CN1708176A - Handover control equipment, and handover control method, radio resource management equipment, network resource management equipment and mobile communication system - Google Patents

Handover control equipment, and handover control method, radio resource management equipment, network resource management equipment and mobile communication system Download PDF

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Publication number
CN1708176A
CN1708176A CN 200510074829 CN200510074829A CN1708176A CN 1708176 A CN1708176 A CN 1708176A CN 200510074829 CN200510074829 CN 200510074829 CN 200510074829 A CN200510074829 A CN 200510074829A CN 1708176 A CN1708176 A CN 1708176A
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China
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radio access
access system
switching
destination
radio
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CN 200510074829
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Chinese (zh)
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田边哲通
天田博章
柿岛纯
田村基
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NTT Docomo Inc
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NTT Docomo Inc
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Abstract

A handover control equipment includes a handover destination determining unit configured to determine a handover destination radio access system based on communication quality of a communicating communication type used in a radio access system to which a mobile terminal connects, radio resource use statuses of handover destination candidate radio access systems, and communication qualities of communication types provided by handover destination candidate radio access systems, and a handover controller configured to control handover to the handover destination radio access system.

Description

Switching control and method, Radio Resource and management equipment, network resource management equipment and mobile communication system
The cross reference of related application
The present invention is based on formerly Japanese patent application No.2004-167519 and No.2004-306146, and require the priority of these patent applications, described patent application is submitted on June 4th, 2004 and on October 20th, 2004 respectively, and its full content is incorporated herein by reference.
Technical field
The present invention relates to switching control, wireless resource management apparatus, management equipment, network resource management equipment, mobile communication system and method for handover control.
Background technology
The handoff technique that carries out was in the past, and in 1 radio access system, portable terminal switches the base station that is connected along with moving.When having proposed the switching in this 1 radio access system, before and after it, keep the method for communication quality.(for example, the spy opens the 2003-32725 communique).On the other hand, in recent years, proposed to use mobile IP (Mobile IP), supported moving of portable terminal, striden the method for the switching of different radio access system with the IP level.
But, in only with the changing method that switches to object in 1 radio access system in the past, can't realize striding the switching of different radio access system after all.In addition, though by using mobile IP can realize switching between the different radio access system,, can't maintain the desired communication quality of traffic category that carries out before the switching after switching sometimes.
Summary of the invention
The objective of the invention is to: during switching between the different radio access system, also can maintain the desired communication quality of traffic category that carries out before the switching after the switching.
The switching control that relates to one embodiment of the present invention, have: according to the communication quality of the traffic category in the communication in the radio access system in portable terminal connects, switch the Radio Resource in the radio access system of destination candidate behaviour in service, switch the communication quality of the traffic category that the radio access system of destination candidate provides, the switching destination determination section of the radio access system of destination is switched in decision; With the switch control portion of controlling for the radio access system to the switching destination that is determined switches.
According to such switching control, can judge in the radio access system in portable terminal connects, whether whether the radio access system that switches the destination candidate can provide the desired communication quality of current traffic category of communicating by letter, can guarantee for keeping the necessary amount of radio resources of the desired communication quality of current traffic category of communicating by letter, the radio access system of destination is switched in decision, carries out to switch.For this reason, during switching between different radio access systems, also can maintain the desired communication quality of traffic category that carries out before the switching after the switching.In addition, what is called maintains the desired communication quality of traffic category that carries out before the switching, is meant more than the communication quality of keeping before switching, and also comprises and improves communication quality.
The wireless resource management apparatus that relates to one embodiment of the present invention, according to based at least 1 of the indication of guaranteeing of the indication that provides of the Radio Resource behaviour in service of the switching control of the switching between the different radio access system of control or Radio Resource, carry out providing or guarantee at least 1 of Radio Resource to the behaviour in service of the Radio Resource of switching control.
According to such wireless resource management apparatus, the behaviour in service of Radio Resource can be provided to switching control, perhaps guarantee to follow the necessary Radio Resource of switching according to the indication of switching control.Therefore, wireless resource management apparatus can help to consider the control based on the switching between radio access systems communication quality, different of switching control.Therefore, wireless resource management apparatus can help keeping of the desired communication quality of traffic category that carries out before switching.
The network administration apparatus that relates to one embodiment of the present invention, according to the indication of guaranteeing, guarantee by switch the Internet resources of necessary core net to the radio access system that switches the destination based on the Internet resources of the core net of the switching control of the switching between the different radio access system of control.
According to such management equipment, network resource management equipment,, can guarantee to follow the necessary Internet resources of switching according to the indication of switching control.Therefore, management equipment, network resource management equipment can help to consider the control based on the switching between radio access systems communication quality, different of switching control.Therefore, management equipment, network resource management equipment can help keeping of the desired communication quality of traffic category that carries out before switching.
The mobile communication system that relates to one embodiment of the present invention, have: according to the communication quality of the traffic category in the communication in the radio access system in portable terminal connects, switch the Radio Resource in the radio access system of destination candidate behaviour in service, switch the communication quality of the traffic category that the radio access system of destination candidate provides, the radio access system of destination is switched in decision, makes the radio access system of the switching destination that is determined to this switch the switching control of controlling like this; With according to based at least 1 of the indication of guaranteeing of the indication that provides of the Radio Resource behaviour in service of switching control or Radio Resource, providing or at least 1 the wireless resource management apparatus of guaranteeing of Radio Resource to the behaviour in service of the Radio Resource of switching control is provided.
The method for handover control that relates to one embodiment of the present invention, following control: the communication quality of the traffic category that the behaviour in service of the Radio Resource in the communication quality of the traffic category in promptly communicating by letter in the radio access system of basis in portable terminal connects, the radio access system of switching destination candidate, the candidate radio access system of switching destination provide, the radio access system of destination is switched in decision, and the radio access system to the switching destination that is determined switches.
Description of drawings
Fig. 1 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 1st execution mode;
Fig. 2 is the diagram that expression relates to the system information database of the present invention's the 1st execution mode;
Fig. 3 is the diagram that explanation relates to the switching destination candidate notice of the present invention's the 1st execution mode;
Fig. 4 is the diagram that the system of selection of the radio access system that relates to the present invention's the 1st execution mode is described;
Fig. 5 is the flow chart of order that expression relates to the method for handover control of the present invention's the 1st execution mode;
Fig. 6 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 2nd execution mode;
Fig. 7 is the flow chart of order that expression relates to the method for handover control of the present invention's the 2nd execution mode;
Fig. 8 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 3rd execution mode;
Fig. 9 is the diagram that expression relates to the priority data storehouse of the present invention's the 3rd execution mode;
Figure 10 is the diagram of determining method of the radio access system of the explanation switching destination that relates to the present invention's the 3rd execution mode;
Figure 11 is the flow chart of order that expression relates to the method for handover control of the present invention's the 3rd execution mode;
Figure 12 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 4th execution mode;
Figure 13 is the flow chart of order that expression relates to the method for handover control of the present invention's the 4th execution mode;
Figure 14 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 5th execution mode;
Figure 15 is the flow chart of order that expression relates to the method for handover control of the present invention's the 5th execution mode;
Figure 16 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 6th execution mode;
Figure 17 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 7th execution mode;
Figure 18 is the diagram of formation that expression relates to the mobile communication system of the present invention's the 8th execution mode;
Figure 19 is the flow chart of order that expression relates to the method for handover control of the present invention's the 8th execution mode.
Embodiment
The 1st execution mode
As shown in Figure 1, mobile communication system 100 has switching control 20, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.
Portable terminal 40 is accompanied by mobilely, according to the control of switching control 20, strides the switching of different radio access systems.Radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d are connected by wireless the establishment with portable terminal 40, and core net 10 is connected with portable terminal 40.In radio access system, the radio access system of the radio access system of use W-CDMA (Wideband Code Division Multiple Access), the radio access system that uses WLAN, the radio access system that uses OFDM (Orthogonal FrequencyDivision Multiplexing), use PHS (Personal HandyphoneSystem) etc. is for example arranged.
Radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d have wireless resource management apparatus 31a, 31b, 31c, 31d and a plurality of base station 32a, 32b, 32c, 32d respectively.Like this, wireless resource management apparatus 31a, 31b, 31c, 31d are arranged at radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d respectively.
