CN1757180A - Method and system for recognizing call switch-over from 1XEV-DO system to 1X system - Google Patents
Method and system for recognizing call switch-over from 1XEV-DO system to 1X system Download PDFInfo
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- CN1757180A CN1757180A CNA2003801100331A CN200380110033A CN1757180A CN 1757180 A CN1757180 A CN 1757180A CN A2003801100331 A CNA2003801100331 A CN A2003801100331A CN 200380110033 A CN200380110033 A CN 200380110033A CN 1757180 A CN1757180 A CN 1757180A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
According to the system of the invention, if the multimedia service is simultaneously provided for the composite accessing terminal, within the time calculated from the calling cancelling point, a low electrical level signal lower than the preset level is received from the composite accessing terminal; thus through sending the inquiry massage for inquiring whether the composite accessing terminal receives a speech signal or a low speed data or not, and through receiving the confirming massage about the composite accessing terminal which receives the speech signal or the low speed data received from a mobile switching center, the calling of the composite accessing terminal being connected and switched to the 1X system can be identified in real time.
Description
Technical field
The present invention relates to a kind of method and system that the calling of hybrid access terminal from the 1xEV-DO system to the 1X system switched of discerning, more particularly, a kind ofly cancelling if relate to from 1xEV-DO system bid when hybrid access terminal sends multi-medium data, thereby make hybrid access terminal to be connected to the 1X system, the method and system that the automatic calling of identification hybrid access terminal from the 1xEV-DO pattern to the 1X pattern switched according to the voice signal that sends from the 1X system.
Background technology
Mobile communication system has developed into second generation honeycomb/personal communication service (PCS) system from the analog Advanced Mobile Phone System of the first generation (AMPS).Recently, developed international mobile telecommunication-2000 (IMT-2000) system, and be widely used as third generation high-speed data communication system.
IMT 2000 services can be categorized into code division multiple access (after this being called CDMA) 2000 1X service and CDMA 2000 1xEV-DO service.
CDMA 2000 1X service makes it possible to rely on the IS-95C net that upgrades from the IS-95A/B net, provides wireless Internet with the speed of maximum 144kbps, 14.4kbps that this speed is supported much larger than existing IS-95A/B or the speed of 56kbps.Therefore, serve the service quality that can improve existing speech and wireless application protocol (wap) by CDMA 2000 1X.In addition, can provide various multimedia services (for example, AOD, VOD).
The standard that provides the CDMAIMT-2000 system as the 3GPP2 (third generation partner program 2) of cooperation international standard group is as the IMT-2000 standard, so that the multimedia mobile communication service is provided.According to above-mentioned standard, decision will based on the HDR (high data rate) of Qualcom company (Qualcom Incorporated) suggestion, be called that " (evolution data optimized: the evolution data of optimization) " high-speed grouped data system is as the international standard high-speed grouped data system for CDMA 2000 1xEV.CDMA 2000 1xEV-DO (hereinafter referred to as " 1xEV-DO ") system is from CDMA 2000 1X system upgrades, and is designed for and only sends data.
The 1X system use circuit network and Packet Based Network the two, and maximum transfer rate is provided is the unidirectional low-rate data service of 307.2kbp, and voice data.On the contrary, the 1xEV-DO system-specific is in Packet Based Network with maximum transfer rate is provided is the bidirectional high speed data, services of 2.4Mbp.
In the following description, for convenience of explanation, abbreviate CDMA 2000 1X systems as " 1X system ", and abbreviate CDMA 2000 1xEV-DO systems as " 1xEV-DO system ".
Current, the 1xEV-DO system together uses with the 1X system of habitually practising.That is, 1xEV-DO system and habitual 1X system all be installed in the wireless base station or base station controller in, although they are separate operations.That is to say that the transceiver of wireless base station comprises the channel card and the channel card that is used for the 1X system that are used for the 1xEV-DO system.In addition, base station controller comprises data processing plate and another data processing plate that is used to handle by the data of 1X system transmission/reception that is used to handle by the grouped data of 1xEV-DO system transmission/reception.
When from the mobile communication system such as wireless base station or base station controller when mobile communication terminal sends high data rate (that is, multi-medium data), send data by the 1xEV-DO system, in addition, send voice signal or low-rate data by the 1X system.
Hybrid access terminal is one and can receives from the mobile communication terminal of the communication service of 1xEV-DO system and the two transmission of 1X system.In addition, hybrid access terminal can periodically and alternately be monitored each in 1xEV-DO and the 1X system with the preset time cycle.That is, in not using the 1X pattern of 1xEV-DO system, periodically search for the 1xEV-DO system with the hybrid access terminal that the 1X system communicates.In addition, when hybrid access terminal and 1xEV-DO system communication, hybrid access terminal with 1xEV-DO system communication in periodically search for the 1X system.
For example, may send to hybrid access terminal, the call signal such as voice call is received signal and short message from the 1X system with the hybrid access terminal of 1xEV-DO system communication response.In addition, hybrid access terminal periodically inserts the 1X system and arrives the 1X system with the location registers with itself, receives overhead messaging and update system resource such as system parameters message and access message.
