JP3483031B2 - Mobile terminal roaming method and mobile terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal roaming method and a mobile terminal, and more particularly to a portable telephone (P).
The present invention relates to a roaming method for a mobile terminal that roams at an office station (OS) in HS) and a mobile terminal to which the roaming method is applied.

[0002]

2. Description of the Related Art In mobile communication in an office station (OS) system, which is a system for business establishments, the OS is
The home OS system or the roaming-enabled OS system is registered on a system-by-system basis in a PHS terminal, which is a mobile terminal. However, there is only one home OS system and one or two or more OS systems that can roam.

Here, a PHS terminal is usually a home OS.
It is used in the system, but when it moves out of the range of the home OS system and a base station in the home OS system that can stand by (hereinafter, the base station is also referred to as CS) cannot be found, the roaming OS system When the CS is searched and a CS in the roaming OS system is found, the CS can be on standby and can make and receive calls. In this way, waiting for different OS systems is called roaming.

Conventionally, there are two patterns of waiting methods for the above roaming. The first waiting method is a method of waiting for a CS in an OS system registered as an OS system capable of roaming (hereinafter referred to as RM1).
In the second standby method, the PHS terminal is notified by the option information notification that the CS is a roaming CS regardless of the OS system, and when the PHS terminal receives the option information notification, the standby mode is set. This is a method of determining that it is possible and waiting (hereinafter referred to as RM2).
Therefore, in order to realize these two types of standby methods, 2
A pattern search method is required.

The RM1 is searched by determining the value of the system call code (hereinafter referred to as SYS-ID) assigned to each OS system, which is sent from the CS to the PHS terminal. On the other hand, the search for RM2 is performed from CS to PH.
This is performed by determining the information of the option information notification for each CS sent to the S terminal. RM1 search is SYS
-Since it only determines the value of ID, CS
In the same way as the search of, while the search time is short,
The search for the RM2 takes more time than the search for the RM2 because the option information notification is acquired and determined.

Next, an example of a conventional roaming method for a mobile terminal will be further described with reference to the flowchart of FIG. First, the PHS terminal pre-stores a unique SYS-ID assigned to the home OS system, requests a search for the home CS (step S21), and matches the above-mentioned home SYS-ID. It is determined whether or not there is a CS that is transmitting (step S22). If there is a CS sending the matching SYS-ID,
Since it is the home CS, the home CS is put in a standby state (step S23).

On the other hand, when there is no home CS, it is judged whether or not the SYS-ID of the CS of the OS system registered as a roaming OS system is registered (step S24), and if there is, the RM1 is searched (step S24). S25). At this time, regardless of the SYS-ID of RM-1, the SYS-IDs from all the CSs that can be received are received, and the SYS-ID that matches the SYS-ID of RM-1 is received therein.
-The CSs transmitting the IDs are arranged in descending order of the reception level, and when the highest reception level is equal to or higher than a predetermined level, the roaming CS transmitting the signal is put in a standby state (step S23). ).

However, if there is no CS transmitting the SYS-ID that matches the SYS-ID of RM-1,
Alternatively, if there is no CS that transmits a signal having a reception level equal to or higher than a predetermined level even if it matches the SYS-ID, it is determined whether the ID of the RM2 is registered (step S27).

If there is no registration, it is judged to be out of service (step S30). If there is registration, a CS search of the RM2 that receives the option information notification from the CS is performed (step S2).
8), it is determined whether there is a roaming CS based on the information in the option information notification (step S2).
9). If there is a roaming-capable CS, the CS is put in a standby state (step S23), and if there is no CS, it is determined to be out of range (step S30).

[0010]

However, conventionally, when the CS in the OS system of the home that can stand by is not found, the CS of the OS system capable of roaming is searched. Therefore, the search of RM1 is performed by the search of RM2. I try to give priority.

