CN101527927A - Data receiving method and data receiving device for radio link control layer in long time evolution system - Google Patents
Data receiving method and data receiving device for radio link control layer in long time evolution system Download PDFInfo
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Abstract
The embodiment of the invention provides a data receiving method and a data receiving device for a radio link control RLC layer in a long time evolution system LTF. A receiving terminal receives a data packet from a transmitting terminal; if the data packet falls in a receiving window, inside-window data reception treatment is executed; if the data packet falls outside the window, whether or not the data packet falls in a protective area is judged; if the data packet falls in the protective area, the data packet is discarded; and otherwise, outside-window data reception treatment is executed. The method can discard a retransmitted data packet falling in the protective area and avoids the problem that the receiving terminal receives the retransmitted data packet and makes the receiving window return because that MAC misjudges a right acknowledgement ACK as a failure acknowledgement NACK, or that the a hybrid automatic repeat request is aroused by the loss of the ACK, after the forward sliding of the receiving window caused by a first situation.
Description
Technical field
The present invention relates to the Data Receiving technology, particularly the method and the device of Radio Link control (RLC, Radio Link Control) layer reception data in Long Term Evolution (LTE, the Long TimeEvolution) system.
Background technology
In the LTE system, according to rlc protocol, the RLC receiving entity of the receiving terminal under the non-answer-mode (UM, Unacknowledged Mode) is safeguarded a receive window, and the lower edge of receive window is VR (UR), and the upper edge is VR (UMR).According to 3GPP 36.322-800 agreement Release 8, the Data Receiving in the LTE system under the UM realizes in the following ways:
A, receiving terminal receive the packet from transmitting terminal.
Packet described here can be non-acknowledged mode data protocol Data Unit (UMD PDU, UMData Protocol Data Unit), in this step, receiving terminal is judged the identical SN of sequence number (SN, Sequence Number) that whether exists in the reception buffering area with described packet, if, then think the packet that the receives packet that send of recurrence of attaching most importance to, with this data packet discarding, otherwise, the packet that receives is placed in the reception buffering area, again execution in step B.
B, judge that the packet receive drops in the receive window or outside the receive window, if the packet that receives drops in the receive window, then carry out Data Receiving processing in the window,, then carry out the outer Data Receiving of window and handle if the packet that receives drops on outside the receive window.
In this step, if VR (UR)≤SN＜VR (UMR) thinks that then packet drops in the receive window, otherwise, think that packet drops on outside the receive window.
Respectively the outer Data Receiving of Data Receiving processing and window in the described window of step B is handled below and set forth.
At first VR (UX) and rearrangement clock (T_Reordering) are introduced, VR (UX) is used for paid-in all one of them packets of packet sign in receive window, T_Reordering is with default time timing, in the process of T_Reordering timing, if the packet of SN=VR (UX) is eliminated, then stop T_Reordering from receive buffering area.After T_Reordering is overtime, slide receiving window forward, and the packet of all satisfied reorganization conditions recombinated and remove, the packet of described satisfied reorganization condition is: SN≤VR (UX), and SN from VR (UX)+1 beginning continuous be kept at the packet that receives the buffering area.
Suppose that receiving terminal receives the packet of SN=X, then the Data Receiving processing is divided into two kinds of situation: X=VR (UR) and VR (UR)＜X＜VR (UMR) in the window, and detailed process is as follows:
If X=VR (UR), then the Data Receiving processing may further comprise the steps in the window:
A1, with receive window to front slide.
Be specially: the lower edge VR (UR) of receive window is slided into the position of the SN that equals the next packet that does not receive as yet, even VR (UR) equals the SN of the next packet that does not receive as yet.
B1, judge to reset clock T_reordering be just in timing or stopped, if the T_reordering clock just in timing, execution in step c1 then, if the T_reordering clock stops, execution in step d1 then.
C1, judge whether VR (UX) has dropped on outside the receive window after sliding, if then stop the T_reordering clock, process ends.
In this step, if VR (UX) has dropped on outside the receive window after sliding, then in follow-up processing, the packet of SN=VR (UX) is recombinated the buffering area and is removed from receiving.
