TW201308955A - Method for renewing indication of system information and base station and user equipment using the same - Google Patents

Abstract

A method for a method for renewing indication of system information, a base station using the same, a user equipment (UE) using the same, and a wireless communication system using the same is described. This disclosure proposes that renewing indication of system information and updating system information are not based on the traditional SIB (system information block) update and acquisition mechanisms. For the example of a random access (RA) procedure under extended access barring (EAB), an eNB could update EAB parameters at the time when the EAB SIB exists. Besides, a MTC (machine-type communication) device always assumes that the EAB is disabled & transmits preamble for RA directly. When the preamble is received by the eNB, the eNB notices the MTC device whether the EAB had been enabled or not. If EAB had been enabled, the MTC device interrupts current RA procedure, reads EAB SIB, and then performs EAB.

Description

Method for updating instructions of system information and base using the same Station and user equipment

The present disclosure relates to a method for updating an indication of system information, a base station using the method, a user equipment (UE) using the method, and a communication system using the method.

Machine-Type Communication (MTC) has a very unique performance that enables the actual operation of the Internet of Things. MTC is defined as the exchange of information between a subscriber station (Subscriber Station) and a server (Server) via a base station, or between subscriber stations in the core network of a wireless communication system. Compared to Human to Human Communication (H2H), MTC can be performed without human interaction. As several industry reports have demonstrated the huge potential of this market, some broadband wireless access systems, such as 3GPP Long Term Evolution (LTE) and IEEE 802.16m, are also being developed to enhance this type of functionality in order to accommodate a large number of Machine to Machine communication (M2M) transmits communication.

Although machine-type communication enjoys the advantages of ubiquitous coverage, mobility support, broadband communication, and low cost through a general wireless communication architecture via a Cellular Network, the integration of devices using MTC may There will be a bottom, including devices that use MTC will need to be shared with the general user equipment (UE) used for H2H communication. Use restricted resources. Since the potential number of UEs with MTC type is considerable, a fast and efficient method may be needed to update the indicator of system information to avoid a large number of UEs with MTC type without wasting additional network resources. Changes and needs. For example, the use of a Random Access Channel (RACH) for performing uplink synchronization (Shlink Synchronization) and bandwidth requests may occur before any data transmission begins. An evolved Node B (eNB) or a base station may allocate a portion of its resources to a RACH that is shared among all UEs. Since a large number of MTCs can request access at the same time, RACH overloading may inevitably occur. Therefore, the communication network must adopt a fast method to reduce a large number of random accesses to prevent network overload.

Therefore, a communication network such as LTE has currently implemented an MTC specific access control mechanism, that is, an Extended Access Barring (EAB) mechanism, in order to cope with the case of RACH overload. The EAB mechanism is described below. First, each UE (including the MTC device) is assigned a random access number (Access Class; AC) from 0 to 9, which is stored, for example, in the Universal Subscriber Identity Module (USIM). in. When the EAB is initiated by the eNB to prevent access overload, the eNB broadcasts EAB information in a System Information Block (SIB), one of which is used to indicate the access level AC number to indicate the AC. Whether the number is allowed to access the Radio Access Network (RAN). If the EAB is initiated by the eNB, then the configuration The UE for the EAB will read the SIB containing the EAB information to check if it is under the EAB limit. If the UE is an AC number with access barring, then the UE will delay the operation of this access. If the UE is not an AC number with access barring, then the UE will be able to access the RAN via the EAB and normally. The evolved node eNB may enable EAB, deactivate the EAB, or adjust the EAB parameters. This eNB can make changes by modifying the system information of the eNB. This system information is usually written into the System Information Block (SIB) and broadcast to the UE within the coverage on a periodic basis. Information related to EAB is located in the SIB. System information can generally be changed by an eNB during the boundary of a Modification Period (MP). When the eNB decides to change the system information, the UE within the coverage of the eNB may be notified via paging, which may be applied for the entire modification period. In the next modification period, the eNB may transmit an SIB with updated system information. The UE generally does not acquire the SIB unless it includes an indicator in the paging message indicating that the modified system information message is received by the UE.

