CN102256280A - Random access method and equipment thereof - Google Patents

Abstract

Embodiments of the present invention relate to random access methods and devices. The method includes: according to the random access detection threshold, judging whether the user equipment initiates random access; if it is judged that the user equipment initiates random access, sending a random access response to the user equipment; judging that after sending the random access response, Whether the radio resource control connection request sent by the user equipment is received; if the radio resource control connection request is not received, it is determined that the user equipment is a false access, and the number of false accesses is accumulated; when the accumulated number of false accesses exceeds the preset When the first threshold is set, notify the user equipment in the cell to increase the initial access power, and/or increase the random access detection threshold. According to the embodiment of the present invention, by judging that the accumulated number of false access exceeds the first threshold, and thus increasing the initial access power of the user equipment and/or increasing the random access detection threshold, the occurrence of false access can be suppressed and the user equipment can be improved. access success rate.

Description

Random access method and device

technical field

The embodiments of the present invention relate to the communication field, and more specifically, to a random access method and device.

Background technique

In the Long Term Evolution (hereinafter referred to as LTE), in order to improve spectrum utilization, the same frequency networking is generally adopted, and frequencies between adjacent cells are completely reused.

LTE defines three kinds of uplink channels: Physical Uplink Shared Channel (Physical Uplink SharedChannel, hereinafter referred to as PUSCH), Physical Uplink Control Channel (Physical Uplink ControlChannel, hereinafter referred to as PUCCH) and Physical Random Access Channel (Physical Random Access Channel, hereinafter referred to as PRACH) . In addition, two kinds of uplink reference signals are defined: demodulation reference signal (Demodulation Reference Signal, hereinafter referred to as DMRS) and sounding reference signal (Sounding Reference Signal, hereinafter referred to as SRS). The PUSCH channel is used for uplink data transmission, the PUCCH channel is used for user uplink signaling transmission, and the PRACH is used for user equipment (User Equipment, hereinafter referred to as UE) random access. DMRS is used for measurement and demodulation related to PUSCH and PUCCH, and SRS is used for measurement of uplink channel information.

In LTE, RACH is mainly used for initial access of UE, it does not carry any user data, and RACH is sent through physical random access channel (PRACH). The signal sent by the UE on the PRACH channel is a preamble sequence (Preamble Sequence, hereinafter referred to as Preamble). The leader sequence is Zadoff-Chu sequence (hereinafter referred to as ZC sequence).

After accessing, the UE will periodically send SRS signals to the base station according to the configuration of the base station. Since the SRS is also a ZC sequence, it will interfere with the signals of neighboring cells (such as PRACH, etc.) under certain circumstances. The base station in the neighboring cell mistakenly thinks that the UE requests access.

The UE sends the PRACH sequence according to the time-frequency resources configured by the base station, and the base station performs periodic detection according to the same configuration, uses the local sequence to correlate with the received signal, and judges whether there is a user who needs to access by detecting whether the peak value exceeds the detection threshold. Since the setting of the detection threshold is obtained under simulation according to a certain channel model, there may be unexpected interference in the actual system (such as the SRS signal sent by the UE in the neighboring cell, etc.), so there is always an interference in the actual system. A certain probability of false access means that users who do not really need to access, such as UEs in neighboring cells, may be detected. When there are a large number of false accesses, the access success rate of the UE will decrease.

Contents of the invention

One of the technical problems to be solved by the embodiments of the present invention is to suppress false access of user equipment caused by interference in a cell, and improve the success rate of initial access of user equipment.

According to an embodiment of the present invention, a random access method is proposed, wherein the method includes:

According to the random access detection threshold, determine whether the user equipment initiates random access;

If the judgment result is that the user equipment has initiated random access, sending a random access response to the user equipment;

judging whether a radio resource control connection request sent by the user equipment is received after sending the random access response;

If the radio resource control connection request sent by the user equipment is not received, determine that the user equipment is false access, and accumulate the number of false access;

When the accumulated number of false accesses exceeds the preset first threshold, notify the user equipment in the cell to increase the initial access power, and/or increase the random access detection threshold.

