CN103747471A - Method for recovering wireless link and wireless terminal - Google Patents

Abstract

The present invention provides a wireless link recovery method and a wireless terminal. The method includes: when a wireless link problem is detected, judging whether Rs is greater than a first preset value, and when the judgment is yes, enabling the T310 timer; when the judgment is no, further judge whether ΔM is greater than its corresponding preset threshold value, if the judgment is no, then enable the T310 timer agreed with the base station, if the judgment is yes, then set the timer according to ΔM coefficient α, and adjust the T310 timer agreed with the base station according to α, and start the adjusted T310 timer; where, M is one of Rs, Rn or Rns. In the present invention, T310 timers with different lengths can be set according to changes in the wireless environment, and can be better applied to different wireless environments.

Description

A wireless link recovery method and wireless terminal

technical field

The present invention relates to the field of communication technology, in particular to a wireless link recovery method and a wireless terminal.

Background technique

In order to cope with the exponentially growing mobile data volume in the network, ensure the service quality requirements of different users, and improve network capacity, small cells are deployed in hotspots and edge areas in heterogeneous networks. Compared with the traditional homogeneous network, the heterogeneous network will deploy small cells according to the data demand in different regions. For example, the number of mobile users in the city business center is large, and the amount of business data is huge. Network operators can deploy dense small cells in this hotspot area. A cell provides services to users. Therefore, the heterogeneous network is no longer a coverage-limited network, however, users in small cells may suffer from strong interference from neighboring nodes and will be more prone to wireless link failure. Therefore, in order to provide stable services to users in heterogeneous networks and ensure user mobility, it is necessary for us to study wireless link recovery schemes in heterogeneous networks.

When the user signal is subject to strong interference or deep attenuation, the user equipment will detect the occurrence of wireless link failure. The failure of the wireless link leads to the interruption of service transmission. During this period, the terminal cannot send or receive any data service. However, prolonged connection interruptions can negatively impact the application layer, degrading the user experience.

A radio link failure can be considered a "physical layer outage". According to the definition in Section 7.6.1 of TS 36.133, wireless link monitoring is implemented based on cell-specific Reference Signal (CRS). In order to monitor the link quality of the downlink channel, the terminal estimates the channel quality according to the calculated SIR of the CRS, and compares it with the preset reference thresholds Qout and Qin. If the measured value is lower than Qout, the terminal assumes that the current link is in an out-of-sync state, and the terminal considers that a radio link problem (Radio Link Problem, RLP) has been detected, and triggers the T310 timer. T310 is used to prevent the terminal from frequently announcing radio link failures (Radio Link Failure, RLF). If the terminal fails to recover from the out-of-sync state before T310 times out, the terminal declares that a wireless connection failure has occurred.

In the process of implementing the present invention, the inventors of the present application found that in the prior art, when a wireless terminal detects a wireless link problem, it always sets a standard T310 timer, which is not universally applicable to different wireless environments.

Contents of the invention

The invention provides a wireless link recovery method and a wireless terminal, which can start T310 timers with different lengths according to the change of the wireless environment, and can be better applied to different wireless environments.

The present invention provides a wireless link recovery method, the method comprising:

When a wireless link problem is detected, it is judged whether Rs is greater than the first preset value, and when the judgment is yes, the T310 timer agreed with the base station is enabled; when the judgment is no, it is further judged whether ΔM is greater than its corresponding preset value Set the threshold value, if the judgment is no, start the T310 timer agreed with the base station, if the judgment is yes, set the timer coefficient α according to ΔM, and adjust the T310 timer agreed with the base station according to α, and start the adjusted T310 timer;

Among them, M is one of Rs, Rn or Rns, when M is Rs, ΔM is the ratio of the decline of M to the number of measurements in the first time, when M is Rn or Rns, ΔM is the first time Rs is the link quality of the serving cell, Rn is the link quality of the neighboring cell, Rns is the difference obtained by subtracting Rs from Rn, the set timer coefficient α is less than 1, and Negatively correlated with ΔM.

