CN100401840C

CN100401840C - Method for establishing connection between access network and access terminal

Info

Publication number: CN100401840C
Application number: CNB2005100088210A
Authority: CN
Inventors: 徐莹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-02-23
Filing date: 2005-02-23
Publication date: 2008-07-09
Anticipated expiration: 2025-02-23
Also published as: CN1826009A

Abstract

The present invention discloses a method for establishing a connection between an access network (AN) and an access terminal (AT). When a connection is required to be established between the AN and the AT, the method provided by the present invention determines when the AT can receive a channel assignment message from the AN before a suspension mode ends; when the AT can receive a channel assignment message from the AN before a suspension mode ends, the AN starts assigning resources to the AT directly so as to avoid the situation that the AT can not receive the message, which leads to the occurrence of failed quick connection, because the AT is already in the time slot mode when the AN delivers the channel assigning message in the method of quick connection. Consequently, the success ratio of establishing a connection between the AN and the AT in a suspension mode is increased, and the AN can deliver data to the AT in time.

Description

A kind of Access Network and the method that accesses terminal and connect

Technical field

The present invention relates to the code division multiple access field, be specifically related to a kind of Access Network and the method that accesses terminal and connect.

Background technology

In CDMA2000 1x EV-DO network, access terminal (AT, Access Terminal) has three kinds of patterns when idle condition: continuous listen mode, Suspend Mode, slotted mode.The appearance order and the concrete state of these three kinds of patterns are:

When Suspend Mode: AT has just changed idle condition over to from connection status, can be in this pattern for some time, the control channel of AT continuous monitoring Access Network this moment (AN, Access Network);

Slotted mode: Suspend Mode finishes back AT and enters this pattern, and this moment, AT only monitored the control channel of AN at assigned timeslot, and does not monitor at other time slot and any channel of AN to be in battery saving mode, with saving power;

Continuous listen mode: after AT initiates to insert class message, slotted mode finishes, and then can be in this pattern for some time, the control channel of AT continuous monitoring this moment AN, finish or timer expiry up to inserting the class Message Processing, AT enters connection status or idle condition afterwards.

In both cases, will connect between AN and the AT: a kind of is initiatively to initiate the request of connecting to AN by AT, and then the mode that connects; Another kind is when AT is in slotted mode or Suspend Mode and AN and has data to be handed down to AT, and AN initiates the request of connecting to AT.For the latter, according to the difference of AT pattern of living in, AN and the AT following two kinds of implementations that connected:

Mode one, AT is in slotted mode, and concrete steps are as follows:

Step 101:AN need connect with AT, AN at assigned timeslot to the AT issuing page message.

Assigned timeslot refers to the time slot that AT monitors the AN control channel, and this time slot can calculate according to time slot algorithm, and this time slot algorithm is that AN and AT are common.When assigned timeslot arrived, AN was with regard to issuing page message.

Step 102:AT enters assigned timeslot, monitor the beep-page message that AN issues after, send connection request message to AN.

Step 103:AN receives the connection request message of AT, begins the Resources allocation to AT.

In CDMA EV-DO network, AN will connect with AT, and AN must distribute and comprise the link circuit resource of eating dishes without rice or wine, terrestrial links resource etc. to corresponding AT, and the process of Resources allocation is absolutely necessary.

Step 104:AN distributes resource, issues channel assignment message to AT.

Step 105:AT receives this channel assignment information and captures the channel of assignment, finishes message to the assignment of AN transmitting channel, and AN receives this message, connects to set up.

This method that under slotted mode, connects, AN will wait until when assigned timeslot arrives always could issuing page message, beep-page message and connection request message alternately and processing procedure, prolonged the time that connects.Simultaneously, AN need also send beep-page message and receive connection request message, and it is corresponding with it that these message processing procedures need timer resource, session control block state transition etc., has increased the processing load of system.

Time that connects for minimizing and the processing of mitigation system load, when AT is in Suspend Mode, AN can utilize quick connected mode and AT to connect, connect fast and be meant when AN will connect with AT, if AT is in Suspend Mode, then save the process that AN issuing page message and AT send connection request message, and directly enter the essence step that connects: Resources allocation.

Therefore, mode two: when AT was in Suspend Mode, the concrete steps that AN and AT connect were as follows:

Step 1:AN need connect with AT, and judges that current AT is in Suspend Mode, and AN directly begins the Resources allocation to AT.

If current time was in the AT Suspend Mode before the finish time, AN is in Suspend Mode with regard to decidable AT.When Suspend Mode can be finished by connection status the finish time, AT carried to the connection end that AN sends.

Step 2:AN distributes resource, issues channel assignment message to AT.

Step 3:AT receives channel assignment message and captures the channel of assignment, finishes message to the assignment of AN transmitting channel, and AN receives this message, connects to set up.

Because resource allocation process must expend the regular hour, if when resource allocation is finished, AT finishes Suspend Mode and has entered slotted mode, causes quick connection failure thereby can make AT can not receive the channel assignment message that AN issues like this, and AN can not in time be handed down to AT with data as a result.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of Access Network and the method that accesses terminal and connect, to improve Access Network and the success rate that accesses terminal and connect under the Suspend Mode.

