CN102790998B - Network side device and AM (amplitude modulation) service data buffer method of network side device - Google Patents

Abstract

The invention discloses a network side device and an AM (amplitude modulation) service data buffer method of the network side device. The method comprises the following steps that when a PDCP (packet data convergence protocol) layer receives AM service data packets, and the current buffer queue does not reach the full data memory, the data packets are buffered to the vacant position of the buffer queue, and otherwise, the data packets are buffered to the position of the stored data packets in the buffer queue according to the preset mechanism, wherein the PDCP layer regularly regulates the buffer queue length according to the UE (user equipment) signal channel quality, the position information and the AM down service flow; the PDCP layer releases the data packets successfully sent to UE in the buffer queue according to the notification of a RLC (radio link control) layer; and the PDCP layer releases the overtime data packets according to the buffer duration in the data packets. The device and the method disclosed by the invention have the advantages that on the premise of not influencing the system performance, the unmeaning memory is avoided as much as possible, and the memory utilization rate and the system efficiency are improved.

Description

A kind of method of network side apparatus and buffer memory AM business datum thereof

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of method of network side apparatus and buffer memory AM business datum thereof.

Background technology

LTE(Long Term Evolution, Long Term Evolution) agreement regulation PDCP(Packet Data Convergence Protocol, packet data convergence protocol) layer entity is when re-establishing, PDCP layer needs " is not confirmed by bottom the PDCP SDU(Service Data Unit that success sends from first, Service Data Unit) start, the PDCP SDU of the PDCP SN associated is resend according to counting CONUT value ascending order ", agreement defines the time span abandoning timer discard Timer simultaneously, decide when to abandon the PDCP SDU be not always successfully sent.

In order to realize protocol requirement, following requirement to be had to base station:

1) PDCP layer is opened up buffer memory buffer to preserve and is confirmed without bottom the PDCP SDU that success sends;

2) unlatching abandons timer to set the PDCP SDU maximum time length abandoning unsuccessful transmission, when a timeout occurs, PDCP layer abandons overtime PDCP SDU data in buffering buffer, and notify RLC(Radio Link Control, wireless spread-spectrum technology) layer, abandon and do not send data accordingly.

3) by rlc layer ARQ(Automatic Repeat Request, HARQ) mechanism, when receiving ACK, need notify that PDCP entity discharges the corresponding data bag of buffer memory by RLC.

As can be seen from existing realization mechanism, in order to ensure that UE switches and re-establishes scene RLC and be configured to AM(Acknowledged Mode, confirming answer-mode) business datum is not lost under pattern, causes existing implementation to have the following disadvantages:

1) current realization mechanism is for AM pattern, PDCP layer needs to open up buffer memory buffer to preserve the business datum of unofficial success transmission, rlc layer needs preservation essence identical (due to the existence of the compression of PDCP layer head, encryption function according to its retransmission mechanism equally simultaneously, data can be variant) a data, data identical like this store two parts, and such two parts are stored in when non-switching is non-to be re-established and there is no practical significance, increase Installed System Memory expense;

2) timer expiry is abandoned, the unsuccessful packet sent in buffer memory buffer is abandoned according to agreement PDCP layer, need notice rlc layer to abandon corresponding bag simultaneously, think when rlc layer transmitting terminal receives the feedback of receiving terminal and successfully send packet, rlc layer discharges corresponding RLC SDU, and notifies the corresponding PDCP SDU of buffer memory in PDCP layer release buffer memory buffer.To abandon with rlc layer due to PDCP layer or discharge be the identical data of essence, under the scene that traffic carrying capacity is large, PDCP layer and rlc layer all exist and discharge data manipulation frequently, reduce system treatment effeciency.

Summary of the invention

The invention provides a kind of method of network side apparatus and buffer memory AM business datum thereof, not only can meet protocol requirement but also can significant increase systematic function and memory usage.