However, the traditional SIB update mechanism does not achieve a satisfactory level of results for, for example, an instant-based EAB to update system parameters. System information can be broadcast, for example, every 320 milliseconds. This broadcast period remains relatively short in order to accommodate UEs that frequently move in and out of the broadcast range without waiting for long periods of time to obtain system information. However, the eNB cannot make changes to the system information during each broadcast, because if so, it would mean that the UE must check the system information more frequently than necessary. Instead, the eNB can modify the system only at the boundary of the modification period (MP). Information, this can happen, for example, every 40 seconds. Due to this long modification period, it is quite difficult for the eNB to change the EAB parameters instantaneously in a situation where the random access (RA) load suddenly increases. The eNB may wish to start the EAB at the moment the RA load is heavy, rather than waiting until the next MP boundary changes the system information. Also, a long MP may make it difficult for the UE to adapt to the new EAB parameters in order to perform random access, since the eNB may wish to adjust the EAB parameters more frequently than allowed by the long MP. Therefore, there is a need for a new method of performing EAB updates without using the traditional SIB update mechanism.

Accordingly, the present disclosure proposes a method for an indication for updating system information, a base station using the method, a user equipment (UE) using the method, and a communication system using the method.

One of the various embodiments of the present disclosure proposes a method for receiving updated system information, which is applicable to a base station. An exemplary embodiment of the method includes initiating a first system event. System information including parameters of the first system event is periodically broadcast during the initiation of the first system event. Receiving a request access while the first system event is still starting. The reply is replied with a response message according to the received request. Initiating the initiation of the first system event corresponding to the response message replied to the request access.

The present disclosure is directed to a method for receiving updated system information for a user device, and an exemplary embodiment of the method includes prior to transmission The code initiates a resource configuration request to perform a first communication process. Receiving the received first response in response to the preamble. Based on the first response, determining whether a first system event has been initiated. While the first system event has been deactivated, transmission or reception is continuously performed according to a licensed resource configuration request. The first communication process is interrupted while the first system event is initiated.

The exemplary embodiments of the present disclosure are directed to a base station that includes a transceiver and a processor. The transceiver is configured to transmit and receive wireless signals. A processor is coupled to the transceiver and configured to determine if an access barring mechanism is initiated. If the access barring mechanism is initiated, the processor periodically broadcasts system information including parameters of the access barring mechanism via the transceiver during the initiation of the access barring mechanism. While the access barring mechanism is still enabled, at least one random access preamble is received via the transceiver during a request for random access. Corresponding to the random access preamble, replying to the random access response via the transceiver, and notifying the access prohibition mechanism via the random access response in response to the request for the random access Startup.

The exemplary embodiments of the present disclosure are directed to a user device that includes a transceiver and a processor. The transceiver is configured to transmit a random access preamble via the transceiver to initiate a random access procedure, receive a random access response via the transceiver, and determine access based on the received random access response Whether the disabling mechanism has been initiated, and interrupting the random access procedure after the access barring mechanism is determined to have been initiated.

An exemplary embodiment of the present disclosure further includes a communication system, The communication system includes a base station and at least one user equipment. This base station is configured to determine if the access barring mechanism is activated. If the access barring mechanism has been initiated, the base station periodically broadcasts system information including parameters of the access barring mechanism during the initiation of the access barring mechanism. The user equipment sends a request random access to the base station including a random access preamble. The base station responds to the received request random access and responds to a random access response message to respond to the request random access via the random access response message to notify the access prohibition mechanism. start up.

The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims.

In the present disclosure, similar 3GPP keywords or words are only used as an implementation example of the present disclosure concept. However, the same or similar concepts presented in this disclosure can be applied by any person skilled in the art to any other system such as IEEE 802.11, IEEE 802.16, WiMAX or other similar technology.

