CN101562851B - Fast recovery method of multiple preparation district RLFs based on movement pattern and system - Google Patents

Abstract

The present invention proposes a mobile mode-based rapid recovery method for radio link failures in multiple reserve cells, including the following parts: each eNodeB uses a statistical method to record the history of all UEs that have used the eNodeB in an environment where radio link failures and RLFs frequently occur The movement trajectory information is counted to form the regional movement mode information of the eNodeB; the historical movement trajectory information of each UE is used as the context information of the UE and transmitted between different eNodeBs as the UE moves; using the UE The historical movement track information is used to match the regional movement pattern, and multiple eNodeBs to which the UE may move are returned as backup cells. The present invention obtains the regional mobile mode information of the eNodeB by using a statistical method, and selects a set of reserve cells according to the mobile mode information, which greatly improves the success rate of the RLF fast recovery mechanism for multiple reserve cells and reduces the overhead of the RLF recovery mechanism for multiple reserve cells .

Description

Method and system for fast recovery of RLF in multi-preparation cells based on mobile mode

technical field

The present invention relates to the field of mobile communication, in particular to a method and system for fast recovery of radio link failure RLF in a long-term evolution broadband LTE-A system.

Background technique

In the Long Term Evolution LTE system and the Long Term Evolution Broadband LTE-A system, when the user equipment UE is handed over, once the wireless signal of the UE's current serving eNodeB (or source eNodeB) suddenly attenuates, the UE will not be able to complete the normal handover process. The technical specification TS36.300 of 3GPP refers to this situation as radio link failure RLF. RLF is generally divided into uplink measurement report failure and downlink handover command failure. Among them, the failure of the uplink measurement report will cause the source eNodeB to fail to make a handover decision, so that the handover cannot be carried out smoothly, and the failure of the downlink handover command will make the source eNodeB unable to trigger the physical layer handover of the UE. Therefore, the RLF recovery mechanism is introduced in the 3GPP TS36.300 specification, and the RLF recovery process in the LTE system is defined.

The existing RLF recovery mechanism in TS36.300 will cause a large communication recovery delay, mainly due to the following two points: First, during the existing RLF recovery process, the UE needs to read the system information block SIB of the target eNodeB, The time usually required for this process is a uniform distribution of [0 ~ 160ms]; second, in some special cases, the RLF recovery mechanism in TS36.300 will not be able to handle, in these cases, the UE must start from the RRC_IDLE state to The target eNodeB establishes the link, introducing additional interruption delay.

As shown in Figure 1, it is the analysis of RLF interrupt delay. In Figure 1, the time between event A and event D represents the time required for RLF recovery for the UE with the reserve cell; the time between event C and event D represents the time between the UE and the reserve The time for restoring the radio link between the target cells includes the time required for the UE to read the system information block SIB of the target cell and the time for the UE to establish a radio link with the target cell afterwards. From the analysis in the figure, it can be seen that no matter the failure of the uplink measurement report or the failure of the downlink switching command, the process between event C and event D must go through. In fact, the acquisition of the system information of the target cell can be completed in the cell preparation stage. Therefore, pre-reading the SIB information in advance is a key technology to reduce the RLF interruption delay.

In FIG. 1 , the time between event D and event E represents the extra time required for RLF recovery when the UE has no backup cell compared to the case where there is a backup cell. The reason for this extra delay is that when the handover UE does not have a reserve cell, the UE must return to the RRC_IDLE state and re-negotiate the RRC level with the newly arrived target eNodeB to re-establish the radio link. Moreover, during the handover process of the UE, the failure of the uplink measurement report will directly cause the eNodeB to be unable to select the prepared target cell for the UE, so the failure of the uplink measurement report will bring additional interruption delay compared with the failure of the downlink handover command. hour. Therefore, how to minimize the occurrence of UE missing a backup cell is a key technology to reduce RLF interruption delay.