According to an embodiment of the present invention, a base station is proposed, wherein the base station includes:

The first judging unit is configured to judge whether the user equipment initiates random access according to the random access detection threshold;

a sending unit, configured to send a random access response to the user equipment when the judgment result of the first judging unit is that the user equipment has initiated random access;

a second judging unit, configured to judge whether the radio resource control connection request sent by the user equipment is received after the sending unit sends the random access response;

An accumulating unit, configured to determine that the user equipment is a false access and accumulate the number of false accesses when the result of the judgment by the second judging unit is that the radio resource control connection request sent by the user equipment is not received;

A control unit, configured to notify user equipment in the cell to increase initial access power, and/or increase the random access detection threshold when the number of false accesses accumulated by the accumulating unit exceeds a preset first threshold .

According to the embodiment of the present invention, by judging that the accumulated number of false access exceeds the first threshold, and thus increasing the initial access power of the user equipment and/or increasing the random access detection threshold, the occurrence of false access can be suppressed and the user equipment can be improved. access success rate.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor. In the attached picture:

FIG. 1 is a signaling interaction diagram during a random access process;

Fig. 2 is the flowchart of the embodiment method of the present invention;

Fig. 3 is a flow chart of a specific scheme of the embodiment method of the present invention;

Fig. 4 is a flow chart of another specific solution of the embodiment method of the present invention;

Fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

User equipment (UE, User Equipment), also called mobile terminal (MobileTerminal), mobile user equipment, etc., can communicate with one or more core networks via a radio access network (for example, RAN, Radio AccessNetwork). The devices may be mobile terminals, such as mobile telephones (or "cellular" telephones) and computers with mobile terminals, such as portable, pocket, hand-held, built-in computer, or vehicle-mounted mobile devices, which communicate with wireless interfaces. Access the network to exchange language and/or data.

The base station may be an evolved base station (eNB or e-NodeB, evolutional NodeB) in LTE.

Usually, the base station broadcasts the initial access power of the user equipment (User Equipment, referred to as "UE") through a system message (System Information Block, referred to as "SIB"), and the UE adjusts the power of sending the preamble ID (Preamble ID) according to the downlink path loss. In order to ensure that the power of each UE when reaching the base station is basically the same. Generally speaking, the base station uses a fixed detection threshold to detect user access status, and does not adjust the initial access power of the UE, but directly discards users exceeding the specification according to the processing capability of the system. When the UE fails to access for the first time, the UE will increase the transmit power and try to access again.

In order to solve the problems existing in the prior art, the embodiments of the present invention provide various implementation solutions, which are described in detail as follows.

FIG. 1 is a signaling interaction diagram involved in a random access method. As shown in Figure 1, the UE sends a random access preamble to the eNB. After receiving the random access preamble sent by the UE, the eNB will send a random access response to the UE. If a real UE sends a random access request, the UE will return a Radio Resource Control Connection Request (RRCConnection Request for short). Based on this, the eNB can determine that the random access request is a real random access. On the contrary, if the RRC Connection Request is not received, the eNB considers the random access as false access.

Fig. 2 is a flowchart of a random access method 200 according to an embodiment of the present invention. as shown in picture 2,

210: The base station judges whether the user equipment initiates random access according to the random access detection threshold;

Generally speaking, the base station sends the initial access power of the UE to the UE through the SIB message. The UE sends a random access request to the base station according to the initial access power, and the random access request appears as a ZC sequence. After receiving the random access ZC sequence sent by the UE, the base station performs correlation processing and other processing with the local reference root sequence. After processing, the peak value in the corresponding window is higher than the random access detection threshold, and it is considered that there is a random access request. The random access higher than the random access detection threshold is reported to the upper layer of the base station for subsequent processing. In this process, since the interference signal sent by the UE in the neighboring cell is also a ZC sequence, when the interference signal is strong, the base station may think that the UE in the neighboring cell also initiates a random access request.

220: If the judging result is that the user equipment has initiated random access, send a random access response to the user equipment.

230: Determine whether a radio resource control connection request sent by the user equipment is received after the random access response is sent.

240: If the radio resource control connection request sent by the user equipment is not received, determine that the user equipment is a false access, and accumulate the number of false accesses.

The base station determines whether the UE's random access is false access according to whether it receives the RRC ConnectionRequest sent by the UE after sending the random access response, and if it is false access, accumulates the number of false accesses.

250: When the accumulated number of false accesses exceeds a preset first threshold, notify user equipment in the cell to increase initial access power, and/or increase the random access detection threshold.

