JPH11136736A - Mobile communication system, base station system, and mobile station system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize radio channels for a small zone system. SOLUTION: The system is provided with terminal 12(12-1-12-N) each of which makes position registration in a radio zone that satisfies a condition of allowing waiting among pluralities of radio zones 11(11-1-11-N) adopting a small zone system and ensuring a communication channel of a call generating in its own station and pluralities of base stations 13(13-1-13-N) each forming pluralities of radio zones 11 individually, setting a channel for an incident call to a terminal placed in the formed radio zone among the terminals 12 and providing the communication service. Each of pluralities of the base stations 13 has an out-zone promotion means 14 that monitors a probability where a call loss arises resulting from a deficiency in the radio channel and gives a command denoting tight/relaxed conditions allowing standby to each terminal where a completion call arises among the terminals 12 respectively when the probability is over/under a preset threshold level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-zone mobile communication system, and a base station and a mobile station constituting the mobile communication system.

[0002]

2. Description of the Related Art In recent years, mobile communication systems capable of providing communication services flexibly adapted to diversifying social and economic activities have become widespread.
Like the sonal Handyphone System (simplified telephone system), a large number of wireless base stations that form a tiny zone are concentrated in an area where many users are distributed. The number of digital cordless telephone system subscribers that can be used in the Internet is rapidly increasing.

FIG. 11 is a diagram showing a configuration example of a PHS. In the figure, radio base stations 90-1 to 90-N each have a minimum zone (hereinafter, simply referred to as "zone") 91-1.
~ 91-N and a digital inter-station transmission line 9
It is connected to the corresponding route of the exchange 93 via 2-1 to 92-N. The exchange 94 is connected to an existing telephone network.

[0004] A terminal (PT) 9 is provided in the zone 91-1.
4-1 is located. Further, the radio base station 90-1 includes an antenna 95-1 and an antenna interface 96-1 and a modem 97-1 cascade-connected between the antenna 95-1 and the inter-station transmission line 93-1. , TDMA control section 98-1 and line interface section 99-1, and these antenna interface section 9
6-1; a processor (C) connected to the modem 97-1; the TDMA controller 98-1; and the line interface 99-1.
PU) 100-1.

The configuration of the radio base stations 90-2 to 90-N is the same as the configuration of the radio base station 90-1.
In the following, the suffix numbers of the corresponding components are “2” to
The same reference numeral as “N” is assigned and shown, and illustration and description are omitted here. In the PHS having such a configuration, the terminal 94-1 moves from the outside to a point where the zone 91-1 and the zone 91-2 adjacent to the zone 91-1 overlap, or the supply of driving power starts. If it is attempted to enter the zone 91-1 by being performed, the link channel L to be applied to the link channel establishment phase
Among the CHs, a “link channel establishment request” is transmitted to the radio base station 90-1 via the uplink dedicated cell channel SCCH (FIG. 12 (1)).

In the radio base station 90-1, the TDMA controller 9
8-1 is an antenna 95-1, an antenna interface 96-1
Then, the above-mentioned “link channel establishment request” is received via the modem 97-1. When recognizing the "link channel establishment request", the processor 100-1 captures a vacant radio channel at that time, and sends the radio channel to the terminal 94-1 via the downlink dedicated cell channel SCCH. Is transmitted (including the identification information of the carrier and the time slot indicating the corresponding radio channel) (FIG. 12 (2)).

[0007] The source and destination of a message mutually transmitted and received by the radio base station 90-1 to and from the opposite terminal 94-1 via any channel are determined by TDM.
A control section 98-1 and antenna 95-1 and antenna interface section 96-1 operating under the control of the TDMA control section 98-1
And a processor 1 for controlling the operation with the modem 97-1
However, hereinafter, for simplicity, it will be described as "wireless base station 90-1" instead of the processor 100-1.

[0008] Upon receiving and recognizing the "link channel assignment", the terminal 94-1 wirelessly communicates via the downlink information channel TCH and the accompanying control channel FACCH among the service channels SCH to be applied in the communication phase. By cooperating with the base station 90-1 according to a predetermined procedure, synchronization is established ((3) in FIG. 12), and further, the "position" is sent to the radio base station 90-1 via the uplink incidental control channel FACCH. A "registration request" is sent (FIG. 12 (4)).

When receiving and recognizing the above-mentioned "location registration request", the radio base station 90-1 cooperates with the exchange 93 to authenticate the terminal 94-1 which is the transmission source of the "location registration request". And if the authenticity is confirmed under the authentication, the uplink and downlink incidental control channels FAC
The terminal 94-1 exchanges information necessary for accepting location registration with the terminal 94-1 via the CH (FIG. 12 (5)).

[0010] Such information includes (1) the recognition of location registration, (2) the secret key to be applied, and (3) the identification information of the "location registration area" identified by the terminal 94-1. , Etc. are included, but the details of these messages are irrelevant to the present invention, and thus description thereof is omitted here.

In the radio base station 90-1, the transmission source and the reception destination of the message exchanged with the exchange 93 via the inter-station transmission line 92-1 control the line interface unit 99-1. The processor 100-1 will be described below, but for the sake of simplicity, it will be described as "wireless base station 90-1" instead of the processor 100-1. further,
Upon receiving the identification information of the “location registration area”, the wireless base station 90-1 sends a “location registration area report” including the identification information to the exchange 93 via the inter-station transmission line 92-1. (FIG. 12 (6)).

The exchange 93 sends the identification information and the zone 91-1 (or the radio base station 90-1) to a home memory station (not shown) located above the exchange 93 via a predetermined signal link. The home memory station registers the combination of these pieces of identification information as "location registration information" in the home memory (FIG. 12 (7)).

Further, the exchange 93 refers to the office information or the home memory to obtain the identification information of all the zones adjacent to the zone indicated by the identification information included in the "location registration area report". The "location registration acceptance" including the identification information of (1) is given to the radio base station 90-1 (FIG. 12 (8)). The wireless base station 90-1 sends the "location registration accepted" to the terminal 94-1 via the associated control channel FACCH (FIG. 12 (9)).

