CN102984694A

CN102984694A - Apparatus and method for constructing data unit including buffer status report

Info

Publication number: CN102984694A
Application number: CN2012104793836A
Authority: CN
Inventors: 千成德; 李承俊; 朴成埈; 李英大
Original assignee: LG Electronics Inc
Current assignee: Amazon Technologies Inc
Priority date: 2008-02-20
Filing date: 2009-02-20
Publication date: 2013-03-20
Anticipated expiration: 2029-02-20
Also published as: CN101953095A; CN101953096B; CN102984694B; CN101953096A; CN103037438B; CN101953095B; CN103037438A

Abstract

Provided is an apparatus and method for constructing a data unit that includes a buffer status report (BSR) such that when BSR triggering is performed, the size(s) of the necessary sub-header(s) are also to be considered together in addition to the BSR size. There is a checking unit that checks whether any padding region is available in a MAC PDU that was constructed, a comparing unit that compares the number of padding bits with the size of a buffer status report (BSR) plus its sub-header, and a processing unit that cooperates with the checking unit and the comparing unit to trigger a buffer status report (BSR) procedure if the number of padding bits is larger than the size of the BSR plus its sub-header, including the BSR and its sub-header in the MAC PDU, and setting an LCID in the sub-header to indicate a BSR is included, the BSR having been triggered due to padding. Using such apparatus allows the sub-header(s) to be inserted (included) into the MAC PDU (or transport block (TB) or other data unit).

Description

Structure comprises the apparatus and method of the data cell of Buffer Status Report

The application is that the original bill application number is the application for a patent for invention (international application no: PCT/KR2009/000828 of 200980105611.X, the applying date: on February 20th, 2009, denomination of invention: structure comprises the apparatus and method of data cell of Buffer Status Report) divide an application.

Technical field

The present invention relates to the apparatus and method that structure comprises the data cell of Buffer Status Report (BSR:buffer status report).

Background technology

In the prior art, the executive buffer status report, but unnecessarily wasted Radio Resource.Like this, prior art does not address this is that fully, and therefore suitable solution is not provided.

Summary of the invention

The inventor recognizes at least defects of prior art.Based on this understanding, conceived various feature described below, thereby the data cell that structure is comprised Buffer Status Report (BSR) is improved, so that when structure protocol Data Unit (PDU:protocol data unit) (perhaps transmission block (TB:Transport Block) or other categorical data unit), the remaining available part fill area that can be used as to insert buffer status information wherein, this can more effectively use Radio Resource.

Description of drawings

Fig. 1 illustrates E-UMTS(evolved universal mobile communication system) exemplary network architecture.

Fig. 2 illustrates based on the portable terminal of 3GPP Radio Access Network standard and the chain of command Radio interface protocols between the base station.

Fig. 3 illustrates based on the portable terminal of 3GPP Radio Access Network standard and the user's face Radio interface protocols between the base station.

Fig. 4 illustrates the example MAC PDU form that is used by the MAC entity.

Fig. 5 illustrates the example MAC PDU sub-header form that is used by the MAC entity.

Fig. 6 illustrates the example MAC PDU sub-header form that is used by the MAC entity.

Fig. 7 illustrates the BSR MAC control element of exemplary short BSR and brachymemma.

Fig. 8 illustrates exemplary long BSR MAC control element.

Fig. 9 is illustrated in example MACPDU in the situation that has BSR and do not have BSR, that comprise data and filling.

Figure 10 illustrates portable terminal and receives structure size and be the example of the instruction of the MAC PDU of L+M+3 byte.

Figure 11 illustrates MAC PDU and includes the example of 2 bytes at remaining space, and wherein, 1 byte is used for filled type BSR, and the MAC sub-header only has 1 byte to be used for additional purpose.

Figure 12 is illustrated in two kinds of example implementation of constructing the MAC PDU that includes BSR in the situation that has the BSR sub-header and do not have the BSR sub-header.

Figure 13 illustrates three kinds of example implementation that structure includes the MAC PDU of BSR.

Figure 14 illustrates two kinds of other example implementation that structure includes the MAC PDU of BSR.

Figure 15 illustrates three kinds of other example implementation that structure includes the MAC PDU of BSR.

Figure 16 illustrates following this situation: the existence of filling LCID can not be distinguished whether still having data in the buffering area of UE, and in order to improve the efficient of eNB scheduler, be not to waste 2 bytes by filling LCID, on the contrary these 2 bytes being used for short BSR will more have effect.

Figure 17 illustrates how to indicate two kinds of possible realizations (a) of there being filled type BSR and (b).

Figure 18 is illustrated in two kinds of location filled type BSR in the situation that use clearly indicates and may realizes.

Figure 19 still remains the situation of 2 bytes after being illustrated in and being included in short BSR among the MAC PDU, thereby should replace short BSR with long BSR.

Figure 20 is illustrated in the situation that long BSR still remains 2 bytes afterwards that comprises.

Figure 21 is illustrated in the situation of implicit filled type BSR indication, comprise the situation of 2 remainder bytes after long BSR.

2 bytes enough comprise short BSR and should replace form (a) by using form (b) so Figure 22 illustrates.

Figure 23 illustrates the situation that has remained 2 bytes for the MAC PDU that comprises short BSR.

Figure 24 illustrates the situation that has remained 2 bytes for the MAC PDU that comprises long BSR.

Figure 25 illustrates the operating position of 2 byte remaining spaces (filled type BSR is last) of TB.

Figure 26 illustrates remaining space and enough comprises long BSR and a plurality of BSR are shown and be included in different situations among the MAC PDU.

Figure 27 illustrates a plurality of BSR and is included among the MAC PDU.

Figure 28 illustrates the situation that remaining space and the space of distributing to " routine " and " periodically " BSR is merged to comprise long BSR.

Figure 29 illustrates the UE that comprises the MAC entity with specific protocol layer and the exemplary construction of eNB.

Embodiment

For Long Term Evolution (LTE:Long Term evolution) system or conduct other so-called 4G communication system of the enhancing of current 3GPP technology is explained inventive concept and the feature that relates to the processing of Buffer Status Report (BSR) herein.But these details are not the restriction to above-mentioned feature, and above-mentioned feature can be applicable to movement and/or wireless communication system and the method for other type.

Below, term " portable terminal " will be used to refer to various types of subscriber equipmenies, such as the miscellaneous equipment of mobile communication terminal, subscriber equipment (UE:user equipment), mobile device (ME:mobile equipment) and all kinds of wireless communication technologys of support.

The present invention relates to swap data between base station in so-called Long Term Evolution (LTE) system and the portable terminal.Specifically, from each logic channel receives data time structure MAC PDU(or such as the data cell of other type of transmission block) the MAC entity, but the packing space time spent in MAC PDU, portable terminal utilizes this fill area of MAC PDU effectively to send buffer status information, thereby unnecessary waste of radio resources is minimized.

Fig. 1 illustrates the E-UMTS(evolved universal mobile communication system as a kind of mobile communication system) 100 exemplary network architecture.The E-UMTS system is the system that is come by the UMTS system evolved, and is carried out now the basic standardization task of E-UMTS system by the 3GPP tissue.The E-UMTS system can be described as Long Term Evolution (LTE) system, and it is from current 3G mobile communication system evolution and the so-called 4G or the system of future generation that come.

E-UMTS network 100 is divided into the E-UTRAN(evolved universal terrestrial radio access network usually) 110 and the CN(core net).E-UTRAN for example comprises portable terminal 112(, subscriber equipment (UE), travelling carriage, mobile phone, mobile phone etc.), base station 114,116,118(for example, eNode B, access point (AP:access point), network node etc.), be positioned at network one end and the gateway (S-GW:serving gateway) 122,124 that is connected with external network and Mobility Management Entity (MME:mobility management entity) 122,124 that each mobility aspect of portable terminal is managed.For single eNode B, there are one or more residential quarters (perhaps regional, regional etc.).

Fig. 2 and Fig. 3 illustrate based on the portable terminal of 3GPP Radio Access Network standard and the Radio interface protocols between the base station.Be divided into physical layer, data link layer and network layer on this Radio interface protocols level, and be divided into user's face of transmission data message and the chain of command of transfer control signal (signaling) on vertical.These protocol layers can be divided into L1(layer 1), L2(layer 2) and L3(layer 3), this is known OSI(open system interconnection in communication system) master pattern low three layers.

Below, will the chain of command of the wireless protocols among Fig. 2 and user's face of the wireless protocols among Fig. 3 be described respectively.

In layer 1, physical layer 225-245,325-345 provide information transfer service with one or more physical channels.Physical layer is connected to the MAC(medium access control that is positioned at physical layer top via one or more transmission channels) layer 224-244,324-344, and between MAC layer and physical layer, transmit data by transmission channel.And (such as the physical layer in the physical layer in the transmitter (transmitting terminal) and the receiver (receiving terminal)) transmits data via one or more physical channels between each different physical layer.

