent to BSC, and BSC correspondingly distributes broadcasting then.

* the time that definite message of being broadcasted should begin.

* the time that the message of determining to be broadcasted should stop, and BSC carried out corresponding instruction.

* determine the repetition rate that information broadcast should repeat;

* determine the cellular zone broadcast channel of broadcast thereon;

BSC34 plays following effect with respect to CBC28:

* the cellular zone broadcasting command is received and compiles.

* memory cell areas broadcast.

* as will be described as further below, the message on the CDMA paging channel is dispatched.

* working as needed message repetition rate can't obtain, and for example when the repetition rate that needs is too high, just provides an indication to CBC.

* confirm to finish the execution of CBC order.

* report to CBC when understanding when order maybe can not be carried out an order.

* with cellular zone broadcast Route Selection to corresponding BTSs, better be that as will be described as further below such utilizes direct paging.

* cellular zone broadcast service (CBS) information is sent to each BTS.

* but like that also rise time progress message as will be described as further below shows a transmitting time progress of wishing.

Better be that when the message thatBSC 34 is sent to CBC28 belonged to a plurality of cellular zone, this message only transmitted once with the tabulation of its cellular zone of delivering to.

MS 40 comprises mobile device (ME) 42, and it better is or comprises two wireless transceivers, and one is configured to be used for the TDMA running, and one is configured to be used for the CDMA running, or comprises a single transceiver, dynamically switches between TDMA and CDMA.The portable terminal that MS comprises (MT) support terminal equipment (TE) 46 is used for sound and data input and output.In addition, MS40 comprises a subscriber identification module according to GSM standard (SIM) 44, use to CDMA air interface substantial transparent and independently mode differentiate MS40 user's identity.Although having double mode CDMA/TDMA air interface compatibility with MS40, preferred embodiment here is illustrated, but should understand, the travelling carriage that the principle of the invention can be equally applicable to be adopted only has the system of CDMA compatibility, or is applicable to the system that adopts GSM networking standard as required.

MS 40 receives the cellular zone broadcast that BTS 36 is sent from BSC 34.The road is such as known in the art, and TE46 typically is used for by the alphanumeric style display message.In addition, 40 pairs of 25 cellular zone broadcasts of MS have following ability:

* the message identifier that is had is shown that the message that MS user has no stomach for to this message subject discerns and abandon.

* ignore the repeated broadcast (being that the information broadcast address does not change) of having received message.

* when supporting so a kind of interface, transmit message through the R interface between aME 42 and theTE 46.

Referring now to Fig. 2, betweenCBC 28 andMS 40, transmit the schematic block diagram of protocol stack used in the SMSCB telecommunication service information byBSS 32 for expression preferred embodiment of the present invention.Agreement shown in the figure makes and BSS that the GSM CBC do not add modification basically can enough IS-95B prescribed by standard and the paging channel broadcasting process between the MS according to GSM SMSCB standard short message to be sent to MS40.

The cellular zone broadcast is sent to BSC34 according to the CBC-BSC interface of GSM standard fromCBC 28 generally by one.As mentioned above, the agreement that will implement in this interface is based on the content that GSM standard 03.41 defined original contents is reached an agreement between CBC and PLMN22 operator.Better be as shown in Figure 2, this storehouse follow sample protocol stack that GSM standard 03.49 provides one of them.

03.41 the defined GSM original contents of standard receives compiling by the BSC34 that meets this standard generally, but in order to adapt to the IS-95B broadcasting process on the paging channel some exceptions must be arranged.GSM standard is supported two kinds of cellular zone broadcast channels (CBCH): primary channel and extended channel; But these two kinds of channels are all corresponding to identical CDMA paging channel.In addition, in the GSM standard maximum 20 repetition rates of cellular zone broadcast are defined as in per 51 * 8TDMA frame (1.883s) once, according to IS-95B, the maximum repetition rate of CDMA air interface be in each periodic broadcast paging cycle once, be equivalent to minimum about 2.8seconds.BSS 32 determines the BCAST_INDEX parameter between 1 and 7, as the IS-95B defined, is set the periodically duration of paging cycle.If conflict is arranged, for example have more than a message and transmit a preset time, BSS32 determines the information broadcast order according to predetermined standard.