D1, judge whether to receive the packet of the VR (UR) after SN＞slip, if, then VR (UX) is updated to maximum S, and starts the T_reordering clock, otherwise, then make VR (UX) be empty (NULL).Described maximum S is that all satisfy in the packet of the VR (UR) after SN＞renewal, maximum SN.
If VR (UR)＜X＜VR (UMR), then the Data Receiving processing may further comprise the steps in the window:
A2, judge to reset clock T_reordering and whether stop, if, execution in step b2 then.
B2, make VR (UX)=X, and start T_reordering.
Same hypothesis receiving terminal receives the packet of SN=X, and the outer Data Receiving processing procedure of window is as follows:
A3, with receive window to front slide, even VR (UR) is updated to the SN of the packet that meets second rule.The described packet that meets second rule is: do not receive as yet and satisfy in the packet of SN 〉=X+1-UM_Window_Size at all, SN minimal data bag, described UM_Window_Size are receive window length.
B3, judge to reset clock T_reordering be just in timing or stop, if the T_reordering clock just in timing, execution in step c3 then, if the T_reordering clock stops, execution in step d3 then.
C3, if VR (UX) has dropped on outside the receive window after upgrading, then stop the T_reordering clock.
D3, judge if X whether greater than the VR (UR) after upgrading, if then make VR (UX)=X, and start T_reordering.Otherwise, make that VR (UX) is NULL.
In addition, if T_reordering is overtime, then carry out following steps:
A4, with receive window to front slide, even VR (UR) is updated to the SN of the packet that meets first rule, the described packet that meets first rule is: in that do not receive as yet at all and packet SN＞VR (UX), SN minimal data bag.
B4, judge whether to receive the packet of the VR (UR) after SN＞renewal, if, then VR (UX) is updated to maximum S, and starts the T_reordering clock, otherwise, make that VR (UX) is NULL.Described maximum S is that all satisfy in the packet of the VR (UR) after SN＞renewal, maximum SN.
Can analyze from above content and to draw, in the data receive method in above LTE system under the rlc layer UM, have three kinds of situations can cause the slip of receive window:
Situation one: received the packet of SN=VR (UR), caused receive window to front slide, the receive window lower edge slides into the SN place of the next packet that does not receive as yet, and the upper edge slides into the relevant position.
Situation two: T_Reordering is overtime, causes receive window to front slide, and the receive window lower edge slides into VR (UX)+1, and the upper edge slides into VR (UX)+UM_Window_Size.
Here only consider that lower window edge slides into the situation of VR (UX)+1, if make window in fact slide into the situation of big VR in (UX)+1 owing to this UMD PDU has received, this window can be slided and be decomposed into twice window slip, promptly for the first time lower window edge is slided into VR (UX)+1, the receive window that just carries out being caused by situation two is to front slide, for the second time window is slided into the final position, the receive window that just carries out being caused by situation one slides.
Situation three: received SN and dropped on the outer packet of receive window, caused window to front slide, lower window edge slides into X+1-UM_Window_Size, and the upper edge slides into X.
Here only consider that lower window edge slides into the situation of X+1-UM_Window_Size.If make receive window in fact slide into situation greater than X+1-UM_Window_Size owing to this packet has received, the slip of this receive window can be decomposed into twice realizes: for the first time the receive window lower edge is slided into X+1-UM_Window_Size, the receive window that just carries out being caused by situation three slides, for the second time receive window is slided into the final position, the receive window that just carries out being caused by situation one slides.
MAC has introduced to mix and has retransmitted (HARQ automatically in the LTE system, Hybrid Automatic Repeatrequest) mechanism, rlc layer is under UM, if MAC will correctly confirm (ACK, Acknowledgement) erroneous judgement is confirmed (NACK for failure, Non-Acknowledgement) or ACK lose, can cause HARQ.
After causing the slip of receive window by situation one, following situation might appear:
As shown in Figure 1; between the lower edge VR (UR) of the lower edge VR (UR) of the preceding receive window of slip and the back receive window that slides; to form a zone; because after MAC causes that for NACK or ACK lose HARQ causes HARQ with ACK erroneous judgement; the packet that repeats to send may fall into this zone; thereby make receiving terminal receive data processed bag once more, claim this zone to be the protection zone.
And after situation two and situation three cause that receive window slides, above situation can not appear.
