CN107333311B - Method for preventing LTE terminal from repeatedly initiating tracking area updating process in idle state - Google Patents
Method for preventing LTE terminal from repeatedly initiating tracking area updating process in idle state Download PDFInfo
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- CN107333311B CN107333311B CN201710613613.6A CN201710613613A CN107333311B CN 107333311 B CN107333311 B CN 107333311B CN 201710613613 A CN201710613613 A CN 201710613613A CN 107333311 B CN107333311 B CN 107333311B
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- tracking area
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- lte terminal
- area updating
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The invention provides a method for preventing an LTE terminal from repeatedly initiating a tracking area updating process in an idle state, which is characterized in that an abnormity detection mechanism is added to limit the terminal to initiate the tracking area updating process at most five times after the terminal resides in the same PCI cell at the same frequency point, wherein the PCI is a physical cell identifier; before initiating the random access of the tracking area updating process, judging whether five times of tracking area updating is continuously initiated in the current cell, if not, initiating the tracking area updating process; if the conditions are met, the current cell is listed in a blacklist, and other cells are accessed; after the update flow of the tracking area is executed, judging whether a timer T3411 of an NAS layer of the LTE terminal has response or not, and if the response fails or does not have response, continuing the overtime of the T3411; and the tracking area updating success response successfully resides in the current cell. By applying the method and the device, the phenomena that the service cannot be provided and the power consumption is too high due to the fact that the LTE terminal repeatedly initiates the tracking area updating process under certain abnormity at the network side can be avoided.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a method for preventing a terminal from repeatedly initiating a tracking area updating process under a certain condition in a related process of updating a tracking area in an LTE mobile communication system.
Background
The updating process of the tracking area in the LTE system is always initiated by the terminal and is used for informing the network terminal that the current position is changed. After the terminal is attached to the network, the network allocates a set of registered tracking areas to the terminal, and the combination of the tracking areas is a tracking area identification list. If the terminal in idle state enters a new tracking area and the identification of the tracking area is not in the tracking area identification list registered by the terminal, the terminal should initiate a tracking area updating process to request the network to redistribute the tracking area identification list and register the new tracking area location information in the network.
Disclosure of Invention
The invention provides a method for preventing an LTE terminal from repeatedly initiating a tracking area updating process in an idle state.
The technical scheme of the invention provides a method for preventing an LTE terminal from repeatedly initiating a tracking area updating process in an idle state, and after S1 connection is established between an eNodeB and an EPC, the eNodeB continuously sends a system message; the LTE terminal can initiate cell reselection measurement in an idle state, performs a tracking area updating process, and repeatedly initiates the tracking area updating process when a redistribution condition is met, and the LTE terminal is characterized in that: adding an anomaly detection mechanism to limit the terminal to initiate a tracking area updating process at most five times after the terminal resides in the same PCI cell at the same frequency point, wherein the PCI is a physical cell identifier; the anomaly detection mechanism is implemented as follows:
step a, before initiating random access of a tracking area updating process, judging whether tracking area updating is continuously initiated five times in a current cell, if not, initiating the tracking area updating process; if the conditions are met, the current cell is listed in a blacklist, and other cells are accessed;
b, after the updating process of the tracking area is executed, judging whether a response exists in a timer T3411 of an NAS layer of the LTE terminal, if the updating receiving message or the rejecting message of the tracking area at the network side is not sent down, the step a is continued after the T3411 is overtime; the NAS means a non-access stratum layer,
and c, successfully residing in the current cell after the successful response of the updating of the tracking area.
And the access other cells comprise other PCI cells of the same frequency point or different frequency LTE cells.
And moreover, other PCI cells or different-frequency LTE cells of the same frequency point are accessed, so that the terminal is prevented from being degraded to a 2G/3G network.
Moreover, the repeatedly initiating the tracking area update procedure when the reallocation condition is satisfied means that when a tracking area update receive message or a tracking area reject message on the network side is not issued, and a TAC of a current serving cell is changed within 10 seconds, where the TAC is a tracking area code, the LTE terminal initiates the tracking area update procedure according to a timer T3411, and the length of the timer T3411 is 10 seconds.
Also, the blacklisted cells are not cleared until the terminal is restarted.
And, it is judged at the access stratum whether five tracking area updates are continuously initiated in the current cell.
By applying the technical scheme of the invention, the phenomena that the service cannot be provided and the power consumption is too fast due to the fact that the LTE terminal repeatedly initiates the tracking area updating process under the condition of network side abnormity can be avoided. Compared with the prior art, the method can accurately and efficiently prevent the tracking area from being repeatedly initiated to be updated, can also prevent the terminal from being degraded to the 2G/3G network, and is simple to realize and saves system resources. The method is an important part in the LTE technology innovation in China, has important significance for popularizing a novel mobile network and occupying the leading position of the international industry, and has important market value.
Drawings
Fig. 1 is a basic flowchart of preventing a terminal from repeatedly initiating a tracking area update according to an embodiment of the present invention.