The terminal 94-1 receives the "location registration accepted"
Each zone indicated by all the identification information included in the zone is identified as a zone adjacent to the zone in which the own station waits, and is used for selection of a migration destination candidate for location registration after handover or departure (see FIG. 12 (10)). )). Radio base station 90-1
Releases the link formed with the terminal 94-1 through the uplink and downlink incidental control channels FACCH based on a predetermined procedure (FIG. 12 (11)).

Thus, in the conventional example, zones 91-1 to 91-1
A terminal attempting to enter the zone in any of the zones 1-N automatically completes location registration as long as the terminal is a legitimate terminal and the radio base station forming the zone is operating normally, and The communication service can be provided by shifting to the standby state in which the outgoing and incoming calls can be awaited with high accuracy.

[0016]

By the way, in the above-mentioned conventional example, each of the radio base stations 90-1 to 90-N does not regulate the number of terminals entering the zone formed by itself. For example, if a zone is formed in a non-permanent event hall, etc., a call will be made to a terminal carried by many people who gather only during a specific period or time zone, and the number of wireless channels will be insufficient. In addition, there is a high possibility that the call service is not provided or the quality of the call service is significantly reduced.

In the PHS, generally, the radio base station 9
Since the number of radio frequencies allocated to 0-1 to 90-N is small, even if these radio channels are shared by three calls in parallel based on the TDMA scheme, as described above, a large number of In a zone where a call occurs in parallel with a terminal, the number of radio channels is absolutely insufficient, and the service quality may be significantly degraded.

According to the present invention, there is provided a mobile communication system in which the efficiency of use of a radio channel is enhanced while ensuring the compatibility of the procedure of processing related to existing call setup and call processing and the format of information transmitted / received via a radio transmission path. It is an object to provide a system, a base station device, and a mobile station device.

[0019]

FIG. 1 is a block diagram showing the principle of the present invention.

According to the first aspect of the present invention, location registration is performed in a wireless zone satisfying a condition in which standby is permitted among a plurality of wireless zones 11-1 to 11-N adapted to a small zone system, and A terminal 12 for securing a communication path for a call generated in a station.
-1 to 12-n and a plurality of wireless zones 11-1 to 11-N are individually formed, and the terminal 12-1 to 12-n is generated for a terminal located in the formed wireless zone. A plurality of base stations 13-1 to 13-N that perform channel setting of a call in cooperation with the terminal and provide a communication service are provided. Is monitored for the radio zone formed by the shortage of the radio channel, and among the terminals 12-1 to 12-n, the probability is increased for each terminal in which the completed call has occurred. It is characterized by having a departure promotion means 14 for giving commands indicating tightening and easing of a condition in which standby is permitted, respectively, when the value exceeds a preset threshold value and when the value falls below a preset threshold value.

According to a second aspect of the present invention, in the mobile communication system according to the first aspect, a plurality of base stations 13-1 to 13-1 are provided.
3-N obtains, based on the channel setting procedure, the identification information of the terminal that has exited from the wireless zone formed by the terminal 12-1 to 12-n at the end of the call based on the channel setting procedure. Outgoing terminal storage means 21 which holds the identification information of the terminal only during a period in which the probability of occurrence of a call loss monitored by the terminal exceeds a predetermined threshold, and the terminal 12-1 to 12-n, The identification information of the terminal attempting location registration with respect to the wireless zone formed by the station is obtained based on the channel setting procedure, and it is determined whether or not the identification information is stored in the outgoing terminal storage unit 21. In addition, a reentry block means 22 for restricting the location registration when the result of the determination is true is provided.

According to a third aspect of the present invention, there is provided the mobile communication system according to the first or second aspect,
-1 to 12-n indicate a visiting zone which holds zone identification information indicating a wireless zone of a wireless zone which has gone out because a command to tighten the conditions under which standby is permitted has been given by the going out promotion unit 14. It has a recording unit 31 and, among the plurality of wireless zones 11-1 to 11-N, a specific zone indicated by the zone identification information held by the traveling zone recording unit 31 from a wireless zone in which location registration trial is permitted. It is characterized by including means for excluding the wireless zone and setting the remaining wireless zones as candidates to be subjected to the location registration attempt.

According to a fourth aspect of the present invention, there is provided the mobile communication system according to the first or second aspect,
-1 to 12-n indicate a visiting zone which holds zone identification information indicating a wireless zone of a wireless zone which has gone out because a command to tighten the conditions under which standby is permitted has been given by the going out promotion unit 14. A candidate wireless zone which has a recording unit 31 and in which a location registration attempt is permitted among a plurality of wireless zones 11-1 to 11-N is indicated by the zone identification information held by the visited zone recording unit 31. A means for determining whether or not a specific wireless zone is included, and, when the result of this determination is true, giving priority to a candidate wireless zone other than the specific wireless zone to perform this location registration trial. It is characterized by including.

According to a fifth aspect of the present invention, in the mobile communication system according to any one of the first to fourth aspects, the departure promotion means 14 performs the channel setting procedure and the channel setting process. It is characterized in that a command for tightening and relaxing conditions under which waiting is permitted while maintaining compatibility with respect to the format of a message to be exchanged with the terminals 12-1 to 12-n is provided.

FIG. 2 is a block diagram showing the principle of the present invention. According to a sixth aspect of the present invention, a wireless zone 40 adapted to the small zone system is formed, and for a terminal located in the wireless zone 40, a channel setting of an originated call is performed in cooperation with the terminal, and a communication service is provided. And a channel setting means 41 for providing the wireless zone 40, and monitors the probability of occurrence of a call loss due to the shortage of the wireless channel. When the probability exceeds a preset threshold value and when the probability falls below a preset threshold value, a service area promotion means 42 for giving commands indicating tightening and relaxation of a condition in which standby is permitted is provided.

According to a seventh aspect of the present invention, in the base station apparatus according to the sixth aspect of the present invention, of the terminals that have completed calls in the wireless zone 40, the terminals that exit from the wireless zone 40 when the call is terminated are identified. A leaving terminal that acquires information based on a channel setting procedure and retains the identification information of the terminal only during a period in which the probability of occurrence of a call loss monitored by the leaving service promotion means 42 exceeds a predetermined threshold. The storage unit 51 obtains identification information of a terminal that attempts location registration with the wireless zone 40 based on a channel setting procedure, and determines whether the identification information is stored in the outgoing terminal storage unit 51. And the re-entry block means 52 for restricting the location registration when the result of the determination is true.