The invention provides a kind of method of network side buffer memory AM business datum, comprising:

When packet data convergence protocol PDCP layer receives the packet of AM business, if when current cache queue does not reach and is filled with data, by position vacant in described data pack buffer to buffer queue, otherwise by the position at packet place that setting mechanism will store in described data pack buffer to buffer queue, wherein, PDCP layer according to the channel quality of UE, positional information and AM downlink business flow, timing adjustment length of buffer queue; ;

PDCP layer, according to the notice of wireless spread-spectrum technology rlc layer, is successfully sent to the packet of UE in release buffer queue;

PDCP layer, according to the buffer memory duration of packet in buffer queue, discharges timeout datum bag.

The present invention also provides a kind of network side apparatus of buffer memory AM business datum, comprising:

Data buffer storage unit, for when packet data convergence protocol PDCP layer receives the packet of AM business, if when current cache queue does not reach and is filled with data, by position vacant in described data pack buffer to buffer queue, otherwise by the position at packet place that setting mechanism will store in described data pack buffer to buffer queue, wherein, PDCP layer according to the channel quality of UE, positional information and AM downlink business flow, timing adjustment length of buffer queue;

First releasing unit, for by the notice of PDCP layer according to wireless spread-spectrum technology rlc layer, is successfully sent to the packet of UE in release buffer queue;

Second releasing unit, for by the buffer memory duration of PDCP layer according to packet in buffer queue, discharges timeout datum bag.

Utilize the method for network side apparatus provided by the invention and buffer memory AM business datum thereof, there is following beneficial effect: adjust buffer queue data storage depth in real time according to UE channel quality, positional information and AM data traffic, not only can meet protocol requirement but also can significant increase systematic function and memory usage.

Accompanying drawing explanation

Fig. 1 is network side buffer memory AM business datum method flow diagram in the embodiment of the present invention;

Fig. 2 is the network side apparatus structure chart of buffer memory AM business datum in the embodiment of the present invention.

Embodiment

Illustrate in greater detail below in conjunction with the method for drawings and Examples to network side apparatus provided by the invention and buffer memory AM business datum thereof.

In LTE system, when UE switches and re-establish, PDCP layer can carry out PDCP volume reconstruction and stand, be the business packet of AM for RLC pattern configurations, in order to user data under ensureing this condition can not be lost, according to agreement, PDCP entity needs to open up buffer memory in advance and confirms without bottom the business datum that success sends, receive after ACK confirms until RLC and reinform PDCP entity release corresponding data bag, period also can abandon overtime packet after timer expiry.

Specifying that the size of PDCP layer receiver window is the half of SN length according to agreement, is 2048, i.e. maximum storage 2048 packets, and the length of buffer queue that PDCP entity is opened up is 2048.

PDCP for other re-establishes scene, then do not need PDCP entity to carry out confirming without bottom the business datum buffer memory that success sends.Mostly be incident owing to switching and re-establishing, the buffer memory pre-stored data causing PDCP to open up 2048 length does not in most instances have practical significance, and therefore prior art wastes limited system memory resource, and reduces systematic function to a certain extent.

The embodiment of the present invention provides a kind of method of network side buffer memory AM business datum, as shown in Figure 1, and the following flow process of PDCP layer executed in parallel by network side:

Flow process 1, i.e. step 100, PDCP layer according to the channel quality of UE, positional information and AM downlink business flow, timing adjustment length of buffer queue;

Flow process 2, specifically comprises: step 101, and PDCP layer receives the packet confirming answer-mode AM business;

Step 102, judges whether current cache queue is filled with data, if so, performs step 103, otherwise perform step 104;

Step 103, by position vacant in described data pack buffer to buffer queue;

Step 104, the position at packet place will stored in described data pack buffer to buffer queue by setting mechanism, preferably, by the position of described data pack buffer to the packet place stored at first, namely according to first in first out storage packet.

Flow process 3, i.e. step 201, PDCP layer, according to the notice of rlc layer, is successfully sent to the packet of UE in release buffer queue;

Flow process 4, i.e. step 301, PDCP layer, according to the buffer memory duration of packet in buffer queue, discharges timeout datum bag.