Adopt existing method; if packet has fallen into the protection zone; then the decision data bag has fallen into outside the current receive window; receiving terminal is not with this data packet discarding; still adopting existing mode to carry out the outer Data Receiving of window handles: lower window edge is slided into X+1-UM_Window_Size, and the upper edge slides into X.And X is in the back of receive window at this moment, and just X is less than the lower edge VR (UR) of receive window, and this causes receive window to slide backward, i.e. the rollback of receive window.Wish the receive window slip that goes ahead under the normal condition, and the rollback of receive window will cause losing of packet, this does not expect in actual applications.
Summary of the invention
The embodiment of the invention provides rlc layer in a kind of LTE system to receive the method for data, can solve by situation one and cause that receive window is after front slide, because MAC causes HARQ with ACK erroneous judgement for NACK or ACK lose, the packet that causes receiving terminal to receive repeating to send, thus make the problem of receive window rollback.
The embodiment of the invention provides rlc layer in a kind of LTE system to receive the device of data, can solve by situation one and cause that receive window is after front slide, because MAC causes HARQ with ACK erroneous judgement for NACK or ACK lose, the packet that causes receiving terminal to receive repeating to send, thus make the problem of receive window rollback.
Below the technical scheme that provides for the embodiment of the invention:
Rlc layer receives the method for data in a kind of LTE system, and this method comprises:
Receiving terminal receives the packet from transmitting terminal;
If described packet drops in the receive window, then carry out Data Receiving processing in the window;
If described packet drops on outside the receive window, judge then whether described packet drops in the protection zone, if, then abandon described packet, otherwise, carry out the outer Data Receiving of window and handle.
Rlc layer receives the device of data in a kind of LTE system, and this device comprises: receiver module and processing module;
Described receiver module is used to receive the packet from transmitting terminal, and described packet is sent to processing module;
Described processing module is used to receive the packet from receiving terminal; if described packet drops in the receive window; then carry out Data Receiving processing in the window; if whether described packet drops in the outer and protection zone of receive window; then abandon described packet; if described packet drops on outside the receive window and outside the protection zone, then carry out the outer Data Receiving processing of window.
From technique scheme as can be seen; receive the method and the device of data in the LTE system that the embodiment of the invention provides; after receiving the packet that drops on outside the receive window; judge that earlier described packet is whether within the protection zone; if; then abandon described packet, otherwise, the outer data processing of window carried out again.Can abandon the packet that repeats to send that falls into the protection zone; avoided causing that by situation three receive window is after front slide; because MAC causes that for NACK or ACK lose HARQ retransmits with ACK erroneous judgement, the packet that causes receiving terminal to receive repeating to send, thus make the problem of receive window rollback.
Description of drawings
Fig. 1 is the schematic diagram of protection zone in the prior art;
Rlc layer receives the method flow diagram of data in the LTE system that Fig. 2 provides for the embodiment of the invention one;
Rlc layer receives the method flow diagram of data in the LTE system that Fig. 3 provides for the embodiment of the invention two;
Rlc layer receives the flow chart that the protection zone generates and safeguards in the method for data in the LTE system that Fig. 4 provides for the embodiment of the invention two;
Rlc layer receives the flow chart of clock protection in the method for data in the LTE system that Fig. 5 provides for the embodiment of the invention two;
Rlc layer receives the schematic diagram of the protection zone that forms in the method for data in the LTE system that Fig. 6 provides for the embodiment of the invention two;
Rlc layer receives and receives in the receive window in the method for data and the schematic diagram of protection zone during data that the protection window is outer in the LTE system that Fig. 7 provides for the embodiment of the invention two;
Rlc layer receives the structure chart of the device of data in the LTE system that Fig. 8 provides for the embodiment of the invention three.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
First embodiment:
Rlc layer receives the method flow diagram of data in the LTE system that Fig. 2 provides for the embodiment of the invention.As shown in Figure 2:
Step 201: receiving terminal receives the packet from transmitting terminal.
Step 202:, then carry out Data Receiving processing in the window if the packet that receives drops in the receive window; If the packet that receives drops on outside the receive window, judge then whether described packet drops in the protection zone, if, then abandon described packet, otherwise, carry out the outer Data Receiving of window and handle.