Wireless resource management apparatus 31a, 31b, 31c, 31d, respectively according to based at least 1 of the indication of guaranteeing of the indication that provides of the behaviour in service of the Radio Resource of switching control 20 or Radio Resource, carry out the Radio Resource behaviour in service of radio access system (#A) 30a, radio access system (#B) 30b of wireless resource management apparatus 31a, 31b, 31c, 31d management, radio access system (#C) 30c, radio access system (#D) 30d providing or guarantee at least 1 of Radio Resource to switching control 20.
Wireless resource management apparatus 31a, 31b, 31c, 31d obtain the behaviour in service of the Radio Resource of each base station 32a, 32b, 32c, 32d respectively from each base station 32a, 32b, 32c, 32d.Wireless resource management apparatus 31a, 31b, 31c, 31d can obtain the behaviour in service of the Radio Resource of vacant resource etc. termly, also can obtain when the indication that has from switching control 20.After the indication that provides of behaviour in service of Radio Resource was provided from switching control 20 for wireless resource management apparatus 31a, 31b, 31c, 31d, the behaviour in service of the Radio Resource that will obtain from each base station 32a, 32b, 32c, 32d offered switching control 20.
Radio Resource has frequency band, time slot, wireless channel etc.Behaviour in service can be represented with the use amount of Radio Resource, also can represent with operable amount of radio resources (vacant situation).
After wireless resource management apparatus 31a, 31b, 31c, 31d obtain the indication of guaranteeing 2 of necessary Radio Resource from switching control 20 respectively, just guarantee the Radio Resource of each base station 32a, 32b, 32c, 32d.Whether wireless resource management apparatus 31a, 31b, 31c, 31d will can guarantee that indicated Radio Resource is as guaranteeing that result notification 3 offers switching control 20.
The switching that the different radio access system of switching control 20 controls is asked.Switching control 20 is arranged at core net 10.Switching control 20 has the destination of switching determination section 21, switch control portion 22, Radio Resource behaviour in service collection unit 23 and system information database 24.
The system information that system information database 24 is preserved about radio access system.System information comprises the communication quality of the traffic category that radio access system can provide, the amount of radio resources (to call " necessary Radio Resource " in the following text) of guaranteeing necessity of its communication quality, expense etc.Traffic category has for example sound conversation or data packet communication, Motion picture communication etc.Communication quality has transmission speed, error rate, delay allowance, loss of packets rate, postpones fluctuating etc.
System information database 24 is pressed radio access system, is preserved communication quality and necessary Radio Resource by traffic category.Press radio access system, by the communication quality of traffic category, for example can be used in design load (to call (quality design load) in the following text) expression that designs in each radio access system by the communication quality of traffic category.In addition, the kind difference of the communication quality of paying attention to by traffic category.For example, in the sound conversation, pay attention to delay allowance, in data packet communication, pay attention to the loss of packets rate.Therefore, the kind of the communication quality that system information database 24 is preserved can be by radio access system, by the traffic category difference.In addition, what system information database 24 was preserved can be a plurality of by radio access system, by the kind of the communication quality of traffic category, also can be 1.
Fig. 2 represents an example of system information database 24.The radio access system name is the identifying information of radio access system.As the identifying information of radio access system, can use radio access system ID etc.Traffic category ID is the identifying information of communications category.In the present embodiment, the conversation of traffic category ID " #1 " expression sound, traffic category ID " #2 " represents data packet communication, " * " is illustrated in its traffic category is not provided in its radio access system.
System information database 24 shown in Figure 2 is preserved the quality design load of the sound conversation of the traffic category ID " #1 " among radio access system (#A) 30a for example and is preserved the such system information of data packet communication that traffic category ID " #2 " is not provided for " X1～X2 ", necessary Radio Resource for the system information and radio access system (#B) 30b of " R11～R12 ".In the example of system information database shown in Figure 2 24, though press radio access system, press the necessary Radio Resource of traffic category preservation about 1 communication quality, but, also can preserve the necessary Radio Resource of pressing communication quality to a plurality of communication qualities by radio access system, by traffic category.
Switch destination determination section 21, in the radio access system (to call " connected system " in the following text) in portable terminal 40 connects, the communication quality of the traffic category that the radio access system of the behaviour in service of the Radio Resource in the radio access system of the communication quality of the traffic category in the communication, switching destination candidate, switching destination candidate provides, the radio access system of destination is switched in decision.
Switch destination determination section 21, obtain the notice (to call " switching destination candidate notice " in the following text) of the radio access system that switches the destination candidate from portable terminal 40.Notify 1 trigger based on the switching destination candidate of this portable terminal 40 for switching.Switch destination determination section 21 and notify 1, detect portable terminal 40 and handle the situation that to switch by obtaining switching destination candidate.The so-called radio access system that switches the destination candidate is that portable terminal 40 can receive electric wave, the radio access system of the base station that existence can connect.Therefore, connected system is also included within the candidate of switching destination sometimes.Portable terminal 40 has the electric wave that receives each base station 32a, 32b, 32c, 32d transmission, base station, the transmission switching destination candidate that detection can connect notified 1 function.
Switching destination candidate is notified the identifying information of the information that comprises expression switching destination candidate in 1, current traffic category of communicating by letter, portable terminal 40 etc.The information that the destination candidate is switched in expression has additional information such as the identifying information of the corresponding identifying information that switches the radio access system of destination candidate, base station that portable terminal 40 can connect and the receiving quality of the electric wave that portable terminal 40 receives from the base station etc.The identifying information of base station has number of base stations etc.The identifying information of portable terminal 40 has user ID or mobile terminal number etc.The switching destination candidate that switching destination determination section 21 is for example obtained the information that comprises expression switching destination candidate as shown in Figure 3 notifies 1.The information of destination candidate is switched in expression, the number of base stations that can connect for the additional radio access system name of correspondence, portable terminal 40, from the information of the receiving quality of the electric wave of its base station.
Switch destination determination section 21, preserve the threshold value that is used to become the receiving quality that switches the destination candidate.And switching destination determination section 21 relatively switches the destination candidate notifies 1 receiving quality that comprises and threshold value.Switching destination determination section 21 is that threshold value or the radio access system more than it are judged as switching destination candidate with receiving quality.For example, occasion at Fig. 3, the threshold value of switching destination determination section 21 comparison receiving qualities and each receiving quality P (A), P (B), P (C), P (D), when receiving quality P (A), P (B), P (C) are threshold value or its when above, the switching destination candidate that is judged as portable terminal 40 is radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c.Below, to switch the destination candidate be that the situation of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c is that example describes to be judged as.
Switch destination determination section 21, notify 1, the behaviour in service of the Radio Resource in the radio access system of Radio Resource behaviour in service collection unit 23 indication collection switching destination candidates according to switching the destination candidate.Afterwards, switch destination determination section 21 and obtain the behaviour in service of the Radio Resource the radio access system that switches the destination candidate from Radio Resource behaviour in service collection unit 23.And then switching destination determination section 21 is obtained the system information about the radio access system that switches the destination candidate from system information database 24.
Switch destination determination section 21, at first, according to the quality design load of system information, among the radio access system that switches the destination candidate, select can be provided in the radio access system of the current desired communication quality of traffic category of communicating by letter the connected system.Below, will be called " system that can provide " according to quality design load wireless communication system selected, that can be provided in the current desired communication quality of traffic category of communicating by letter the connected system among switching the destination candidate.
Switch destination determination section 21, be stored in the lower limit (to call " lowest quality " in the following text) of the communication quality of institute's minimum requirement in each traffic category and the desired value (to call " target quality " in the following text) of communication quality.Target quality for example can be set the communication quality that portable terminal 40 can better be communicated by letter.Switch destination determination section 21,, can select to provide the radio access system of lowest quality at least, the above radio access system of communication quality that can provide connected system to provide also can be provided as the system that can provide.
For example, as shown in Figure 4, connected system is radio access system (#A) 30a.To switch the destination candidate is that the situation of radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d is that example describes.In Fig. 4, the longitudinal axis is represented communication quality, and target quality, lowest quality are represented desired target quality of current traffic category of communicating by letter and lowest quality.In addition, the communication quality of this longitudinal axis, be for example error rate, delay allowance, loss of packets rate, postpone to rise and fall etc. 1, the quality design load of each radio access system is different because of traffic category.
