CN103582049B - A kind of method and apparatus for realizing frequency point priority information inheritance - Google Patents
A kind of method and apparatus for realizing frequency point priority information inheritance Download PDFInfo
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- CN103582049B CN103582049B CN201210249110.2A CN201210249110A CN103582049B CN 103582049 B CN103582049 B CN 103582049B CN 201210249110 A CN201210249110 A CN 201210249110A CN 103582049 B CN103582049 B CN 103582049B
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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
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Abstract
The invention discloses a kind of inheritance methods and device for realizing frequency point precedence information, when standard variation occurs, generate and inherit residing cell after information and sending changes to standard；Supplement frequency point precedence information gravity treatment relevant parameter corresponding in residing cell after standard variation；The frequency point precedence information for inheriting residing cell before message includes standard variation.The present invention realizes the technology of frequency point priority information inheritance, provides complete feasible scheme for the frequency point priority information inheritance after standard gravity treatment, and can be based on the cell reselection after this realization standard gravity treatment.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a device for realizing frequency point priority information inheritance.
Background
When a UE (user equipment) is powered on and selects a Public Land Mobile Network (PLMN), the UE starts to find a suitable cell in the PLMN for camping, which is called cell selection, and the currently camped cell is called a serving cell. After residing in the cell for a period of time, the serving cell may not meet the residing requirement due to the mobility of the user equipment or the change of the network signal quality, or a cell better than the current serving cell may be available for residing in the neighboring cell, and then a cell reselection process is initiated.
Taking time division duplex code division multiple access (TD-SCDMA) System as an example, when detecting a cell for reselection, a System information block (Sib) broadcast applied to the cell is needed, which mainly includes: the method comprises the steps of providing a Sib11/12 containing cells with the same frequency, different frequency and GSM (RAT) modes, and providing a Sib19 with frequency point priority information of various modes including LTE (Long Term evolution). The frequency point priority information mainly comprises frequency point information, frequency point priority and some parameters related to reselection evaluation.
There are two main evaluation methods for cell reselection in TD, one is ordinary cell reselection evaluation in case of not receiving Sib type 19 (referred to as Sib 19), and the other is frequency point priority evaluation in case of receiving Sib 19. The common cell reselection evaluation mainly aims at cell measurement in the Sib11/12, calculates the R value of a cell in various standards, and uses a cell with the R value larger than that of a serving cell for cell reselection. The frequency point priority evaluation mainly refers to selecting the best cell with the highest frequency point priority under the condition that the S value of the cell meets the reselection evaluation threshold according to the priorities of the frequency points under various systems planned in the Sib 19.
According to the description of the protocol for cell reselection, when system reselection is about to occur (for example, a cell reselected from a TD system to a cell of other systems or a cell reselected from a cell of other systems to a cell of TD system), frequency point priority information of various systems received in an original resident system needs to be inherited to a new resident cell for continuous use, but the inherited description of the reselected cell between the systems in the current protocol is not clear.
Disclosure of Invention
In view of this, the main object of the present invention is to provide a method and an apparatus for implementing inheritance of frequency point priority information, which provide a complete feasible scheme for inheritance of frequency point priority information after system reselection.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for realizing inheritance of frequency point priority information comprises the following steps:
when the system is changed, generating an inheritance message and sending the inheritance message to a cell where the system is changed so as to inherit the frequency point priority information; supplementing relevant reselection parameters corresponding to the cells in which the frequency point priority information is located after the mode change;
the inheritance message contains the frequency point priority information of the cell where the system is located before being changed.
The method for generating the inheritance message and sending the inheritance message to the cell with the changed system comprises the following steps:
and organizing inheritance messages containing frequency point priority information and effective time information of various systems in the User Equipment (UE) aiming at the reselection evaluation task of the first system of the system before change, and sending the inheritance messages to the reselection evaluation task of the second system aiming at the system after change.
The method for inheriting the priority information of the frequency points comprises the following steps:
and the second system reselection evaluation task stores the frequency point priority information in the received inheritance message into a global data area, and sets the state of the frequency point priority as a special state.
The method for supplementing the reselection related parameters comprises the following steps:
if the frequency point contained in the inherited frequency point priority information exists in the system information, the information under the frequency point in the system information is supplemented into the inherited frequency point priority information.
