CN102088745A - Switching pre-processing method - Google Patents

Switching pre-processing method Download PDF

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Publication number
CN102088745A
CN102088745A CN2009102119669A CN200910211966A CN102088745A CN 102088745 A CN102088745 A CN 102088745A CN 2009102119669 A CN2009102119669 A CN 2009102119669A CN 200910211966 A CN200910211966 A CN 200910211966A CN 102088745 A CN102088745 A CN 102088745A
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China
Prior art keywords
base station
sub
district
adjacent base
terminal
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CN2009102119669A
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CN102088745B (en
Inventor
陈琳
谢峰
江辉
褚丽
刘扬
鲁照华
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ZTE Corp
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ZTE Corp
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Priority to CN200910211966.9A priority Critical patent/CN102088745B/en
Priority to PCT/CN2010/078790 priority patent/WO2011069405A1/en
Publication of CN102088745A publication Critical patent/CN102088745A/en
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Publication of CN102088745B publication Critical patent/CN102088745B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses a switching pre-processing method, the method comprises the steps as follows: a service base station and/or a terminal receive a cell bar indication message from an adjacent base station of the service base station, wherein the cell bar indication message is used for indicating whether the adjacent base station is in a cell bar state; and the service base station and/or the terminal process the interactive messages in the process of scanning and/or switching according to the cell bar indication message. The switching pre-processing method of the present invention improves base station switching efficiency of a wireless communication system, and reduces the cost of communication as well as the cost of terminal.

Description

The switching pre-processing method
Technical field
The present invention relates to the communications field, in particular to a kind of switching pre-processing method.
Background technology
In the wireless communication system, base station (Base Station abbreviates BS as) is to show the equipment that terminal provides service, carries out radio communication by electromagnetic wave between base station and the terminal.Wireless communication system can provide wireless coverage for the terminal of managing scope definitely by the base station, and this geographic range is called the sub-district.
Usually, wireless communication system is in order to need to dispose the big base station of coverage on a large scale for the user provides radio communication.This base station is commonly referred to macro base station (Macro BS), and the sub-district of its covering is commonly referred to Hong Qu (Macro Cell), and a macro base station maximum can cover the zone of circumference 2-3 kilometer.Simultaneously, wireless communication system is considered demand and the environment for use that the user is different, thereby the base station that some coverages are little, transmitting power is lower is disposed to the user higher-quality radio communication service is provided under some specific environment or scene.These small base stations comprise little base station (Micro BS), little base station (Pico BS) and sub-base stations (Femto BS) (also can be called Home eNodeB, personal base station).
In a wireless communication system that is made of the base station, in order to guarantee service continuity, terminal often need be switched the target approach base station of laying equal stress between the base station in moving process.Fig. 1 is the schematic diagram that switches according to the radio communication system base station of correlation technique, and as shown in Figure 1, terminal A is when the overlay area of sub-base stations A moves to the overlay area of macro base station A, and terminal need switch to macro base station A from sub-base stations A; Similar, when terminal B when the overlay area of macro base station A moves to the overlay area of macro base station B, terminal need switch to macro base station B from macro base station A.
Switching shown in Fig. 1 comprises: the obtaining and measuring of (1) network topology, send the topology information of network by the base station, for terminal provide near the situation of base station, terminal is measured near base station and is reported; (2) initiation of Qie Huaning, terminal and base station judge whether that according to the handoff threshold and the measurement result of default needs trigger switching; (3) carry out switching, finish the mutual of handoff parameter and state information by a series of message between terminal and serving BS and the target BS; (4) network is reentried, and terminal and target BS carry out obtaining the transmission parameter of up-downgoing synchronously, sets up new transfer of data and connects.In order to guarantee service quality, terminal must be controlled expense as far as possible in whole handoff procedure, reduces useless scanning, interacting message and reentry to reduce whole handover overhead and delay.
May be (for example in system base station in service because of some reason, higher or the backhaul of load connect disconnect etc.), the sub-district prohibition information of assisting the superframe head first son bag in a period of time is set to 1, be about to the base station and be set to be in the sub-district illegal state, to prevent terminal this base station that enters during this period or reentry.
At present, processing when terminal and serving BS do not take into full account adjacent base station and be in the sub-district illegal state when switching, and adopt traditional switching handling method can cause terminal attempt to be switched and the network base station that the sub-district forbids of reentrying, cause the terminal handover delay long even call drop occurs, thus the service quality of having a strong impact on.
Summary of the invention
The problem of the long even call drop of the terminal handover delay that causes at when switching, the base station that is in the sub-district illegal state not being handled in the correlation technique and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of switching pre-processing method, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of switching pre-processing method.