Switch destination determination section 21, when selecting to provide the radio access system of lowest quality at least, select as shown in Figure 4 radio access system (#B) 30b and radio access system (#C) 30c with the above quality design load of lowest quality.In addition, switch destination determination section 21, when the radio access system more than the communication quality of selecting to provide connected system to provide, select to have radio access system (#B) 30b of the above quality design load of the quality design load of radio access system (#A) 30a.
For example, when connected system when providing the radio access system of data packet communication by W-CDMA, in order to use the high-speed data packet communication higher than current transmission speed, switch destination determination section 21, as the system that can provide, can select radio access system that provides by WLAN data packet communication etc.In addition, be to select the radio access system of lowest quality at least can be provided, still selection can provide the above radio access system of communication quality that connected system provides, provide portable terminal 40 to specify any 1 switching destination candidate notice, switching destination determination section 21 can specify according to it, also can preestablish at switching destination determination section 21.
Then, switch destination determination section 21, behaviour in service and necessary Radio Resource according to the Radio Resource in the radio access system of the switching destination candidate of collecting, from the system that can provide, can guarantee to keep the radio access system decision of the necessary amount of radio resources of the desired communication quality of current traffic category of communicating by letter for switching the radio access system of destination.
For example, when switching destination determination section 21 and selected radio access system (#B) 30b and radio access system (#C) 30c, respectively to radio access system (#B) 30b and radio access system (#C) the 30c relatively behaviour in service and the necessary Radio Resource of Radio Resource as the system that can provide.Switch destination determination section 21, according to its comparative result, for example when being judged as (#C) 30c that has only radio access system can guarantee necessary Radio Resource the time, with radio access system (#C) 30c decision for switching the radio access system of destination.Switch destination determination section 21, notify corresponding additional notifications to give switch control portion 22 with switching destination candidate the radio access system of decision.
In addition, switch destination determination section 21, when having a plurality of radio access system that can guarantee necessary Radio Resource, can therefrom radio access system decision arbitrarily be the switching destination, also can will wherein can provide the radio access system decision of highest communication quality for switching the destination, also wherein the behaviour in service of Radio Resource has abundant radio access system decision to be the switching destination most.On the contrary, switch destination determination section 21, when not having to guarantee the radio access system of necessary Radio Resource, at the appointed time after the standby, the destination is switched in decision once more, also can notify the switching destination that can keep communication quality not exist to portable terminal 40.
Moreover, switch destination determination section 21, also can consider a plurality of communication quality decision switchings destination.For example, when traffic category is Motion picture communication,, set two sides of delay allowance and loss of packets rate as the quality design load.At this moment, switch destination determination section 21, can provide desired delay allowance of current Motion picture communication of communicating by letter and loss of packets rate both sides' radio access system to select as the system that can provide.Afterwards, switch destination determination section 21, among the system that can provide, can guarantee to be maintained in the current Motion picture communication of communicating by letter the necessary amount of radio resources of delay allowance and for the radio access system decision of which many side's of keeping the necessary amount of radio resources of loss of packets rate amount of radio resources for switching the radio access system of destination.
Radio Resource behaviour in service collection unit 23 to providing of the behaviour in service of the radio access system indication Radio Resource that switches the destination candidate, is collected the behaviour in service of Radio Resource.Radio Resource behaviour in service collection unit 23 obtains the indication of collection of the behaviour in service of the Radio Resource the radio access system that switches the destination candidate from switching destination determination section 21.
Radio Resource behaviour in service collection unit 23 sends the indication that provides to wireless resource management apparatus 31a, 31b, 31c, the 31d of the radio access system that switches the destination candidate, and indication provides the behaviour in service of Radio Resource.Afterwards, Radio Resource behaviour in service collection unit 23 obtains the behaviour in service of the Radio Resource of each base station 32a, 32b, 32c, the 32d behaviour in service as each radio access system from wireless resource management apparatus 31a, 31b, 31c, 31d.Radio Resource behaviour in service collection unit 23 is switched destination determination section 21 with the behaviour in service input of the Radio Resource obtained.
Switch control portion 22 is carried out the control that the radio access system to the switching destination that is determined switches.Switch control portion 22 obtains notice with the radio access system that switches the corresponding switching destination that add, that determined of candidate notice, destination from switching destination determination section 21.At first, switch control portion 22 is indicated guaranteeing of necessary Radio Resource to the radio access system of the switching destination that is determined.
Switch control portion 22 sends to the wireless resource management apparatus of the radio access system of the switching destination that is determined with the indication of guaranteeing 2 of necessary Radio Resource, and indication is guaranteed.Afterwards, switch control portion 22 obtains from wireless resource management apparatus 31a, 31b, 31c, 31d and guarantees result notification 3.Switch control portion 22, when guaranteeing that result notification is represented to guarantee Radio Resource, send to portable terminal 40, switch the base station of radio access system of destination or at least 1 of wireless resource management apparatus switching indication 4, indication is to the switching of the radio access system of the switching destination that is determined.Thus, switching control 20 because can control behind the necessary Radio Resource guaranteeing, to switch, therefore can more definitely be guaranteed communication quality.
Specifically, switch control portion 22 obtains the identifying information of the base station that can connect and the identifying information of portable terminal 40 from switch destination candidate notice.Switch control portion 22, when to portable terminal 40 indications, the identifying information of the base station that can connect in the radio access system of the switching destination that expression is determined, indication is to the switching of this base station.Switch control portion 22, when to base station or wireless resource management apparatus indication, the identifying information of portable terminal 40 is represented in the base station that can connect in the radio access system of the switching destination that is determined, indication switches to this radio access system with portable terminal 40.Like this, switch control portion 22 can be controlled, and switches with the radio access system to the switching destination that is determined.
In addition, switch that the destination candidate notifies 1, the indication of guaranteeing 2 of necessary Radio Resource, guarantee result notification 3, switch indication 4 etc., as exchanging with the control data shown in the dotted line among Fig. 1.
Below, use Fig. 5 that the order of the method for handover control in the mobile communication system 100 is described.Switching control 20 is obtained the switching destination candidate that portable terminal 40 sent and is notified 1 (S101).Switching control 20, the behaviour in service of using system information and Radio Resource, the communication quality of the traffic category in communicating by letter in connected system according to portable terminal 40 and switch the communication quality of the traffic category that the radio access system of destination candidate provides, the system that selection may provide (S102).
Switching control 20 is according to switching destination candidate notice, the behaviour in service (S103) of collecting the Radio Resource of the radio access system that switches the destination candidate.Switching control 20, behaviour in service according to the Radio Resource in the radio access system that switches the destination candidate, among the system that can provide, the decision of the radio access system of the necessary Radio Resource of the traffic category in can guaranteeing to communicate by letter is for switching the radio access system (S104) of destination.
Switching control 20 is indicated guarantee (S105) of necessary Radio Resource to the wireless resource management apparatus of radio access system of the switching destination of decision.Afterwards, switching control 20, from the wireless resource management apparatus of radio access system obtain expression can guarantee Radio Resource guarantee result notification after, will indicate to portable terminal 40, the base station of radio access system of switching the destination or at least 1 (S106) of Radio Resource device to the switching of the radio access system of the switching destination that is determined.In addition, step (S101) can be opposite with the order of step (S102).
By such mobile communication system 100, switching control 20, a plurality of radio access systems (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and method for handover control, can judge whether the radio access system that switches the destination can provide portable terminal 40 desired communication quality of current traffic category of communicating by letter in connected system, whether can guarantee to keep the necessary amount of radio resources of the desired communication quality of current traffic category of communicating by letter, the radio access system of destination is switched in decision, carries out to switch.
Therefore, during switching between different radio access systems, after switching, also can maintain the desired communication quality of traffic category that carries out before the switching.Like this, during switching between different radio access systems, the control of the switching by the communication quality after considering to switch can provide the excellent communications state to portable terminal 40.