According to an embodiment of the present invention, when the accumulated number of false accesses exceeds a preset first threshold, the random access detection threshold may be increased. In this case, the peak value of most low-power false access ZC sequences will be lower than the random access detection threshold, and the base station will not consider these ZC sequences as access requests, so the number of false accesses can be effectively reduced. At the same time, the first access request of some UEs fails due to the increase of the random access detection threshold. In this case, the UE can automatically increase the access power and send the access request again, so the subsequent access can be successful.

According to the embodiment of the present invention, the UE may be notified to increase the initial access power while increasing the random access detection threshold. In this case, the base station can notify the UE to increase the initial access power in two ways. One is that a notification message may be sent to the UE in the cell, and the user equipment in the cell is notified to increase the initial access power through the notification message. The other is that the base station can broadcast the increased initial access power to the UEs in the cell through the SIB message.

According to the embodiment of the present invention, by judging that the accumulated number of false access exceeds the first threshold, and thus increasing the initial access power of the user equipment and/or increasing the random access detection threshold, the occurrence of false access can be suppressed and the user equipment can be improved. access success rate.

According to the embodiment of the present invention, in the case of synchronously increasing the random access detection threshold and notifying the user equipment in the cell to increase the initial access power, the range of increasing the initial access power of the user equipment in the notified cell is based on the It is set according to the increase range of the random access detection threshold.

According to the embodiment of the present invention, before notifying the user equipment in the cell to increase the initial access power, it is judged whether the initial access power of the user equipment has been adjusted to the preset upper limit of the initial access power, if the result of the judgment is If not, notify the user equipment in the cell to increase the initial access power.

According to an embodiment of the present invention, when the number of false accesses is lower than the preset second threshold, the user equipment in the cell is notified to reduce initial access power, and/or, the random access detection threshold is reduced. According to the embodiment of the present invention, optionally, when the accumulated false access is lower than the preset second threshold, the UE in the cell is notified to lower the random access detection threshold. In this case, the success rate of UE's initial access can be improved. According to the embodiment of the present invention, the UE may also be notified to reduce the initial access power while reducing the random access detection threshold. In this way, the power used by the UE for random access can be reduced, and thus the power consumption of the UE and the interference of the UE to adjacent cells can be reduced.

Similarly, the base station can notify the UE to reduce the initial access power in two ways. One is that a notification message may be sent to the UE in the cell, and the user equipment in the cell is notified to reduce the initial access power through the notification message. The other is that the base station can broadcast the reduced initial access power to the UEs in the cell through the SIB message.

According to the embodiment of the present invention, in the case of synchronously reducing the random access detection threshold and notifying the user equipment in the cell to reduce the initial access power, the magnitude of reducing the initial access power for the user equipment in the notified cell is based on the It is set according to the reduction range of the random access detection threshold.

According to the embodiment of the present invention, before notifying the user equipment in the cell to reduce the initial access power, it is judged whether the initial access power of the user equipment has been adjusted to the preset initial access power lower limit, if the result of the judgment is If no, notify the user equipment in the cell to reduce the initial access power.

The principles of the embodiments of the present invention are further described below in combination with specific implementation solutions of the embodiments of the present invention. Fig. 3 is a flowchart of a random access method according to an embodiment of the present invention. As shown in Figure 3,

310: The eNB air interface issues the initial access power of the UE.

320: The eNB judges whether the UE initiates random access according to the random access detection threshold. If the judging result is that the UE initiates random access, step 330 is performed.

330: The eNB sends a random access response to the UE.

340: The eNB judges whether it has received the RRCConnection Request sent by the UE after sending the random access response.

If the RRC Connection Request sent by the UE is received, the eNB considers that this access is a real random access, and returns to step 320. If the RRCConnection Request sent by the UE is not received, it is determined that this access is false access, and step 350 is performed.

350: Accumulate the number of false accesses;

360: Judging whether the predetermined detection period (for example, 1 minute) is exceeded, and if the judgment result is that the predetermined detection period is exceeded, perform step 370 .

370: Determine whether the accumulated number of false accesses exceeds a preset first threshold (for example, 100 times). If the preset first threshold is not exceeded, reset the detection period and return to step 320 . If the judgment result is that the preset first threshold is exceeded, step 380 is executed.

380: Determine whether the initial access power exceeds a preset initial access power upper limit (eg -10dmb). If the judging result is that the preset initial access power upper limit has been reached, then report to the high level of the base station and the method ends. If the judgment result is that the preset initial access power upper limit has not been reached, step 390 is performed.

