WO2016095193A1

WO2016095193A1 - Method for triggering backoff, base station device, user device and system thereof

Info

Publication number: WO2016095193A1
Application number: PCT/CN2014/094332
Authority: WO
Inventors: 陈宝军
Original assignee: 华为技术有限公司
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2016-06-23
Also published as: CN106165520B; CN106165520A

Abstract

Disclosed in the embodiment of the present invention are a method for triggering backoff, and the method comprises: obtaining competition access load, wherein the competition access load is related to the number of random access preamble messages received in a physical random access channel; obtaining flow-control condition information, wherein the flow-control condition information is related to the number of MSG3s of the flow-control; adjusting the value of a backoff index according to the competition access load and the flow-control condition information; and transmitting to a user device a random access response message carrying the backoff index in order to make the user trigger backoff according to the backoff index. Accordingly, disclosed in embodiments of the present invention are a base station device, a user device and a wireless communication system. With the present invention, a backoff parameter can be adjusted according to the flow-control condition of the base station device, the success rate of an RRC connection or reestablishment is increased and a wireless communication system performance is improved.

Description

Method for triggering backoff, base station equipment, user equipment and system

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method for triggering backoff, a base station device, a user equipment, and a system.

Background technique

The random access process plays a vital role in the modern communication system, and is a key step for the user equipment UE (User Equipment) to access the base station equipment eNB (Enhanced NodeB) to establish a communication connection. The random access procedure accessed by multiple user equipments has competition and is therefore a random access procedure for competition. In the contention random access procedure, the user equipment first sends a random access preamble (RAP) message to the base station device, and the base station device feeds back a random access response (RAR) message according to the random access preamble message. The user equipment then sends a scheduled transmission ST (Scheduled Transmission) message to the base station device, and the base station device further feeds back a contention resolution CR (Contention Resolution) message according to the scheduling transmission message. If the user equipment does not receive the random access response RAR message fed back by the base station device, or the contention resolution fails, the user equipment performs a backoff mechanism, that is, retransmits the random access preamble message after delaying the backoff time. It should be noted that the user equipment determines the backoff time according to the backoff parameter value, and the backoff parameter value is obtained by mapping the backoff index. Further, the backoff index is randomly adopted by the base station device. The access response message is sent to the user equipment.

The Long Term Evolution (LTE) protocol in the 3rd Generation Partnership Project (3GPP) describes only the method for the base station device to send backoff parameters and the behavior of the user equipment to perform the backoff mechanism. The retreat parameters are assigned to the equipment manufacturer. In the existing backoff parameter design scheme, the base station device adjusts the value of the backoff parameter according to the number of received random access preamble messages (which can be understood as a contention access load). However, the solution does not take into account the processing capability of the base station device, that is, the backoff mechanism is not triggered when the base station device generates flow control. Since the flow control is not considered, the existing design method of the backoff parameter is not perfect, which affects the performance of the wireless communication system.

Summary of the invention

The embodiments of the present invention provide a method for triggering backoff, a base station device, a user equipment, and a system, which can adjust the backoff parameters according to the flow control status of the base station device, improve the success rate of the RRC connection or the reestablishment, and enhance the performance of the wireless communication system.

A first aspect of the embodiments of the present invention provides a method for triggering backoff, including:

Obtaining a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel;

Obtaining flow control status information, where the flow control status information is related to the number of flow control MSG3s;

Adjusting a value of the backoff index according to the contention access load and the flow control status information;

Sending, to the user equipment, a random access response message carrying the backoff index, so that the user equipment triggers backoff according to the backoff index.

In a first possible implementation manner of the first aspect, the acquiring a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel, includes:

Counting the number of the random access preamble messages received on the specified number of the physical random access channels;

Calculating the contention access load, where the contention access load is equal to a ratio of the number of random access preamble messages to the specified number.

With reference to the first aspect, and the first possible implementation manner of the first aspect, in a second possible implementation manner, the performing, by the statistics, the random access preamble message received on a specified number of the physical random access channels The number includes:

Creating a sliding window after each receiving the physical random access channel;

In the i-th sliding window, counting the number of the random access preamble messages received on the ith to i-th + PrachStatNum-1 physical random access channels, wherein the PrachStatNum indicates the designation Quantity, the i is a natural number.

With reference to the possible implementation manner of the first aspect, in a third possible implementation manner, the acquiring the flow control status information, where the flow control status information is related to the number of the flow control MSG3, includes:

Counting the number of MSGs received in a specified time period and the number of MSGs of the flow control;

Calculating a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3s;

Query the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value;

And determining, according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value, the flow control status information.

With reference to the first aspect and the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the quantity of the received MSG3 includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

The number of transmitted radio resource control reestablishment reject messages;

Not responding to the number of times the radio resource controls the connection request message;

The number of times the RRC request re-establishment request message is not responded to.

With reference to the first aspect, and the third possible implementation manner of the first aspect, in the fifth possible implementation, the flow control status information includes a high flow control condition or a low flow control condition;

Determining the flow control status information according to the relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value respectively, including:

If the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, determining that the flow control status information is a high flow control status;

And if the MSG3 flow control status is lower than the MSG3 flow control ratio lower limit, determining that the flow control status information is a low flow control status.

With reference to the first aspect, and the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the adjusting the value of the backoff index according to the contention access load and the flow control status information includes:

Querying a contention access load upper limit value and a contention access load lower limit value, and a maximum value and a minimum value of the backoff index;

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the contention access load upper limit, or the flow control status information is a high flow control condition, then Increasing the value of the backoff index;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention load load lower limit, or the flow control status information is a low flow control condition, then Decrease The value of the backoff index.

In conjunction with the first aspect and the sixth possible implementation of the first aspect, in a seventh possible implementation, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

With reference to the first aspect, and the seventh possible implementation manner of the first aspect, in the eighth possible implementation, the sending, by the user equipment, the random access response message that carries the backoff index, includes:

Determining whether the value of the back-off index is 0. If not, transmitting a random access response message carrying the back-off index to the user equipment.

A second aspect of the embodiments of the present invention provides a method for triggering backoff, including:

Receiving, by the base station device, a random access response message carrying a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, the contention access load and the The base station device is related to the number of random access preamble messages received on the physical random access channel, where the flow control status information is related to the number of flow control MSG3s on the base station device;

Determining a backoff parameter value mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as a backoff time;

The backoff is triggered according to the backoff time.

In a first possible implementation manner of the second aspect, the contention access load is equal to the number of the random access preamble messages received by the base station device on the specified number of the physical random access channels, and the designation The ratio of the number.

With reference to the possible implementation manner of the second aspect, in the second possible implementation manner, the flow control status information is that the base station device has a flow control ratio upper limit value and a MSG3 flow control ratio lower limit according to the MSG3 flow control ratio respectively. The magnitude relationship of the values is determined, and the flow control ratio is equal to a ratio of the number of MSGs of the flow control to the number of MSG3s received by the base station device.