Among the terms used in the disclosure, for example, "eNodeB" or "eNB" may be a base station (BS), a Node-B, an advanced base station (ABS), a base transceiver system (Base). Transceiver System; BTS), Access Point, Home Base Station, Relay Station, Scatterers, repeaters, intermediate nodes, intermediates, and/or satellite-based communication base stations, and the like. The term "user equipment" (UE) in the disclosure may be, for example, a mobile station, an advanced mobile station (AMS), a server, a client, a desktop computer, a laptop computer, or a network. Road computer, workstation, Personal Digital Assistant (PDA), Tablet PC (Personal Computer; PC), scanner, telephone device, pager (Pager), camera, TV, handheld video game device (Hand-held Video Game Device), music device, wireless sensor, and the like. In some applications, the UE may be a stationary computer device that operates in a mobile environment, such as a bus, train, airplane, boat, car, and the like.

In the disclosure, a method of updating a system information indicator (System Information Indicator) is proposed in the case of Extended Access Barring (EAB) for a Long Term Evolution (LTE) wireless communication network. However, the proposed method is not limited to EAB, but can be applied to other system events or to other wireless communication networks capable of adopting this method.

Currently, as Machine-Type Communication (MTC) becomes more prevalent, the Extended Access Ban (EAB) mechanism has been specifically applied in the case of no radio access network (RAN) overload. Adapt to a large number of machine to machine communication (M2M). For example, under the LTE wireless communication network, the eNB notifies all of its coverage via paging. The UE related EAB has been started, and the EAB parameters can be obtained from the SIB located in the broadcasted system information. However, since the system information is modified for a long time and may cope with the surge of random access RA (RA) requirements, a method is proposed to perform the EAB to prevent the RAN from being overloaded without modifying the time period.

The proposed method allows the MTC type UE to ignore the modification period and assumes that the EAB has been deactivated and directly transmits the Preamble for the RA. Regardless of whether the EAB is activated, the UE will also begin random access RA by transmitting the preamble to the eNB. When the current code is received by the eNB, the eNB immediately responds with a Reply Message, which may include a notification to inform the message UE as to whether the EAB has been initiated.

If the EAB has been initiated, the MTC device will then interrupt the first communication process (ie, the RA process). In addition, the MTC device under the EAB will read the SIB containing the EAB parameters and then apply this EAB. If the EAB disables the MTC device, then the MTC device will then begin a second communication procedure that can include the first sub-action and the second sub-action. If the EAB does not disable the MTC device, the MTC will start another RA procedure.

This notification architecture is different from the general conventional method in that the eNB pages the UE to inform the UE that the system information containing the EAB parameters has changed. If the EAB parameters are changed under the conventional method, all UEs including normal H2H UEs will need to obtain new system information from the eNB without delay, since the new system information can be after the subsequent MP boundary. To be effective. However, for the method of the present disclosure, it is only necessary to update the eNB's system. The UE of the unified information is notified that the UE to which the EAB applies is excluded.

For the implementation of a normal RA without EAB between the eNB and the UE, reference may be made to the following content. The UE may initiate the RA procedure via the code selecting the preamble and transmit the preamble code to the eNB. When the current coded code is received by the eNB, the eNB will reply to the UE with a Random Access Response (RAR) message associated with the code of the preamble. The RAR message may include an uplink grant to the UE and other necessary information for accessing the wireless network. After the uplink (UL) grant is received by the UE, the UE may then transmit a Request Message containing the identity of the UE to the eNB using the resource configuration as indicated by the uplink grant to request from the eNB RA.

When the request message is received by the eNB, the eNB replies to the UE with the second response message, and the second response message includes the identity information carried in the received request message. After the second response message is received by the UE, the UE may compare its own identity information with the received identity information. If the identity information of the UE matches the received identity information, the UE can know that the data is provided to the UE, and the RA process will be successfully completed. Otherwise, the UE will wait for a predetermined period of time (first period) after performing a Back-off Mechanism to try another RA.

