CN101242405A - A generation method and structure for protocol data unit frame of media access control layer - Google Patents
A generation method and structure for protocol data unit frame of media access control layer Download PDFInfo
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Abstract
The invention is a generation method and a structure of a medial access control layer protocol data unit frame, the method comprises the steps of: putting one or more MAC-hs SDS or segments to a MAC-hs PDU frame; and adding a corresponding segment mark to the head information of the frame. The MAC-hs PDU frame strings one or more media access control layer service data units MAC-hs SDU or segments thereof; except the first and last MAC-hs SDU, others are complete and non-segmented; the head information of the frame includes the segment mark; only the first and last MAC-hs SDU or segments has corresponding segment marks. The use of the invention reduces the cost of the head of the MAC-hs PDU frame, and improves frame transmission efficiency.
Description
Technical field
The present invention relates to medium access control layer protocol data cell in the wireless communication system, relate in particular to the generation method of the protocol data unit frame of media access control layer that is applicable to the high data rate Packet Service.
Background technology
Insert the wireless chain control layer of WCDMA system wireless Access Network RAN in the 3G (Third Generation) Moblie Wideband Code Division Multiple Access (WCDMA), protocol Data Unit RLC PDU in the respective wireless carrying is default regular length, generates after wireless chain control layer service data unit RLC SDU is carried out segmentation/serial connection/filling processing and increases corresponding header according to described preset length.
RLC PDU is called media access control layer service data unit MAC SDU after wireless chain control layer sends to media access control layer.At the media access control layer of supporting the high-speed downlink packet access HSDPA function, the MAC-d entity is positioned at radio network controller (RNC), and MAC SDU generates MAC-d PDU through the multiplexing back of logic channel C/T.MAC-d PDU is called MAC-hsSDU by the MAC-hs entity that high speed descending sharing channel Frame Protocol HS-DSCH FP sends to base station B node Node B.MAC-hs SDU is multiplexing and add and generate MAC-hs PDU behind the MAC-hs header.The process of above-mentioned generation MAC-hs PDU as shown in Figure 1, the form that is mapped to MAC-d PDU--on the high speed downlink shared channel HS-DSCH and is MAC-hs SDU as shown in Figure 2, the frame structure of MAC-hs PDU as shown in Figure 3, being explained as follows of each field in the header:
Version Flag (VF): version sign is 1bit.This field provides extended capability for MAC-hs PDU form.This field value is taken as 0 in existing version, and value 1 keeps need not.
Queue Identifier (Queue ID): queue identity is 3bit.This field is used to indicate the sign of recipient's reorder queue.
Transmission Sequence Number (TSN): transmission sequence number is 6bit.This field is provided at the transmission sequence number on the high speed descending sharing channel, and the purpose that is used to reorder is to support the delivery function according to the order of sequence to the upper-layer protocol layer.
Size Index Identifier (SID): length index sign is 6bit.This field is used to represent the length of one group of continuous MAC-d PDU.SID is disposed respectively each Queue ID by high level.
Number of MAC-d PDUs (N): MAC-d PDU number is 7bit.This field is used to represent have the number of the continuous MAC-d PDU of equal length.
Flag (F): domain identifier is 1bit.This field is used for being illustrated in the MAC-hs header and whether also has more field.F is made as and represented that the back followed one group of SID, N, F field at 0 o'clock; Be made as and represented that the back followed MAC-hs SDU at 1 o'clock.The number that is set to 0 F in a TTI is 7 to the maximum.
Can send a MAC-hsPDU at most for each UE in a Transmission Time Interval TTI, the length of MAC-hs header is variable, and the MAC-hs SDU that is multiplexed into a MAC-hsPDU in a TTI belongs to same reorder queue.
In order further to improve data rate and spectrum efficiency on the basis of high-speed downlink packet access HSDPA and high speed uplink packet access HSUPA, the 3G (Third Generation) Moblie partnership projects is organized 3GPP (The 3rd Generation Partnership Project) to propose high-speed packet and is inserted the HSPA evolution items.In this project, for the improvement of radio interface layer 2 scheme of variable-length protocol data unit of wireless links control layer has been proposed, the main thought of this scheme is: wireless links control layer affirmation mode is supported protocol Data Unit length flexibly; Media access control layer MAC-hs entity is supported the segmentation to protocol data unit of wireless links control layer RLC PDU; Whether media access control layer MAC-e and MAC-es support further research is treated in the segmentation of protocol data unit of wireless links control layer RLC PDU.