But, as long as hybrid access terminal periodically inserts 1X, though hybrid access terminal with 1xEV-DO system communication, hybrid access terminal also must rest on the 1X system, has upgraded system resource up to fully.
In addition, when hybrid access terminal and 1xEV-DO system communication, have the signal that is lower than predetermined level and reach the preset time cycle (appointment parameter the system) if receive from hybrid access terminal by a data rate controlled (DRC) channel, the 1xEV-DO system can carry out call drop operation so.That is to say that no matter its reason how, reaches the preset time cycle if receive the signal that is lower than predetermined level by backward channel, the 1xEV-DO system carries out call drop at hybrid access terminal so, so that effectively utilize system resource.
But the 1xEV-DO system of current use has the structure that the reason of call drop operation is not provided to the user.That is to say, the 1xEV-DO system does not provide the information that makes the user can know the accurate reason of call drop operation to the user, even call drop may occur in various situation, for example, when when the 1xEV-DO system calls out the hybrid access terminal that is connected and transfers to electronic wave shadow zone, when communication system generation misoperation, or when hybrid access terminal switches to the 1X system.
Summary of the invention
Therefore, consider that the problems referred to above have made the present invention, thereby if an object of the present invention is to provide a kind of when multi-medium data being sent to hybrid access terminal from the 1xEV-DO system bid cancel and make hybrid access terminal to be connected to the 1X system, the method and system that the automatic calling of identification hybrid access terminal from the 1xEV-DO pattern to the 1X pattern switched according to the voice signal that sends from the 1X system.
According to an aspect of the present invention, providing a kind of is used for when taking place hybrid access terminal at the call drop of CDMA 2000 1xEV-DO systems (1xEV-DO system), recognize the system of the calling switching of CDMA2000 1X system (1X system), this system comprises: hybrid access terminal, operate in relevant with the 1X system, be used to receive from the voice signal transmission service of 1X system or the 1X pattern of low-rate data transmission service, with operate in relevant with the 1xEV-DO system, be used to receive 1xEV-DO pattern from the high speed data transfers service of 1xEV-DO system, when when the 1X system receives voice signal or low-rate data, with the hybrid access terminal of 1xEV-DO system communication switch to the 1X pattern with carry out be connected with the calling of 1X system and to/from 1X system transmission/reception speech and/or data; The 1X transceiver, be used for to/from hybrid access terminal transmission/reception voice signal and/or data; The 1X controller is used to control the transmission service of 1X transceiver; Mobile switching centre, be used for providing the communication access path of 1X system at the communication call that sends from hybrid access terminal, with the information stores of hybrid access terminal that is deposited with mobile switching centre in home location register (HLR) and storage be arranged in the information of hybrid access terminal in a district of mobile switching centre; 1xEV-DO access network transceiver subsystem, be used for to/from hybrid access terminal transmission/reception high data rate; With the 1xEV-DO access network controller, be used to control the high speed data transfers service of 1xEV-DO access network transceiver subsystem, if the 1xEV-DO system and and between the hybrid access terminal of 1xEV-DO system communication bid cancel, so when receiving one from hybrid access terminal when having the signal that is lower than predetermined level, send the message that whether receives voice signal or low speed data in the inquiry hybrid access terminal to mobile switching centre, with when receiving from mobile switching centre can check the message that whether receives voice signal or low-rate data the hybrid access terminal time, the identification hybrid access terminal switches to the 1X pattern.
According to an aspect of the present invention, provide a kind of and be used for that time identification switches to the method that the calling of CDMA 2000 1X systems (1X system) is switched from CDMA 2000 1xEV-DO systems (1xEV-DO system) from the 1xEV-DO mode switch to the 1X pattern when hybrid access terminal, the method comprising the steps of: (a) sequentially start the 1X pattern and the 1xEV-DO pattern of hybrid access terminal, make hybrid access terminal rest on idle condition; (b) utilize and to be in the state hybrid access terminal down that hybrid access terminal rests on idle condition, at 1X pattern and 1xEV-DO pattern execution double monitoring; (c) allow hybrid access terminal in the 1xEV-DO pattern, to call out and be connected and enter service condition, thereby make hybrid access terminal can send/receive high data rate with the 1xEV-DO system; (d) bid is cancelled between hybrid access terminal and 1xEV-DO system; (e) when hybrid access terminal during, carry out being connected with the calling of 1X system from the 1xEV-DO mode switch to the 1X pattern; (f) send the message that whether receives voice signal or low-rate data in the inquiry hybrid access terminal to mobile switching centre; (g) from mobile switching centre receive can check the message that whether receives voice signal or low-rate data the hybrid access terminal and identification hybrid access terminal from the 1xEV-DO mode switch to the 1X pattern.