However, if the EAB is activated, an indicator specific to indicate the initiation of the EAB may exist in the RAR message transmitted from the eNB to the UE. This message only indicates that the EAB has been started, and the eNB can update the EAB parameters in the system information without paging the UE. RAR messages can be encoded in packet data or via media access control protocols Data Access Control Protocol Data Units (MAC PDUs). This MAC PDU contains a MAC header followed by a MAC data field (Payloads), and the MAC header further contains a plurality of sub-headers. In the MAC subheader, there are two reserved bits (Reserve Bits) available in one embodiment to indicate whether the EAB has been started. Also, since any UE requesting the RA will need to read the MAC header anyway, using the reserved bits in the MAC subheader will not incur any additional burden. When the UE receives the RAR message, it will decode the MAC PDU from the RAR message and read the two reserved bits in the MAC subheader. If the EAB has been found to be valid, the UE will read the SIB containing the EAB parameters and perform all necessary subsequent operations under the EAB.

FIG. 1 illustrates a wireless communication system in accordance with an exemplary embodiment. According to a wireless communication standard, a wireless communication system includes an eNodeB (101) in communication with at least one UE (103, 105, ... 10x). Each UE contains, for example, at least one transceiver circuit (111), an analog to digital (A/D)/digital to analog (D/C) converter (113), and processing circuitry (115). The transceiver circuit (111) is capable of transmitting uplink signals and/or receiving downlink signals in a wireless manner. The transceiver circuitry (111) may also perform operations such as low noise amplification, impedance matching, frequency mixing, up or down frequency conversion, filtering, amplification, and the like. The transceiver circuit (111) also includes an antenna unit (112). An analog to digital (A/D)/digital to analog (D/C) converter (113) is configured to convert from analog signal format to digital signal format during downlink signal processing, and in uplink signal processing The period is converted from a digital signal format to an analog signal format. Processing circuit (115) A process for processing a digital signal and performing the proposed method for data transmission in accordance with an exemplary embodiment of the present disclosure is configured. Again, the processing circuit (115) may include a memory circuit (116) for storing data or recording a configuration specified by the eNB (101). The eNB (101) contains similar components including a transceiver unit (121), an antenna unit (122), and an analog to digital (A/D)/digital to analog (D/C) converter (119) for The converted digital signal is processed by its processing circuitry (117) and uses memory circuitry (118) to implement a method for data transmission in accordance with an exemplary embodiment of the present disclosure.

2 illustrates an RA procedure performed between an eNB (275) and a UE (250), according to one of the exemplary embodiments. In step 201, the UE (250) randomly selects the code of the preamble and transmits it to the eNB (275) in the RA message (201) containing the code of the preamble and the self identification RA-RNTI. . When the eNB (275) receives the RA message (201), it may reply to the RAR message (203) within a time window as indicated by the parameter ra-ResponseWindow Size, for example, after 3 milliseconds, which may be 2, 3, 4, 5, 6, 7, 8 or 10 sub-frames. The RAR message (203) is encoded in a subframe, wherein each subframe has a control region and a data region. The PDCCH in the control region carries control information with the RA-RNTI identifier to identify the target of the RAR message (203), and the PDSCH in the data region contains MAC PDUs carrying data containing uplink grants. Payload.

After the UE (250) receives the RAR message (203), the UE (250) can read the reserved bits in the MAC sub-header of the MAC PDU. Meta, this reserved bit contains metrics about whether EAB has started. If the UE (250) learns that the EAB has been initiated, the UE (250) interrupts the normal RA procedure and instead performs the EAB procedure. If the EAB has not been initiated, the UE (250) may use the resource configuration information indicated by the uplink grant to transmit the message Msg3 (205) to the eNB (275) to request the RA. The Msg3 (205) transmitted by each UE may also contain unique self-identity information such as s-TMSI values. The eNB (275) may then transmit the message Msg4 (207) in the downlink design with the payload intended for the UE (250). Msg4 (207) may also contain identity information received from Msg3 (205). If the UE (250) finds identity information matching its own identity information in message Msg4 (207), the UE (250) has discovered the payload intended for the UE (250). At this point, the RA process is then completed. Otherwise, the UE may wait via the execution of the fallback mechanism before attempting to try another RA.