Switching pre-processing method according to the present invention comprises: serving BS and/or terminal receive the sub-district of the adjacent base station of serving BS and forbid indication information, and wherein, the sub-district forbids indication information is used to indicate adjacent base station whether to be in the sub-district illegal state; Serving BS and/or terminal according to the sub-district forbid indication information to scanning and/or handoff procedure in interactive messages handle.
Preferably, forbid before the indication information sub-district of serving BS receiving neighbor bs, this method comprises: predetermined network element is forbidden indication information to the sub-district that serving BS sends the adjacent base station of serving BS, wherein, predetermined network element comprises one of following at least: self-organizing network server, terminal, adjacent base station.
Preferably, the sub-district of the adjacent base station of terminal reception serving BS forbids before the indication information that this method also comprises: serving BS and/or adjacent base station send the sub-district of the adjacent base station of serving BS and forbid indication information.
Preferably, serving BS and/or terminal forbid that according to the sub-district indication information handles and comprise interactive messages in scanning and/or the handoff procedure: the information of getting rid of the adjacent base station that is in the sub-district illegal state in interactive messages.
Preferably, serving BS and/or terminal forbid that according to the sub-district indication information handles and comprise interactive messages in scanning and/or the handoff procedure: carry in interactive messages and be used to indicate adjacent base station to be in the indication information of sub-district illegal state.
Preferably, the sub-district of serving BS receiving neighbor bs forbids that indication information comprises: serving BS is received from the message that carries adjacent base station information that the organization network server sends; Serving BS obtains the sub-district of adjacent base station and forbids indication information from the message that carries adjacent base station information.
Preferably, the sub-district of serving BS receiving neighbor bs forbids that indication information comprises: serving BS scans adjacent base station, forbids indication information with the sub-district of receiving neighbor bs.
Preferably, the sub-district of serving BS receiving neighbor bs forbids that indication information comprises: terminal or serving BS initiate to switch; Serving BS sends message to the candidate target base station of switching, and receives the response message from candidate target base station; Serving BS obtains the sub-district of candidate target base station and forbids indication information from response message.
Preferably, serving BS is handled and comprised interactive messages in scanning and/or the handoff procedure: serving BS is got rid of the information of the adjacent base station that is in the sub-district illegal state in one of at least in the following message that sends to terminal: Neighboring Cell List message, scan response message, switching command message.
Preferably, serving BS is handled interactive messages in scanning and/or the handoff procedure and comprised: serving BS carries indication information in the message that sends to terminal, wherein, the message that sends to terminal comprises Neighboring Cell List message, and indication information is used for indicating the adjacent base station of serving BS to be in the adjacent base station of sub-district illegal state.
Preferably, the sub-district of terminal receiving neighbor bs forbids that indication information comprises: terminal scans adjacent base station, forbids indication information with the sub-district that receives each adjacent base station.
Preferably, terminal to adjacent base station scan comprise at least one of following: terminal is selected frequency, and begins the blind search of sweeping; The adjacent base station that serving BS selects needs to scan according to the adjacent base station information of this preservation, and begin to scan; Serving BS send to need the message of information of the adjacent base station of scanning to terminal by the scanning response message, terminal scans the adjacent base station of needs scanning.
Preferably, after indication information was forbidden in the sub-district of terminal receiving neighbor bs, terminal is handled interactive messages in scanning and/or the handoff procedure and comprised: terminal forbade that by the sub-district that scan report message will be in the adjacent base station of sub-district illegal state indication information sends to serving BS.
Preferably, after indication information is forbidden in the sub-district of terminal receiving neighbor bs, terminal is handled interactive messages in scanning and/or the handoff procedure and comprised: terminal sends predetermined message to serving BS, wherein, it is one of following that the information of getting rid of the adjacent base station be in the sub-district illegal state in the predetermined message, predetermined message comprise at least: indication message, scan report message, handoff request message.
Preferably, the sub-district of terminal receiving neighbor bs forbids that indication information comprises: when terminal was reentried at network, indication information was forbidden in the sub-district that receives the target BS of network reentry, and wherein, target BS is one of adjacent base station.
Preferably, forbid that according to the sub-district of target BS Indication message determines that the state of target BS is under the situation of sub-district illegal state in terminal, said method also comprises: terminal definite another base station from the candidate target BS is attempted network as target BS and is reentried, wherein, candidate target base station is the subclass or the set of adjacent base station; If but the candidate target base station that terminal is determined is in access state, then terminal is finished the candidate target base station that network is reentried to and determined.