FIG. 3 is a block diagram showing the principle of the present invention. The invention according to claim 8 is a position registration unit 61 that performs position registration in a wireless zone that satisfies a condition in which standby is permitted, among a plurality of wireless zones 11-1 to 11-N adapted to the small zone method, Multiple wireless zones 1
Channel control means 6 for setting a channel and securing a communication channel for a call generated in a wireless zone in which location registration has been completed by location registration means 61 among 1-1 to 11-N.
2. The channel control means 62 updates the condition for which the standby should be allowed for the completed call generated in the own station according to the tightening command and the relaxation command given through the secured communication path. Then, the service is performed based on the updated condition.

According to a ninth aspect of the present invention, in the mobile station apparatus according to the eighth aspect, zone identification information indicating a wireless zone that has been set out at the end of the call in response to an instruction to tighten the conditions under which standby is permitted is provided. The location registering unit 61 includes a plurality of wireless zones 11-1 to
Of the 11-N, a specific wireless zone indicated by the zone identification information held by the visited zone recording unit 71 is excluded from wireless zones satisfying the conditions under which the location registration attempt is allowed, and the remaining wireless zones are It is characterized in that it is a candidate to be subjected to location registration trial.

[0029] According to a tenth aspect of the present invention, in the mobile station device according to the eighth aspect, zone identification information indicating a wireless zone that has been out of service at the end of the call in response to a tightening instruction of a condition in which standby is permitted. Outgoing zone recording means 71 to be retained
And the position registration means 61 includes a plurality of wireless zones 11-1.
Among the candidate wireless zones satisfying the condition that the location registration attempt is permitted, whether the specific wireless zone indicated by the zone identification information held by the visited zone recording unit 71 is included or not. It is characterized in that, when the result of this determination is true, a trial of position registration is performed with priority given to a candidate wireless zone other than the specific wireless zone.

In the mobile communication system according to the first aspect of the present invention, the terminals 12-1 to 12-n are allowed to stand by among the plurality of wireless zones 11-1 to 11-N adapted to the small zone system. Registration in a wireless zone that satisfies the conditions to be satisfied. The plurality of base stations 13-1 to 13-N individually form these wireless zones 11-1 to 11-N, and
Of the terminals 12 to 12-n, the channel setting of the generated call is performed in cooperation with the terminal located in the formed wireless zone, and the communication service is provided. In addition, the terminals 12-1 to 12-n secure a communication path of a call generated in the own station by cooperating in this way.

The outgoing area promotion means 14 provided in each of the base stations 13-1 to 13-N monitors the probability of occurrence of a call loss due to a shortage of radio channels in a radio zone formed by the own station. Of the terminals 12-1 to 12-n, for each terminal on which a completed call has occurred, when the probability exceeds a predetermined threshold value and when the probability falls below a predetermined threshold value, Commands indicating tightening and relaxation are given, respectively.

That is, a plurality of wireless zones 11-1 to 11-11
-N falls into a congestion state individually, or if it is likely to fall, the terminal where the completed call has occurred in the wireless zone,
In response to a command indicating tightening of the above-described conditions, it is possible to temporarily go out of service with the end of the call and to newly perform location registration.
Accordingly, for the plurality of wireless zones 11-1 to 11-N, the possibility of falling into a congestion state due to the fact that it is not restricted that too many terminals enter the area is reduced, and the congestion state is reduced. It is easy to get out of the market.

[0033] In the mobile communication system according to the second aspect of the present invention, in the mobile communication system according to the first aspect, the outgoing terminal storage means 21 stores one of the terminals 12-1 to 12-n. Acquires the identification information of the terminal that went out of the wireless zone to be formed at the end of the call based on the channel setting procedure,
The identification information of the terminal is retained only during a period in which the probability of occurrence of a call loss monitored by the service area promotion means 14 exceeds a predetermined threshold. The re-entry zone prevention means 22
Among the 2-1 to 12-n, the identification information of the terminal that attempts location registration with respect to the wireless zone formed by the own station is obtained based on the channel setting procedure, and the identification information is stored in the outgoing terminal storage unit 21. It is determined whether or not it is held in the. Further, when the result of the determination is true, the re-entry area prevention means 22 regulates the corresponding location registration.

That is, in response to a command indicating tightening of a condition in which standby is permitted, a terminal that has gone out of service with the end of the call is prevented from entering the same wireless zone again, so that the mobile communication according to claim 1 is performed. Compared with the system, the possibility of falling into a congested state and the smooth departure from the congested state can be more accurately achieved. In the mobile communication system according to the third aspect, in the mobile communication system according to the first or second aspect, the terminals 12-1 to 12-n
The service zone recording means 31 provided in the device, when the vehicle leaves the area because the tightening instruction of the condition that the standby is permitted is given by the service promotion means 14, adds the zone identification information indicating the corresponding wireless zone. Hold. Further, the terminals 12-1 to 12-n set the specific wireless zone indicated by the zone identification information held by the service zone recording unit 31 as described above among the wireless zones in which the location registration attempt is permitted. Excluded and the remaining wireless zones are candidates for which location registration attempts should be made.

That is, the terminals 12-1 to 12-n voluntarily instruct the terminal 12-1 to 12-n to enter the same wireless zone again after exiting the service together with the end of the call in response to the instruction indicating tightening of the condition in which the standby is permitted. Withhold. Therefore, for the plurality of wireless zones 11-1 to 11-N, the base stations 13-1 to 13-N
As in the mobile communication system according to the second aspect, the likelihood of falling into a congestion state and the smooth departure from the congestion state can be increased with high accuracy without increasing the processing amount.

In the mobile communication system according to the fourth aspect of the present invention, in the mobile communication system according to the first or second aspect, the service zone recording means 31 provided in the terminals 12-1 to 12-n. Holds the zone identification information indicating the applicable wireless zone when the device goes out of service because the tightening instruction of the condition that the standby is permitted is given by the service going out promotion means 14. Further, the terminals 12-1 to 12-1
-n indicates a specific wireless zone indicated by the zone identification information held by the visited zone recording unit 31 for a candidate wireless zone in which location registration trials are allowed among a plurality of wireless zones 11-1 to 11-N. It is determined whether or not a zone is included, and when the result of this determination is true, a trial of this location registration is performed with priority given to a candidate wireless zone other than the specific wireless zone.