3 illustrates the use of an RAR message indicating whether an EAB is enabled in one of the exemplary embodiments. RAR messages can contain a lot of package data. The packet data unit or MAC PDU (300) may contain a MAC header (301) followed by a MAC data field (Payloads) (303). The MAC data field of the RAR message contains information about the RAR message and Optional Padding. Each subframe of the RAR message (MAC RAR1, MAC RAR2...MAC RARn) is read by the UE with the specific RA-RNTI information, and each subframe of the RAR message can be intended for a different UE.

The MAC header (301) contains a number of subheaders (305). Each subheader (307) contains at least 5 bits (Bits), and the at least 5 bits are charged. When the indicator is used, such as to indicate the subheader type and whether the subheader no longer exists. Within each subheader (307), there may be two reserved bits (309). Either of the two reserved bits (309) can be used to indicate if the EAB is activated. For example, a reserved bit with a binary value of 1 may be valid for EAB, and a binary value of 0 may mean that EAB is not valid. If the EAB is found to be valid, then the UE will read the SIB and perform the EAB procedure. If the EAB is not valid, the UE will continue the normal RA procedure. In the case of an LTE wireless network, since the use of reserved bits in the RAR message is based on the current architecture of LTE, backward compatibility can be maintained.

A more detailed RA procedure under the EAB in accordance with an exemplary embodiment is as follows. Referring to FIG. 4, first, the eNB detects whether the RACH is congested under a plurality of RA requirements. After detecting the congestion, the eNB starts the EAB to prohibit access to certain UEs (such as UEs of the MTC type). After the EAB has been initiated, the UE of the MTC device requests the RA procedure at time point T401, but by doing so, the UE may first assume that the EAB is deactivated by transmitting the preamble directly to the eNB. When the current code is received by the eNB, the RAR message containing the indicator indicated by the reserved bit of the MAC header is sent back from the eNB to the UE. After the UE receives the RAR message, the UE may determine whether the EAB is initiated by reading the reserved bit in the RAR message.

If the EAB is deactivated, the UE will perform the RA as normal. However, since EAB has been enabled in the situation of FIG. 4 at time point T401, after receiving the RAR message, at time point T403, the UE will read SIB1 to locate in the EAB SIB. In other words, the UE will read to disclose another SIB. The first system information sub-block SIB1 of the location of the second system information sub-block or EAB SIB containing the EAB parameters. SIB1 is the first of the 13 system information blocks (SIB1-SIB13). At time point T405, the UE reads the EAB SIB to obtain the EAB parameters, which may include the duration of the access barring. At time point T405, if the UE finds itself to be disabled by the EAB, the UE will wait for the prohibition time to expire before reading the EAB parameters contained in the EAB SIB again. At time point T407, after the prohibition time expires, the UE reads SIB1 again to locate the EAB SIB and read the EAB SIB. At time point T409, the UE finds itself via the EAB, even though the EAB may still be valid. After learning that it is no longer prohibited by the EAB, the UE can perform a recurring duration of randomness before attempting a normal RA.

The backoff period refers to a random time period (second time period) selected according to the statistical distribution in an embodiment. According to the statistical distribution, the latency of the user equipment is evenly distributed over time for user devices that are also via the access barring mechanism. In other words, different user devices just coming out of the EAB will wait for different time periods that are randomly selected according to the statistical distribution. If there is no random backoff, then all of the multiple MTC UEs can immediately try the RA and thus overload the RAN. After a random backoff, the UE will have a normal RA until it is again disabled during the EAB duration.

FIG. 5 illustrates a method of updating an indication of system information during an RA procedure under an EAB from the perspective of a UE, according to an exemplary embodiment. A UE presets parameters containing cached system information, and the parameters of the cached system information are obtained by periodic broadcast by the eNB. If needed, at The system information parameters are updated every predetermined time period. However, in the case that the normal system information update mechanism is interrupted due to the activation of the EAB, the UE will directly transmit the preamble to the eNB for RA in step 501, which will also be under normal circumstances. occur.