Preferably, after the ΔM sets the timer coefficient α, before adjusting the T310 timer agreed with the base station according to α, the method further includes:

Adjusting the timer coefficient α according to N, wherein the timer coefficient α is positively correlated with N; and/or,

Adjusting the timer coefficient α according to Q, wherein the timer coefficient α is negatively correlated with Q;

The adjustment of the T310 timer agreed with the base station according to α specifically includes:

Adjust the T310 timer agreed with the base station according to the adjusted α;

Where N is the number of neighboring cells whose link quality detected by the wireless terminal is greater than the handover threshold, and Q is the service delay sensitivity of the wireless terminal.

Preferably, said judging whether Rs is greater than the first preset value can be replaced by:

It is judged whether Rs-Rn is greater than a second preset value.

Preferably, after enabling the T310 timer, the method further includes:

Step S1, when it is detected that the T310 timer expires, judge whether the link quality of at least one cell is greater than the handover threshold value, if it is judged to be yes, execute step S2, if judged to be no, execute step S9;

Step S2, judging whether the cell with the best link quality among the cells whose link quality is greater than the handover threshold is the serving cell, if so, execute step S3, if not, execute step S6;

Step S3, judging whether ΔRs, ΔRn, and ΔRns are all smaller than their corresponding preset threshold values, if so, execute step S5, if not, execute step S4;

Step S4, extending the T310 timer;

Step S5, re-establishing the connection to the serving cell;

Step S6, judging whether the number of cells whose link quality is greater than the handover threshold is greater than a third preset value, and if it is judged yes, execute step S7, and when judged no, execute step S8;

Step S7, re-establishing the connection to the macro cell where the serving cell is located;

Step S8, establishing a connection to the neighbor cell with the best link quality;

Step S9, judging that both ΔRn and ΔRns are smaller than their corresponding preset threshold values, if yes, execute step S7, if not, execute step S4.

Preferably, the step S4 can be replaced by:

Step S4', judging whether the service delay sensitivity Q corresponding to the wireless terminal is greater than a preset value, if yes, execute step S7, if not, extend the T310 timer.

The present invention also provides a wireless terminal, including:

The T310 setting module is used to determine whether the Rs is greater than the first preset value when a wireless link problem is detected, and when the judgment is yes, enable the T310 timer agreed with the base station; when the judgment is no, further judge ΔM Whether it is greater than its corresponding preset threshold value, if it is judged to be no, start the T310 timer agreed with the base station, if it is judged to be yes, set the timer coefficient α according to ΔM, and adjust the T310 timing agreed with the base station according to α , enable the adjusted T310 timer;

Among them, M is one of Rs, Rn or Rns, when M is Rs, ΔM is the ratio of the decline of M to the number of measurements in the first time, when M is Rn or Rns, ΔM is the first time Rs is the link quality of the serving cell, Rn is the link quality of the neighboring cell, Rns is the difference obtained by subtracting Rs from Rn, the set timer coefficient α is less than 1, and Negatively correlated with ΔM.

Preferably, the T310 setting module is specifically used for:

Adjust the timer coefficient α according to N, wherein the timer coefficient α is positively correlated with N, and/or adjust the timer coefficient α according to Q, wherein the timer coefficient α is negatively correlated with Q; and according to α adjusts the T310 timer agreed with the base station;

Where N is the number of neighboring cells whose link quality detected by the wireless terminal is greater than the handover threshold, and Q is the service delay sensitivity of the wireless terminal.

Preferably, said judging whether Rs is greater than the first preset value can be replaced by:

It is judged whether Rs-Rn is greater than a second preset value.