390: Increase the initial access power by one step (for example, 2db), and increase the random access detection threshold by one step at the same time. As mentioned above, the step size of increasing the random access detection threshold may be determined according to the step size of increasing the initial access power.

The eNB may broadcast the new increased initial access power to the UEs in the cell through the SIB message.

According to the embodiment of the present invention, by judging whether the RRC Connection Request sent by the UE is received after sending the random access response, it is determined whether it is a real random access of the UE, which ensures the reliability of the judgment result; Accumulate the number of false accesses in the detection period, which can maintain the stability of the system and avoid frequent changes in the initial access power; broadcast the new increased initial access power to UEs in the cell through the SIB message, which can be easily unified Increase the initial access power of all UEs in the cell; before increasing the initial access power of the UE, it can provide a protection by judging whether the initial access power has been adjusted to the preset upper limit of the initial access power Mechanism to avoid system failure or damage to the UE caused by too high initial access power; increase the initial access power through a preset step size, allowing precise control of the system; the step size of the random access detection threshold increase It can be determined according to the increase step size of the initial access power, which can improve the stability of random access detection threshold adjustment.

Fig. 4 is a flowchart of another specific implementation scheme of the embodiment of the present invention, as shown in Fig. 4:

410: The eNB air interface issues the initial access power of the UE.

420: The eNB judges whether the UE initiates random access according to the random access detection threshold. If the judging result is that the UE initiates random access, step 430 is performed.

430: The eNB sends a random access response to the UE.

440: The eNB judges whether it has received the RRCConnection Request sent by the UE after sending the random access response. If the RRC Connection Request sent by the UE is received, the eNB considers that this access is a real random access, and returns to step 420. If the RRC Connection Request sent by the UE is not received, it is determined that the access is a false access, and step 450 is performed.

450: Accumulate the number of false accesses;

460: Judging whether a predetermined detection period (such as 1 minute) is exceeded. If the judgment result is that the predetermined detection period is exceeded, step 470 is performed.

470: Determine whether the accumulated number of false accesses is lower than a preset second threshold (for example, 10 times). If the preset second threshold is exceeded, the detection cycle is reset and the process returns to step 420 . If the judging result is lower than the preset second threshold, step 480 is executed.

480: Determine whether the initial access power is lower than a preset initial access power lower limit (eg -25dmb). If the judgment result is that the preset initial access power lower limit has been reached, the method ends without processing. If the judging result is that the preset initial access power lower limit has not been reached, then the process proceeds to 490 .

490: Decrease the initial access power by one step (for example, 2db), and reduce the random access detection threshold by one step at the same time. As mentioned above, the step size for reducing the random access detection threshold may be determined according to the step size for reducing the initial access power.

The eNB may broadcast the new reduced initial access power to the UEs in the cell through the SIB message.

According to the embodiment of the present invention, by judging whether the RRC Connection Request sent by the UE is received after sending the random access response, it is determined whether it is a real random access of the UE, which ensures the reliability of the judgment result; Accumulating the number of false accesses in the detection period can maintain the stability of the system and avoid frequent changes in the initial access power; broadcast the new reduced initial access power to UEs in the cell through the SIB message, which can be easily unified Reduce all UEs in the cell to use the new reduced initial access power; before reducing the initial access power of the UE, it can provide a protection by judging whether the initial access power has been adjusted to the preset initial access power lower limit Mechanism to prevent system failure caused by too low initial access power or UE cannot achieve effective random access; reduce the initial access power by a preset step size, allowing precise control of the system; random access detection threshold The reduced step size is determined according to the reduced step size of the initial access power, which can improve the stability of random access detection threshold adjustment.

The embodiments of the present invention shown in Fig. 3 and Fig. 4 can be integrated together to constitute another embodiment of the present invention, according to the comparison between the accumulated number of false accesses and the first threshold and the second threshold, correspondingly increase or decrease UE initial access power. On this basis, the random access detection threshold can be increased or decreased.

According to an embodiment of the present invention, the first threshold may be greater than or equal to the second threshold.

The embodiment of the present invention also proposes a base station for implementing the random access method of the embodiment of the present invention, as shown in FIG. 5 . FIG. 5 is a schematic structural diagram of a base station 500 in an LTE system.