Based on the above analysis, a rapid RLF recovery mechanism with multiple prepared cell sets (Prepared Cell Set) has been proposed. The main idea of this mechanism is that the current serving eNodeB of the UE will select multiple reserve cells for the UE “in advance” before the handover occurs, request these reserve cells to prepare for possible future handover of the UE, and transfer the reserve cell system of these reserve cells to Information, designated bearer and RRC level configuration information inform the UE in advance. Among them, "selecting multiple reserve cells for the UE in advance" does not refer to the process in which the source eNodeB selects reserve cells according to the measurement report and requests these reserve cells to prepare for handover in the handover preparation cut-off in the 3GPP TS36.300 specification, but refers to the source eNodeB Earlier than the actual handover preparation stage, the eNodeB selects multiple reserve cells for the UE according to a reserve cell selection trigger mechanism and requests these reserve cells to prepare for handover in advance. The existing cell preparation trigger mechanism is: if the signal strength of a certain cell currently measured by the UE is higher than a certain threshold, or is lower than the signal strength of the current serving cell of the UE but the difference is less than a certain range, the cell will After being selected as a reserve cell, the current serving cell of the UE can perform a preliminary negotiation process with the reserve cell.

The defect of the existing multi-prepared cell RLF rapid recovery mechanism is that it is inappropriate to use signal strength as the selection criterion of the reserve cell and the trigger mechanism of the cell preparation. This is because RLF mainly occurs in urban environments with high-rise buildings and high-speed trains. In cities with complex wireless environments, the signal strength of a certain measurement cannot reflect the real signal strength between the UE and the cell. ; Moreover, the UE is constantly moving, so the multiple backup cells selected according to the signal strength before the handover may not include the cell to which the UE will move at all. Therefore, a method is needed to solve the above problems.

Contents of the invention

The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially to solve the problem of inaccurate selection when selecting multiple reserve cells based on signal strength.

In order to achieve the above object, the present invention proposes a mobile pattern based multi-preparation cell radio link failure fast recovery method (Mobility Pattern based RLF Recovery Mechanism, MP_RLFRM), which includes the following parts: in the radio link failure RLF multi-issue environment Each eNodeB uses a statistical method to count the historical movement track information of all UEs that have used the eNodeB to form the area movement pattern information of the eNodeB; the historical movement track information of each UE is used as the context information of the UE along with the The movement of the UE is transferred between different eNodeBs; the historical movement track information of the UE is used to match the regional movement pattern, so as to return multiple eNodeBs to which the UE may move as reserve cells. After the UE's current serving eNodeB selects the reserve cells according to the above method, it can return the information of these reserve cells to the UE, and the UE reads the SIB information of the reserve cells in advance, and requests the reserve cells to be used in the future. to prepare for the switchover.

As an embodiment of the present invention, the eNodeB obtains the historical movement track information of the UE, including the following steps: extending the UE context information on the eNodeB to realize the storage of the UE historical movement track on the eNodeB; When a UE handover occurs, the related handover signaling is extended to realize the transfer of the historical movement track of the UE between eNodeBs before and after the handover.

As an embodiment of the present invention, the extending the UE context information includes defining a new mobility history context information Mobility History Context, and defining the maximum length of the Mobility History Context as MAX_MOHIS_NUMBER.

As an embodiment of the present invention, the extending the relevant handover signaling includes: if the handover is an X2-based handover, extending the UE context information information element in the handover request signaling to include The historical mobile information Mobility HistoryContext of the UE; if the handover is based on the S1 type, expand the source-to-target transparent packaging information element in the handover request signaling to include the historical mobile information Mobility of the UE History Context.

As an embodiment of the present invention, the organization form of the regional movement pattern includes a movement history field, a target eNodeB field, a total number field and a statistical probability field. Wherein, the movement history field is the historical movement track of the UE; the target eNodeB field is all the target eNodeBs that the UE may switch to next; the total number field is the UE handover to a certain target eNodeB at the end the total number of times; the statistical probability field is the probability that the UE switches to the certain target eNodeB.

As an embodiment of the present invention, if a UE handover occurs during the formation period of the area mobility pattern, the operation of updating the area mobility pattern information of the source eNodeB will be triggered, including the following steps: the source eNodeB obtains the local context information database Find the historical mobility information list corresponding to the UE; according to the configuration of the source eNodeB, truncate the historical mobility information longer than the threshold Mobility_MAX_LENGTH; the source eNodeB uses the truncated historical mobility information as the key word, match the movement history field in the region movement pattern table, and check whether there is a corresponding region movement pattern rule. If it exists, then continue the update operation; otherwise, add a new rule in which the mobile history field is the historical mobile track of the UE in the mobile pattern table; determine whether there is a target eNodeB in the target eNodeB field of the matched mobile pattern rule . If it exists, continue the update operation; otherwise, add a new target eNodeB field to the entry of the target eNodeB in the mobility mode rule; increase the value of the total number field of the corresponding entry; release the context information of the UE.

