WO2013078850A1

WO2013078850A1 - Extended access barring information update method and terminal

Info

Publication number: WO2013078850A1
Application number: PCT/CN2012/077355
Authority: WO
Inventors: 毛磊; 艾建勋; 帕洛拉里⋅塞尔吉奥; 戴谦; 许英奇
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-11-29
Filing date: 2012-06-21
Publication date: 2013-06-06
Also published as: CN103139866B; CN103139866A

Abstract

An extended access barring (EAB) information update method and terminal, the method comprises: after the terminal receives the EAB information update indication，the EAB information is recorded to update; When the terminal is ready for initiating an access request, if judging that the EAB information has the update record, then the updated EAB information is read. The present invention could update the EAB information frequently.

Description

Extended access prohibition control information updating method and terminal

Technical field

The present invention relates to the field of mobile communications, and in particular, to an extended access prohibition control (EAB) information update method and terminal.

Background technique

A user equipment (UE, User Equipment) or a terminal needs to perform an access decision process when accessing the network, and is used to determine whether to allow a service request to be initiated, to avoid causing overload on the network side, such as random access overload or signaling overload.

In the Universal Mobile Telecommunications System (UMTS), the user equipment can be divided into 16 access levels (AC, Access Class), where AC 0~9 belong to the common level and are randomly assigned to the terminal; AC 10 indicates Emergency call (not configured for the terminal); AC 11 for network operation; AC 12 for security service; AC 13 for public service category (eg water and gas supplier); AC 14 for emergency service; AC 15 for operator staff . A terminal can be configured as one of the AC0-9s and one or more of the AC11-15s. The configuration information is stored in the USIM (Universal Subscriber Identity Module).

The network side broadcast system message in the UMTS includes the access class barred (ACB) parameter. For the common access level AC 0~9, the ACB corresponding to the network side broadcast is configured as an enumerated type (can be configured as barred (barred) ) or allow (not barred ) ), a total of 10 bits, using bitmap images (bitmap) corresponding to AC 0~9. If the service request is initiated, the user equipment first needs to check whether the ACB parameter broadcasted by the accessed cell is barred with the AC to which the user belongs. If not, the user equipment cannot initiate a service request; if not, the user equipment can initiate a service. request.

In addition, UMTS also introduces the concept of Access Service Classes (ASCs), which are some levels set by the access network for random access channel (RACH, Random Access Channel) resource allocation and access probability. UMTS configuration AC 0-9, and AC10-15 each level is mapped to each level of ASC, ASC has a total of 8 levels, respectively ASC 0-7, where ASCO has the highest priority and ASC7 has the lowest priority. Different RACH resources are preset for different ASC levels. The terminal determines whether it can be connected according to the persistence factor of the ASC corresponding to its AC and the randomly generated 0-1 random number. Into UMTS.

The network side of the Long Term Evolution (LTE) system also broadcasts ACB parameters. For terminals with AC 0 ~ 9, the network side broadcast access scale factor (ac-BarringFactor) and the access barring time (ac-BarringTime) , ac-BarringFactor is used to control the probability of user equipment accessing the network. When the UE needs to initiate a service request, the UE randomly generates a random number (RAND) uniformly distributed between 0 and 1. If the RAND is lower than the access scale factor, the UE may initiate a service request; otherwise, the UE cannot initiate a service request, and The UE will calculate a delay time according to ac-BarringTime, during which it is not allowed to access the same service request again.

In the LTE system, the ACB-related control parameters (access scale factor and access barring time) are carried in the system information SIB2. When the content changes, the system information update mechanism common to the LTE system is executed and the terminal is notified. Update. The specific process is as follows: updating the system information content must be performed when the predefined system information modification period comes; the paging message (Paging) notifies the terminal system that the information changes, the terminal reads all the system information, and obtains the updated ACB. parameter.

In the realization process of the Internet of Things, a large number of machine-like communication devices (MTC Device,

Machine Type Communication Device ) , these MTC devices far exceed the existing user equipment, and the network side introduces an Extended Access Barring (EAB) mechanism to prevent signaling overload or random access overload. The user equipment that is applicable to the EAB (that is, the UE that includes the EAB configuration in the USIM card) needs to determine whether to allow the access network to initiate a service request according to the EAB information broadcasted by the network side.