Description of drawings
By detailed description below in conjunction with accompanying drawing, can more clearly understand above-mentioned and other purposes of the present invention, feature and advantage, wherein:
Fig. 1 is what to show according to an enforcement of the present invention, is used to discern the schematic block diagram of the system that the calling from the 1xEV-DO pattern to the 1X pattern switches;
Fig. 2 a shows the block diagram of channel architecture be used for by the 1xEV-DO system data being sent to the forward link of hybrid access terminal;
Fig. 2 b shows to be used for data being sent to the structure of time slot of forward link of hybrid access terminal and the block diagram of data structure by the 1xEV-DO system;
Fig. 3 shows the block diagram of channel architecture be used for data are sent to from hybrid access terminal the reverse link of 1xEV-DO system; With
Fig. 4 a and 4b show according to one embodiment of present invention, the flow chart of the process that the calling of identification from the 1xEV-DO pattern to the 1X pattern switched.
Embodiment
Below at length with reference to the preferred embodiments of the present invention.Be illustrated in the components identical shown in other accompanying drawings with identical reference number.Below of the present invention, in the explanation, deleted the explanation that may cause unclear known function of technical theme of the present invention and structure for those.
Fig. 1 shows that according to one embodiment of present invention when hybrid access terminal switched to the 1X pattern owing to the communication disruption with the 1xEV-DO system, identification was from the schematic block diagram of the system that the calling of 1xEV-DO pattern is switched.
As shown in fig. 1, system 100 of the present invention comprise 1xEV-DO system and 1X system the two.System 100 has the structure that is used for receiving according to the 1X method voice transmission service or low-rate data transmission service, and it comprises hybrid access terminal 110, 1X transceiver 122,1X controller 132 and mobile switching centre (MSC) 140.In addition, system 100 has the structure that is used for receiving according to the 1xEV-DO method high speed data transfers service, it comprises hybrid access terminal 110,1xEV-DO access network transceiver subsystem (ANTS) 124,1xEV-DO access network controller (ANC) 134, packet data serving node (after this abbreviating PDSN as) 150 and Internet protocol (IP) network.
Operate in handoff functionality between 1X system and the 1xEV-DO system and be and rely on the software control that is stored in mobile station modems (MSM) chip, mobile station modems (MSM) chip is a kind of baseband modem chip that is contained in the hybrid access terminal 110.In addition, handoff functionality is to finish by the frequency that the searcher that use is connected to the MSM chip is followed the tracks of each network.That is, when hybrid access terminal 110 during from the 1xEV-DO mode switch to the 1X pattern, searcher module is followed the tracks of the frequency of 1X system under the control of MSM chip.In addition, when hybrid access terminal 110 during from the 1X mode switch to the 1xEV-DO pattern, the frequency of searcher module tracks 1xEV-DO system.
Under the situation of the forward link that sends high data rate from the 1xEV-DO system to hybrid access terminal 110, the channel that utilizes CDMA (code division multiple access) method to cut apart can send data by the time slot that utilizes TDM (time division multiplexing) method to cut apart, thereby can send lot of data.On the contrary, under the situation of the reverse link that sends data from hybrid access terminal 110 to 1xEV-DO access network transceiver subsystem 124 and 1xEV-DO access network controller 134, send data to a plurality of users by habitual CDMA method.
In addition, the hybrid access terminal 110 that receives high data rate from the 1xEV-DO system periodically switches to the 1X pattern with the preset time cycle, so that check whether receive voice signal or low-rate data by the 1X system, and turns back to the 1xEV-DO pattern.
When hybrid access terminal 110 provides multimedia service, because the dialogue of relevant hybrid access terminal 110 is with the release that is connected and bid when cancelling, the 134 calculating preset time cycles of 1xEV-DO controller of communicate by letter with hybrid access terminal 110.This guarantees that hybrid access terminal has time enough and turns back to that to call out connection status required, because, because abominable electric wave environmental condition or when hybrid access terminal is positioned at electronic wave shadow zone, temporarily bid is cancelled.
Next, when calculating the scheduled time, when the signal that receives from hybrid access terminal 110 during less than predetermined level, maybe when not when hybrid access terminal 110 receives signal, 1xEV-DO controller 134 sends the message that whether receives voice signal in the inquiry hybrid access terminal 110 to mobile switching centre 140, and this message comprises the mobile logo number (after this being called MIN) and Electronic Serial Number (after this being called ESN) information of hybrid access terminal 110.Then, when receiving from mobile switching centre 140 can check the message that whether receives voice signal the hybrid access terminal 110 time, the calling that 1xEV-DO controller 134 identifies hybrid access terminal 110 connects the 1X pattern that switches to.
In addition, mobile switching centre 140 is by the home location register (after this abbreviating " HLR " as) 132 from be deposited with the database of information of the hybrid access terminal the mobile switching centre 140 as storage, visitor location register (after this abbreviating " VLR " as) 134 with hybrid access terminal 110 database of information in the zone that is arranged in mobile switching centre 140 as storage, obtain the profile information (profile information) of hybrid terminal 110, and handle the call signal of hybrid access terminal 110.Here, profile information comprises MIN, ESN, and supplemental services.