In layer 2, the MAC layer comes to as high-rise RLC(Radio Link control via one or more logic channels) layer 223-243, a 323-343 provide service.The reliable transfer of data of rlc layer support.PDCP(PDCP in the layer 2) layer 322-342 carries out header compression function, in order to reduce to include the header size of Internet protocol (IP:Internet Protocol) grouping of relatively large and unnecessary control information, thereby can on the wave point of bandwidth less, effectively send IP grouping (such as the IP grouping of IPv4, IPv6 etc.).And the PDCP layer is used for carrying out the coding to chain of command (C-plane:control plane) data (such as RRC message).The PDCP layer is also carried out the coding to user's face (U-plane:user plane) data.

Be arranged in the RRC(Radio Resource control of layer 3 topmost portion: Radio Resource Control) a layer 222-242 only is defined in chain of command, and rrc layer is responsible for the configuration of radio bearer (RB), is reconfigured and discharge explicitly logic channel, transmission channel and physical channel are controlled.Herein, " radio bearer " provided, is used for to transmit the service of data between portable terminal and E-UTRAN by layer 2.

Below, will explain the RACH(Random Access Channel) various aspects.The RACH channel is used for sending the relatively short data of length via up link.Specifically, to when not receiving signaling message that portable terminal that dedicated radio resources distributes sends by up link or user data, use RACH, perhaps when existing, when the RACH process should indicating mobile terminal be carried out in the base station, also use RACH.

As mentioned above, two critical pieces of formation E-UTRAN are base station and portable terminal.The Radio Resource of single subdistrict comprises uplink radio resources and downlink radio resource.Uplink radio resources and the downlink radio resource of residential quarter is responsible for distributing and controlling in the base station.That is to say the base station determines which portable terminal to carve at a time which kind of Radio Resource of use by.For example, when from now on 3.2 seconds are determined in the base station, will distribute to user 1 from the frequency of 100MHz to 101MHz, continue 0.2 second, to be used for downlink data transmission.And, the base station make this determine after, these situations can be informed corresponding portable terminal, so that this portable terminal downlink data receiving.Similarly, the base station can determine certain portable terminal should be when with which kind of Radio Resource of how many amounts carries out transfer of data by up link, and portable terminal is determined to inform with it in the base station, thereby so that portable terminal utilizes determined Radio Resource to send data in the determined time period.

If the base station then can the effective use Radio Resource with the dynamical fashion managing radio resources.Usually, single mobile terminal uses single Radio Resource continuously during call connection.Consider that nearest business is based on the IP grouping, this is not preferred.Reason is that most Packet Services are during call connection and generate discontinuously grouping, and do not carry out any transmission in a lot of time periods during calling out.In addition, be poor efficiency with the Radio Resource continuous dispensing to single mobile terminal.For addressing this problem, the portable terminal of E-UTRAN system has only used when having business datum just the method to the portable terminal distributing radio resource.

In more detail, for effective use Radio Resource in the LTE system, the base station should know that each user wishes data type and the data volume that sends.Downlink data is to send the base station to from IAD.Therefore, the base station knows to transmit how many data to each user by down link.On the contrary, for upstream data, if the information notification base station that portable terminal itself will be not relevant with the data that transmit by up link, then the base station can not learn how many Radio Resources each portable terminal needs.Therefore, in order to make the base station uplink radio resources is suitably distributed to portable terminal, each portable terminal should be provided for to the base station so that the necessary information of wireless resource scheduling is carried out in the base station.

For this reason, when portable terminal has data to send, this situation is informed the base station, and the base station is transmitted resource allocation message (perhaps use some other notification means) to portable terminal based on this information.

In above process, that is, when portable terminal had data to send, when this situation was informed the base station, the data volume of storing in the buffering area of portable terminal with it was informed the base station.This is that mode by Buffer Status Report (BSR) or some other buffer states (perhaps situation (state)) information realizes.

Yet, form with MAC control element (CE:control element) generates Buffer Status Report, this MAC control element is included in MAC PDU(protocol Data Unit) in (the perhaps data cell of other type or transmission block), and send to the base station from portable terminal.That is to say, need uplink radio resources to send Buffer Status Report (BSR).This means the uplink radio resource assignment solicited message that needs to send for sending BSR.When generating BSR, if there is the uplink radio resources of having distributed, then portable terminal sends BSR with this uplink radio resources immediately.This process that sends BSR from portable terminal to the base station is called " BSR process ".

Below, explain MAC PDU structure with reference to Fig. 4 to Fig. 8, wherein, Fig. 4 to Fig. 8 show by the MAC entity (such as 224 among Fig. 2 and 244 or Fig. 3 in 324,344) the various example MACPDU forms that use.

Fig. 4 illustrates the example PDU form that is used by the MAC entity.Whether LCID field indication MAC SDU or MAC control element (CE) be relevant therewith.If relevant with MAC SDU, then which logic channel this indication MAC SDU belongs to, and if relevant with MAC CE, then this indicates kind or the type of MAC CE.The L field is informed the size about the MAC SDU of MAC SDU.The E field informs whether there is any other MAC sub-header.In said process, if corresponding MAC SDU or the size of MAC CE are 127 or less, then use the L field of 7 bits, otherwise use the L field (as shown in Figure 5) of 15 bits.And the MAC SDU that comprises among the MAC PDU is arranged in the last of data field that MAC PDU comprises, and uses relevant MAC sub-header as shown in Figure 6.Alternatively, for fixed-size MAC CE, then use MAC sub-header as shown in Figure 6.In other situation, use MAC sub-header as shown in Figure 5.

Fig. 7 and Fig. 8 illustrate the format sample of BSR report.Depend on the quantity of the logic channel group with data and depend on that the free space among the MAC PDU is big or small, can use short BSR or long BSR.Lack the relative length that BSR and long BSR refer to BSR herein.Therefore, can represent such BSR with other similar term.For example, short BSR can be called " BSR brachymemma or that shorten ", and long BSR can be called " BSR expansion or that prolong ".

Referring again to Fig. 4 to Fig. 6, with each field of using in the key-drawing.

Mac header has variable-size, and is comprised of following a plurality of fields:

-LCID: the logic channel id field, it identifies respectively the type of the logic channel example of corresponding MACSDU, corresponding MAC control element for DL-SCH and UL-SCH or fills, as illustrating at table 1 with below the table 2() in explanation.Each MAC SDU, MAC control element or filling for comprising among the MAC PDU have 1 LCID field.In addition, when the filling of the single byte of needs or two bytes, but can not when filling to realize in the end of MAC PDU, comprise one or two additional LCID fields among the MAC PDU.The size of LCID field is 5 bits;

-L: length field is indicated corresponding MAC SDU or the length of MAC control element according to byte.Except last sub-header and the sub-header corresponding with fixed-size MAC control element, there is 1 L field for each MACPDU sub-header.Size by F field indication L field;

-F: the size of format fields indicating length field.Except last sub-header and the sub-header corresponding with fixed-size MAC control element, there is 1 F field for each MAC PDU sub-header.The size of F field is 1 bit.If the size of MAC SDU or MAC control element is less than 128 bytes, the value that then UE should the F field is set to 0, otherwise UE should it be set to 1;

-E: extended field is whether the indication mac header exists the more mark of multiword section.The E field is set to " 1 " and represents other group at least R/R/E/LCID field.The E field is set to " 0 " and is illustrated in next byte and begins MAC SDU, MAC control element or filling;

-R: reservation bit is set to " 0 ".

Mac header is aimed at (octet aligned) with these sub-headers according to eight tuples.

Below, in following table, explain information about the value of using among the LCID for DSCH Downlink Shared Channel (DL-SCH) and Uplink Shared Channel (UL-SCH).

[table 1]

Value for the LCID of DL-SCH

Index	The LCID value
		00001-xxxxx	The sign of logic channel
xxxxx-11011	Keep
		11100	The UE competition solves sign
11101	Timing advance
		11110	The DRX order
11111	Fill

[table 2]

Value for the LCID of UL-SCH

Index	The LCID value
		00001-yyyyy	The sign of logic channel
yyyyy-11010	Keep
		11011	Power headroom reporting (POWER HEADROOM REPORT)
11100	C-RNTI
		11101	Short Buffer Status Report
11110	Long Buffer Status Report
		11111	Fill

Below, will explain the exemplary method of MAC entity structure MAC PDU.

When a plurality of radio bearers (RB) being multiplexed into single transmission channel and sending, MAC layer in (can support LTE's) portable terminal uses the following rule about the Radio Resource that provides for each transmission time, so that definite data volume that will send.

1) at first, for the transmission channel after multiplexing, priority of logical channels (LCP:Logical Channel Priority) based on each logic channel is determined transmitted data amount according to descending, and according to determined data volume, utilizes the data of logic channel to construct MAC PDU.

2) if remained any Radio Resource, then repeat above step 1), so that for multiplexing transmission channel, determine transmitted data amount based on the priority of logical channels (LCP) of each logic channel according to descending.

Herein, the LCP of current discussion is defined as from 1 to 8,1st, and is highest and 8 are lowermost level.Yet, in discussing in the future, may change concrete definition.And, in said process, if need to send any MAC CE(control element), then at first this MAC CE is included among the MAC PDU.

In at least a in following multiple situation, portable terminal can be carried out the triggering to the BSR process:

When a) initial, all buffering areas do not comprise any data, but when data arrive particular buffer recently (BSR of routine);

B) when data arrive buffer empty, and, when in this buffering area, having the priority of logic channel of data before the priority of the logic channel relevant with this buffering area is higher than (BSR of routine);

C) when cell change (conventional BSR);

When d) after the last transmission of BSR, having pass by special time (periodic BSR); And

E) if in the MAC PDU that constructs, remained any available space (filled type BSR).