Particularly, can by PDCP layer DRB AM entity timing adjustment length of buffer queue, the method that the embodiment of the present invention provides, PDCP layer is according to UE channel quality, positional information and AM data traffic feature three factors adjust data storage depth in real time, no longer as prior art, the length of buffer queue is set to the size of PDCP layer receiver window with buffer memory total data, thus avoid in non-switching and under re-establishing scene, the data reduction internal memory that buffer memory is a large amount of, in addition, if the data of PDCP layer buffer memory reduce, that also can reduce between PDCP layer and rlc layer is mutual, thus improve systematic function.

Preferably, PDCP layer timing adjustment length of buffer queue, specifically comprises:

When arriving setting cycle, the channel quality current according to UE and positional information, prejudge UE and switch or the value-at-risk of service reconstruction position scape;

According to statistics setting cycle in AM downlink business flow and value-at-risk, by length of buffer queue 0 and setting maximum L _maxbetween adjust, wherein, value-at-risk is larger, and length of buffer queue is larger.

The embodiment of the present invention is for the business of AM pattern, if determine that the risk switched or service reconstruction is vertical is very little, then, under illustrating that UE is in regular traffic situation, PDCP layer reduces the buffer memory of data, even not data cached.For guarantee UE switching and under re-establishing sight, RLC pattern configurations is that the business packet of AM can not be lost, PDCP layer needs to judge above scene occurrence time in advance, determine that the Hazard ratio switched or service reconstruction is vertical is larger, then illustrate that UE will switch or re-establish sight, therefore length of buffer queue can be strengthened, thus buffered in advance AM business datum.

Preferably, the channel quality of UE comprises uplink signal-channel quality and down channel quality, and described value-at-risk is λ _dlrd _l+λ _ulr _ul+ λ _pp _ue, R _ulfor uplink signal-channel quality early warning value, λ _ulfor uplink signal-channel quality weighted value, R _dlfor down channel quality early warning value, λ _dlfor down channel quality weighted value, P _uefor positional information early warning value, λ _pfor positional information weighted value; R _ulless, the uplink signal-channel quality of UE is better, otherwise poorer, R _dlless, down channel quality is poorer, otherwise larger; P _ueless, the position of UE the closer to center of housing estate, otherwise is got over away from center of housing estate.

Particularly, for each early warning value above-mentioned, the span of early warning value can be set as required, then R _ulless in the span of correspondence, the uplink signal-channel quality of UE is better, otherwise poorer, R _dlless in the span of correspondence, down channel quality is poorer, otherwise larger; P _ueless in the span of correspondence, the position of UE the closer to center of housing estate, otherwise is got over away from center of housing estate.

Each weighted value above-mentioned can set as required, thus represents the influence degree of each early warning value.

Preferably, R _ulminimum value be 0, R _dlminimum value be 0, P _ueminimum value be 0; Be 0 in value-at-risk, or when in setting cycle, AM downlink business flow is less than setting flow value, the length of adjustment buffer queue is 0.Thus make when regular traffic, do not need, at PDCP layer, buffer memory is carried out to data and greatly save internal memory and improve systematic function.

Preferably, by MAC layer to PDCP layer reporting channel quality, notified the positional information of PDCP layer UE by rrc layer, monitor AM downlink business flow by PDCP layer.

Provide the method preferred embodiment of network side buffer memory AM business datum of the present invention below.

Embodiment

1) for base station, be UE allocation position information measurement report condition at rrc layer, UE according to configuration information, when measuring UE to cell edge (as reach adjacent cell signal be better than the conditions such as Serving cell), rrc layer notification message transmission is to PDCP layer, and PDCP entity preserves this notification message.

Certainly, when UE measure enter center of housing estate from cell edge time, rrc layer also to be sent out public notice message to PDCP layer, thus PDCP layer can determine that UE is in center of housing estate or cell edge.