1xEV-DO system as the block data system that only sends data is connected to PDSN 150 according to TCP/IP, so that with the form of IP grouping, to/send/receive various data from IP network 160.In addition, the 1xEV-DO system receives grouped data that will send to hybrid access terminal and the grouped data (for example, MPEG grouped data) that is used for packet data service according to the grouped data generation that receives from IP network 160.Then, the 1xEV-DO system sends to hybrid access terminal 110 by the time slot of cutting apart with the TDM method with the grouped data that produces.In addition, the 1xEV-DO system utilizes the CDMA data to produce grouped data, and grouped data is sent to PDSN 150 from the CDMA data that hybrid access terminal 110 receives by the modulation of CDMA method.
Under the situation of forward link, 1xEV-DO sends data with its maximum power when the hard handoff handoff functionality is provided, and does not use the power control of wireless base station.But, under the situation of reverse link, when softer or soft hand-off functionality is provided, in each terminal, carry out power control.
In addition, according to the present invention, when hybrid access terminal 110 operates in 1xEV-DO system communication, periodically switched to the 1X pattern so that receive voice signal.When the voice signal that receives from the 1X system, hybrid access terminal 110 switches to the 1X pattern, calls out with the 1X system to be connected, thereby carries out Speech Communication.Mobile switching centre 140 identifies hybrid access terminal 110 and calls out with the 1X system and be connected.
When hybrid access terminal 110 switches to the 1X pattern that is used for Speech Communication, in the 1xEV-DO system, receive the DRC channel, have the signal that is lower than predetermined level and reach one period preset time cycle.Then, bid is cancelled.The 1xEV-DO system will inquire that the message that whether receives voice signal in the hybrid access terminal 110 sends to mobile switching centre 140.Then, when receiving the response message of this message, owing to sent voice signal from the 1X system, so 1xEV-DO identifies the call drop that has caused hybrid access terminal 110.
Fig. 2 a shows the block diagram to the channel architecture of the forward link of hybrid access terminal 110 transmission data by the 1xEV-DO system.
As shown in Fig. 2 a, forward link comprises pilot channel, medium access control (MAC) channel, control channel, and Traffic Channel.Provide pilot channel to be used to make the 1xEV-DO system can follow the tracks of the pilot signal of hybrid access terminal 110 with transmission.Hybrid access terminal 110 receives at least one pilot signal by pilot channel, and inserts the wireless base station that has sent the pilot signal with maximum intensity.In addition, the reference of the coherent detection that pilot channel is carried out as the wireless base station that relies on 110 pairs of hybrid access terminals to have the 1xEV-DO system.
The MAC channel is mainly used in the control reverse link, and comprises reverse activity (RA) channel, and reverse power control (RPC) channel.Here, the RA channel is used for determining the transmission rate of reverse link.In addition, the RA channel can be used for channel at reverse link when saturated, and request hybrid access terminal 110 reduces transmission rates.In addition, the RPC channel is used for when hybrid access terminal 110 sends signal or data by reverse link, the control transmitted power.
Control channel is used for sending broadcast from the 1xEV-DO system to hybrid access terminal 110, or is used to send direct message, so that directly control specific hybrid access terminal.When the 1xEV-DO system when hybrid access terminal 110 only sends grouped data, use Traffic Channel.
Below with reference to structure of time slot and the data structure in Fig. 2 b explanation forward link.At first, forward link comprises 16 time slots of every frame, and every frame has the time interval of about 26.67ms.In addition, each time slot comprises half time slot with 1024 chips and back half time slot with 1024 chips, that is, time slot has 2048 chips altogether.In addition, given each time slot allocation the time interval of 1.67ms.
More particularly, half time slot of half time slot and back comprises 400 data time slot code sheets, 64 MAC time slot chips, 96 pilot time slot chips, 64 MAC time slot chips and 400 data time slot code sheets separately.
Fig. 3 shows from the block diagram of hybrid access terminal 110 to the channel architecture of the reverse link of 1xEV-DO system transmission data.
Reverse link shown in Fig. 3 can use the CDMA method in the mode identical with the 1X system, and mainly comprises access channel and Traffic Channel.Access channel has pilot channel and data channel, and Traffic Channel has pilot channel, MAC channel, Ack channel, and data channel.Here, the MAC channel is divided into reverse rate indicator (RRI) channel and data transfer rate control (DRC) channel once more.
Access channel is used for sending connection _ request (origination connection_request) message and deposit route _ renewal (registration route_update) message of starting.Access channel has the low transmission rate of 9.6kbps at the stabilisation of wireless channel.
The same with the pilot channel in the forward link shown in Fig. 2 a, the reference of the coherent detection that the pilot channel shown in Fig. 3 carries out as the wireless base station that relies on 110 pairs of hybrid access terminals to have the 1xEV-DO system.Hybrid access terminal 110 inserted the required data of 1xEV-DO system when data channel was used to send.
Traffic Channel is used when the 1xEV-DO system sends grouped data at hybrid access terminal 110.Traffic Channel provides various message transmission rate according to wireless communications environment.
Pilot channel is carried out the function identical functions with pilot channel, and this function is illustrated with reference to access channel.The MAC channel is used to control the message transmission rate of Traffic Channel, thereby makes that the MAC channel can exist when hybrid access terminal 110 is connected to the 1xEV-DO system.The RRI channel of MAC channel is used for representing the information of the data transmission rate of Traffic Channel when hybrid access terminal 110 sends data by Traffic Channel.The RRI value is presented in the hybrid access terminal 110.