Preferably, the wireless terminal also includes:

Timeout processing module, used to execute:

Step S1, when it is detected that the T310 timer expires, judge whether the link quality of at least one cell is greater than the handover threshold value, if it is judged to be yes, execute step S2, if judged to be no, execute step S9;

Step S2, judging whether the cell with the best link quality among the cells whose link quality is greater than the handover threshold is the serving cell, if so, execute step S3, if not, execute step S6;

Step S3, judging whether ΔRs, ΔRn, and ΔRns are all smaller than their corresponding preset threshold values, if so, execute step S5, if not, execute step S4;

Step S4, extending the T310 timer;

Step S5, re-establishing the connection to the serving cell;

Step S6, judging whether the number of cells whose link quality is greater than the handover threshold is greater than a third preset value, and if it is judged yes, execute step S7, and when judged no, execute step S8;

Step S7, re-establishing the connection to the macro cell where the serving cell is located;

Step S8, establishing a connection to the neighbor cell with the best link quality;

Step S9, judging that both ΔRn and ΔRns are smaller than their corresponding preset threshold values, if yes, execute step S7, if not, execute step S4.

Preferably, the step S4 can be replaced by:

Step S4', judging whether the service delay sensitivity Q corresponding to the wireless terminal is greater than a preset value, if yes, execute step S7, if not, extend the T310 timer.

In the radio link recovery method provided by the present invention, when a radio link problem is detected, if it is judged that the link quality of the serving cell is better than a first preset value or the signal instruction of the serving cell is equal to the link quality of the neighbor cell If the difference is greater than a second preset value, or although neither of them is greater than the corresponding preset value, but the corresponding link quality changes slowly, start a T310 timer with a standard duration (the T310 timing agreed with the base station device), because in practical applications, the wireless terminal generally recovers quickly from the wireless link problem in the above situation, so there is no need to change the duration of the T310 timer. On the other hand, if the wireless terminal does not meet the above conditions when the wireless link problem occurs, then the wireless terminal is likely to be difficult to recover from the wireless link problem. At this time, in the present invention, a T310 timer that is less than the standard duration is enabled , so that the wireless terminal can recover quickly. At the same time, in the present invention, before starting the T310 timer shorter than the standard duration, the length of the T310 timer is also determined according to the speed of the link quality change, so that the wireless terminal can recover quickly when the link quality deteriorates quickly.

Description of drawings

FIG. 1 is a schematic flowchart of a wireless link recovery method provided in Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of a wireless link recovery method provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a wireless terminal provided by Embodiment 3 of the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

The present invention provides a wireless link recovery method, as shown in Figure 1, the method includes:

Step 101 , when a wireless link problem is detected, it is judged whether Rs is greater than a first preset value, if it is judged yes, go to step 102 , if it is judged no, go to step 103 .

Step 102, start the T310 timer agreed with the base station.

Step 103 , judging whether ΔM is greater than its corresponding preset threshold value, if it is judged no, go to step 102 ; if it is judged yes, go to step 104 .

Step 104, setting the timer coefficient α according to ΔM, adjusting the T310 timer agreed with the base station according to α, and starting the adjusted T310 timer.

Among them, M is one of Rs, Rn or Rns, when M is Rs, ΔM is the ratio of the decline of M to the number of measurements in the first time, when M is Rn or Rns, ΔM is the first time Rs is the link quality of the serving cell, Rn is the link quality of the neighboring cell, Rns is the difference obtained by subtracting Rs from Rn, the set timer coefficient α is less than 1, and Negatively correlated with ΔM.

It should be pointed out that the first preset value involved in the present invention, the preset threshold value corresponding to each parameter, the second preset value, the third preset value, and the first preset time can all be determined by the technician according to the actual situation. Any setting is required.

Those skilled in the art can connect, adjusting the T310 timer according to the timer coefficient refers to multiplying the T310 timer (the duration) by the corresponding timer coefficient, and then determining the length of the new T310 timer according to the product (for example, the product is used as new timer, or add a preset value to the product as the length of the new timer).