In the method that the embodiment of the invention provides, can introduce a protection window, the protection zone is the zone between the lower edge of protection lower edge of window and receive window.
When transmitting terminal and receiving terminal startup, it is identical with receive window to protect window to be initialized as;
When first slip occurring, then protect window to remain unchanged, described first slides is that because receiving terminal receives the packet that sequence number equals the receive window lower edge, the receive window that causes is to front slide.In the present embodiment, described first slides can be identical with situation of the prior art.
If second slip or the 3rd is slided, then protect window and receive window to slide synchronously;
Described second slip is: owing to reset the overtime receive window that causes of clock to front slide, the described the 3rd slides is: drop on outside the window and the packet outside the protection zone because receiving terminal receives, the receive window that causes is to front slide.In the present embodiment, described second slides can be identical with situation of the prior art two, and the described the 3rd slides can be identical with situation of the prior art three.
If receiving terminal has received the packet that drops in the receive window; then this method may further include: judge whether the packet that receives drops on outside the protection window; if then the upper edge that described protection window is pulled forward to described protection window equals the position of the sequence number of described packet.
The above is judged whether described packet drops in the protection zone and can realize in the following ways: whether the sequence number of judging described packet is more than or equal to the lower edge of protection window and less than the lower edge of receive window; if; judge that then described packet drops in the described protection zone; otherwise, judge that described packet drops on outside the protection zone.
If satisfy the clock protective condition; described clock protective condition is; after receive window slides, reset that clock does not start and the protection zone exists; then this method may further include: judge whether the protection clock starts; if, then in cancellation protection zone, the overtime back of described protection clock, otherwise; start the protection clock, in cancellation protection zone, the overtime back of described protection clock.This be because, when resetting clock and do not start, can't slide synchronously with receive window second protection in the season window that slides occurring, that is to say, can't cancel the protection zone resetting the overtime back of clock.Therefore, introduced the protection clock here, under the situation that the rearrangement clock does not start,, then cancelled the protection zone, realized maintenance the protection zone if the protection clock is overtime.
If during described protection clock timing, receiving terminal receives the packet outside the outer and protection zone of receive window of dropping on from transmitting terminal, and then this method further comprises: stop to protect clock.This be because, when receiving terminal receives the packet that drops on receive window outside and outside the protection zone,, can carry out to front slide, thereby dwindle the protection zone protecting window according to aforesaid method, therefore, can stop to protect the maintenance of clock to the protection zone.
Second embodiment:
Rlc layer receives the method flow diagram of data in the LTE system that Fig. 3 provides for the embodiment of the invention.As shown in Figure 3:
Step 301: receiving terminal receives the packet from transmitting terminal.
This step can adopt mode same as the prior art to realize.
Step 302: judge whether the packet that receives drops in the receive window, if then execution in step 303, otherwise, execution in step 304.
Step 303: carry out Data Receiving processing in the window, process ends.
This step can adopt mode same as the prior art to realize.
Step 304: judge whether described packet drops in the protection zone, if then execution in step 305, otherwise, execution in step 306.
Step 305: abandon described packet.
Step 306: carry out the outer Data Receiving of window and handle.
This step can adopt mode same as the prior art to realize.
In addition, the method that the embodiment of the invention provides can further include the process that the protection zone generates and safeguards, as shown in Figure 4:
Step 401: when transmitting terminal and receiving terminal startup, be initialized as default protection window identical with receive window.
In this step, the lower edge of default protection window is VR (PUR), and the upper edge is VR (PUMR), when transmitting terminal and receiving terminal startup, can make:
VR(PUR)＝0，VR(PUMR)＝VR(PUR)+UM_Window_Size-1。
Wherein, UM_Window_Size is a receive window length, because the VR (UR) of receive window also is 0 at this moment, therefore, the protection window is identical with receive window.
Step 402: if first slip, then execution in step 403; If second slip or the 3rd is slided, then execution in step 404; If receiving terminal has received the packet that drops in the receive window, then execution in step 405.
Described first slides is: because receiving terminal receives the packet that sequence number equals the receive window lower edge, the receive window that causes is to front slide.
Described second slides is: owing to reset the overtime receive window that causes of clock to front slide.
