KR20060118807A - Method for searching is-2000 paging channel during 1xev-do traffic and mobile phone implementing the method and method for informing mobile phone in 1xev-do traffic mode of the time to search is-2000 paging channel - Google Patents

Abstract

A method for searching an IS-2000 paging channel during 1xEV-DO(Evolution Data Only) call, a mobile communication terminal adopted with the method, and a method for notifying the mobile communication terminal which is in 1xEV-DO call whether the IS-2000 paging channel is searched in a 1xEV-DO system are provided to search the IS-2000 paging channel only when the 1xEV-DO system notifies that the searching is necessary, through a control channel, without periodically searching the IS-2000 paging channel, thus reduction in data throughput of the terminal can be prevented. If a control channel is incoming in 1xEV-DO data speech state, a mobile communication terminal confirms whether a paging channel search field is set as '1'(S510). If so, the terminal searches a paging channel of an IS-2000 system(S520). If a message for voice call connection is included in the paging channel of the IS-2000 system(S530), the terminal performs a voice call through the IS-2000 system(S540). If the voice call is terminated, the terminal continues a 1xEV-DO data call(S550).

Description

Searching for the IS-2000 paging channel during one-X video call, and the mobile communication terminal adopting the method and the mobile communication terminal for the one-X video call in the One-X video system. {Method for searching IS-2000 paging channel during 1xEV-DO traffic and mobile phone implementing the method and method for informing mobile phone in 1xEV-DO traffic mode of the time to search IS-2000 paging channel}

FIG. 1 is a conceptual diagram illustrating a CDMA2000 1x and 1x EV-DO service provided to a terminal providing both CDMA2000 1x and 1x EV-DO services.

FIG. 2A is a block diagram showing an example of configuring a terminal using an MSM6500 capable of simultaneously processing a CDMA2000 1x and 1x EV-DO using a single chip, and FIG. 2B is related to the CDMA2000 1x and 1x EV-DO services in FIG. 2B. It is a schematic conceptual illustration of the part.

3 is a conceptual diagram illustrating a method of searching for an IS-2000 paging channel during a conventional 1xEV-DO call.

4 is a conceptual view illustrating a method of searching for an IS-2000 paging channel during a 1xEV-DO call of the present invention.

5 is a flowchart illustrating an operation of a mobile communication terminal.

<Description of Symbols for Main Parts of Drawings>

100 Mobile communication terminal 200 IS-2000 system

300 1xEV-DO System 400 Mobile Network

The present invention provides a method for searching for an IS-2000 paging channel during a 1xEV-DO call, a mobile communication terminal adopting the method, and a mobile communication terminal for a 1xEV-DO call in a 1xEV-DO system, indicating whether to search for an IS-2000 paging channel. In particular, the present invention relates to a method for searching an IS-2000 paging channel without searching every IS-2000 paging channel during a 1xEV-DO call in a mobile communication terminal supporting both 1xEV-DO and IS-2000. In addition, the present invention relates to a mobile communication terminal adopting this method and a method for informing a mobile communication terminal of a 1xEV-DO system whether to search for an IS-2000 paging channel in a 1xEV-DO system.

CDMA 1x EV (Evolution) -DO (Data Only) is a dedicated protocol for packet data transmission that is completely different from the existing IS-2000 wireless protocol. It can be up to 2.4Mbps when the maximum transmission rate is in the forward direction. . This requires a base station device separate from the IS-2000 base station device, but the rest of the system and network components are commonly used.

1x EV-DO has a structure in which forward and reverse channel speeds are different because the service received from the system is predominant due to the nature of packet data. If the space diversity is not used in the terminal, it has an asymmetric data rate structure capable of up to 2.4 Mbps in the forward direction and 153.6 Kbps in the reverse direction.

In the case of IS-2000, since the high-speed packet data is implemented in the voice-oriented protocol, the maximum transmission rate is limited. In IS-2000 release 0, packet data can be transmitted up to 153.6 Kbps in the wireless section, but from the carrier's point of view, up to 64 Kbps can be allocated in the case of VOD (Video On Demand) due to capacity problems in the wireless section. However, basically, 1x EV-DO for packet data service can sufficiently solve the capacity problem of wireless section.

1x EV-DO is optimized for high speed packet transmission and uses the same frequency band as the current cdma2000 system using the IS-2000 protocol. However, the frequency channel generally uses a dedicated frequency channel separate from the cdma2000 system. to be. In particular, 1x EV-DO dynamically allocates the transmission speed of each subscriber in the wireless section and maximizes the efficiency of the wireless section and system by utilizing the unique characteristics of the packet data.

By using the 1x EV-DO high-speed data transmission technology, Mbps data transmission as defined in IMT-2000 can be achieved. Therefore, various services such as real-time video service, color content, and network game through a terminal such as a Mars phone are also possible.