In the radio link recovery method provided by the present invention, when a radio link problem is detected, if it is judged that the link quality of the serving cell is better than a first preset value or the signal instruction of the serving cell is equal to the link quality of the neighbor cell If the difference is greater than a second preset value, or although neither of them is greater than the corresponding preset value, but the corresponding link quality changes slowly, start a T310 timer with a standard duration (the T310 timing agreed with the base station device), because in practical applications, the wireless terminal generally recovers quickly from the wireless link problem in the above situation, so there is no need to change the duration of the T310 timer. On the other hand, if the wireless terminal does not meet the above conditions when a wireless link problem occurs, the wireless terminal may be difficult to recover from the wireless link problem. At this time, a T310 timer that is less than the standard duration is enabled to make the wireless terminal Terminal recovers quickly. At the same time, in the present invention, before starting the T310 timer shorter than the standard duration, the length of the T310 timer is also determined according to the speed of the link quality change, so that the wireless terminal can recover quickly when the link quality deteriorates quickly.

Preferably, after step 104, the method further includes:

Adjusting the timer coefficient α according to N, wherein the timer coefficient α is positively correlated with N; and/or,

Adjusting the timer coefficient α according to Q, wherein the timer coefficient α is negatively correlated with Q;

The adjustment of the T310 timer agreed with the base station according to α specifically includes:

Adjust the T310 timer agreed with the base station according to the adjusted α.

Among them, N is the number of neighboring cells whose link quality detected by the wireless terminal is greater than the handover threshold value. The measured number of better cells N reflects the density of small cells in the area where the terminal is located. For areas with dense small cells, the terminal can search The number N of better cells obtained is relatively large. In order to avoid frequent serving cell changes and ensure the terminal’s service quality, when a wireless link problem occurs, T310 can be appropriately increased to allow the terminal to connect to a suitable cell. district.

The handover threshold value here is consistent with the understanding in the prior art. After the wireless terminal determines that the link quality of a certain cell is greater than the handover threshold value, it can establish a connection to the cell.

Q is the terminal service delay sensitivity, the larger the Q value, the higher the sensitivity, and the sensitivity is inversely proportional to the value of T310. In this way, the waiting time of users who have higher requirements on terminal services can be reduced.

Preferably, in any of the above embodiments, step 101 can be replaced by:

Step 101', when a wireless link problem is detected, it is judged whether Rs-Rn is greater than a second preset value.

In practical applications, if Rs is greater than a certain preset value (the first preset value), or Rs-Rn is greater than a certain preset value (the second preset value), the link quality between the wireless terminal and the serving cell remains the same. Preferably, the wireless link problem is only temporary, and the terminal may recover from the out-of-sync state soon. Therefore, the terminal uses the T310 timer agreed with the base station to wait for the link to recover itself.

Preferably, after step 104, if the TTT timer is overtime when the T310 timer is running, it means that the signal quality of the adjacent cell measured by the wireless terminal is better than that of the serving cell for a period of time, and the conditions for cell change are mature. In this case, The terminal terminates T310 immediately, and the neighboring cell corresponding to the TTT performs RRC connection re-establishment.

If T310 times out, the terminal declares that the radio link fails, and then needs to select a suitable cell for the RRC connection re-establishment process. If the terminal is not connected to a suitable cell, radio link failure may occur again, further increasing the service interruption time. Therefore, the terminal needs to comprehensively consider the current wireless link measurement results and the type of service being transmitted/received to select an appropriate link recovery method. Specifically, when the T310 timer expires, the wireless link recovery method provided by the present invention can be as shown in the figure 2 shown includes:

Step 201, when detecting that the T310 timer expires, judge whether the link quality of at least one cell is greater than the handover threshold value, if it is judged to be yes, execute step 202, if judged to be no, execute step 209;

Step 202, judging whether the cell with the best link quality in each cell whose link quality is greater than the handover threshold value is the serving cell, if so, execute step 203, if not, then execute step 206;

Step 203, judging whether ΔRs, ΔRn and ΔRns are all smaller than their corresponding preset threshold values, if so, execute step 205, if not, execute step 204;

Step 204, extend the T310 timer.

If it is judged whether the cell with the best link quality among the cells whose link quality is greater than the handover threshold is the serving cell, and at least one of ΔRs, ΔRn, and ΔRns is greater than its corresponding preset threshold value, then the serving cell The link quality of the service cell decreases rapidly or the link quality of the serving cell increases rapidly. At this time, the terminal extends the T310 timer to the preset value and does not perform handover or reconnection temporarily. deterioration, thereby rendering reconnection useless.