BSS 32 transmits according to the message of interface original contents management end opposite end used in the CBC-BSC interface, and synchronous and time schedule service are provided.IS-95B comprises several different paging methods, can use in corresponding preferred embodiment of the present invention, further specifies below.Better be, BSC34 can send Radio Paging (as described below) and message to the discrete cell district, and the cellular zone broadcast can be distributed to particular locality like this.

MS40 wherein as described here, revises MS and BSS protocol stack to adapt to the service of GSM network, as SMSCB by a CDMA Um Interface and CDMA BSS32 switching signal.SMSCB message is sent to MS40 by the paging channel of CDMA air interface from BTS36.

Fig. 3 is a block diagram, shows according to preferred embodiment of the present invention, and SMSCB message 80 is sent to MS40 by paging channel.Message 80 has standard I S-95 data short pulse message (DBM) form.Message 80 is packed whole GSM cellular zone broadcasts, comprisesSMSCB stem 86 and thedata 88 of GSM, better is according to GSM standard 03.41.Message 80 also comprises c, is provided with to stipulate the total length of message by BSS.32, comprises acrc field 92, and the both also has theopposite field 90 of aDBM stem 84 and 5 bits according to IS-95 standard.

DBM stem 84 is provided with by BSS32, basically be according to the regulation of IS-95B to paging channel message, except the broadcast address fields of DBM stem is an exception, the setting that better is this field contents is the regulation that meets GSM cellular zone broadcast service, particularly GSM standard 03.41 the 9.3rd saves, and " message format on BTS-MS interface " is defined.Broadcast address fields comprises the part of the cellular zone broadcast stem that CBC28 produces, and it is uniquely can identification message to make MS40 to detect and avoid deciphering message or the uninterested message of having received of user.(the CBC message header comprises first six eight hytes of 88 eight hytes of whole message.) MS40 can ignore BURST-TYPE (short pulse sequence type) and broadcast address fields in the DBM stem 84 of message in given periodic broadcast gap cycle with the same message of before having received of message.

Its structure of broadcast address fields is illustrated by following table 1:

Table 1

Divide field	Length (bit)	Value
			Type of message	8	0-usually message 1-time schedule message (below further describe) other-keep
Sequence number	16	To any one given message identifier, transmit a new message at every turn, sequence number all upgrades, and the different message and the message of source commonly used and type are distinguished.
			Message identification	16	The source of identification message and type
The digital coding progress	8	Indication comprises GSM standard 03.38 defined letter/coding and language in MS place plan processing messages.

Sequence number divides the structure of field also according to 9.3 joint definition of above-mentioned GSM standard 03.41, is illustrated by following table 2:

Table 2

Divide field	Length (bit)	Value
			Geographic range	2	Indicate an area, its message code and display mode are unique
Message code	10	Change, distinguish the message (identical message identification is promptly arranged) of identical source and same type like this
			Upgrade number	4	To given message identifier, region and a message code, the change of Indication message content.

Message code PLMN is distributed by the operator, can be used for discerning different message subjects.

Because a given message is not must be by the whole cellular zone broadcasting in the given area, available geographic range (Geographical Scope) determines that two that different cellular zones receives have the message of same sequence number (SerialNumber) and message identifier (Message Identifier) whether really identical, mentions as 9.3 joints of said GSM 03.41 standard.

Typically, MS40 works in the gap mode, as the IS-95B defined; Always do not monitor a paging channel.So, when transmitting a cellular zone broadcast, better be to use singular process to guarantee that the MSs that works in the gap mode can receive message.

Like this, in the preferred embodiment of the present invention, BSS32 is as transmission one broadcast paging messages of IS-95B regulation, one " general paging message " for example, perhaps send one " paging request message " according to GSM standard, perhaps other suitable type of message announces to be about to send broadcast.Better be that the paging acknowledgment that comprises in the beep-page message (identity of the MS that common regulation message sends to) comprises a broadcast address, when transmission one cellular zone broadcast message transmission, receives beep-page message to the MSs indication.Send once actual cellular zone broadcast then.Broadcast address in one of them MSs decoding paging record, it can determine that whether broadcast is duplicating of the message received or the user loses interest in, if it will avoid broadcast itself is decoded.

