WO2012062222A1

WO2012062222A1 - Configuration method for delayed access, method for delayed access, and related device

Info

Publication number: WO2012062222A1
Application number: PCT/CN2011/082160
Authority: WO
Inventors: 舒兵; 王济勇; 房明
Original assignee: 华为技术有限公司
Priority date: 2010-11-12
Filing date: 2011-11-14
Publication date: 2012-05-18
Also published as: CN102469616B; CN102469616A

Abstract

Embodiments of the present invention provide a configuration method for delayed access, a method for delayed access, and a related device so as to strictly determine a delay time and improve the access success rate of a terminal. The method comprises: a network side device obtaining, according to the number of terminals concurrently initiating access to a GSM network, the number of common control channels (CCCHs) and a correction parameter, a time delay value required by a terminal to access the GSM network; and the network side device transmitting to the terminal a time value not less than the time delay value, enabling the terminal to transmit a channel request (CR) having a time delay not greater than the time value. Compared with the prior art, the present invention enables the terminal to transmit the CR within a reasonable delay time range, which not only prevents the terminal from transmitting the CR blindly, but also avoids unnecessary waiting by the terminal (namely exceeding the reasonable delay time). In addition, the probability of occurrence of access collision is reduced, improving the access success rate.

Description

A delay access configuration method, a delay access method, and a related device are required to be submitted to the Chinese Patent Office on January 12, 201, and the application number is

201 01 0542428. 0, the title of the invention is the priority of the Chinese Patent Application, the disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of access networks, and in particular, to a method for configuring delayed access, a method for delay access, and related devices. Background technique

Machine-to-machine (M2M) communication connects various end devices or subsystems through various communication technologies and aggregates them into a management system to manage and service the devices. Under this M2M, a huge number of devices (ie terminals) are connected to the network. Typically, at a certain time, a large number of terminals may initiate access to the network side at the same time. For example, when the train passes through the bridge, the sensing devices installed on the bridge sense the passage of the train. These sensing devices are almost simultaneously Send sensor data; for example, when floods cross the police line, there will be a large number of watermark sensors that simultaneously send data.

The GSM network, which has been used on a large scale, has become one of the choices for terminal interconnection under M2M. In the GSM system, if the mobile station (MS, Mobile Station) needs to establish communication with the network, it needs to send a random access channel (RACH, Random Access CHannel) of the Common Control CHannel to the network side. Channel Request (CR , Channel Request ) to request a signaling channel from the system. After receiving the CR of the terminal, the network side sends an immediate assignment message or an assignment rejection message to the terminal on the downlink grant channel (AGCH, Access Grant Channel) of the CCCH. If the terminal receives the immediate assignment message, the terminal establishes a connection with the network side and performs signaling or data transmission; if the terminal receives the assignment rejection message, the terminal exits the access procedure. After the terminal sends a CR, if the network side does not receive a response (ACK) to the CR, the terminal will resend the CR on the RACH until the number of transmissions reaches M+1 (M is the maximum number of retransmissions). When a large number of terminals access the network at the same time, it is inevitable that two or more terminals simultaneously grab a RACH slot to send a channel request. This is called an access collision. There are two consequences of the access collision. One is that the level of a burst received by the network on this time slot is significantly higher than the other, so that the network will process the random CR with a higher level; Another consequence is that any CR network cannot be received correctly due to mutual interference between the two. Therefore, as the volume of traffic increases, the probability of packets being lost due to collisions is increasing, which is bound to be an important constraint on network capacity.

A large number of terminals send access requests at the same time, causing RACH congestion, which leads to the problem that the terminal cannot access the network. The industry proposes a solution: The terminal sends the CR after a delay after a certain period of time before the CR is sent for the first time. The time period of the random delay may be a specific number of time slots. For example, the terminal randomly selects one time slot from the time slot set {1, 5, 9, ..., N}, assuming that the time slot is 100. Then, before the terminal sends the CR to the network side for the first time, it waits for 100 slots before sending. After the CR is sent for the first time, the subsequent retransmission process is the same as the previous mechanism, with no changes.

In the above existing solution, the terminal is a time slot randomly selected from the time slot set as the delay time. Since the maximum value in the time slot set is not strictly determined, the CR is delayed according to the time slot selected from the time slot. The access success rate (ASR) is not guaranteed. For example, the selected time slot is too small (that is, the delay time is too short). Even if the delay is sent, the probability of an access collision is still large. Still can not reach the specified ASR.

Summary of the invention

The embodiment of the invention provides a configuration method for delay access, a delay access method and related devices, so as to strictly determine a delay time and improve the access success rate of the terminal.

The embodiment of the present invention provides a configuration method for delay access, including: the network side device obtains the terminal accessing the GSM network according to the number of terminals simultaneously initiating access to the GSM network, the number of common control channels CCCH, and the modified parameters. The required delay value;

And the network side device sends a time value not less than the delay value to the terminal, so that the terminal sends the channel request CR with a delay that is not greater than the time value.