With reference to the second aspect and the second possible implementation manner of the second aspect, in a third possible implementation manner, the quantity of the received MSG3 includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

With reference to the second aspect, and the second possible implementation manner of the second aspect, in a fourth possible implementation, the flow control status information includes a high flow control condition or a low flow control condition;

The flow control status information is determined by the base station device in the following manner:

With reference to the second aspect and the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the value of the backoff index is determined by the base station device by:

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the contention load load upper limit, or the flow control status information is a high flow control condition, increase the The value of the backoff index;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention competition load lower limit, or the flow control status information is a low flow control condition, then the reduction is performed. The value of the backoff index.

With reference to the second aspect and the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

A third aspect of the embodiments of the present invention provides a base station device, including:

a load acquisition module, configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel;

An information obtaining module, configured to acquire flow control status information, where the flow control status information is related to the number of MSG3s of the flow control;

An index adjustment module, configured to adjust a value of the backoff index according to the contention access load and the flow control status information;

The message sending module is configured to send a random access response message carrying the backoff index to the user equipment, so that the user equipment triggers the backoff according to the backoff index.

In a first possible implementation manner of the third aspect, the load acquiring module includes:

a preamble statistics unit, configured to count the number of the random access preamble messages received on the specified number of the physical random access channels;

And a load calculation unit, configured to calculate the contention access load, where the contention access load is equal to a ratio of the number of the random access preamble messages to the specified number.

With reference to the third aspect and the first possible implementation manner of the third aspect, in the second possible implementation manner, the preamble statistics unit is specifically configured to:

With reference to the possible implementation manner of the third aspect, in a third possible implementation manner, the information acquiring module includes:

An MSG3 statistic unit, configured to count the number of MSG3s received in a specified time period and the number of MSG3s of the flow control;

a ratio calculation unit, configured to calculate a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3s;

The threshold query unit is configured to query the upper limit value of the flow control ratio of the MSG3 and the lower limit value of the flow control ratio of the MSG3;

The information determining unit is configured to determine the flow control status information according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

With reference to the third aspect and the third possible implementation manner of the third aspect, in the fourth possible implementation manner, the quantity of the received MSG3 includes the following total:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

Combining the third aspect with the third possible implementation of the third aspect, in the fifth possible implementation Wherein the flow control status information comprises a high flow control condition or a low flow control condition;

The information determining unit is specifically configured to:

With reference to the third aspect, and the fifth possible implementation manner of the third aspect, in the sixth possible implementation, the exponential adjustment module includes:

a threshold query unit, configured to query a contention access load upper limit value and a contention access load lower limit value, and a maximum value and a minimum value of the backoff index;

An exponential increasing unit, configured to: when the value of the backoff index is less than a maximum value of the backoff index, if the contention access load is higher than the contention limit of the contention access load, or the flow control status information For a high flow control condition, increase the value of the backoff index;

An exponential reducing unit, configured to: when the value of the backoff index is greater than a minimum value of the backoff index, if the contention access load is lower than the contention load load lower limit, or the flow control status information For low flow control conditions, the value of the backoff index is reduced.

With reference to the third aspect and the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

With reference to the third aspect, and the seventh possible implementation manner of the third aspect, in the eighth possible implementation, the message sending module is specifically configured to determine whether the value of the backoff index is 0, if not, The user equipment sends a random access response message carrying the backoff index.

A fourth aspect of the embodiments of the present invention provides a user equipment, including:

a message receiving module, configured to receive a random access response message that is sent by the base station device and that carries a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, where the competition is performed. The access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, where the flow control status information is related to the number of the flow control MSG3 on the base station device;

a time determining module, configured to determine a backoff parameter value mapped by the backoff index, and randomly select a value between 0 and the backoff parameter value as a backoff time;

The backoff triggering module is configured to trigger the backoff according to the backoff time.

In a first possible implementation manner of the fourth aspect, the contention access load is equal to the number of the random access preamble messages received by the base station device on the specified number of the physical random access channels, and the designation The ratio of the number.

With reference to the possible implementation manner of the fourth aspect, in the second possible implementation manner, the flow control status information is that the base station device is in accordance with the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit respectively. The magnitude relationship of the values is determined, and the flow control ratio is equal to a ratio of the number of MSGs of the flow control to the number of MSG3s received by the base station device.

With reference to the fourth aspect, and the second possible implementation manner of the fourth aspect, in a third possible implementation manner, the quantity of the received MSG3 includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

With reference to the fourth aspect, and the second possible implementation manner of the fourth aspect, in a fourth possible implementation, the flow control status information includes a high flow control condition or a low flow control condition;

With reference to the fourth aspect, and the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the value of the backoff index is determined by the base station device by:

When the value of the backoff index is greater than the minimum value of the backoff index, if the competitive access load is low The value of the backoff index is decreased when the content of the load access lower limit value or the flow control status information is a low flow control condition.

With reference to the fourth aspect and the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

A fifth aspect of the embodiments of the present invention provides a wireless communication system, where the wireless communication system includes the base station device provided by the third aspect, and the user equipment provided by the fourth aspect, where:

The base station device is configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel, and acquire flow control status information, where the flow control status is The information is related to the number of the flow control MSG3; the value of the backoff index is adjusted according to the contention access load and the flow control status information; and the random access response message carrying the backoff index is sent to the user equipment, So that the user equipment triggers the backoff according to the backoff index;

The user equipment is configured to receive a random access response message that is sent by the base station device and carries a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, The contention access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, and the flow control status information is related to the number of the flow control MSG3 on the base station device; The value of the backoff parameter mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as the backoff time; and triggering the backoff according to the backoff time.

A sixth aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the method for triggering backoff provided by the first aspect.

A seventh aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores a program, and the program includes some or all of the steps of the method for triggering backoff provided by the second aspect.

An eighth aspect of the embodiments of the present invention provides a base station device, including: a processor, an antenna interface, and a memory, where a program is stored in the memory, and the processor is configured to call a process stored in the memory. Order, used to do the following:

A ninth aspect of the embodiments of the present invention provides a user equipment, including: a processor, an antenna interface, and a memory, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory, to perform the following operations:

The backoff is triggered according to the backoff time.

It can be seen that the base station device in the embodiment of the present invention adjusts the value of the backoff index according to the obtained contention access load and the flow control status information, where the contention access load is received on the physical random access channel. The number of the random access preamble messages is related, and the flow control status information is related to the number of the flow control MSG3, and the random access response message carrying the backoff index is sent to the user equipment, and the user equipment triggers the backoff according to the backoff index, which can be improved. The success rate of RRC connection or re-establishment enhances the performance of the wireless communication system.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention, the drawings, which are used in the embodiments, will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. In terms of personnel, based on the premise of not doing creative work, The drawings obtain other figures.