For this reason, when the PHS terminal is out of range due to radio interference or the like while waiting for the roaming-capable CS searched by the RM2, the PHS terminal immediately recovers,
The PHS terminal searches for the roaming-ready CS that has been waiting immediately before by the RM2 after performing the search operation of the RM1, and waits, and it takes a long time to transition from the out-of-range state to the standby state. Further, this causes a problem that the operating time of the software becomes long and the battery of the PHS terminal is consumed quickly.

The present invention has been made in view of the above points,
An object of the present invention is to provide a roaming method for a mobile terminal and a mobile terminal capable of shortening the standby time.

Another object of the present invention is to provide a roaming method for a mobile terminal and a mobile terminal capable of extending the battery life.

[0014]

In order to achieve the above object, the roaming method of the present invention is a system call in which a system detection code of a base station in a system registered as a roamable system is transmitted by the base station. The first standby method in which the mobile terminal waits for the base station when the code matches the code, and the mobile terminal is notified by the option information notification that the base station is a roaming-capable base station, and the mobile terminal notifies this option information. A roaming method for a mobile terminal that performs roaming by any of the second standby methods for receiving and receiving and waiting for
The first step of waiting for the base station searched by the standby method described above, and when the base station waiting for the first standby method cannot be searched, the base station searched by the second standby method is waited for A second step of registering a system call code of the station, and a base station to which the base station whose system call code is registered in the second step is to be awaited by the first standby method in the first step hereafter. It is characterized by doing.

In the present invention, the base station in which the system call code is registered in the second step is set as the target base station to be awaited by the first standby method in the first step hereafter. The base station which has been made to stand by by the method is subsequently searched by the first stand-by method to see if it is ready for stand-by.

In order to achieve the above object, the method of the present invention is such that when the waiting base station cannot be searched even if the waiting process according to the first step is performed a plurality of times,
It is characterized in that the standby process is performed in the second step. According to the present invention, since the base station capable of standby by the first standby method is searched a plurality of times, the base station capable of standby is searched by the second standby method. It is possible to make the number of times of searching for a base station capable of standing by by the first waiting method more than the number of times of searching for a base station capable of standing by by the second waiting method having a long search time.

Further, in order to achieve the above object, the method of the present invention comprises performing the first step on the base station transmitting the signal of the maximum reception level when there are a plurality of base stations searched by the first standby method. Wait for the second process
When there are a plurality of base stations searched by the second standby method, the step of (2) is waited for the base station transmitting the signal of the maximum reception level.

Further, in order to achieve the above object, in the mobile terminal of the present invention, the system detection code of the base station in the system registered as a roamable system matches the system call code transmitted by the base station. Roaming is performed by either the first standby method that sometimes waits for a base station or the second standby method that waits by receiving option information notification that the base station is a roaming-capable base station A mobile terminal that performs the system detection code assigned to each base station to be searched by the first standby method, and an ID assigned to each target base station to be searched by the second standby method.
Are stored in advance, a radio control means for receiving a signal transmitted from the base station, and a system detection code registered in the storage means in the reception result notified from the radio control means. Searching means for detecting whether there is a system detection code, and outputting base station information of the system detection code that matches the system detection code registered in the storage means, and the option information notification of the wireless control means. The data is analyzed using the ID registered in the storage means to search for a roamable base station, and when the roamable base station can be searched, the information of the roamable base station is output and stored. Data acquisition means for registering a system detection code of a roamable base station in the means, and detection of the base station by the first standby method for the search means. Commissioned to determine the waiting based on the information of the notified base station from the search unit, when the base station can not find to wait by the first standby method,
A control unit that requests the data acquisition unit to search for a base station by the second standby method, and determines standby based on the information of the roamable base station notified from the data acquisition unit, and the control unit determines standby. And a standby control means for waiting in the selected base station.

According to the present invention, the roaming-enabled base station, in which the system detection code is stored in the storage means by the data acquisition means, is set as the base station to be awaited by the first standby method. The base station that has made the standby by the second standby method can be searched thereafter by the first standby method as to whether or not the standby is possible.