That is, after the terminals 12-1 to 12-n go out with the end of the call in response to the command indicating the tightening of the condition in which the standby is allowed, as long as there is another wireless zone that can enter the area, Do not enter the same wireless zone. Therefore,
The terminals 12-1 to 12-n can receive the communication service while flexibly adapting to the traffic distribution and the zone configuration in each wireless zone, as compared with the mobile communication system according to the third aspect. .

According to a fifth aspect of the present invention, in the mobile communication system according to any one of the first to fourth aspects, the departure promotion means 14 is provided.
Tightening and relaxing conditions for allowing standby while maintaining compatibility with respect to the channel setting procedure and the format of messages to be exchanged with the terminals 12-1 to 12-n in the channel setting process. Give the order of.

Therefore, the present invention can be applied to an existing mobile communication system as long as it conforms to the above-described channel setting procedure and message format. In the base station apparatus according to the sixth aspect of the present invention, the channel setting means 41 forms a wireless zone 40 adapted to the small zone system, and performs channel setting of a generated call for a terminal located in the wireless zone 40. The communication is performed in cooperation with the terminal and the communication service is provided. The outgoing service promotion means 42 monitors the probability of occurrence of a call loss due to the shortage of the wireless channel in the wireless zone 40, and the probability that the individual terminal in which a completed call has occurred in the wireless zone 40 is determined in advance. When the value exceeds the set threshold value and when the value falls below the set threshold value, commands indicating tightening and relaxation of the condition in which the standby is permitted are given.

That is, when the radio zone 40 is in a congestion state or is likely to be in a congestion state, the terminal in which the completion call has occurred in the radio zone 40 ends the call in response to the instruction indicating the tightening of the above conditions. Together with the location, and new location registration can be performed. Therefore, in the wireless zone 40, the possibility of falling into a congested state due to the fact that each terminal is not restricted from entering an excessively large number of terminals is reduced, and smooth departure from the congested state is not achieved. It is.

In the base station apparatus according to the seventh aspect of the present invention, the outgoing terminal storage means 51 stores, among the terminals in which the completed call has occurred in the wireless zone 40, the terminal that has come out of the wireless zone 40 when the call is terminated. Is obtained based on the channel setting procedure, and the identification information of the terminal is held only for a period in which the probability of occurrence of a call loss monitored by the service area promotion means 42 exceeds a predetermined threshold. The re-entry block unit 52 acquires the identification information of the terminal attempting to register the location with the wireless zone 40 based on the channel setting procedure,
It is determined whether or not the identification information is stored in the service terminal storage means 51. In addition, the re-entry block means 52
When the result of the determination is true, the corresponding position registration is restricted.

That is, in response to a command indicating tightening of a condition in which standby is permitted, a terminal that has exited with the end of the call is prevented from entering the same wireless zone again, so that the base station according to claim 6 is provided. Compared with the device, the possibility of falling into a congestion state is reduced and the escape from the congestion state is smoothly performed.

[0043] In the mobile station apparatus according to the eighth aspect of the present invention, the location registering means 61 determines a condition in which a standby is allowed among a plurality of wireless zones 11-1 to 11-N adapted to the small zone system. Perform location registration in the wireless zone that meets the requirements. The channel control means 62 includes a plurality of wireless zones 11-1 to 11-N
Among them, the channel setting is performed and the communication path is secured for the call generated in the wireless zone where the position registration is completed by the position registration means 61. Further, the channel control means 62 updates the condition for which the standby should be allowed in response to the tightening command and the mitigation command given through the secured communication path for the completed call generated in the own station, Departure is performed based on the updated conditions.

That is, when the radio zone in which the local station is located is in a congested state or is likely to fall, the mobile station apparatus in which the completed call has occurred in the radio zone indicates that the above-described condition is tightened. It is possible to temporarily go out of service with the end of the call in response to the command, and to newly perform location registration. Therefore, for each wireless zone, the possibility of entering a congestion state due to the fact that too many mobile station apparatuses are not restricted from entering is reduced, and smooth departure from the congestion state is achieved. Is peeled off.

In the mobile station apparatus according to the ninth aspect of the present invention, in the mobile station apparatus according to the eighth aspect, the service zone recording means 71 terminates in response to a tightening command of a condition in which standby is permitted. Holds zone identification information indicating a wireless zone that has gone out of service at the time of talking. The location registration unit 61 uses the zone identification information held by the outbound zone recording unit 71 among the plurality of wireless zones 11-1 to 11-N, out of the wireless zones that satisfy the conditions under which the location registration attempt is permitted. Exclude the particular wireless zone shown and make the remaining wireless zones candidates for which location registration attempts should be made.

That is, the mobile station apparatus according to the present invention spontaneously instructs to return to the same wireless zone again after exiting with the end of the call in response to a command indicating tightening of the condition in which standby is permitted. Withhold. Therefore, the mobile station apparatus according to claim 8, for a plurality of wireless zones 11-1 to 11 -N, without increasing the processing amount of a base station forming these wireless zones 11-1 to 11 -N. In the same manner as described above, it is possible to reduce the possibility of falling into the congestion state and to smoothly escape from the congestion state.

According to a tenth aspect of the present invention, there is provided a mobile station apparatus according to the eighth aspect, wherein:
The outbound zone recording means 71 holds zone identification information indicating the wireless zone that has been out of service at the end of the call in response to a tightening command of a condition under which standby is permitted. Location registration means 61
Is a specific wireless zone among the plurality of wireless zones 11-1 to 11-N, which is indicated by the zone identification information held by the visited zone recording unit 71, for a candidate wireless zone satisfying the condition that the location registration attempt is permitted. It is determined whether or not a wireless zone is included. Further, when the result of this determination is true, the position registration means 61 gives priority to a candidate wireless zone other than the above-described specific wireless zone and attempts to register the position.

That is, after the terminal according to the present invention goes out with the end of a call in response to a command indicating tightening of a condition in which the standby is permitted, as long as there is another wireless zone which can enter the same area, the same wireless zone Do not enter the area. Therefore, the terminal according to the present invention can receive the communication service while flexibly adapting to the zone configuration and the traffic distribution in each wireless zone, as compared with the mobile station device according to the ninth aspect.