And media access control layer MAC-hs entity just need be done corresponding modification to existing MAC-hs PDU frame structure in order to support the fragmentation feature to RLC PDU.
Summary of the invention
The invention provides a kind of generation method of protocol data unit frame of media access control layer, saved the head expense to the full extent, improved the frame efficiency of transmission.
The technical solution used in the present invention is:
A kind of generation method of medium access control layer protocol data cell MAC-hs PDU frame is characterized in that, comprising:
One or more media access control layer service data unit MAC-hs SDU or its segmentation are put into MAC-hs PDU frame, except that first is complete unsegmented with MAC-hs SDU last;
When a MAC-hs SDU or segmentation are only arranged in the described frame, in the header of described frame, add first segmentation marker corresponding to this MAC-hs SDU or segmentation;
When a plurality of MAC-hs SDU or segmentation are arranged in the described frame, in the header of described frame, add corresponding to frame in first segmentation marker of first MAC-hs SDU or segmentation, and corresponding to second segmentation marker of last MAC-hs SDU or segmentation in the frame.
Further, described segmentation marker takies 1 bit, has 2 values, and a value X represents corresponding non-last segmentation of MAC-hs SDU; Another value Y represents that corresponding MAC-hs SDU is last segmentation or complete unsegmented.
Further, when having only the segmentation of a MAC-hs SDU in the described frame, in the header of described frame, do not add Length Indication and domain identifier; Otherwise add with frame in each MAC-hs SDU or corresponding Length Indication and the domain identifier of segmentation;
The corresponding MAC-hs SDU or the length of segmentation are represented in described Length Indication; Described domain identifier is indicated the information content after this sign;
Will be with after first MAC-hs SDU is corresponding in the frame Length Indication and domain identifier be placed on described first segmentation marker; Will be with before last MAC-hs SDU is corresponding in the frame Length Indication and domain identifier be placed on described second segmentation marker.
Further, described domain identifier takies 2 bits, and four values are arranged, and the information of a value representation back is other media access control layer service data unit information in this logic channel; The information of a value representation back is Logic Channel Identifier; The information of a value representation back begins to be media access control layer service data unit payload; A value is that retention is used for expansion.
Further, from one or more logic channels, obtain described MAC-hs SDU or its segmentation; In the header of described frame, add Logic Channel Identifier; Described Logic Channel Identifier is represented the logic channel of each MAC-hs SDU in the frame or segmentation correspondence.
Further, in the header of described frame, put into version identifier and transmission sequence number.
Further, if a plurality of logic channels belong to a priority query, and each priority query uses a transmission sequence number, when the MAC-hs SDU in the described frame or segmentation during, add the transmission sequence number of this logic channel in Logic Channel Identifier back described in the described header corresponding to the different priorities formation.
Further, this method specifically is divided into:
(a) find the current logic channel that is scheduled; Obtain first is scheduled in the current logic channel MAC-hs SDU or segmentation, if its length greater than the idle length of MAC-hs PDU, is then carried out (a1); Otherwise carry out (a2);
(a1) MAC-hs is put in the segmentation of telling respective length from described MAC-hs SDU or segmentation
In the PDU frame; Add first segmentation marker in the header of frame, the described first segmentation marker value is X; MAC-hs PDU frame generates and finishes, and finishes;
(a2) described MAC-hs SDU or segmentation are all put into described frame, comprise first segmentation marker in the header of frame, the described first segmentation marker value is Y; Judge whether the residue idle component will put into new MAC-hs SDU; It is execution in step (b) then; Otherwise fill remaining idle component, the MAC-hsPDU frame generates and finishes, and finishes;
(b) obtain MAC-hs SDU or the segmentation that the next one is scheduled;
(c) if the length of MAC-hs SDU that is obtained in the step (b) or segmentation, is carried out (c1) greater than described residue idle component length; Otherwise carry out (c2);
(c1) segmentation of telling respective length from the MAC-hs SDU that obtained or segmentation is put in the MAC-hs PDU frame, increases by second segmentation marker in the header of frame; The described second segmentation marker value is X, and MAC-hs PDU frame generates and finishes, and finishes;
(c2) MAC-hs SDU is all put into described frame; Judge whether the residue idle component will put into new MAC-hs SDU; Be then to return step (b); Otherwise fill remaining idle component, in the header of frame, increase by second segmentation marker; The described second segmentation marker value is Y, and MAC-hs PDU frame generates and finishes, and finishes.