In order to achieve the above object, in the mobile terminal of the present invention, the control means described above waits even if the control means makes a request for a base station search by the first waiting method to the search means a plurality of times. When a station cannot be searched,
The base station search request by the second standby method is made to the data acquisition means.

According to the present invention, the base station capable of standing by by the first stand-by method is searched a plurality of times, and then the second base station is searched.
Since the standby method is used to search for a base station that can stand by, the number of searches for a base station that can stand by using the first stand-by method with a short search time is compared with the number of times that the second stand-by method with a long search time stands by. It can be greater than the number of possible base station searches.

Further, in order to achieve the above-mentioned object, the mobile terminal of the present invention uses the search means for maximum reception when there are a plurality of base stations whose system detection code matches the system detection code registered in the storage means. The information of the base station of the level is notified to the control means as the information of the base station retrieved by the first standby method, and the data acquisition means is
When there is a plurality of roaming-capable base station information, the information of the maximum reception level roaming-capable base station is output to the control means, and the storage means registers the system detection code of the maximum reception level roamable base station. It is configured.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of a mobile terminal according to the present invention. As shown in the figure,
The mobile terminal according to this embodiment is, for example, a PHS terminal, and includes a control unit 1, a CS search unit 2, a data acquisition unit 3, a standby control unit 4, a wireless control unit 5, and hardware 6. The control unit 1 is a circuit unit that controls the operation until standby, and has a circuit unit having a determination function and a circuit unit having a storage function. The CS search unit 2 requests the wireless control unit 5 to search for a CS, determines the CSs that can be awaited among the CSs found in the search, and arranges them in descending order of reception level.
The CS having the highest reception level is determined as the CS capable of waiting and notified.

The data acquisition unit 3 has a function of having the wireless control unit 5 acquire the data necessary for waiting and notifying the control unit 1 of the data. The standby control unit 4 has a function of waiting for the accessed CS.
The wireless control unit 5 has a function of acquiring data using the hardware 6. The hardware 6 includes a wireless device or the like. Each of the above units 1 to 6 is operated by a power source from a battery (not shown).

Next, the roaming method of the present embodiment will be described with reference to FIG. 1 together with the flowchart for explaining the operation of the embodiment of the present invention of FIG. First, the control unit 1 performs a stand-by operation, and in order to perform a standby operation, a unique SYS-I assigned to the home OS system.
D is stored in advance, and the CS search unit 2 is requested to search for a CS (home CS) in the home OS system (see FIG. 2).
Step S1).

The CS search unit 2 notifies the wireless control unit 5 that the CS having the SYS-ID that matches the SYS-ID assigned to the home CS is searched, and the wireless control unit 5 thereby notifies the matching SYS. -Search whether or not there is a CS having an ID, and if so, notify the CS search unit 2 of the reception level and CS information, and if not, notify the CS search unit 2 to that effect. In order to wait for the CS having the highest reception level, the CS search unit 2 sorts the search results in the order of the highest reception level, and notifies the control unit 1 of the CS having the highest reception level. Further, when receiving the search result that there is no CS having the matching SYS-ID, the CS search unit 2 notifies the control unit 1 of that (see FIG.
Step S2).

Here, the SYS-ID is a code unique to the system and the business. Therefore, a CS whose SYS-ID does not match is a CS (including a roaming CS) having a different system and business, and is not a target of the home CS.

As a result of the search, if there is a CS having the highest reception level, the control unit 1 determines that CS is the home CS.
Then, a standby process is performed for the CS (step S14 in FIG. 2). If there is no search result, or if the CS cannot be accessed during the standby process (out of synchronization, etc.), the RM1ID registration is set in the control unit 1, or the RM2 is searched for C
It is determined whether or not the S standby state has been entered (step S3 in FIG. 2).

