CN101146347A - A method, system, access network and access terminal for reducing paging loss - Google Patents

Abstract

The invention discloses a method for reducing paging loss. The method includes: when an access network AN initiates a connection close to an access terminal AT, the AN and the AT negotiate a temporary time, and enter a time slot mode according to the negotiated temporary time. The invention also provides a system for reducing paging loss, including: AT, and AN including a temporary time negotiation module and a time slot mode control module. In addition, the invention also provides an access network and an access terminal. The invention can effectively reduce the problem of paging loss caused by the out-of-synchronization of sleep and wake-up of AN and AT.

Description

A method, system, access network and access terminal for reducing paging loss

technical field

The present invention relates to wireless communication technology, in particular to a method, system, access network and access terminal for reducing paging loss.

Background technique

In the wireless communication system, the wireless link between the access terminal (Access Terminal, AT) and the access network (AccessNetwork, AN) is mainly divided into the following states: initialization state, idle state and connection state. The initialization state refers to the process of capturing the network and synchronously accessing the network after the AT is turned on; the connection state refers to the open connection between the AT and the AN, which can send and receive forward and reverse data packets; the idle state refers to the AT after synchronizing on the network, establishing The state before the connection, in which the AN sends a paging message to the AT, and the AT monitors control channel messages and paging, etc., to prepare for the establishment of a service connection that may be initiated at any time.

The AT in the idle state generally has the following working modes:

1. In the continuous monitoring mode, the AT continuously monitors the control channel messages. In this mode, the AN can send paging to the AT, and the AT monitors the paging and responds to the paging.

2. In the Suspended mode, the AT continuously monitors the control channel messages for a period of time, and then switches to the slotted mode. This mode generally occurs when the connection is closed and enters the idle state. It is triggered by the connection close message (ConnectionClose) sent by AT. AN and AT enter the slot mode according to the temporary time (SuspendTime) carried in the message, that is, enter at the time indicated by SuspendTime. slotted mode. In temporary mode, AN can send paging, AT can listen to and respond to paging, this mode is a temporary mode before finally entering slotted mode, and the working method is basically the same as continuous listening mode.

3. Time slot mode. In this mode, certain conditions are met. AT and AN will enter the sleep state at the same time, and wake up at the same time in a specific superframe according to the corresponding algorithm after a certain period of sleep, and periodically sleep and wake up The state transition between them, until the AT initiates a call or the AT responds to the paging, the sleep and wake-up modes are not interrupted. In the wake-up state, if the AN has a paging from the AT, the AN sends a paging, and the AT monitors the paging; if the AN does not have a paging from the AT, the AT monitors the control channel message.

When AT works in slotted mode, it only listens to paging when it wakes up, so it is very important to synchronize the sleeping and waking up of AT and AN, so as to avoid the situation that AT is sleeping when AN wakes up and sends paging. Paging will be lost. In many systems, the sleep period of AT and AN is constant. In this case, the synchronization of AT and AN entering sleep is easy to control; but in some systems, the sleep period (Period) of AT and AN is It is variable, and generally becomes longer gradually. In this case, if the time of entering sleep and waking up of AT and AN is not synchronized, paging loss may occur.

In slotted mode, the wake-up slot T satisfies:

[T+256×R]mod Period=Offset,

In all T time slots, both AT and AN will wake up, if there is a paging, AN will send a paging, and AT will monitor the paging. For convenience of description, the formula satisfied by the above T is referred to as Formula 1 herein.

Wherein, R is a fixed value; Offset is the Offset field of the control channel Header of the first synchronous packet (SC) of the control channel media access control (MAC) layer, the length is 2bit, and the value range is 0-3. Each sector has one, once it is set, it will generally not change. AT will know the value of Offset by reading the SC message; Period is a parameter in the configuration attribute. Different Periods are selected according to the absolute time of different systems, and the value of Period is determined by the corresponding The value of the SlotCycle is determined, there are mainly three: the first sleep cycle Period1, the second sleep cycle Period2 and the third sleep cycle Period3. The specific value of Period is as follows:

$\mathrm{<span\; class="notranslate">\; Period</span>}<span\; class="notranslate">\; =</span>\left\{\begin{array}{cc}\mathrm{<span\; class="notranslate">\; Period</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}\\ \mathrm{<span\; class="notranslate">\; Period</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; ,</span>& {\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; 12</span>}}<span\; class="notranslate">\; \&le;</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; three</span>}}<span\; class="notranslate">\; ,</span>\\ \mathrm{<span\; class="notranslate">\; Period</span>}\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; ,</span>& \mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; \&Greater\; Equal;</span>{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; twenty\; three</span>}}\end{array}\right.$

That is to say, when t is less than _T12 , use Period1 as Period to substitute into formula 1 to calculate wake-up time slot T, that is, calculate wake-up time slot T according to Period1; when t is greater than or equal to _T12 and less than _T23 , use Period2 as Period to substitute into formula 1 Calculate the wake-up time slot T; when t is greater than or equal to T ₂₃ , use Period3 as Period and substitute it into Formula 1 to calculate the wake-up time slot T.

Among them, t represents the absolute time of the system, and _T12 and _T23 are two reference times calculated according to the current system time T _C , which are respectively called the first reference time and the second reference time, and the specific values are as follows:

T ₁₂ ＝T _C +Period1-[(T _C +256×R)modPeriod1]+Period1×[24×(WakeCount1+1)-1]

T ₂₃ ＝T ₁₂ +Period2-[(T ₁₂ +256×R)modPeriod2]+Period2×[24×(WakeCount2+1)-1].

Among them, WakeCount1 and WakeCount2 are parameters in the configuration properties.

It can be seen from formula 1 that for a specific user located in a certain cell, that is, when the Offset is fixed and R is determined, all the wake-up moments are basically determined, and then cooperate with the specific T ₁₂ and T ₂₃ , All wake-up time slots are determined. It can be seen that the synchronization of AT and AN on the calculation of T ₁₂ and T ₂₃ will affect the synchronization of AT and AN entering sleep and waking up. From the calculation formulas of T ₁₂ and T ₂₃ , it can be known that T ₁₂ and T ₂₃ are mainly affected by Tc, while T _C is mainly triggered by some primitives.

For example, refer to the schematic diagram of the primitive triggering of AT and AN by the connection close message ConnectionClose initiated by AN shown in Figure 1. The release of AT's connection closed (ConnectionClosed) indication and AN's ConnectionClosed indication is driven by the ConnectionClose message sent by AT . After the AN sends the ConnectionClose message to the AT, it will trigger a timer T _CSPClose that monitors the AT response for 1.5 seconds, and waits for the AT to return the ConnectionClose message before the timer expires. If the timer expires and has not received the AT response, AN issues a ConnectionClosed instruction and automatically enters an idle state.

The ConnectionClose message format is shown in Table 1, including 8-bit message ID (MessageID), 3-bit close reason (CloseReason), 1-bit temporary enable (SuspendEnable), 0 or 36-bit temporary time (SuspendTime) and optional Variable length reserved field. Among them, the value of the CloseReason field has various forms, and various values represent different meanings, for example, 001 represents a close response (Close Reply), 010 represents a connection error (Connection Error), etc.

For the connection close initiated by AN, AN sends a ConnectionClose message to AT, and sets the CloseReason field to other allowable reason values except "001 Close Reply" according to the specific situation; the SuspendEnable field is set to 0; at this time, the SuspendTime field is invalid. The CloseReason field of the ConnectionClose message that the AT responds to the AN is set to "001 CloseReply"; the SuspendEnable field is set to 1; the SuspendTime field is set to 0 or 36-bit absolute time according to the value of the CloseReason field, and the value unit is 80ms.

field length (bits) Message ID (MessageID) 8 Close reason (CloseReason) 3 Temporarily enable (SuspendEnable) 1 Temporary time (SuspendTime) 0 or 36 Reserved variable

Table 1

When the AT issues the ConnectionClosed indication, the AT will calculate T ₁₂ and T ₂₃ according to the current system time T _C ; when the AN issues the ConnectionClosed indication, the AN will calculate T ₁₂ and T ₂₃ according to the current system time T _C. If the ConnectionClose message initiated by the AN can reach the AT normally, and the ConnectionClose message responded by the AT can reach the AN normally, it is considered that the AT and the AN can enter the sleep and wake-up states simultaneously.