Moreover switching control 20 has the Radio Resource behaviour in service collection unit 23 to the behaviour in service that provides, collects Radio Resource of the behaviour in service of the radio access system indication Radio Resource that switches the destination candidate.Afterwards, switch the behaviour in service that destination determination section 21 uses collected Radio Resource, the radio access system of destination is switched in decision.Therefore, switching control 20, the behaviour in service of collecting the Radio Resource in the radio access system that switches the destination candidate from its behaviour in service of collecting of initial use, can consider to determine to switch the radio access system of destination in advance.That is, switching control 20 can be confirmed the behaviour in service of the Radio Resource of a plurality of switchings destination candidate, and the destination is switched in decision.
In addition, by wireless resource management apparatus 31a, 31b, 31c, the 31d that on a plurality of radio access systems (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d, is provided with respectively, the behaviour in service of Radio Resource can be provided to switching control 20, perhaps guarantee to follow the necessary Radio Resource of switching according to the indication of switching control 20.Therefore, wireless resource management apparatus 31a, 31b, 31c, 31d can help to consider the control based on the switching between radio access systems communication quality, different of switching control 20.Therefore, wireless resource management apparatus 31a, 31b, 31c, 31d can help keeping of the desired communication quality of traffic category that carries out before switching.
The 2nd execution mode
As shown in Figure 6, mobile communication system 200 has switching control 220, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 220 has the destination of switching determination section 221, switch control portion 222 and system information database 24.In Fig. 6, only attached for the formation identical in fact with identical symbol with mobile communication system 100 shown in Figure 1, omit its explanation.
Switch destination determination section 221, the same with switching destination determination section 21 shown in Figure 1, the system that selection can provide.So, switch destination determination section 221, when the system that can provide is 1, this radio access system decision is the switching destination.Switch destination determination section 221, when a plurality of system that can provide was provided, wherein radio access system decision arbitrarily also can wherein can provide the radio access system decision of highest communication quality to be the switching destination for switching the destination.Below, the radio access system that switches the switching destination of destination determination section 221 initial decisions is called " the 1st switches the destination ".Switch destination determination section 221, the 1st switching destination is notified to and switches the destination candidate notify corresponding adding, be notified to switch control portion 222.
Switch control portion 222 obtains and the notice of switching corresponding the 1st switching destination that adds of destination candidate notice from switching destination determination section 221.At first, switch control portion 222, the same with switch control portion 22 shown in Figure 1, switch the destination to the 1st and indicate guaranteeing of necessary Radio Resource.Afterwards, switch control portion 222 obtains from wireless resource management apparatus 31a, 31b, 31c, 31d and to guarantee result notification.
Switch control portion 222 when guaranteeing that the result notification indication can be guaranteed necessary Radio Resource, is switched by switching the base station indication of destination to portable terminal 40 or the 1st, controlling to the first switching destination.On the other hand, switch control portion 222 when guaranteeing that the result notification indication can not be guaranteed necessary Radio Resource, can not be guaranteed to switching destination determination section 221 notices.
Switch destination determination section 211, when receiving the notice that can not guarantee, the radio access system of destination is switched in decision once more.Switch destination determination section 221, when a plurality of system that can provide is provided, never determine to be the 1st to switch the new switching destination of decision among the system that can provide of destination.At this moment also can be from wherein radio access system decision arbitrarily being the switching destination, it is to switch the destination that the radio access system decision of highest communication quality also can wherein can be provided.
On the other hand, switch destination determination section 221, when the system that can provide has only 1, can give portable terminal 40 with the non-existent advisory in switching destination that can keep communication quality, also after the standby at the appointed time, switch the destination as the radio access system decision of switching the destination with the 1st once more.Below, with switch destination determination section 221 once more the radio access system of the switching destination of decision be called " the 2nd switches the destination ".Switch destination determination section 221, switch the destination and switch the destination candidate the 2nd and notify corresponding adding, be notified to switch control portion 222.
Switch control portion 222 is switched the destination to the 2nd and is indicated guaranteeing of necessary Radio Resource, obtains from wireless resource management apparatus 31a, 31b, 31c, 31d and guarantees result notification.Like this, switch control portion 222 is also carried out guaranteeing of necessary Radio Resource once more.Switch control portion 222 when guaranteeing that result notification is represented to guarantee necessary Radio Resource, is controlled, and switches to switch the destination to the 2nd.
On the other hand, switch control portion 222 in the time can not guaranteeing necessary Radio Resource, can not guarantee to be notified to once more switching destination determination section 221.Switch destination determination section 221, for example with stipulated number or stipulated time, switch the decision of the radio access system of destination, even when reaching stipulated number or stipulated time, in the time of can not guaranteeing necessary Radio Resource, can not exist to the switching destination that portable terminal 40 notices can be kept communication quality.Perhaps, switch destination determination section 221,, can notify the switching destination that to keep communication quality not exist to portable terminal 40 in the moment that the system that can provide does not have.In addition, switch destination determination section 221, switch control portion 222, except that these points, identical in fact with switching destination determination section 21, switch control portion 22 shown in Figure 1.
Use Fig. 7 that the order of the method for handover control in the mobile communication system 200 is described below.Switching control 220 carries out and step shown in Figure 5 (S101), step (S201), (S202) that (S102) is identical.Switching control 220 determines that the radio access system of switching destination is the 1st switching destination among the system that can provide.
Switching control 220 is indicated guaranteeing of necessary Radio Resource to the 1st wireless resource management apparatus of switching the Radio Resource of destination of management decision.Afterwards, switching control 220 is obtained from the 1st wireless resource management apparatus of switching the destination and to be guaranteed result notification, judges whether to guarantee necessary Radio Resource (S204).At step (S204), in the time can guaranteeing necessary Radio Resource, switching control 220, indicating mobile terminal 40 or the 1st switch the base station of destination to the 1st switching destination switching (S205).
On the other hand, in the time can not guaranteeing necessary Radio Resource, switching control 220 turns back to step (S203) in step (S204), and the radio access system of decision switching destination is the 2nd switching destination once more.Switching control 220 under the behaviour in service of current Radio Resource, according to switching the result that necessary Radio Resource can not be guaranteed in the destination the 1st, determines 2 to switch the destination among the system that can provide.Afterwards, switching control 220 advances to step (S204) once more, attempts the 2nd and switches the guaranteeing of necessary Radio Resource of destination.
By such mobile communication system 200, switching control 220 and method for handover control, on basis, can obtain following effect by mobile communication system 100, switching control 20 and the resulting effect of method for handover control shown in Fig. 1,5.
Switch control portion 222, the necessary necessary Radio Resource of communication quality of the traffic category in the wireless resource management apparatus indication communication of the radio access system of the switching destination that is determined guarantee that when guaranteeing necessary Radio Resource, control is switched.In the time that necessary Radio Resource can not be guaranteed, can not guarantee to be notified to switching destination determination section 221.Afterwards, switch destination determination section 221, when receiving the notice that can not guarantee, the destination is switched in decision once more.
Therefore, switching control 220, once the destination is switched in decision, indicates guaranteeing of necessary Radio Resource, according to the result that can not guarantee necessary Radio Resource, can determine to switch the destination once more.That is, switching control 220 can use the result that can not guarantee necessary Radio Resource under the behaviour in service of current Radio Resource, and the destination is switched in decision.And switching control 220 switches because can control after guaranteeing necessary Radio Resource, so can more properly guarantee communication quality.
Whenever in addition, shown in the 1st execution mode, the 2nd execution mode, switch the destination determination section in order to determine to switch the radio access system of destination, the time of using the behaviour in service of Radio Resource can be, its using method is also unrestricted.That is, switch the destination determination section, the behaviour in service of the Radio Resource that can collect from initial use decides, and also can use the result that can not guarantee Radio Resource under the behaviour in service of current Radio Resource to decide.
The 3rd execution mode
As shown in Figure 8, mobile communication system 300 has switching control 320, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 320 has the destination of switching determination section 321, switch control portion 222, system information database 24, priority data storehouse 25 and priority obtaining section 26.In Fig. 8, only attached for the formation identical in fact with identical symbol with Fig. 1, mobile communication system shown in Figure 6 100,200, omit its explanation.