In step 503, the UE receives a RAR message from the eNB. The RAR message contains an indication of whether the EAB has been started. In step 505, the UE determines if the EAB has been initiated by the eNB. If EAB is not enabled, the UE continues to perform RA normally. If the EAB is initiated, then in step 507, the UE interrupts the RA procedure. Next, in S509, the UE reads SIB1 and then discovers the EAB SIB containing the EAB parameters. After reading the EAB SIB, the UE then decides in S513 whether it has been disabled by the EAB. If the UE is disabled, then in S511, the UE will return to step 509 to read SIB1 again after the waiting forbidden time expires. If the UE has not been disabled by the EAB, the UE performs a backoff of a random duration in step 515 and then performs a normal RA. The effect of the backoff can alleviate the congestion of RA attempts by a large number of UEs when the UE is passing through the EAB.

6 is a diagram for explaining a method of updating an indication of system information during an RA procedure under an EAB from the perspective of an eNB, according to an exemplary embodiment. In step 601, the eNB periodically broadcasts parameters of the system information, and in step 603, the eNB updates the system information every predetermined time period as necessary. In step 605, the eNB determines if the EAB should be initiated based on considerations as to whether network overloading may occur. If the EAB is not activated, then in step 621, the eNB receives the preamble for the RA from the UE and in step 623 replies the RAR message to indicate the normal RA to the UE.

If, in step 605, the eNB has determined that the EAB should be initiated, the eNB updates the system information immediately without notifying the UE. Next, in step 611, the UE receives a preamble for the RA from the UE. In step 613, the eNB replies to the UE with an RAR message with an indicator indicating the EAB and does not continue the normal RA. The method of the present disclosure has one or at least one or more advantages, but is not limited thereto. At least one of the advantages has no effect on this method for normal UEs or for MTC devices that do not request RA. Under conventional methods involving paging, all UEs will need to decode EAB information from the broadcasted system information, even if the EAB has no correlation for non-MTC UEs that do not request RA. With the proposed method, updating the EAB notification does not entail an additional burden, since the reserved bits in the MAC header are used and the reserved bits will be read by any UE requesting the RA in any manner. Unlike conventional methods, this proposed method does not have the problem of adapting the latency of updated EAB information. This proposed method may not require the UE to acquire the SIB unnecessarily, except when the EAB has been enabled. As also mentioned previously, the proposed method does not have the problem of attempting an aggregated RA while the EAB is no longer applicable. In view of the foregoing description, the present disclosure is applicable to wireless communication systems and is capable of instantaneously updating metrics of system parameters as necessary, while maintaining backward compatibility, without the need for additional overhead or unnecessary system information acquisition. Therefore, via an EAB algorithm with an excellent design, EAB can be performed optimally and potential network overload can be avoided.

The present disclosure has been disclosed in the above preferred embodiments, but it is not intended to limit the disclosure, and anyone skilled in the art can avoid the spirit of the disclosure. And the scope of protection of this disclosure is subject to the definition of the scope of the patent application.

103,105,...10x‧‧‧User Equipment (UE)

101‧‧‧eNodeB

111, 121‧‧‧ transceiver circuit

113, 119‧‧‧ analog to digital (A/D) / digital to analog (D / C) converter

115, 117‧‧‧ processing circuit

122‧‧‧Antenna unit

116, 118‧‧‧ memory circuit

117‧‧‧Antenna unit

275‧‧‧Evolved Node B (eNB)

250‧‧‧User Equipment (UE)

201‧‧‧RA message

203‧‧‧RAR message

205‧‧‧Msg3 message

207‧‧‧Msg4 message

300‧‧‧Media Access Control Protocol Data Unit (MAC PDU)

301‧‧‧MAC header (Header)

303‧‧‧MAC data column (Payloads)

305‧‧‧MAC subheader

307‧‧‧Subheader

309‧‧‧Two reserved bits

1 illustrates a wireless communication system including one of a plurality of exemplary embodiments in accordance with the present disclosure, the wireless communication system including an eNB in communication with at least one UE.

2 illustrates a random access (RA) process in accordance with one of many exemplary embodiments of the present disclosure.