[0049]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG.
FIG. 2 is a diagram showing an embodiment corresponding to the invention described in FIG. In the drawing, the difference from the conventional example shown in FIG. 11 is that the radio base stations 80-1 to 80-8 are used instead of the radio base stations 90-1 to 90-N.
0-N, an exchange 81 in place of the exchange 93, and a terminal (PT) 82-1 in place of the terminal 94-1.

The difference between the configurations of the radio base stations 80-1 to 80-N and the radio base stations 90-1 to 90-N is that the processor 83-1 replaces the processors 100-1 to 100-N, respectively. ~
83-N is provided. In addition, this embodiment and FIG.
3 with respect to the block diagram shown in FIG. 3, zones 91-1 to 91-N correspond to the wireless zone 11,
-1 corresponds to the terminal 12, service zone recording means 31, 71, location registration means 61, and channel control means 62, and the radio base stations 80-1 to 80-N and the exchange 81 correspond to the base station 13-1.
13-N, and the processors 53-1 to 53-N correspond to the outgoing service promotion means 14 and 42, the outgoing service terminal storage means 21 and 51, the re-entry service preventing means 22 and 52, and the channel setting means 41. .

FIG. 5 is a diagram for explaining the operation of the present embodiment corresponding to the first, fifth, sixth, and eighth aspects of the present invention. In the figure, the steps of channel setting performed in the same manner as in the conventional example are denoted by the same reference numerals as those shown in FIG. 12, and the description thereof is omitted here. FIG. 6 is an operation flowchart of the present embodiment corresponding to the first, second, fifth, and eighth aspects of the present invention.

Hereinafter, referring to FIG. 4 to FIG.
The operation of the present embodiment corresponding to the inventions described in 5, 6, and 8 will be described. The exchange 81 determines, for the zones 91-1 to 91-N, the number of individually vacant radio channels (here, it is assumed that it is given in advance as station information), the number of terminals whose location registration has already been completed, and the number of calls. Monitor the volume and part or all of the distribution of call volume, and based on the results of the monitoring,
It is determined whether the state is a “congestion state” or “a state where the possibility of becoming a congestion state exceeds an allowable limit” (FIG. 5).
(a)). In the following, such a state is referred to as “exiting promotion state”, and a zone falling into the “exiting promotion state” is referred to as “congestion zone”.

In the exchange 81, the terminal 82-1 located in the zone 91-1 is connected to the (radio base station 80-1, the inter-station transmission line 92-1).
In the process of transitioning to a call state in which a call signal is transmitted / received to / from any terminal (not shown) accommodated in the telephone network (via -1 and the exchange 81) and the call state, the zone 91- The determination result obtained as described above for 1 is notified to the wireless base station 80-1 as "zone information" (FIG. 5 (b)).

In the radio base station 80-1, the processor 83-1
Upon recognizing that the result of the above-described determination is true in response to the notification,
A value larger than a prescribed value (hereinafter, this value is referred to as a “temporary holding level”) is applied as the value of the “standby zone holding level” (FIGS. 5C and 6A). Further, as shown in FIG. 7, the processor 83-1 transmits an associated control channel FACCH to the terminal 82-1 in order to realize functions such as selection of a wireless zone and setting / maintenance / switching / disconnection of a wireless line.
The "temporary holding level" described above as the "standby zone holding level" is added to the "area information (function request response)" to be transmitted via the "(area) (FIG. 5 (d)", FIG. 6 (2)).

The "standby zone holding level" described above is similarly transmitted at a predetermined frequency via the associated control channel FACCH as long as the corresponding completed call remains, but the "going out promotion state" is resolved. In this case, the processor 83-1 appropriately updates the value to the prescribed value described above (FIGS. 6 (3) and (4)). However, since the operation of each unit in that case is the same as that of the conventional example and is not a feature of the present invention, the description thereof will be omitted below.

On the other hand, as described above, the terminal 82-1 fetches and holds the "standby zone holding level" given as "area information" by the radio base station 80-1. By comparing the “standby zone holding level” with the electric field strength of the received wave arriving at the own station from the wireless base station 80-1, it is determined whether or not the standby state should be continued in the zone 91-1.

Therefore, when the “standby zone holding level” is the “temporary holding level” described above, the terminal 82-1 is not actually located outside the zone 91-1. Actively go out of the zone 91-1 and perform location registration. In such a location registration process, the terminal 82
-1 is a zone in which the electric field strength of the received wave arriving at the own station is the maximum among the zone 91-1 and the zone adjacent to the zone 91-1 (here, the zone 91-1 is different from the zone 91-1 for simplicity). In the case of trying to enter the zone 91-2), as in the conventional example, "link channel establishment" is sent to the radio base station 80-2 via the uplink dedicated cell channel SCCH. Request ”(FIG. 5 (1)). In the following, a zone adjacent to a zone in which a call is made is simply referred to as an “adjacent zone”.

In the radio base station 80-2, the processor 83-2
When receiving and recognizing the "link channel establishment request", the terminal 82 captures the vacant radio channel at that time and transmits the terminal 82 via the downlink dedicated cell channel SCCH.
As shown in FIG. 8, a carrier and a time slot indicating a corresponding radio channel are added to “notification information reception instruction” indicated by a logical value (= 1) of bit 3 indicating an extended LCH protocol type. (Link channel assignment) including the numbers (FIG. 5 (e) and FIG. 6 (5)).

Upon receiving and recognizing the “link channel assignment”, terminal 82-1 receives service channel SCH.
Of the downlink information channel TCH and the accompanying control channel F
After establishing synchronization by linking with the radio base station 80-2 via the ACCH (FIG. 5 (3)), the radio base station 80-2 is addressed to the radio base station 80-2 via the uplink incidental control channel FACCH.
A "location registration request" is transmitted (FIG. 5 (4)).

Further, the terminal 82-1 determines whether or not the above-mentioned "notification information receiving instruction" has been received. If the result of the determination is false, the terminal 82-1 proceeds to the same procedure as in the conventional example. Perform location registration based on the location. However, when the result of the determination is true, the terminal 82-1 transmits the radio base station 8 via the uplink incidental control channel FACCH as shown in FIG.
A "definition information request" is sent to address 0-2 (FIG. 5 (f)).