The 1x EV-DO subscriber can use the cdma2000 and 1x EV-DO dual mode terminals to receive the existing cdma2000 voice service in normal times, and switch to the 1x EV-DO mode when needed to use the high-speed wireless data service.

1x EV-DO can be serviced by newly building base station equipment while using CDMA2000 system. On the system side, the wireless IP structure is directly connected from the base station to the packet network, and thus the packet data service can be maximized because the mobile switching center (MSC) does not have a strong circuit switched network characteristic. First, the definition of terms used here is as follows.

Terminal = AT (Access Terminal) = Terminal = MN (Mobile Node)

Base station = AN (Access Network) = BS (Base Station) = RN (Radio Node)

Since the base station processes the wireless protocol different from the IS-2000, a base station device separate from the existing base station device is required. Accordingly, 1x EV uses different terms of a terminal and a base station. The terminal is called an "AT" and the base station is called an "AN". The radio section protocol between the base station and the terminal corresponds to 1x EV-DO.

At the base station, BTS and BSC for 1x EV-DO must be added separately because the physical layer of 1x EV-DO is fundamentally different from that of IS-2000. In fact, on the service provider side, the service is provided in addition to the existing base station equipment. A terminal connected with 1x EV-DO is directly connected to a PDSN (Packet Data Serving Node) that processes radio data at a base station and receives related services. On the handset side, Qualcomm's MSM4500, MSM5500, and MSM6500, which handle 1x EV-DO, should be used. The MSM4500 is a modem chip that only handles 1x EV-DO, while the MSM5500 or MSM6500 can simultaneously handle CDMA2000 1x and 1x EV-DO as a single chip.

As such, an example of configuring a terminal using the MSM6500, which can simultaneously process CDMA2000 1x and 1x EV-DO with a single chip, is illustrated in FIG. 2A, and a portion related to CDMA2000 1x and 1x EV-DO services is conceptually illustrated. A simplified drawing is shown in FIG. 2b. That is, the MSM chip 110 includes a modem for processing a signal input through a wireless circuit unit, a 1xEV-DO processing module for processing a 1xEV-DO protocol, and an IS for processing an IS-2000 protocol. Including a -2000 processing module (CDMA processor), to process the signal from / to the wireless circuitry 120 to receive a CDMA2000 1x or 1x EV-DO service.

As such, the terminal 100 having a chipset capable of processing both CDMA2000 1x and 1x EV-DO may receive a mobile communication network through a base station 200 for processing CDMA2000 when receiving the CDMA2000 1x service as shown in FIG. 1. 400 to receive CDMA2000 service, and to receive packet service using 1x EV-DO, access the mobile communication network 400 through the base station 300 for processing 1x EV-DO to provide 1x EV-DO service. Will receive. As described above, the 1x EV-DO base station 300 may be implemented in a form in which equipment for supporting 1x EV-DO service is installed in the base station 200 for CDMA2000. Hereinafter, a system side including a base station 200 for providing a CDMA2000 service will be referred to as an IS-2000 system, and a system side including a base station 300 for providing a 1x EV-DO service will be referred to as a 1x EV-DO system. This is called.

On the other hand, the terminal supporting both IS-2000 service and 1x EV-DO service periodically receives IS-2000 paging channel to receive voice call from IS-2000 network while receiving packet data service in 1x EV-DO network. Should be searched.

To this end, conventionally, as illustrated in FIG. 3, the IS-2000 paging channel is periodically searched in a 1x EV-DO traffic state. At this time, the period P for searching the IS-2000 paging channel is generally coincident with a slot cycle. In the case of slot cycle index 2, the slot cycle is 5.12 seconds. Therefore, the terminal should tune to the IS-2000 system by changing from the 1x EV-DO system frequency to the IS-2000 frequency at such a period. In this case, in particular, if the GPM (General Page Message) is lowered in the IS-2000 system and the voice call is not connected, the time to tune to the IS-2000 frequency is about 1 frame (20ms).

However, at this time, in order to tune to the IS-2000 frequency every period P, additional warming-up time is required, so the actual time that the terminal does not stay at every 1x EV-DO system frequency is about several times of one frame. It's time.

As such, while the terminal performs 1x EV-DO packet communication, the IS-2000 system is searched for every period P. For this, tens of milliseconds or more are required. As a result, since 1x EV-DO packet communication cannot be performed during this time, the data throughput of the terminal is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and in searching for an IS-2000 paging channel while maintaining a 1x EV-DO traffic state, a method and method for preventing the reduction of data throughput of a terminal and a mobile communication terminal adopting the method The purpose is to provide.