An embodiment of the present invention provides a method for delay access, including: receiving a network side device by a terminal The time value sent;

The terminal sends a channel request CR according to the time value and randomly delays for a period of time;

The time value is not less than a delay value required by the network side device to access the GSM network according to the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of the common control channel CCCH. The period of the delay is not greater than the specified time value.

The embodiment of the present invention provides a network side device, including: a delay value obtaining module, configured to obtain, according to the number of terminals that simultaneously initiate access to the GSM network, the number of common control channel CCCHs, and the modified parameters, obtain the terminal accessing the GSM network. The required delay value;

And a sending module, configured to send a time value not less than the delay value to the terminal, so that the terminal sends the channel request CR with a delay that is not greater than the time value.

An embodiment of the present invention provides a terminal, including: a receiving module, configured to receive a time value sent by a network side device;

a channel request sending module, configured to send a channel request CR for a period of time according to the time value;

The time value is not less than a delay value required by the network side device to access the GSM network according to the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of the common control channel CCCH. The period of the delay is not greater than the time value.

The embodiment of the present invention provides a delay access system, including: a network side device and a terminal: the network side device, configured to use the number of terminals that simultaneously initiate access to the GSM network, the number of common control channels CCCH, and the modified parameters. Obtaining a delay value required for the terminal to access the GSM network, and sending a time value not less than the delay value to the terminal, so that the terminal sends a channel request with a delay that is not greater than the time value. CR;

The terminal is configured to receive a time value sent by the network side device, and send a channel request CR according to the time value;

As can be seen from the foregoing embodiments of the present invention, the number of terminals that access the GSM network and the number of common control channels CCCH configured for the cell are modified parameters. Based on these factors, the delay value required for the terminal to access the GSM network is strictly obtained, so that the delay time for the terminal to transmit the channel request CR also has a certain upper limit. Therefore, compared with the prior art, the present invention can enable the terminal to send the channel request CR within a reasonable delay time range, thereby avoiding the terminal blindly transmitting the channel request CR and avoiding the terminal waiting for unnecessary (that is, exceeding the reasonable The delay time), at the same time, can also reduce the probability of 'j, access collision, and improve the access success rate.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments will be briefly described below. Obviously, the drawings in the following description are merely the present invention. For some embodiments, other drawings may be obtained as those of ordinary skill in the art without any inventive labor.

1 is a schematic flowchart of a method for configuring delayed access according to an embodiment of the present invention;

2 is a schematic diagram of a channel combination structure including a CCCH channel according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a channel combination structure including a C CC H channel according to another embodiment of the present invention;

4 is a schematic flowchart of a method for delay access according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a logical structure of a network side device according to an embodiment of the present invention;

6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a logical structure of a delay access system according to an embodiment of the present invention; FIG. 8 is a cumulative distribution function of a terminal in a GSM network cell according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The following are connected to terminals in the GSM network, for example, mobile stations (MS, Mobile Station) The GSM network is taken as an example to describe the configuration method of delay access provided by the present invention.

Referring to FIG. 1, FIG. 1 is a schematic flow chart of a method for configuring delayed access according to an embodiment of the present invention. Mainly includes the steps:

S101. The network side device obtains a delay value required by the terminal to access the GSM network according to the number of terminals that initiate the access to the GSM network, the number of public control channel CCCHs, and the modified parameters.

The network side device may be a base station subsystem (BSS, Base Station Subsystem), including a base station (BTS, Base Transceiver Station) or a base station controller (BSC, Base Station Controller), etc., the terminal may be a mobile station MS, and the modified parameters are connected to the terminal. The access success rate of the GSM network is related. For example, if the access success rate of the terminal to access the GSM network is greater, the correction parameter should also be larger.

It should be noted that, in the embodiment of the present invention, not only the discrete access success rate may correspond to the modified parameter, but also the access success rate and the correction parameter in a continuous value range. For example, when the access success rates are Easr and Fasr (here, Fasr is greater than Easr), the correction parameters can be Pml and Pm2 respectively (here, Pm2 is greater than Pml); the access success rate is [Aasr ·> Basr] And [Casr, Dasr] (here, Basr is greater than Aasr, Casr is greater than Basr, Dasr is greater than Casr), the correction parameters can be Pm3 and Pm4 (here, Pm4 is greater than Pm3). Typically, when the access success rate of the terminal access GSM network is required to be greater than or equal to 97%, the correction parameter can be taken as 6.25.

In the embodiment of the present invention, the number of all terminals in the GSM network cell may be roughly estimated as the number of terminals simultaneously initiating access to the GSM network; if more precise, the number of users in a certain level in the cell may also be calculated. The number of users is used as the number of terminals that initiate the access to the GSM network at the same time, for example, the number of all meter reading terminals in the cell in the M2M application, or the network side estimates the short time (for example, 1 second or 1 minute, etc.) The number of users that may initiate access, and the number of users is used as the number of terminals simultaneously initiating access to the GSM network.