Further, described step (a2), (c1) reach and (c2) also comprise, add expression and put into the MAC-hs SDU of frame or the Length Indication of section length in the header of frame.
Further, also comprise in the described step (a), in the header of described frame, add version identifier, transmission sequence number and current Logic Channel Identifier.
Further, described step (b) is specially:
(b1) judging whether continue to handle current logic channel, is execution in step (b2) then, otherwise execution in step (b3);
(b2) obtain the next MAC-hs SDU that is scheduled in the current logic channel, execution in step (c);
(b3) obtain first MAC-hs SDU that is scheduled in the next logic channel, execution in step (c).
Further, described step (a2) and (c2) in, if described residue idle component does not add new MAC-hs SDU, then the adding value is the domain identifier of " information of back begins to be media access control layer service data unit payload " in described header;
In the described step (c1), the adding value is the domain identifier of " information of back begins to be media access control layer service data unit payload " in described header;
In the described step (b1), the adding value is the domain identifier of " information of back is other media access control layer service data unit information in the current logic channel " in described header;
In the described step (b2), in the header of described frame, increase the Logic Channel Identifier of described next logic channel, and the adding value is the domain identifier of " information of back is Logic Channel Identifier ".
Further, in the described step (b), when all media access control layer service data units of current logic channel are finished dealing with, in the time of perhaps will beginning to handle next logic channel, no longer continue to handle current logic channel based on scheduling strategy.
The present invention also provides a kind of structure of medium access control layer protocol data cell MAC-hs PDU frame, the one or more media access control layer service data unit MAC-hs SDU of serial connection or its segmentation in the described frame; It is characterized in that:
In the described frame, except that first is complete unsegmented with MAC-hs SDU last;
Comprise segmentation marker in the header of described frame; Only first has corresponding segmentation marker with last MAC-hs SDU or segmentation.
Further, described segmentation marker takies 1 bit, has 2 values, non-last segmentation of the MAC-hs SDU of a value representation correspondence; The MAC-hs SDU of another value representation correspondence is last segmentation or complete unsegmented.
Further, when having only the segmentation of a MAC-hs SDU in the described frame, do not comprise Length Indication and domain identifier in the header of described frame; Otherwise comprise with frame in each MAC-hs SDU or corresponding Length Indication and the domain identifier of segmentation;
The corresponding MAC-hs SDU or the length of segmentation are represented in described Length Indication; Described domain identifier is indicated the information content after this sign;
In the described header, the Length Indication of first MAC-hs SDU or segmentation correspondence and domain identifier are after its corresponding segmentation marker in the frame; The Length Indication of last MAC-hs SDU correspondence and domain identifier are before its corresponding segmentation marker in the frame.
Further, described domain identifier takies 2 bits, and four values are arranged, and the information of a value representation back is other media access control layer service data unit information in this logic channel; The information of a value representation back is Logic Channel Identifier; The information of a value representation back begins to be media access control layer service data unit payload; A value is that retention is used for expansion.
Further, described MAC-hs SDU or its segmentation come from one or more logic channels; Comprise Logic Channel Identifier in the header of described frame; Described Logic Channel Identifier is represented the logic channel of each MAC-hs SDU in the frame or segmentation correspondence.
Further, comprise version identifier and transmission sequence number in the header of described frame.
Further, if a plurality of logic channels belong to a priority query, each priority query uses a transmission sequence number, when the MAC-hs SDU in the described frame or segmentation during corresponding to the different priorities formation, the Logic Channel Identifier back comprises the transmission sequence number of this logic channel in the described header.
After adopting the present invention, SI only appears at the part end to end of MAC-hs PDU frame head, thereby has simplified MAC-hs PDU head, has simplified framing and has conciliate the frame processing; In addition, method of the present invention can be supported elongated RLC PDU, and supports segmentation and the serial connection of MAC-d PDU, has kept better compatibility backward simultaneously.
Description of drawings
Fig. 1 is the schematic diagram of MAC-hs PDU framing process in the prior art;
Fig. 2 is a MAC-hs SDU frame structure schematic diagram in the prior art;
Fig. 3 is a MAC-hs PDU frame structure schematic diagram in the prior art;
Fig. 4 is a MAC-hs SDU frame structure schematic diagram among the present invention;
Fig. 5 is a MAC-hs PDU frame basic structure schematic diagram among the present invention;
Fig. 6 is the schematic diagram of one of MAC-hs PDU frame simplified structure among the present invention;
Fig. 7 is two a schematic diagram of MAC-hs PDU frame simplified structure among the present invention;
Fig. 8 is three a schematic diagram of MAC-hs PDU frame simplified structure among the present invention;
Fig. 9 is the schematic diagram of one of MAC-hs PDU frame expansion structure among the present invention;
Figure 10 is two a schematic diagram of MAC-hs PDU frame expansion structure among the present invention.