In order to achieve the above object, the present invention provides a method for searching an IS-2000 paging channel during a 1xEV-DO call in a mobile communication terminal supporting both 1xEV-DO and IS-2000. A first step of checking whether a specific field is set in a control channel from a 1xEV-DO system and a second step of searching for an IS-2000 paging channel in a next cycle if the specific field is set. Equipped.

The specific field may be implemented as a field of 1 bit indicating whether 0 or 1 is to be searched for the IS-2000 paging channel. In addition, the period is 5.12 seconds as a period for searching the IS-2000 paging channel.

On the other hand, the second step, if a specific field is set, changing the frequency of the radio circuit to the IS-2000 frequency in the next cycle, searching for the paging channel of the IS-2000 system, and paging of the IS-2000 system If the channel does not include a message for voice call connection, changing the frequency of the radio circuit to 1xEV-DO frequency.

Meanwhile, in the 1xEV-DO system, when a 1xEV-DO communication terminal receives a message indicating that a voice call is connected to the mobile communication terminal from the IS-2000 system in order to inform whether the IS-2000 paging channel is searched or not, In addition, a specific field of a control channel periodically transmitted to the corresponding mobile communication terminal is set and transmitted. At this time, the specific field of the control channel may be implemented as a field of 1 bit indicating whether 0 or 1 to search the IS-2000 paging channel, the transmission period of the control channel is 256 slots.

On the other hand, when the 1xEV-DO system sets and transmits a specific field of the control channel, it is preferable to set and transmit the specific field of the control channel closest to the next period of the IS-2000 paging channel search period of the mobile communication terminal.

The mobile communication terminal supporting both the 1xEV-DO and the IS-2000 of the present invention adopting the method of the present invention includes a radio circuit unit for communication with a base station, a modem for processing a signal input through the radio circuit unit, and a 1xEV-. The controller includes a 1xEV-DO processing module for processing a DO protocol and an IS-2000 processing module for processing an IS-2000 protocol. The controller checks whether a specific field is set in a control channel from the 1xEV-DO system in a traffic state with the 1xEV-DO system, and if the specific field is set, performs a IS-2000 paging channel in the next cycle. Search.

In addition, if the specific field is set, the controller changes the frequency of the radio circuit to the IS-2000 frequency in the next cycle to search for a paging channel of the IS-2000 system and to connect a voice call to the paging channel of the IS-2000 system. If no message is included, change the frequency of the radio circuit to 1xEV-DO frequency. In this case, the specific field is a 1-bit field indicating 0 or 1 whether to search for an IS-2000 paging channel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Since the hardware configuration of the mobile communication terminal of the present invention is the same as the conventional mobile communication terminal, a detailed description thereof will be omitted, and the operation of the mobile communication terminal of the present invention will be described with reference to FIGS. 4 and 5.

4 is a conceptual view illustrating a method of searching for an IS-2000 paging channel during a 1xEV-DO call of the present invention.

The mobile communication terminal 100 supporting both 1xEV-DO and IS-2000 periodically receives a control channel synchronously from the 1xEV-DO system 300 in a 1xEV-DO traffic state. The period of the control channel is 256 slots, corresponding to 426.67 ms. The 1xEV-DO system 300 may specify and send a control channel to a specific terminal.

In the present invention, a new field (hereinafter referred to as a 'paging channel search field') is created in this control channel to inform the mobile communication terminal 100 of the 1xEV-DO system 300 whether to search for an IS-2000 paging channel. . The paging channel search field can also be configured with 1 bit. For example, if this field is '0', this indicates that the terminal does not need to search for the IS-2000 paging channel. If this field is '1', the terminal should search for the IS-2000 paging channel. Can be represented.

In general, since the existing terminal searches for the IS-2000 paging channel, the period P is 5.12 seconds, so that during this period P, all references to the paging channel search field specified as 0 or 1 in 12 control channels. . Therefore, the terminal does not need to search for the IS-2000 paging channel every period P in the 1X EV-DO traffic state, and the IS-2000 paging only when the 1xEV-DO system 300 indicates that the search is required through the control channel. Search for channels.

To this end, the 1xEV-DO system 300 normally sends a 0 to the paging channel search field and receives a message indicating that a voice call to the mobile communication terminal is connected from the IS-2000 system 200 to the 1xEV-DO call. The mobile station sets and transmits a paging channel search field of a control channel periodically transmitted to the corresponding mobile communication terminal.

On the other hand, since the period P for searching the IS-2000 paging channel is 5.12 seconds, all 12 control channels come to the terminal during this period. When the paging channel search field is set to '1' and transmitted, Among these 12 control channels, it is preferable to carry them on a control channel closest to the period P for transmission. By doing so, the terminal can search the paging channel at the time when the channel search period P is newly started immediately after receiving the control channel with the paging channel search field set.

Next, an operation in the mobile communication terminal will be described with reference to FIG. 5. 5 is a flowchart illustrating an operation of a mobile communication terminal.