Priority data storehouse 25, the use priority by the radio access system of traffic category of preserving that user by portable terminal 40 sets.Priority data storehouse 25 is pressed the user of portable terminal 40, is preserved by traffic category and use priority.In addition, the setting benchmark that the user uses also can be preserved in priority data storehouse 25 in the setting of priority.Fig. 9 represents an example in priority data storehouse 25.Priority data storehouse 25, corresponding additional with the identifying information of the portable terminal 40 of user ID etc., preserve use priority and its setting benchmark by traffic category.Specifically, a plurality of corresponding additional priority sequence table 25a, 25b～25n by the user with user ID are preserved in priority data storehouse 25.
Each priority sequence table 25a～25n preserves the use priority by traffic category.In addition, " * " is illustrated in its traffic category is not provided in its radio access system.Priority data storehouse 25 shown in Figure 9, for example, the user ID conduct is about the use priority of the traffic category ID " #1 " of the portable terminal 40 of " #a ", and radio access system (#B) is preserved one, radio access system (#A) is preserved two, and radio access system (#D) is preserved three.In addition, priority data storehouse 25, user ID is as the setting benchmark of user's use of the portable terminal 40 of " #a ", about traffic category ID " #1 " preservation " delay allowance ", about traffic category ID " #2 " preservation " loss of packets rate ".
Priority obtaining section 26 is set benchmark from what portable terminal 40 obtained that the user of portable terminal 40 sets by the use priority of the radio access system of traffic category or its.Priority obtaining section 26 stores the use priority that obtains into priority data storehouse 25.The user of portable terminal 40 can be by traffic category, from the use priority of the viewpoint setting wireless access system of its quality design load or expense etc.In addition.Priority obtaining section 26, the use priority that user that for example can be by obtaining portable terminal 40 based on the outside input of communication carrier etc. sets when signing a contract etc.
Priority obtaining section 26, reference system information database 24 to the traffic category of radio access system is not provided, even when the user of portable terminal 40 has set priority, does not store priority into priority data's database 25 yet.Thus, when priority produces when vacant, priority obtaining section 26 is priority in advance.For example, when being priority data storehouse 25 shown in Figure 9, priority obtaining section 26 is to the traffic category storage " * " that radio access system is not provided, priority in advance.In addition, priority obtaining section 26 can obtain system information from system information database 24, sets reference when using priority as the user of portable terminal 40, offers portable terminal 40.
Switch destination determination section 321, identical with switching destination determination section 21 shown in Figure 1, the system that selection can provide.Afterwards, switch destination determination section 321, among the system that can provide, the radio access system that switches the destination according to the use priority decision by the radio access system of traffic category that is set by mobile terminal user promptly the 1st switches the destination.Switch destination determination section 321, among the system that can provide, the radio access system decision that the use priority of current traffic category of communicating by letter in the connected system is the highest is the 1st switching destination.Switch destination determination section 321, from switch destination candidate notice, obtain the identifying information of portable terminal 40.Switch destination determination section 321,, from priority data storehouse 25, obtain the user's of its portable terminal 40 priority, be used to switch the decision of the radio access system of destination according to the identifying information of portable terminal 40.
For example, when switching the traffic category ID " #1 " that destination candidate notice comprises the traffic category in information shown in Figure 3, user ID " #a ", the expression communication, system information database 24 is preserved system information shown in Figure 2, when use priority shown in Figure 9 is preserved in priority data storehouse 25, switch destination determination section 321, as shown in figure 10, select radio access system (#A) 30a and radio access system (#B) 30b as the system that can provide.And then, switch destination determination section 321, the use priority of the traffic category ID " #1 " that the user of the portable terminal 40 of user ID " #a " is set is that one radio access system (#B) 30b decision is the 1st to switch the destination.
In addition, when the system that can provide is 1, switching destination determination section 321, is the 1st switching destination with its radio access system decision.Switch destination determination section 321, switch the destination with the 1st and notify corresponding additional notifications to give switch control portion 222 with switching destination candidate.
Switch destination determination section 321, when when switch control portion 222 receives the notice that can not guarantee, the radio access system of destination is switched in decision once more.Switch destination determination section 321, among the system that can provide, in the traffic category in communication, it is the 2nd switching destination that the 1st next one that switches the destination is used the high radio access system decision of priority.For example, as shown in figure 10, switch destination determination section 321, the use priority of the traffic category ID " #1 " that the user of the portable terminal 40 of user ID " #a " is set is that two radio access system (#A) 30a decision is the 2nd to switch the destination.Switch destination determination section 321, switch the destination with the 2nd and notify corresponding additional notifications to give switch control portion 222 with switching destination candidate.
In addition, switch destination determination section 321, when the system that can provide has only 1, can carry out the processing identical with switching destination determination section shown in Figure 6 221.In addition, switch destination determination section 321,, also can carry out the processing identical with switching destination determination section shown in Figure 6 221 when when switch control portion 222 receives the notice that can not guarantee once more.In addition, switch destination determination section 321, except that these points, the switching destination determination section 21 with shown in Figure 1 is identical in fact.
Below, use Figure 11 that the order of the method for handover control in the mobile communication system 300 is described.Switching control 320 carries out and step shown in Figure 5 (S101), step (S301), (S302) that (S102) is identical.Switching control 320, among the system that can provide, radio access system decision that will the use priority of current traffic category of communicating by letter is the highest in connected system is the 1st to switch destination (S303).
Switching control 320 carries out and step shown in Figure 7 (S204), step (S304), (S305) that (S205) is identical.At step (S304), in the time can not guaranteeing necessary Radio Resource, switching control 320, turn back to step (S303), under the behaviour in service of current Radio Resource, according to switching the result that necessary Radio Resource can not be guaranteed in the destination, among the system that can provide the 1st, in the traffic category in communication, it is the 2nd switching destination that the 1st next one that switches the destination is used the high radio access system decision of priority.Afterwards, switching control 320 enters step (S304) once more, attempts the 2nd and switches the guaranteeing of necessary Radio Resource of destination.
By such mobile communication system 300, switching control 320 and method for handover control, on basis, can obtain following effect by mobile communication system 100,200, switching control 20,220 and the resulting effect of method for handover control shown in Fig. 1,5～7.Switching control 320, the use priority that the user of consideration portable terminal 40 wishes by traffic category can determine to switch the radio access system of destination.Therefore, the radio access system that the user of use portable terminal 40 wishes can provide the excellent communications state to portable terminal 40.
The 4th execution mode
As shown in figure 12, mobile communication system 400 has switching control 420, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 420 has the destination of switching determination section 421, switch control portion 222, Radio Resource behaviour in service collection unit 23 and system information database 24.In Figure 12, only attached for the formation identical in fact with identical symbol with Fig. 1, mobile communication system shown in Figure 6 100,200, omit its explanation.
Switch destination determination section 421, identical with switching destination determination section 21 shown in Figure 1, the system that selection can provide.Then, switch destination determination section 421, the same with switching destination determination section 21 shown in Figure 1, behaviour in service and necessary Radio Resource according to the Radio Resource in the radio access system of the switching destination candidate of collecting, among the system that can provide, the radio access system decision that can guarantee necessary Radio Resource is for switching the radio access system of destination.Switch destination determination section 421, notify corresponding additional notifications to give switch control portion 222 with switching destination candidate the radio access system of decision.
Afterwards, switch destination determination section 421, receive the notice that to guarantee from switch control portion 222 sometimes.For example, switch the moment of the radio access system of destination in decision, though can guarantee necessary Radio Resource, in the actual moment that will guarantee necessary Radio Resource, the Radio Resource of this radio access system is used by other portable terminal, causes sometimes guaranteeing necessary Radio Resource etc.
At this time, switch destination determination section 421, the behaviour in service that indication Radio Resource behaviour in service collection unit 23 is collected Radio Resource once more.Afterwards, switch destination determination section 421,, among the system that can provide, can guarantee that the radio access system of necessary Radio Resource determines once more as the radio access system that switches the destination according to the behaviour in service of the Radio Resource of collecting once more.Afterwards, switch destination determination section 421, notify corresponding adding with switching the destination candidate, be notified to switch control portion 222 radio access system of decision once more.Switch destination determination section 421, except that these points, the switching destination determination section 21 with shown in Figure 1 is identical in fact.