In general, the system may not configure EAB information, or the configured EAB information is loose. When special circumstances occur, such as power interruption, a large number of MTC devices may initiate access to report abnormal conditions at the same time. If the network determines that such a situation occurs, it is necessary to adjust the EAB information in time and notify the terminal to update, otherwise the network may be in a few seconds. Severe congestion occurs within it. Therefore To design a fast EAB information update mechanism.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide an extended access prohibition control information update method and terminal, and implement fast update of EAB information.

In order to solve the above technical problem, the following technical solutions are used in the embodiment of the present invention:

An extended access prohibition control (EAB) information update method includes:

After receiving the EAB information update indication, the terminal records that the EAB information is updated. When the terminal prepares to initiate the access request, if the terminal determines that there is an updated record of the EAB information, the updated EAB information is read.

Optionally, after the terminal receives the EAB information update indication, the step of recording the EAB information update includes:

The terminal monitors a message that is sent by the network side and carries the EAB information update indication. When the EAB information update indication indicates that the EAB information is updated, the terminal locally records the EAB information to be updated, and does not trigger. Receive updated EAB information.

Optionally, the message carrying the EAB information update indication includes: a paging message, a random access response, or a control signaling.

Optionally, the method further includes:

Before preparing to initiate an access request, the terminal reads the updated EAB information, deletes the updated record of the local EAB information, and performs an access decision according to the latest received EAB information.

Optionally, the method further includes:

When the terminal is ready to initiate an access request, if it is determined that there is no updated record of the EAB information, the terminal performs an access decision according to the last received EAB information.

Optionally, the method further includes:

After the terminal reads the updated EAB information, the terminal deletes the updated record of the local EAB information. Optionally, the updating of the EAB information includes modification of the EAB information, where the modification of the EAB information is performed based on a modification period of the system information, or based on a repetition period of the system information. Row.

Optionally, the EAB information includes: an access prohibition control indication corresponding to each access level. Optionally, the EAB information further includes one or more of the following information:

The network identifier, prohibition time, applicable terminal category, and access scale factor applicable to the EAB information.

A terminal for implementing extended access prohibition control (EAB) information update, comprising a receiving module, a recording module, a judging module and a reading module, wherein:

The receiving module is configured to: receive an EAB information update indication;

The recording module is configured to: record that the EAB information is updated;

The determining module is configured to: when the terminal is ready to initiate an access request, determine whether there is

EAB information has updated records;

The reading module is configured to: when the determining module determines that there is an updated record of the EAB information, read the updated EAB information.

Optionally, the receiving module is configured to receive the EAB information update indication in the following manner: the receiving module listens to a message that is sent by the network side and carries the EAB information update indication, where the EAB information is carried The message of the update indication includes: a paging message, a random access response, or downlink control signaling.

Optionally, the reading module is further configured to:

The updated EAB information is read before the terminal is ready to initiate an access request.

Optionally, the reading module is further configured to:

After reading the updated EAB information, delete the local EAB information with an updated record.

Optionally, the terminal further includes: an access decision module, where:

The access decision module is configured to: perform an access decision based on the most recently received EAB information. Optionally, the EAB information includes: an access prohibition control indication corresponding to each access level. Optionally, the EAB information further includes one or more of the following information:

The network identifier, prohibition time, applicable terminal category, and access scale factor applicable to the EAB information. The EAB information updating method and the terminal, after the terminal knows that the system updates the EAB information, does not immediately receive the updated EAB information, and only the recording system performs the EAB information update event; when the terminal is ready to initiate the access request, the terminal goes The updated EAB information is re-read and the access decision is made according to the latest received EAB information. The above EAB update mechanism can avoid the impact of the EAB update on the ordinary terminal; and during the repeated update of the EAB information, the terminal that does not initiate the access does not need to update every time, but only needs to read the latest EAB information before using it. In the access process, the power consumption of the terminal is reduced. BRIEF abstract

1 is a flow chart of Embodiment 1 of the present invention;

Figure 2 is a flow chart of Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a terminal according to Embodiment 3 of the present invention. Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

Example 1

As shown in Figure 1, the following steps are included:

Step 101: After receiving the EAB information update indication, the terminal records the EAB information update; the network side sets a dedicated EAB information update indication in the message sent to the terminal; the terminal monitors the message, and the EAB information update indication indicates the EAB information. When there is an update, the EAB information update indication set in the message is received. After receiving the EAB information update indication, the terminal locally updates the EAB information, but does not immediately trigger the reception of the updated EAB information.