Figure 11 is the flow chart of MAC-hs PDU frame generating method among the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Among the present invention, it is multiplexing that media access control layer MAC-d PDU does not carry out the C/T of logic channel, is mapped to MAC-d PDU on the HS-DSCH and is MAC-hs SDU frame structure as shown in Figure 4; The C/T that does not carry out logic channel at MAC-d is multiplexing, so need not add the MAC-d header.
Among the present invention, MAC-hs PDU supports the MAC-d PDU in a logic channel and/or a plurality of logic channel to carry out multiplexing.
The implementation method of MAC-hs PDU frame provided by the invention can be good at taking into account various situations, supports serial connection and the segmentation of a plurality of MAC-hs SDU on a plurality of logic channels, and head expense minimum; Thinking of the present invention be exactly MAC-hs SDU in the middle of being serially connected among the MAC-hs PDU all be complete, so do not need SI, SI only appears at the part end to end of MAC-hs PDU header, thereby has simplified MAC-hs PDU header, has simplified framing and has conciliate the frame processing.
At first introduce the basic format that adopts MAC-hs PDU frame provided by the invention, referring to Fig. 5, being explained as follows of each field in the header wherein, wherein the notion of MAC-hs SDU comprises complete MAC-hs SDU and/or its segmentation.
The function of VF, TSN is same as the prior art.
LCID (logical channel ID): Logic Channel Identifier, be used to represent MAC-hs PDU frame the logic channel of multiplexing MAC-hs SDU correspondence.
SI: segmentation marker.In MAC-hs PDU header, use the segmentation marker SI of 1 bit represent wherein multiplexing MAC-hs SDU whether complete be its segmentation situation one by one.SI has 2 values, non-last segmentation of MAC-hs SDU that increases newly in one of them value representation MAC-hs PDU frame.MAC-hs SDU newly-increased in another value representation MAC-hs PDU frame is last segmentation, if newly-increased MAC-hs SDU is complete unsegmented, also uses this value representation; In the narration of back, when mentioning the SI value, above two kinds of meanings have just been comprised for " being last segmentation ".
In frame of the present invention, SI only appears at part end to end; Because the MAC-hsSDU that is connected in series in the described frame except that first with last all be complete unsegmented; That is to say that only first has corresponding segmentation marker with last MAC-hs SDU or segmentation.
LI: Length Indication.In MAC-hs PDU header, use Length Indication LI represent the length of multiplexing each MAC-hs SDU, desirable 10 bits of the length of LI or 11 bits.
F: domain identifier.The information content after the domain identifier F of two bits of use indicates this sign in MAC-hs PDU header; F has 4 values, and the information of one of them value representation back is other MAC-d SDU information in this logic channel; The information of a value representation back is Logic Channel Identifier LCID; The information of a value representation back begins the payload for MAC-hs SDU; A value is that retention is used for expansion in the future.
In adopting the frame structure that method of the present invention generated, first LCID appears at the TSN back, and first SI is followed in the back, and the back is first group of LI and F again; Other LCID appear at the back of F, and this moment, the F value was for representing the value of " information of back is Logic Channel Identifier LCID ".Second SI appears at the back of LI and F, rather than appears at the front of last LI, guaranteed the certainty that LI resolves.Second SI back is the payload in this MAC-hs PDU frame.
To introduce the generation method of MAC-hs PDU among the present invention below, groundwork is finished in the MAC-hs entity, and its step is as follows:
Step 1, the MAC-hs entity is dispatched successively according to logic channel, finds the current logic channel that is scheduled, and adds the LCID of VF and TSN and current logic channel in the head of MAC-hs PDU frame earlier.
Step 2, MAC-hs entity are obtained first MAC-hsSDU that is scheduled in the current logic channel, and whether the length of judging this MAC-hs SDU greater than MAC-hs PDU idle length, if, execution in step 2.1, otherwise, execution in step 2.2.