Below, use Figure 13 that the order of the method for handover control in the mobile communication system 400 is described.Switching control 420 carries out the step (S401)～(S404) identical with step shown in Figure 5 (S101)～(S104).Switching control 420 carries out and step shown in Figure 7 (S204), step (S405), (S406) that (S205) is identical.At step (S405), in the time can not guaranteeing necessary Radio Resource, switching control 420 turns back to step (S403), (S404), the behaviour in service of collecting Radio Resource once more, and the radio access system of destination is switched in decision once more.Afterwards, switching control 420 enters step (S405) once more, attempt to switch the guaranteeing of necessary Radio Resource of destination.
By such mobile communication system 400, switching control 420 and method for handover control, on basis by mobile communication system 100,200, switching control 20,220 and the resulting effect of method for handover control shown in Fig. 1,5～7, the variation control that can follow the trail of the behaviour in service of Radio Resource is switched, and can obtain more properly guaranteeing the effect of communication quality.
The 5th execution mode
As shown in figure 14, mobile communication system 500 has switching control 520, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 520 has the destination of switching determination section 521, switch control portion 222, Radio Resource behaviour in service collection unit 23, system information database 24, priority data storehouse 25 and priority obtaining section 26.In Figure 14, only attached to the formation identical in fact with identical symbol with Fig. 1, Fig. 6, mobile communication system shown in Figure 8 100,200,300, omit its explanation.
Switch destination determination section 521, identical with switching destination determination section 21 shown in Figure 1, the system that selection can provide.Then, switch destination determination section 521, the same with switching destination determination section 21 shown in Figure 1, behaviour in service and necessary Radio Resource according to the Radio Resource in the radio access system of the switching destination candidate of collecting, among the system that can provide, selection can be guaranteed the radio access system of necessary Radio Resource.
Afterwards, switch destination determination section 521, the same with switching destination determination section 321 shown in Figure 8, among the radio access system that can guarantee necessary Radio Resource, according to using the priority decision to switch the radio access system of destination.Switch destination determination section 521, among the radio access system that can guarantee necessary Radio Resource, radio access system decision that will the use priority of current traffic category of communicating by letter is the highest in connected system is to switch the destination.Switch destination determination section 521, notify corresponding adding with switching the destination candidate, be notified to switch control portion 222 radio access system of decision.
Afterwards, switch destination determination section 521, receive the notice that to guarantee from switch control portion 222 sometimes.At this time, switch destination determination section 521, the same with switching destination determination section 421 shown in Figure 12, indicate the behaviour in service of collecting Radio Resource once more to Radio Resource behaviour in service collection unit 23.Afterwards, switch destination determination section 521, according to the behaviour in service of the Radio Resource of collecting once more, the radio access system of destination is switched in decision once more, the radio access system of decision once more is corresponding additional to switching destination candidate notice, be notified to switch control portion 222.Switch destination determination section 521, except that these points, the switching destination determination section 21 with shown in Figure 1 is identical in fact.
Below, use Figure 15 that the order of the method for handover control in the mobile communication system 500 is described.Switching control 520 carries out the step (S501)～(S503) identical with step shown in Figure 5 (S101)～(S103).Then, switching control 520, according to the behaviour in service and the necessary Radio Resource of Radio Resource, the radio access system (S504) of the necessary Radio Resource of the traffic category among the system that can provide, selecting can guarantee to communicate by letter.
Afterwards, switching control 520 carries out step (S505), (S507) identical with step shown in Figure 11 (S303)～(S305).At step (S506), in the time can not guaranteeing necessary Radio Resource, switching control 520 turns back to step (S503)～(S505), the behaviour in service of collecting Radio Resource once more, and the radio access system of destination is switched in decision once more.Afterwards, switching control 520 enters step (S506) once more, attempt to switch the guaranteeing of necessary Radio Resource of destination.
By such mobile communication system 500, switching control 520 and method for handover control, can obtain simultaneously by Fig. 8, mobile communication system 300, switching control 320 and the resulting effect of method for handover control shown in Figure 11 with by mobile communication system 400, switching control 420 and the resulting effect of method for handover control shown in Figure 12,13.
The 6th execution mode
As shown in figure 16, mobile communication system 600 has switching control 620, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 620 has the destination of switching determination section 621, switch control portion 22, Radio Resource behaviour in service collection unit 23, system information database 24, contract information database 27 and contract information obtaining section 28.In Figure 16, only attached to the formation identical in fact with identical symbol with mobile communication system 100 shown in Figure 1, omit its explanation.
Contract information database 27 is preserved the contract information of portable terminal 40 utilizable radio access systems or utilizable traffic category etc.The user of portable terminal 40 signs a contract with the communication carrier of providing radio access system in advance, obtains the utilization permission of radio access system.The user also can obtain handy permission by radio access system by can traffic category obtaining utilizing permission.In the contract information,, comprise portable terminal 40 utilizable radio access systems or utilizable traffic category etc. according to such contract.Contract information database 27, corresponding additional with the identifying information of the portable terminal 40 of user ID etc., preserve contract information.Contract information obtaining section 28, outside input by communication carrier etc. obtains contract information.Contract information obtaining section 28 stores the contract information of obtaining into contract information database 27.
Switch destination determination section 621, identical with switching destination determination section 21 shown in Figure 1, the system that selection can provide.Switch destination determination section 621, notify the identifying information of the portable terminal 40 that is comprised, from contract information database 27, obtain contract information according to switching the destination candidate.Switch destination determination section 621,, among the system that can provide, select portable terminal 40 utilizable radio access systems according to the contract information of obtaining.
Afterwards, switch destination determination section 621, the same with switching destination determination section 21 shown in Figure 1, behaviour in service and necessary Radio Resource according to the Radio Resource in the radio access system of the switching destination candidate of collecting, can utilize among the system that can provide from portable terminal 40, the radio access system decision that can guarantee necessary Radio Resource is for switching the radio access system of destination.Switch destination determination section 621, notify corresponding adding with switching the destination candidate, be notified to switch control portion 22 radio access system of decision.Switch destination determination section 621, except that these points, the switching destination determination section 21 with shown in Figure 1 is identical in fact.
Like this, switching control 620 is by having contract information database 27, contract information obtaining section 28, the radio access system that can visit, utilize at core net 10 1 side management portable terminals 40 in advance.Afterwards, switch destination determination section 621, switch the radio access system of destination by information decision based on contract, switching control 620 can consider that contract information controls switching suitably.
In addition, Fig. 6, switching control 220,420 shown in Figure 12 also can have contract information database 27, contract information obtaining section 28, switch the based on contract radio access system of information decision switching destination of destination determination section 221,421.
The 7th execution mode
As shown in figure 17, mobile communication system 700 has switching control 720, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d and portable terminal 40.Switching control 720 has the destination of switching determination section 321, switch control portion 22, system information database 24, priority data storehouse 25, priority obtaining section 726, contract information database 27 and contract information obtaining section 28.In Figure 17, only attached to the formation identical in fact with identical symbol with Fig. 1, Fig. 6, Fig. 8, mobile communication system shown in Figure 16 100,300,600, omit its explanation.
Priority obtaining section 726, from portable terminal 40 obtain use priority after, according to the identifying information of this portable terminal 40, obtain contract information from contract information data 27.Priority obtaining section 726, based on contract information among portable terminal 40 is set the radio access system or traffic category that uses priority, judges whether not comprise portable terminal 40 unavailable radio access systems.
Priority obtaining section 726 to portable terminal 40 unavailable radio access system or traffic categorys, even when portable terminal 40 has been set priority, does not store priority into priority data storehouse 25 yet.Thus, when priority produces when vacant, priority obtaining section 726 is preferential position in advance.For example, when being priority data storehouse 25 shown in Figure 9, priority obtaining section 726 is to portable terminal 40 unavailable radio access systems or traffic category storage " * ", priority in advance.In addition, priority obtaining section 726 can obtain contract information from contract information database 27, and the reference when setting the use priority as portable terminal 40 offers portable terminal 40.
Like this, in switching control 720, priority obtaining section 726 can consider that contract information constructs priority data storehouse 25.Therefore, switch destination determination section 321,, can easily consider the control of the switching of contract information by the use priority of only using priority data storehouse 25 to be preserved.In addition, switching control 520 shown in Figure 14 also can have contract information database 27, contract information obtaining section 28, priority obtaining section 726.