By the present invention, adopt serving BS and/or terminal in scanning and/or handoff procedure, to receive to be in the adjacent base station information of sub-district illegal state and in interactive messages the sub-district prohibition information to adjacent base station handle, solved the problem of the long even call drop of the terminal handover delay of when switching, in advance the base station that is in the sub-district illegal state not being handled in the correlation technique and causing, and then realized that reliable target BS inserts, thereby improved the radio communication system base station switching efficiency, reduced communication and terminal overheads.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the radio communication system base station switching of correlation technique;
Fig. 2 is the flow chart according to the switching pre-processing method of the embodiment of the invention;
Fig. 3 is the flow chart of according to the automatic lastest imformation that comprises the sub-district prohibition information adjacent base station information being handled according to the base station of the embodiment of the invention;
Fig. 4 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending NBR-ADV message according to the base station of the embodiment of the invention;
Fig. 5 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-RSP message according to the base station of the embodiment of the invention;
Fig. 6 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-CMD message according to the base station of the embodiment of the invention;
Fig. 7 is the flow chart that according to the terminal of the embodiment of the invention adjacent base station is scanned and handles adjacent base station information;
Fig. 8 is the flow chart of according to the SCN-REP message that comprises the sub-district prohibition information that receives adjacent base station information being handled according to the base station of the embodiment of the invention;
Fig. 9 is the flow chart of according to the HO-RSP message of receiving that comprises the sub-district prohibition information adjacent base station information being handled according to the base station of the embodiment of the invention;
Figure 10 directly scans the flow chart that gets access to sub-district illegal state relevant information and handle adjacent base station information according to the base station of the embodiment of the invention to adjacent base station;
Figure 11 is the flow chart of according to the NBR-ADV message of receiving that comprises the sub-district prohibition information adjacent base station information being handled according to the terminal of the embodiment of the invention;
Figure 12 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-REQ message according to the terminal of the embodiment of the invention;
Figure 13 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-REP message according to the terminal of the embodiment of the invention;
Figure 14 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-REQ message according to the terminal of the embodiment of the invention;
Figure 15 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-IND message according to the terminal of the embodiment of the invention;
Figure 16 handles the flow chart of adjacent base station information according to obtaining the sub-district prohibition information that receives according to the terminal of the embodiment of the invention when network is reentried;
Figure 17 is according to the terminal of the embodiment of the invention and target BS and serving BS is mutual determines that suitable target BS carries out the flow chart that network is reentried.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In following examples, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Need to prove, alleged base station can comprise macro base station, little base station, little base station, sub-base stations in following examples, serving BS is meant the base station of the current access of terminal, the sub-district forbids referring to that the prohibition information position, sub-district in the auxilliary superframe head that the base station sends is 1 in following examples, but is not limited thereto.
According to embodiments of the invention, a kind of switching pre-processing method is provided, this method comprises: the sub-district of serving BS and/or terminal receiving neighbor bs is forbidden indication information and is handled, Fig. 2 is the flow chart according to the switching pre-processing method of the embodiment of the invention, as shown in Figure 2, this method comprises the steps:
Step S201, serving BS and/or terminal receive the sub-district of the adjacent base station of this serving BS and forbid indication information, and wherein, the sub-district forbids indication information is used to indicate adjacent base station whether to be in the sub-district illegal state.
Step S202, serving BS and/or terminal are handled interactive messages in scanning and/or the handoff procedure.
Preferably, in step S202, the processing that interactive messages is carried out can be an information of getting rid of the adjacent base station that is in the sub-district illegal state in this message, also can be in this message, to carry the indication information that is used to indicate adjacent base station whether to be in the sub-district illegal state (that is, initiatively indication is in the adjacent base station of sub-district illegal state).
Preferably, serving BS can be by the sub-district illegal state information of following one of at least receiving neighbor bs: serving BS upgrades the information whether adjacent base station is in the sub-district illegal state of obtaining by automatic adjacent section; Serving BS obtains the information whether adjacent base station is in the sub-district illegal state by handoff response (HO-RSP) message that the receiving target base station sends; Serving BS obtains the information whether adjacent base station is in the sub-district illegal state by scan report (SCN-REP) message that receiving terminal sends; Serving BS oneself scans adjacent base station, obtains the information whether adjacent base station is in the sub-district illegal state.
Preferably, terminal can be forbidden indication information by the sub-district of one of following receiving neighbor bs: terminal is by receiving the message that serving BS sends, and for example, Neighboring Cell List (NBR-ADV) message is obtained the information whether adjacent base station is in the sub-district illegal state; Terminal oneself scans adjacent base station, obtains the information whether adjacent base station is in the sub-district illegal state; Terminal receives the information that whether is in the sub-district illegal state as the adjacent base station of target BS when network is reentried.