Step 2.1 adopts frame structure shown in Figure 6, and the LCID back adds unique segmentation marker SI in the header of frame, owing to MAC-hs SDU all can not be put into described frame, the SI value is the value of expression " non-last segmentation "; LI and F do not appear in the header.
As this MAC-hs SDU before this not by the segmentation of MAC-hs entity, then according to described idle length and head expense, determine to be placed into the MAC-hs SDU length in this PDU frame, from the MAC-hs SDU that is obtained, tell suitable length segment and put in the MAC-hs PDU frame, become the MAC-hsSDU payload;
As this MAC-hs SDU by the segmentation of MAC-hs entity, then according to described idle length and head expense, determine to be placed into the MAC-hs SDU length in this PDU frame, from the MAC-hs SDU segmentation of being obtained, tell suitable length segment and put in the MAC-hs PDU frame, become MAC-hs SDU payload;
So far, MAC-hs PDU frame generates and finishes, and is sent to down one deck.
Step 2.2, the LCID back adds the length L I of first segmentation marker SI and this MAC-hs SDU successively in the header of frame; No matter this MAC-hs SDU is complete or a segmentation, all it is all put into this MAC-hs PDU frame, becomes MAC-hs SDU payload; Therefore the SI value is the value of expression " last segmentation ".
Then whether also to put into new MAC-hs SDU or its segmentation in the judgment frame, be not suitable for putting into again then execution in step 3 if think; Otherwise execution in step 4.
Step 3, the frame structure of employing Fig. 7, the LI back adds domain identifier F in the header of frame, and value is the value of expression " information of back begins the payload for MAC-hs SDU ", if any the residue idle component, then uses PADDING to fill; When the length of MAC-hs SDU or segmentation just in time equals described idle length, then do not remain idle component.
That is to say, when only comprising the last segmentation of a whole M AC-hs SDU or MAC-hs SDU in the frame, each one of SI, LI and F only occurs.
So far, MAC-hs PDU frame generates and finishes, and is sent to down one deck.
Step 4, judge whether to continue to handle current logic channel, usually, when all MAC-hs SDU of current logic channel finish dealing with, perhaps finish dealing with the back will begin to handle next logic channel based on certain scheduling strategy the time, no longer continue to handle current logic channel at certain MAC-hs SDU.
If handle current logic channel, then execution in step 4.1; Otherwise, execution in step 4.2;
Step 4.1 is obtained the next MAC-hs SDU that is scheduled in the current logic channel, adds F behind the LI in the header of frame, and the F value is the value of expression " information of back is other MAC-d SDU information in the current logic channel "; Execution in step 5.
Step 4.2, obtain first MAC-hs SDU that is scheduled in next logic channel, add F behind the LI in the header of frame, the F value is the value of expression " information of back is Logic Channel Identifier LCID ", and adds the LCID of described next logic channel in described header behind the F; Execution in step 5.
If only comprise a plurality of MAC-hs SDU or the MAC-hs SDU segmentation of a logic channel among the MAC-hs PDU, segmentation only may be the MAC-hs SDU of first SI correspondence or the MAC-hs SDU of last SI correspondence, and middle MAC-hs SDU is complete.In this case, SI is identical redundancy, can omit.Logic Channel Identifier only occurs one in the frame head; The structure of the frame that generates as shown in Figure 8.
If comprise a plurality of MAC-hs SDU or other MAC-hs SDU segmentation of a plurality of logic channels among the MAC-hs PDU, if last MAC-d PDU of the logic channel in front place a segmentation in this MAC-hs PDU after, just begin to put into the MAC-hs SDU or the MAC-hs SDU segmentation of next logic channel, will increase and handle complexity.So in this case, middle MAC-hs SDU generally also is complete, have only first logic channel first SI indication may be the final stage of MAC-hs SDU segmentation, and last SI indication of last logic channel may be first section of MAC-hs SDU segmentation.In this case, middle MAC-hs SDU is complete, and SI is identical redundancy, is omissible.The structure of the frame that generates as shown in Figure 5; This frame structure also is a kind of structure of standard of comparison.
Whether step 5, the length of judging the MAC-hs SDU obtained greater than described residue idle length, if, execution in step 5.1, otherwise, execution in step 5.2.