The 8th execution mode
As shown in figure 18, mobile communication system 800 has switching control 820, a plurality of management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, a plurality of radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c, radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f and portable terminal 40.Switching control 820 has the destination of switching determination section 21, switch control portion 822, Radio Resource behaviour in service collection unit 23 and system information database 24.
Radio access system (#E) 30e, radio access system (#F) 30f have wireless resource management apparatus 31e, 31f and base station 32e, 32f respectively.In Figure 18, only attached to the formation identical in fact with identical symbol with mobile communication system 100 shown in Figure 1, omit its explanation.
Management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b are arranged at core net 810.Core net 810 has a plurality of MSC (Mobile Switching Center) 60a, 60b, a plurality of SGSN (Serving GPRS Support Node) 70a, 70b, GMSC (Gateway MSC) 80a, GGSN (Gateway GPRS Support Node) 80b and ATM (Asynchronous TransferMode) net 90.
MSC60a is circuit switch communication, radio access system side of control based on the circuit switching mode of the portable terminal 40 that is connected with radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c.MSC60b is circuit switch communication, radio access system side of control based on the circuit switching mode of the portable terminal 40 that is connected with radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f.GMSC80a is and other network circuit switch that be connected, other network sides.
SGSN70a is packet switch communication, radio access system side of control based on the packet exchange mode of the portable terminal 40 that is connected with radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c.SGSN70b is packet switch communication, radio access system side of control based on the packet exchange mode of the portable terminal 40 that is connected with radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f.GMSC80b is and other network packet switch that be connected, other network sides.
ATM net 90 be between the GMSC80a of the MSC60a of radio access system side, 60b and other network sides, the transmission network transmitted between the GGSN80b of SGSN70a, the 70b of radio access system side and other network sides.ATM90 has a plurality of routers 91.
Management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, the Internet resources of higher management net 810.Management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, according to the indication of guaranteeing, guarantee by switch the Internet resources of necessary core net 810 to the radio access system that switches the destination by the Internet resources of switching control 820.
Management equipment, network resource management equipment (#A) 50a, the Internet resources that the portable terminal 40 that management is connected with radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c utilizes.Specifically, the resource of the MSC60a of the portable terminal that is connected with radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c of management 40 utilizations and SGSN70a or be used for transmitting to GGSN80b to GMSC80a, from SGSN70a the resource of the ATM net 90 of data from MSC60a.
Management equipment, network resource management equipment (#B) 50b, the Internet resources that the portable terminal 40 that management is connected with radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f utilizes.Specifically, the resource of the MSC60b of the portable terminal that is connected with radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f of management 40 utilizations and SGSN70b or be used for transmitting to GGSN80b to GMSC80a, from SGSN70b the resource of the ATM net 90 of data from MSC60b.
Like this, radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c are accommodated management equipment, network resource management equipment (#A) 50a.Radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f are accommodated management equipment, network resource management equipment (#B) 50b.In addition, the disposal ability of for example MSC60a, 60b, SGSN70a, 70b, ATM net 90 or data storage capacity etc. are arranged in the Internet resources.
Management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, after obtaining the indication of guaranteeing 5 of Internet resources from switching control 820 respectively, guarantee by switch the resource of necessary core net 810 to the radio access system that switches the destination.
Specifically, management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b obtain the indication of guaranteeing of the Internet resources of the traffic category switched in destination and the designated communication or its communication quality.Afterwards, for example when conversing as the sound that switches the traffic category given line exchanged form in destination specific radio access system (#C) 30c, the conduct communication, management equipment, network resource management equipment (#A) 50a guarantees the resource of the router 91 on the resource of MSC60a and the transmission path from MSC60a to GMSC80a, and sets user data (voice data) with portable terminal 40 and be transferred to path 7a (network delivery vehicle) in the core net 810.
In addition, for example, when as switching destination specific radio access system (#D) 30d, as traffic category specific data packet communication in the communication and delay allowance thereof, management equipment, network resource management equipment (#B) 50b guarantees the resource of the router 91 on the resource of SGSN70b and the transmission path from SGSN70b to GGSN80b in order to satisfy delay allowance, and sets the user data transmission of portable terminal 40 to the interior path 7b (network delivery vehicle) of core net 810.
After management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, the guaranteeing of indicated Internet resources finish, will guarantee that end notification 6 offers switching control 820.
Switch control portion 822, Internet resources from necessary core net 810 to the radio access system that switches the destination that will be by switching guarantee to indicate management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b to its Internet resources of management.
Specifically, switch control portion 822, the Internet resources and the related information of which radio access system of in store in advance management equipment, network resource management equipment and management equipment, network resource management equipment management.That is, switch control portion 822, the corresponding relation (to call " correspondence relationship information " in the following text) of the radio access system that preservation management equipment, network resource management equipment and management equipment, network resource management equipment are accommodated.
As shown in figure 18, switch control portion 822, radio access system (#A) 30a, radio access system (#B) 30b, radio access system (#C) 30c is corresponding with management equipment, network resource management equipment (#A) 50a additional, radio access system (#D) 30d, radio access system (#E) 30e, radio access system (#F) 30f is corresponding with management equipment, network resource management equipment (#B) 50b additional, preserve as correspondence relationship information.
Afterwards, switch control portion 822 according to the switching destination and the correspondence relationship information of the current radio access system that is connecting, decision, judges that whether the management equipment, network resource management equipment of the Internet resources that managing mobile terminal 40 utilizes changes because of switching.That is, switch control portion 822 judges whether the path (network delivery vehicle) of following switching to be transferred to the user data in the core net 810 is changed, and therefore guarantees whether the management equipment, network resource management equipment of Internet resources is changed.
For example, be connected with radio access system (#C) 30c when portable terminal 40 is current, when the switching destination is radio access system (#D) 30d, is judged as the management equipment, network resource management equipment of accommodating radio access system and changes to management equipment, network resource management equipment (#B) 50b from management equipment, network resource management equipment (#A) 50a because of switching.
On the other hand, be connected with radio access system (#C) 30c when portable terminal 40 is current, when the switching destination is radio access system (#B) 30b, is judged as the management equipment, network resource management equipment of accommodating radio access system and does not change because of switching, still is original management equipment, network resource management equipment (#A) 50a.
Switch control portion 822 when being judged as management equipment, network resource management equipment when being changed, sends to the management equipment, network resource management equipment of change destination with the indication of guaranteeing 5 of Internet resources, and indication is guaranteed.Specifically, switch control portion 822 is specified traffic category or its communication quality in switching the destination and communicating by letter, indicates.
Switch control portion 822 obtains from management equipment, network resource management equipment 50a, 50b and to guarantee end notification 6.Switch control portion 822 can be guaranteed Radio Resource, obtain when guaranteeing end notification 6 from the result notification 3 of guaranteeing of wireless resource management apparatus when indication, can confirm to guarantee Radio Resource and Internet resources.Afterwards, switch control portion 822, indication is to the switching of the radio access system of the switching destination that is determined.
In addition, except that these points, switch control portion 822 switch control portion 22 with shown in Figure 1 in fact is identical.In addition, the indication 5 that Internet resources are guaranteed, guarantee end notification 6 etc., exchange as the control data that is represented by dotted lines among Figure 18.
Below, use Figure 19 that the order of the method for handover control in the mobile communication system 800 is described.Portable terminal 40 will switch the destination candidate notifies 1 to send to switching control 820 (S601).Switching control 820 is the same with step (S102)～(S104) shown in Figure 5, and the radio access system (S602) of destination is switched in decision.At this, be that example describes when being radio access system (#D) 30d with decision switching destination.
Switching control 820 sends to the indication of guaranteeing 2 of necessary Radio Resource the wireless resource management apparatus 31d (S603) of radio access system (#D) 30d of the switching destination of decision.
And then switching control 820 judges whether to change management equipment, network resource management equipment (S604) because of switching.
Switching control 820, for example when portable terminal 40 with radio access system (#C) when 30c is connected, be judged as because of switching and change to management equipment, network resource management equipment (#B) 50b from management equipment, network resource management equipment (#A) 50a.Afterwards, switching control 820 is given management equipment, network resource management equipment (#B) 50b (S605) with the indication 5 that Internet resources are guaranteed.