The described the 3rd slides is: drop on outside the window and the packet outside the protection zone because receiving terminal receives, the receive window that causes is to front slide.
In the present embodiment, described first slides can be identical with the situation one in the background technology, and described second slides can be identical with situation of the prior art two, and the described the 3rd slides can be identical with situation of the prior art three.
Step 403: the protection window remains unchanged.
By this step, receive window is to front slide, and the protection window remains unchanged, and has formed a zone between the lower edge VR (UR) by lower edge VR (PUR) that protects window and receive window, and described zone is the protection zone, as shown in Figure 6.
So in the embodiment of the invention; can judge in the following ways then whether described packet drops in the protection zone: whether the sequence number of judging described packet is more than or equal to the lower edge of protection window and less than the lower edge of receive window; if; judge that then described packet drops in the described protection zone; otherwise, judge that described packet drops on outside the protection zone.Just, whether the SN of judgment data bag satisfies: VR (PUR)≤SN＜VR (UR), if, judge that then described packet drops in the described protection zone, otherwise, judge that described packet drops on outside the protection zone.
Step 404: protection window and receive window slide synchronously.
Just, order protection window is identical with receive window.
Step 405: judge whether the packet that receives drops on outside the protection window, if then the upper edge that described protection window is pulled forward to described protection window equals the position of the sequence number of described packet.
In this step, still there are the protection zone in VR (PUR) and VR (UR), by will protecting window to front slide, can be in receiving receive window and during the data outside the protection window, and dwindle the protection zone.As shown in Figure 7; the lower edge of protection window and the lower edge of receive window form old protection zone before sliding, and when the SN of packet was 8, the protection window slided; make VR (PUMR)=SN, the lower edge of the protection window after then sliding and the lower edge of receive window form new protection zone.As seen, new protection zone is littler than old protection zone.
In addition; if satisfy the clock protective condition: after receive window slides, reset that clock does not start and the protection zone exists; then the method that provides of the embodiment of the invention can further include the process of clock protection; be specially: judge whether the protection clock starts; if, then in cancellation protection zone, the overtime back of described protection clock, otherwise; start the protection clock, in cancellation protection zone, the overtime back of described protection clock.In addition, if during described protection clock timing, receiving terminal receive from transmitting terminal drop on the outer packet of receive window, then stop to protect clock.
The protection of the above clock can realize by following steps, as shown in Figure 5:
Step 501: judge whether protection clock (T_Protecting) does not start, if then execution in step 502, otherwise, execution in step 503.
Step 502: start the protection clock, make VR (P)=VR (UR), VR (P) is default intermediate variable.
Step 503: judge the protection clock status for still being overtime in timing just, if protect clock just in timing, then execution in step 504, if the protection clock is overtime, and execution in step 505.
Step 504: judge whether receiving terminal receives the packet that receive window is outer and the protection zone is outer that drops on from transmitting terminal, if then execution in step 507, otherwise to protecting clock not operate.
Step 505: judge that the protection window whether after receive window, if then execution in step 506, otherwise do not operate the protection window.
Step 506: order protection window is identical with receive window.
Step 507: stop to protect clock, make that VR (P) is NULL.
The 3rd embodiment:
Rlc layer receives the structure drawing of device of data in the LTE system that Fig. 8 provides for the embodiment of the invention.As shown in Figure 8: this device comprises receiver module 801 and processing module 802.
This device may further include first window adjustment module 803.
First window adjustment module 803 is used for when transmitting terminal and receiving terminal startup; be initialized as default protection window identical with receive window; reception is adjusted message from first of processing module 802, receive described first adjust message after, order protection window remains unchanged.
This device may further include second window adjustment module 804.
Second window adjustment module 804 is used to receive from second of processing module 802 adjusts message, receive described second adjust message after, will protect window and receive window to slide synchronously.
This device may further include the 3rd window adjustment module 805.
The 3rd window adjustment module 805 is used to receive from the 3rd of processing module 802 adjusts message; after receiving described the 3rd adjustment message; whether the packet that judging treatmenting module receives drops on outside the protection window; if then the upper edge that described protection window is pulled forward to described protection window equals the position of the sequence number of described packet.
This device further comprises clock protection module 806.