Step 5.1 according to described residue idle length and head expense, determines to be placed into the MAC-hs SDU length in this PDU frame, tells the part that is fit to length and put in the MAC-hs PDU frame from the MAC-hs SDU that is obtained, and becomes MAC-hs SDU payload; In header, increase the LI of MAC-hs SDU section length newly-increased in the expression frame successively, corresponding to F and second segmentation marker SI of this newly-increased segmentation, the F value is represented " information of back begins the payload for MAC-hs SDU "; Owing to the MAC-hs SDU that is obtained all can not be put into described frame, the value of the value representation that described second segmentation marker SI gets " non-last segmentation ".
So far, MAC-hs PDU frame generates and finishes, and is sent to down one deck.
Step 5.2 is all put into this MAC-hs PDU frame with the MAC-hs SDU that is obtained, and becomes MAC-hs SDU payload; The LI that in header, adds this MAC-hs SDU length of expression.
Then whether also to put into new MAC-hs SDU or its segmentation in the judgment frame, be not suitable for putting into again then execution in step 6 if think; Otherwise return step 4.
Step 6, the LI back adds domain identifier F and second SI in the header of frame; The value of F is the value of expression " information of back begins the payload for MAC-hs SDU "; Because MAC-hsSDU has all put into frame in step 5.2, so the value of SI is the value of expression " being last segmentation ".
If any the residue idle component, then use PADDING to fill; When the length of MAC-hs SDU or segmentation just in time equals described idle length, then do not remain idle component.
So far, MAC-hs PDU frame generates and finishes, and is sent to down one deck.
From step 5,6 as can be seen, second SI in the described header appears at the back of last F, and whether last the MAC-hs SDU that is used for representing putting into frame is a complete unsegmented MAC-hs SDU or last segmentation; If not, so just represent that it is first segmentation of a MAC-hsSDU.Second SI back is the payload in this MAC-hs PDU frame.
Above step is for generating the step of a MAC-hs PDU frame.
As can be seen, when first segmentation that comprises a MAC-hs SDU among the MAC-hs PDU or medial section, the part long enough that this MAC-hs SDU does not send as yet is described, can take a MAC-hs PDU payload segment fully, so can not comprise the segmentation of other MAC-hs SDU or other MAC-hs SDU among this MAC-hs PDU.In this case, LI and F are redundant, and the length of MAC-hs SDU segmentation can obtain according to the length computation of MAC-hs PDU, and the information of acquiescence back begins the payload for MAC-SDU.
And when MAC-hs SDU that has other in the frame or other MAC-hs SDU segmentation, the pairing MAC-hs SDU of first SI must be a complete MAC-hs SDU or its last segmentation, because a MAC-hs SDU is not put into before the frame fully, be to begin to put second MAC-hs SDU.
It can also be seen that the LI of first MAC-hs SDU correspondence of first logic channel appears at first SI back in the header, the LI of first MAC-hs SDU correspondence of other logic channels appears at the LCID back.Non-first LI of each logic channel appears at the back of the F corresponding with the previous MAC-hs SDU that puts into described frame, and this moment, the value of F should be represented " information of back is other MAC-d SDU information in this logic channel ".
As from the foregoing, carry out framing with this method after, SI is at most only occurring twice end to end, only occurs once sometimes, mid portion does not occur, thereby has reduced the head spending, further reduces processing expenditure.And this method can be supported elongated RLC PDU, supports segmentation and the serial connection of MAC-d PDU, has kept better compatibility backward simultaneously.
In addition, at some in particular cases, for satisfying particular demands, generation be the expansion frame.
Such as, last MAC-hs SDU of last logic channel is segmentation among the MAC-hs PDU, in next TTI, based on certain strategy, this logic channel can't obtain scheduling, in this case, among the MAC-hs PDU on each logic channel first MAC-hs SDU all need to support segmentation, the frame structure of Sheng Chenging as shown in Figure 9 in this case, in step 4.2, in frame head, increase a SI behind the LCID of each logic channel, represent the segmentation situation of first MAC-hs SDU of this logic channel.Also may there be segmentation in last MAC-hs SDU of last logic channel, so 2 SI are arranged on last logic channel.
For another example, consider that a plurality of logic channels belong to the situation of a priority query, a TSN of each priority query's use, MAC-hs PDU may multiplexing a plurality of priority queries--be MAC-hs SDU in its frame corresponding to the different priorities formation, thereby need to comprise a plurality of TSN in this frame head.Frame structure in this case in step 4.2, increases the TSN of this logic channel as shown in figure 10 behind the LCID of each logic channel in frame head.