As an embodiment of the present invention, the matching criterion followed by using the historical movement track information of the UE to match the movement pattern in the area includes: the longest match and returning only those that satisfy the system's selection accuracy of the reserve cell Multiple required cells are used as reserve cells.

Another aspect of the present invention also proposes a multi-preparation cell wireless link failure rapid recovery system based on mobile mode, including UE and eNodeB. Wherein, the UE is used to pre-read the SIB information of each backup cell returned by the current serving eNodeB, and request the backup cell to prepare for handover; the eNodeB is used to store the historical movement track information of the UE and support the The historical movement track information of the UE is transferred between different eNodeBs, and the regional movement pattern information is formed according to the statistics of a large number of the historical movement track information of the UE, and the historical movement track information is used to match the regional movement pattern , so as to select a plurality of reserve cells meeting system requirements for a certain UE and return the information of the reserve cells to the UE.

As an embodiment of the present invention, the eNodeB includes a storage and transfer module, an area movement pattern calculation module and a matching module. Wherein, the storage and transfer module is used to store the historical movement track information of the UE and support the transfer of the historical movement track information of the UE between different eNodeBs as the UE moves; the regional movement mode The calculation module is used to form area movement pattern information based on the statistics of a large number of historical movement track information of the UE; the matching module is used to use the historical movement track information of the UE to match the area movement pattern, so as to meet the system requirements multiple reserve districts.

The present invention obtains the regional mobile mode information of the eNodeB by using a statistical method, and selects a set of reserve cells according to the mobile mode information, which greatly improves the success rate of the RLF fast recovery mechanism for multiple reserve cells and reduces the overhead of the RLF recovery mechanism for multiple reserve cells .

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of delay analysis of wireless link failure recovery;

Fig. 2 is a switching flow chart based on the X2 type;

FIG. 3 is a flow chart of handover based on the S1 type;

FIG. 4 is a flow chart of updating a movement pattern in a movement pattern formation cycle according to an embodiment of the present invention;

FIG. 5 is a structural diagram of a mobile mode-based rapid recovery system for radio link failures of multiple reserve cells according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

The present invention mainly lies in selecting a plurality of suitable reserve cells for the multi-preparation cell RLF recovery mechanism by using the regional mobility pattern information on the eNodeB by analyzing the characteristics of the RLF multiple transmission environment of LTE-A, and greatly improving the multi-preparation cell RLF fast recovery mechanism The success rate of the multi-preparation cell RLF fast recovery mechanism is reduced at the same time.

In the embodiment of the present invention, on the one hand, the eNodeB needs to collect statistics on the historical movement trajectory information of a large number of UEs it has served to obtain the mobility pattern information; Match to obtain multiple reserve cells for possible future RLF recovery. Therefore, the historical moving track information of the UE is necessary information for realizing MP_RLFRM.

Regarding how the UE’s historical movement track information is stored on the eNodeB and how to efficiently and quickly transmit it between different eNodeBs, the present invention proposes the following method: include the UE’s historical movement track information in the UE’s context information Context In , the transfer is performed between eNodeBs as the UE moves. Specifically, in this embodiment, a new mobility history context Mobility History Context information is defined on each eNodeB supporting MP_RLFRM, and the maximum length of the Mobility History Context is defined as MAX_MOHIS_NUMBER, where the Mobility History Context is the UE context on the eNodeB The newly expanded part is used to store the historical mobile information of the UE on the eNodeB. An eNodeB that supports MP_RLFRM maintains a Mobility History Context instance for each UE it is serving, and each MobilityHistory Context instance is a list of eNodeB identifiers that correspond to UEs that have been used. Whenever a UE switches between eNodeBs, the UE's Mobility History Context will be transferred to the newly accessed eNodeB as context information, and the newly accessed eNodeB will also add its own global eNB identity to the list. If the number of global eNB identifiers in the historical context information is greater than MAX_MOHIS_NUMBER, the ID of the earliest used eNodeB is deleted from the Mobility History Context.

Wherein, for how the Mobility History Context is transferred from the source eNodeB to the target eNodeB during the handover process, this embodiment only uses the Intra E_UTRAN type handover as an example to illustrate. As shown in Figure 2, for X2-based handover, the UE Context Information IE in the HANDOVERREQUEST signaling is expanded to include the historical mobility information Mobility History Context of the UE. As shown in Figure 3, for handover based on S1 type, the Source to Target Transparent Container IE in the handover requirement (HANDOVER REQUIRED) signaling is extended to include the UE's historical mobility information Mobility History Context.