Step 205, re-establish the connection to the serving cell.

If ΔRs, ΔRn, and ΔRns are all smaller than the preset threshold value corresponding to each word, it means that the link quality of the serving cell decreases slowly or the link quality of the serving cell increases slowly, and because the link quality of the serving cell is the best , the wireless terminal performs an RRC connection re-establishment process with the serving cell.

Step 206, judging whether the number of cells whose link quality is greater than the handover threshold is greater than a third preset value, and if it is judged yes, execute step 207, and if judged no, execute step 208.

Step 207, re-establish the connection to the macro cell where the serving cell is located.

If the terminal finds multiple neighboring cells with better quality, and the number of good neighboring cells exceeds a threshold, it means that the terminal is in an area where small cells are densely deployed. Selecting a small cell for reconnection may cause the terminal to perform frequent Therefore, the terminal chooses to re-establish the RRC connection with the macro cell where the original small cell is located.

Step 208, establishing a connection to the neighbor cell with the best link quality.

If only a small number of neighbor cells are found, the neighbor cell with the best quality among the neighbor cells is selected to establish a connection.

Step 209 , judging that both ΔRn and ΔRns are smaller than their corresponding preset thresholds, if yes, execute step 207 , if not, execute step 204 .

If the wireless terminal does not find a cell with better quality according to the measurement results, but the signal quality of one or several cells continues to increase, satisfying that ΔRn is greater than the corresponding preset threshold, or ΔRns is greater than the corresponding preset threshold limit value, the wireless terminal thinks that in a short period of time, the terminal can wait for a better cell to perform the RRC connection reestablishment process, and the terminal appropriately prolongs the T310 timer based on the T310 configuration principle, which can avoid the frequent handover of the terminal between several cells . Otherwise, the terminal re-establishes the RRC connection with the macro cell where the original small cell is located.

Preferably, the step 204 is replaced by:

Step 204', judging whether the service delay sensitivity Q corresponding to the wireless terminal is greater than a preset value, if yes, execute step 207, if not, extend the T310 timer.

In this way, if the delay sensitivity of the user is high in practical applications, no matter whether ΔRn and ΔRns are greater than their corresponding preset values, the connection to the macro cell where the serving cell is located should be re-established immediately.

Preferably, in the above-described embodiment, after step 201 and before step 202, if it is judged in step 201 that the link quality of a plurality of cells is greater than the handover threshold, the T310 timer can also be used to determine that the link quality is greater than the handover threshold Whether the link quality of the sub-district with the best link quality in each sub-district is significantly greater than the link quality of the second-best sub-district, and when it is judged to be yes, perform step 202, if it is judged to be no, then directly perform step 202 207.

Based on the same idea, Embodiment 3 of the present invention also provides a wireless terminal, as shown in FIG. 3 , the wireless terminal includes:

The T310 setting module 301 is used to judge whether the Rs is greater than the first preset value when a wireless link problem is detected, and when it is judged to be yes, enable the T310 timer agreed with the base station; when it is judged to be no, further judge Whether ΔM is greater than its corresponding preset threshold value, if the judgment is no, start the T310 timer agreed with the base station, if the judgment is yes, set the timer coefficient α according to ΔM, and adjust the T310 timer agreed with the base station according to α Timer, enable the adjusted T310 timer;

Among them, M is one of Rs, Rn or Rns, when M is Rs, ΔM is the ratio of the decline of M to the number of measurements in the first time, when M is Rn or Rns, ΔM is the first time Rs is the link quality of the serving cell, Rn is the link quality of the neighboring cell, Rns is the difference obtained by subtracting Rs from Rn, the set timer coefficient α is less than 1, and Negatively correlated with ΔM.

Preferably, the T310 setting module is specifically used for:

Adjust the timer coefficient α according to N, wherein the timer coefficient α is positively correlated with N, and/or adjust the timer coefficient α according to Q, wherein the timer coefficient α is negatively correlated with Q; according to the adjusted α adjusts the T310 timer agreed with the base station; where N is the number of neighbor cells whose link quality detected by the wireless terminal is greater than the handover threshold, and Q is the service delay sensitivity of the wireless terminal.