Preferably, in step S204, serving BS can but be not limited to get rid of in NBR-ADV message, scanning response (SCN-RSP), the switching command (HO-CMD) adjacent base station (that is, eliminating is in the information of the adjacent base station of sub-district illegal state) that is in the sub-district illegal state.
Preferably, in step S204, terminal can but be not limited to scan request (SCN-REQ) message, scan report (SCN-REP) message, handoff request (HO-REQ), switch and get rid of the adjacent base station (that is the information of, getting rid of the adjacent base station that is in the sub-district illegal state) that is in the sub-district illegal state in indication (HO-IND) message.
Preferably, in step S204, serving BS can but be not limited to the adjacent base station that when sending NBR-ADV message to terminal indication is in the sub-district illegal state; Terminal can but be not limited to the adjacent base station that when sending SCN-REP message to serving BS indication is in the sub-district illegal state.
Be described in detail below in conjunction with the implementation procedure of example the embodiment of the invention.
Example 1
In this example, the base station is by the neighborhood between automatic update mechanism maintenance and the peripheral base station, that is, add or break down can't work the time in some base station, finish adjacent-area list renewing by self-organizing network server (SON Server) between the base station as new base station.Because the higher or backhaul of load connects and disconnects and when forbidding that temporarily terminal inserts, the automatic neighbor list that the hoc service device is issued the base station upgrades in the interaction message and should comprise the sub-district prohibition information when adjacent base station.
Fig. 3 is the flow chart of according to the automatic lastest imformation that comprises the sub-district prohibition information adjacent base station information being handled according to the base station of the embodiment of the invention, as shown in Figure 3, after the sub-district prohibition information of adjacent base station is received in the base station, the corresponding adjacent base station information of handling local preservation, this flow process may further comprise the steps:
Step S301: the base station receives the automatic renewal neighbor list information that comprises the sub-district prohibition information;
Step S302: adjacent base station information is handled in the base station, for example, upgrades the sub-district prohibition information of the local adjacent base station of preserving.
When serving BS need send NBR-ADV message, can in NBR-ADV message, not comprise the adjacent base station information that is in the sub-district illegal state, Fig. 4 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending NBR-ADV message according to the base station of the embodiment of the invention, as shown in Figure 4, this flow process may further comprise the steps:
Step S401: the local adjacent base station information of preserving is checked in the base station;
Step S402: get rid of the adjacent base station information that is in the sub-district illegal state when base station sends NBR-ADV message.
After terminal receives that having got rid of the sub-district forbids the NBR-ADV message of adjacent base station, can directly avoid scanning the current adjacent base station that is in the sub-district illegal state, saved time delay for switching and terminal overheads.
Example 2
Serving BS sends after the NBR-ADV message, finds that by automatic update mechanism new adjacent base station having occurred has entered the sub-district illegal state, and serving BS upgrades the local adjacent base station information of preserving accordingly.And terminal has comprised the emerging adjacent base station that enters the sub-district illegal state according to contained adjacent bast station list in the NBR-ADV message of receiving before when sending SCN-REQ message to serving BS during this period.Receive the SCN-REQ message of terminal transmission when the server base station after,, when sending SCN-RSP message, do not comprise the base station that enters the sub-district illegal state according to current up-to-date adjacent base station information.
Fig. 5 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-RSP message according to the base station of the embodiment of the invention, and as shown in Figure 5, this flow process may further comprise the steps:
Step S501: the local adjacent base station information of preserving is checked in the base station;
Step S502: get rid of the adjacent base station information that is in the sub-district illegal state when base station sends SCN-RSP message.
Terminal can directly be avoided scanning the current adjacent base station that is in the sub-district illegal state after receiving and having got rid of the sub-district and forbid the SCN-RSP message of adjacent base station, has saved time delay for switching and terminal overheads.
Example 3
The signal that serving BS is found terminal more and more a little less than, need be switched on other adjacent base stations.Serving BS sends the HO-REQ message request to adjacent base station and switches, and it should be noted that serving BS according to update mechanism is at the up-to-date adjacent base station information of this locality preservation automatically, and HO-REQ message only sends to the current adjacent base station that is not in the sub-district illegal state.After serving BS is selected some candidates' target BS, initiatively initiate to switch.When serving BS sent HO-CMD message to terminal, same, serving BS notes to be got rid of the adjacent base station that is in the sub-district illegal state from HO-CMD message.