2) MAC layer is to PDCP layer reporting channel quality

The channel quality of UE comprises uplink signal-channel quality and down channel quality, particularly:

A) the MAC layer CQI(Channel Quality Indicator of reflection down channel quality that UE is reported, channel quality indicates) index, notice PDCP layer

UE notifies MAC layer down channel quality by the mode that CQI index reports, and for avoiding shake, report after the smoothing filtering of UE, according to agreement, CQI index is divided into 0-15, as shown in table 1 again:

Table 1

CQI index	Modulation system	Code check x 1024	Efficiency
				0
1	QPSK	78	0.1523
				2	QPSK	120	0.2344
3	QPSK	193	0.3770
				4	QPSK	308	0.6016
5	QPSK	449	0.8770
				6	QPSK	602	1.1758
7	16QAM	378	1.4766
				8	16QAM	490	1.9141
9	16QAM	616	2.4063
				10	64QAM	466	2.7305
11	64QAM	567	3.3223
				12	64QAM	666	3.9023
13	64QAM	772	4.5234
				14	64QAM	873	5.1152
15	64QAM	948	5.5547

According to the span of CQI index in the present embodiment, PDCP layer divides five down channel quality advanced warning grades, down channel quality early warning value R _dlvalue be 0,1,2,3,4, as shown in table 2, when UE reports CQI index to be more than or equal to 13, think that signal is good, R _dlbe 0; When CQI index is 10 ~ 12 time, R _dlbe 1; When CQI index is 7 ~ 9 time, R _dlbe 2; When CQI index is 4 ~ 6 time, R _dlbe 3; When CQI index is less than 3, R _dlbe 4.

Table 2

CQI index	Down channel quality early warning value
		0–3	4
4–6	3
		7–9	2
10–12	1
		13-15	0

B) MAC layer receives physical layer according to SRS Sounding Reference Symbol, visit reference signal) signal to noise ratio that converts, the MCS(Modulation and Coding Scheme of corresponding reflection uplink signal-channel quality is determined according to signal to noise ratio, modulating-coding table) grade, and by MCS grade notice PDCP layer, according to agreement, signal to noise ratio is according to different corresponding 0-28 the MCS grade of value.For avoiding shake, can to the smoothing filtering of MCS grade determined.

According to MCS grade span, PDCP layer divides five uplink signal-channel quality advanced warning grades, uplink signal-channel quality early warning value R _ulvalue be 0,1,2,3,4, as shown in table 3, when the MCS grade that MAC layer evaluates is more than or equal to 20, think that signal is good, R _ulbe 0; When the MCS grade that MAC layer evaluates is 15 ~ 19 time, R _ulbe 1; When the MCS grade that MAC layer evaluates is 10 ~ 14 time, R _ulbe 2; When the up MCS grade that MAC layer evaluates is 5 ~ 9 time, R _ulbe 3; When the up MCS grade that MAC layer evaluates is 5 ~ 9 time, R _ulbe 4.

Table 3

MCS grade	Uplink signal-channel quality advanced warning grade
		0-4	4

5-9	3
		10-14	2
15-19	1
		20-28	0

3) PDCP layer is by setting cycle (the present embodiment is that 1s illustrates with setting cycle) statistics DRB AM downlink business flow, and divides flow grade according to uninterrupted.For statistical service traffic characteristic more accurately, when the cycle reaches, to the smoothing filtering of AM downlink business flow of statistics.

In the present embodiment, according to the maximum amount of data stored in setting cycle, by corresponding for the AM service traffics of different set scope different flow grade, flow grade is higher, and the AM service traffics in corresponding setting range are larger.

Specify that the size of PDCP layer receiver window is the half of SN length according to agreement, be 2048, i.e. maximum storage 2048 packets, suppose that a packet is that 1.5KByte(considers the business such as AM main users FTP, HTTP, packet is larger), then in 1s, maximum storage is about 24Mbits, in the present embodiment, this data volume is divided into 17 grades according to size, the value of service traffics grade is 0,1,2 ... 16, as shown in table 4:

Table 4

The method of the network side buffer memory AM business datum that the embodiment of the present invention provides, when arriving setting cycle, the channel quality current according to UE and positional information, prejudge UE and switch or the value-at-risk of service reconstruction position scape, value-at-risk is λ _dlr _dl+ λ _ulr _ul+ λ _pp _ue, R _ulfor uplink signal-channel quality early warning value, λ _ulfor uplink signal-channel quality weighted value, R _dlfor down channel quality early warning value, λ _dlfor down channel quality weighted value, P _uefor positional information early warning value, λ _pfor positional information weighted value.Specifically can divide according to advanced warning grade above and determine each early warning value.