The control unit 1 determines whether or not to search the RM1 according to the setting of the mobile terminal. The control unit 1 has SYS-ID registration (a plurality of registrations are possible) for the search of RM1, or CS is searched by the search of RM2.
The SYS-ID of the CS determined to be valid in the search of the RM2 is registered in the control unit 1 in order to handle the same as the CS of the RM1 at that time since it has been in a standby state. If it is determined in step S3, the CS search of RM1 is performed (step S4 in FIG. 2).

In the CS search of RM1 in step S4, the control unit 1 requests the CS search unit 2 to perform a CS search of RM1 in order to search for RM1. In response to this request, the CS search unit 2 receives the C message regardless of the SYS-ID in the signal received from the CS in order to perform the CS search of the RM1.
The wireless controller 5 performs a CS search based on the S-ID.
To notify. Here, the CS-ID is a 42-bit signal transmitted from the CS through the control channel, and its upper 29
The bit is SYS-ID.

The radio control unit 5 notifies the CS search unit 2 of the search result (including the reception level). The CS search unit 2 registers the registered R in the search result notified from the wireless control unit 5.
If there is information on the CS whose SYS-ID and SYS-ID of M1 match, or if there is already stored information on the CS waiting for RM2, then there is information on the CS whose stored SYS-ID and SYS-ID match. In order to wait for the information of all CSs having the same SYS-ID to the CS having the highest reception level, the rearrangement is performed in the order of the highest reception level, and the control unit 1 is notified of the information of the CS having the highest reception level. To do. As a result, the control unit 1 determines that there is a valid CS (step S5 in FIG. 2), and waits for the CS having the highest reception level (step S14 in FIG. 2).

On the other hand, the CS search unit 2 judges whether the search result notified from the wireless control unit 5 is CS or not.
Exists, but the registered RM1 SYS-ID
Then, when it indicates that there is no matching CS in any of the SYS-IDs of the CSs waiting in the RM 2, the control unit 1 is notified to that effect. As a result, the control unit 1 determines that there is no valid CS (step S5 in FIG. 2) and determines whether or not the RM1 has been searched (step S6 in FIG. 2).

Further, when it is determined in step S3 that the control unit 1 has not registered the RM1ID and has not entered the CS standby state by the search of the RM2, it is determined whether the search of the RM1 is performed. Yes (Fig. 2
Step S6).

When the RM1 has been searched, the control unit 1 determines whether or not there is an unknown CS (see FIG. 2).
Step S7), if there is an unknown CS, it is determined whether there is RM2ID registration (step S8 in FIG. 2), and when it is determined in step S6 that RM1 is not searched, it is also determined whether RM2ID is registered. (Step S8 in FIG. 2). If it is determined in step S7 that there is no unknown CS, it is not necessary to search for RM2, and
Since it is understood that there is no CS of 2, it is determined to be out of range (step S12 in FIG. 2).

After step S8, processing is performed according to the determination of whether the RM2 is searchable or not. Whether to search the RM2 depends on the setting of the mobile terminal.
Will judge. Whether or not to search the RM2 is determined by whether or not the CS-ID of the CS that searches the RM2 is registered in the control unit 1 (step S in FIG. 2).
8). The control unit 1 is the C of the CS that searches the RM2.
When the S-ID is not registered, it is determined that it is out of range (step S12 in FIG. 2), and when it is registered, it is determined whether the search of the RM2 is valid (FIG. 2).
Step S9).

Here, since the search of RM2 is performed by acquiring the option information notification received from CS, the search time is longer than that of the search of RM1 and the battery consumption becomes severe. Moreover, even if the RM2 is searched for such a long time, it is unlikely that there is a CS found by the search. Therefore, in the present embodiment, the RM1 is searched 5 times and then the RM2 is searched 1 In step S9, it is determined whether or not the search for RM1 has already been performed five times before starting the search for RM2.
If it is done 5 times, it is judged that the search of RM2 is valid, and RM1 is searched.
If the number of times of search is less than 5, it is determined that the search of RM2 is not valid, and the standby state is set (step S14 in FIG. 2).