In reality is implemented, among Fig. 5 shared figure place of each field and actual residing position may with the present invention in defined incomplete same, similar Fig. 9 also may appear to the such expansion of Figure 10, as long as but having used implication and framing method described in the above-mentioned explanation of field, then should think also to belong to content of the present invention.
Claims (20)
1. the generation method of a medium access control layer protocol data cell MAC-hs PDU frame is characterized in that, comprising:
One or more media access control layer service data unit MAC-hs SDU or its segmentation are put into MAC-hs PDU frame, except that first is complete unsegmented with MAC-hs SDU last;
When a MAC-hs SDU or segmentation are only arranged in the described frame, in the header of described frame, add first segmentation marker corresponding to this MAC-hs SDU or segmentation;
When a plurality of MAC-hs SDU or segmentation are arranged in the described frame, in the header of described frame, add corresponding to frame in first segmentation marker of first MAC-hs SDU or segmentation, and corresponding to second segmentation marker of last MAC-hs SDU or segmentation in the frame.
2. the method for claim 1 is characterized in that, described segmentation marker takies 1 bit, has 2 values, and a value X represents corresponding non-last segmentation of MAC-hs SDU; Another value Y represents that corresponding MAC-hs SDU is last segmentation or complete unsegmented.
3. the method for claim 1 is characterized in that, when having only the segmentation of a MAC-hs SDU in the described frame, does not add Length Indication and domain identifier in the header of described frame; Otherwise add with frame in each MAC-hs SDU or corresponding Length Indication and the domain identifier of segmentation;
The corresponding MAC-hs SDU or the length of segmentation are represented in described Length Indication; Described domain identifier is indicated the information content after this sign;
Will be with after first MAC-hs SDU is corresponding in the frame Length Indication and domain identifier be placed on described first segmentation marker; Will be with before last MAC-hs SDU is corresponding in the frame Length Indication and domain identifier be placed on described second segmentation marker.
4. method as claimed in claim 3 is characterized in that described domain identifier takies 2 bits, and four values are arranged, and the information of a value representation back is other media access control layer service data unit information in this logic channel; The information of a value representation back is Logic Channel Identifier; The information of a value representation back begins to be media access control layer service data unit payload; A value is that retention is used for expansion.
5. the method for claim 1 is characterized in that: obtain described MAC-hs SDU or its segmentation from one or more logic channels; In the header of described frame, add Logic Channel Identifier; Described Logic Channel Identifier is represented the logic channel of each MAC-hs SDU in the frame or segmentation correspondence.
6. method as claimed in claim 5 is characterized in that, puts into version identifier and transmission sequence number in the header of described frame.
7. method as claimed in claim 6, it is characterized in that, if a plurality of logic channels belong to a priority query, and each priority query uses a transmission sequence number, when the MAC-hs SDU in the described frame or segmentation during, add the transmission sequence number of this logic channel in Logic Channel Identifier back described in the described header corresponding to the different priorities formation.
8. method as claimed in claim 2 is characterized in that, this method specifically is divided into:
(a) find the current logic channel that is scheduled; Obtain first is scheduled in the current logic channel MAC-hs SDU or segmentation, if its length greater than the idle length of MAC-hs PDU, is then carried out (a1); Otherwise carry out (a2);
(a1) segmentation of telling respective length from described MAC-hs SDU or segmentation is put in the MAC-hsPDU frame; Add first segmentation marker in the header of frame, the described first segmentation marker value is X; MAC-hs PDU frame generates and finishes, and finishes;
(a2) described MAC-hs SDU or segmentation are all put into described frame, comprise first segmentation marker in the header of frame, the described first segmentation marker value is Y; Judge whether the residue idle component will put into new MAC-hs SDU; It is execution in step (b) then; Otherwise fill remaining idle component, the MAC-hsPDU frame generates and finishes, and finishes;
(b) obtain MAC-hs SDU or the segmentation that the next one is scheduled;
(c) if the length of MAC-hs SDU that is obtained in the step (b) or segmentation, is carried out (c1) greater than described residue idle component length; Otherwise carry out (c2);
(c1) segmentation of telling respective length from the MAC-hs SDU that obtained or segmentation is put in the MAC-hs PDU frame, increases by second segmentation marker in the header of frame; The described second segmentation marker value is X, and MAC-hs PDU frame generates and finishes, and finishes;
(c2) MAC-hs SDU is all put into described frame; Judge whether the residue idle component will put into new MAC-hs SDU; Be then to return step (b); Otherwise fill remaining idle component, in the header of frame, increase by second segmentation marker; The described second segmentation marker value is Y, and MAC-hs PDU frame generates and finishes, and finishes.