Fig. 6 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-CMD message according to the base station of the embodiment of the invention, and as shown in Figure 6, this flow process may further comprise the steps:
Step S601: the local adjacent base station information of preserving is checked in the base station;
Step S602: get rid of the adjacent base station information that is in the sub-district illegal state when base station sends HO-CMD message.
After terminal receives and got rid of the sub-district and forbid the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads saved.
Example 4
Terminal find from the serving BS signal more and more a little less than, need switch on other adjacent base stations and just can work on.Terminal sends HO-REQ message to serving BS and initiatively initiates to switch.After serving BS is received the HO-REQ message of terminal transmission, serving BS sends the HO-REQ message request to adjacent base station and switches, it should be noted that serving BS according to update mechanism is at the up-to-date adjacent base station information of this locality preservation automatically, HO-REQ message only sends to the current adjacent base station that is not in the sub-district illegal state.After serving BS was selected some candidates' target BS, serving BS sent HO-CMD message to terminal, and same, serving BS notes to be got rid of the adjacent base station that is in the sub-district illegal state from HO-CMD message.
Fig. 6 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-CMD message according to the base station of the embodiment of the invention, and as shown in Figure 6, this flow process may further comprise the steps:
Step S601: the local adjacent base station information of preserving is checked in the base station;
Step S602: get rid of the adjacent base station information that is in the sub-district illegal state when base station sends HO-CMD message.
After terminal receives and got rid of the sub-district and forbid the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads saved.
Example 5
Do not support in the base station under the situation of automatic update mechanism that the base station is issued and got rid of the adjacent base station information that is in the sub-district illegal state at present in the NBR-ADV message of terminal and the SCN-RSP message.Terminal scans one by one to the adjacent base station that comprises in the SCN-RSP message after receiving the SCN-RSP message that serving BS sends, and judges whether to satisfy the trigger condition that scanning reports.In addition, terminal also may select frequency carry out blind sweep search adjacent base station or when being in idle mode (Idle Mode) according to before the spontaneous selection adjacent base station of adjacent base station information that receives and the adjacent base station of selecting scanned.If scan certain adjacent base station is to be in the sub-district illegal state at present, and terminal processes is also upgraded the local adjacent base station information of preserving.
Fig. 7 be according to the terminal of the embodiment of the invention to adjacent base station scanning and handle the flow chart of adjacent base station information, as shown in Figure 7, this flow process may further comprise the steps:
Step S701: terminal scans adjacent base station, obtains the information whether adjacent base station is in the sub-district illegal state;
Step S702: terminal processes adjacent base station information.
Then, terminal comprises the adjacent base station information that is in the sub-district illegal state when sending SCN-REP message, and indicates it to be in the sub-district illegal state.After the SCN-REP message that comprises the sub-district prohibition information that terminal sends was received in the base station, the base station was handled the local adjacent base station information of preserving accordingly.
Fig. 8 is the flow chart of according to the SCN-REP message that comprises the sub-district prohibition information that receives adjacent base station information being handled according to the base station of the embodiment of the invention, and as shown in Figure 8, this flow process may further comprise the steps:
Step S801: the base station receives the SCN-REP message that comprises the sub-district prohibition information that terminal is sent;
Step S802: adjacent base station information is handled in the base station.
Scanning according to terminal reports, but if find to have the base station that is in the sub-district illegal state originally to be in the sub-district access state now, or but the fierce fighting that is in the sub-district access state originally is in the sub-district illegal state now, the base station will be upgraded the adjacent base station information of oneself accordingly, and gets rid of the adjacent base station information that is in the sub-district illegal state when switching relevant message such as HO-CMD when the base station need send after this.After terminal receives that having got rid of the sub-district forbids the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads saved.
Example 6
Do not support automatic update mechanism and terminal in SCN-REP message, not to report under the situation that is in illegal state base station, sub-district in the base station, issue in the NBR-ADV message of terminal and the SCN-RSP message in the base station and all to comprise all relevant adjacent base station informations, get rid of the adjacent base station information that is in the sub-district illegal state at present.Same, terminal sends in the SCN-REQ of base station and the SCN-REP message also gets rid of the adjacent base station information that is in the sub-district illegal state.When initiatively initiating to switch when terminal initiatively sends HO-REQ message initiation switching or by the base station, the base station sends HO-REQ message to each possible target BS, by the mutual handover information of backbone network according to the adjacent base station information of oneself preserving.For the base station that is in the sub-district illegal state at present, receive the HO-REQ message of sending other base stations after, the base station directly shows when replying HO-RSP message and lays oneself open to the sub-district illegal state.