The battery consumption can be reduced by searching RM1 five times and then searching RM2 once. Further, for the CS that has once waited for the search of the RM2, the SYS-ID of the CS is registered in the control unit 1 so as to be searched when the search of the RM1 is performed, as will be described later. The CS RM2 search is guaranteed every time the RM1 is searched. Therefore, CS-ID of RM2
Is registered in the control section 1, and R is performed 5 times.
The CS search of RM2 is performed only when the search of M1 is performed (step S10 of FIG. 2).

In the CS search of RM2 in step S10,
The control unit 1 first notifies the data acquisition unit 3 that the RM 2 will be searched. Then, the data acquisition unit 3 notifies the wireless control unit 5 that the option information notification notified by the CS is acquired. With this notification, the wireless control unit 5 acquires the option information notification transmitted from the CS, and notifies the data acquisition unit 3 of the acquired option information notification. The data acquisition unit 3 analyzes the option information notification notified from the wireless control unit 5 using the ID of the RM 2.

As a result of the analysis, when the data acquisition unit 3 determines that the roaming is possible (step S in FIG. 2).
11), the SYS-ID of the CS is registered in the control unit 1 (step S13 in FIG. 2). If there are multiple roaming CSs, the S of the CS with the highest reception level
The YS-ID is registered in the control unit 1. After the above registration, the registered CS enters a standby state (step S14 in FIG. 2). As a result, the CS that has once been determined to be a roaming CS as a result of the search of the RM2 and is in the standby state has its SYS-ID registered in the control unit 1. Therefore, the CS is searched during the search of the RM1 in step S4. Will be done.

On the other hand, the data acquisition unit 3 analyzes the option information notification notified from the wireless control unit 5 using the ID of the RM 2, and as a result, when there is no roaming-capable CS, or the CS which has notified the option information notification. If is not found, notify the control unit 1 that there is no CS,
As a result, the control unit 1 determines that it is out of range (steps S11 and S12 in FIG. 2).

Thus, in this embodiment, once R
As a result of the M2 search, the SYS of the CS who has been waiting
-Since the ID is registered in the control unit 1 so that the CS can be searched at the time of searching the RM1 thereafter, PH
When the S terminal is on standby for the roaming-enabled CS searched by RM2 and immediately recovers after being out of range due to radio interference or the like, the PHS terminal uses the search operation of RM1 before searching for RM2. It is possible to search for the roaming-ready CS that has been waiting for a second time and wait for it, and it is possible to shorten the time until the transition from the out-of-range state to the waiting state as compared with the conventional case.

Further, since the search for RM2 is performed once for every five searches for RM1, the overall search time can be shortened, and thus the battery life can be extended.

The present invention is not limited to the above-described embodiment, and for example, one search of RM2 may be performed a plurality of times other than 5 as the number of searches of RM2. Of course.

[0044]

As described above, according to the present invention,
The base station that made the standby by the second standby method is
Since the first standby method is used to search whether or not the standby is possible, the standby time for the second standby method can be shortened, which allows the base station searched by the second standby method to change from the standby state. Out of range,
After that, the transition time when transitioning to the standby state can be shortened.

Further, according to the present invention, the number of times of searching for a base station capable of standing by by the first waiting method having a short searching time is calculated from the number of times of searching for a base station capable of waiting by the second waiting method having a long searching time. By also increasing,
Since the operation processing time of the software for standby is shortened as a whole, the consumption speed of the battery can be reduced and the life of the battery can be extended.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a device of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment of the method of the present invention.

FIG. 3 is a flowchart for explaining the operation of an example of a conventional method. It is a figure.