In the embodiment of the present invention, the delay value may be expressed by using the number of slots, that is, calculating the delay calculated by the network side device according to the modified parameter, the number of terminals simultaneously initiating access to the GSM network, and the number of common control channels CCCH. The unit of value is the time slot. The delay value means that the terminal needs to delay the time indicated by the delay value to send the CR, and the access success rate of accessing the GSM network can reach the specified requirement. S102. The network side device sends a time value not less than the delay value to the terminal. The time value transmitted by the network side device not less than the delay value obtained in step S101 can also be represented by the number of time slots. Assuming that the delay value calculated by the network side device according to the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of the common control channel CCCH is 100 time slots, the time value sent by the network side device to the terminal is For 100 time slots, the time value transmitted by the network side device to the terminal may also be larger than 100 time slots, for example, 110 time slots.

After receiving the time value sent by the network side device, the terminal may randomly select the access success rate of accessing the GSM network when the delay is one time to reach the specified requirement.

As can be seen from the above embodiments of the present invention, since the network side device is based on the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of common control channels CCCH configured for the cell, the terminal is strictly obtained after considering these factors. The delay value required to enter the GSM network, and thus the delay time for the terminal to transmit the channel request CR also has a determined upper limit. Therefore, compared with the prior art, the present invention can enable the terminal to send the channel request CR within a reasonable delay time range, thereby avoiding the terminal blindly transmitting the channel request CR and avoiding the terminal waiting for unnecessary (that is, exceeding the reasonable The delay time), at the same time, can also reduce the probability of 'j, access collision, and improve the access success rate.

The access procedure is related to the uplink random access channel (RACH, Random Access CHannel) and the downlink grant channel (AGCH) of the CCCH channel, that is, the access of the terminal is closely related to the resources of the RACH and the AGCH. The more resources there are, the smaller the collision of the access process may be. The network side device will be more likely to assign the terminal, so the success rate of the entire access process of the terminal will be higher. Otherwise, the access success rate will be The lower, therefore, the following can be combined with the CCCH channel structure to illustrate the configuration method of the delay access of the present invention.

In the GSM system, the uplink of the CCCH channel is composed of RACH, and the downlink is composed of PCH and AGCH. The uplink channel and the downlink channel are composed of 51 TDMA frames to form a multiframe. As shown in FIG. 2, it is a schematic diagram of a channel combination structure including a CCCH channel according to an embodiment of the present invention. The numbers 0 to 50 in the figure indicate 0th to 50th Time Division Multiple Access (TDMA) frames. . Such a channel is composed of a frequency correction channel (FCCH, Frequency Correct CHannel), a synchronization channel (SCH, Synchronization CHannel), and a broadcast control channel (BCCH, Broadcast). Control CHannel) is combined with a common control channel (CCCH, Common Control CHannel), and uses "FCCH + SCH + BCCH + CCCH" to indicate that the broadcast control channel BCCH and the common control channel CCCH are combined into a channel (using "FCCH +BCCH" The representation is the same as the combined channel "FCCH + SCH + BCCH + CCCH", wherein the 51 uplink frame consists of 51 RACH access frames ("R" is used in the figure) and the downlink channel includes 9 downlinks. CCCH block ("C" flag is used in the drawing), each downlink CCCH block is composed of 4 TDMA frames.

FIG. 3 is a schematic diagram of a channel combination structure including a CCCH channel according to another embodiment of the present invention, where numbers 0 to 50 represent 0 to 50 TDMA frames. Such a channel is composed of a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH, a common control channel CCCH, four independent dedicated control channels (SDCCH, Stand-alone Dedicated Control CHannel), and four slow associated control channels (SACCH). , Slow Associated Control CHannel ), wherein the uplink channel formed by 51 multiframes includes 27 RACH access frames (the "R" flag is used in the drawing), and the downlink channel includes 3 downlink CCCH blocks (in the drawing) In the "C" flag, each downlink CCCH block consists of 4 TDMA frames.

Regardless of the channel combination illustrated in FIG. 2 or FIG. 3, the downlink CCCH block of the CCCH channel can be used as a paging channel (PCH, Paging Channel) or an immediate assignment channel (AGCH, Access Grant Channel), and the specific configuration is passed through the system. The broadcast parameter BS_AG_BLKS_RES indicates that when BS_AG_BLKS_RES=0, it indicates that the system automatically allocates. The network device initiated the number of terminals simultaneously access the GSM network, the number of common control channel CCCH and the correction parameter to obtain the desired delay value to access the GSM network terminal _M; ¹ _{_Μ,} where

Ν _ CCCHs x N _ Agchs x N

N_Devices number of terminals simultaneously initiated access the GSM network, P _m as a correction parameter, N_CCCHs the number of common control channel CCCH, N_ Agchs downlink CCCH block number block assignment for assignment of the user, N being each assigned The number of users assigned by the block. The modified parameter Pm is related to the access success rate of the terminal accessing the GSM network. The greater the access success rate of the terminal to access the GSM network, the larger the correction parameter should be.