When serving BS receive that candidate's target BS sends comprise the HO-RSP message of sub-district prohibition information the time, the corresponding adjacent base station information of handling and upgrading oneself of serving BS, Fig. 9 is the flow chart that according to the HO-RSP message of receiving that comprises the sub-district prohibition information adjacent base station information is upgraded according to the base station of the embodiment of the invention, as shown in Figure 9, this flow process may further comprise the steps:
Step S901: the base station receives the HO-RSP message that comprises the sub-district prohibition information that target BS is sent;
Step S902: adjacent base station information is handled in the base station.
The base station does not comprise the base station that is in the sub-district illegal state when sending HO-CMD message to terminal thereafter.After terminal receives that having got rid of the sub-district forbids the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads saved.
Example 7
The base station can be scanned adjacent base station under some particular case, for example, when sub-base stations can and be in low load model (Low Duty Mode) in initialization adjacent base station is scanned, thereby obtain the information which adjacent base station is in the sub-district illegal state.Sub-base stations is handled and the own local adjacent base station information of preserving of renewal according to scanning result is corresponding.Figure 10 directly scans the flow chart that gets access to sub-district illegal state relevant information and handle adjacent base station information according to the base station of the embodiment of the invention to adjacent base station, and as shown in figure 10, this flow process may further comprise the steps:
Step S1001: the base station is scanned adjacent base station;
Step S1002: the base station obtains the indication information whether adjacent base station is in the sub-district illegal state;
Step S1003: adjacent base station information is handled in the base station.
When serving BS need send NBR-ADV message, do not comprise the adjacent base station information that is in the sub-district illegal state in the message.When the server base station need initiatively send SCN-RSP message to terminal, do not comprise the adjacent base station information (in above-mentioned example, carried out detailed description, and do not repeated them here) that is in the sub-district illegal state in the message.Terminal can directly be avoided scanning the current adjacent base station that is in the sub-district illegal state after receiving and having got rid of the sub-district and forbid the NBR-ADV and SCN-RSP message of adjacent base station, has saved time delay for switching and terminal overheads.
Preferably, sub-base stations can be simultaneously by and target BS between handover information mutual, be in the sub-district illegal state thereby obtain which target BS, sub-base stations does not comprise the base station that is in the sub-district illegal state when sending HO-CMD message to terminal thereafter.After terminal receives that having got rid of the sub-district forbids the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads further saved.
Example 8
The base station is safeguarded adjacent base station information by automatic update mechanism or terminal by the SCN-REP information reporting.When serving BS need send NBR-ADV message, which adjacent base station of pointing out explicit in the message was in the sub-district illegal state.After terminal is received the NBR-ADV message of sending the base station, upgrade the local adjacent base station information of preserving.
Figure 11 is the flow chart of according to the NBR-ADV message of receiving that comprises the sub-district prohibition information adjacent base station information being handled according to the terminal of the embodiment of the invention, and as shown in figure 11, this flow process may further comprise the steps:
Step S1101: terminal receives the NBR-ADV message that comprises the sub-district prohibition information that serving BS is sent;
Step S1102: terminal processes adjacent base station information.
When terminal sends SCN-REQ message to the base station, do not comprise the adjacent base station information that is in the sub-district illegal state in the message.Figure 12 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-REQ message according to the terminal of the embodiment of the invention, and as shown in figure 12, this flow process may further comprise the steps:
Step S1201: terminal is checked adjacent base station information;
Step S1202: get rid of the adjacent base station information that is in the sub-district illegal state when terminal sends SCN-REQ message.
Accordingly, do not comprise the adjacent base station information that is in the sub-district illegal state in the SCN-RSP message that the base station is returned yet.Terminal can directly be avoided scanning the current adjacent base station that is in the sub-district illegal state after receiving that having got rid of the sub-district forbids the SCN-RSP message of adjacent base station, has saved time delay for switching and terminal overheads.
Example 9
Terminal scans one by one to the adjacent base station that comprises in the SCN-RSP message after receiving the SCN-RSP message that serving BS sends, and judges whether to satisfy the trigger condition that scanning reports.If scan certain adjacent base station is to be in the sub-district illegal state at present, and terminal processes is also upgraded the local adjacent base station information of preserving.When sending SCN-REP message, terminal do not comprise the adjacent base station information that is in the sub-district illegal state.
Figure 13 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending SCN-REP message according to the terminal of the embodiment of the invention, and as shown in figure 13, this flow process may further comprise the steps:
Step S1301: terminal is checked adjacent base station information;
Step S1302: get rid of the adjacent base station information that is in the sub-district illegal state when terminal sends SCN-REP message.