When the control channel comes from the 1xEV-DO system 300 in the 1xEV-DO data call state, the mobile communication terminal 100 checks whether the paging channel search field is set to '1' (step S510).

If the paging channel search field is set to '1', the mobile communication terminal 100 changes the frequency of the radio circuit to the IS-2000 frequency to search for the paging channel of the IS-2000 system (step S520). This step is preferably performed in the search period closest to the time when the paging channel search field is received, that is, the next search period.

As a result of the search in step S520, when the paging channel of the IS-2000 system does not include a message for voice call connection (No in step S530), the frequency of the radio circuit is changed to 1xEV-DO frequency to 1xEV-DO. Continue the DO data call (step S550), and if the paging channel of the IS-2000 system includes a message for voice call connection (YES in step S530), perform a voice call through the IS-2000 system. (Step S540). When the voice call ends, the frequency of the radio circuit is changed again to the 1xEV-DO frequency to continue the 1xEV-DO data call (step S550).

As mentioned above, although this invention was demonstrated to the several example, this invention is not limited to a specific Example. Those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit of the invention.

As described above, according to the present invention, in searching for an IS-2000 paging channel while maintaining a 1x EV-DO traffic state, a control channel (Control) in a 1xEV-DO system is not required to be searched every P-cycle. Since the IS-2000 paging channel is searched only when it is indicated that the search is needed through the channel, the data throughput of the terminal can be prevented.

Claims (11)

In a method for searching an IS-2000 paging channel during a 1xEV-DO call in a mobile terminal supporting both 1xEV-DO and IS-2000, A first step of checking whether a specific field is set in a control channel from the 1xEV-DO system in a traffic state with the 1xEV-DO system; A second step of searching for the IS-2000 paging channel in the next period if the specific field is set; And searching for an IS-2000 paging channel during a 1xEV-DO call. The method of claim 1, And wherein the specific field is a 1-bit field indicating whether 0 or 1 is to be searched for an IS-2000 paging channel. 2. The method of claim 1, wherein the period is 5.12 seconds as a period for searching for an IS-2000 paging channel. The method of claim 1, wherein the second step, If the specific field is set, changing the frequency of the radio circuit to the IS-2000 frequency in the next cycle; Searching for the paging channel of the IS-2000 system; If the paging channel of the IS-2000 system does not include a message for voice call connection, changing the frequency of the radio circuit to 1xEV-DO frequency. And searching for an IS-2000 paging channel during a 1xEV-DO call. In the 1xEV-DO system in the 1xEV-DO busy mobile communication terminal to inform whether or not to search the IS-2000 paging channel, Receiving a message indicating that a voice call to the corresponding mobile communication terminal is connected from the IS-2000 system; Transmitting a specific field of a control channel periodically transmitted to a corresponding mobile communication terminal In the 1xEV-DO system having a 1xEV-DO call to the mobile communication terminal to inform the search whether the IS-2000 paging channel search. The method of claim 5, The specific field of the control channel is a 1-bit field indicating whether 0 or 1 is to be searched for IS-2000 paging channel IS-2000 paging to the mobile communication terminal 1xEV-DO in the 1xEV-DO system, characterized in that How to tell if your channel is searched. The method of claim 5, And a transmission period of the control channel is 256 slots in the 1xEV-DO system characterized in that whether or not to search the IS-2000 paging channel to the mobile communication terminal in the 1xEV-DO call. The method according to any one of claims 5 to 7, When the 1xEV-DO system sets and transmits a specific field of the control channel, the 1xEV-DO system sets and transmits a specific field of the control channel closest to the next period of the IS-2000 paging channel search period of the mobile communication terminal. How to tell IS-2000 Paging Channel to search for 1xEV-DO busy mobile communication system. In a mobile communication terminal supporting both 1xEV-DO and IS-2000, A radio circuit unit for communication with a base station, 1xEV-DO system including a modem for processing a signal input through a wireless circuit unit, a 1xEV-DO processing module for processing a 1xEV-DO protocol, and an IS-2000 processing module for processing an IS-2000 protocol. Control unit that checks whether a specific field is set in the control channel from the 1xEV-DO system in the traffic state with the controller and searches for the IS-2000 paging channel in the next cycle if the specific field is set. Mobile communication terminal comprising a. The method of claim 9, If the specific field is set, the controller changes the frequency of the radio circuit to the IS-2000 frequency in the next cycle to search for a paging channel of the IS-2000 system and connect a voice call to the paging channel of the IS-2000 system. If not included in the mobile communication terminal, characterized in that to change the frequency of the radio circuit to 1xEV-DO frequency. The method of claim 9 or 10, The specific field is a mobile communication terminal, characterized in that 1-bit field indicating 0 or 1 whether to search for the IS-2000 paging channel.

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