[Explanation of symbols]

1 control section 2 CS search section 3 Data acquisition section 4 Standby control unit 5 Wireless controller 6 hardware S1 to S14 processing steps of the method of the present invention

Continuation of the front page (56) Reference JP-A-6-188830 (JP, A) JP-A-9-65415 (JP, A) JP-A-10-117383 (JP, A) JP-A-7-154852 (JP , A) JP 2000-13846 (JP, A) JP 11-205342 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B 7/24-7/26 H04Q 7 / 00-7/38

Claims (6)

(57) [Claims] 1. A first standby method in which a mobile terminal waits for a base station when a system detection code of a base station in a system registered as a roamable system matches a system call code transmitted by the base station. And a second standby method of notifying a mobile terminal that the base station is a roaming-capable base station by option information notification, and the mobile terminal receiving this option information notification and judging that the mobile terminal is ready for standby A roaming method for a mobile terminal that performs roaming in, including a first step of waiting for a base station searched by the first standby method, and a step of not waiting for a base station waiting for the first standby method. , Waiting for the base station searched by the second waiting method, and displaying the system call code of the waiting base station. And a second step of recording, wherein the base station in which the system call code is registered in the second step is a base station to be awaited by the first standby method in the first step thereafter. A roaming method for a mobile terminal, comprising: 2. The mobile terminal according to claim 1, wherein the standby process according to the second step is performed when the standby base station cannot be searched even if the standby process according to the first step is performed a plurality of times. Roaming method. 3. In the first step, when there are a plurality of base stations searched by the first standby method, a process of waiting for a base station transmitting a signal of a maximum reception level is performed, and the second step is performed. The mobile terminal according to claim 1 or 2, wherein in the step, when there are a plurality of base stations searched by the second standby method, the base station that transmits a signal of the maximum reception level performs standby processing. Roaming method. 4. A first waiting method for waiting for a base station when a system detection code of a base station in a system registered as a roamable system matches a system call code transmitted by the base station, and a base. A mobile terminal that performs roaming by any of the second standby methods that waits by receiving option information notification that the station is a roaming-capable base station and judging that it is ready for standby. The system detection code respectively assigned to the base station to be searched, and the second
Storage means in which the IDs respectively assigned to the base stations to be searched by the standby method are stored in advance, wireless control means for receiving the signal transmitted from the base station, and notification from the wireless control means. It is detected whether or not there is a system detection code that matches the system detection code registered in the storage means in the received result, and a base of the system detection code that matches the system detection code registered in the storage means. Search means for outputting information of the station, the data of the option information notification notified from the wireless control means, using the ID registered in the storage means to search for roamable base stations, When the roamable base station can be searched, the information of the roamable base station is output and the roaming is possible in the storage means. Data acquisition means for registering a system detection code of a base station, requesting the search means to search for a base station by the first standby method, and waiting based on the information of the base station notified from the search means. When it is determined that the base station waiting by the first standby method cannot be searched, the data acquisition unit is requested to search for the base station by the second standby method, and the roaming notified from the data acquisition unit is requested. The system detection code is stored in the storage unit by the data acquisition unit, and has a control unit that determines standby based on information of possible base stations, and a standby control unit that waits in the base station whose standby is determined by the control unit. Wait for the base station that has been stored and is ready for roaming by the first standby method A mobile terminal, which is a target base station. 5. The control means uses the second standby method when a base station to be searched by the first standby method cannot be searched for by a plurality of times when the base station is searched for by the search means. The mobile terminal according to claim 4, wherein a search request for a base station is made to the data acquisition means. 6. The search means, when there are a plurality of base stations having a system detection code that matches the system detection code registered in the storage means, sends the information of the base station having the maximum reception level to the control means. The information is notified as the information of the base station searched by the standby method of No. 1, and when there is a plurality of the information of the base station capable of roaming, the data acquisition means notifies the control means of the information of the base station capable of roaming at the maximum reception level. The mobile terminal according to claim 4 or 5, wherein the system detection code of the base station capable of roaming at the maximum reception level is registered in the storage means while being output.