3 illustrates a schematic diagram of one of the multiple exemplary embodiments of the present invention using a MAC header of a RAR message to indicate system events.

4 illustrates a schematic diagram of an RA process under system events, such as EAB, in accordance with one of various exemplary embodiments of the present disclosure.

FIG. 5 illustrates a schematic diagram of an RA process under EAB from the perspective of a UE, in accordance with one of various exemplary embodiments of the present disclosure.

6 illustrates a schematic diagram of an RA process under EAB from the perspective of an eNB, in accordance with one of various exemplary embodiments of the present disclosure.

103,105,107,10x‧‧‧User Equipment (UE)

101‧‧‧eNodeB

111, 121‧‧‧ transceiver circuit

113, 119‧‧‧ analog to digital/digital to analog converter

115, 117‧‧‧ processing circuit

112‧‧‧Antenna unit

116, 118‧‧‧ memory circuit

122‧‧‧Antenna unit

Claims (30)

A base station includes: a transceiver configured to transmit and receive wireless signals; and a processor coupled to the transceiver, wherein the processor is configured to determine whether an access barring mechanism is activated, Wherein, if the access barring mechanism is activated, the processor periodically broadcasts system information including parameters of the access barring mechanism via the transceiver during the startup of the access barring mechanism Receiving, by the transceiver, at least one random access preamble, corresponding to the random access preamble, during the request for random access, while the access prohibition mechanism is still activated, The device replies to the random access response and notifies the initiation of the access barring mechanism via the random access response in response to the request for the random access. The base station of claim 1, wherein after the initiating the access barring mechanism, the processor further comprises: writing the parameter of the access barring mechanism to the system information And updating the parameters of the access barring mechanism in the system information without paging. The base station of claim 1, wherein the random access response comprises an indicator configured in a header of the packet data unit, wherein the indicator is used to indicate whether the access prohibition mechanism is activated. The base station of claim 3, wherein the indicator is located in the packet according to a format of a long term evolution LTE wireless communication system. A reserved bit in each subheader of the header of the data unit. The base station of claim 1, wherein the access barring mechanism is an extended access barring EAB for a long term evolution LTE wireless communication system. A method for updating an indication of system information, suitable for a base station, wherein the method includes: initiating a first system event; periodically broadcasting the first including during the initiating of the first system event a system information of a parameter of the system event; receiving a request access while the first system event is still being initiated; responding with a response message according to the received request access; and corresponding to accessing the request The response message in response to notifying the initiation of the first system event. The method of claim 6, wherein after the initiating the first system event, the method further comprises: writing the parameter of the first system event to the system information; In the case of no paging, the parameters of the first system event in the system information are updated. The method of claim 6, wherein the response message comprises an indicator configured in a header of a packet data unit, the identifier is obtained by using the packet data in a format according to a long term evolution LTE wireless communication system. A reserved bit in each subheader of the unit's header, wherein the indicator is used to indicate whether the first system event is initiated. The method of claim 6, wherein the first system event is an extended access barring event according to a Long Term Evolution (LTE) wireless communication system. A communication system comprising a base station and a user equipment, wherein the base station is configured to determine whether an access barring mechanism is activated; and if the access barring mechanism has been initiated, the base station is in the Periodically broadcasting system information including parameters of the access barring mechanism during the start of the prohibition mechanism, the user equipment transmitting a request random access to the base station including a random access preamble, The base station responds to the received request random access and responds to a random access response message to respond to the request random access via the random access response message to notify the access prohibition mechanism. start up. A user equipment comprising a transceiver and a processor, wherein the transceiver is configured to transmit and receive wireless signals; and the processor is coupled to the transceiver, the processor configured to Transmitting, by the transceiver, a random access preamble to initiate a random access procedure, receiving, by the transceiver, a random access response message, based on the random access response message, to determine whether an access barring mechanism has been activated, And interrupting the random access process after the access barring mechanism is determined to have been initiated. The user equipment as described in claim 11 of the patent application, wherein The processor is further configured to read a parameter of the access barring mechanism from the received system information when the access barring mechanism has determined to have been initiated; and execute the access barring mechanism. The user equipment of claim 12, wherein the performing an access prohibition mechanism comprises: determining, based on the received system information, whether