According to the channel combination exemplified in FIG. 2, if all downlink CCCH blocks of the CCCH channel are used to assign a single user, that is, all downlink CCCH blocks of the CCCH channel are used as AGCH and only used to assign one user, the parameter N_Agchs is actually 9 (CCCH channel under such channel combination) With 9 downlink CCCH blocks), the network device calculates the delay value required for the terminal to access the GSM network. N Devices χ Ρ „

N _CCCHs

According to the channel combination exemplified in Fig. 3, if all downlink CCCH blocks of the CCCH channel are used to assign a single user, that is, all downlink CCCH blocks of the CCCH channel are used as AGCH and only used to assign one user, the parameter N_Agchs is actually 3 (the CCCH channel has 3 downlink CCCH blocks under such channel combination), the network device calculates the delay value required for the terminal to access the GSM network as N _ Devices x P _m x 9 N _ Devices x P _m x 3

N _CCCHs x 3 ^ N _CCCHs ^ .

According to the channel combination exemplified in FIG. 2 or FIG. 3, if each of the assignment blocks contains less than 4 TDM A frames, that is, each assignment block is used to assign multiple users, without loss of generality, the network device calculates The delay required for the terminal to access the GSM network is M.

Ν _ ^ CC-^CHs x N _ AYgchs x N , here,

N_Devices, Pm, and N_CCCHs have the same meaning as when all downlink CCCH blocks of the CCCH channel are used to assign users, and N is the number of users assigned to each assigned block.

Referring to FIG. 8, the cumulative distribution function (CDF, Cumulative distribution function) in the GSM network cell according to the embodiment of the present invention, in the cumulative distribution function, the horizontal axis is the carrier to interference ratio of the terminal (CIR, Carrier to Interference Ratio) ), the vertical axis is the proportion of terminals with corresponding CIR in the cell. In the following, in conjunction with the CDF of FIG. 8, the maximum number of retransmissions of the CR by the network side device is set to 4, and the access success rate (ASR) of the terminal accessing the GSM network is not less than 97%. The configuration method of delay access of the present invention. Under this setting requirement, the correction parameter Pm can be 6.25.

Under the ideal situation without considering road loss and assignment failure, through simulation practice, think that each

The mathematical expectation of the number of users transmitting CR for the first time on the RACH slot λ can be a maximum of 0.2. In non-ideal situations, that is, considering the path loss and assignment failure, the λ value will be less than 0.2. A large number of simulation practices show that when the value is ≤ 0.16, the terminal's ASR can meet the specified requirements. If a cell is configured with only one CCCH channel and the channel combination is as shown in Figure 2, the number of slots corresponding to the delay interval is equal to the number of RACH slots in the period (ie, 06 81 (^ = N_RachSlots). According to the above relationship, N_DelaySlots is used to indicate the delay value required for the terminal to access the GSM network, and N_DelaySlots should satisfy the following inequalities:

^N" "Devices

N DelaySlots =― ≥ N Devices x P = N Devices x 6.25 , ie

" 0.16 " m _ N _ DelaySlots >N_ Devices x 6.25

(1)

In inequality (1), N_Devices is the number of terminals on a common control channel CCCH in the GSM network cell, and the unit of N_DelaySlots is represented by a time slot. The network side device calculates a time value (in units of time slots) according to the inequality expression of the inequality (1). For example, the time for transmitting CR in 100 time can be arbitrarily selected between 0 and 100 time slots.

The network side device may also send a time value (in units of time slots) larger than the right expression of the inequality (1) inequality to the terminal. For example, if the inequality (1) inequality expression is 100, the time of sending the CR may be Choose between 0 and 110 time slots.

If the GSM network cell is configured with multiple common control channels CCCH, the inequality (1) is corrected to:

N Devices X 6.25

N _ DelaySlots≥■

N CCCH

(2) Inequality (2) has the same meaning as the same parameter in inequality (1), where N_CCCH _S is the number of common control channels CCCH configured for the GSM network cell. Obviously, inequality (1) can be regarded as 1^_ of inequality (2). 0:1^ takes 1, that is, a special case when the common control channel CCCH of the GSM network cell configuration is 1.

The network side device calculates a time value (in units of time slots) according to the expression in the inequality of inequality (2), for example, 80 time slots. Then, when the network side device sends the time values of the 80 time slots to the terminal, The time when the terminal delays transmitting CR can be arbitrarily selected between 0 and 80 time slots.

The network side device may also send a time value (in units of time slots) larger than the expression on the right side of the inequality (1) of the inequality (1), for example, assuming that the inequality (2) of the inequality expression is 80, the time of sending the CR may be delayed. Choose between 0 and 90 time slots.