1 is a schematic flowchart of a method for triggering backoff according to an embodiment of the present invention;

2 is a schematic flowchart of another method for triggering backoff according to an embodiment of the present invention;

3 is a schematic flowchart of still another method for triggering backoff according to an embodiment of the present invention;

4 is a schematic flowchart of still another method for triggering backoff according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station device according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a load acquisition module according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an information acquiring module according to an embodiment of the present invention;

8 is a schematic structural diagram of an index adjustment module according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another base station device according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of a contention random access procedure 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 embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention may be applied to various communication systems, such as a Long Term Evolution (LTE) system, and an OFDM Frequency Division Duplex (FDD). System, LTE Time Division Duplex ("TDD").

It should be understood that, in the embodiment of the present invention, a user equipment (User Equipment, referred to as "UE") may be referred to as a terminal (Mobile), a mobile station ("MS" for short) or a mobile terminal (Mobile Terminal). And so on, the user equipment can communicate with one or more core networks via a Radio Access Network ("RAN"), for example, the user equipment can be a mobile phone (or "cellular" phone) Or a computer having a mobile terminal, etc., for example, the user equipment is also It can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with a wireless access network. In the embodiment of the present invention, the base station may be an evolved base station (Evolutional Node B, referred to as "eNB") in LTE.

For the sake of understanding, the LTE system is taken as an example to introduce the contention random access procedure. The random access procedure of the competition is a random access procedure in which multiple user equipments compete for access. Referring to FIG. 13 is a schematic diagram of a contention of a random access procedure, where the process is divided into four steps: Step 1: A plurality of user equipments send a random access preamble (RAP) message to the base station device; In the second step, the base station device sends a random access response (RAR) message to each user equipment. In step 3, the user equipment sends a scheduled transmission ST (Scheduled Transmission) message to the base station device through the MSG3. Establishing an RRC (Radio Resource Control) connection, it is pointed out that the user equipment and the base station equipment after the RRC connection can be connected to the third layer information of the control plane; and in step 4, the base station equipment sends the user to the user through the MSG4. The device sends a Contention Resolution (CR) message. The main purpose of the message is two. The first is to respond to MSG3 (including consent and rejection), and the second is to resolve the contention conflict (for example, two or more user equipments send The random access preamble messages have the same resources, causing conflicts). Further, if the user equipment does not receive the random access response message or the contention conflict resolution fails in the foregoing process, the backoff mechanism is performed, that is, the random access preamble message is resent after the backoff time is delayed. It should be noted that the user equipment randomly selects a value as a backoff time with an equal probability between 0 and a backoff parameter value. It should be noted that the backoff parameter value is obtained by mapping a backoff index, wherein the mapping relationship between the backoff parameter value and the backoff index can be as shown in Table 1. Further, the backoff index is sent by the base station device to the user equipment by using a random access response message.

Table 1

退避指数Backoff index	退避参数值(ms)Backoff parameter value (ms)
退避指数Backoff index	退避参数值(ms)Backoff parameter value (ms)	00	00
11	1010	00	00
11	1010	22	2020
33	3030	22	2020

44	4040
44	4040	55	6060
66	8080	55	6060
66	8080	77	120120
88	160160	77	120120
88	160160	99	240240
1010	320320	99	240240
1010	320320	1111	480480
1212	960960	1111	480480
1212	960960	1313	保留的reserved
1414	保留的reserved	1313	保留的reserved
1414	保留的reserved	1515	保留的reserved

FIG. 1 is a schematic flowchart of a method for triggering backoff according to an embodiment of the present invention. The flow of the method for triggering backoff in this embodiment as shown in the figure may include:

S101. Acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel.

The physical random access channel (PRACH) is the channel that the user equipment first accesses when initiating a call, and then establishes an RRC connection according to the indication of the base station device, which is the key of the call process.

Specifically, the manner in which the base station device obtains the contention of the competition access can be implemented by the following two steps:

Step 1. Count the number of random access preamble messages received on the specified number of physical random access channels.

In the embodiment of the present invention, the specified number is represented by the parameter PrachStatNum, and the value of the PrachStatNum can be preset by the designer, for example, setting PrachStatNum=10 or the like.

During the specific implementation process, the base station device can use the sliding window statistics to count the number of random access preamble messages received on the PrachStatNum physical random access channels, as follows:

First, after each physical random access channel is received, create a sliding window; then at the i The sliding window counts the number of random access preamble messages received on the i-th to i-th + PrachStatNum-1 physical random access channels, and is recorded as ConPreambleNum. For example, assuming that PrachStatNum=10, the base station device counts the number of random access preamble messages received on the third to twelfth physical random access channels in the third sliding window.

Step 2: Calculate the contention access load, and the contention access load is equal to the ratio of the number of random access preamble messages to the specified number.

In the specific implementation process, the contention access load = ConPreambleNum/PrachStatNum.

S102. Acquire flow control status information, where the flow control status information is related to the number of MSG3s of the flow control.

Specifically, the manner in which the base station device obtains the flow control status information can be implemented in the following four steps:

Step 1. Count the number of MSG3s received in the specified time period and the number of MSG3s in the flow control.

Optionally, the number of MSG3s received by the base station device includes the following totals:

1 The number of received Radio Resource Control Connection Request (RRC Connection Request) messages;

2 The number of received RRC Connection Reestablishment Request messages.

Optionally, the number of MSG3s that are controlled by the base station device flow includes the following totals:

1 The number of RRC Connection Reject messages sent;

2 The number of RRC Connection Reestablishment Reject messages sent;

3 not responding to the number of times the radio resource controls the connection request message;

4 does not respond to the number of times the radio resource control reestablishment request message.

In the embodiment of the present invention, the specified time period is represented by the parameter FlowCtrlStatPeriod, and the value of the FlowCtrlStatPeriod can be preset by the designer. In addition, the number of received MSG3 is represented by the parameter ReceiveMsg3Num, and the number of MSG3 of the flow control is represented by the parameter FlowCtrlMsg3Num.

In the specific implementation process, at the beginning of each FlowCtrlStatPeriod, ReceiveMsg3Num=0 and FlowCtrlMsg3Num=0 are initialized, and within the FlowCtrlStatPeriod, the base is After receiving a radio resource control connection request message or receiving a radio resource control reestablishment request message, the station device performs ReceiveMsg3Num=ReceiveMsg3Num+1; after receiving a radio resource control connection reject message, the base station device receives or receives After a radio resource control reestablishment reject message, or after performing a non-response radio resource control connection request message, or after performing a non-response radio resource control reestablishment request message, execute FlowCtrlMsg3Num=FlowCtrlMsg3Num+1.

Step 2: Calculate a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of received MSG3s.