The information under the frequency point in the system information comprises an S value calculation parameter and a reselection evaluation threshold.
After inheriting the frequency point priority information, the method also comprises the following steps:
and starting an inherited timer indicating the effective time of the frequency point priority information, utilizing the inherited frequency point priority information to perform cell reselection evaluation before the inherited timer is overtime, clearing all the inherited frequency point priority information after the inherited timer is overtime, and performing cell reselection evaluation by adopting the frequency point priority information in the system information again.
The method further comprises the following steps: firstly, judging whether the priority of the special frequency point is used currently, and carrying out subsequent operations including generating the inheritance message under the condition of using the priority of the special frequency point.
An inheritance device for realizing frequency point priority information comprises an inheritance message processing unit and a reselection evaluation unit; wherein,
the inheritance message processing unit is used for generating inheritance messages and sending the inheritance messages to the cell where the system is changed so as to inherit the frequency point priority information when the system is changed;
the reselection evaluation unit is used for supplementing reselection related parameters corresponding to the cells in which the frequency point priority information is located after the mode change;
the inheritance message contains the frequency point priority information of the cell where the system is located before being changed.
When the inheritance message processing unit generates inheritance message and sends the inheritance message to the cell where the system is changed, the inheritance message processing unit is used for:
and triggering the UE to organize inheritance information containing frequency point priority information and effective time information of various systems aiming at the reselection evaluation task of the first system of the system before change, and sending the inheritance information to the reselection evaluation task of the second system aiming at the system after change.
When the priority information of the frequency point is inherited, the second system reselection evaluation task is used for:
and storing the frequency point priority information in the received inheritance message into a global data area, and setting the state of the frequency point priority as a special state.
The reselection evaluation unit, when supplementing the reselection related parameter, is configured to:
if the frequency point contained in the inherited frequency point priority information exists in the system information, the information under the frequency point in the system information is supplemented into the inherited frequency point priority information.
The information under the frequency point in the system information comprises an S value calculation parameter and a reselection evaluation threshold.
The device also comprises an inheritance timer which indicates the effective time of the frequency point priority information, and the inheritance timer is started after inheriting the frequency point priority information;
and the reselection evaluation unit is used for performing cell reselection evaluation by using the inherited frequency point priority information before the inheritance timer is overtime, clearing all inherited frequency point priority information after the inheritance timer is overtime, and performing cell reselection evaluation by using the frequency point priority information in the system information again.
The inheritance message processing unit is further configured to: firstly, judging whether the priority of the special frequency point is used currently, and carrying out subsequent operations including generating the inheritance message under the condition of using the priority of the special frequency point.
The invention provides a technology for realizing inheritance of frequency point priority information, provides a complete feasible scheme for inheritance of frequency point priority information after system reselection, and can realize cell reselection after system reselection based on the complete feasible scheme.
Drawings
Fig. 1 is a flowchart for implementing frequency point priority information inheritance according to an embodiment of the present invention;
fig. 2 is a simplified flow chart of implementing frequency point priority information inheritance according to the embodiment of the present invention;
fig. 3 is a diagram of an apparatus for implementing frequency point priority information inheritance according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of frequency point priorities according to an embodiment of the present invention.
Detailed Description
In practical applications, frequency point priority information inheritance related to inter-system reselection (for example, frequency point priority information inheritance from GSM system reselection to LTE system, frequency point priority information inheritance from other system reselection to TD, or frequency point priority information inheritance from TD reselection to other system, etc.) can all apply the technical contents described below. In the following, only TD will be described as an example.
The TD inherits the frequency point priority information of other systems:
when the UE reselects the TD mode from other modes, the UE can reside after the TD cell reselection condition is judged to be successful. Before starting measurement of a TD system service cell, judging whether an inheritance message from other systems before reselection is received in the TD system, if the inheritance message is received, UE firstly clears locally stored frequency point priority information, and stores the frequency point priority information inherited from the inheritance message into a global data area according to the structure of a local frequency point priority list.
The protocol stack of the UE reads the frequency point priority information in the Sib19, traverses the frequency point priority items of various systems, and if the frequency point corresponding to the traversed frequency point priority exists in the global data area saved in inheritance, the parameters under the frequency point in the Sib19 are filled in the frequency point priority list item of the global data area (because the inheritance message only contains the frequency point priority and the frequency point information, and does not contain information such as S value calculation parameter information and reselection evaluation threshold required by reselection evaluation, the information needs to be supplemented according to the Sib19, and the frequency point existing in the Sib19 but not existing in the inheritance message is ignored).