In the present embodiment, when UE is positioned at and is less than center, P _uebe 0, UE when being positioned at cell edge, P _uebe 1.

According to the AM downlink business flow in the setting cycle of statistics and value-at-risk, by length of buffer queue 0 and L _maxadjust, comprising:

$\stackrel{\‾}{N_{\mathrm{buffer}}}=R_{\mathrm{buffer}}(({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{dl}}+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{ul}}+{\mathrm{\λ}}_p{P}_{\mathrm{ue}})/({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{ul}\max }+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{dl}\max }));$

If be not more than L _max, obtain otherwise N _buffer=L _max/ L;

The length L of adjustment buffer queue _buffer=L × N _buffer;

Wherein, R _bufferfor the flow grade that the AM downlink business flow in the setting cycle of statistics is corresponding, flow grade that specifically can be corresponding according to AM downlink business flow in above-mentioned flow grade dividing mode determination current period, R _{ul max}for the maximum of the uplink signal-channel quality early warning value of setting, namely value is 4, R _{dl max}for the maximum of the down channel quality early warning value of setting, namely value is 4, L is the adjustment granularity set, L _maxbe packet number with L unit.

The above-mentioned maximum L of size mentioning the data cached queue length of PDCP layer _maxbe 2048, data cached for PDCP queue length is divided into 16 grades by the present invention, and adjustment granularity is 128.

In the present embodiment, when PDCP layer is set up AM business for the first time or re-establishes AM business, initialization N _bufferfor L _max/ L, i.e. initialization N _buffer=16, L _buffer=128 × N _buffer.At PDCP entity run duration, often reach setting cycle, upgrade length of buffer queue in a manner described.

Based on same inventive concept, a kind of network side apparatus of buffer memory AM business datum is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this device is similar to a kind of method of buffer memory AM business datum, therefore the enforcement of these equipment see the enforcement of method, can repeat part and repeats no more.

The embodiment of the present invention provides buffer memory to confirm the network side apparatus of answer-mode AM business datum, as shown in Figure 2, comprising:

Data buffer storage unit 201, during for receiving the packet confirming answer-mode AM business at packet data convergence protocol PDCP layer, if when current cache queue does not reach and is filled with data, by position vacant in described data pack buffer to buffer queue, otherwise by the position at packet place that setting mechanism will store in described data pack buffer to buffer queue, wherein, PDCP layer according to the channel quality of UE, positional information and AM downlink business flow, timing adjustment length of buffer queue;

First releasing unit 202, for by the notice of PDCP layer according to rlc layer, is successfully sent to the packet of UE in release buffer queue;

Second releasing unit 203, for by the buffer memory duration of PDCP layer according to packet in buffer queue, discharges timeout datum bag.

Preferably, by PDCP layer timing adjustment length of buffer queue, specifically comprise:

When arriving setting cycle, the channel quality that UE is current and positional information, prejudge UE and switch or the value-at-risk of service reconstruction position scape;

According to statistics setting cycle in AM downlink business flow and value-at-risk, by length of buffer queue 0 and setting maximum L _maxbetween adjust, wherein, value-at-risk is larger, and length of buffer queue is larger.

Preferably, the channel quality of UE comprises uplink signal-channel quality and down channel quality, and described value-at-risk is λ _dlr _dl+ λ _ulr _ul+ λ _pp _ue, R _ulfor uplink signal-channel quality early warning value, λ _ulfor uplink signal-channel quality weighted value, R _dlfor down channel quality early warning value, λ _dlfor down channel quality weighted value, P _uefor positional information early warning value, λ _pfor positional information weighted value;

R _ulless, the uplink signal-channel quality of UE is better, otherwise poorer, R _dlless, down channel quality is poorer, otherwise larger; P _ueless, the position of UE the closer to center of housing estate, otherwise is got over away from center of housing estate.