Receive the wireless resource management apparatus 31d of indication, guarantee necessary Radio Resource (S606), and will guarantee that result notification 3 sends to switching control 820 (S607).Moreover management equipment, network resource management equipment (#B) 50b also guarantees Internet resources, and sets with the user data transmission of portable terminal 40 to the interior path 7b (network delivery vehicle) of core net 810 (S608).Management equipment, network resource management equipment (#B) 50b will guarantee that end notification 6 sends to switching control 820 (S609).
Switching control 820, according to guaranteeing result notification 3 and guarantee end notification 6, guarantee Radio Resource and Internet resources both sides after, for example will switch indication 4 and send to portable terminal 40, (S610) switched in indication.Afterwards, portable terminal 40 is carried out and is switched (S611).
In addition, in step (S604), switching control 820, for example when current mobile terminal 40 with radio access system (#E) when 30e is connected, be judged as management equipment, network resource management equipment and do not change because of switching.At this moment, switching control 820 does not carry out the indication to management equipment, network resource management equipment (#B) 50b, obtains from wireless resource management apparatus 31d and guarantees result notification 3, confirm the guaranteeing of Radio Resource after, (S610) switched in indication.
By such mobile communication system 800, switching control 820, management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b, method for handover control, not only can guarantee to follow and switch necessary Radio Resource, also can guarantee the Internet resources of core net 810.Therefore, can after switching, also more properly keep the desired communication quality of traffic category that carries out before the switching.In addition, management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b help to consider the control of the switching between radio access systems communication quality, different of switching control 820.
In addition, Fig. 6, Fig. 8, Figure 12, Figure 14, Figure 16, mobile communication system 200,300,400,500,600,700 shown in Figure 17 also can have management equipment, network resource management equipment (#A) 50a, management equipment, network resource management equipment (#B) 50b that is provided with in core net 810.So switching control 220,320,420,520,620,720 also can have the function of guaranteeing of the Internet resources of indication switch control portion 820.In addition, the kind of the Internet resources of management equipment, network resource management equipment management is not limited, and for example can manage the resource of router set on core etc. yet.
Variation
The present invention is not limited to above-mentioned execution mode, can carry out various changes.For example, switching control 20,220,320,420,520,620,720,820 can have the hope cost data storehouse that the user who preserves portable terminal 40 wishes expense.At this moment, system information database 24 shown in Figure 2 is preserved the expense of pressing radio access system, pressing traffic category.So switching destination determination section 21,221,321,421,521,621 can and wish the cost data storehouse by reference system information database 24, the consideration expense decides switches the destination.
In addition, in the above-described embodiment, though be illustrated with the situation that in switching destination candidate notice, comprises current traffic category of communicating by letter, but switching control 20,220,320,420,520,620,720,820 also can have the traffic category database of preserving current traffic category of communicating by letter.The traffic category database is with corresponding additional preservation the with the traffic category during it is communicated by letter of identifying information of portable terminal 40.For example, switch control portion 22,222, when the communication of portable terminal 40 begins or traffic category when change, can be from radio access system or portable terminal 40, obtain current traffic category of communicating by letter with corresponding the adding of identifying information of portable terminal 40, register, be updated to the traffic category database.
At this moment, portable terminal 40 there is no need to comprise current traffic category of communicating by letter in switching destination candidate notice.In addition, switch destination determination section 21,221,321,421,521,621, can from switch destination candidate notice, obtain current traffic category of communicating by letter, and from the traffic category database, obtain.

Claims (12)

1. switching control has:
The communication quality of the traffic category that provides according to the radio access system of the communication quality of the traffic category in the communication in the radio access system in portable terminal connects, the behaviour in service of switching the Radio Resource in the radio access system of destination candidate, described switching destination candidate, the switching destination determination section of the radio access system of destination is switched in decision;
The switch control portion of controlling for the radio access system to the switching destination that this determined switches.
2. switching control according to claim 1, wherein,
Have to the radio access system of described switching destination candidate and indicate the behaviour in service that described Radio Resource is provided, the Radio Resource behaviour in service collection unit of collecting the behaviour in service of described Radio Resource;
Described switching destination determination section uses the behaviour in service of the described Radio Resource of collecting, and determines the radio access system of described switching destination.
3. switching control according to claim 1, wherein,
Described switch control portion, indicate the guaranteeing of the necessary necessary Radio Resource of communication quality of the traffic category in the described communication to the radio access system of described switching destination, control makes and switches when guaranteeing described necessary Radio Resource, in the time can not guaranteeing described necessary Radio Resource, can not guarantee to be notified to described switching destination determination section;
Described switching destination determination section when receiving the described notice that can not guarantee, determines described switching destination once more.
4. switching control according to claim 1, wherein,
Described switching destination determination section according to the use priority by the radio access system of described each traffic category that is set by described mobile terminal user, determines the radio access system of described switching destination.
5. switching control according to claim 1, wherein,
Described switch control portion will be switched the guaranteeing of Internet resources of necessary core net by the radio access system to described switching destination, and the management equipment, network resource management equipment of these Internet resources of management is given in indication.
6. wireless resource management apparatus,
According to based at least 1 of the indication of guaranteeing of the indication that provides of the Radio Resource behaviour in service of the switching control of the switching between the different radio access system of control or described Radio Resource, carry out providing or guarantee at least 1 of described Radio Resource to the behaviour in service of the Radio Resource of described switching control.
7. management equipment, network resource management equipment,
According to the indication of guaranteeing, guarantee by switch the Internet resources of necessary core net to the radio access system that switches the destination based on the Internet resources of the core net of the switching control of the switching between the different radio access system of control.
8. mobile communication system has:
The communication quality of the traffic category that provides according to the radio access system of the communication quality of the traffic category in the communication in the radio access system in portable terminal connects, the behaviour in service of switching the Radio Resource in the radio access system of destination candidate, described switching destination candidate, the radio access system of destination is switched in decision, the switching control that control is switched to the radio access system of the switching destination that this determined;
According to based at least 1 of the indication of guaranteeing of the indication that provides of the Radio Resource behaviour in service of this switching control or described Radio Resource, carry out providing or at least 1 the wireless resource management apparatus of guaranteeing of described Radio Resource to the behaviour in service of the Radio Resource of described switching control.
9. mobile communication system according to claim 8, wherein,
Have the indication guaranteed of basis, guarantee to switch the management equipment, network resource management equipment of the Internet resources of necessary core net by radio access system to described switching destination based on the Internet resources of the core net of described switching control.
10. method for handover control,
The communication quality of the traffic category that provides according to the radio access system of the communication quality of the traffic category in the communication in the radio access system in portable terminal connects, the behaviour in service of switching the Radio Resource in the radio access system of destination candidate, described switching destination candidate, the radio access system of destination is switched in decision;
Control is switched the radio access system of the switching destination that determines to this.
11. method for handover control according to claim 10, wherein,
In the radio access system of described switching destination, guarantee the necessary necessary Radio Resource of communication quality of the traffic category in the described communication.
12. method for handover control according to claim 10, wherein,
Guarantee to switch the Internet resources of necessary core net by radio access system to described switching destination.
CN 200510074829 2004-06-04 2005-06-03 Handover control equipment, and handover control method, radio resource management equipment, network resource management equipment and mobile communication system Pending CN1708176A (en)

Applications Claiming Priority (3)

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JP2004167519 2004-06-04
JP2004167519 2004-06-04
JP2004306146 2004-10-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102612840A (en) * 2009-11-06 2012-07-25 株式会社Ntt都科摩 Mobile communication system, radio control apparatus, core network apparatus, mobile communication terminal and mobile communication method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102612840A (en) * 2009-11-06 2012-07-25 株式会社Ntt都科摩 Mobile communication system, radio control apparatus, core network apparatus, mobile communication terminal and mobile communication method
US8953558B2 (en) 2009-11-06 2015-02-10 Ntt Docomo, Inc. Mobile communication system, radio control apparatus, core network apparatus, mobile communication terminal and mobile communication method
CN102612840B (en) * 2009-11-06 2016-03-02 株式会社Ntt都科摩 Mobile communication system, control device of wireless, core network device, mobile communication terminal and method of mobile communication

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