The above method and apparatus can be applied to the Data Receiving under the rlc layer UM of LTE system, and the RLC receiving entity of receiving terminal receives the packet of bottom MAC.
From technique scheme as can be seen; rlc layer receives the method and the device of data in the LTE system that the embodiment of the invention provides; after receiving the packet that drops on outside the receive window; judge that earlier described packet is whether within the protection zone; if; then abandon described packet, otherwise, the outer data processing of window carried out again.Can abandon the packet that repeats to send that falls into the protection zone; avoided causing that by situation three receive window is after front slide; because MAC causes that for NACK or ACK lose HARQ retransmits with ACK erroneous judgement, the packet that causes receiving terminal to receive repeating to send, thus make the problem of receive window rollback.
In addition, adopt default protection window to carry out the protection zone and generate and safeguard, improved the accuracy of Data Receiving; adopt by default protection clock; under the situation that the rearrangement clock does not start, the clock protection is carried out in the protection zone, still can realize maintenance to the protection zone.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1, Radio Link control rlc layer receives the method for data in a kind of Long Term Evolution LTE system, it is characterized in that this method comprises:
Receiving terminal receives the packet from transmitting terminal;
If described packet drops in the receive window, then carry out Data Receiving processing in the window;
If described packet drops on outside the receive window, judge then whether described packet drops in the protection zone, if, then abandon described packet, otherwise, carry out the outer Data Receiving of window and handle.
2, method according to claim 1 is characterized in that, described protection zone is the zone between the lower edge of protection lower edge of window and receive window, and described protection window is initialized to the zone identical with receive window when transmitting terminal starts with receiving terminal;
Described packet drops in the receive window and comprises: the sequence number of the packet that receives equals the receive window lower edge, and perhaps, the sequence number of the packet that receives is greater than the receive window lower edge and less than the upper edge of receive window;
When described receive window carried out first slip, described protection window was constant; Described first slides is: when the sequence number that receives at receiving terminal equaled the packet of receive window lower edge, the receive window that causes was to front slide.
3, method according to claim 2 is characterized in that, if second slip or the 3rd is slided, then this method further comprises: protection window and receive window slide synchronously;
Described second slip is: owing to reset the overtime receive window that causes of clock to front slide, the described the 3rd slides is: drop on outside the window and the packet outside the protection zone because receiving terminal receives, the receive window that causes is to front slide.
4, method according to claim 2; it is characterized in that; if receiving terminal has received the packet that drops in the receive window; then this method further comprises: judge whether the packet that receives drops on outside the protection window; if then the upper edge that described protection window is pulled forward to described protection window equals the position of the sequence number of described packet.
5, according to the arbitrary described method of claim 2～4; it is characterized in that; describedly judge whether described packet drops in the protection zone and comprise: whether the sequence number of judging described packet is more than or equal to the lower edge of protection window and less than the lower edge of receive window; if; judge that then described packet drops in the described protection zone; otherwise, judge that described packet drops on outside the protection zone.
6, method according to claim 5; it is characterized in that; if satisfy the clock protective condition, described clock protective condition is, after receive window slides, reset that clock does not start and the protection zone exists; then this method further comprises: judge whether the protection clock starts; if, then in cancellation protection zone, the overtime back of described protection clock, otherwise; start the protection clock, in cancellation protection zone, the overtime back of described protection clock.
7, method according to claim 6 is characterized in that, if during described protection clock timing, receiving terminal receives the packet outside the outer and protection zone of receive window of dropping on from transmitting terminal, and then this method further comprises: stop to protect clock.
8, rlc layer receives the device of data in a kind of LTE system, it is characterized in that this device comprises: receiver module and processing module;
Described receiver module is used to receive the packet from transmitting terminal, and described packet is sent to processing module;
Described processing module is used to receive the packet from receiver module; if described packet drops in the receive window; then carry out Data Receiving processing in the window; if described packet drops in the outer and protection zone of receive window; then abandon described packet; if described packet drops on outside the receive window and outside the protection zone, then carry out the outer Data Receiving processing of window.