For achieving the above object, technical scheme of the present invention is achieved in that

The method that a kind of AN and AT connect, this method comprises:

A, AN judge whether AT can receive the channel assignment message of AN before Suspend Mode finishes, if, execution in step C, otherwise, execution in step B;

B, AN be to the AT issuing page message, after receiving the connection request message of AT, and execution in step C;

C, AN give the AT Resources allocation, and for this AT allocated channel and to AT transmitting channel assignment message, AT receives channel assignment message, and captures the channel of AN assignment, connect and set up.

The described AN of steps A judges that whether AT can receive the channel assignment message of AN before Suspend Mode finishes, realize by following steps:

AN judges that the current moment of living in adds that moment of obtaining after the preset time delay is whether at the AT Suspend Mode before the finish time, if judge that AT can receive the channel assignment message of AN before Suspend Mode finishes; Otherwise, judge that AT can not receive the channel assignment message of AN before Suspend Mode finishes.

The resource allocation time that the described preset time delay of steps A disposes during for the network planning.

The described preset time delay of steps A is averaged for when connecting in the past Resources allocation required time and is obtained.

Comprise further before the described steps A that the AT that finishes connection status sends to AN and carries the Suspend Mode connection end of the finish time, and,

The described Suspend Mode of steps A is that described AT carries to the connection end that AN sends the finish time.

The described AT of step C captures after the channel of AN assignment, further comprises, AT finishes message to the assignment of AN transmitting channel.

Compared with prior art, when method provided by the present invention need be connected with AT at AN, by judging whether AT can receive the channel assignment message of AN before Suspend Mode finishes, if, AN just directly begins the Resources allocation to AT, when having avoided under quick connected mode issuing channel assignment message because of AN, AT is in slotted mode and makes AT can not receive this message, thereby cause the generation of quick connection failure situation, improved the success rate that AN and AT connect under the Suspend Mode, made AN in time to give AT data distributing.

Description of drawings

When Fig. 1 is in slotted mode for AT in the prior art, the flow chart that AN and AT connect;

Fig. 2 is the flow chart that utilizes method AN provided by the invention and AT to connect.

Embodiment

Core concept of the present invention is: when AN need connect with AT, AN judged at first whether AT can receive the channel assignment message of AN before Suspend Mode finishes, if just directly begin the Resources allocation to AT; Otherwise AN sends beep-page message to AT, begins the Resources allocation to AT again after receiving the connection request of AT by the time.

The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.

Fig. 2 is the flow chart that AN provided by the invention and AT connect, and as shown in Figure 2, concrete steps are as follows:

Step 201:AN need connect with AT.

Whether step 202:AN judgement AT before Suspend Mode finishes can receive the channel assignment message of AN, if, execution in step 206; Otherwise, execution in step 203.

AN judges that whether before Suspend Mode finishes AT can receive the channel assignment message of AN, can realize in the following manner: AN judges that the current moment of living in adds that the resulting moment of preset time delay is whether at the AT Suspend Mode before the finish time.

Preset time delay refers to the AN that is obtained by experience or statistics and issues channel assignment to the time that AT experienced from the connection request of receiving AT to AN, is actually the time that AN is spent for the AT Resources allocation.

AN can obtain preset time delay by two kinds of approach:

Approach one, when the network planning, system can dispose a resource allocation time, AN can be with it as preset time delay.

The time that Resources allocation was spent when approach two, AN connected before can adding up at every turn, all time is averaged, should average time as preset time delay.

Comprise Resources allocation and two processes of transmitting channel assignment message though set up to connect fast, shared time of transmitting channel assignment message is very little, can ignore.

Here, AN preserves the Suspend Mode finish time of AT in advance, and this is to be carried to the connection end that AN sends by AT constantly.

Step 203:AN is to the AT issuing page message.

Step 204:AT enters assigned timeslot, monitors beep-page message, sends connection request message to AN.

Step 205:AN receives the connection request message of AT.

Receive the connection request message of AT as AN after, AT just enters continuous listen mode, the control channel of beginning continuous monitoring AN.

Step 206:AN begins the Resources allocation to AT.

Step 207:AN distributes resource, issues channel assignment message to AT.

Step 208:AT receives channel assignment message and captures the channel of assignment, finishes message for the assignment of AN transmitting channel, and AN receives this message, connects to set up.

The above only is process of the present invention and method embodiment, in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method that connects of Access Network AN and access terminal AT is characterized in that this method comprises:

C, AN give the AT Resources allocation, receive channel assignment message for this AT allocated channel and to AT transmitting channel assignment message AT, and capture the channel of AN assignment, connect and set up.

2. the method for claim 1 is characterized in that, the described AN of steps A judges that whether AT can receive the channel assignment message of AN before Suspend Mode finishes, realize by following steps:

3. method as claimed in claim 2 is characterized in that, the resource allocation time that the described preset time delay of steps A disposes during for the network planning.

4. method as claimed in claim 2 is characterized in that, the described preset time delay of steps A is averaged for when connecting in the past Resources allocation required time and obtained.

5. method as claimed in claim 2 is characterized in that, further comprises before the described steps A, and the AT that finishes connection status sends to AN and carries the Suspend Mode connection end of the finish time, and,

6. the method for claim 1 is characterized in that, the described AT of step C captures after the channel of AN assignment, further comprises, AT finishes message to the assignment of AN transmitting channel.