In addition, the DRC channel is determined according to the channel circumstance of forward link can demodulated data speed, and with the data rate informing base station.That is, 1xEV-DO access network transceiver subsystem 124 utilizes the time slot of forward link to send grouped data to hybrid access terminal 110.At this moment, the basis of determining the transmission of packet data rate is the DRC substitution value (covervalue) that hybrid access terminal 110 sends.In order to determine the DRC substitution value, hybrid access terminal 110 is measured C/I (carrier wave ratio interference) value that sends from 1xEV-DO access network transceiver subsystem 124, and the DRC substitution value of definite peak transfer rate.
Fig. 4 a and 4b show flow chart according to an embodiment of the invention, that 1xEV-DO system identification hybrid access terminal 110 switches to the process of 1X pattern.
When the user connected the power supply of hybrid access terminal 110, hybrid access terminal 110 received pilot signal from the 1X controller 132 and the 1X transceiver 122 of 1X system, thereby starts the 1X pattern, and hybrid access terminal 110 is remained on idle condition.In addition, hybrid access terminal 110 utilizes the system parameters message that obtains when starting the 1X pattern, with pilot signal from 1xEV-DO access network controller 134 and 124 transmissions of 1xEV-DO access network transceiver subsystem, start the 1xEV-DO pattern, then, hybrid access terminal 110 is remained on idle condition (S410).
In idle condition, hybrid access terminal 110 is the 1X pattern with the operating and setting of terminal basically, and waits for communication.
After having started 1X pattern and 1xEV-DO pattern, hybrid access terminal 110 is in the double monitoring of carrying out under the 1X pattern between 1X pattern and the 1xEV-DO pattern (S420).Under the 1X pattern, hybrid access terminal 110 is monitored the 1xEV-DO pattern in 5.12 seconds time cycle.Here, in double monitoring, whether the hybrid access terminal 110 main observations under the 1X pattern receive signal or data from 1X transceiver 122.After 5.12 seconds, hybrid access terminal 110 switches to the 1xEV-DO pattern with its operator scheme, so that observe whether sent data from 1xEV-DO access network transceiver subsystem 124, then, turns back to the 1X pattern.
In addition, when at hybrid access terminal 110 time in idle condition monitoring 1X system and 1xEV-DO system, when the user asked from the transfer of data of 1xEV-DO access network transceiver subsystem 124, hybrid access terminal 110 determined whether to enter the service condition (S430) that activates 1xEV-DO pattern and transmission/reception data.
In order to enter the service condition of 1xEV-DO pattern, hybrid access terminal 110 must be set up the connection and the dialogue of relevant 1xEV-DO access network transceiver subsystem 124, so that to/from 1xEV-DO access network transceiver subsystem 124 transmission/reception data.Here, connect representative logical communication path that set up, that be used for message transmission between the system of a terminal and a transmission information, and the dialogue representative in by message and mutual identification so as after to communicate by letter between execution terminal and the system up to time cycle of sign off.
Therefore, in order to receive data from 1xEV-DO access network transceiver subsystem 124, the connection request message that hybrid access terminal 110 will be used to form connection sends to 1xEV-DO access network transceiver subsystem 124, so that request call connects.Respond this request, connection and dialogue that 1xEV-DO access network transceiver subsystem 124 is set up about hybrid access terminal 110 connect so that carry out to call out.Between hybrid access terminal 110 and 1xEV-DO access network transceiver subsystem 124, carried out call out be connected after, hybrid access terminal 110 enters the service condition of transmission/reception data.
At step S430, when having entered the service condition of 1xEV-DO pattern, hybrid access terminal 110 to/from 1xEV-DO system transmission/receiving block data (S440).
Meanwhile, when the 1xEV-DO system and and the hybrid access terminal 110 of 1xEV-DO system communication between send grouped data in, when the user of hybrid access terminal 110 moves in shadow region or the blasnket area, owing to disturb and interrupt, make formation between hybrid access terminal 110 and the 1xEV-DO access network transceiver subsystem 124 be connected and dialogue is released.Therefore, communication disruption has taken place.
When hybrid access terminal 110 receives from the voice signal of 1X system or data (S450), hybrid access terminal 110 from the 1xEV-DO mode switch to the 1X pattern.In this state, hybrid access terminal 110 usefulness wireless modes send the message that request calls connect to 1X transceiver 112, connect so that carry out the calling of relevant 1X system.Then, hybrid access terminal 110 to/from 1X transceiver 122 transmission/reception voice signal and data.
When calling out when being connected carrying out between hybrid access terminal 110 and the 1X system, mobile switching centre 140 will be arranged in the information stores of hybrid access terminal 110 in a district of mobile switching centre 140 at VLR 134, and handle the call signal of hybrid access terminal 110 according to the profile information that is stored in the hybrid access terminal 110 among the VLR 134.