Preferably, R _ulminimum value be 0, R _dlminimum value be 0, P _ueminimum value be 0;

Be 0 in value-at-risk, or when in setting cycle, AM downlink business flow is less than setting flow value, the length of adjustment buffer queue is 0.

Preferably, according to the AM downlink business flow in the setting cycle of statistics and value-at-risk, by length of buffer queue 0 and L _maxadjust, comprising:

$\stackrel{\‾}{N_{\mathrm{buffer}}}=R_{\mathrm{buffer}}(({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{dl}}+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{ul}}+{\mathrm{\λ}}_p{P}_{\mathrm{ue}})/({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{ul}\max }+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{dl}\max }));$

If be not more than L _max, obtain otherwise N _buffer=L _max/ L;

The length L of adjustment buffer queue _buffer=L × N _buffer;

Wherein, R _bufferfor the flow grade that the AM downlink business flow in the setting cycle of statistics is corresponding, the corresponding different flow grade of AM downlink business flow of different set scope, flow grade is higher, and the AM downlink business flow in corresponding setting range is larger, R _{ul max}for the maximum of the uplink signal-channel quality early warning value of setting, R _{dl max}for the maximum of the down channel quality early warning value of setting, L is the adjustment granularity of setting, L _maxbe packet number with L unit.

Preferably, according to the maximum amount of data stored in setting cycle, the value of service traffics grade is 0,1,2 ... 16;

The adjustment granularity of setting is 128;

According to the channel quality indicator (CQI) index span of reflection down channel quality, R _dlspan be 0,1,2,3,4, according to reflection uplink signal-channel quality modulating-coding table MCS grade span, R _ulspan be 0,1,2,3,4;

When UE is positioned at and is less than center, P _uebe 0, UE when being positioned at cell edge, P _uebe 1.

Preferably, by MAC layer to PDCP layer reporting channel quality, notified the positional information of PDCP layer UE by rrc layer, PDCP layer monitoring AM downlink business flow.

Preferably, the channel quality indicator (CQI) index of the reflection down channel quality that UE reports by MAC layer, notice PDCP layer, receive physical layer according to the signal to noise ratio visiting reference signal SRS conversion, the modulating-coding table MCS grade of corresponding reflection uplink signal-channel quality is determined according to signal to noise ratio, and by MCS grade notice PDCP layer;

RRC receive UE arrive cell edge measurement on give the correct time, send a notification message to PDCP layer.

Preferably, in the embodiment of the present invention, the network side apparatus of buffer memory AM business datum is base station.

The present invention can dynamically judge the business datum buffer memory degree of depth, no longer whole buffer memory for packet, but carry out differentiating and processing according to current business ruuning situation, under the prerequisite of not influential system performance, avoid insignificant storage as much as possible, to improve efficiency and the memory usage of system.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (15)

1. network side buffer memory confirms a method for answer-mode AM business datum, it is characterized in that, comprising:

When packet data convergence protocol PDCP layer receives the packet of AM business, if when current cache queue does not reach and is filled with data, by position vacant in described data pack buffer to buffer queue, otherwise by the position at packet place that setting mechanism will store in described data pack buffer to buffer queue, wherein, when arriving setting cycle, PDCP layer, according to the current channel quality of UE and positional information, is prejudged UE and is switched or the value-at-risk of service reconstruction position scape; PDCP layer according to statistics setting cycle in AM downlink business flow and value-at-risk, by length of buffer queue 0 and setting maximum L _maxbetween adjust, wherein, value-at-risk is larger, and length of buffer queue is larger;

PDCP layer, according to the notice of wireless spread-spectrum technology rlc layer, is successfully sent to the packet of UE in release buffer queue;

PDCP layer, according to the buffer memory duration of packet in buffer queue, discharges timeout datum bag.