After the frequency point priority information is stored, the UE can start an inheritance timer indicating the life cycle of the inheritance message, and cell reselection is carried out according to the inherited frequency point priority items before the inheritance timer is overtime.
And after the inheritance timer is overtime, the UE does not use the inherited frequency point priorities to reselect the cell any more, deletes the local frequency point priority list, reads the frequency point priorities in the Sib19 again, and reselects the cell by adopting the frequency point priorities of various systems in the Sib 19.
TD provides frequency point priority information for other systems to inherit:
after reselecting from TD mode to other modes, UE needs to provide inheritance information from TD to other modes, firstly needs to judge whether to use the priority of dedicated frequency point (network side configuration decision), if not, does not inherit. Under the condition of using the priority of the dedicated frequency point, the UE needs to fill the priority information of the frequency point stored locally at present into the inheritance message. Meanwhile, the inherited timer under the TD needs to be stopped, the remaining time of the inherited timer (the total time length of the timer minus the time length of the timer which is operated under the TD) is calculated, and the calculated remaining time is filled into the inherited message, so that the timer is continuously operated when the priority information of the frequency point is inherited.
Referring to the flow shown in fig. 1, for example, the inherited information sent to the TD after the UE reselects to the TD from other systems, the inherited information contains frequency point information of multiple systems, and here, processing LTE system frequency point information therein is taken as an example. As can be seen from fig. 1, the frequency point priority information of the original system in the inheritance message can be stored in the local frequency point priority list; then, reading the system information Sib19, and decoding the message structure content in the system information Sib 19; traversing the frequency point information stored in the Sib19, and finishing information storage if traversing is finished; otherwise, traversing the frequency point information under the local frequency point priority item until finding the frequency point same as the frequency point in the Sib19, and if not, traversing the next frequency point in the Sib 19. And if the frequency point in the Sib19 exists in the local frequency point priority list, storing relevant reselection parameters of the frequency point in the Sib19 information to a corresponding position in the local frequency point priority list.
After all the frequency points in the Sib19 are traversed, the process ends.
Specifically, when the UE reselects from the cell of system a to the cell of system B and camps on the cell, the following processing may be performed:
1. when the UE resides in the cell 1 under the standard a, the standard a reselection evaluation task running in the UE receives various standard frequency point priority information of the network for reselection evaluation, and there are two types of sources of the frequency point priority information: one is contained in the broadcasted network system information, and the UE stores the frequency point priority information into a global data area of a mode A reselection evaluation task and records the frequency point priority state at the moment as a system information state. The other is contained in the transmitted network dedicated signaling, and the frequency point priority information in the global data area is deleted when the dedicated signaling is received. The frequency point priority information in the special signaling can be taken as the main, the system information under the standard A cell 1 is adopted as the supplement, and the state of the frequency point priority is recorded as the special state. It should be noted that the network dedicated signaling has timeliness, when a given time is out of date, the mode a reselection evaluation task deletes the frequency point priority information stored in the global data area, re-reads and stores the frequency point priority information in the system information, and sets the frequency point priority state back to the system information state;
2. when a mode A reselection evaluation task running in UE evaluates that a cell 2 under a current mode B meets reselection conditions, namely reselects the cell 2 under the mode B, frequency point priority information under the current mode needs to be organized for the mode to be resided to inherit. Firstly, judging whether the current frequency point priority state is in a special state or not by a mode A reselection evaluation task of the UE, if so, organizing the frequency point priority information stored in a global data area of the current mode A reselection evaluation task for other modes to inherit, otherwise, not inheriting;
3. if the mode A reselection evaluation task needs to be inherited, organizing the frequency point priority information stored in the global data area of the mode A reselection evaluation task (for example, according to a mode-frequency point-priority structure), and simultaneously subtracting the time spent before the mode A reselection evaluation task from the special state frequency point priority time to obtain the special state frequency point priority remaining time which is used as the effective time inherited to the mode B;
4. the mode A reselection evaluation task sends organized inheritance messages containing frequency point priority information and effective time information of various modes to a mode B reselection evaluation task;
5. after UE reselects to a cell 2 of a system B and resides, when a system B reselection evaluation task of the UE finds that inherited messages from other systems are received, firstly, frequency point priority information in the inherited messages is stored in a global data area of the system B reselection evaluation task, and the state of the frequency point priority is set to be a special state. Because the inheritance message only contains frequency points and priority information thereof under various systems, necessary parameters for calculating cell S values (important parameters for better cell evaluation) under frequency points of various systems in reselection evaluation, a reselection evaluation threshold and the like are lacked, and therefore the inheritance message needs to be supplemented from system information under the current system. The specific principle is as follows: if the frequency point contained in the inherited frequency point priority information exists in the system information, supplementing the information (including S value calculation parameters and reselection evaluation thresholds) under the frequency point in the system information into the inherited frequency point priority information;
6. in the standard B, after supplementing the frequency point priority information to the global data area according to the inherited frequency point priority information and the system information, an inherited timer indicating the effective time needs to be started. Before the inheritance timer is overtime, the inherited frequency point priority information is utilized to carry out cell reselection evaluation, after the inheritance timer is overtime, all the inherited frequency point priority information is removed, and the frequency point priority information in the system information is adopted again to carry out cell reselection evaluation.