In the specific implementation process, the MSG3 flow control ratio is FlowCtrlMsg3Num/ReceiveMsg3Num.

Step 3: Query the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

In the embodiment of the present invention, the MSG3 flow control ratio upper limit value is represented by the parameter FlowCtrlMsg3HighRatio, and the MSG3 flow control ratio lower limit value is represented by the parameter FlowCtrlMsg3LowRatio, wherein the values of the FlowCtrlMsg3HighRatio and the FlowCtrlMsg3LowRatio can be preset by the designer.

Step 4: Determine the flow control status information according to the relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

In the specific implementation process, if the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, the flow control status information is determined to be a high flow control condition; if the flow control status of the MSG3 is lower than the lower limit of the flow control ratio of the MSG3, the flow is determined. The control status information is a low flow control condition.

In the embodiment of the present invention, the flow control status information is represented by a parameter FlowCtrlMSG3Sign, and the value is -1, 0 or 1. Among them, FlowCtrlMSG3Sign=-1 indicates low flow control status; FlowCtrlMSG3Sign=1 indicates high flow control status, and FlowCtrlMSG3Sign=0 indicates normal flow control status.

As an optional example, at the beginning of each FlowCtrlStatPeriod, FlowCtrlMSG3Sign=-1 is initialized, and after each FlowCtrlStatPeriod ends, FlowCtrlMSG3Sign is updated according to the MSG3 flow control ratio, where:

If FlowCtrlMsg3Num/ReceiveMsg3Num=0, keep FlowCtrlMSG3Sign unchanged;

If FlowCtrlMsg3Num/ReceiveMsg3Num>FlowCtrlMsg3HighRatio, then FlowCtrlMSG3Sign=1;

If FlowCtrlMsg3Num/ReceiveMsg3Num<FlowCtrlMsg3LowRatio, then make FlowCtrlMSG3Sign=-1;

Otherwise, let FlowCtrlMSG3Sign=0.

S103. Adjust a value of the backoff index according to the contention access load and the flow control status information.

During the specific implementation process, the base station equipment first queries the upper limit of the contention of the competitive access load and the lower limit of the competitive access load, and the maximum and minimum values of the backoff index, and then execute:

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the upper limit of the contention access load, or the flow control status information is a high flow control condition, the value of the backoff index is increased;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the lower limit of the contention access load, or the flow control status information is a low flow control condition, the value of the backoff index is decreased.

Optionally, refer to Table 1 again. In the embodiment of the present invention, the maximum value of the backoff index is set to 12 according to the description in the 3GPP protocol, and the minimum value of the set backoff index is 0.

In the embodiment of the present invention, the competition access load upper limit value is represented by a parameter ConRaloadHighThd, and the contention limit load lower limit value is represented by a parameter ConRaloadLowThd, wherein the values of ConRaloadHighThd and ConRaloadLowThd can be preset by a designer.

As an optional example, after each sliding window is counted, adjust the backoff index according to the following principles:

When the value of the backoff index is less than 12, if ConPreambleNum/PrachStatNum>ConRaLoadHighThd, or FlowCtrlMsg3Sign=1, the backoff index increases by 1;

When the value of the backoff index is greater than 0, if ConPreambleNum/PrachStatNum<ConRaLoadHighThd, or FlowCtrlMsg3Sign=-1, the backoff index is decreased by 1;

Otherwise, the backoff index remains the same.

S104. Send a random access response message carrying the backoff index to the user equipment, so that the user equipment triggers the backoff according to the backoff index.

Specifically, the base station device determines whether the value of the backoff index is 0. If not, the base station device sends a random access response message carrying the backoff index, that is, a random access response message filled with the backoff index field.

Further, the user equipment receives the random access response message that is sent by the base station device and carries the backoff index, and then determines the backoff parameter value mapped by the backoff index, and the probability is between 0 and the backoff parameter value. A value is randomly selected as the backoff time, and finally the backoff is triggered according to the backoff time.

2 is a schematic flowchart of another method for triggering backoff in the embodiment of the present invention, which may include:

S201. Count the number of random access preamble messages received on the specified number of physical random access channels.

Specifically, the base station device can use the sliding window statistics manner to count the number of random access preamble messages received on the PrachStatNum physical random access channels, as follows:

First, after each physical random access channel is received, a sliding window is created; then, in the i-th sliding window, the random connections received on the i-th to i-th + PrachStatNum-1 physical random access channels are counted. The number of incoming pre-message messages is recorded as ConPreambleNum. For example, assuming that PrachStatNum=10, the base station device counts the number of random access preamble messages received on the third to twelfth physical random access channels in the third sliding window.

S202. Calculate a contention access load, where the contention access load is equal to a ratio of the number of the random access preamble messages to the specified number.

Specifically, the contention access load = ConPreambleNum/PrachStatNum.

S203. Count the number of MSG3s received in the specified time period and the number of MSG3s of the flow control.

2 The number of received RRC Connection Reestablishment Request messages.

1 The number of RRC Connection Reject messages sent;

2 The number of RRC Connection Reestablishment Reject messages sent;

Specifically, at the beginning of each FlowCtrlStatPeriod, ReceiveMsg3Num=0 and FlowCtrlMsg3Num=0 are initialized, and after receiving a RRC connection request message or receiving a RRC control reestablishment request message, the base station device receives the RRC message in the FlowCtrlStatPeriod. Perform ReceiveMsg3Num=ReceiveMsg3Num+1; after receiving a radio resource control connection reject message, or after receiving a radio resource control reestablishment reject message, or after performing a non-response radio resource control connection request message, the base station device may perform one time or not. After responding to the RRC Reconstruction Request message, execute FlowCtrlMsg3Num=FlowCtrlMsg3Num+1.

S204. Calculate a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3.

Specifically, the MSG3 flow control ratio = FlowCtrlMsg3Num/ReceiveMsg3Num.

S205: Query the upper limit value of the flow control ratio of the MSG3 and the lower limit value of the flow control ratio of the MSG3.

S206. Determine, according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value, the flow control status information.

Specifically, if the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, the flow control status information is determined to be a high flow control status; if the flow control status of the MSG3 is lower than the lower limit of the flow control ratio of the MSG3, the flow control status is determined. The information is in a low flow control situation.

If FlowCtrlMsg3Num/ReceiveMsg3Num=0, keep FlowCtrlMSG3Sign unchanged;

Otherwise, let FlowCtrlMSG3Sign=0.

S207. Adjust a value of the backoff index according to the contention access load and the flow control status information.

Specifically, the base station device first queries the upper limit value of the contention access load and the lower limit value of the contention access load, and the maximum and minimum values of the backoff index, and then executes:

In the embodiment of the present invention, the competitive access load upper limit is represented by a parameter ConRaloadHighThd. The value of the competitive access load lower limit value is represented by the parameter ConRaloadLowThd, wherein the values of ConRaloadHighThd and ConRaloadLowThd can be preset by the designer.