In above-mentioned triggering situation, if because last a kind of situation causes triggering BSR, then such BSR is called filled type BSR.Portable terminal namely, is constructed MAC PDU according to the size of MAC PDU according to the amount of radio resources from base station assigns.Herein, for each logic channel of setting up for portable terminal, the data that the MAC entity of portable terminal will be stored in (a plurality of) buffering area of logic channel comprise (perhaps inserting) successively in MAC PDU.Even if comprised (insertion) about the total data of each logic channel storage, when still having remained any free space among the MAC PDU, then trigger the BSR process, and, therefore the filled type BSR that triggers covered be used among the MAC PDU constructing, and send it to the base station.

Yet, in some cases, owing to the decline of filling the BSR produce and be positioned at MAC PDU.That is to say, the MAC entity utilize each logic channel data configuration after the MAC PDU, if remained any space among the MACPDU, then comprise in addition (insertion) BSR at MAC PDU rear portion.This is shown in Figure 9.

In Fig. 9, suppose that portable terminal receives to construct size and is the allocation of radio resources of the MAC PDU of X+N byte from the base station.Herein, based on the data about each logic channel storage, the MAC entity begins to fill MAC PDU and is used for constructing.In Fig. 9, Fig. 9 (a) illustrates the situation that filling occurs when utilizing the total data of storing in its buffering area to construct MAC PDU by the MAC entity.If the size of filling is greater than the size of BSR, then the MAC entity adds the fill area with BSR.

As seen from Figure 9, do not comprised this situation of filled type BSR owing to not informing owing to filling to the receiver that receives MAC PDU, so this receiver can not effectively use BSR information herein.That is to say that this receiver can not be learnt (a) that received among Fig. 9 or in the MAC PDU form (b) which, even thereby MAC PDU comprise BSR, the base station can not utilize this BSR information to carry out suitable allocation of radio resources.

And, in some cases, in order to send filled type BSR, for the reduction of the amount of user data that comprises among the MAC PDU, may have some problems.

Figure 10 illustrates portable terminal and receives structure size and be the example of the instruction of the MAC PDU of L+M+3 byte.In Figure 10, the part that is designated as remaining space is the fill area, and its length is shown is 2 bytes., because short BSR is 1 byte, short BSR can be inserted in the remaining space so portable terminal is definite herein, therefore, trigger filled type BSR.Yet, when the MAC entity attempts to insert short filled type BSR, go wrong.For example, as seen from Figure 10, do not comprise the L field in the MAC sub-header of RLC PDU N.But, if in said process in the time will inserting filled type BSR, then RLC PDU N will no longer be last element that comprises among the MAC PDU.Therefore, in some cases, in the MAC sub-header of MAC SDU that is not last element, must comprise the L field.Therefore, owing to force to insert filled type BSR, following mistake may occur.

That is to say that from Figure 11 as seen, in 2 bytes of remaining space, 1 byte is used for filled type BSR, and the MAC sub-header only there is 1 byte to be used for additional purpose.Yet, if RLC PDU N needs the L field of 2 bytes, make a mistake.Therefore, in order to construct suitable MAC sub-header, need to remove 1 byte part of RLC PDU.

The invention provides when triggering filled type BSR by the MAC entity and be used for filled type BSR is comprised or being inserted into detailed process and rule among the MAC PDU in effective mode.Various example embodiment of the present invention below will be described.

The first execution mode

Filled type BSR is comprised (or insertion) to the back-page position that is not MAC PDU.When triggering filling BSR process, filled type BSR can be inserted into the last position of last position among the MAC of MAD PDU SDU or MAC CE.Therefore, the MAC sub-header relevant with filled type BSR with MAC SDU, MAC CE can be set according to same order.When triggering filling BSR process, filled type BSR can be comprised (perhaps inserting) to the front of other MAC SDU of MAC PDU.Therefore, the MAC sub-header relevant with filled type BSR can also be set according to same order.When triggering filling BSR process, filled type BSR can be comprised (perhaps inserting) to the back of other MAC SDU of MAC PDU.Therefore, the MAC sub-header relevant with filled type BSR can also be set according to same order.

When structure MAC PDU, after the MAC sub-header that uses MAC SDU, MAC CE and their to be correlated with is inserted MAC PDU, if exist size to equal at least any remaining space of the summation of short BSR, long BSR and their MAC sub-header, then will lack BSR, long BSR and their MAC sub-header and comprise (perhaps inserting) to MAC PDU.In this process, MAC filled type BSR can be included in the front of MAC SDU or the MAC CE of MAC PDU.The MAC sub-header relevant with MAC filled type BSR can be included in the foremost of whole MAC sub-headers of MAC PDU.

The present invention proposes, and when triggering filled type BSR, the MAC entity is considered the size of relative MAC sub-header.That is to say when structure MAC PDU, the MAC entity considers whether MAC PDU has any packing space, with the size of considering BSR and the size of its correlator header.For example, if short BSR size is that 1 byte and its correlator header size also are 1 bytes, then also consider the size of this sub-header, thereby only when the remaining space of MAC PDU is 2 bytes or more byte, just trigger the BSR process (short BSR).And, in this case, only when can other MAC SDU of appropriate structuring and during the sub-header of MAC CE, just trigger filled type BSR.Herein, " suitable structure " refers to following situation: comprise the MAC sub-header that does not have the F/L field for the MACCE that does not need the L field; Comprise for all the other MACSDU except MAC CE or the MAC sub-header that has the F/L field for last the MAC SDU that requires the L field; And comprise the MAC sub-header that does not have the F/L field for last MAC SDU.

In said process, after having constructed MAC PDU, and after when having specific remaining space, having triggered filled type BSR, BSR is comprised (insertion) in MAC PDU, and think that this BSR is conventional BSR.Therefore, process filled type BSR in the mode identical with processing conventional BSR.That is to say that in this case, the restriction of the placement configurations of filled type BSR is identical with conventional BSR placement configurations restriction.

In said process, when triggering filling BSR process owing to filling, specifically, when because filled type BSR and will lack BSR when being included among the MAC PDU, short BSR comprises the buffer information of the logic channel group relevant with the logic channel that has limit priority in the logic channel of setting up for this portable terminal (having buffered data).

The second execution mode

The present invention proposes, when causing BSR to trigger owing to filling, the LCID field be used for directly (or clear and definite) inform the BSR that is included among the MAC PDU, thereby receiver can be determined easily and learn BSR and is included in this situation among the MACPDU (especially when causing being included in BSR among the MAC PDU owing to filling).More particularly, proposed to indicate whether to have comprised BSR with the MAC sub-header.

With reference to Figure 12, Figure 12 (a) illustrates as MAC PDU and comprises when filling, and based on the size of filling, receiver can be known and comprised filled type BSR.In Figure 12 (b), even owing to filling when causing being included in BSR among the MAC PDU, the MAC sub-header that will have the one group LCID field relevant with the BSR that comprises is inserted among the MAC PDU, thus directly (or clearly) inform and have BSR.

According to other method of the present invention, when BSR is comprised among the MAC PDU and when exist filling for MAC PDU, receiver thinks that BSR is filled type BSR.

In said process, when causing filled type BSR to trigger owing to filling process, and the result, when BSR being included among the MAC PDU, the independent LCID different from the LCID that distributes can being appointed as and indicating short BSR or long BSR.That is to say that if when causing filled type BSR to trigger owing to filling BSR is included among the MAC PDU, then portable terminal arranges LCID field (this LCID field is independent appointment) in the MAC sub-header relevant with this BSR.

The 3rd execution mode

With reference to comprising Figure 13 (a) and (b) and Figure 13 (c), when MAC PDU constructed according to the invention, the MAC entity of transmit leg (perhaps transmitting terminal) obtains the data and the MAC control element that send from each logic channel, they are comprised (insert or insert) in MAC PDU, and, if MAC PDU has remained the space of 2 bytes, then this remaining space is for the treatment of filled type BSR.Below explanation utilizes the various application of this concept.

In the present invention, when structure MAC PDU, the MAC entity of transmit leg obtains the data and the MAC control element (CE) that send from each logic channel, they are comprised (insert or insert) in MAC PDU, and, if MAC PDU has remained the space of 2 bytes, then comprise the remaining space that a plurality of filling headers (each fills header length is 1 byte) are inserted MAC PDU.

In the present invention, when structure MAC PDU, the MAC entity of transmit leg obtains the data and the MAC control element (CE) that send from each logic channel, they are comprised (insert or insert) in MAC PDU, and, if MAC PDU has remained the space of 2 bytes, then insert this 2 byte spaces, so that the L field is included in last MAC sub-header.

In the present invention, when structure MAC PDU, the MAC entity of transmit leg obtains the data and the MAC control element (CE) that send from each logic channel, they are comprised (insert or insert) in MAC PDU, and, if MAC PDU has remained the space of 2 bytes, then comprise filled type BSR(namely, for the BSR of 1 byte of MAC sub-header) and the short BSR of 1 byte in order to insert the remaining space of MAC PDU.