Meanwhile, when to/from 1xEV-DO transmission/receiving block data the time, when hybrid access terminal 110 was carried out and is connected with the calling of 1X system, the intensity of the signal of communicating by letter between hybrid access terminal 110 and the 1xEV-DO system promptly reduced, or bid is cancelled.
Therefore, when receiving when having the signal that is lower than predetermined level from hybrid access terminal 110 by the DRC channel, 1xEV-DO access network controller 134 calculates preset time (can pass through a parameter regulation), for example, 6 seconds (S460) is so that guarantee when because interference or the interception and temporary transient bid cancel or bid when cancelling recover call out connection required time of hybrid access terminal 110 after moving to shadow region or blasnket area.
When having passed through preset time, for example, the past 6 seconds (S470), 1xEV-DO access network controller 134 judges whether to receive from hybrid access terminal 110 has the signal (S480) that is lower than predetermined level.Here, if hybrid access terminal 110 is in the state that temporary transient bid is cancelled, carries out so once more and call out connection.Therefore, between hybrid access terminal 110 and 1xEV-DO system, send signal, that is, have the grouped data of normal level with the level that is higher than predetermined level.
But, has the signal that is lower than predetermined level when receiving from hybrid access terminal 110, even or preset time is when in the past hybrid access terminal 110 still remains on the call drop state (S480), 1xEV-DO access network controller 134 will inquire that the message that whether receives voice signal or low-rate data in the hybrid access terminal 110 sends to mobile switching centre 140 (S490) together with the MIN and the ESN information of hybrid access terminal 110.
Just carry out between hybrid access terminal 110 and 1X system owing to call out to connect, mobile switching centre 140 checks the message that sends from 1xEV-DO access network controller 134.In addition, mobile switching centre 140 can check that the message that whether receives voice signal or low speed data in the hybrid access terminal 110 sends to 1xEV-DO access network controller 134.Therefore, 1xEV-DO access network controller 134 receives from mobile switching centre 140 and can check the message (S510) that whether receives voice signal the hybrid access terminal 110.
When receiving from mobile switching centre 140 can check the message that whether receives voice signal or low speed data the hybrid access terminal 110 time, 1xEV-DO access network controller 134 is checked these message, and identifies hybrid access terminal 110 according to the voice signal that sends from the 1X system or low-rate data and be switched to the 1X pattern.Otherwise 1xEV-DO access network controller 134 is judged because call drop has taken place difficulty of bad wireless communication environment.Here, when the system misoperation such as 1xEV-DO access network transceiver subsystem 124 and 1xEV-DO access network controller 134, itself can identify the misoperation of system the 1xEV-DO system, so except determining that hybrid access terminal 110 receives voice signal or the low speed data, the 1xEV-DO system also can determine owing to call drop has taken place difficulty of bad wireless communication environment.
1xEV-DO access network controller 134 temporarily is stored in (S520) in the predetermined memory area with the identifying information of call drop.Then, when time-out offers the multi-medium data transmission service of hybrid access terminal 110, or when carrying out with the communicating by letter of hybrid access terminal 110,1xEV-DO access network controller 134 is with reference to this information.
According to one embodiment of present invention, when when bid is cancelled when the 1X system provides multi-medium data transmission service from the 1xEV-DO system, by to the switching of the relevant hybrid access terminal of 1X system interrogation and receive its response, the 1xEV-DO system can go out hybrid access terminal according to the voice signal that sends from the 1X system or data identification and automatically switch to the 1X pattern.
From above-mentioned explanation, can see, prior art problems is, when bid was cancelled when sending data between 1xEV-DO system and hybrid access terminal when, the 1xEV-DO system can not identify hybrid access terminal and switch to the 1X pattern to carry out Speech Communication continuously.According to the present invention, the 1xEV-DO system can identify hybrid access terminal in real time and switch to the 1X pattern to carry out Speech Communication.
Therefore, the method for switching according to call identifying of the present invention makes the 1xEV-DO system to identify and to mix the 1X pattern that is switched to that inserts when bid is cancelled when hybrid access terminal provides multimedia service.Therefore, when bid is cancelled, the invention enables the user can find the definite reason of call drop, even call drop may take place in all cases, for example, when hybrid access terminal moves to electronic wave shadow zone, when the 1xEV-DO system misoperation, or when hybrid access terminal switches to the 1X pattern of Speech Communication.In addition, according to the present invention, when bid is cancelled, can suspend data transport service from the 1xEV-DO system to hybrid access terminal.Therefore, can prevent the overload of 1xEV-DO system and the waste of the communication resource.
Although combined the current most realistic and preferred embodiment explanation the present invention that thinks, but, should be appreciated that to the invention is not restricted to disclosed embodiment and accompanying drawing, but opposite, the present invention should comprise the interior various modifications and the change of spirit and scope of claims.