When terminal transmission HO-REQ message initiatively triggers switching, do not comprise the adjacent base station that is in the sub-district illegal state in the HO-REQ message.Figure 14 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-REQ message according to the terminal of the embodiment of the invention, and as shown in figure 14, this flow process may further comprise the steps:
Step S1401: terminal is checked adjacent base station information;
Step S1402: get rid of the adjacent base station information that is in the sub-district illegal state when terminal sends HO-REQ message.
After serving BS receives HO-REQ message, accordingly with target BS when mutual and issue in the HO-CMD message of terminal and do not comprise the current base station that is in the sub-district illegal state.After terminal receives that having got rid of the sub-district forbids the HO-CMD message of adjacent base station, the network current adjacent base station that is in the sub-district illegal state of reentrying be can avoid attempting, time delay for switching and terminal overheads saved.
Example 10
When terminal was received the HO-CMD message of serving BS transmission, terminal judged one by one whether the target BS that comprises in the message can insert.Judge whether that the condition that can insert comprises signal to noise ratio (CINR), received signal intensity indication indexs such as (RSSI).Satisfy switching condition if find certain target BS, and terminal is according to the information of the adjacent base station of oneself preserving, the current sub-district illegal state that is not in of this target BS, then terminal sends HO-IND message and informs the target BS that it is chosen to serving BS, Figure 15 gets rid of the flow chart that is in sub-district illegal state adjacent base station information when sending HO-IND message according to the terminal of the embodiment of the invention, as shown in figure 15, this flow process may further comprise the steps:
Step S1501: terminal is checked adjacent base station information;
Step S1502: get rid of the adjacent base station information that is in the sub-district illegal state when terminal sends HO-IND message.
Figure 16 is a flow chart of handling adjacent base station information according to the terminal of the embodiment of the invention when network is reentried according to the sub-district prohibition information that gets access to, and as shown in figure 16, this flow process may further comprise the steps:
Step S1601: terminal is obtained the information whether target BS is in the sub-district illegal state when network is reentried;
Step S1602: terminal processes adjacent base station information.
If terminal finds that when network is reentried the prohibition information position, sub-district of the auxilliary superframe head of target BS is 0, then further finish network re-entry procedure, terminal finds that target BS is in the sub-district illegal state else if, terminal is upgraded adjacent base station information, and continues to judge whether other target BS can insert.If terminal is found all target BS and all can not insert that then terminal transmission HO-IND message indicates all target BS all can't insert to serving BS.
Figure 17 is according to the terminal of the embodiment of the invention and target BS and serving BS is mutual determines that suitable target BS carries out the flow chart that network is reentried, and as shown in figure 17, this flow process may further comprise the steps:
Step S1701, terminal is obtained the HO-CMD information that serving BS sends;
Step S1702, terminal is according to the suitable target BS of indicating in the switching condition selection HO-CMD message;
Step S1703, terminal sends HO-IND message and informs the target BS that its plan is reentried to serving BS;
Step S1704, terminal begins the network target BS of reentrying, and obtains the sub-district prohibition information of this target BS by scanning
Step S1705 if the current goal base station forbids inserting, then enters step S1707, otherwise enters step S1706;
Step S1706, the terminal network target BS of reentrying;
Step S1707, whether terminal judges also has other target BS, if then enter step S1702, otherwise enters step S1708;
Step S1708, terminal sends HO-IND message to serving BS, informs its all target BS of can't reentrying.
In this example, terminal further judges whether target BS is in the sub-district illegal state when network is reentried, and has guaranteed the correct and effective of switching.
In sum, by the foregoing description, serving BS and/or terminal are obtained forbidding relevant indication information with the sub-district and handling accordingly of adjacent base station.Thereby can in handoff procedure, get rid of the sub-district in advance and forbid the target BS that inserts, realize that reliable target BS inserts, thereby improve the radio communication system base station switching efficiency, reduce communication and terminal overheads.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (16)

1. a switching pre-processing method is characterized in that, comprising:
Serving BS and/or terminal receive the sub-district of the adjacent base station of described serving BS and forbid indication information, and wherein, described sub-district forbids indication information is used to indicate described adjacent base station whether to be in the sub-district illegal state;
Described serving BS and/or described terminal according to described sub-district forbid indication information to scanning and/or handoff procedure in interactive messages handle.
2. method according to claim 1 is characterized in that, described serving BS receives the sub-district of described adjacent base station and forbids before the indication information that described method also comprises:
Predetermined network element is forbidden indication information to the sub-district that described serving BS sends the adjacent base station of described serving BS, and wherein, it is one of following that described predetermined network element comprises at least: self-organizing network server, described terminal, described adjacent base station.