Should be noted that and can also be in a comparable manner carry out said process for the MAC PDU of the remaining space of any amount byte (not only have 2 bytes but also have such as 4 bytes).

The 4th execution mode

When sending MAC PDU as base station structure MAC PDU and to portable terminal, if after having constructed MACPDU, generate packing space, then can in MAC PDU, comprise order (that is, the TAC(timingalignment command) order of regularly aiming at).Can order to adjust its transmit timing on up link with this TAC by portable terminal.For example, 2 bytes after having constructed MAC PDU, have been remained among the MAC PDU, then 1 byte can be distributed for the sub-header of TAC order in the base station, and distributes in addition 1 byte for TAC order itself (the TAC order provides time-of-the-day order to adjust its transmission on up link to portable terminal).And even remained the packing space of 1 byte, then the base station does not comprise relevant MAC sub-header, but is included in TAC order among the MAC PDU and sends.

The 5th execution mode

If portable terminal has determined to exist packing space, and attempt to trigger filled type BSR, rule then is provided more accurately, if so that in fact filled type BSR can not be included among the MAC PDU, then prevent from triggering filled type BSR.Therefore in the present invention, when portable terminal is constructed MAC PDU with MAC CE and MAC SDU, portable terminal checks remaining space by the size of obtaining byte of padding, wherein, the size of byte of padding is the big or small summation that the size of MAC PDU deducts MAC SDU, MAC CE and their MAC sub-header.In this calculated, for last element that comprises among the MAC PDU (that is, last MAC SDU), portable terminal hypothesis L field was included in the MAC sub-header relevant with this MAC SDU.If last element is MAC CE, and if this MAC CE have variable size, then portable terminal hypothesis L field is included in the MAC sub-header relevant with this MAC CE, and carries out this calculating.That is to say, suppose that the MAC sub-header for last element is " R/R/E/LCID/F/L ", and calculate the size for the filling bit of this MAC PDU.And the size that only is equal to or greater than BSR when the byte of padding size just triggers filled type BSR during with the big or small summation of its relevant MAC sub-header.

That is to say, when calculating byte of padding and count, in this calculates, comprise (a plurality of) F/L field in (a plurality of) MAC sub-header relevant with whole MAC SDU of comprising among the MAC PDU.Herein, even for the MAC CE with variable-size, also calculate by the F/L field that in calculating, comprises in the MAC sub-header relevant with MAC CE.Therefore, only when the byte of padding number is equal to or greater than BSR and relative MAC sub-header sum, just trigger filled type BSR.

The 6th execution mode

Reference comprises Figure 14 (a) and Figure 14 (b) and comprises Figure 15 (a) and (b) and Figure 15 (c), when structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if the remaining space of 2 bytes is arranged among the MAC PDU, if and comprised short BSR among the MAC PDU, then the present invention proposes, and utilizes long BSR to replace short BSR.Therefore as shown in figure 14, in MAC PDU, comprise long BSR rather than short BSR.

And, when structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if the remaining space of 4 bytes is arranged among the MAC PDU, the remaining space of these 4 bytes is used for filled type BSR, specifically, use long BSR.Herein, these 4 bytes comprise that 1 byte MAC sub-header, 1 short BSR of byte and 2 bytes are used for filling.

When structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if MAC PDU has comprised BSR, if then also have any remaining space among the MAC PDU, also one or more additional BSR can be inserted among the MAC PDU.

And, when structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if MAC PDU has comprised BSR, if and also had any remaining space among the MAC PDU, filled type BSR then would not do not triggered.

In addition, when structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if also have any remaining space among the MAC PDU, if and triggered periodic BSR or conventional BSR, then in maximum sized filled type BSR and the BSR that triggered, only insert maximum BSR.

In addition, when structure MAC PDU, the MAC entity of transmitter (transmitting terminal) is inserted in MAC PDU from the data of each logic channel and MAC CE, if triggered periodic BSR or conventional BSR, does not then trigger filled type BSR.

About effect of the present invention, when portable terminal structure MAC PDU, if there is any remaining space among the MAC PDU, then provide the method for this remaining space of a kind of effective use, in order to improve availability and the efficient of Radio Resource.

Below with the more details of explaining about concept of the present invention and feature.

Details 1

Can comprise filled type BSR in other place (position) before last sub-header of MAC.That is to say, in transmission block (TB), inserted after sub-header and relevant MAC SDU or other MAC control element, when filling has 2 byte-sized, comprise the short BSR of 2 bytes.For example, if can remove by the square filling, then the first sub-header is short BSR.

That is to say that inserted after sub-header and relevant MAC SDU or other MAC control element, when filling had 2 byte lengths, last sub-header of MAC SDU can comprise " L " field of 2 bytes in TB.That is to say, can use the F field of indication " long L " field and " 15 bit L fields ".When the MAC sub-header being decoded, when the summation of group header size and the size of relevant MAC control element or relevant MAC SDU just in time equals TB (suppose get rid of hangover 1-7 bit), reception MAC entity is thought and is no longer included sub-header at every turn.This situation is not considered as wrong situation.That is to say that if need not just in time adaptive TB of byte of padding/LCID, then last MAC sub-header can comprise " L " field.

Details 2

Except the filling that requires single byte or two bytes, but can not be when filling to realize in the end of MAC PDU, fill in the end of MAC PDU.

When the filling that requires single byte or two bytes, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill one or two corresponding MAC PDU sub-headers; Perhaps, if there is no this sub-header then inserted one or two MAC PDU sub-headers corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

For FDD, when data add that TB size that the size of header is less than or equal to the E-TFC that is selected by UE deducts 24 bits (this is to cause owing to the quantification in the transmission block size that can be supported or the triggering of schedule information), should be in the additional DDI value [111111] of the end of MAC-e header, and schedule information should be concatenated among this MAC-e PDU, wherein, DDI value [111111] represents to be connected in series schedule information among this MAC-e PDU.Otherwise, if these data add when TB size that the size of header is less than or equal to the E-TFC that is selected by UE deducts 18 bit, schedule information should be concatenated among this MAC-e PDU.In what its situation in office, thinking that other MAC-es PDU or schedule information are not adaptive, therefore, need to not be extra DDI field retaining space in transmission block.

That is to say, in the situation of HSUPA, in order to determine to comprise what content or when stop to insert MACTB, transmitter continues mac header is added that the size of MAC data and available transmission block size compare, like this, in some cases, can add schedule information and need not to indicate any field that has schedule information.Therefore, can omit some header fields such as DDI, thereby raise the efficiency.

But current LTE MAC standard does not illustrate this generic operation.Therefore, for whether forbidding the HSUPA operation, problem has appearred.Figure 13 shows this problem.

In Figure 13 (a), remaining two bytes have been exhausted owing to comprising 2 padding sub-headers.In Figure 13 (b), substitute this two bytes with " F " and " L " field.Therefore, last sub-header also comprises " F " and " L " field.Also adopt similar approach among the HSUPA.That is to say that the summation by sub-header being added data field and the size of transmission block (TB) compare, receiver can not learnt and fill.In Figure 13 (c), substitute these two bytes with short BSR.In fact, lacking BSR is not empty Buffer Status Report.Shown in Figure 16 for the useful situation of Figure 13 (c).

As shown in figure 16, fill the existence of LCID not to whether still having data to distinguish in the buffering area of UE.In order to assist efficiently the eNB scheduler, think that method (c) ratio method (a) among Figure 13 is better.That is to say, be not to waste 2 bytes by filling LCID, and it is more meaningful that these 2 bytes are used for short BSR.

Referring again to Fig. 4 to Fig. 6, will provide MAC PDU(DL-SCH and UL-SCH) explanation.

MAC PDU comprises mac header, zero or more Medium Access Control (MAC) Service Data Unit (MAC SDU), zero or more MAC control element, and comprises alternatively filling; As shown in Figure 4.The two has variable size mac header and MAC SDU.MAC PDU header comprises one or more MAC PDU sub-headers; Each sub-header corresponds respectively to MAC SDU, MAC control element or filling.In some embodiments, occurring in MAC PDU not for the MAC PDU sub-header of filling should be more than once.

Last sub-header in MAC PDU and the fixed-size MAC control element, the MACPDU sub-header comprises six header fields R/R/E/LCID/F/L.Last sub-header among the MAC PDU and the sub-header of fixed-size MAC control element only comprise four header fields R/R/E/LCID.Subsequently, the MAC PDU sub-header corresponding with filling comprises four header fields R/R/E/LCID.

MAC PDU sub-header has with corresponding MAC SDU, MAC control element and fills identical order.Except filled type BSR, the MAC control element is arranged on before any MAC SDU all the time.End at MAC PDU carries out filled type BSR.Except when require single byte, but outside can not be when filling to realize in the end of MAC PDU, fill in the end of MAC PDU.When require single byte, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill a corresponding MAC PDU sub-header; Perhaps, if there is no this sub-header then inserted a MAC PDU sub-header corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.In MAC PDU, insert MAC SDU or MAC control element (except BSR) afterwards when residue during two bytes, then comprise short BSR.

In some embodiments, can send at most a MAC PDU by the every TB of every UE.And, depend on physical layer classification, can send one or two TB by the every TTI of every UE.

Should be noted that this MAC PDU is only applicable to DL/UL SCH or also is applicable to other transmission channel is FFS.