In the radio base station 80-2, the processor 83-2
Are the "location registration request" and "definition information request" described above.
When receiving and recognizing the “standby zone holding level”, the terminal 82-1 is addressed to the terminal 82-1 via the associated control channel FACCH or SACCH as shown in FIG. 7 or FIG.
Is transmitted as a "definition information response" (FIG. 5 (g), FIG. 6).
(6)).

Further, the processor 83-2 applies the “temporary holding level” included in the “definition information response” as the “standby zone holding level”, and cooperates with the exchange 81 in the same manner as in the conventional example. When the authenticity is confirmed by the authentication and the authenticity is confirmed under the authentication, the terminal 82-1 and the terminal 82-1 mutually receive the location registration based on a predetermined procedure via the uplink and downlink incidental control channels FACCH. The necessary information is transmitted and received (FIG. 5 (5)).

Further, the terminal 82-1, the radio base station 80-2, and the exchange 81 perform the same procedure as in the conventional example (FIG. 5).
Channel settings related to location registration are performed based on (6) to (11)). As described above, according to the present embodiment, a terminal that has made a call in the congestion zone immediately goes out of service and registers its location when the call ends. That is, in the congestion zone, if the transmission quality to be obtained in the adjacent zone is higher than the transmission quality of the congestion zone, the departure from the out-of-service promotion state (congestion state) is promoted, and the user has already entered the service area. The possibility that the provision of the service to other terminals will be hindered due to the shortage of the wireless channel is surely reduced.

Hereinafter, referring to FIGS. 4 to 6, claims 2 and 7 will be described.
The operation of the present embodiment corresponding to the invention described in (1) will be described.
In the radio base stations 80-1 to 80-N, the processors 83-1 to 8-3
3-N has a terminal number table (not shown) corresponding to each of the wireless zones 91-1 to 91-N in the main memory.

Further, when any completed call occurs in an individual wireless zone formed by the own station, the processors 83-1 to 83-N determine whether or not this wireless zone is in a service promotion state (FIG. 6 (a)), if the result of the determination is false, all the contents of the terminal number table corresponding to the wireless zone for which such a result was obtained are erased from the terminal number table described above (see FIG. 6 (b)) and the wireless zone 91-1 in which the corresponding result is obtained is subjected to the processing based on the same procedure as the embodiment corresponding to the invention according to claims 1, 5, 6, and 8.

However, if the result of the above determination is true, the processor 83-1 determines that the terminal at which the above-mentioned completed call has occurred (here, for the sake of simplicity, it is assumed that the terminal is indicated by the code "82-1"). Is stored in the terminal number table (FIG. 6 (c)). Further, the processors 83-1 to 83-N include:
When the aforementioned “location registration request” is received from any terminal in each of the wireless zones 91-1 to 91-N, the terminal number included in the “location registration request” corresponds to the terminal number table corresponding to the corresponding wireless zone. It is determined whether or not the information has been registered (FIG. 6 (d)).

Further, if the result of the determination is false, the processors 83-1 to 83-N determine whether the
The process is continued based on the same procedure as that of the embodiment corresponding to the invention described in FIG. However, if the result of the determination is true, the processors 83-1 to 83-N interrupt the position registration process performed in response to the above-described "position registration request" (FIG. 6 (e)). .

That is, for a zone that has entered the out-of-service promotion state, as long as the out-of-service promotion state is not canceled, it is surely restricted that a terminal once out of the zone will re-enter the service at the end of the call. Since the terminal positively enters the adjacent zone, the terminal can be more reliably departed from the out-of-service promotion state as compared with the embodiment according to the first, fifth, sixth and eighth aspects of the present invention.

In the present embodiment, it is regulated that the terminal 82-1 having once exited the congestion zone enters the same congestion zone again and shifts to the standby state. If increasing base station traffic (including location registration calls) is allowed, no such restriction may be imposed. FIG.
10 is an operation flowchart of the present embodiment corresponding to the inventions described in 9 and 10.

The operation of this embodiment according to the third and ninth aspects of the present invention will be described below with reference to FIGS. The difference between this embodiment and the embodiment corresponding to the invention described in claims 1, 2, 5 to 8 lies in the following processing procedure performed by the terminal 82-1. If the terminal 82-1 goes out due to the "standby zone holding level" being set to the "temporary holding level" described above, the zone indicating the zone in which the call was made earlier The identification information is stored (FIG. 10A).

Further, terminal 82-1 measures the electric field strength of the received wave arriving at its own station, and determines a zone whose electric field strength exceeds a predetermined standby zone selection level as a "candidate of a zone which can enter". The electric field strengths are selected in descending order (FIG. 10 (2)). Further, the terminal 82-1 determines whether or not the above-described zone identification information is stored. If the determination result is false, the terminal 82-1 is included in the “candidate zone that can be entered”. Then, a trial of position registration is performed with priority given to a candidate having a large electric field strength of the received wave (FIG. 10 (3)).

However, if the result of the determination is true, the terminal 82-1 excludes the candidate indicated by the zone identification information from the above-mentioned “candidate zones that can enter the area”, and Among the candidates, the position registration is performed with priority given to the candidate having the higher electric field strength of the received wave (FIG. 10 (4)). As described above, according to the present embodiment, the radio base stations 80-1 to 80-N and the exchange 81 in the embodiment corresponding to the second and seventh aspects of the present invention.
The processing performed in steps (1) and (2) is load-balanced by the individual terminals.

Therefore, while the processing amount of the radio base stations 80-1 to 80-N and the exchange 81 is reduced, the zone 91 is set in the same manner as in the embodiment according to the second and seventh aspects of the present invention.
-1 to 91-N will be able to escape from the promotion status. Hereinafter, the operation of the present embodiment corresponding to the invention described in claims 4 and 10 will be described with reference to FIGS. 4 and 7 to 10.

The difference between the present embodiment and the embodiments according to the third and ninth aspects is that, as described later, the terminal 82-1 uses the above-mentioned “candidate zone candidate”. Confirm,
The procedure for assigning a priority to the determined “candidate zone that can be entered” is in the procedure. If the terminal 82-1 goes out of service due to the “standby zone holding level” being set to the “temporary holding level” as described above, the terminal 82-1 may claim the terminal 82-1.
In the same manner as in the embodiment corresponding to the invention described in (1), the zone identification information is stored (FIG. 10 (1)), and "candidates of zones which can enter the area" are selected (FIG. 10 (2)).