However, if the AT does not receive the ConnectionClose message initiated by the AN due to the deterioration of the channel quality of the wireless link or other reasons, the AN enters the idle state after monitoring the timer for the AT’s response to the ConnectionClose message to expire, and the AT monitors the forward traffic If the channel (ForwardTraffic Channel, FTC) timer expires and then enters the idle state, the AN will trigger the calculation of T ₁₂ and T ₂₃ earlier than the AT. As shown in Figure 2, when AN triggers the calculation of T ₁₂ and T ₂₃ earlier than AT, and the sleep and wake-up of AN and AT cannot be synchronized, if AT enters the slot mode earlier than AN, then it is likely that AN is in A situation where the AT is sleeping when a page is sent, causing the AT to lose the page.

Contents of the invention

In view of this, the object of the present invention is to provide a method, system, access network and access terminal for reducing paging loss, and reduce paging loss when the sleep and wakeup of AN and AT cannot be synchronized.

In order to achieve the above object, the method for reducing paging loss provided by the present invention is as follows:

When the access network AN initiates a connection close to the access terminal AT, the AN and the AT negotiate a temporary time, and enter the slot mode according to the negotiated temporary time.

Among them, the negotiation includes:

The AN sends a connection close ConnectionClose message to the AT, and sets the temporary enable field in the ConnectionClose message to 1, and sets a temporary time.

The temporary time is an absolute time that is less than the sum of the time when the AN sends the ConnectionClose message to the AT and the duration of the timer that the AT monitors the forward traffic channel.

Add the value X in the closing reason field of the ConnectionClose message, indicating that the AT responds to the ConnectionClose message of the AN and accepts the temporary time set by the AN. The method further includes:

After receiving the ConnectionClose message sent by the AN, the AT returns a ConnectionClose message to the AN, and sets the closing reason field in the returned ConnectionClose message to X.

The AN and AT entering the slotted mode according to the negotiated temporary time include:

The AN enters the slotted mode according to the temporary time set by itself; the AT enters the slotted mode according to the temporary time carried in the received ConnectionClose message sent by the AN.

The X does not coincide with the existing value in the reason field for closing.

The method further includes:

After receiving the ConnectionClose message sent by the AN, the AT returns the ConnectionClose message to the AN, sets the closing reason field in the returned ConnectionClose message to 001, sets the temporary enable field to 1, and resets the temporary time.

When AN receives the ConnectionClose message returned by AT,

The AN and AT entering the slotted mode according to the negotiated temporary time include: the AN enters the slotted mode according to the temporary time carried in the received ConnectionClose message sent by the AT; the AT enters the slotted mode according to the temporary time set by itself.

When AN does not receive the ConnectionClose message returned by AT,

The AN and AT entering the slotted mode according to the negotiated temporary time includes: the AN enters the slotted mode according to the temporary time set by itself; the AT enters the slotted mode according to the temporary time set by itself.

The temporary time set by the AT is greater than the temporary time set by the AN.

The present invention also provides a system for reducing paging loss, the system includes: access network AN and access terminal AT, AN includes a temporary time negotiation module and a time slot mode control module, wherein,

The AN temporary time negotiation module is used to send a temporary time negotiation request to the AT when the AN initiates connection closure, negotiate the temporary time with the AT, and send the negotiated temporary time to the AN slot mode control module;

The AN time slot mode control module is used to receive the temporary time from the AN temporary time negotiation module, and control the AN to enter the time slot mode according to the received temporary time.

Wherein, the AT includes a temporary time negotiation module and a slotted mode control module,

The AT temporary time negotiation module is used to receive a temporary time negotiation request from the AN, determine the temporary time, return a temporary time negotiation response to the AN, and send the negotiated temporary time to the AT slot mode control module;

The AT slotted mode control module is used to receive the temporary time from the AT temporary time negotiation module, and control the AT to enter the slotted mode according to the received temporary time;

The AN temporary time negotiation module is further configured to receive a temporary time negotiation response from the AT temporary time negotiation module.

In addition, the present invention also provides an access network, the access network AN includes: a temporary time negotiation module and a time slot mode control module, wherein,

The temporary time negotiation module is used to send a temporary time negotiation request to the AT when the AN initiates connection closure, negotiate the temporary time with the AT, and send the negotiated temporary time to the slotted mode control module;

The slotted mode control module is used to receive the temporary time from the temporary time negotiation module, and control the AN to enter the slotted mode according to the received temporary time.