The base station equipment 500 includes: a first judging unit 510, configured to judge whether the user equipment initiates random access according to the random access detection threshold; a sending unit 520, configured to determine that the user equipment initiated During random access, send a random access response to the user equipment; the second judging unit 530 is configured to judge whether the radio resource control sent by the user equipment is received after the sending unit 520 sends the random access response. A connection request; an accumulating unit 540, configured to determine that the user equipment is a false access when the second judging unit 530 judges that the radio resource control connection request sent by the user equipment is not received, and accumulates the number of false accesses a control unit 550, configured to notify the user equipment in the cell to increase the initial access power when the number of false access accumulated by the accumulating unit 540 exceeds a preset first threshold, and/or increase the random access power; into the detection threshold.

The features described in the method part according to the embodiment of the present invention may be applicable to the base station of the embodiment of the present invention.

According to the embodiment of the present invention, the accumulating unit 540 accumulates the number of false accesses within a predetermined detection period (eg, 1 minute). When the number of false accesses accumulated by the accumulation unit 540 exceeds a preset first threshold (for example, 100 times), the control unit 550 notifies the user equipments in the cell to increase the initial access power.

Specifically, according to the embodiment of the present invention, the control unit 550 is configured to broadcast the increased initial access power to user equipments in the cell through a SIB message. Optionally, the control unit 550 may also send a notification message to the user equipment in the cell, and notify the user equipment in the cell to increase the initial access power through the notification message.

According to the embodiment of the present invention, when increasing the initial access power, the control unit 550 may increase the initial access power by one step (for example, 2db), and simultaneously increase the random access detection threshold by one step.

According to a further embodiment of the present invention, in the case of synchronously increasing the random access detection threshold and notifying the user equipment in the cell to increase the initial access power, the magnitude of increasing the initial access power of the user equipment in the notified cell is based on The increase range of the random access detection threshold is set by the control unit.

According to the embodiment of the present invention, optionally, the control unit 550 is further configured to determine whether the initial access power of the user equipment has been adjusted to the preset initial access power before informing the user equipment in the cell to increase the initial access power. input power upper limit, if the result of the determination is no, the control unit 550 notifies the user equipment in the cell to increase the initial access power.

According to a further embodiment of the present invention, the control unit 550 is further configured to notify the user equipment in the cell to reduce the initial access power when the number of false accesses is lower than a preset second threshold (for example, 10 times), and /or, reduce the random access detection threshold.

According to the embodiment of the present invention, the control unit 550 is configured to broadcast the reduced initial access power to user equipments in the cell through a SIB message. Optionally, the control unit 550 may also send a notification message to the user equipment in the cell, and notify the user equipment in the cell to reduce the initial access power through the notification message.

According to the embodiment of the present invention, when reducing the initial access power, the control unit 550 may reduce the initial access power by one step (for example, 2db), and at the same time reduce the random access detection threshold by one step.

According to a further embodiment of the present invention, in the case of synchronously reducing the random access detection threshold and notifying the user equipment in the cell to reduce the initial access power, the magnitude of reducing the initial access power for the user equipment in the notified cell is based on The reduction range of the random access detection threshold is set by the control unit 550 .

According to the embodiment of the present invention, optionally, the control unit 550 is further configured to determine whether the initial access power of the user equipment has been adjusted to the preset initial access power before notifying the user equipment in the cell to reduce the initial access power. The lower limit of the access power, if the result of the judgment is no, the control unit notifies the user equipment in the cell to reduce the initial access power.

Those of ordinary skill in the art can understand that the methods and systems disclosed herein are only exemplary, and the processes included in the methods are not limited to the order described herein, but can be adjusted according to specific needs and the convenience of technical implementation. In addition to the above exemplified content, the method and system may further include other processes and modules according to requirements of specific application occasions.

Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

Although some embodiments of the present invention have been shown and described, those skilled in the art will understand that various modifications can be made to these embodiments without departing from the principles and spirit of the invention, and such modifications shall fall within into the scope of the present invention.

Claims (14)

1. an accidental access method is characterized in that, described method comprises:

According to inserting detection threshold at random, judge whether subscriber equipment initiates to insert at random;

If judged result is for thinking that subscriber equipment initiated at random to insert, then to described subscriber equipment transmission accidental access response;

Whether judgement receives the wireless resource control connection request that described subscriber equipment sends after sending described accidental access response;

If do not receive the wireless resource control connection request that described subscriber equipment sends, determine that then described subscriber equipment is false the access, and the false quantity that inserts that adds up;

When the access of the falseness after described the adding up quantity surpassed the first default thresholding, the subscriber equipment in the notifying cell improved initial access power, and/or, improve the described detection threshold that inserts at random.