Inequalities (1) and inequalities (2) are obtained on the premise that all downlink CCCH blocks of the CCCH channel are used to assign users, that is, all downlink CCCH blocks of the CCCH channel are used as AGCH. As mentioned before, the downlink CCCH block of the CCCH channel can be used both as a PCH and as an AGCH. If a part of the downlink CCCH block in the downlink CCCH block of the common control channel CCCH is used to assign a user, that is, a part of the downlink CCCH block of the common control channel CCCH is used as the AGCH, and another part of the downlink CCCH block is used as the PCH, the inequality (2) is further corrected. for:

N Devices X 6.25x9

N _ DelaySlots >

N _CCCH _s x N _ Agcl3⁄4

(3) Inequality (3), 06¥68 and 1^_(^:(^3⁄4 is the same as when all downlink CCCH blocks of the CCCH channel are used to assign users, and 1^_ (^ ₈ is part of the downlink CCCH) In the embodiment of the present invention, the N_Agchs are related to the parameter BS_AG_BLKS_BES configured on the network side, as follows:

When BS_AG_BLKS_RES ≠ 0, BS_AG_BLKS_RES indicates the number of AGCH blocks allocated by the system. At this time, N_Agchs = BS_AG_BLKS_RES; when BS_AG_BLKS_RES = 0, it means that the system automatically allocates, and N_Agchs = 9 can be assumed at this time (as shown in Figure 2, the channel combination) Or N_Agchs = 3 (as in the channel combination illustrated in Figure 3).

According to the above inequalities (1), (2), (3), when the number of GSM network cell terminals is 100 to 1000, the value of the N_DelaySlots configured by the network side device can refer to Table 1 (the channel combination illustrated by FIG. 2) Obtained) and Table 2 (the channel combinations illustrated in Figure 3 are obtained;).

X CCCI Leakage Θ3⁄4 mm Country: awake painting ® w 88Θ: Country mm

625 1250 1875 2500 3125 3750 4375 5000 5625 6250

I5S \:

313 625 938 1250 1563 1875 2188 2500 2813 3125

209 417 625 834 1042 1250 1459 1667 1875 2084

157 313 469 625 782 938 1094 1250 1407 1563

5625 11250 16875 22500 28125 33750 39375 45000 50625 56250

2813 5625 8438 11250 14063 16875 19688 22500 25313 28125

1875 3750 5625 7500 9375 11250 13125 15000 16875 18750

: Bay:

1407 2813 4219 5625 7032 8438 9844 11250 12657 14063

2813 5625 8438 11250 14063 16875 19688 22500 25313 28125 m 1407 2813 4219 5625 7032 8438 9844 11250 12657 14063

C. J :

938 1875 2813 3750 4688 5625 6563 7500 8438 9375

704 1407 2110 2813 3516 4219 4922 5625 6329 7032 Discussion; 1875 3750 5625 7500 9375 11250 13125 15000 16875 18750 13⁄41 :

938 1875 2813 3750 4688 5625 6563 7500 8438 9375

Table 2

In the foregoing embodiment, inequalities (1), (2), and (3) are obtained based on each assignment block for assigning a user. In another embodiment provided by the present invention, if each assignment block contains less than 4 TDMA frames, i.e., each assignment block is used to assign multiple users, inequality (3) is corrected to:

N Devices X 6.25x9

N_DelaySlots≥

N _ CCCH _S x N — Agchg x N (4) Here, N is the number of users assigned to each assignment block.

Similarly, the network side device calculates a time value (in units of time slots) according to the expression in the inequality of inequality (4), for example, 120 time slots, then the network side device sends the time values of the 120 time slots to In the terminal, the time when the terminal delays transmitting CR can be arbitrarily selected between 0 and 120 time slots. The network side device may also send a time value (in the time slot) larger than the expression on the right side of the inequality (4) inequality to the terminal. For example, if the inequality (4) is not equal to the right side of the table end, the terminal delays sending the CR time. It can be arbitrarily selected between 0 and 140 time slots.

The foregoing embodiment describes the action of the network side device in the configuration method of the delayed access. The following embodiment illustrates the method of delay access by using a terminal, for example, a mobile station (MS, Mobile Station).

Referring to FIG. 4, a schematic flowchart of a method for delay access according to an embodiment of the present invention includes the following steps:

S401. The terminal receives a time value sent by the network side device.

In the embodiment of the present invention, when the terminal starts to access the GSM network, the channel request CR is not immediately sent, but the time value sent by the network side device is received.

S402. The terminal sends a channel request CR for a period of time according to a time value sent by the network side device.

The time value sent by the network side device is not less than the delay value required by the network side device to calculate the terminal accessing the GSM network according to the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of the common control channel CCCH. The delay is not longer than the specified time value.

Without loss of generality, in this embodiment, the network side device calculates the delay value required for the terminal to access the GSM network according to the modified parameter, the number of terminals that simultaneously initiate access to the GSM network, and the number of common control channel CCCHs. ^ N _ Devices x P _m x 9 where _{N Dev} i _ces is the

N _ CCCHs x N _ Agchs x N ~

At the same time, the number of terminals that access the GSM network is initiated, _m is the modified parameter, N_CCCHs is the number of the common control channel CCCH, and N_Agchs is the number of assigned blocks in the partial downlink CCCH block for assigning users, where N is The number of users assigned by each of the assigned blocks.