The message carrying the EAB information update indication includes: a paging message, a random access response, or downlink control signaling. Step 102: When preparing to initiate an access request, the terminal determines that the updated EAB information is read if the EAB information is updated.

The terminal is ready to initiate an access request. The non-access stratum (NAS) of the terminal triggers the access layer of the terminal to perform an access request, but the access layer of the terminal has not performed the access process.

The EAB information is carried in an existing SIB message or a new SIB message.

After reading the updated EAB information, the terminal needs to delete the updated records of the local EAB information.

After the terminal reads the updated EAB information, the terminal makes an access decision according to the latest received EAB information. If the terminal determines that the EAB information is not updated, it does not need to read the EAB information. It may be that the terminal has read the updated EAB information and deletes the updated local EAB information before the access request is prepared. The latest EAB information received at this time is the most recently received EAB information. For example, if the terminal does not receive the EAB information update indication between the previous acquisition of the EAB information and the preparation for the access, the terminal directly uses the previously acquired EAB information to perform the access decision.

Example 2

This embodiment is an application example of the first embodiment. The process of the network includes the operation of the network side network element. As shown in FIG. 2, the method includes:

Step 201: The system periodically broadcasts the EAB information.

The EAB information includes at least an access prohibition control indication (allowed or disabled) corresponding to AC0-9. Optionally, the EAB information may further include one or more of the following information: network identifier, prohibition time, applicable terminal category, and access scale factor applicable to the EAB information. The network identifier includes a PLMN (Public Land Mobile Network) identity or a RAN (Radio Access Network) identity.

The EAB information may be carried in existing system information, such as the second system information block (SIB2); or a dedicated system information block (SIBx) may be configured to carry.

The modification of the EAB information may be performed based on the system information modification period or based on the system information repetition period. That is, the EAB information is modified during the system information modification period or the EAB information is modified during the system information repetition period.

The system refers to an access network element, such as an evolved Node B (eNB) or a wireless network control. Controller (RNC), etc.

Step 202: The system decides to update the EAB information;

The system may decide to update the EAB information according to the access network and/or the core network load condition, or the operation and maintenance trigger, or the internal algorithm of the system.

The EAB information update in the embodiment of the present invention includes: initial configuration of the EAB information, for example, the EAB information is not configured before, and the configuration is now started; or the EAB information is modified, for example, the EAB information is configured before, and the content is required according to the current system situation. Modify; or cancel the EAB information, for example, EAB information is configured before, the current system load returns to normal, and the system decides to cancel the configured EAB information.

Step 203: The system notifies the terminal that the EAB information is updated.

The most common notification method is paging. The system sets a dedicated EAB information update indication in the paging message. When the indication is set, the system will update the EAB information. Of course, the system may also use other methods to notify the terminal of EAB information update, such as downlink control signaling: random access response (RAR) or downlink control signaling carried in the physical downlink control channel (PDCCH). (DCI), etc. Similarly, in order to separately indicate EAB information update, it is necessary to set a specific indication bit in these signaling.

Step 204: The terminal monitors the paging message and finds that the EAB information update indication is set, and then learns that the system needs to update the EAB information. At this time, the terminal does not need to immediately read the updated EAB information, but only records the internal information in the terminal. Event

If, in the subsequent process, the EAB information is updated by other reasons, such as EAB information is carried in SIB2, because the other parameters in SIB2 are changed, the terminal re-reads SIB2, and the EAB information is updated by the way. The terminal deletes the previously recorded EAB update event record.

Step 205: The system periodically broadcasts the updated EAB information.

This step has no direct logical relationship with step 204. This step can be performed only after step 203.

Step 206: When the terminal is ready to initiate an access request, the terminal determines whether there is an EAB update event record locally, if yes, re-acquires the EAB information, and performs an access decision according to the latest received EAB information, if not, according to the latest The received EAB information is used for access decision. If the terminal does not record an EAB update event when it is ready to initiate an access request, it indicates that the EAB information saved by the terminal is consistent with the EAB information broadcast by the current system, so there is no need to re-acquire the EAB information.