From the above embodiments, it can be seen that the related handover signaling of different handover procedures can be extended to include the historical moving track information of the UE, so that the moving track information of the UE can be transferred between different eNodeBs as the UE moves. The above embodiments are only illustrative embodiments, and do not limit the present invention to be realized only through the above embodiments, and may also be realized through other methods besides the above methods.

Regarding how the eNodeB forms area movement pattern information based on the statistical results of the historical movement track information of the UE, the possible solutions proposed by the present invention are as follows. Of course, those skilled in the art can also propose other modifications or changes according to the following solutions. These modifications or All changes should be included within the scope of the present invention.

As an embodiment of the present invention, the area mobility pattern on the eNodeB is composed of several statistics rules obtained through statistics, wherein each statistics rule is shown in the following table.

Among them, the "Movement History" field is the historical movement track of the UE, the "Target eNodeB" field is all the target eNodeBs that the UE may handover to next, and the "Total" field is the total number of times the UE has handed over to a certain target eNodeB at the end of the statistics. The "statistical probability" field is the probability that the UE will handover to a certain target eNodeB. Then the meaning of this statistical rule is: once the historical movement track of a certain UE matches the part of the "movement history" field, the probability that the target eNodeB of the UE's next possible handover is the eNodeB specified in the "target eNodeB" field is "statistical The corresponding value in the Probability field. Taking the example in the table as an example, if the recent historical movement trajectory of a UE conforms to eNodeB_1→eNodeB_2→eNodeB_3, the probability that the next eNodeB of the UE is eNodeB_4 is $\frac{90}{90+10}=90\%,$ The probability of being eNodeB_5 is $\frac{10}{90+10}=10\%.$ In addition, in order to control the size of the mobility pattern table, the eNodeB will truncate the mobility history whose length is greater than a certain threshold Mobility_MAX_LENGTH. The above examples are illustrative examples only and do not limit the scope of the present invention.

In this embodiment, the eNodeB supporting MP_RLFRM will periodically experience an area mobility pattern forming period. In the formation period of the regional mobile mode, if a certain UE is handed over from eNodeB_B to eNodeB_A, according to the signaling flow shown in Figure 2 and Figure 3, when the handover is about to be completed, the new eNodeB (that is, eNodeB_A) or The UE's source mobility management entity MME will send UE context release signaling to the UE's source eNodeB (ie, eNodeB_B), and this signaling will trigger an area mobility mode information update operation of the eNodeB_B.

As shown in Figure 4, it is a flow chart of the regional mobile mode information update operation of the embodiment of the present invention, including the following steps:

In step S401, the eNodeB_B searches a local context information database for a historical movement information list corresponding to the UE.

Step S402, according to the configuration of eNodeB_B, the historical mobility information longer than the threshold Mobility_MAX_LENGTH is truncated.

In step S403, the eNodeB_B uses the truncated historical movement information as a key to match the "movement history" field in the local area movement pattern table, and checks whether there is a corresponding area movement pattern rule. If it exists, continue to step S404; otherwise, add a new rule in which the "movement history" field is the historical movement track of the UE in the movement pattern table, and then jump to step S406.

Step S404, judging whether eNodeB_A exists in the "target eNodeB" domain of the mobility pattern rule matched in step S403. If it exists, continue to step S405; otherwise, add a new entry whose "target eNodeB" field is eNodeB_A in the mobility mode rule, and then jump to step S406.

Step S405, increase the value of the "Total" field of the corresponding entry.

Step S406, releasing the context information of the UE.

As mentioned above, during the formation period of the regional mobility pattern, each handover of the UE will trigger an update operation of the regional mobility pattern information of its source eNodeB. At the end of the regional mobility pattern formation period, each eNodeB forms a large number of mobility pattern rules, and the eNodeB can calculate the corresponding statistical probability according to the value of the "total number" field in all formed mobility pattern rules. After the period of the regional mobile mode ends, the eNodeB accumulates the mobile mode information through a large amount of UE handover information.

In the embodiment of the present invention, the historical movement information in the UE context information is used to match the local area movement pattern, so as to return the eNodeBs to which multiple UEs may move as reserve cells for the multi-reserve cell RLF recovery mechanism. Specifically, the possible matching schemes proposed by the present invention are as follows. Of course, those skilled in the art can also propose other modifications or changes according to the following schemes, and these modifications or changes should be included within the scope of the present invention.

In the matching process of this embodiment, the eNodeB follows the following two criteria: the longest match and only returning multiple cells that meet the probability requirements as the reserve cells, that is, if the system requires A for the accuracy of reserve cell selection, Then MP_RLFRM returns only a few cells with the highest statistical probability when matching, and makes the cumulative statistical probability value of these cells greater than A. Among them, the longest match is to improve the accuracy of the selection of reserve cells, and only returning multiple cells that meet the probability requirements as reserve cells is to provide as few reserve cells as possible under the premise of ensuring accuracy, so as to reduce the number of reserve cells. Overhead for RLF recovery.

As an embodiment of the present invention, the region movement mode in the following table is taken as an example to describe the matching selection process.

If the historical movement information in the UE context is eNodeB_1, eNodeB_2, eNodeB_3, then eNodeB_1, eNodeB_2, eNodeB_3 and eNodeB_2, eNodeB_3 in the "mobility history" field in the table all match with it, but according to the longest matching rule, select eNodeB_1, eNodeB_2, The statistical rules of eNodeB_3 are used as the basis for the selection of the reserve cell. If the system requires 85% of the accuracy of reserve cell selection, only eNodeB_4 is selected as the reserve cell to meet the system requirements; if the system requires 95% of reserve cell selection accuracy, eNodeB_4 and eNodeB_5 are selected as reserve cells. It should be understood that the above examples are only illustrative examples and do not limit the scope of the present invention.

With regard to the above embodiments, the present invention also proposes a fast recovery system. As shown in FIG. 5 , it is a structural diagram of a mobile mode-based rapid recovery system for radio link failures of multiple spare cells according to an embodiment of the present invention. The system includes UE100 and eNodeB200. The UE 100 is used for pre-reading the SIB information of each reserve cell returned by the current serving eNodeB, and requesting these reserve cells to prepare for handover. The eNodeB200 is used to store the historical movement track information of the UE100 and support the transfer of the historical movement track information of the UE100 between different eNodeB200s, and form regional movement pattern information according to the statistics of a large number of historical movement track information of the UE100, and use the historical movement track information The information is matched with the regional movement pattern, so as to select a plurality of reserve cells meeting the system requirements for a certain UE100 and return the information of these reserve cells to the UE100.

In the embodiment of the present invention, eNodeB 200 includes a storage and transfer module 210 , an area movement pattern calculation module 220 and a matching module 230 . The storage and transfer module 210 is configured to store the historical movement track information of the UE 100 and support the transfer of the historical movement track information of the UE 100 between different eNodeBs 200 . The regional movement pattern calculation module 220 is used to form regional movement pattern information based on the statistics of a large amount of historical movement trajectory information. The matching module 230 is configured to use the historical movement trajectory information to match the regional movement pattern to obtain a plurality of reserve cells that meet the system requirements.

The present invention obtains the regional mobile mode information of the eNodeB by using a statistical method, and selects a set of reserve cells according to the mobile mode information, which greatly improves the success rate of the RLF fast recovery mechanism for multiple reserve cells and reduces the overhead of the RLF recovery mechanism for multiple reserve cells .

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. the many preparation district radio link inefficacy quick recovery method based on Move Mode is characterized in that, comprises with the lower part:

Each eNodeB under the multiple environment of Radio Link inefficacy RLF uses statistical method that the historical movement path information of all UE of using this eNodeB is added up, and forms the regional Move Mode information of this eNodeB;

The historical movement path information of each described UE as the contextual information of UE along with moving between different eNodeB of described UE transmitted;

Use the historical movement path information of described UE to remove to mate described regional Move Mode, return eNodeB that a plurality of described UE may move to as preparation district;

Wherein, the organizational form of described regional Move Mode comprises mobile historical territory, the target eNode B territory, and total number field and statistical probability territory,

Described mobile historical territory is the historical movement path of UE;

Described target eNode B territory, all target eNode B that may switch for the UE next one;

Described total number field, when finishing for described statistics, UE switches to the total degree of a certain target eNode B;

Described statistical probability territory switches to the probability of described a certain target eNode B for UE.

2. the many preparation district radio link inefficacy quick recovery method based on Move Mode as claimed in claim 1 is characterized in that described eNodeB is known the historical movement path information of UE, may further comprise the steps:

UE contextual information on the described eNodeB is expanded, realized the storage of historical movement path information on described eNodeB of described UE;

When the UE switching takes place when, relevant hand off signaling is expanded, realize that the historical movement path information of described UE is transmitted between the eNodeB that switches front and back.