As can be known from the above technical description, the operation idea of the present invention for implementing frequency point priority information inheritance may represent a flow as shown in fig. 2, where the flow includes the following steps:
step 210: when the system is required to be changed, generating an inheritance message and sending the inheritance message to a cell where the system is changed; the inheritance message contains the frequency point priority information of the cell where the system is located before being changed.
Step 220: and supplementing the reselection related parameters corresponding to the cell in which the frequency point priority information is located after the formula change.
In order to ensure that the technical description and the operation idea can be successfully realized, the arrangement shown in fig. 3 can be carried out. Referring to fig. 3, fig. 3 is a diagram of a device for implementing frequency point priority information inheritance according to an embodiment of the present invention, where the device includes an inheritance message processing unit and a reselection evaluation unit that can be connected to each other.
In practical application, when a system is required to be changed, the inheritance message processing unit can generate inheritance messages and send the inheritance messages to a cell where the system is changed; the inheritance message contains the frequency point priority information of the cell where the system is located before being changed. The reselection evaluation unit can supplement reselection related parameters corresponding to the cells in which the frequency point priority information is located after the formula change.
The inheritance message includes two parts: frequency point priority information and effective time. Wherein the effective time is the remaining available time of the frequency point priority. The structure of the frequency point priority adopts a standard-frequency point-priority structure, which is shown in figure 4.
In summary, the present invention provides a technique for implementing frequency point priority information inheritance, provides a complete feasible scheme for frequency point priority information inheritance after system reselection, and can implement cell reselection after system reselection based on the feasible scheme, regardless of the method or the device.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (12)
1. A method for realizing inheritance of frequency point priority information is characterized by comprising the following steps:
when the system is changed, generating an inheritance message and sending the inheritance message to a cell where the system is changed so as to inherit the frequency point priority information; supplementing relevant reselection parameters corresponding to the cells in which the frequency point priority information is located after the mode change;
the inheritance message contains frequency point priority information of a cell where the inheritance message is located before system change;
the method for generating the inheritance message and sending the inheritance message to the cell with the changed system comprises the following steps:
and organizing inheritance messages containing frequency point priority information and effective time information of various systems in the User Equipment (UE) aiming at the reselection evaluation task of the first system of the system before change, and sending the inheritance messages to the reselection evaluation task of the second system aiming at the system after change.
2. The method of claim 1, wherein the method for inheriting the priority information of the frequency points comprises:
and the second system reselection evaluation task stores the frequency point priority information in the received inheritance message into a global data area, and sets the state of the frequency point priority as a special state.
3. The method of claim 1, wherein the reselection-related parameter is supplemented by:
if the frequency point contained in the inherited frequency point priority information exists in the system information, the information under the frequency point in the system information is supplemented into the inherited frequency point priority information.
4. The method of claim 3, wherein the information at the frequency point in the system information includes an S-value calculation parameter and a reselection evaluation threshold.