Details 3

The specific remaining space that exists in MAC PDU is equal to, or greater than the size of BSR, then comprises filled type BSR.If distributed up link (UL) resource and filling bit number greater than Buffer Status Report MAC control element, following this BSR is called " filled type BSR " then.But for how to explain filled type BSR, need to address the problem: MAC control element (except filled type BSR) is positioned at before any MAC SDU all the time.Except when require single byte or two bytes fill, but outside can not be when filling to realize in the end of MAC PDU, carry out filled type BSR in the end of MAC PDU, and fill in the end of MAC PDU.The two all carries out filled type BSR and filling in the end of MAC PDU.Yet, to indicate clearly filled type BSR or impliedly indicate filled type BSR by filling LCID by BSR LCID, or filled type BSR is positioned at after the filling or filling is positioned at after the filled type BSR, and these all are some problems that solve by the present invention.

How to indicate filled type BSR(4 proposal)

Figure 17 illustrates how to indicate the two kinds of possible realizations (with reference to Figure 17 (a) and Figure 17 (b)) that have filled type BSR.

In Figure 17 (a), depend on the size of fill area, can comprise short BSR or long BSR and need not the correlator header.In Figure 17 (a), as long as the size of filling is equal to or greater than 2 bytes, can comprise BSR.In the method, if also remain 3 bytes after in MAC PDU, having inserted (a plurality of) other sub-header or MAC SDU/CE, then can comprise BSR.

In Figure 17 (b), last 2 MAC sub-headers are BSR sub-header and padding sub-header, thereby clearly indicate filled type BSR.In the method for Figure 17 (b), when after in MAC PDU, having inserted (a plurality of) other sub-header or MAC SDU/CE, also remaining 4 bytes, then can comprise BSR.

That is to say the difference between Figure 17 (a) and two kinds of methods of Figure 17 (b) is what to be used to the least residue byte number that comprises BSR.

Propose 1

Proposed to determine to indicate filled type BSR with clear and definite method or implicit method, and the order between consideration filled type BSR and the filling.

Figure 17 is illustrated in shown in Figure 12 (a) in the situation of using implicit indication two kinds of possible realizations about the location of filled type BSR.Any method all is effective.In Figure 17, be appreciated that BSR can be arranged on for before the byte of filling or afterwards.

Figure 18 is illustrated in shown in Figure 12 (b) in the situation of using clearly indication two kinds of possible realizations about the location of filled type BSR.These two kinds of solutions are all based on " E " field.If " E " field is indicated other MAC sub-header, then receiver is only to the decoding of next byte, with learn subsequently what is.But in method (b), when the BSR LCID that detects after filling LCID, the MAC receiver among the eNB can be immediately to last byte decoding, to learn the buffer state of UE.On the other hand, in method (a), when detecting BSR LCID, the MAC receiver among the eNB at first needed to calculate the original position of BSR before first byte decoding to BSR.

Propose 2

Proposed to determine that filled type BSR is that last or filling are last in MAC PDU.

Propose 3

When in MAC PDU, inserting MAC SDU or MAC CE(except BSR) when also remaining 2 bytes afterwards, should transmit short BSR with these 2 bytes.

Simultaneously, if after BSR being included among the MAC PDU, remained two bytes, then can consider the situation among situation among Figure 19 (after having comprised short BSR, remaining the situation of 2 bytes) and Figure 20 (in the situation of clear and definite filled type BSR indication, after having comprised long BSR, remaining the situation of 2 bytes).

Figure 19 (a) is illustrated in will lack the situation that BSR remains 2 bytes after covering among the MAC PDU.This situation means remained at first 4 bytes among the MAC PDU after only having inserted from the data of each logic channel.In other words, in MAC PDU, inserted after the RCL PDU, before comprising short BSR, also had 4 bytes to use.No matter whether have other data in the RLC entity, these 4 bytes are initial byte of paddings.Then, should comprise long BSR rather than short BSR.Therefore, should use Figure 19 (b) rather than use Figure 19 (a).

Figure 20 (a) is illustrated in and comprises the situation that long BSR remains 2 bytes afterwards.This means and after having inserted from the data of each logic channel, remained at first 6 bytes among the MAC PDU.In other words, in MACPDU, only inserted after the RCL PDU from the upper strata, also had 6 bytes to use.For this situation, three kinds of situations are arranged:

1. if do not have remaining data in each RLC entity, then these 6 bytes are initial byte of paddings, should cancel this BSR, perhaps should comprise normal filled type BSR.In this case, if use clearly indication for filled type BSR, then will adopt Fig. 4 (b) and (c) rather than (a).If use implicit indication for filled type BSR, then will adopt Fig. 5 (b) and (c) rather than (a).

2. if after having inserted MAC PDU, only there is a logic channel to have data, then must trigger short BSR, and remaining 4 bytes must be used for comprising the data of this logic channel.

3. have data if after having inserted MAC PDU, surpass a logic channel, in any case then should comprise long BSR.Some is strange but this situation seems, because will adopt Figure 20 (b) and Figure 20 (c) in the situation of using clearly indication for filled type BSR.And, using in the situation of implicit indication for filled type BSR, will adopt Figure 21 (b) and Figure 21 (c) (in the situation of implicit filled type BSR indication, after comprising long BSR, remaining the situation of 2 bytes).

Therefore, the situation of two byte padding sub-headers may be also not obvious, and be not useful all the time.And because current MAC structure can be avoided the filling of two bytes, so should not there be the padding sub-header of two bytes.

Propose 4

Should avoid the padding sub-header of two bytes of mac header inside.

Details 4

For this network, specific concept of the present invention can be described in the following manner:

ENB by utilize in the RLC/PDCP buffering area for a UE can with data and by utilizing in addition the MAC control element, form MAC PDU.

Utilizing after MAC SDU/MAC CE inserts MAC PDU:

If-after inserting MAC PDU, remain two bytes,

--then eNB covers timing alignment command (TA CMD) among the MAC PDU, substitutes these two bytes.

---in this case, comprise the sub-header of TA CMD with a byte, and

----comprise with a byte actual value of timer command.

If-after inserting MAC PDU, remained above two bytes,

--then eNB covers TA CMD among the MAC PDU, substitutes these at least two bytes.

---in this case, comprise the sub-header of TA CMD with a byte, and

----comprise with a byte actual value of timer command.

-----and use at least one byte as for the sub-header of filling.

-or, surpass two bytes if after inserting MAC PDU, remained,

---in this case, comprise the actual value of timer command with a byte.

----and use a byte as the sub-header for filling.

-----and use other a plurality of bytes as filling.

---perhaps, replace the filling of a byte with TA CMD.

For this portable terminal, specific concept of the present invention can be described in the following manner:

UE decodes the MAC PDU that receives/repack and is MAC SDU and/or MAC CE.

-UE is to each sub-header and the MAC SDU/CE that is associated with this sub-header decoding

--UE calculates the big or small summation of sub-header and MAC SDU/CE

--UE should the size summation compare with the size of MAC PDU

If-indicate the size (except padding sub-header) of filling and filling to be equal to or greater than 1 byte,

--then UE thinks that TA CMD is included among the filling part.

Details 5

For up direction, current MAC code requirement, if packing space allows to comprise BSR, then UE should comprise BSR.Considering needs two bytes to comprise short BSR, then as long as the residue packing space is two bytes, just BSR is included among the MAC PDU.

In Figure 22, because 2 bytes enough comprise short BSR, the situation of Figure 22 (a) will can not occur.If we abide by the intention of current standard, then UE should send the form of Figure 22 (b).

Therefore, do not need to carry out special processing according to the filling to two bytes of following explanation:

Except the filling that requires single byte or two bytes, but can not be when filling to realize in the end of MAC PDU, fill in the end of MAC PDU.When the filling of the single byte of needs or two bytes, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill one or two corresponding MAC PDU sub-headers; Perhaps, if there is no this sub-header then inserted one or two MAC PDU sub-headers corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

Mention in passing, the BSR among Figure 22 (b) can be called filled type BSR, because this BSR is because packing space and involved.Because BSR is not positioned at the end of MAC PDU, may be disputable, the current definition of this and filled type BSR is inconsistent.Yet filled type BSR needs not to be last element among the MAC PDU.In addition, utilize clear and definite LCID to indicate filled type BSR.Therefore, filled type BSR can be positioned at any position of MAC PDU inside.

In down direction, do not need BSR, the situation among the DL is different from UL.Therefore, in the DL direction, still require special processing that 2 bytes are filled.Because the size of timing advance order is 2 bytes, thus may be disputable, as long as 2 bytes of residue just can comprise TA CMD among the MAC PDU.It is useful sending more TA CMD, because this can remain on UE in the synchronous regime more of a specified durationly, but this has unnecessarily limited the action of eNB.

About further analysis, for the sake of security, we also need to consider to remain for the MACPDU that has comprised BSR the situation of 2 bytes.For short BSR this situation is shown among following Figure 23, for long BSR this situation is shown among Figure 24.

That is to say that if also remain 2 bytes for the MAC PDU that has comprised short BSR, then this means for BSR has 4 bytes to use.So, long BSR will replace short BSR.Therefore, will adopt Figure 23 (b) rather than Figure 23 (a).