3. method according to claim 1 is characterized in that, described terminal receives the sub-district of the adjacent base station of described serving BS and forbids before the indication information that described method also comprises:
Described serving BS and/or described adjacent base station send the sub-district of the adjacent base station of described serving BS and forbid indication information.
4. method according to claim 1 is characterized in that, described serving BS and/or described terminal forbid that according to described sub-district indication information handles and comprise interactive messages in scanning and/or the handoff procedure:
The information of in described interactive messages, getting rid of the adjacent base station that is in the sub-district illegal state.
5. method according to claim 1 is characterized in that, described serving BS and/or described terminal forbid that according to described sub-district indication information handles and comprise interactive messages in scanning and/or the handoff procedure:
In described interactive messages, carry and be used to indicate adjacent base station to be in the indication information of sub-district illegal state.
6. method according to claim 2 is characterized in that, described serving BS receives the sub-district of described adjacent base station and forbids that indication information comprises:
Described serving BS receives the message that carries described adjacent base station information that described self-organizing network server sends;
Described serving BS obtains the sub-district of described adjacent base station and forbids indication information from the described message that carries described adjacent base station information.
7. method according to claim 2 is characterized in that, described serving BS receives the sub-district of described adjacent base station and forbids that indication information comprises:
Described serving BS scans described adjacent base station, forbids indication information with the sub-district that receives described adjacent base station.
8. method according to claim 2 is characterized in that, described serving BS receives the sub-district of described adjacent base station and forbids that indication information comprises:
Described terminal or described serving BS initiate to switch;
Described serving BS sends message to the candidate target base station of switching, and receives the response message from described candidate target base station;
Described serving BS obtains the sub-district of described candidate target base station and forbids indication information from described response message.
9. according to claim 3,4,6,7 or 8 described methods, it is characterized in that described serving BS is handled interactive messages in scanning and/or the handoff procedure and comprised:
Described serving BS is got rid of the information of the adjacent base station that is in the sub-district illegal state in one of at least in the following message that sends to described terminal: Neighboring Cell List message, scan response message, switching command message.
10. according to claim 3,5,6,7 or 8 described methods, it is characterized in that described serving BS is handled interactive messages in scanning and/or the handoff procedure and comprised:
Described serving BS carries described indication information in the message that sends to described terminal, wherein, the message that sends to described terminal comprises Neighboring Cell List message, and described indication information is used for indicating the adjacent base station of described serving BS to be in the adjacent base station of sub-district illegal state.
11. method according to claim 1 is characterized in that, described terminal receives the sub-district of described adjacent base station and forbids that indication information comprises:
Described terminal scans described adjacent base station, forbids indication information with the sub-district that receives each adjacent base station.
12. method according to claim 11 is characterized in that, described terminal to described adjacent base station scan comprise at least one of following:
Described terminal is selected frequency, and begins the blind search of sweeping;
The adjacent base station that described serving BS selects needs to scan according to the adjacent base station information of this preservation, and begin to scan;
Described serving BS sends the message of the information of the adjacent base station that needs scanning by the scanning response message to described terminal, and described terminal scans the described adjacent base station of scanning that needs.
13., it is characterized in that after indication information was forbidden in the sub-district that described terminal receives described adjacent base station, described terminal was handled interactive messages in scanning and/or the handoff procedure and comprised according to claim 11 or 12 described methods:
Described terminal forbids that by the sub-district that scan report message will be in the adjacent base station of sub-district illegal state indication information sends to described serving BS.
14., it is characterized in that after indication information was forbidden in the sub-district that described terminal receives described adjacent base station, described terminal was handled interactive messages in scanning and/or the handoff procedure and comprised according to claim 11 or 12 described methods:
Described terminal sends predetermined message to described serving BS, wherein, it is one of following that the information of getting rid of the adjacent base station be in the sub-district illegal state in the described predetermined message, described predetermined message comprise at least: indication message, scan report message, handoff request message.
15. method according to claim 1 is characterized in that, described terminal receives the sub-district of described adjacent base station and forbids that indication information comprises:
Described terminal is when network is reentried, and indication information is forbidden in the sub-district that receives the target BS of network reentry, and wherein, described target BS is one of described adjacent base station.
16. method according to claim 15 is characterized in that, forbids that according to the sub-district of described target BS Indication message determines that the state of described target BS is under the situation of sub-district illegal state in described terminal, described method also comprises:
Described terminal definite another base station from described candidate target BS is attempted network as target BS and is reentried, and wherein, described candidate target base station is the subclass or the set of described adjacent base station;
If but the candidate target base station that terminal is determined is in access state, then terminal is finished the network described definite candidate target base station of reentrying.
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