5. The method according to any of claims 1 to 4, wherein after inheriting the frequency point priority information, the method further comprises:
and starting an inherited timer indicating the effective time of the frequency point priority information, utilizing the inherited frequency point priority information to perform cell reselection evaluation before the inherited timer is overtime, clearing all the inherited frequency point priority information after the inherited timer is overtime, and performing cell reselection evaluation by adopting the frequency point priority information in the system information again.
6. The method of claim 1, further comprising: firstly, judging whether the priority of the special frequency point is used currently, and carrying out subsequent operations including generating the inheritance message under the condition of using the priority of the special frequency point.
7. An inheritance device for realizing frequency point priority information is characterized by comprising an inheritance message processing unit and a reselection evaluation unit; wherein,
the inheritance message processing unit is used for generating inheritance messages and sending the inheritance messages to the cell where the system is changed so as to inherit the frequency point priority information when the system is changed;
when the inheritance message processing unit generates inheritance message and sends the inheritance message to the cell where the system is changed, the inheritance message processing unit is further configured to:
triggering a UE to organize inheritance information containing frequency point priority information and effective time information of various systems aiming at a first system reselection evaluation task of a system before change, and sending the inheritance information to a second system reselection evaluation task aiming at the system after change;
the reselection evaluation unit is used for supplementing reselection related parameters corresponding to the cells in which the frequency point priority information is located after the mode change;
the inheritance message contains the frequency point priority information of the cell where the system is located before being changed.
8. The apparatus according to claim 7, wherein when inheriting frequency point priority information, the reselection evaluation task of the second standard is configured to:
and storing the frequency point priority information in the received inheritance message into a global data area, and setting the state of the frequency point priority as a special state.
9. The apparatus according to claim 7, wherein the reselection evaluation unit, when supplementing the reselection-related parameter, is configured to:
if the frequency point contained in the inherited frequency point priority information exists in the system information, the information under the frequency point in the system information is supplemented into the inherited frequency point priority information.
10. The apparatus of claim 9, wherein the information at the frequency point in the system information includes an S-value calculation parameter and a reselection evaluation threshold.
11. The apparatus according to any one of claims 7 to 10, further comprising an inheritance timer indicating the valid time of the frequency point priority information, wherein the inheritance timer is started after inheriting the frequency point priority information;
and the reselection evaluation unit is used for performing cell reselection evaluation by using the inherited frequency point priority information before the inheritance timer is overtime, clearing all inherited frequency point priority information after the inheritance timer is overtime, and performing cell reselection evaluation by using the frequency point priority information in the system information again.
12. The apparatus of claim 7, wherein the inherited message processing unit is further configured to: firstly, judging whether the priority of the special frequency point is used currently, and carrying out subsequent operations including generating the inheritance message under the condition of using the priority of the special frequency point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210249110.2A CN103582049B (en) | 2012-07-18 | 2012-07-18 | A kind of method and apparatus for realizing frequency point priority information inheritance |
| PCT/CN2013/077928 WO2014012419A1 (en) | 2012-07-18 | 2013-06-25 | Method and device for realizing frequency point priority information inheritance |
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| CN201210249110.2A CN103582049B (en) | 2012-07-18 | 2012-07-18 | A kind of method and apparatus for realizing frequency point priority information inheritance |
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| CN114007247A (en) * | 2020-07-28 | 2022-02-01 | 深圳市中兴微电子技术有限公司 | Method, device, equipment and storage medium for determining cell reselection evaluation frequency |
| US11792712B2 (en) | 2021-12-23 | 2023-10-17 | T-Mobile Usa, Inc. | Cell reselection priority assignment based on performance triggers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841875A (en) * | 2009-03-16 | 2010-09-22 | 中兴通讯股份有限公司 | Realization method and realization device for cell reselection |
| CN102202265A (en) * | 2011-06-10 | 2011-09-28 | 电信科学技术研究院 | Cell reselection method and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101637048A (en) * | 2007-03-13 | 2010-01-27 | 交互数字技术公司 | Cell reselection process for wireless communications |
| CN102238483B (en) * | 2011-07-08 | 2013-12-25 | 电信科学技术研究院 | Cell reselecting method and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101841875A (en) * | 2009-03-16 | 2010-09-22 | 中兴通讯股份有限公司 | Realization method and realization device for cell reselection |
| CN102202265A (en) * | 2011-06-10 | 2011-09-28 | 电信科学技术研究院 | Cell reselection method and equipment |
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