The present invention also provides an access terminal, the access terminal AT includes: a temporary time negotiation module and a time slot mode control module, wherein,

The temporary time negotiation module is used to receive the temporary time negotiation request from the AN, determine the temporary time, return the temporary time negotiation response to the AN, and send the negotiated temporary time to the slotted mode control module;

The slotted mode control module is configured to receive the temporary time from the temporary time negotiation module, and control the AT to enter the slotted mode according to the received temporary time.

It can be seen that, in the present invention, when the AN initiates a connection close to the AT, the AN and the AT will negotiate a temporary time, and enter the time slot mode according to the negotiated temporary time. In this way, when the AN triggers the calculation of _T12 and _T23 earlier than the AT, When the sleep and wake-up of AN and AT cannot be synchronized, it can be guaranteed that AT will not enter the slot mode before AN, thereby avoiding the situation that AT is sleeping when AN sends paging, and reducing the situation of AT losing paging happened.

Description of drawings

FIG. 1 is a schematic diagram of primitive triggering of AT and AN by a connection close message initiated by AN.

Fig. 2 is a schematic diagram of sleep and wake-up of AN and AT when AN is triggered earlier than AT.

Fig. 3 is a schematic diagram of a negotiation process between an AT and an AN in an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a system for reducing paging loss in the present invention.

FIG. 5 is a schematic structural diagram of a system for reducing paging loss in an embodiment of the present invention.

Detailed ways

The basic idea of the method for reducing paging loss provided by the present invention is: when the AN initiates a connection close to the AT, the AN and the AT negotiate the temporary time SuspendTime, and enter the time slot mode according to the negotiated temporary time.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Referring to Fig. 3, the negotiation process between AT and AN in this embodiment mainly includes the following steps:

Step 301: AN initiates a connection close, sends a ConnectionClose message to AT, and AN sets the SuspendEnable field in the ConnectionClose message to 1, and sets the SuspendTime field to an actual time according to specific circumstances.

For example, in order to avoid the loss of the ConnectionClose message sent by the AN to the AT, the AN can set the SuspendTime field to an absolute time that is less than the sum of the time when the AN sends the ConnectionClose message to the AT and the duration of the FTC timer monitored by the AT. In this way, even if the ConnectionClose message sent by AN to AT is lost, AN first enters the idle state after the timer monitoring AT’s response to the ConnectionClose message expires, and AT enters the idle state after the timer monitoring FTC expires, and AN triggers the calculation earlier than AT T ₁₂ and T ₂₃ , then, since the SuspendTime set by AN is smaller than the sum of the time when AN sends the ConnectionClose message to AT and the timer duration of AT monitoring FTC, AN must enter the slot mode before AT, so It will not happen that the AT is dormant while the AN is sending paging, thus avoiding paging loss.

Step 302: After receiving the ConnectionClose message from the AN, the AT returns the ConnectionClose message to the AN.

Here, a value X can be added to the CloseReason field of the ConnectionClose message to indicate that the AT responds to the ConnectionClose message of the AN and accepts the SuspendTime set by the AN, such as X=110, as long as it does not coincide with the existing value in the CloseReason field. Can.

After AT receives the ConnectionClose message carrying SuspendTime sent by AN, it can decide whether to accept the SuspendTime set by AN according to the actual situation. If it accepts, it will set the CloseReason field in the ConnectionClose message returned to AN to X, and there is no need to reset it Suspend Time. Then, AT will enter the slotted mode according to the SuspendTime carried in the ConnectionClose message sent by the received AN, that is, enter the slotted mode at the time indicated by SuspendTime, and the AN will also enter the slotted mode according to the SuspendTime set by itself. In this way, even if the ConnectionClose message sent by the AT to the AN is lost, the AT and the AN can still enter the slotted mode at the same time, that is, the AT will not lose paging.

If the AT does not accept the SuspendTime set by the AN, it sets the CloseReason field in the ConnectionClose message returned to the AN to 001, sets the SuspendEnable field to 1, and sets the SuspendTime to its desired time. Then, the AT enters the slotted mode according to the SuspendTime set by itself, and if the AN receives the ConnectionClose message returned by the AT, it enters the slotted mode according to the SuspendTime carried in the ConnectionClose message sent by the received AT; ConnectionClose message, it still enters the slotted mode according to the SuspendTime originally set by itself.