Otherwise, the backoff index remains the same.

S208. Send a random access response message carrying the backoff index to the user equipment, so that the user equipment triggers the backoff according to the backoff index.

Further, the user equipment receives the random access response message that is sent by the base station device and carries the backoff index, determines the backoff parameter value mapped by the backoff index, and randomly selects a value between 0 and the backoff parameter value as the backoff time. Finally, the backoff is triggered according to the backoff time.

FIG. 3 is a schematic flowchart of another method for triggering backoff in an embodiment of the present invention, which may include:

S301. The base station device acquires a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel.

The physical random access channel (PRACH) is a channel that is first accessed when the user equipment initiates a call, and then establishes an RRC connection according to the indication of the base station device. It is the key to the calling process.

S302. The base station device acquires flow control status information, where the flow control status information is related to the number of flow control MSG3s.

2 The number of received RRC Connection Reestablishment Request messages.

1 The number of RRC Connection Reject messages sent;

2 RRC Connection Reestablishment Reject The number of messages;

In the specific implementation process, at the beginning of each FlowCtrlStatPeriod, ReceiveMsg3Num=0 and FlowCtrlMsg3Num=0 are initialized, and within the FlowCtrlStatPeriod, the base station device receives a radio resource control connection request message or receives a radio resource control reestablishment request message. Then, ReceiveMsg3Num=ReceiveMsg3Num+1 is executed; after receiving a radio resource control connection reject message, or after receiving a radio resource control reestablishment reject message, or after performing a non-response radio resource control connection request message, the base station device may perform After not responding to the RRC Reconstruction Request message once, execute FlowCtrlMsg3Num=FlowCtrlMsg3Num+1.

In the embodiment of the present invention, the flow control status information is represented by a parameter FlowCtrlMSG3Sign, and the value is -1, 0 or 1. Where FlowCtrlMSG3Sign=-1 indicates a low flow control condition; FlowCtrlMSG3Sign=1 indicates a high flow control condition, and FlowCtrlMSG3Sign=0 indicates a normal flow control condition.

If FlowCtrlMsg3Num/ReceiveMsg3Num=0, keep FlowCtrlMSG3Sign unchanged;

Otherwise, let FlowCtrlMSG3Sign=0.

S303. The base station device adjusts a value of the backoff index according to the contention access load and the flow control status information.

Otherwise, the backoff index remains the same.

S304. The base station device sends a random access response message carrying the backoff index to the user equipment.

S305. The user equipment receives a random access response message that is sent by the base station device and carries a backoff index.

S306. The user equipment determines a backoff parameter value mapped by the backoff index, and randomly selects a value between 0 and the backoff parameter value as a backoff time.

Specifically, the user equipment may determine the value of the backoff parameter mapped by the backoff index according to the mapping relationship of Table 1, and details are not described herein again.

S307. The user equipment triggers the backoff according to the backoff time.

Specifically, after delaying the backoff time, the user equipment sends the random access preamble message to the base station device again.

FIG. 4 is a schematic flowchart of another method for triggering backoff in an embodiment of the present invention, which may include:

S401. The base station device counts the number of random access preamble messages received on the specified number of physical random access channels.

S402. The base station device calculates a contention access load, where the contention access load is equal to a ratio of the number of the random access preamble messages to the specified number.

Specifically, the contention access load = ConPreambleNum/PrachStatNum.

S403. The base station device collects the number of MSG3s received in the specified time period and the number of MSG3s of the flow control.

2 The number of received RRC Connection Reestablishment Request messages.

1 The number of RRC Connection Reject messages sent;

2 The number of RRC Connection Reestablishment Reject messages sent;

In the embodiment of the present invention, the specified time period is represented by the parameter FlowCtrlStatPeriod, and the value of the FlowCtrlStatPeriod can be preset by the designer. In addition, the number of received MSG3 is represented by the parameter ReceiveMsg3Num, which is represented by the parameter FlowCtrlMsg3Num. The number of flow control MSG3.

S404. The base station device calculates a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3.

Specifically, the MSG3 flow control ratio = FlowCtrlMsg3Num/ReceiveMsg3Num.

S405. The base station device queries the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

S406. The base station device determines the flow control status information according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

If FlowCtrlMsg3Num/ReceiveMsg3Num=0, keep FlowCtrlMSG3Sign not change;

Otherwise, let FlowCtrlMSG3Sign=0.

S407. The base station device adjusts a value of the backoff index according to the contention access load and the flow control status information.

Otherwise, the backoff index remains the same.

S408. The base station device sends a random access response message carrying the backoff index to the user equipment.

Specifically, the base station device determines whether the value of the backoff index is 0, and if not, to the user equipment. A random access response message carrying a backoff index, that is, a random access response message filled with a backoff index field, is sent.

S409. The user equipment receives a random access response message that is sent by the base station device and carries a backoff index.

S410. The user equipment determines a backoff parameter value mapped by the backoff index, and randomly selects a value between 0 and the backoff parameter value as a backoff time.

S411. The user equipment triggers the backoff according to the backoff time.

FIG. 5 is a schematic structural diagram of a base station device according to an embodiment of the present invention. The base station device in the embodiment of the present invention may include at least a load acquisition module 510, an information acquisition module 520, an index adjustment module 530, and a message sending module 540, where:

The load obtaining module 510 is configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel. In a specific implementation, the load obtaining module 510 may further include a preamble statistics unit 511 and a load calculation unit 512 as shown in FIG. 6, where:

The preamble statistics unit 511 is configured to count the number of the random access preamble messages received on the specified number of the physical random access channels.

Specifically, the preamble statistics unit 511 can use the sliding window statistics manner to count the number of random access preamble messages received on the PrachStatNum physical random access channels, as follows:

First, after each physical random access channel is received, a sliding window is created; then, in the i-th sliding window, the random connections received on the i-th to i-th + PrachStatNum-1 physical random access channels are counted. The number of incoming pre-message messages is recorded as ConPreambleNum. For example, assuming that PrachStatNum=10, the preamble statistics unit 511 counts the number of random access preamble messages received on the third to twelfth physical random access channels in the third sliding window.

The load calculation unit 512 is configured to calculate the contention access load, where the contention access load is equal to a ratio of the number of random access preamble messages to the specified number.

Specifically, the contention access load = ConPreambleNum/PrachStatNum.

The information obtaining module 520 is configured to obtain flow control status information, where the flow control status information is related to the number of the flow control MSG3. In a specific implementation, the information acquiring module 520 may further include an MSG3 statistic unit 521, a ratio calculating unit 522, a threshold query unit 523, and an information determining unit 524, as shown in FIG. 7, wherein:

The MSG3 statistic unit 521 is configured to count the number of MSG3s received in the specified time period and the number of MSG3s of the flow control.