The terminal 82-1 determines whether or not the above-mentioned zone identification information is stored. If the result of the determination is false, the above-mentioned “candidate zone that can be entered” is used. Of the received waves, priority is given to the candidate having the large electric field strength of the received wave (FIG. 10 (3)). However, when the result of the determination is true, the terminal 82-1 determines, for the candidate indicated by the zone identification information among the above-mentioned “candidate zones that can be entered”, the measured reception wave. Regardless of the electric field strength, it is not excluded and the priority is set to the lowest.

Further, the terminal 82-1 performs the position registration with priority given to the candidate having the higher electric field strength of the received wave among the determined candidates (FIG. 10 (a)). That is, according to the present embodiment, there is no adjacent zone that can be a “candidate of a zone that can enter the zone”, or even if there is such an adjacent zone, the location registration for all of these adjacent zones causes some cause ( For example, even if a failure has occurred or the vehicle has fallen into the “progress in the state of being out of service”, it is permissible to re-enter the zone once it has been out of the service area. The service quality is improved as compared with the embodiments corresponding to the inventions described in 3, 5 to 9.

In the embodiments corresponding to the third, fourth, ninth, and tenth aspects of the present invention, there is no indication of the activation factor of “the process of invalidating the zone identification information stored by each terminal”. Although the activation factor is not necessarily obtained, if it is surely obtained, a predetermined time period (for example, a time period required for canceling the corresponding out-of-service promotion state) is measured under the timing performed by the terminal alone. Is passed from the radio base stations 80-1 to 80-N (for example, transmitted via the broadcast channel BCCH or the common channel CCCH), and a state indicating whether or not the mobile station is in the out-of-service promotion state. It may be at the time when it is recognized that the departure promotion state has been canceled based on the information or at any other time.

In the embodiments corresponding to the third, fourth, ninth, and tenth aspects of the present invention, the electric field strength of the received wave arriving at the terminal 82-1 among the “candidates for zones that can enter” is determined. Candidates for which location registration trials are to be performed are selected in descending order.For example, the number of zones that can enter the area by any of the number of identification information of the mobile station device, the number of assigned color codes, and random numbers Similar candidates may be selected based on the remainder obtained by the division.

Further, in each of the above embodiments, the PHS
Claims 1 to 9 by changing these procedures and formats while ensuring compatibility with the channel setting procedures and the format of control information provided for the channel settings.
However, if such compatibility is not required, these inventions can be applied to a multiple access system, a channel setting procedure, a radio channel if the mobile communication system is a small zone system. The present invention is applicable to mobile communication systems other than the PHS regardless of the arrangement of the PHS.

In each of the above embodiments, the interface with the telephone network is established by the exchange 81, and the wireless zones are formed by the wireless base stations 80-1 to 80-N connected to the exchange 81. However, for example, a private mobile communication system that does not require connection with such a telephone network, or these exchanges 81 and wireless stations 80-1 to 80-80.
The inventions according to claims 1 to 10 are also applicable to a mobile communication system having a device configuration in which -N is merged.

In each of the above embodiments, the wireless zone 91
-1 to 91-N are out-of-service promotion states for radio base stations 80-1 to 80
-N and the exchange 81 are determined, but if deterioration in accuracy, responsiveness, etc. is permitted, for example, the radio base stations 80-1 to 80-N or the exchange 81 alone may be used. By performing the same determination individually, load distribution and function distribution adapted to the configuration of the system may be achieved.

In each of the above-described embodiments, when it is recognized that “the electric field strength of the received wave at the time of ending the call has fallen below the provisional holding level” based on the channel setting procedure performed by the terminal 82-1, The location registration has been started under the initiative of the terminal 82-1. Such an activation factor of the location registration is detected in the process of the signal determination, the degree of the code interference, instead of the electric field strength of the received wave. Any of the error in the signal space to be performed, the number and frequency of error bits based on the error correction coding method, and the prediction of the time of service performed by identifying the moving path of the mobile station may be applied.

[0083]

As described above, according to the first, sixth, and eighth aspects of the present invention, each wireless zone enters a congestion state due to the fact that it is not restricted that too many terminals enter the area. The possibility of falling is reduced, and the escape from the congested state is facilitated. Further, in the inventions according to Claims 2 and 7, the possibility of falling into a congestion state is reduced, and the smoothness of departure from the congestion state is higher than in the inventions according to Claims 1 and 6. Peel off.

Further, according to the third and ninth aspects of the present invention,
Without increasing the processing amount of the base station, in the same manner as in the inventions according to claims 2 and 8, it is possible to reduce the possibility that each wireless zone enters a congestion state, and to smoothly escape from the congestion state. But with high accuracy. Also, in the inventions according to claims 4 and 10, the terminal can provide a communication service while flexibly adapting to the zone configuration and the traffic distribution in each wireless zone, as compared with the inventions according to claims 3 and 9. Can be provided.

Further, according to the invention described in claim 5, as long as the channel setting procedure and the message format are consistent,
The inventions described in claims 1 to 4 are applicable to existing mobile communication systems. Therefore, in the mobile communication system to which these inventions are applied, for each wireless zone, the number of serving terminals is adjusted to a value flexibly adapted to the traffic distribution and the number of allocatable wireless channels. In addition, operational efficiency and service quality are improved.

[Brief description of the drawings]

FIG. 1 is a principle block diagram of the invention according to claims 1 to 5;

FIG. 2 is a principle block diagram of the invention according to claims 6 and 7;

FIG. 3 is a principle block diagram of the invention according to claims 8 to 10;

FIG. 4 is a diagram showing an embodiment corresponding to the invention described in claims 1 to 10;

FIG. 5 is a diagram for explaining the operation of the present embodiment corresponding to the invention described in claims 1, 5, 6, and 8;

FIG. 6 is an operation flowchart of the present embodiment corresponding to the first, second and fifth to eighth aspects of the present invention.

FIG. 7 is a diagram showing information transmitted via an associated control channel FACCH.

FIG. 8 is a diagram showing information transmitted via a dedicated cell channel SCCH.