Specifically, if all downlink CCCH blocks of the common control channel CCCH are used to assign a single The user, in the combination mode of channel FCCH + SCH + BCCH + CCCH or BCCH + CCCH, the delay value is ^N - ^DevieesxPm , on the channel FCCH + SCH + BCCH + CCCH +

N-CCCHs N_ Devices xP x3

In SDCCH/4 + SACCH/4, the delay value is ^ _NC CCHs ^.

N _ Devices x P _m N _ Devices x P x9

A is i, the time value _N CCCHs is N_CCCH _S xN_Ag _C h _S xN where ^N is ¹ and N_Agchs is 9 (for example, 9 downlink CCCH blocks in the channel combination illustrated in FIG. 2 are all used to refer to

, N Devices x P x3

a special case of sending a corpse, and the delay value - _{N CCCHs} ^m is

N _ Devices x P x9

N_CCCHsxN_AgchsxN is a special case where ^N is ¹ and N_Agchs is 3 (for example, all of the 3 downlink CCCH blocks in the channel combination illustrated in FIG. 3 are used to assign one user).

If each assignment block is used to assign multiple users, there is no loss of generality, whether it is the channel combination of the example of FIG. 2 or FIG. 3, the delay value is _M ; _Μ .

N_ CCCHs x N _ Agchs x N

In this embodiment, the delay value, the network side device transmission time value, and the terminal random delay time period are all represented by time slots. For example, suppose that the maximum number of times that the network side device sets the terminal to retransmit CR is 4, the access success rate of the terminal accessing the GSM network is not less than 97%, and the correction parameter Pm is 6.25. If the delay value required by the network side device to access the GSM network according to the modified parameter Pm, the number of terminals N_Devices that simultaneously initiate access to the GSM network, and the number of common control channel CCCHs N_CCCHs are 625 time slots, then When the network side device sends the time value of the 625 time slots to the terminal, the terminal delays sending the CR for a period of time in the time slot set {1, 2,

3, 625} randomly selected.

It can be seen from the above embodiment that since the terminal delays transmitting the CR for a certain period of time, for example, 625 time slots, the terminal does not wait for a wait when sending the CR delayed, for example, waiting for 1200 times. The CR is sent after the gap.

The network side device may also send a time value (in units of time slots) larger than the calculated delay value to the terminal. For example, if the calculated delay value is 625 time slots, the network side device may also be 690. When the time value of each time slot is transmitted to the terminal, the time delay for the terminal to transmit the CR may be arbitrarily selected in the time slot set {1, 2, 3, 625..., 690}.

Referring to FIG. 5, it is a schematic diagram of a logical structure of a network side device according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown. The network side device shown in Figure 5 includes a delay value acquisition module 501 and a transmission module 502, where:

The delay value obtaining module 501 is configured to use, according to the number of terminals that simultaneously initiate access to the GSM network, The number of common control channel CCCHs and the correction parameters obtain the delay values required by the terminal to access the GSM network.

Without loss of generality, in this embodiment, the network side device calculates the delay value required for the terminal to access the GSM network according to the modified parameter, the number of terminals that simultaneously initiate access to the GSM network, and the number of common control channel CCCHs. ^ N _ Devices x P _m x 9 _ , where _{N Dev} i _ces is the

N _CCCHs x N _ Agchs x N ~

At the same time, the number of terminals that access the GSM network is initiated, lv is the modified parameter, N_CCCHs is the number of the common control channel CCCH, and N_Agchs is the number of assigned blocks for assigning users in the part of the downlink CCCH block, where N is The number of users assigned by each of the assigned blocks.

Specifically, if all downlink CCCH blocks of the common control channel CCCH are used to assign a single user, in a combined mode of channel FCCH + SCH + BCCH + CCCH or BCCH + CCCH, the delay value is ^N - ^{Deviees x Pm} , in channel FCCH + SCH + BCCH + CCCH +

^N - ^CCCHs _{N Devices x} p _χ

In SDCCH/4 + SACCH/4, the delay value is ^N - ^{evices xp} _m x - .

N_CCCHs

That is, the delay value N _ Devices x P _m is N _ Devices x P _m x 9 where _N is

1 N _CCCHs N _ CCCHs x N _ Agchs x N N_Agchs is 9 (for example, 9 downlink CCCH blocks in the channel combination illustrated in Figure 2 are all used for assignment

A special case of a user, and the delay value ^N - ^{DeviceS x P} m ^{x 3} is ^ N _ Devices x P _m x 9 _

N_ CCCHs N _CCCHs x N _ Agchs x N

N is 1 and N_Agchs is 3 (for example, the 3 downlink CCCH blocks in the channel combination illustrated in Figure 3 are all used to assign a user).

If each assignment block is used to assign multiple users, there is no loss of generality, whether it is the channel combination of the example of FIG. 2 or FIG. 3, the delay value is _M N _ ^ CC-C^Hs ^v x ^ic N ' ^s _ ^x A ^m gc ^> lh ⁹ sx _M .