That is to say that if also remain 2 bytes for the MAC PDU that has comprised long BSR, then this means for BSR has 6 bytes to use.So, 4 bytes will be for long BSR, and other 2 bytes will be for for last MAC SDU or fill the L field of LCID.Therefore, will use the form of Figure 24 (b) or Figure 24 (c) rather than the form of Figure 24 (a).

Details 6

Also with following statement feature of the present invention:

For filled type BSR:

If-filling bit number is equal to or greater than the size of short BSR but less than the size of long BSR, then report comprises the short BSR of LCG of the logic channel (having buffered data) of limit priority;

-otherwise, if the filling bit number is equal to, or greater than the size of long BSR, then report long BSR.

The location of filled type BSR

BSR among Figure 22 (b) is filled type BSR, because this BSR is because packing space and involved.But, because this BSR is not positioned at the end of MAC PDU, so, may be disputable, the current definition of this and filled type BSR is inconsistent.Yet filled type BSR needs not to be last element among the MAC PDU.In addition, utilize clear and definite LCID to indicate filled type BSR.Therefore, filled type BSR can be positioned at any position of MAC PDU inside.

If still mandatory requirement filled type BSR should be last element except filling among the MAC PDU, then this means and to use Figure 25 (b).

In Figure 25 (b), second MAC sub-header do not have " L " field.But because it is not last the MAC sub-header among the MAC PDU, Figure 25 (b) may be incorrect.

Clearly, has BSR than not have BSR better.Therefore, should use Figure 22 (b) rather than use Figure 25 (a) or Figure 25 (b).Therefore, should in no way limit BSR in the position of MAC PDU inside.

MAC control element (except filled type BSR) is positioned at before any MAC SDU all the time.End at MACPDU carries out filled type BSR.

Clearly, has BSR than not have BSR better.With regard to this respect, should use Figure 22 (b) rather than Figure 25 (a) or Figure 25 (b).The method of a kind of Figure 25 of avoiding (b) is any position that allows filled type BSR is arranged on MAC PDU inside.If allow like this, then the trigger condition of filled type BSR can be guaranteed, as long as there is the packing space of 2 bytes can be with just sending Figure 22 (b).

MAC PDU is according to the Bit String of byte alignment (that is, the multiple of 8 bits) on length.Can represent this Bit String with table (or row), wherein, the highest significant bit is the leftmost bit of the first row of this table, and minimum effective bit is the rightmost bit of last column of this table, more generally, from left to right then read this Bit String according to the order that reads of going.According to first and the highest significant bit is positioned at the most left bit and last and minimum effective bit is positioned at the rightest bit, represent the bit order of the parameters field of MAC PDU inside.

MAC SDU is according to the Bit String of byte alignment (that is, the multiple of 8 bits) on length.Begin forward SDU to be covered the MAC PDU from first bit.

MAC PDU sub-header has with corresponding MAC SDU, MAC control element and fills identical order.

Except filled type BSR, the MAC control element is arranged on before any MAC SDU all the time.Filled type BSR can be arranged on before any MAC SDU or any MAC SDU after.

In up direction, except when require single byte, but outside can not be when filling to realize in the end of MAC PDU, fill in the end of MAC PDU.

In down direction, except when need single byte or two bytes filling, but outside can not be when filling to realize in the end of MACPDU, fill in the end of MAC PDU.

In up direction, when the filling of the single byte of needs, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill a corresponding MAC PDU sub-header; Perhaps, if there is no this sub-header then inserted a MAC PDU sub-header corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

In down direction, when the filling of the single byte of needs or two bytes, but can not be when filling to realize in the end of MACPDU, before first MAC PDU sub-header corresponding with MAC SDU, insert one or two MAC PDU sub-headers corresponding with filling, perhaps, if there is no this sub-header then inserted one or two MAC PDU sub-headers corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

Can send at most a MAC PDU by the every TB of every UE.And, depend on physical layer classification, can send one or two TB by the every TTI of every UE.

Details 7

MAC PDU header comprises one or more MAC PDU sub-headers; Each sub-header corresponds respectively to MAC SDU, MAC control element or filling.Occurring in MAC PDU not for the MAC PDU sub-header of filling should be more than once.

Except filled type BSR, the MAC control element is arranged on before any MAC SDU all the time.End at MACPDU carries out filled type BSR.

Except when require single byte, but outside can not be when filling to realize in the end of MAC PDU, fill in the end of MAC PDU.

When the single byte of needs, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill a corresponding MACPDU sub-header; Perhaps, if there is no this sub-header then inserted a MAC PDU sub-header corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

Utilize MAC SDU or MAC control element (except BSR) insert MAC PDU after when residue during two bytes, comprise short BSR.

Can send at most a MAC PDU by the every TB of every UE.Depend on physical layer classification, can send one or two TB by the every TTI of every UE.

Details 8

The size that the filling bit number equals TB deducts the size of MAC SDU or MAC CE, deducts the size of their relevant MAC sub-headers again.In this calculates, suppose that the MAC sub-header of last MAC SDU comprises " R/R/E/LCID/F/L ".

Except filled type BSR, the MAC control element is arranged on before any MAC SDU all the time.Filled type BSR can be positioned at any position of MAC PDU inside.

For filled type BSR:

If-filling bit number is equal to, or greater than the size of long BSR, and long BSR is fitted among the MAC PDU, then the long BSR of report.

-otherwise if the filling bit number is equal to or greater than the size of short BSR, and short BSR is fitted among the MAC PDU, then report comprises the short BSR of LCG of the logic channel (having buffered data) of limit priority.

Details 9

Can consider two kinds of substitute modes:

Substitute mode 1

For filled type BSR:

The size that the filling bit number equals TB deducts the size of MAC SDU or MAC CE, deducts the size of their relevant MAC sub-headers again.In this calculates, if last MAC sub-header (except filling) for MAC SDU, supposes that then last MAC sub-header comprises " R/R/E/LCID/F/L ".

Substitute mode 2

For filled type BSR:

If-filling bit number is equal to or greater than the size of long BSR, and if can comprise F and L field for whole MAC sub-headers of the MAC SDU of MAC PDU inside, the long BSR of report then.

-otherwise, if the filling bit number is equal to or greater than the size of short BSR, if and could comprise F and L field for whole MAC sub-headers of the MAC SDU of MAC PDU inside, then report would comprise the short BSR of LCG of the logic channel (having buffered data) of limit priority.

Below, equivocal problem and solution thereof that explanation is possible.

Figure 26 (a) illustrates remaining space and enough comprises long BSR.But MAC PDU has comprised short BSR.According to current standard, when triggering a plurality of BSR, only a BSR is covered among the MAC PDU.Therefore, in Figure 26, allow a kind of among " weak point " and " routine " BSR or these two kinds of BSR of " length " and " filling " BSR.Similar problem shown in Figure 26 (b) and Figure 26 (c).

Therefore, do not know to comprise which BSR.That is to say whether " routine " or " periodically " BSR have higher priority than " filled type " BSR.Long BSR may should be selected as far as possible.The BSR that perhaps, may replace with long filled type BSR short routine.On the other hand, in order to alleviate implementation complexity, can also propose to allow in a MAC PDU, to occur a plurality of BSR.This is the another kind of method of eliminating this indefinite property.

Therefore, a kind of possibility solution as to above-mentioned a plurality of BSR situations can comprise a plurality of BSR in a MAC PDU, and the form of Figure 27 will substitute the form of Figure 26.

As another kind of possibility solution, UE can comprise a long BSR.That is to say that when UE consisted of MACPDU, UE was with remaining space and distributed to " routine " and the space of " periodically " BSR merges, to comprise long BSR.Figure 28 illustrates the situation of the MAC PDU when this solution is applied to problem shown in Figure 26.

Details 10

Importantly, scheduler can distinguish filled type BSR and the BSR of routine.If cancelled position limitation, then should use the independent LCID for filled type BSR.Should clearly indicate filled type BSR with padding sub-header herein.

If-filling bit number be equal to or greater than short BSR add it sub-header size but add the size of its sub-header less than long BSR, then report comprises the short BSR of LCG of the logic channel (having buffered data) of limit priority;

-otherwise, if the filling bit number is equal to, or greater than the size that long BSR adds its sub-header, then report long BSR.

Having the general rule of process filling may be simpler than introducing exception: with whether to comprise conventional BSR irrelevant, UE uses all the time identical rule and comprises filled type BSR.

If BSR has been included among the MAC PDU, then do not need other BSR.Other BSR may increase MAC to be processed.Repeat (populate) BSR field after having constructed PDU, therefore, these two BSR may be same copies.

If use short BSR, this means that then other three do not have the group of report not have buffered data.Therefore, lack BSR(" routine " or " periodically ") may hint whole groups buffer state.On the other hand, if use long BSR, then can also report whole groups buffer state.

Details 11

The type of the BSR that the needs consideration should comprise when triggering a plurality of BSR.

Even a plurality of events when can sending BSR, occur, also only there is 1 BSR to be included among the MACPDU.