For the situation that AN receives the ConnectionClose message returned by AT, AT and AN can of course enter the slotted mode at the same time, and paging will not be lost; and for the situation that AN does not receive the ConnectionClose message returned by AT, in order to avoid that AT is ahead of AN For the paging loss problem caused by entering the slotted mode, AT can set the SuspendTime sent to AN to a certain time greater than the SuspendTime set by AN, so that even if AN does not receive the ConnectionClose message returned by AT, AN will be faster than AT Enter slotted mode first to avoid paging loss.

Corresponding to the method provided by the present invention, the present invention also provides a system for reducing paging loss, as shown in Figure 4, the system includes: AT, and an AN including a temporary time negotiation module and a slotted mode control module, wherein, The AN temporary time negotiation module is used to send a temporary time negotiation request to the AT when the AN initiates connection closure, negotiate the temporary time with the AT, and send the negotiated temporary time to the AN time slot mode control module; the AN time slot mode control module, It is used to receive the temporary time from the AN temporary time negotiation module, and control the AN to enter the slot mode according to the received temporary time.

Wherein, the temporary time negotiation request may be the ConnectionClose message mentioned in step 301, which is sent to the AT by the AN temporary time negotiation module. When the AT accepts the SuspendTime set by the AN, or when the AN does not receive the response from the AT, the AN temporary time negotiation module sends the SuspendTime set by itself to the AN slot mode control module; when the AN receives the SuspendTime reset by the AT, the AN temporarily The time negotiation module sends the received SuspendTime reset by the AT to the AN slot mode control module.

In addition, as shown in FIG. 5, the AT in the system may further include a temporary time negotiation module and a slotted mode control module, wherein the AT temporary time negotiation module is configured to receive a temporary time negotiation request from the AN to determine the temporary time, Return the temporary time negotiation response to AN, and send the temporary time negotiated to the AT slotted mode control module; the AT slotted mode control module is used to receive the temporary time from the AT temporary time negotiation module, and according to the received temporary time Control the AT to enter slotted mode. At this time, the AN temporary time negotiation module is further configured to receive a temporary time negotiation response from the AT temporary time negotiation module.

If AT accepts the SuspendTime that AN is provided with, AT temporary time negotiation module then returns to AN temporary time negotiation module the temporary time negotiation response (the value of the ConnectionClose message of X that the CloseReason field value as described in step 302 is accepted) to AN temporary time negotiation module, and AN The SuspendTime that is set sends to AT time slot mode control module; If AT does not accept the SuspendTime that AN sets, then AT resets SuspendTime, returns to the temporary time negotiation response (as described in step 302) that carries reset SuspendTime to AN temporary time negotiation module The value of the CloseReason field of the ConnectionClose message is 001), and the reset SuspendTime is sent to the AT slotted mode control module.

The present invention also provides an access network AN, the specific structure of which is the same as the AN in Figure 4, including: a temporary time negotiation module and a time slot mode control module, wherein the temporary time negotiation module is used for when the AN initiates a connection close Send a temporary time negotiation request to the AT, negotiate the temporary time with the AT, and send the temporary time of negotiation to the slotted mode control module; the slotted mode control module is used to receive the temporary time from the temporary time negotiation module, and according to the received The temporal timing of the control AN into slotted mode.

In addition, the present invention also provides an access terminal AT, the specific structure of which is the same as the AT in Figure 5, including: a temporary time negotiation module and a time slot mode control module, wherein the temporary time negotiation module is used to receive The temporary time negotiation request determines the temporary time, returns the temporary time negotiation response to the AN, and sends the negotiated temporary time to the slotted mode control module; the slotted mode control module is used to receive the temporary time from the temporary time negotiation module, and Control the AT to enter slotted mode according to the received ephemeral time.

It can be seen that the method provided by the present invention can effectively reduce the paging loss problem caused by the out-of-sync sleep and wake-up of AN and AT.

The purpose, technical solutions and beneficial effects of the present invention have been further described in detail above. It should be understood that the above description is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. shall be included in the protection scope of the present invention.