N

The sending module 502 is configured to send a time value of the time delay value to the terminal, and FIG. 6 is a schematic diagram of a logical structure of the terminal according to the embodiment of the present invention. Only the parts related to the embodiment of the present invention are shown. The terminal shown in FIG. 6 includes a receiving module 601 and a channel request sending module 602, where:

The receiving module 601 is configured to receive a time value sent by the network side device.

The channel request sending module 602 is configured to send a random delay according to the time value. Channel request CR;

„ , , . , , , , Specifically, the delay value can be , where Ν Devices

^_ is the number of terminals simultaneously initiating access to the GSM network, Pm is the modified parameter, N_CCCHs is the number of the common control channel CCCH, and N_Agchs is the assigned block for assigning users in the part of the downlink CCCH block The number, N is the number of users assigned to each of the assigned blocks.

Referring to FIG. 7, FIG. 7 is a schematic diagram of a logical structure of a delay access system according to an embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown. The system includes a network side device 701 as illustrated in Figure 5 and a terminal 702 illustrated in Figure 6, wherein:

The network side device 701 is configured to obtain, according to the number of terminals that initiate the access to the GSM network, the number of the common control channel CCCH, and the modified parameter, the delay value required by the terminal to access the GSM network, and send a not less than the delay. a time value of the time value to the terminal 702, so that the terminal sends a channel request CR with a delay not greater than the time value;

The terminal 702 is configured to receive a time value sent by the network side device 701, and send a channel request CR for a period of time according to the time value.

The time value is not less than the terminal access of the network side device calculated according to the modified parameter, the number of terminals simultaneously initiating access to the GSM network, and the number of common control channel CCCHs.

The delay value required by the GSM network, the period of the delay is not greater than the time value.

„ , , . , . , , , , , N Devices x P _m x 9 ^ ,

Specifically, the delay value may be _Ν _ _{χ Ν} Α Α χ _Ν , where ^N _ ^DeviceS is the number of terminals simultaneously initiating access to the GSM network, and Pm is the modified parameter.

N_CCCHs is the number of CCCHs of the common control channel, N_Agchs is the number of assigned blocks in the partial downlink CCCH block for assigning users, and N is the number of users assigned to each of the assigned blocks.

It should be noted that the information interaction, the execution process, and the like between the modules/units of the foregoing device are based on the same concept as the method embodiment of the present invention, and the technical effects thereof are the same as the embodiment of the method of the present invention. Reference is made to the description in the method embodiment of the present invention, and details are not described herein again. A person skilled in the art can understand that all or part of the steps of the foregoing embodiments can be completed by a program to instruct related hardware. The program can be stored in a computer readable storage medium. The storage medium can include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.

The configuration method, the delay access method, and the phase mode of the delay access provided by the embodiments of the present invention are described above. The description of the above embodiments is only used to help understand the method and core idea of the present invention. The present invention is not limited by the scope of the present invention, and the scope of the present invention is not limited by the scope of the present invention.

Claims

Rights request

A method for configuring a delay access, the method comprising: the network side device obtaining the terminal access station according to the number of terminals simultaneously initiating access to the GSM network, the number of common control channels CCCH, and the modified parameters. a delay value required by the GSM network; the network side device sends a time value not less than the delay value to the terminal, to

2. The method of claim 1, wherein the delay value N _ Devices x P x9

N _CCCHs x N _ Agchs x N , where N_Devi _CeS is the number of terminals simultaneously initiating access to the GSM network, P _m is the modified parameter, N_CCCHs is the number of CCCHs of the common control channel, and N_Agchs is The number of assigned blocks in the partial downlink CCCH block for assigning users, N being the number of users assigned to each of the assigned blocks.

3. The method according to claim 2, wherein if all downlink CCCH blocks of the common control channel CCCH are used to assign a single user, then the channel FCCH + SCH + BCCH +

In CCCH or BCCH + CCCH, the delay value is ^N - ^{Deviees x P} _m , on the channel FCCH +

N-CCCHs

In the case of SCH + BCCH + CCCH + SDCCH/4 + SACCH/4, the delay value is

N _ Devices x P _m χ 3 .

^ N _CCCHs ^,

The channel FCCH + SCH + BCCH + CCCH is a channel formed by combining a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH, and a common control channel CCCH, where the BCCH + CCCH is a broadcast control channel BCCH and a common control channel. CCCH combined into a channel, the FCCH + SCH + BCCH + CCCH + SDCCH / 4 + SACCH / 4 is a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH, a common control channel CCCH, four independent dedicated control channels SDCCH /4 and 4 slow associated control channels SACCH/4 combined into a channel.

The method according to any one of claims 1 to 3, wherein the number of terminals simultaneously initiating access to the GSM network is the number of all terminals in the GSM network cell, and the GSM network The number of users that may initiate access in the cell or the number of users at a certain level within the GSM network cell.

The method according to any one of claims 1 to 3, characterized in that, if the access success rate of the terminal accessing the GSM network is greater than or equal to 97%, the correction parameter is 6.25.

The method according to any one of claims 1 to 3, wherein the correction parameter is related to an access success rate of the terminal accessing the GSM network;

If the access success rate of the terminal accessing the GSM network is larger, the acquired correction parameter is larger.