FIG. 9 is a diagram showing information transmitted via an associated control channel SACCH.

FIG. 10 is an operation flowchart of the present embodiment corresponding to the third, fourth, ninth, and tenth aspects of the present invention.

FIG. 11 is a diagram illustrating a configuration example of a PHS.

FIG. 12 is a diagram showing a location registration sequence in a conventional example.

[Explanation of symbols]

 11, 40 Wireless zone 12, 82, 94 Terminal (PT) 13 Base station 14, 42 Outgoing area promotion means 21, 51 Outgoing area terminal storage means 22, 52 Reentry area prevention means 31, 71 Outgoing area recording means 41 Channel Setting means 61 location registration means 62 channel control means 80,90 radio base station 81,93 exchange 83,100 processor 91 minimal zone 92 inter-station transmission line 95 antenna 96 antenna interface unit 97 modem unit 98 TDMA control unit 99 line interface unit

Claims (10)

[Claims] 1. A terminal for performing location registration in a wireless zone that satisfies a condition in which standby is permitted among a plurality of wireless zones adapted to a small zone system, and securing a communication path of a call generated in a local station; The plurality of wireless zones are individually formed, and among the terminals,
For a terminal located in the formed wireless zone, a plurality of base stations for performing channel setting of the generated call in cooperation with the terminal and providing a communication service are provided. The radio zone formed by the station is monitored for the probability of occurrence of a call loss due to the shortage of radio channels, and among the terminals, the individual terminal on which a completed call has occurred has its probability set to a predetermined threshold. When it exceeds and below
A mobile communication system, comprising: outgoing area promotion means for giving commands indicating tightening and easing of the condition in which the standby is permitted. 2. The mobile communication system according to claim 1, wherein the plurality of base stations use, in a channel setting procedure, identification information of a terminal that has exited from a wireless zone formed by the own station at the time of call termination. Outgoing terminal storage means that retains the identification information of the terminal for a period in which the probability of occurrence of a call loss monitored by the outgoing promotion means exceeds a predetermined threshold, and Acquiring, based on the channel setting procedure, identification information of a terminal that attempts location registration with respect to a wireless zone formed by the own station, and determines whether or not the identification information is stored in the serving terminal storage unit. And determine
A mobile communication system, comprising: a re-entry block means for restricting the location registration when the result of the determination is true. 3. The mobile communication system according to claim 1 or claim 2, wherein the terminal sets a wireless zone that has been departed because the instruction to tighten the conditions under which standby is permitted has been given by the departure promotion means. Having a service zone recording means for holding zone identification information indicating the wireless zone, a zone identification held by the service zone recording means from a plurality of wireless zones from a wireless zone in which location registration trial is permitted. A mobile communication system comprising means for excluding a specific wireless zone indicated by information and making the remaining wireless zones candidates for which location registration trials should be performed. 4. The mobile communication system according to claim 1 or claim 2, wherein the terminal is provided with a command for tightening a condition under which standby is permitted by the service promotion unit, and Having a service zone recording means for holding zone identification information indicating the wireless zone, and, among a plurality of wireless zones, candidate wireless zones for which location registration trials are permitted are stored by the service zone recording means. It is determined whether or not a specific wireless zone indicated by the zone identification information is included. If the result of this determination is true, priority is given to this location registration with respect to candidate wireless zones other than the specific wireless zone. A mobile communication system comprising: means for performing a trial. 5. The mobile communication system according to any one of claims 1 to 4, wherein the outgoing service promotion means should be mutually transmitted / received to / from a terminal in a channel setting procedure and a channel setting process. A mobile communication system characterized by giving an instruction to tighten and relax conditions under which standby is permitted while maintaining compatibility with a message format. 6. A channel setting for forming a wireless zone adapted to the small zone system, for a terminal located in the wireless zone, performing a channel setting for an originated call in cooperation with the terminal, and providing a communication service. Means, for the wireless zone, monitor the probability that a call loss due to shortage of wireless channels will occur, and for each terminal where a completed call has occurred in this wireless zone, the probability is set to a predetermined threshold. A base station apparatus comprising: outgoing area promotion means for giving commands indicating tightening and relaxation of conditions under which standby is permitted, when the number exceeds the number and when the number falls below the number. 7. The base station apparatus according to claim 6, wherein, among the terminals for which a completed call has occurred in the wireless zone, identification information of the terminal that has exited from the wireless zone at the time of call termination is based on a channel setting procedure. Acquisition and outgoing terminal storage means that holds the identification information of the terminal only for a period in which the probability of occurrence of a call loss monitored by the outgoing promotion means exceeds a predetermined threshold, The identification information of the terminal attempting the location registration is acquired based on the channel setting procedure, and it is determined whether or not the identification information is stored in the outgoing terminal storage means. And a re-entry block means for restricting the location registration when. 8. A position registering means for performing position registration in a wireless zone satisfying a condition in which standby is permitted among a plurality of wireless zones adapted to a small zone system, and said position registering means among said plurality of wireless zones Channel control means for setting a channel for a call generated in the wireless zone in which the location registration has been completed and securing a communication path, wherein the channel control means is secured for a completed call generated in its own station. A mobile station apparatus that updates conditions under which standby is to be permitted in accordance with a tightening command and a mitigation command given via a communication channel, and performs departure based on the updated conditions. . 9. The service zone recording means according to claim 8, wherein zone identification information indicating a radio zone set out at the end of the call in response to an instruction to tighten the conditions under which standby is permitted is stored. A location registration unit, from among a plurality of wireless zones, a wireless zone that satisfies a condition under which a location registration attempt is permitted, and a specific wireless zone indicated by zone identification information held by the service zone recording unit. , And the remaining wireless zones are candidates for which location registration trials should be performed. 10. The mobile station apparatus according to claim 8, wherein the mobile station apparatus stores zone identification information indicating a wireless zone in which the mobile phone has exited at the time of the end of the call in response to a tightening command for a condition in which standby is permitted. Location registering means, for a candidate wireless zone that satisfies a condition under which a location registration attempt is allowed among a plurality of wireless zones, a specific wireless area indicated by zone identification information held by the service zone recording means. Determining whether or not a wireless zone is included, and when the result of the determination is true, prioritizing a candidate wireless zone other than the specific wireless zone and performing a location registration attempt; Station equipment.