Optionally, the number of MSG3s received by the MSG3 statistics unit 521 includes the following totals:

2 The number of received Radio Resource Control Reestablishment Request (RRC Connection Reestablishment Request) messages.

Alternatively, the number of MSG3s flow controlled by the MSG3 statistic unit 521 includes the following totals:

1 The number of RRC Connection Reject messages sent;

2 The number of RRC Connection Reestablishment Reject messages sent;

Specifically, at the beginning of each FlowCtrlStatPeriod, ReceiveMsg3Num=0 and FlowCtrlMsg3Num=0 are initialized, and within the FlowCtrlStatPeriod, the MSG3 statistics unit 521 receives a radio resource control connection request message or receives a radio resource control reestablishment request message. Then, ReceiveMsg3Num=ReceiveMsg3Num+1 is executed; after receiving a radio resource control connection reject message, or after receiving a radio resource control reestablishment reject message, or after performing a non-response radio resource control connection request message, the MSG3 statistics unit 521 After performing a non-responding RRC re-establishment request message, execute FlowCtrlMsg3Num=FlowCtrlMsg3Num+1.

The ratio calculation unit 522 is configured to calculate a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3.

Specifically, the MSG3 flow control ratio = FlowCtrlMsg3Num/ReceiveMsg3Num.

The threshold query unit 523 is configured to query the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.

The information determining unit 524 is configured to determine the flow control status information according to the magnitude relationship between the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value, respectively, according to the MSG3 flow control ratio.

In the embodiment of the present invention, the flow control status information is represented by a parameter FlowCtrlMSG3Sign, and the value is -1, 0 or 1. Among them, FlowCtrlMSG3Sign=-1 indicates low flow control status; FlowCtrlMSG3Sign=1 indicates high flow control status, and FlowCtrlMSG3Sign=0 indicates normal flow control status condition.

If FlowCtrlMsg3Num/ReceiveMsg3Num=0, keep FlowCtrlMSG3Sign unchanged;

Otherwise, let FlowCtrlMSG3Sign=0.

The index adjustment module 530 is configured to adjust a value of the backoff index according to the contention access load and the flow control status information. In a specific implementation, the index adjustment module 530 may further include a threshold query unit 531, an index increasing unit 532, and an exponential reducing unit 533 as shown in FIG. 8, wherein:

The threshold query unit 531 is configured to query a contention access load upper limit value and a contention access load lower limit value, and a maximum value and a minimum value of the backoff index.

The index increasing unit 532 is configured to: when the value of the backoff index is less than a maximum value of the backoff index, if the contention access load is higher than the contention limit of the contention access load, or the flow control status If the information is a high flow control condition, the value of the backoff index is increased.

Otherwise, the backoff index remains the same.

The index reducing unit 533 is configured to: when the value of the backoff index is greater than a minimum value of the backoff index, if the contention access load is lower than the contention load lower limit, or the flow control status If the information is a low flow control condition, the value of the backoff index is reduced.

Otherwise, the backoff index remains the same.

The message sending module 540 is configured to send a random access response message carrying the backoff index to the user equipment, so that the user equipment triggers the backoff according to the backoff index.

Specifically, the message sending module 540 determines whether the value of the backoff index is 0. If not, the random access response message carrying the backoff index, that is, the random access response message filled with the backoff index field, is sent to the user equipment.

FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. The user equipment in the embodiment of the present invention may include at least a message receiving module 610, a time determining module 620, and a backoff triggering module 630, where:

The message receiving module 610 is configured to receive, by the base station device, a random access response message carrying a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, The contention access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, and the flow control status information is related to the number of flow control MSG3s on the base station device.

Optionally, the contention access load is equal to a ratio of the number of random access preamble messages received by the base station device on the specified number of the physical random access channels to the specified number.

Optionally, the flow control status information is determined by the base station device according to the relationship between the flow control ratio of the MSG3 and the upper limit value of the flow control ratio of the MSG3 and the lower limit value of the flow control ratio of the MSG3. The flow control ratio is equal to the ratio of the number of MSGs of the flow control to the number of MSG3s received by the base station device.

Further optionally, the number of the received MSG3s includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

Still further optionally, the flow control status information includes a high flow control condition or a low flow control condition;

Further optionally, the value of the backoff index is determined by the base station device in the following manner:

Alternatively, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

The time determining module 620 is configured to determine a backoff parameter value mapped by the backoff index, and randomly select a value between the 0 and the backoff parameter value as the backoff time.

Specifically, the time determining module 620 can determine the value of the backoff parameter mapped by the backoff index according to the mapping relationship of Table 1, and details are not described herein again.

The backoff triggering module 630 is configured to trigger the backoff according to the backoff time.

Specifically, the backoff triggering module 630 sends the random access preamble message to the base station device again after delaying the backoff time.

FIG. 10 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention, including the base station device 710 and the user equipment 720 as shown in FIG.

The base station device 710 is configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel, and obtain flow control status information, where the flow control The status information is related to the number of the flow control MSG3; the value of the backoff index is adjusted according to the contention access load and the flow control status information; and the random access response carrying the backoff index is sent to the user equipment 720 a message, so that the user equipment 720 triggers the backoff according to the backoff index;

The user equipment 720 is configured to receive, by the base station device 710, a random access response message carrying a backoff index, where the value of the backoff index is determined by the base station device according to the contention access load and the flow control status information. Adjusting, the contention access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, the flow control status information and the number of MSG3 flow control on the base station device Correlation; determining a backoff parameter value mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as a backoff time; and triggering backoff according to the backoff time.

FIG. 11 is a schematic structural diagram of another base station device according to an embodiment of the present invention. As shown in FIG. 11, the base station device may include: at least one processor 801, such as a CPU, at least one antenna interface 803, and a memory 804, at least one. Communication bus 802. Among them, the communication bus 802 is used to implement connection communication between these components. The memory 804 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. Optionally, the memory 804 may also be at least one storage device located away from the foregoing processor 801. A set of program codes is stored in the memory 804, and the processor 801 is configured to call the program code stored in the memory 804 for performing the following operations:

Optionally, the processor 801 performs a process of acquiring a contention access load, where the contention related to the number of random access preamble messages received on the physical random access channel is:

Further, the specific operation of the processor 801 to perform statistics on the number of the random access preamble messages received on the specified number of the physical random access channels is:

Optionally, the processor 801 performs the process of acquiring the flow control status information, where the flow control status information is related to the number of the flow control MSG3:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

Further, optionally, the flow control status information includes a high flow control condition or a low flow control status, and the processor 801 respectively controls the flow control ratio upper limit value and the MSG3 flow control according to the MSG3 flow control ratio. The size of the lower limit value, the specific operation of determining the flow control status information is:

Further, optionally, the processor 801 performs a specific operation of adjusting a value of the backoff index according to the contention access load and the flow control status information:

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention load load lower limit, or the flow control status information is a low flow control condition, then The value of the backoff index is reduced.