Claims (14)

1. A method for reducing paging loss, characterized in that the method comprises: when the access network AN initiates a connection close to the access terminal AT, AN and AT negotiate a temporary time, and enter a time slot according to the negotiated temporary time model. 2. The method according to claim 1, wherein the negotiation comprises: The AN sends a connection close ConnectionClose message to the AT, and sets the temporary enable field in the ConnectionClose message to 1, and sets a temporary time. 3. The method according to claim 2, wherein the temporary time is an absolute time less than the sum of the time when the AN sends the ConnectionClose message to the AT and the duration of the timer for the AT to monitor the forward traffic channel. 4. The method according to claim 2, wherein the value X is added to the reason field of the ConnectionClose message to indicate that the AT responds to the ConnectionClose message of the AN and accepts the temporary time set by the AN, the method further comprising: After receiving the ConnectionClose message sent by the AN, the AT returns a ConnectionClose message to the AN, and sets the closing reason field in the returned ConnectionClose message to X. 5. The method according to claim 4, wherein said AN and AT entering the slotted mode according to the negotiated temporary time comprises: The AN enters the slotted mode according to the temporary time set by itself; the AT enters the slotted mode according to the temporary time carried in the received ConnectionClose message sent by the AN. 6 . The method according to claim 4 , wherein the X does not coincide with an existing value in the shutdown reason field. 7 . 7. The method according to claim 2, characterized in that the method further comprises: After receiving the ConnectionClose message sent by the AN, the AT returns the ConnectionClose message to the AN, sets the closing reason field in the returned ConnectionClose message to 001, sets the temporary enable field to 1, and resets the temporary time. 8. the method according to claim 7 is characterized in that, when AN receives the ConnectionClose message that AT returns, The AN and AT entering the slotted mode according to the negotiated temporary time include: the AN enters the slotted mode according to the temporary time carried in the received ConnectionClose message sent by the AT; the AT enters the slotted mode according to the temporary time set by itself. 9. method according to claim 7, is characterized in that, when AN does not receive the ConnectionClose message that AT returns, The AN and AT entering the slotted mode according to the negotiated temporary time includes: the AN enters the slotted mode according to the temporary time set by itself; the AT enters the slotted mode according to the temporary time set by itself. 10. The method according to claim 7, wherein the temporary time set by the AT is greater than the temporary time set by the AN. 11. A system for reducing paging loss, characterized in that the system includes: an access network AN and an access terminal AT, and the AN includes a temporary time negotiation module and a slotted mode control module, wherein, The AN temporary time negotiation module is used to send a temporary time negotiation request to the AT when the AN initiates connection closure, negotiate the temporary time with the AT, and send the negotiated temporary time to the AN slot mode control module; The AN time slot mode control module is used to receive the temporary time from the AN temporary time negotiation module, and control the AN to enter the time slot mode according to the received temporary time. 12. The system according to claim 11, wherein the AT comprises a temporary time negotiation module and a slotted mode control module, wherein, The AT temporary time negotiation module is used to receive a temporary time negotiation request from the AN, determine the temporary time, return a temporary time negotiation response to the AN, and send the negotiated temporary time to the AT slot mode control module; The AT slotted mode control module is used to receive the temporary time from the AT temporary time negotiation module, and control the AT to enter the slotted mode according to the received temporary time; The AN temporary time negotiation module is further configured to receive a temporary time negotiation response from the AT temporary time negotiation module. 13. An access network, characterized in that the access network AN includes: a temporary time negotiation module and a time slot mode control module, wherein, The temporary time negotiation module is used to send a temporary time negotiation request to the AT when the AN initiates connection closure, negotiate the temporary time with the AT, and send the negotiated temporary time to the slotted mode control module; The slotted mode control module is used to receive the temporary time from the temporary time negotiation module, and control the AN to enter the slotted mode according to the received temporary time. 14. An access terminal, characterized in that the access terminal AT comprises: a temporary time negotiation module and a slot mode control module, wherein, The temporary time negotiation module is used to receive the temporary time negotiation request from the AN, determine the temporary time, return the temporary time negotiation response to the AN, and send the negotiated temporary time to the slotted mode control module; The slotted mode control module is configured to receive the temporary time from the temporary time negotiation module, and control the AT to enter the slotted mode according to the received temporary time.

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