Fig. 2 is a message flow diagram of no response at the tracking area update network side according to an embodiment of the present invention.
FIG. 3 is a flowchart of an anomaly detection mechanism according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.
The LTE terminal initiates cell reselection measurement in an idle state, if a neighbor cell with higher rank than a serving cell exists and a neighbor cell TAC (tracking area code) is different from a TAC (tracking area code) of a current serving cell, a tracking area updating process is initiated, and if a tracking area updating response message or a tracking area rejection message of a network side is not successfully received and the serving cell TAC (tracking area code) is changed within 10 seconds, the terminal initiates the tracking area updating process again. In order to prevent the situation that power consumption is too fast due to the fact that an LTE terminal repeatedly initiates a tracking area updating process, the invention provides an abnormal detection mechanism, the tracking area updating process is initiated for the LTE cell with the same PCI (physical cell identifier) and frequency point for at most five times, if failure occurs, the LTE cell is listed as a blacklist cell for cell reselection measurement and does not stay, and the blacklist cell is not cleared until the terminal is restarted.
Referring to fig. 1, a basic flow for preventing a current LTE network from repeatedly initiating tracking area update under a certain condition is provided in the embodiment of the present invention as follows:
step 1, after establishing S1 connection between eNodeB (base station) and EPC (evolved packet core), eNodeB continuously sends SYSTEM _ INFORMATION _ BROADCAST (SYSTEM message). The TAC of the service cell and the TAC of the adjacent cell are set to different values. In an idle state, the LTE terminal initiates measurement of cell reselection.
SYSTEM INFORMATION BROADCAST represents a SYSTEM message. TAC denotes a tracking area code. The S1 interface is the communication interface between the LTE eNodeB (base station) and the EPC (packet core network). The S1 interface between the evolution base station and the mobile management entity/service gateway divides the SAE/LTE evolution system into a wireless access network and a core network.
Step 2, according to the measurement of the cell reselection of the terminal, if there is a neighboring cell with higher rank than the serving cell and the tracking area code of the neighboring cell is different from the current serving cell, initiating a tracking area updating process, including a radio resource control request process, obtaining IMSI from an attachment process, reconfiguring and obtaining a measurement report;
in an embodiment, step 2, the network side does not respond to the message flow of the tracking area update within 10 seconds of the T3411 timer period:
t3411 is a timer of the NAS layer, has a period of 10 seconds, is started when the tracking area UPDATE fails due to an underlying error, and times out TRACKING AREA UPDATE REQUEST message.
Referring to fig. 2, the specific implementation of step 2 includes the following steps:
step 2.1, after the UE NAS layer initiates the updating of the tracking area, the UE AS layer initiates an RRCConnection Request message with an access type of mo-Signalling to the network side;
UE represents a terminal, NAS represents a non-access layer, AS represents an access layer, mo-Signalling represents data service access initiated by a mobile phone, and RRCConnection Request message is an access Request message;
step 2.2, the network side returns RRCConnectionSetup message to the UE;
the RRCConnectionSetup message is a radio resource control request message;
step 2.3, the UE returns RRCConnectionSetupCompute message and piggybacks a TRACKING AREAUPDATE REQUEST message of the NAS layer to the network side;
the RRCConnectionSetupComplete message is a radio resource control connection establishment completion message, and the TRACKINGAREA UPDATE REQUEST message is a tracking area update request message;
step 2.4, the network side issues the identity request message of the NAS layer to the UE for five times;
the Identification Request message is an Identification identity Request message;
step 2.5, the UE side reports the identity response message of the NAS layer for five times;
the Identification Response message is an Identification identity Response message;
step 2.6, the network side sends an RRCConnectionReconfiguration message with measurement to the UE;
the RRCConnectionReconfiguration message is a reconfiguration message;
step 2.7, reporting RRCConnectionReconfiguration complete message by UE side;
the rrcconnectionreconfiguration complete message is a reconfiguration complete message;
step 2.8, reporting a Measure Report message by the UE side;
the Measure Report message is a measurement Report message.
Step 2.9, when the redistribution condition is satisfied, namely the tracking area update receiving message or the tracking area rejection message of the network side is not issued, and the TAC (tracking area code) of the current service cell is changed within 10 seconds, entering step 3;
step 3, when the tracking area update receiving message or the tracking area rejection message of the network side is not sent, and the TAC (tracking area code) of the current service cell is changed within 10 seconds; the terminal initiates the tracking area updating process of the step 2 again every 10 seconds T3411 overtime, so that the steps 2.1-2.9 can be repeated repeatedly;
t3411 is a NAS layer timer, period 10 seconds, started when a tracking area UPDATE fails due to an underlying error, and times out TRACKING AREA UPDATE REQUEST messages.
In general, after a terminal resides in a cell of a certain PCI at a certain frequency point, a TAC at a network side is acquired by analyzing system information, and if the TAC at the network side is not changed within 10 seconds, a 24.301 protocol provides that the terminal does not access an LTE network after sending a tracking area update message for five times of failure or no response, and then accesses the GERAN or UTRAN network. The PCI represents a physical cell identity.