Preferably, the judging whether Rs is greater than a first preset value may be replaced by: judging whether Rs-Rn is greater than a second preset value.

Preferably, as shown in Figure 3, the wireless terminal may also include:

The overtime processing module 302 is used to execute:

Step 201, when the wireless terminal detects that the T310 timer expires, judge whether the link quality of at least one cell is greater than the handover threshold, if it is judged to be yes, execute step 202, if it is judged to be no, execute step 209;

Step 202, judging whether the cell with the best link quality among the cells whose link quality is greater than the handover threshold is the serving cell, if so, execute step 203, if not, execute step 206;

Step 203, judging whether ΔRs, ΔRn and ΔRns are all smaller than their corresponding preset threshold values, if so, execute step 205, if not, execute step 204;

Step 204, extend the T310 timer;

Step 205, re-establish the connection to the serving cell;

Step 206, judging whether the number of cells whose link quality is greater than the handover threshold value is greater than a third preset value, and if it is judged to be yes, perform step 207, and when it is judged to be no, perform step 208;

Step 207, re-establishing the connection to the macro cell where the serving cell is located;

Step 208, establishing a connection to the neighbor cell with the best link quality;

Step 209 , judging that both ΔRn and ΔRns are smaller than their corresponding preset thresholds, if yes, execute step 207 , if not, execute step 204 .

Preferably, the step 204 can be replaced by:

Step 204', judging whether the service delay sensitivity Q corresponding to the wireless terminal is greater than a preset value, if yes, execute step 207, if not, extend the T310 timer.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. a wireless link recovery method, is characterized in that, described method comprises:

When radio link problem being detected, judge whether Rs is greater than the first preset value, and when being judged as YES, enable the T310 timer with base station agreement; When being judged as NO, further judge whether Δ M is greater than its corresponding predetermined threshold value, if be judged as NO, enable the T310 timer with base station agreement, if be judged as YES, according to Δ M, timer factor alpha is set, and adjusts the T310 timer of arranging with base station according to α, enable the T310 timer after adjustment;

Wherein, M is a kind of in Rs, Rn or Rns, when M is Rs, Δ M is the fall and the ratio of measuring number of times of M within the very first time, when M is Rn or Rns, Δ M is the ascensional range and the ratio of measuring number of times of M in the very first time, Rs is the link-quality of Serving cell, the link-quality that Rn is adjacent cell, and Rns is that Rn deducts the difference that Rs obtains, the timer factor alpha arranging is less than 1, and with Δ M negative correlation.

2. the method for claim 1, is characterized in that, after described Δ M arranges timer factor alpha, before adjusting the T310 timer of arranging with base station according to α, described method also comprises:

According to N, adjust timer factor alpha, wherein, described timer factor alpha and N positive correlation; And/or,

According to Q, adjust timer factor alpha, wherein, described timer factor alpha and Q negative correlation;

The described T310 timer of arranging with base station of adjusting according to α, specifically comprises:

According to the α after adjusting, adjust the T310 timer of arranging with base station;

Wherein N is the number that link-quality that wireless terminal detects is greater than the neighbor cell of handoff threshold value, the service delay susceptibility that Q is wireless terminal.

3. the method for claim 1, is characterized in that, whether the described Rs of judgement is greater than the first preset value, is replaceablely:

Judge whether Rs-Rn is greater than the second preset value.