2. the method for claim 1, is characterized in that, the channel quality of UE comprises uplink signal-channel quality and down channel quality, and described value-at-risk is λ _dlr _dl+ λ _ulr _ul+ λ _pp _ue, R _ulfor uplink signal-channel quality early warning value, λ _ulfor uplink signal-channel quality weighted value, R _dlfor down channel quality early warning value, λ _dlfor down channel quality weighted value, P _uefor positional information early warning value, λ _pfor positional information weighted value;

R _ulless, the uplink signal-channel quality of UE is better, otherwise poorer, R _dlless, down channel quality is poorer, otherwise larger; P _ueless, the position of UE the closer to center of housing estate, otherwise is got over away from center of housing estate.

3. method as claimed in claim 2, is characterized in that, R _ulminimum value be 0, R _dlminimum value be 0, P _ueminimum value be 0;

Be 0 in value-at-risk, or when in setting cycle, AM downlink business flow is less than setting flow value, the length of adjustment buffer queue is 0.

4. method as claimed in claim 2, is characterized in that, according to the AM downlink business flow in the setting cycle of statistics and value-at-risk, by length of buffer queue 0 and L _maxadjust, comprising:

$\stackrel{\‾}{N_{\mathrm{buffer}}}=R_{\mathrm{buffer}}(({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{dl}}+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{ul}}+{\mathrm{\λ}}_p{P}_{\mathrm{ue}})/({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{ul}}\max +{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{dl}}\max ));$

If be not more than L _max, obtain otherwise N _buffer=L _max/ L;

The length L of adjustment buffer queue _buffer=L × N _buffer;

Wherein, R _bufferfor the flow grade that the AM downlink business flow in the setting cycle of statistics is corresponding, the corresponding different flow grade of AM downlink business flow of different set scope, flow grade is higher, and the AM downlink business flow in corresponding setting range is larger, R _{ul max}for the maximum of the uplink signal-channel quality early warning value of setting, R _{dl max}for the maximum of the down channel quality early warning value of setting, L is the adjustment granularity of setting, L _maxbe packet number with L unit.

5. method as claimed in claim 4, is characterized in that, when PDCP layer is set up AM business for the first time or re-establishes AM business, and initialization N _bufferfor L _max/ L.

6. method as claimed in claim 4, is characterized in that,

According to the maximum amount of data stored in setting cycle, the value of service traffics grade is 0,1,2 ... 16;

The adjustment granularity of setting is 128;

According to the channel quality indicator (CQI) index span of reflection down channel quality, R _dlspan be 0,1,2,3,4, according to reflection uplink signal-channel quality modulating-coding table MCS grade span, R _ulspan be 0,1,2,3,4;

When UE is positioned at and is less than center, P _uebe 0, UE when being positioned at cell edge, P _uebe 1.

7. the method as described in as arbitrary in claim 1 ~ 6, is characterized in that,

By MAC layer to PDCP layer reporting channel quality, notified the positional information of PDCP layer UE by rrc layer, PDCP layer monitoring AM downlink business flow.

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

The channel quality indicator (CQI) index of the reflection down channel quality that UE reports by MAC layer, notice PDCP layer, receive physical layer according to the signal to noise ratio visiting reference signal SRS conversion, the modulating-coding table MCS grade of corresponding reflection uplink signal-channel quality is determined according to signal to noise ratio, and by MCS grade notice PDCP layer;

RRC receive UE arrive cell edge measurement on give the correct time, send a notification message to PDCP layer.

9. buffer memory confirms a network side apparatus for answer-mode AM business datum, it is characterized in that, comprising:

Data buffer storage unit, for when packet data convergence protocol PDCP layer receives the packet of AM business, if when current cache queue does not reach and is filled with data, by position vacant in described data pack buffer to buffer queue, otherwise by the position at packet place that setting mechanism will store in described data pack buffer to buffer queue, wherein, when arriving setting cycle, by PDCP layer according to the current channel quality of UE and positional information, prejudge UE and switch or the value-at-risk of service reconstruction position scape; By PDCP layer according to statistics setting cycle in AM downlink business flow and value-at-risk, by length of buffer queue 0 and setting maximum L _maxbetween adjust, wherein, value-at-risk is larger, and length of buffer queue is larger;

First releasing unit, for by the notice of PDCP layer according to wireless spread-spectrum technology rlc layer, is successfully sent to the packet of UE in release buffer queue;

Second releasing unit, for by the buffer memory duration of PDCP layer according to packet in buffer queue, discharges timeout datum bag.