In another preferred embodiment, BSS32 reduces sending the required general expenses of broadcast like this according to the broadcast paging cycle of IS-95B regulation periodic.In this mode of operation, MS40 monitors paging channel during predetermined gap, sends Radio Paging or message at this channel, and paging and message only need transmission primaries in each periodic broadcast paging cycle like this.Preferred methods is that according to IS-95B, transmission Radio Paging in first gap of period demand by the MS monitoring, sends broadcast itself later on again.

Preferred methods is, is to be used for allocation units district broadcast to the MSs's of gap mode work as the broadcast scheduling of describing in the GSM03.41 standard.In this case, broadcast paging messages comprises one " progress message ", and its " message type field " (explaining in the table 1) inserts " 1 "." progress message " comprise many in " progress time " information with the sequential cells district broadcast that transmits, comprise one or several periodic broadcast cycle afterwards immediately." progress message " comprises " message semantic definition " to each message, also has the cycle number of indication time location in " progress time "." message semantic definition " comprises the information from broadcast address, and MSs can determine that each arranges the types and sources of the message of progress properly like this, and whether it has received message.

Each " progress message " comprises the field of definition one " beginning cycle number " and " end period number ", the length of indication " time schedule time ".Preferred methods is, sends new " progress message " after the stop press of " progress time ", that is, and and in aforesaid " end period number "+1 this one-period.With reference to the identical progress time, can broadcast several progress messages, " beginning cycle number " indication is followed by first cycle of last " time schedule message ".

When needing, BSS may receive the indication that strides across the progress of delivering in " time schedule message ", for example, sends the SMSCB message of a new high priority.Afterwards, with the former progress of recovery unit district broadcast.

When MS40 communicates by letter with the BSS32 of CDMA, be suitable for method described above and agreement.When the BSS30 of MS40 by GSM communicated by letter with CBC28, the communication protocol between these parts met GSM standard, need not revise basically.

Although the description of preferred embodiment is with reference to specific TDMA and cdma communication standard, skilled person in the art will appreciate that said method and principle also can combine use with other method of digital coding and signal modulation.Scope of the present invention not only comprises whole system described above and communication process, also comprises various innovation parts and the combination and the branch combination of these systems and process.Specifically, although preferred embodiment described above is with reference to TDMA/CDMA system 20 and MS40, is appreciated that and also can uses these method and apparatus the cellular zone broadcast to be sent to MS in the cdma system that does not have the TDMA performance equally.

Be appreciated that preferred embodiment only provides with way of example, four corner of the present invention is only limited by claims.

Claims (14)