Claims (23)
1. one kind is used for when taking place hybrid access terminal at the call drop of CDMA 2000 1xEV-DO systems (1xEV-DO system), recognizes the system that the calling of CDMA 2000 1X systems (1X system) is switched, and this system comprises:
Hybrid access terminal, operate in relevant with the 1X system, be used to receive from the voice signal transmission service of 1X system or the 1X pattern of low-rate data transmission service, with operate in relevant with the 1xEV-DO system, be used to receive 1xEV-DO pattern from the high speed data transfers service of 1xEV-DO system, when when the 1X system receives voice signal or low-rate data, the hybrid access terminal with 1xEV-DO system communication switches to the 1X pattern, with carry out be connected with the calling of 1X system and to/from 1X system transmission/reception speech and/or data;
The 1X transceiver, be used for to/from hybrid access terminal transmission/reception voice signal and/or data;
The 1X controller is used to control the transmission service of 1X transceiver;
Mobile switching centre, be used at communication call from the hybrid access terminal transmission, the communication access path of 1X system is provided, with the information stores that is deposited with the hybrid access terminal in the mobile switching centre in home location register (HLR) and storage be arranged in the information of hybrid access terminal in a district of mobile switching centre;
1xEV-DO access network transceiver subsystem, be used for to/from hybrid access terminal transmission/reception high data rate; With
The 1xEV-DO access network controller, be used to control the high speed data transfers service of 1xEV-DO access network transceiver subsystem, if the 1xEV-DO system and and the hybrid access terminal of 1xEV-DO system communication between bid cancel, so when receiving the signal that is lower than predetermined level from hybrid access terminal, send the message that whether receives voice signal or low-rate data in the inquiry hybrid access terminal and identify hybrid access terminal can check the message that whether receives voice signal or low-rate data the hybrid access terminal time and switch to the 1X pattern to mobile switching centre when receiving from mobile switching centre.
2. system according to claim 1, the hybrid access terminal that wherein receives data with 1xEV-DO system communication periodically switches to the 1X pattern with the preset time cycle, whether receive voice signal with inspection, and turn back to the 1xEV-DO pattern by the 1X system.
3. system according to claim 1, wherein hybrid access terminal is set to the 1X pattern in its idle condition, so that communicate with the 1X system, and periodically switch to the 1xEV-DO pattern with the preset time cycle, whether receive data and turn back to the 1X pattern by the 1xEV-DO system so that check.
4. system according to claim 1, wherein the 1xEV-DO access network controller message that whether inquiry received voice signal in the hybrid access terminal sends to mobile switching centre together with the mobile logo of relevant hybrid access terminal number and Electronic Serial Number information.
5. system according to claim 1 wherein by under the control of mobile station modems chip, utilizes the frequency of searcher module tracks 1X system, and hybrid access terminal from the 1xEV-DO mode switch to the 1X pattern.
6. system according to claim 1, wherein under the situation of the forward link that sends data from the 1xEV-DO system to hybrid access terminal, use time division multiple access (TCMA) method and
Employing code division multiple access (CDMA) method under the situation of the reverse link that sends data from hybrid access terminal to the 1xEV-DO system.
7. system according to claim 6, wherein under the situation of the forward link that sends data from the 1xEV-DO system to hybrid access terminal, do not carry out by sending data that power control ground carries out that hard handoff switches with maximum power and
Under the situation of reverse link, when each hybrid access terminal is carried out power control, carry out soft handover.
8. system according to claim 7, wherein forward link comprises:
Pilot channel is used to send the pilot signal that makes the 1xEV-DO system can follow the tracks of hybrid access terminal;
Media into control channel is used to control reverse link;
Control channel is used for sending broadcast or directly controlling the direct message that specific blend accesses terminal to hybrid access terminal from the 1xEV-DO system; With
Traffic Channel is used for only sending grouped data from the 1xEV-DO system to hybrid access terminal.
9. system according to claim 8 wherein relies on hybrid access terminal with the reference of pilot channel as the coherent detection of the wireless base station with 1xEV-DO system.
10. system according to claim 8, wherein hybrid access terminal receives at least one pilot signal by pilot channel, and inserts the wireless base station that sends the pilot signal with maximum intensity.
11. system according to claim 1, wherein when the call drop of hybrid access terminal takes place, to/calculate preset time from the 1xEV-DO access network controller of hybrid access terminal transmission/reception high data rate, and when having passed through the scheduled time, determine whether to receive the signal that is lower than predetermined level from hybrid access terminal.
12. a method that is used for when hybrid access terminal time identification calling switching from CDMA 2000 1xEV-DO systems (1xEV-DO system) to CDMA 2000 1X systems (1X system) from the 1xEV-DO mode switch to the 1X pattern, the method comprising the steps of:
(a) sequentially start the 1X pattern and the 1xEV-DO pattern of hybrid access terminal, thereby make hybrid access terminal rest on idle condition;
(b) hybrid terminal that utilizes hybrid access terminal to rest under the state of idle condition is carried out double monitoring at 1X pattern and 1xEV-DO pattern;
(c) hybrid access terminal that allows to be in the 1xEV-DO pattern and 1xEV-DO system call out and are connected and enter service condition, thereby make hybrid access terminal can send/receive high data rate;
(d) bid is cancelled between hybrid access terminal and 1xEV-DO system;
(e) when hybrid access terminal during, carry out being connected with the calling of 1X system from the 1xEV-DO mode switch to the 1X pattern;
(f) send the message that whether receives voice signal or low-rate data in the inquiry hybrid access terminal to mobile switching centre; With
(g) receive from mobile switching centre and can check the message that whether receives voice signal or low-rate data the hybrid access terminal, and identify hybrid access terminal from the 1xEV-DO mode switch to the 1X pattern.