4. the method for claim 1, is characterized in that, after enabling T310 timer, described method also comprises:

Step S1, when T310 timer expiry being detected, judges whether that the link-quality of at least one community is greater than handoff threshold value, if be judged as YES, and execution step S2, if be judged as NO, execution step S9;

Step S2, judges whether each top-quality community of community link that link-quality is greater than handoff threshold value is Serving cell, if perform step S3, if not, performs step S6;

Step S3, judges whether Δ Rs, Δ Rn and Δ Rns are all less than each self-corresponding predetermined threshold value, if perform step S5, if not, performs step S4;

Step S4, extends T310 timer;

Step S5, re-establishes the connection of Serving cell;

Step S6, judges whether the number that link-quality is greater than handoff threshold Zhi community is greater than the 3rd preset value, and when being judged as YES, execution step S7, when being judged as NO, execution step S8;

Step S7, re-establishes the connection of the macrocell at place, Serving cell;

Step S8, is established to the connection of the best neighbor cell of link-quality;

Step S9, judgement Δ Rn and Δ Rns are all less than each self-corresponding predetermined threshold value, if so, perform step S7, if not, perform step S4.

5. method as claimed in claim 4, is characterized in that, described step S4 is replaceable is:

Step S4 ', judges whether the service delay susceptibility Q that wireless terminal is corresponding is greater than preset value, if so, performs step S7, if not, extends T310 timer.

6. a wireless terminal, is characterized in that, comprising:

T310 arranges module, for when radio link problem being detected, judges whether Rs is greater than the first preset value, and when being judged as YES, enables the T310 timer with base station agreement; When being judged as NO, further judge whether Δ M is greater than its corresponding predetermined threshold value, if be judged as NO, enable the T310 timer with base station agreement, if be judged as YES, according to Δ M, timer factor alpha is set, and adjusts the T310 timer of arranging with base station according to α, enable the T310 timer after adjustment;

Wherein, M is a kind of in Rs, Rn or Rns, when M is Rs, Δ M is the fall and the ratio of measuring number of times of M within the very first time, when M is Rn or Rns, Δ M is the ascensional range and the ratio of measuring number of times of M in the very first time, Rs is the link-quality of Serving cell, the link-quality that Rn is adjacent cell, and Rns is that Rn deducts the difference that Rs obtains, the timer factor alpha arranging is less than 1, and with Δ M negative correlation.

7. wireless terminal as claimed in claim 6, is characterized in that, described T310 arrange module specifically for:

According to N, adjust timer factor alpha, wherein, described timer factor alpha and N positive correlation, and/or, according to Q, adjust timer factor alpha, wherein, described timer factor alpha and Q negative correlation; And adjust the T310 timer of arranging with base station according to the α after adjusting;

Wherein N is the number that link-quality that wireless terminal detects is greater than the neighbor cell of handoff threshold value, the service delay susceptibility that Q is wireless terminal.

8. wireless terminal as claimed in claim 7, is characterized in that, whether the described Rs of judgement is greater than the first preset value, is replaceablely:

Judge whether Rs-Rn is greater than the second preset value.

9. wireless terminal as claimed in claim 6, is characterized in that, also comprises:

Timeout treatment module, for carrying out:

Step S1, when T310 timer expiry being detected, judges whether that the link-quality of at least one community is greater than handoff threshold value, if be judged as YES, and execution step S2, if be judged as NO, execution step S9;

Step S2, judges whether each top-quality community of community link that link-quality is greater than handoff threshold value is Serving cell, if perform step S3, if not, performs step S6;

Step S3, judges whether Δ Rs, Δ Rn and Δ Rns are all less than each self-corresponding predetermined threshold value, if perform step S5, if not, performs step S4;

Step S4, extends T310 timer;

Step S5, re-establishes the connection of Serving cell;

Step S6, judges whether the number that link-quality is greater than handoff threshold Zhi community is greater than the 3rd preset value, and when being judged as YES, execution step S7, when being judged as NO, execution step S8;

Step S7, re-establishes the connection of the macrocell at place, Serving cell;

Step S8, is established to the connection of the best neighbor cell of link-quality;

Step S9, judgement Δ Rn and Δ Rns are all less than each self-corresponding predetermined threshold value, if so, perform step S7, if not, perform step S4.

10. wireless terminal as claimed in claim 9, is characterized in that, described step S4 is replaceable is:

Step S4 ', judges whether the service delay susceptibility Q that wireless terminal is corresponding is greater than preset value, if so, performs step S7, if not, extends T310 timer.

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