2. accidental access method as claimed in claim 1 is characterized in that, the subscriber equipment in the described notifying cell improves initial access power and comprises:

By the initial access power after the subscriber equipment broadcasting raising of system message in described sub-district.

3. accidental access method as claimed in claim 2, it is characterized in that, improve under the situation of initial access power at the described subscriber equipment that inserts at random in detection threshold and the notifying cell of raising synchronously, the subscriber equipment in the described notifying cell improves the amplitude of initial access power and sets according to the described increase rate that inserts detection threshold at random.

4. as each described method of claim 1 to 3, it is characterized in that described method also comprises:

Subscriber equipment in notifying cell improves before the initial access power, judges whether the initial access power of described subscriber equipment has been adjusted to the default initial access power upper limit;

If the result of described judgement is not, then the subscriber equipment in the notifying cell improves initial access power.

5. accidental access method as claimed in claim 1 is characterized in that, described method also comprises:

When the access of the falseness after described the adding up quantity was lower than preset second threshold, the subscriber equipment in the notifying cell reduced initial access power, and/or, reduce the described detection threshold that inserts at random.

6. method as claimed in claim 5 is characterized in that, the subscriber equipment in the described notifying cell reduces initial access power, comprising:

By the initial access power after the subscriber equipment broadcasting reduction of system message in described sub-district.

7. method as claimed in claim 6 is characterized in that,

Reduce under the situation of initial access power at the described subscriber equipment that inserts at random in detection threshold and the notifying cell of reduction synchronously, the subscriber equipment in the described notifying cell reduces the amplitude of initial access power and sets according to the described reduction amplitude that inserts detection threshold at random.

8. as each described method of claim 5 to 7, it is characterized in that described method also comprises:

Subscriber equipment in notifying cell reduces before the initial access power, judges whether the initial access power of described subscriber equipment has been adjusted to default initial access power lower limit;

If the result of described judgement is not, then the subscriber equipment in the notifying cell reduces initial access power.

9. a base station is characterized in that, described base station comprises:

First judging unit is used for judging according to inserting detection threshold at random whether subscriber equipment initiates to insert at random;

Transmitting element is used in the judged result of described first judging unit sending accidental access response to described subscriber equipment when thinking that subscriber equipment has initiated to insert at random;

Second judging unit is used for judging after described transmitting element sends described accidental access response, whether receives the wireless resource control connection request that described subscriber equipment sends;

The unit that adds up is used for during for the wireless resource control connection request that do not receive described subscriber equipment and send, determining that described subscriber equipment inserts for false in the result of described second judgment unit judges, and the false quantity that inserts that adds up;

Control unit, when being used for falseness after the described unit that adds up adds up and inserting quantity and surpass the first default thresholding, the subscriber equipment in the notifying cell improves initial access power, and/or, improve the described detection threshold that inserts at random.

10. base station as claimed in claim 9 is characterized in that, described control unit specifically is used for by the initial access power after the subscriber equipment broadcasting raising of system message in described sub-district.

11. as claim 9 or 10 described base stations, it is characterized in that, the subscriber equipment that described control unit also is used in notifying cell improves before the initial access power, whether the initial access power of judging described subscriber equipment has been adjusted to the default initial access power upper limit, if the result of described judgement is for denying the subscriber equipment raising initial access power in the then described control unit notifying cell.

12. base station as claimed in claim 9, it is characterized in that described control unit also is used for when described false access quantity is lower than preset second threshold, the subscriber equipment in the notifying cell reduces initial access power, and/or, reduce the described detection threshold that inserts at random.

13. base station as claimed in claim 12 is characterized in that, described control unit specifically is used for by the initial access power after the subscriber equipment broadcasting reduction of system message in described sub-district.

14. as claim 12 or 13 described base stations, it is characterized in that, the subscriber equipment that described control unit also is used in notifying cell reduces before the initial access power, whether the initial access power of judging described subscriber equipment has been adjusted to default initial access power lower limit, if the result of described judgement is for denying the subscriber equipment reduction initial access power in the then described control unit notifying cell.

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