Optionally, the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.

Optionally, the specific operation of the processor 801 to send the random access response message carrying the backoff index to the user equipment is:

Specifically, the base station device introduced in this embodiment may be used to implement some or all of the steps of the method for triggering backoff described in conjunction with FIG. 1 to FIG. 4 in the embodiment of the present invention.

FIG. 12 is a schematic structural diagram of another user in the embodiment of the present invention. As shown in FIG. 12, the base station device may include: at least one processor 901, such as a CPU, at least one antenna interface 903, and a memory 904, at least one communication. Bus 902. Wherein, the communication bus 902 is used to implement these components Communication between the connections. The memory 904 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. Optionally, the memory 804 may also be at least one storage device located away from the foregoing processor 901. A set of program codes is stored in the memory 904, and the processor 901 is configured to call the program code stored in the memory 904 for performing the following operations:

The backoff is triggered according to the backoff time.

Specifically, the base station device introduced in this embodiment may be used to implement some steps in the method for triggering backoff described in conjunction with FIG. 3 to FIG. 4 in the embodiment of the present invention.

The embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program, and the program includes a plurality of instructions for performing part of the method for triggering backoff described in the embodiments of the present invention. Or all the steps.

Another embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program includes a plurality of instructions for performing the method of triggering backoff described in the embodiments of the present invention, as shown in FIG. 3 to FIG. Part of the steps.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A method for triggering backoff, characterized in that the method comprises:

Obtaining a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel;

Obtaining flow control status information, where the flow control status information is related to the number of flow control MSG3s;

Adjusting a value of the backoff index according to the contention access load and the flow control status information;

Sending, to the user equipment, a random access response message carrying the backoff index, so that the user equipment triggers backoff according to the backoff index.
The method of claim 1, wherein the obtaining a contention access load, the contention access load is related to the number of random access preamble messages received on the physical random access channel, including:

Counting the number of the random access preamble messages received on the specified number of the physical random access channels;

Calculating the contention access load, where the contention access load is equal to a ratio of the number of random access preamble messages to the specified number.
The method according to claim 2, wherein the counting the number of the random access preamble messages received on the specified number of the physical random access channels comprises:

Creating a sliding window after each receiving the physical random access channel;

In the i-th sliding window, counting the number of the random access preamble messages received on the ith to i-th + PrachStatNum-1 physical random access channels, wherein the PrachStatNum indicates the designation Quantity, the i is a natural number.
The method of claim 1, wherein the obtaining the flow control status information, the flow control status information is related to the number of the flow control MSG3, including:

Counting the number of MSGs received in a specified time period and the number of MSGs of the flow control;

Calculating a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3s;

Query the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value;

And determining, according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value, the flow control status information.
The method of claim 4 wherein said number of received MSGs comprises the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

The number of transmitted radio resource control reestablishment reject messages;

Not responding to the number of times the radio resource controls the connection request message;

The number of times the RRC request re-establishment request message is not responded to.
The method of claim 4, wherein the flow control status information comprises a high flow control condition or a low flow control condition;

Determining the flow control status information according to the relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value respectively, including:

If the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, determining that the flow control status information is a high flow control status;

And if the MSG3 flow control status is lower than the MSG3 flow control ratio lower limit, determining that the flow control status information is a low flow control status.
The method according to claim 6, wherein the adjusting the value of the backoff index according to the contention access load and the flow control status information comprises:

Querying a contention access load upper limit value and a contention access load lower limit value, and a maximum value and a minimum value of the backoff index;

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the contention access load upper limit, or the flow control status information is a high flow control condition, then Increasing the value of the backoff index;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention load load lower limit, or the flow control status information is a low flow control condition, then The value of the backoff index is reduced.
The method of claim 7, wherein the maximum value of the backoff index is 12 and the minimum value of the backoff index is zero.
The method of claim 8, wherein the transmitting, to the user equipment, the random access response message carrying the backoff index comprises:

Determining whether the value of the back-off index is 0. If not, transmitting a random access response message carrying the back-off index to the user equipment.
A method for triggering backoff, characterized in that the method comprises:

Receiving, by the base station device, a random access response message carrying a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, the contention access load and the The base station device is related to the number of random access preamble messages received on the physical random access channel, where the flow control status information is related to the number of flow control MSG3s on the base station device;

Determining a backoff parameter value mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as a backoff time;

The backoff is triggered according to the backoff time.
The method according to claim 10, wherein said contention access load is equal to the number of random access preamble messages received by said base station device on said specified number of said physical random access channels and said designation The ratio of the number.
The method according to claim 10, wherein the flow control status information is determined by the base station device according to the relationship between the flow control ratio of the MSG3 and the upper limit value of the flow control ratio of the MSG3 and the lower limit value of the flow control ratio of the MSG3. The flow control ratio is equal to a ratio of the number of MSGs of the flow control to the number of MSG3s received by the base station device.
The method of claim 12 wherein said number of received MSGs comprises the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

The number of transmitted radio resource control reestablishment reject messages;

Not responding to the number of times the radio resource controls the connection request message;

The number of times the RRC request re-establishment request message is not responded to.
The method of claim 12, wherein the flow control status information comprises a high flow control condition or a low flow control condition;

The flow control status information is determined by the base station device in the following manner:

If the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, determining that the flow control status information is a high flow control status;

And if the MSG3 flow control status is lower than the MSG3 flow control ratio lower limit, determining that the flow control status information is a low flow control status.
The method of claim 14, wherein the value of the backoff index is determined by the base station device in the following manner:

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the contention load load upper limit, or the flow control status information is a high flow control condition, increase the The value of the backoff index;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention competition load lower limit, or the flow control status information is a low flow control condition, then the reduction is performed. The value of the backoff index.
The method of claim 15 wherein the maximum value of the backoff index is 12 and the minimum value of the backoff index is zero.
A base station device, where the base station device includes:

a load acquisition module, configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel;

An information obtaining module, configured to acquire flow control status information, where the flow control status information is related to the number of MSG3s of the flow control;

An index adjustment module, configured to adjust a value of the backoff index according to the contention access load and the flow control status information;

The message sending module is configured to send a random access response message carrying the backoff index to the user equipment, so that the user equipment triggers the backoff according to the backoff index.
The base station device according to claim 17, wherein the load acquisition module comprises:

a preamble statistics unit, configured to count the number of the random access preamble messages received on the specified number of the physical random access channels;

And a load calculation unit, configured to calculate the contention access load, where the contention access load is equal to a ratio of the number of the random access preamble messages to the specified number.
The base station device according to claim 18, wherein the preamble statistics unit is specifically configured to:

Creating a sliding window after each receiving the physical random access channel;

