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Network access method and ue
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A network access and standard network technology, applied in the network access method and UE field, can solve problems such as user service unavailability, poor user experience, TAU process failure, etc., and achieve the effect of avoiding cell reselection
Active Publication Date: 2019-11-05
NANJING ZHONGXING SOFTWARE
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[0006] However, if the signal of the selected 3G cell is still relatively weak at this time, the UE will still perform cell reselection according to the LTE cell list in the SIB19 message and the cell reselection principle, and reselect to an LTE cell. Due to problems on the network side, TAU The process may fail again, so repeatedly, the UE will be in a no-service state for a long time, resulting in unavailable user services and very poor user experience
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example 1
[0096] Example 1 (T2 is a fixed value of 10min, such as Figure 4 Shown)
[0097] The program includes the following steps:
[0098] Step 1: The terminal camps on the 3G cell.
[0099] Step 2: In the current scenario, the signal of the 3G cell becomes weaker, and the signal of the 4G cell becomes stronger.
[0100] Step 3: If the cell reselection criterion is met, proceed to step 4; otherwise, proceed to step 2.
[0101] Step 4: Meet the criteria for cell reselection, and the UE reselects to a 4G cell.
[0102] Step 5: The UE initiates the TAU process, registers on the 4G cell, and the network side issues a TRACKING AREAUPDATE ACCEPT message, and the message can include one of the following EMM CAUSEs:
[0103] #16(MSC temporarily not reachable), #17(Network failure), or #22(Congestion). The TAU process failed.
[0104] Step 6: Start a counter A1 in the UE, add 1 to determine if the value of A1 is less than 5, then continue to step 5; if the value of A1 is equal to 5, continue to step 7; ...
example 2
[0107] Example two (T2 is the value set {10min, 20min}, such as Figure 5 Shown)
[0108] Step 1: The terminal camps on the 3G cell.
[0109] Step 2: In the current scenario, the signal of the 3G cell becomes weaker, and the signal of the 4G cell becomes stronger.
[0110] Step 3: If the cell reselection criterion is met, proceed to step 4; otherwise, proceed to step 2.
[0111] Step 4: Meet the criteria for cell reselection, and the UE reselects to a 4G cell.
[0112] Step 5: The UE initiates the TAU process, registers on the 4G cell, and the network side issues a TRACKING AREAUPDATE ACCEPT message, and the message can include one of the following EMM CAUSEs:
[0113] #16(MSC temporarily not reachable), #17(Network failure), or #22(Congestion). The TAU process failed.
[0114] Step 6: Start a counter A1 in the UE, add 1 to determine if the value of A1 is less than 5, then continue to step 5; if the value of A1 is equal to 5, continue to step 7;
[0115] Step 7. The UE selects a 3G cell a...
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Abstract
The present invention relates to a network access method and a UE. The method includes: when the UE performs a reselection operation from a network cell of the first standard to a network cell of the second standard, the UE initiates a TAU process to the network cell of the second standard; when the TAU When the process fails and the number of times the TAU process is initiated reaches the threshold value, the UE selects to access the network cell of the first standard; the value of the second counter that is started is added to the preset value, and when the value of the second counter and the value of the second timer After the time of multiplying the values, if the cell reselection operation condition is met, the UE performs the reselection operation from the first-standard network cell to the second-standard network cell again. The present invention enables the UE to stay in the network cell of the previous standard for a period of time after the failure of the TAU process to perform user services, and avoids frequent cell reselection caused by the failure of the TAU process, causing the UE to be in a no-service state for a long time and causing the user The problem of unavailability of business.
Description
Technical field [0001] The present invention relates to the field of communication technology, and in particular to a network access method and UE (User Equipment, user terminal) that prevent frequent cell reselection from causing unavailability of user services. Background technique [0002] With the development of communication network technology, the core network of the Long Term Evolution (LTE) system only retains the Packet Switched (PS) domain, which is called the Evolved Packet Core (EPC) network. The packet core network mainly includes three logical entities: MME, Serving Gateway (Serving Gateway, S-GW), and Packet Data Network Gateway (Packet Data Network Gateway, PGW). The radio access network of the LTE system is the Evolved Universal Terrestrial Radio Access Network (E-UTRAN). In addition, user equipment can also pass through the GSM\EDGE radio access network (GSM EDGE Radio Access Network, GERAN) Or the Universal Terrestrial Radio Access Network (UTRAN) accesses the...
Claims
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Application Information
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