The invention provides that a terminal initiates tracking area updating processes at most five times after the terminal resides in the same PCI cell of the same frequency point, instead of taking fixed TAC as a judgment basis, the judgment is executed in an access layer, and the interval between the tracking area updating processes five times is 10 seconds of the value of T3411. And when the adjustment condition is met, the same PCI cell of the frequency point is listed in a blacklist cell to prohibit access, and the terminal is changed to access other LTE cells (including other PCI cells of the same frequency point or different frequency LTE cells). This prevents the tracking area update procedure of step 2 from being repeatedly initiated and also prevents the terminal from dropping to the 2G/3G network.
Referring to fig. 3, step 3 of the embodiment includes the following steps:
step 3.1, before initiating the random access of the tracking area updating process, judging whether the tracking area updating is continuously initiated in the cell for five times, if not, initiating the tracking area updating process (as step 2); and if the condition is met, the cell is listed into a blacklist, the blacklist cell is not cleared until the terminal is restarted, and other LTE cells are accessed.
Step 3.2, after the updating process of the tracking area is executed, judging whether a response exists in a NAS layer T3411, if the updating receiving message or the rejecting message of the tracking area at the network side is not issued, the T3411 overtimes and continues to step 3.1;
and 3.3, the tracking area successfully resides in the cell after successfully responding to the updating of the tracking area.
In specific implementation, the automatic operation of the technical scheme flow can be realized in a software mode. The prior art can refer to the corresponding protocol standard, and the present invention is not described in detail.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made or substituted in a similar manner to the specific embodiments described herein by those skilled in the art without departing from the spirit of the invention or exceeding the scope thereof as defined in the appended claims.
Claims (8)
1. A method for preventing LTE terminal from repeatedly initiating tracking area update process in idle state, after S1 connection is established between eNodeB and EPC, eNodeB continuously sends system message; the LTE terminal initiates the measurement of cell reselection in an idle state, performs a tracking area updating process, and repeatedly initiates the tracking area updating process when a redistribution condition is met, and the LTE terminal is characterized in that: adding an anomaly detection mechanism in an access layer, and limiting a terminal to initiate a tracking area updating process at most five times after the terminal resides in the same PCI cell of the same frequency point, wherein the PCI is a physical cell identifier; the anomaly detection mechanism is implemented as follows:
step a, before initiating random access of a tracking area updating process, judging whether tracking area updating is continuously initiated five times in a current cell, if tracking area updating is not continuously initiated five times, initiating a tracking area updating process; if five times of tracking area updating are continuously initiated, the current cell is listed in a blacklist, and other LTE cells are accessed;
b, after the updating process of the tracking area is executed, judging whether a response exists in a timer T3411 of an NAS layer of the LTE terminal, if the updating receiving message or the rejecting message of the tracking area at the network side is not sent down, the step a is continued after the T3411 is overtime; the NAS layer represents a non-access stratum layer,
and c, successfully residing in the current cell after the successful response of the updating of the tracking area.
2. The method of claim 1, wherein the method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in an idle state comprises: and the access to other cells comprises access to other PCI cells or different-frequency LTE cells of the same frequency point.
3. The method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in the idle state according to claim 1 or 2, wherein: the repeatedly initiating the tracking area update process when the redistribution condition is met means that when a tracking area update receiving message or a tracking area reject message on the network side is not issued, and a TAC of a current service cell is changed within 10 seconds, the TAC is a tracking area code, the LTE terminal initiates the tracking area update process according to a timer T3411, and the length of the timer T3411 is 10 seconds.
4. The method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in the idle state according to claim 1 or 2, wherein: the blacklisted cells are not cleared until the terminal is restarted.
5. The method of claim 3, wherein the method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in an idle state comprises: the blacklisted cells are not cleared until the terminal is restarted.
6. The method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in the idle state according to claim 1 or 2, wherein: and judging whether five times of tracking area updating is continuously initiated in the current cell or not in the access layer.
7. The method of claim 3, wherein the method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in an idle state comprises: and judging whether five times of tracking area updating is continuously initiated in the current cell or not in the access layer.
8. The method of claim 4, wherein the method for preventing the LTE terminal from repeatedly initiating the tracking area update procedure in an idle state comprises: and judging whether five times of tracking area updating is continuously initiated in the current cell or not in the access layer.
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| CN107920381A (en) * | 2017-11-30 | 2018-04-17 | 广东欧珀移动通信有限公司 | The detection method and device of LTE network access result, computer-readable storage medium |
| CN107959941B (en) * | 2017-11-30 | 2020-11-17 | Oppo广东移动通信有限公司 | Detection method and device, storage medium |
| CN107889109B (en) * | 2017-12-01 | 2021-07-20 | Oppo广东移动通信有限公司 | Method and device for detecting network access result and computer storage medium |
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