In the i-th sliding window, counting the number of the random access preamble messages received on the ith to i-th + PrachStatNum-1 physical random access channels, wherein the PrachStatNum indicates the designation Quantity, the i is a natural number.
The base station device according to claim 17, wherein the information acquisition module comprises:

An MSG3 statistic unit, configured to count the number of MSG3s received in a specified time period and the number of MSG3s of the flow control;

a ratio calculation unit, configured to calculate a flow control ratio of the MSG3, where the flow control ratio is equal to a ratio of the number of MSG3s of the flow control to the number of the received MSG3s;

The threshold query unit is configured to query the upper limit value of the flow control ratio of the MSG3 and the lower limit value of the flow control ratio of the MSG3;

The information determining unit is configured to determine the flow control status information according to the magnitude relationship between the MSG3 flow control ratio and the MSG3 flow control ratio upper limit value and the MSG3 flow control ratio lower limit value.
The base station device according to claim 20, wherein the number of the received MSG3s includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

The number of transmitted radio resource control reestablishment reject messages;

Not responding to the number of times the radio resource controls the connection request message;

The number of times the RRC request re-establishment request message is not responded to.
The base station device according to claim 20, wherein the flow control status information comprises a high flow control condition or a low flow control condition;

The information determining unit is specifically configured to:

If the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, determining that the flow control status information is a high flow control status;

And if the MSG3 flow control status is lower than the MSG3 flow control ratio lower limit, determining that the flow control status information is a low flow control status.
The base station device according to claim 22, wherein the index adjustment module comprises:

a threshold query unit, configured to query a contention access load upper limit value and a contention access load lower limit value, and a maximum value and a minimum value of the backoff index;

An exponential increasing unit, configured to: when the value of the backoff index is less than a maximum value of the backoff index, if the contention access load is higher than the contention limit of the contention access load, or the flow control status information For a high flow control condition, increase the value of the backoff index;

An exponential reducing unit, configured to: when the value of the backoff index is greater than a minimum value of the backoff index, if the contention access load is lower than the contention load load lower limit, or the flow control status information For low flow control conditions, the value of the backoff index is reduced.
The base station apparatus according to claim 23, wherein the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.
The base station device according to claim 24, wherein the message sending module is configured to determine whether the value of the backoff index is 0, and if not, send a randomness carrying the backoff index to the user equipment. Access response message.
A user equipment, where the user equipment includes:

a message receiving module, configured to receive a random access response message that is sent by the base station device and that carries a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, where the competition is performed. The access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, where the flow control status information is related to the number of the flow control MSG3 on the base station device;

a time determining module, configured to determine a backoff parameter value mapped by the backoff index, and randomly select a value between 0 and the backoff parameter value as a backoff time;

The backoff triggering module is configured to trigger the backoff according to the backoff time.
The user equipment according to claim 26, wherein the contention access load is equal to the number of random access preamble messages received by the base station device on a specified number of the physical random access channels, The specified number of ratios.
The user equipment according to claim 26, wherein the flow control status information is a relationship between a flow control ratio of the MSG3 and a flow control ratio upper limit value of the MSG3 and a flow control ratio lower limit value of the MSG3 according to a flow ratio of the MSG3. Determining, the flow control ratio is equal to a ratio of the number of MSGs of the flow control to the number of MSG3s received by the base station device.
The user equipment according to claim 28, wherein the number of the received MSGs 3 includes the following totals:

The number of received radio resource control connection request messages;

The number of received radio resource control reestablishment request messages;

The number of flow control MSG3s, including the following totals:

The number of wireless resource control connection rejection messages sent;

The number of transmitted radio resource control reestablishment reject messages;

Not responding to the number of times the radio resource controls the connection request message;

The number of times the RRC request re-establishment request message is not responded to.
The user equipment according to claim 28, wherein the flow control status information comprises a high flow control condition or a low flow control condition;

The flow control status information is determined by the base station device in the following manner:

If the flow control status of the MSG3 is higher than the upper limit of the flow control ratio of the MSG3, determining that the flow control status information is a high flow control status;

And if the MSG3 flow control status is lower than the MSG3 flow control ratio lower limit, determining that the flow control status information is a low flow control status.
The user equipment according to claim 30, wherein the value of the backoff index is determined by the base station device in the following manner:

When the value of the backoff index is less than the maximum value of the backoff index, if the contention access load is higher than the contention load load upper limit, or the flow control status information is a high flow control condition, increase the The value of the backoff index;

When the value of the backoff index is greater than the minimum value of the backoff index, if the contention access load is lower than the contention competition load lower limit, or the flow control status information is a low flow control condition, then the reduction is performed. The value of the backoff index.
The user equipment according to claim 31, wherein the maximum value of the backoff index is 12, and the minimum value of the backoff index is 0.
A wireless communication system, comprising: the base station device according to any one of claims 17 to 25, and the user equipment according to any one of claims 26 to 32, wherein:

The base station device is configured to acquire a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel, and acquire flow control status information, where the flow control status is The information is related to the number of the flow control MSG3; the value of the backoff index is adjusted according to the contention access load and the flow control status information; and the random access response message carrying the backoff index is sent to the user equipment, So that the user equipment triggers the backoff according to the backoff index;

The user equipment is configured to receive a random access response message that is sent by the base station device and carries a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, The contention access load is related to the number of random access preamble messages received by the base station device on the physical random access channel, and the flow control status information is related to the number of the flow control MSG3 on the base station device; The value of the backoff parameter mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as the backoff time; and triggering the backoff according to the backoff time.
A computer storage medium, characterized in that the computer storage medium stores a program, and the program execution comprises the steps of any one of claims 1 to 9.
A computer storage medium, characterized in that the computer storage medium stores a program, and the program execution comprises the steps of any one of claims 10-16.
A base station device, comprising: an antenna interface, a memory, and a processor, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory, to perform the following operations:

Obtaining a contention access load, where the contention access load is related to the number of random access preamble messages received on the physical random access channel;

Obtaining flow control status information, where the flow control status information is related to the number of flow control MSG3s;

Adjusting a value of the backoff index according to the contention access load and the flow control status information;

Sending, to the user equipment, a random access response message carrying the backoff index, so that the user The device triggers the backoff according to the backoff index.
A user equipment, characterized in that the user equipment comprises an antenna interface, a memory and a processor, wherein the memory stores a set of programs, and the processor is configured to call a program stored in the memory for performing the following operations:

Receiving, by the base station device, a random access response message carrying a backoff index, where the value of the backoff index is adjusted by the base station device according to the contention access load and the flow control status information, the contention access load and the The base station device is related to the number of random access preamble messages received on the physical random access channel, where the flow control status information is related to the number of flow control MSG3s on the base station device;

Determining a backoff parameter value mapped by the backoff index, and randomly selecting a value between 0 and the backoff parameter value as a backoff time;

The backoff is triggered according to the backoff time.