For example, trigger short BSR and residue packing space when expiring owing to periodical timer when enough comprising long BSR, should determine the type of the BSR that will comprise.When having triggered conventional short BSR and packing space and only allow short BSR, can merge two short BSR BSR that grows up next life.May there be multiple solution for said circumstances:

Option A: when triggering conventional BSR or periodic BSR, do not trigger filled type BSR.Like this, can avoid triggering a plurality of BSR of different sizes.

Option B: in MAC PDU, can comprise at most among conventional BSR or the periodic BSR, and can comprise at most a filled type BSR.

Option C: if triggered conventional BSR or periodic BSR, and if also triggered filled type BSR, then comprise the maximum BSR that is fitted among the MAC PDU.

Because its simplicity, above-mentioned option A is the most practical.

Should be noted that several dissimilar BSR.When triggering a plurality of BSR, only comprise a BSR.

Yet, for when triggering a plurality of BSR, comprising any BSR aspect, still have problems.When triggering conventional BSR or periodic BSR, do not trigger filled type BSR.The MAC entity can not determine to comprise which BSR when triggering a plurality of BSR.

Come to provide the relevant information of data volume in the UL buffering area with UE for service eNB with the Buffer Status Report process.If there is in the following event any one, then should trigger Buffer Status Report (BSR):

-UL data have arrived in the UE transmit buffer, and the priority of the logic channel of the data that existed in the UE transmit buffer of the priority ratio of logic channel under these UL data is higher, and in the case, this BSR is hereinafter referred to as " conventional BSR ";

-distributed the UL resource, and the filling bit number is greater than the size of Buffer Status Report MAC control element, and in the case, this BSR is hereinafter referred to as " filled type BSR ";

-Serving cell changes, and in the case, this BSR is hereinafter referred to as " conventional BSR ";

-PERIODIC BSR TIMER expires, and in the case, this BSR is hereinafter referred to as " periodic BSR ".

For BSR routine and periodic:

If-in the TTI that sends BSR, only have a LCG to have buffered data: the short BSR of report;

-otherwise, have buffered data if in the TTI that sends BSR, surpass a LCG: report long BSR.

For filled type BSR:

If the BSR of-triggering routine or periodic BSR;

If the Buffer Status Report process has determined to have triggered BSR since last transmission BSR:

The UL resource of distributing if-UE has the new transmission of TTI for this reason:

-indication is multiplexing to generate BSR MAC control element with packing process;

-restart PERIODIC BSR TIMER.

-otherwise, if triggered conventional BSR since the last transmission BSR:

-then should trigger dispatch request.

Even should be noted that a plurality of events when can sending BSR, to occur, also only have a BSR can be included among the MAC PDU.

Can hold whole pending data, still be not enough in addition hold in the situation of BSR MAC control element in the UL mandate, should cancel pending BSR.

As mentioned above, each example embodiment of the present invention relates to the method and system of processing Buffer Status Report (BSR).When carrying out the BSR triggering, consider together size and the BSR size of necessary (a plurality of) sub-header.Like this, allow (a plurality of) sub-header is inserted (comprising) to MAC PDU(or transmission block (TB) or other data cell) in.

Utilize the Buffer Status Report process to come to provide the relevant information of the data volume that can be used for transmitting in the UL buffering area with UE for service eNB.For the Buffer Status Report process, UE should consider not to be suspended whole radio bearers of (suspend), and can consider the radio bearer hung up.

If there is in the following event any one, then should trigger Buffer Status Report (BSR):

-in RLC entity or PDCP entity, for the logic channel that belongs to LCG, the UL data can be used for transmission, and, the priority ratio of the logic channel under these data belong to any LCG's and data to have can be used for the priority of the logic channel that transmits higher, perhaps, in a plurality of logic channels that belong to LCG any one, do not have data to can be used for transmission, in this case, this BSR is hereinafter referred to as " conventional BSR ";

-distributed the UL resource, and the filling bit number is equal to or greater than the size of Buffer Status Report MAC control element, and in this case, this BSR is hereinafter referred to as " filled type BSR ";

-Serving cell changes, and in this case, this BSR is hereinafter referred to as " conventional BSR ";

-RETX_BSR_TIMER expires, and UE has the data that can be used for transmitting, and in this case, this BSR is hereinafter referred to as " conventional BSR ";

-PERIODIC_BSR_TIMER expires, and in this case, this BSR is hereinafter referred to as " periodic BSR ".

For BSR routine and periodic:

If-in the TTI that sends BSR, surpass a LCG and have the data that can be used for transmitting: then report long BSR;

-otherwise, the short BSR of report.

For filled type BSR:

The size that adds its sub-header less than long BSR if-filling bit number is equal to or greater than that short BSR adds the size of its sub-header:

If-in sending the TTI of BSR, surpass a LCG and have buffered data: then report comprises the BSR of brachymemma of LCG of the logic channel (having the data that can be used for transmitting) of limit priority;

-otherwise the short BSR of report.

-otherwise, if the filling bit number is equal to or greater than the size that long BSR adds its sub-header, then report long BSR.

If the Buffer Status Report process has determined to have triggered at least one BSR since last transmission BSR or if this is to have triggered at least one BSR for the first time:

-begin or restart PERIODIC_BSR_TIMER, unless BSR is the BSR of brachymemma;

If not operation of-beginning RETX_BSR_TIMER() if or restart RETX_BSR_TIMER(and move).

-otherwise, if triggered conventional BSR:

-should trigger dispatch request.

Even when a plurality of Event triggered when can send BSR during BSR, MAC PDU should comprise at the most MAC BSR control element, in the case, conventional BSR and periodic BSR should be more preferential than filled type BSR.

When receiving when UL-SCH transmits the mandate of new data, if should restarting RETX_BSR_TIMER(, UE moves).

UL authorize can hold the whole pending data that can be used for transmitting, but be not enough to hold in addition in the situation of BSRMAC control element, should cancel the BSR that all triggered.When BSR is included among the MAC PDU when transmitting, should cancel the BSR that all triggered.

Below, will explain that further MAC PDU(is except transparent MAC and the DL-SCH the accidental access response and UL-SCH).

MAC PDU comprises mac header, zero or more Medium Access Control (MAC) Service Data Unit (MAC SDU), zero or more MAC control element, and comprises alternatively filling; As shown in Figure 4.

The two has variable size mac header and MAC SDU.

MAC PDU header comprises one or more MAC PDU sub-headers; Each sub-header corresponds respectively to MAC SDU, MAC control element or filling.

The MAC control element is positioned at before any MAC SDU all the time.

Except when need single byte or two bytes filling, but outside can not be when filling to realize in the end of MAC PDU, carry out filled type BSR in the end of MAC PDU.Filling can have arbitrary value, and UE should ignore it.

When the filling of the single byte of needs or two bytes, but can not be when filling to realize in the end of MAC PDU, before first MAC PDU sub-header corresponding with MAC SDU, insert and fill one or two corresponding MAC PDU sub-headers; Perhaps, if there is no this sub-header then inserted one or two MAC PDU sub-headers corresponding with filling before last MAC PDU sub-header corresponding with the MAC control element.

Can send at most a MAC PDU by the every TB of every UE.

According to the present invention, for the MAC control element, there is Buffer Status Report MAC control element.

Buffer Status Report (BSR) MAC control element comprises with lower one:

The BSR form of-short BSR and brachymemma: the buffer size field (Fig. 7) of a LCG id field and a correspondence; Perhaps

-long BSR form: 4 buffer size fields, with LCG ID 0 to LCG ID 3 corresponding (Fig. 8).

Utilization has the MAC PDU sub-header of LCID and identifies the BSR form.

As give a definition LCG ID and buffering area size field:

-LCG ID: logic channel group id field identifies the group of (a plurality of) logic channel of having reported buffer state.The length of this field is 2 bits;

-buffer size: the buffer size field identification goes out after constructing MAC PDU data total amount available on whole logic channels of logic channel group.Indicate this data volume with byte number.This data volume should comprise the total data that can be used for the transmission in rlc layer and the PDCP layer.When calculating buffer size, do not consider the size of RLC header and mac header.The length of this field is 6 bits.

With reference to Figure 29, the invention provides medium access control (MAC) entity (2912,2922) that is arranged in UE 2910 and eNB 2920.This MAC entity comprises: inspection unit (2913,2923), and whether it is to there being any available fill area to check in the MAC PDU that constructs; Comparing unit (2915,2925), it adds that with filling bit number and Buffer Status Report (BSR) size of its sub-header compares; And processing unit (2914,2924), if this filling bit number adds the size of its sub-header greater than BSR, then this processing unit cooperates to trigger Buffer Status Report (BSR) process with this inspection unit and this comparing unit, this BSR and sub-header thereof are included among the MAC PDU, and LCID is set in sub-header has comprised this situation of BSR with indication, this BSR is triggered owing to filling.

This processing unit is also carried out following steps: receive the mandate of the described MAC PDU of structure from network; And construct this MAC PDU by utilizing higher logical channel data and MAC control element.MAC PDU can comprise short BSR, and this weak point BSR has Logic Channel Identifier (LCID) field of 2 bytes and the buffer size of 6 bytes.Can for short BSR or for the BSR of brachymemma independent Logic Channel Identifier (LCID) field be set by processing unit.The LCID field can identify respectively the type of the logic channel example of corresponding MAC SDU, corresponding MAC control element or fills for DL-SCH and UL-SCH.The LCID field can comprise for the first value of short Buffer Status Report or for the second value of long Buffer Status Report.The size of BSR is 4 bytes or 8 bytes.