A method for delay access, characterized in that the method comprises:

Receiving, by the terminal, a time value sent by the network side device;

8. The method according to claim 7, wherein the delay value is _N_Devices x P _m x 9 _ wherein _N Devices is the simultaneous initiation of access to GSM

N _CCCHs x N _ Agchs x N ~

The number of network terminals, P _m is the correction parameter, and N_CCCHs is the common control channel

The number of CCCHs, N_Agchs is the number of assigned blocks in the partial downlink CCCH block for assigning users, and N is the number of users assigned to each of the assigned blocks.

9. The method according to claim 8, wherein if all downlink CCCH blocks of the common control channel CCCH are used to assign a single user, the channel FCCH + SCH + BCCH +

N-CCCHs

In the case of SCH + BCCH + CCCH + SDCCH/4 + SACCH/4, the delay value is

N _ Devices x P _m χ 3 .

^ N _CCCHs ^,

The channel FCCH + SCH + BCCH + CCCH is a channel formed by combining a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH, and a common control channel CCCH, where the BCCH + CCCH is a broadcast control channel BCCH and a common control channel. The CCCH is combined into a channel, and the FCCH + SCH + BCCH + CCCH + SDCCH/4 + SACCH/4 is a frequency calibration The channel of the positive channel FCCH, the synchronization channel SCH, the broadcast control channel BCCH, the common control channel CCCH, the four independent dedicated control channels SDCCH/4 and the four slow associated control channels SACCH/4.

A network side device, where the network side device includes:

a delay value obtaining module, configured to obtain a delay value required for the terminal to access the GSM network according to the number of terminals that initiate the access to the GSM network, the number of the public control channel CCCH, and the modified parameter;

The network side device according to claim 10, wherein the delay value is _N_Devices x P _m x 9 _ , wherein _N Devices is the simultaneous initiation of access to the GSM network

N _CCCHs x N _ Agchs x N ~

The number of terminals, Pm is the modified parameter, N_CCCHs is the number of the common control channel CCCH, N_Agchs is the number of assigned blocks in the partial downlink CCCH block for assigning users, and N is the each assignment The number of users assigned by the block.

The network side device according to claim 2, wherein if all downlink CCCH blocks of the common control channel CCCH are used to assign a single user, the channel FCCH + SCH +

In BCCH + CCCH or BCCH + CCCH, the delay value is ^N _ ^{Devices x P} _m , in the channel

N _CCCHs

FCCH + SCH + BCCH + CCCH + SDCCH/4 + SACCH/4 , the delay value

N _ Devices x P _m x3

For N _ CCCHs ;

Wherein, the channel FCCH + SCH + BCCH + CCCH is a channel formed by combining a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH and a common control channel CCCH, the BCCH + CCCH being a broadcast control channel BCCH and a common control The channel CCCH is combined into a channel, and the FCCH + SCH + BCCH + CCCH + SDCCH/4 + SACCH/4 is a frequency correction channel FCCH, a synchronization channel SCH, a broadcast control channel BCCH, a common control channel CCCH,

4 independent dedicated control channels SDCCH/4 and 4 slow associated control channels SACCH/4 combined into a channel.

The network side device according to any one of claims 10 to 12, wherein the number of terminals simultaneously initiating access to the GSM network is the number of all terminals in the GSM network cell. Quantity, the number of users that may initiate access within the GSM network cell or the number of users at a certain level within the GSM network cell.

The network side device according to any one of claims 10 to 12, wherein if the access success rate of the terminal accessing the GSM network is greater than or equal to 97%, the correction parameter is 6.25. .

The network side device according to any one of claims 10 to 12, wherein the correction parameter is related to an access success rate of the terminal accessing the GSM network;

A terminal, wherein the terminal comprises:

a receiving module, configured to receive a time value sent by the network side device;

The terminal according to claim 16, wherein the delay value is ^N" Devices x P x 9

N _CCCHs x N _ ^chs x N , where N_De _V i _CeS is the number of terminals simultaneously initiating access to the GSM network, Pm is the modified parameter, and N_CCCHs is the number of CCCHs of the common control channel, N_Agchs For the number of assigned blocks in the partial downlink CCCH block for assigning users, N is the number of users assigned to each of the assigned blocks.

18. A delay access system, wherein the system comprises a network side device and a terminal:

The network side device is configured to: according to the number of terminals that initiate the access to the GSM network, the number of the common control channel CCCH, and the modified parameter, obtain a delay value required by the terminal to access the GSM network, and send a not less than the a time value of the delay value to the terminal, so that the terminal sends a channel request CR with a delay not greater than the time value;

The terminal is configured to receive a time value sent by the network side device, and according to the time value, randomly send a channel request CR for a period of time; The time value is not less than a delay value required by the network side device to access the GSM network according to the modified parameter, the number of terminals that initiate the access to the GSM network, and the number of the common control channel CCCH. The period of the delay is not greater than the time value.

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