9, device according to claim 8 is characterized in that, this device further comprises first window adjustment module;
Described processing module is further used for after first slip occurring, send first to first window adjustment module and adjust message, described first slides is, because receiving terminal receives the packet that sequence number equals the receive window lower edge, the receive window that causes is to front slide, and described protection zone is the zone between the lower edge of the lower edge of protection window and receive window;
Described first window adjustment module is used for when transmitting terminal and receiving terminal startup; be initialized as default protection window identical with receive window; reception is adjusted message from first of processing module, receive described first adjust message after, order protection window remains unchanged.
10, device according to claim 9 is characterized in that, this device further comprises second window adjustment module;
Described processing module is further used for after second slip or the 3rd slip occurring, then send second and adjust message to second window adjustment module, described second slides is owing to reset the overtime receive window that causes of clock to front slide, the described the 3rd slides drops on outside the window and the packet outside the protection zone for receiving owing to receiving terminal, and the receive window that causes is to front slide;
Described second window adjustment module is used to receive from second of processing module adjusts message, receive described second adjust message after, will protect window and receive window to slide synchronously.
11, device according to claim 9 is characterized in that, this device further comprises the 3rd window adjustment module;
Described processing module is further used for after having received the packet that drops in the receive window, sends the 3rd to the 3rd window adjustment module and adjusts message;
Described the 3rd window adjustment module is used to receive from the 3rd of processing module adjusts message; after receiving described the 3rd adjustment message; whether the packet that judging treatmenting module receives drops on outside the protection window; if then the upper edge that described protection window is pulled forward to described protection window equals the position of the sequence number of described packet.
12, according to the arbitrary described device of claim 9～11, it is characterized in that this device further comprises the clock protection module;
Described processing module is further used for when satisfying the clock protective condition, and then to clock protection module tranmitting data register protection message, described clock protective condition is, after receive window slides, reset that clock does not start and the protection zone exists;
Described clock protection module is used to receive the clock protection message from processing module; after receiving described clock protection message; judge whether the protection clock starts; if; then in cancellation protection zone, the overtime back of described protection clock; otherwise, start the protection clock, in cancellation protection zone, the overtime back of described protection clock.
13, device according to claim 12; it is characterized in that; described clock protection module is further used for during described protection clock timing, if receiving terminal receives the packet outside the outer and protection zone of receive window of dropping on from transmitting terminal, then stops to protect clock.
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| CN2008101013130A CN101527927B (en) | 2008-03-04 | 2008-03-04 | Data receiving method and data receiving device for radio link control layer in long time evolution system |
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| CN2008101013130A CN101527927B (en) | 2008-03-04 | 2008-03-04 | Data receiving method and data receiving device for radio link control layer in long time evolution system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264104A (en) * | 2010-05-25 | 2011-11-30 | 中兴通讯股份有限公司 | Data packet storage method and equipment thereof |
| CN103501259A (en) * | 2013-10-21 | 2014-01-08 | 腾讯科技（深圳）有限公司 | Packet loss detection method and detector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102547832A (en) * | 2012-02-09 | 2012-07-04 | 中兴通讯股份有限公司 | Method and device for detecting abnormity of user equipment in long term evolution system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474302B1 (en) * | 2002-09-07 | 2005-03-10 | 엘지전자 주식회사 | Buffer control method of radio link control layer |
| CN1257621C (en) * | 2003-05-30 | 2006-05-24 | 中兴通讯股份有限公司 | Transmitting window adjusting method in wireless chain circuit control layer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264104A (en) * | 2010-05-25 | 2011-11-30 | 中兴通讯股份有限公司 | Data packet storage method and equipment thereof |
| WO2011147164A1 (en) * | 2010-05-25 | 2011-12-01 | 中兴通讯股份有限公司 | Method and equipment for storing data packets |
| CN103501259A (en) * | 2013-10-21 | 2014-01-08 | 腾讯科技（深圳）有限公司 | Packet loss detection method and detector |
| WO2015058613A1 (en) * | 2013-10-21 | 2015-04-30 | 腾讯科技（深圳）有限公司 | Method and device for detecting data packet, and storage medium |
| CN103501259B (en) * | 2013-10-21 | 2016-08-31 | 腾讯科技（深圳）有限公司 | A kind of method of packet loss detection and detection device |
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| Publication number | Publication date |
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| CN101527927B (en) | 2011-07-20 |
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