3. the many preparation district radio link inefficacy quick recovery method based on Move Mode as claimed in claim 2, it is characterized in that, described the UE contextual information is expanded, comprise new mobile historical context information Mobility History Context of definition, and the maximum length that defines described Mobility History Context is MAX_MOHIS_NUMBER.

4. the many preparation district radio link inefficacy quick recovery method based on Move Mode as claimed in claim 3 is characterized in that, described relevant hand off signaling is expanded comprises:

If the UE contextual information unit in handoff request (HANDOVERREQUEST) signaling is then expanded in the described switching that switches to based on the X2 type, make it comprise the historical mobile message Mobility History Context of described UE;

If the described switching that switches to based on the S1 type, target transparent wrapper information unit is arrived in the source of then expanding in switching demand (HANDOVERREQUIRED) signaling, makes it comprise the historical mobile message Mobility History Context of described UE.

5. the many preparation district radio link inefficacy quick recovery method based on Move Mode as claimed in claim 1, it is characterized in that, in the formation cycle of described regional Move Mode, if UE takes place to be switched, will trigger the regional Move Mode information update operation of source eNodeB, may further comprise the steps:

Step 1, described source eNodeB searches the historical mobile message tabulation corresponding to described UE from the contextual information database of this locality;

Step 2 according to the configuration of described source eNodeB, will be longer than the historical mobile message brachymemma of a threshold value Mobility_MAX_LENGTH, and wherein, threshold value Mobility_MAX_LENGTH is the maximum length of described Mobility History Context;

Step 3, described historical mobile message after the described source eNodeB use brachymemma mates the mobile historical territory in the described regional Move Mode information as keyword, checks whether have corresponding regional Move Mode rule, if exist, then continue to upgrade operation; Otherwise adding mobile historical territory in described Move Mode information is the new regulation of the historical movement path of described UE; Jump to step 6;

Step 4 judges in the target eNode B territory of the described Move Mode rule that matches whether have target eNode B, if exist, then continues step 5; Otherwise adding new target eNode B territory in described Move Mode rule is the list item of target eNode B; Jump to step 6;

Step 5 increases the value of total number field of described corresponding list item;

Step 6 discharges the contextual information of described UE.

6. the many preparation district radio link inefficacy quick recovery method based on Move Mode as claimed in claim 1 is characterized in that, the described UE historical movement path information of described use goes to mate the matching criterior that described regional Move Mode is followed, and comprising:

The longest coupling;

Only return and satisfy system and described preparation district is selected a plurality of sub-districts of demand of accuracy rate as preparation district.

7. the many preparation district radio link inefficacy quick recovery system based on Move Mode is characterized in that, comprises UE and eNodeB,

Described UE is used for reading in advance the information of the system information block SIB of each preparation district that current service eNodeB returns, and asks these preparation district to switch preparation;

Described eNodeB, be used to the transmission of historical movement path information between different eNodeB of storing the historical movement path information of described UE and supporting described UE, and form regional Move Mode information according to statistics to the historical movement path information of a large amount of described UE, and use described historical movement path information to remove to mate described regional Move Mode, thereby, and the information of described preparation district is returned to described UE for certain UE selects to satisfy a plurality of preparation district of system requirements;

Wherein, the organizational form of described regional Move Mode comprises mobile historical territory, the target eNode B territory, and total number field and statistical probability territory,

Described mobile historical territory is the historical movement path of UE;

Described target eNode B territory, all target eNode B that may switch for the UE next one;

Described total number field, when finishing for described statistics, UE switches to the total degree of a certain target eNode B;

Described statistical probability territory switches to the probability of described a certain target eNode B for UE.

8. the many preparation district radio link inefficacy quick recovery system based on Move Mode as claimed in claim 7 is characterized in that, described eNodeB comprises storage and shift module, regional Move Mode computing module and matching module,

Described storage and shift module are used to the historical movement path information of storing the historical movement path information of described UE and supporting described UE the transmission between different eNodeB of moving along with UE;

Described regional Move Mode computing module is used for forming regional Move Mode information according to the statistics to the historical movement path information of a large amount of described UE;

Described matching module is used to use the historical movement path information of described UE to remove to mate described regional Move Mode, is met a plurality of preparation district of system requirements.

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