9. method as claimed in claim 8 is characterized in that: described step (a2), (c1) reach and (c2) also comprise, add expression and put into the MAC-hs SDU of frame or the Length Indication of section length in the header of frame.
10. method as claimed in claim 8 is characterized in that, also comprises in the described step (a), adds version identifier, transmission sequence number and current Logic Channel Identifier in the header of described frame.
11. method as claimed in claim 10 is characterized in that, described step (b) is specially:
(b1) judging whether continue to handle current logic channel, is execution in step (b2) then, otherwise execution in step (b3);
(b2) obtain the next MAC-hs SDU that is scheduled in the current logic channel, execution in step (c);
(b3) obtain first MAC-hs SDU that is scheduled in the next logic channel, execution in step (c).
12. method as claimed in claim 11 is characterized in that:
Described step (a2) and (c2) in, if described residue idle component does not add new MAC-hsSDU, then the adding value is the domain identifier of " information of back begins to be media access control layer service data unit payload " in described header;
In the described step (c1), the adding value is the domain identifier of " information of back begins to be media access control layer service data unit payload " in described header;
In the described step (b1), the adding value is the domain identifier of " information of back is other media access control layer service data unit information in the current logic channel " in described header;
In the described step (b2), in the header of described frame, increase the Logic Channel Identifier of described next logic channel, and the adding value is the domain identifier of " information of back is Logic Channel Identifier ".
13. method as claimed in claim 11, it is characterized in that, in the described step (b), when all media access control layer service data units of current logic channel are finished dealing with, in the time of perhaps will beginning to handle next logic channel, no longer continue to handle current logic channel based on scheduling strategy.
14. the structure of a medium access control layer protocol data cell MAC-hs PDU frame, the one or more media access control layer service data unit MAC-hs SDU of serial connection or its segmentation in the described frame; It is characterized in that:
In the described frame, except that first is complete unsegmented with MAC-hs SDU last;
Comprise segmentation marker in the header of described frame; Only first has corresponding segmentation marker with last MAC-hs SDU or segmentation.
15. structure as claimed in claim 14 is characterized in that: described segmentation marker takies 1 bit, has 2 values, non-last segmentation of the MAC-hs SDU of a value representation correspondence; The MAC-hs SDU of another value representation correspondence is last segmentation or complete unsegmented.
16. structure as claimed in claim 14 is characterized in that: when having only the segmentation of a MAC-hs SDU in the described frame, do not comprise Length Indication and domain identifier in the header of described frame; Otherwise comprise with frame in each MAC-hs SDU or corresponding Length Indication and the domain identifier of segmentation;
The corresponding MAC-hs SDU or the length of segmentation are represented in described Length Indication; Described domain identifier is indicated the information content after this sign;
In the described header, the Length Indication of first MAC-hs SDU or segmentation correspondence and domain identifier are after its corresponding segmentation marker in the frame; The Length Indication of last MAC-hs SDU correspondence and domain identifier are before its corresponding segmentation marker in the frame.
17. structure as claimed in claim 14 is characterized in that, described domain identifier takies 2 bits, and four values are arranged, and the information of a value representation back is other media access control layer service data unit information in this logic channel; The information of a value representation back is Logic Channel Identifier; The information of a value representation back begins to be media access control layer service data unit payload; A value is that retention is used for expansion.
18. method as claimed in claim 14 is characterized in that, described MAC-hs SDU or its segmentation come from one or more logic channels; Comprise Logic Channel Identifier in the header of described frame; Described Logic Channel Identifier is represented the logic channel of each MAC-hs SDU in the frame or segmentation correspondence.
19. method as claimed in claim 18 is characterized in that, comprises version identifier and transmission sequence number in the header of described frame.
20. method as claimed in claim 19, it is characterized in that, if a plurality of logic channels belong to a priority query, each priority query uses a transmission sequence number, when the MAC-hs SDU in the described frame or segmentation during corresponding to the different priorities formation, the Logic Channel Identifier back comprises the transmission sequence number of this logic channel in the described header.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100792034A CN101242405A (en) | 2007-02-09 | 2007-02-09 | A generation method and structure for protocol data unit frame of media access control layer |
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| CNA2007100792034A CN101242405A (en) | 2007-02-09 | 2007-02-09 | A generation method and structure for protocol data unit frame of media access control layer |
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