10. device as claimed in claim 9, it is characterized in that, the channel quality of UE comprises uplink signal-channel quality and down channel quality, and described value-at-risk is λ _dlr _dl+ λ _ulr _ul+ λ _pp _ue, R _ulfor uplink signal-channel quality early warning value, λ _ulfor uplink signal-channel quality weighted value, R _dlfor down channel quality early warning value, λ _dlfor down channel quality weighted value, P _uefor positional information early warning value, λ _pfor positional information weighted value;

R _ulless, the uplink signal-channel quality of UE is better, otherwise poorer, R _dlless, down channel quality is poorer, otherwise larger; P _ueless, the position of UE the closer to center of housing estate, otherwise is got over away from center of housing estate.

11. devices as claimed in claim 10, is characterized in that, R _ulminimum value be 0, R _dlminimum value be 0, P _ueminimum value be 0;

Be 0 in value-at-risk, or when in setting cycle, AM downlink business flow is less than setting flow value, the length of adjustment buffer queue is 0.

12. devices as claimed in claim 10, is characterized in that, according to the AM downlink business flow in the setting cycle of statistics and value-at-risk, by length of buffer queue 0 and L _maxadjust, comprising:

$\stackrel{\‾}{N_{\mathrm{buffer}}}=R_{\mathrm{buffer}}(({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{dl}}+{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{ul}}+{\mathrm{\λ}}_p{P}_{\mathrm{ue}})/({\mathrm{\λ}}_{\mathrm{dl}}{R}_{\mathrm{ul}}\max +{\mathrm{\λ}}_{\mathrm{ul}}{R}_{\mathrm{dl}}\max ));$

If be not more than L _max, obtain otherwise N _buffer=L _max/ L;

The length L of adjustment buffer queue _buffer=L × N _buffer;

Wherein, R _bufferfor the flow grade that the AM downlink business flow in the setting cycle of statistics is corresponding, the corresponding different flow grade of AM downlink business flow of different set scope, flow grade is higher, and the AM downlink business flow in corresponding setting range is larger, R _{ul max}for the maximum of the uplink signal-channel quality early warning value of setting, R _{dl max}for the maximum of the down channel quality early warning value of setting, L is the adjustment granularity of setting, L _maxbe packet number with L unit.

13. devices as claimed in claim 12, is characterized in that, according to the maximum amount of data stored in setting cycle, the value of service traffics grade is 0,1,2 ... 16;

The adjustment granularity of setting is 128;

According to the channel quality indicator (CQI) index span of reflection down channel quality, R _dlspan be 0,1,2,3,4, according to reflection uplink signal-channel quality modulating-coding table MCS grade span, R _ulspan be 0,1,2,3,4;

When UE is positioned at and is less than center, P _uebe 0, UE when being positioned at cell edge, P _uebe 1.

14. as arbitrary in claim 9 ~ 13 as described in device, it is characterized in that,

By MAC layer to PDCP layer reporting channel quality, notified the positional information of PDCP layer UE by rrc layer, PDCP layer monitoring AM downlink business flow.

15. devices as claimed in claim 14, is characterized in that,

The channel quality indicator (CQI) index of the reflection down channel quality that UE reports by MAC layer, notice PDCP layer, receive physical layer according to the signal to noise ratio visiting reference signal SRS conversion, the modulating-coding table MCS grade of corresponding reflection uplink signal-channel quality is determined according to signal to noise ratio, and by MCS grade notice PDCP layer;

RRC receive UE arrive cell edge measurement on give the correct time, send a notification message to PDCP layer.