the user equipment is prohibited by the access prohibition mechanism; The user equipment is prohibited by the access prohibition mechanism, and then waits for a first period of time to expire. The user equipment of claim 13, wherein the configuration of the processor further comprises: if the user equipment is not prohibited by the access prohibition mechanism, then another random save is initiated The process proceeds to continue the random access process. The user equipment of claim 13, wherein the configuration of the processor further comprises: updating the access prohibition via the received system information after waiting for the expiration of the first time period a parameter of the mechanism; determining whether the user device is via the access barring mechanism while the access barring mechanism is still activated; and if the user device is still disabled by the access barring mechanism, then again The access barring mechanism is executed. The user equipment as claimed in claim 15 of the patent application, wherein The configuration of the processor further includes waiting for a second time period if the user device is via the access barring mechanism, wherein the second time period is a random selection period according to a statistical distribution, the statistical distribution A uniform distribution waiting period for a plurality of user devices is included, and the random access process is resumed after waiting for the second time period to end. The user equipment of claim 11, wherein the random access response message includes an indicator disposed in a header of a packet data unit, wherein the indicator is used to indicate the access Whether the prohibition mechanism is activated. The user equipment of claim 17, wherein the indicator is a reserved bit in each subheader of the header of the packet data unit, wherein the packet data unit is based on The format of the Long Term Evolution LTE wireless communication system. A method for receiving updated system information, suitable for a user equipment, the method comprising: initiating a resource configuration request via a transmission preamble to perform a first communication process; receiving a location in response to the preamble Receiving a first response; determining, based on the first response, whether a first system event has been initiated; continuously transmitting or receiving according to a licensed resource configuration request while the first system event has been deactivated; The first communication process is interrupted while the first system event is initiated. The method of claim 19, wherein the step of determining whether the first system event has been initiated based on the received first response comprises: reading from the received first response A header of the decoded packet data, and determining whether the first system event has been initiated based on the received first response. The method of claim 20, wherein reading the header of the packet data decoded from the received first response comprises: reading from the received first response decoded a reserved bit within each subheader of the header of the packet data, wherein the format of the packet data is according to a Long Term Evolution (LTE) wireless communication system and the reserved bit is used to indicate whether the first system event has start up. The method of claim 19, wherein the method further comprises: after interrupting the first communication process, reading parameters of the first system event by accessing the received system information; The parameter of the first system event performs a second communication process. The method of claim 22, wherein the step of performing the second communication process according to the parameter of the first system event comprises: according to the parameter of the first system event, Determining whether the user equipment is affected by the first system event; if the user equipment is affected by the first system event, then The first sub-action of the second communication process is performed, otherwise the first communication process is initiated. The method of claim 23, wherein the first sub-action of the second communication process comprises: waiting for a first time period; and after expiration of the first time period, via the received The system information updates parameters of the first system event. The method of claim 24, further comprising: determining whether the user equipment is affected by the first system event after the parameter of the first system event has been updated, if Said user equipment is still affected by said first system event, then performing said second communication process, if said user equipment is no longer affected by said first system event, then performing said second communication process The second child action. The method of claim 25, wherein the second sub-action comprises: waiting for a random selection of a second time period according to a statistical distribution, the statistical distribution containing a uniform distribution of time for a plurality of user devices over time Time period. The method of claim 19, wherein the first communication process is a random access procedure according to a Long Term Evolution (LTE) wireless communication system. The method of claim 19, wherein the first system event is an extended access according to a Long Term Evolution (LTE) wireless communication system. EAB events are prohibited. The method of claim 19, wherein the first response is a random access response according to a Long Term Evolution (LTE) wireless communication system. The method of claim 22, wherein the step of reading the parameter of the first system event comprises: reading a first system information sub-block from the broadcasted system information; Obtaining, by the first system information sub-block, a location of the second system information sub-block; and obtaining the parameter of the first system event from the second system information sub-block.