13. method according to claim 12, wherein, at step (a), the system parameters that the hybrid access terminal utilization obtains when starting the 1X pattern starts the 1xEV-DO pattern.
14. method according to claim 12, wherein, at step (c), periodically switch to the 1X pattern with the hybrid access terminal of 1xEV-DO system communication, reception data with the preset time cycle, so that check whether receive voice signal or low-rate data, and turn back to the 1xEV-DO pattern by the 1X system.
15. method according to claim 12, wherein, at step (e), the calling switching from the 1xEV-DO pattern to the 1X pattern is to carry out by the frequency of the searcher module tracks 1X system under the control that utilizes the mobile station modems chip during being contained in hybrid access terminal.
16. method according to claim 12, wherein, at step (f), the message whether the 1xEV-DO access network controller receives inquiry in the hybrid access terminal voice signal or low-rate data sends to mobile switching centre together with the mobile logo of relevant hybrid access terminal number and Electronic Serial Number information.
17. method according to claim 12, wherein, at step (c), between hybrid access terminal and 1xEV-DO system, set up be connected with dialogue after carry out calling and be connected.
18. method according to claim 12, wherein, at step (a), the hybrid access terminal that will be in idle condition is set to the 1X pattern, so that communicate with the 1X system, and under the 1X pattern, periodically switch to the 1xEV-DO pattern,, and turn back to the 1X pattern so that check whether receive high data rate by the 1xEV-DO system with the preset time cycle.
19. method according to claim 17, wherein dialogue is by setting to the access terminal identification of 1xEV-DO system request uniqueness symbol (UATI) and from 1xEV-DO system assignment UATI,
Access terminal identification symbol be the representative of the hybrid access terminal number of giving hybrid access terminal from the 1xEV-DO system assignment identifier (ID) and
Be set in the parameter of using in high data rate call establishment, power control and the handover when between hybrid access terminal and 1xEV-DO system, setting up dialogue.
20. method according to claim 12, wherein under the situation of the forward link that sends data from the 1xEV-DO system to hybrid access terminal, use time division multiple access (TDMA) method and
Under the situation of the reverse link that sends data from hybrid access terminal to the 1xEV-DO system, employing code division multiple access (CDMA) method.
21. method according to claim 20, wherein forward link comprises:
Be used to send and make the 1xEV-DO system can follow the tracks of the pilot channel of the pilot signal of hybrid access terminal;
Be used to control the media into control channel of reverse link;
Be used for sending broadcast or directly controlling the control channel of the direct message that specific blend accesses terminal to hybrid access terminal from the 1xEV-DO system; With
Be used for only sending to hybrid access terminal the Traffic Channel of grouped data from the 1xEV-DO system.
22. method according to claim 21 wherein relies on hybrid access terminal with the reference of pilot channel as the coherent detection of the wireless base station with 1xEV-DO system.
23. method according to claim 21, wherein hybrid access terminal receives at least one pilot signal by pilot channel, and inserts the wireless base station that has sent the pilot signal with maximum intensity.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20020087438 | 2002-12-30 | ||
| KR1020020087438 | 2002-12-30 | ||
| KR1020030053895 | 2003-08-04 |
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| CN1757180A true CN1757180A (en) | 2006-04-05 |
| CN100495949C CN100495949C (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801100331A Expired - Fee Related CN100495949C (en) | 2002-12-30 | 2003-12-12 | Method and system for recognizing call switch-over from 1XEV-DO system to 1X system |
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| KR (1) | KR100403233B1 (en) |
| CN (1) | CN100495949C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111815A (en) * | 2011-02-28 | 2011-06-29 | 华为技术有限公司 | Method and device for controlling load balance |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101237586B1 (en) * | 2006-11-06 | 2013-02-26 | 주식회사 엘지유플러스 | System and Method for Processing Change to Voice Call in Mobile Communication Network Having 1x EV-DO Mode and 1x Mode |
| KR101086754B1 (en) | 2009-02-09 | 2011-11-25 | 주식회사 비즈모델라인 | Mobile Devices for Using Multi Mobile Devices |
-
2003
- 2003-08-04 KR KR1020030053895A patent/KR100403233B1/en not_active IP Right Cessation
- 2003-12-12 CN CNB2003801100331A patent/CN100495949C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111815A (en) * | 2011-02-28 | 2011-06-29 | 华为技术有限公司 | Method and device for controlling load balance |
| CN102111815B (en) * | 2011-02-28 | 2013-12-18 | 华为技术有限公司 | Method and device for controlling load balance |
| US8867416B2 (en) | 2011-02-28 | 2014-10-21 | Huawei Technologies Co., Ltd. | Method and apparatus for controlling load balance |
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| Publication number | Publication date |
|---|---|
| KR100403233B1 (en) | 2003-10-23 |
| CN100495949C (en) | 2009-06-03 |
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