Translated fromChinese

1.一种在混合GSM/CDMA蜂窝区通信系统中通过一CDMA空中接口广播消息的方法，其特征在于，包括：1. A method for broadcasting messages through a CDMA air interface in a hybrid GSM/CDMA cellular area communication system, characterized in that, comprising:按照GSM单元区广播服务协议将一消息从单元区广播中心传送至CDMA基站；transmitting a message from the cell broadcast center to the CDMA base station according to the GSM cell broadcast service protocol;将所述消息封装为根据IS-95B标准的格式；以及encapsulating the message into a format according to the IS-95B standard; and通过CDMA空中接口在CDMA寻呼信道上将所封装的消息从所述CDMA基站发送至一具有CDMA兼容性的移动台，sending the encapsulated message from said CDMA base station to a CDMA-compatible mobile station on a CDMA paging channel over a CDMA air interface,其中所封装的消息具有一消息首部，所述消息首部包括一表示消息特征的消息识别符字段，并且所述移动台响应该特征来确定是对该消息译码还是将该消息丢弃。Wherein the encapsulated message has a message header, the message header includes a message identifier field indicating a message characteristic, and the mobile station determines whether to decode the message or discard the message in response to the characteristic.2.如权利要求1所述的方法，其特征在于，发送消息包括将所述消息送至一个或多个特定单元区。2. The method of claim 1, wherein sending a message comprises directing the message to one or more specific cell areas.3.如权利要求1所述的方法，其特征在于，发送消息包括：在发送一广播寻呼后接着发送所述消息。3. The method of claim 1, wherein sending the message comprises sending the message subsequent to sending a broadcast page.4.如权利要求3所述的方法，其特征在于，发送广播寻呼包括：在一周期性广播寻呼周期中由移动台所监测的预定间隙内发送一寻呼。4. The method of claim 3, wherein sending the broadcast page comprises sending a page during a predetermined interval monitored by the mobile station in a periodic broadcast paging cycle.5.如权利要求4所述的方法，其特征在于，包括发送一时间进度消息，其中包括关于在一个或多个周期性广播寻呼周期所组成的进度时间内要发送的一个或多个广播寻呼的信息。5. The method of claim 4, comprising sending a schedule message including information about one or more broadcasts to be sent within a schedule consisting of one or more periodic broadcast paging cycles paging information.6.如权利要求1所述的方法，其特征在于，发送消息包括按照GSM单元区广播命令多次发送所述消息。6. The method of claim 1, wherein sending the message comprises sending the message multiple times according to a GSM cell broadcast command.7.如权利要求6所述的方法，其特征在于，多次发送所述消息包括对该消息分配一广播地址，从而当移动台所接收的第二消息具有与第一消息即先前消息相同的广播地址时，便丢弃第二消息。7. The method of claim 6, wherein sending the message multiple times comprises assigning a broadcast address to the message so that when the second message received by the mobile station has the same broadcast address as the first message, that is, the previous message address, the second message is discarded.8.如权利要求6所述的方法，其特征在于，多次发送所述消息包括按响应单元区广播命令所确定的重复频率重复发送该消息。8. The method of claim 6, wherein sending the message multiple times comprises repeatedly sending the message at a repetition frequency determined in response to a cell zone broadcast command.9.一种在混合GSM/CDMA蜂窝区通信系统中通过一CDMA空中接口广播来自一单元区广播中心的短消息的装置，其特征在于，包括：一CDMA基站子系统，所述基站子系统包括用于按照GSM单元区广播服务协议接收来自该单元区广播中心的消息并用于将所述消息封装为根据IS-95B标准的格式的CDMA基站控制器，以及用于通过CDMA空中在CDMA寻呼信道上将所封装的消息发送至一具有CDMA兼容性的移动台的CDMA基站收发器，9. A device for broadcasting short messages from a cell broadcast center by a CDMA air interface in a hybrid GSM/CDMA cellular communication system, characterized in that it includes: a CDMA base station subsystem, and the base station subsystem includes A CDMA base station controller for receiving messages from the cell broadcast center in accordance with the GSM cell broadcast service protocol and for encapsulating said messages into a format according to the IS-95B standard, and for over-the-air CDMA paging channel sending the encapsulated message to a CDMA base transceiver station of a CDMA-compatible mobile station,其中所封装的消息具有一消息首部，所述消息首部包括一表示消息特征的消息识别符字段，并且所述移动台响应该特征来确定是对该消息译码还是将该消息丢弃。Wherein the encapsulated message has a message header, the message header includes a message identifier field indicating a message characteristic, and the mobile station determines whether to decode the message or discard the message in response to the characteristic.10.如权利要求9所述的装置，其特征在于，所述CDMA基站收发器将该消息送至一个或多个特定单元区。10. The apparatus of claim 9, wherein said CDMA base transceiver station sends the message to one or more specific cell areas.11.如权利要求9所述的装置，其特征在于，所述CDMA基站收发器在发送所述消息前，在一周期性广播寻呼周期中由移动台所监测的预定间隙内发送一寻呼。11. The apparatus of claim 9, wherein said CDMA base station transceiver transmits a page within a predetermined gap monitored by a mobile station in a periodic broadcast paging cycle prior to transmitting said message.12.如权利要求9所述的装置，其特征在于，所述CDMA基站收发器按照GSM单元区广播命令多次发送所述消息。12. The apparatus according to claim 9, wherein the CDMA base transceiver station sends the message multiple times according to a GSM cell broadcast command.13.如权利要求12所述的装置，其特征在于，所述CDMA基站收发器按响应单元区广播命令所确定的重复频率重复发送该消息。13. The apparatus of claim 12, wherein the CDMA base station transceiver repeatedly sends the message at a repetition frequency determined in response to a cell broadcast command.14.如权利要求12所述的装置，其特征在于，所述CDMA基站收发器对该消息分配一广播地址，从而当移动台所接收的第二消息具有与第一消息即先前消息相同的广播地址时，便丢弃第二消息。14. The apparatus according to claim 12, wherein the CDMA base transceiver station assigns a broadcast address to the message, so that when the second message received by the mobile station has the same broadcast address as the first message, that is, the previous message , the second message is discarded.

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