The present invention also provides a kind of construction data unit to comprise the method for Buffer Status Report (BSR), and the method may further comprise the steps: check whether any available fill area is arranged in the MAC PDU that constructs; Filling bit number and BSR are added that the size of its sub-header compares; If this filling bit number then triggers BSR greater than the size that BSR adds its sub-header; This BSR and sub-header thereof are included among the MAC PDU; And LCID is set in this sub-header has comprised this situation of BSR with indication, this BSR is triggered owing to filling.

The method is further comprising the steps of: receive the mandate of the described MAC PDU of structure from network; And construct this MAC PDU by utilizing higher logical channel data and MAC control element.MAC PDU can comprise short BSR, and this weak point BSR has Logic Channel Identifier (LCID) field of 2 bytes and the buffer size of 6 bytes.Can independent Logic Channel Identifier (LCID) field be set for short BSR or for the BSR of brachymemma.The LCID field can identify respectively the type of the logic channel example of corresponding MAC SDU, corresponding MAC control element or fills for DL-SCH and UL-SCH.The LCID field can comprise for the first value of short Buffer Status Report or for the second value of long Buffer Status Report.The size of BSR is 4 bytes or 8 bytes.

Can realize the various features and the concept that illustrate here according to software, hardware or their combination.For example, the computer program (this computer program is carried out in computer, terminal or the network equipment) for the treatment of the method and system of Buffer Status Report (BSR) can comprise one or more program code segments of carrying out various tasks.Similarly, the Software tool (this Software tool is carried out in computer, terminal or the network equipment) for the treatment of the method and system of Buffer Status Report (BSR) can comprise the program code part of carrying out various tasks.

According to the method and system for the treatment of Buffer Status Report (BSR) of the present invention and various types of technology and operating such.Here the specific concept of explanation relates to various types of standards, such as GSM, 3GPP, LTE, IEEE, 4G etc.Yet be appreciated that because other relevant standard and technology also go for the various features and the concept that illustrate here, so the standard of above example is not in order to limit.

Industrial applicability

Here the feature of explanation and concept for the treatment of the various subscriber equipmenies of Buffer Status Report (BSR) (for example are applicable to be configured to support, portable terminal, mobile phone, Wireless Telecom Equipment etc.) and/or network entity, and can in these subscriber equipmenies and network entity, realize these features and concept.

Owing to can realize each conception of species of illustrating and feature here and not break away from the feature of explanation here according to various ways; so it is also understood that; unless explicitly point out separately; otherwise any details before above-mentioned execution mode is not limited in the explanation, but should within the protection range that claims limit, broadly make an explanation.Therefore, claims are intended to contain whole changes and the modification that falls within this scope and the equivalent thereof.

Claims

1. the method for a deal with data unit, the method may further comprise the steps:

Determine whether available filling bit is arranged in described data cell; And

If available filling bit is arranged in described data cell, then when determine the filling bit number more than or equal to short Buffer Status Report BSR add corresponding sub-header size, but add the size of corresponding sub-header less than long BSR, and when determining that a plurality of logic channel groups have the buffered data that can send by up link, in described data cell, insert brachymemma BSR and with the corresponding sub-header of the BSR of this brachymemma.

2. method according to claim 1, the method is further comprising the steps of: generate described BSR and with the corresponding sub-header of described BSR, wherein, described sub-header comprises the value that described BSR is designated the BSR of brachymemma.

3. method according to claim 2, wherein, the step that generates described BSR comprises: insert the first value in described BSR, this first value is indicated has a logic channel group of limit priority in described a plurality of logic channel groups; And in described BSR, insert the second value, this second value is indicated and a described data volume that the logic channel group is associated.

4. method according to claim 1, the method is further comprising the steps of: if determine the filling bit number more than or equal to short BSR add corresponding sub-header size, but add the size of corresponding sub-header less than long BSR, and only determine that a logic channel group has the buffered data that can send by described up link, then in described data cell, insert short BSR and with the corresponding sub-header of this weak point BSR.

5. method according to claim 4, the method is further comprising the steps of: generate described BSR and with the corresponding sub-header of described BSR, wherein, described sub-header comprises the value that described BSR is designated short BSR.

6. method according to claim 5, wherein, the step that generates described BSR comprises: insert the first value in described BSR, this first value is indicated the logic channel group with buffered data that can be by described up link transmission; And in described BSR, insert the second value, this second value is indicated and the data volume that can be associated by the logic channel group that described up link sends.

7. method according to claim 1, the method is further comprising the steps of: add the size of corresponding sub-header if determine the filling bit number more than or equal to long BSR, then in described data cell the long BSR of insertion and with the corresponding sub-header of this long BSR.

8. method according to claim 7, the method is further comprising the steps of: generate described BSR and with the corresponding sub-header of described BSR, wherein, described sub-header comprises the value that described BSR is designated long BSR.

9. method according to claim 8, wherein, the step that generates described BSR comprises: insert a plurality of values in described BSR, wherein, each value in described a plurality of value is all indicated the data volume that is associated with the respective logical channels group with the buffered data that can send by described up link.

10. method according to claim 1, wherein, described data cell is medium access control Medium Access Control (MAC) Protocol Data Unit PDU.

11. method according to claim 10, the method is further comprising the steps of: the form with the MAC control element generates described BSR; In described MAC PDU, insert one or more MAC control elements, comprise described BSR; And in described one or more the MAC control elements each, in described MACPDU, insert corresponding sub-header, wherein, comprise the value that described BSR is designated the BSR of brachymemma with the corresponding sub-header of described BSR.

12. method according to claim 11, wherein, the step that generates described BSR with the form of MAC control element comprises: insert the first value in described BSR, this first value is indicated has a logic channel group of limit priority in described a plurality of logic channel groups; And in described BSR, insert the second value, this second value is indicated and a described data volume that the logic channel group is associated.

13. a portable terminal, this portable terminal comprises:

Determining unit, it determines whether available filling bit is arranged in Medium Access Control (MAC) Protocol Data Unit PDU;

Comparing unit, if available filling bit is arranged, then described comparing unit adds the filling bit number size of corresponding sub-header compares and adds that with long BSR the size of corresponding sub-header compares with short Buffer Status Report BSR; And

Processing unit, if the filling bit number more than or equal to short BSR add corresponding sub-header size, but add the size of corresponding sub-header less than long BSR, if and exist and to have a plurality of logic channel groups of the buffered data that can send to the base station of serving, then described processing unit in described MAC PDU, insert brachymemma BSR and with the corresponding sub-header of the BSR of this brachymemma.

14. portable terminal according to claim 13, wherein, described processing unit also is configured to: generate described BSR and with the corresponding sub-header of described BSR so that described sub-header comprises the value that described BSR is designated the BSR of brachymemma.

15. portable terminal according to claim 14, wherein, described processing unit also is configured to: insert the first value in described BSR, this first value indication has a logic channel group of limit priority in described a plurality of logic channel groups; And in described BSR, insert the second value, this indication of the second value and a described data volume that the logic channel group is associated.

16. portable terminal according to claim 13, wherein, described processing unit also is configured to: if determine the filling bit number more than or equal to short BSR add corresponding sub-header size, but add the size of corresponding sub-header less than long BSR, and only determine that a logic channel group has the buffered data that can send by described up link, then in described MAC PDU, insert short BSR and with the corresponding sub-header of this weak point BSR.

17. portable terminal according to claim 16, wherein, described processing unit also is configured to: generate described BSR and with the corresponding sub-header of described BSR so that described sub-header comprises the value that described BSR is designated short BSR.

18. portable terminal according to claim 17, wherein, described processing unit also is configured to: insert the first value in described BSR, this first value is indicated the logic channel group with buffered data that can be by described up link transmission; And in described BSR, insert the second value, this second value is indicated and the data volume that can be associated by the logic channel group that described up link sends.

19. portable terminal according to claim 13, wherein, described processing unit also is configured to: add the size of corresponding sub-header if determine the filling bit number more than or equal to long BSR, then in described MAC PDU the long BSR of insertion and with the corresponding sub-header of this long BSR.

20. portable terminal according to claim 19, wherein, described processing unit also is configured to: generate described BSR and with the corresponding sub-header of described BSR so that described sub-header comprises the value that described BSR is designated long BSR.

21. portable terminal according to claim 20, wherein, described processing unit also is configured to: insert a plurality of values in described BSR, wherein, each value in described a plurality of value is all indicated the data volume that is associated with the respective logical channels group with the buffered data that can send by described up link.

22. portable terminal according to claim 13, wherein, described processing unit also is configured to: the form with the MAC control element generates described BSR; In described MAC PDU, insert one or more MAC control elements, comprise described BSR; And in described one or more the MAC control elements each, in described MAC PDU, insert corresponding sub-header, wherein, comprise the value that described BSR is designated the BSR of brachymemma with the corresponding sub-header of described BSR.

23. portable terminal according to claim 22, wherein, described processing unit also is configured to: insert the first value in described BSR, this first value indication has a logic channel group of limit priority in described a plurality of logic channel groups; And in described BSR, insert the second value, this second value is indicated and a described data volume that the logic channel group is associated.