Example 3

This embodiment introduces a terminal that implements the foregoing method. As shown in FIG. 3, the terminal includes a receiving module 301, a recording module 302, a determining module 303, and a reading module 304, where:

The receiving module 301 is configured to: receive an EAB information update indication;

The recording module 302 is configured to: record that the EAB information is updated;

The determining module 303 is configured to: when the terminal is ready to initiate an access request, determine whether there is an updated record of the EAB information;

The reading module 304 is configured to read the updated EAB information when the determining module 303 determines that there is an updated record of the EAB information.

Optionally, the receiving module 301 is configured to receive the EAB information update indication in the following manner: the receiving module 301 listens to the message sent by the network side that carries the EAB information update indication. The message carrying the EAB information update indication includes: a paging message, a random access response, or a downlink control signal.

Optionally, the reading module 304 is further configured to read the updated EAB information before the terminal prepares to initiate the access request.

Optionally, the reading module 304 is further configured to delete the updated record of the local EAB information after reading the updated EAB information.

Optionally, the terminal may further include: an access decision module 305, configured to perform an access decision according to the latest received EAB information.

The foregoing EAB information includes: an access prohibition control indication corresponding to each access level. In addition, one or more of the following information may be included: network identifier for EAB information, prohibition time, applicable terminal category, access scale factor. One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct the associated hardware, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

Industrial applicability

The EAB information updating method and the terminal, after the terminal knows that the system updates the EAB information, does not immediately receive the updated EAB information, and only the recording system performs the EAB information update event; when the terminal is ready to initiate the access request, the terminal goes The updated EAB information is re-read and the access decision is made according to the latest received EAB information. The above EAB update mechanism can avoid the impact of the EAB update on the ordinary terminal; and during the repeated update of the EAB information, the terminal that does not initiate the access does not need to update every time, but only needs to read the latest EAB information before using it. In the access process, the power consumption of the terminal is reduced. Therefore, the present invention has strong industrial applicability.

Claims

Claim

1. An extended access prohibition control (EAB) information update method, comprising:

2. The method according to claim 1, wherein, after the terminal receives the EAB information update indication, the step of recording the updated EAB information includes:

The method according to claim 2, wherein the message carrying the EAB information update indication comprises: a paging message, a random access response or downlink control signaling.

4. The method of claim 1 further comprising:

5. The method of claim 1 further comprising:

6. The method of any of claims 1-3, 5, further comprising:

After the terminal reads the updated EAB information, the local EAB information is deleted and the updated record is deleted.

7. The method of claim 1 wherein:

The updating of the EAB information includes modification of the EAB information, the modification of the EAB information is performed based on a modification period of the system information, or based on a repetition period of the system information.

The method according to any one of claims 1-5, wherein the EAB information comprises: an access prohibition control indication corresponding to each access level.

9. The method according to claim 8, wherein the EAB information further includes one or more of the following information: The network identifier, prohibition time, applicable terminal category, and access scale factor applicable to the EAB information.

10. A terminal for implementing extended access prohibition control (EAB) information update, comprising a receiving module, a recording module, a determining module, and a reading module, wherein:

The determining module is configured to: when the terminal is ready to initiate an access request, determine whether there is an updated record of the EAB information;

The terminal according to claim 10, wherein the receiving module is configured to receive the EAB information update indication in a lower mode:

The receiving module monitors a message that is sent by the network side and carries the EAB information update indication, and the message that carries the EAB information update indication includes: a paging message, a random access response, or a downlink control signaling.

The terminal according to claim 10, wherein the reading module is further configured to: read the updated EAB information before the terminal is ready to initiate an access request.

The terminal according to any one of claims 10 to 12, wherein the reading module is further configured to:

The terminal of claim 10, wherein the terminal further comprises: an access decision module, wherein:

The access decision module is configured to: perform an access decision based on the most recently received EAB information.

The terminal according to any one of claims 10 to 12, wherein the EAB information comprises: an access prohibition control indication corresponding to each access level.

The terminal according to claim 15, wherein the EAB information further includes one or more of the following information: