CN1964314A

CN1964314A - A method to transmit IP message by high speed downlink packet access technology of HSDPA

Info

Publication number: CN1964314A
Application number: CNA200510115580XA
Authority: CN
Inventors: 庄宏成
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-11-07
Filing date: 2005-11-07
Publication date: 2007-05-16
Anticipated expiration: 2025-11-07
Also published as: CN100442773C

Abstract

The related method for transferring IP message by HSDPA comprises: after entering UTRAN, packing the IP message and adding relative sub-head to construct MAC-d PDU and send to MAC-hs layer; according to current PDU size fit to transfer, partitioning or combining the MAC-d PDU to map into MAC-hs SDU, adding MAC-hs sub-head to transfer on HS- DSCH. This invention can improve bandwidth utility, reduces message transmission delay, and can increase system business expansion capacity.

Description

Method by the high speed downlink packet access technology of HSDPA transmit IP message

Technical field

The present invention relates to the communications field, relate in particular to a kind of method by the high speed downlink packet access technology of HSDPA transmit IP message.

Background technology

From Release5,3GPP provides high speed downlink packet access mechanism (HSDPA), in order to the downlink grouped high-speed transfer of interface aloft to be provided.It is shared transmission channel (HS-PDSCH), downlink high-speed shared control channel (HS-SCCH) and HS-DSCH dedicated uplink physical control channel (HS-DPCCH) interaction by high-speed downlink shared transmission channel (HS-DSCH), high-speed downstream physics and realizes.

For reaching the purpose of downlink transfer at a high speed, HSDPA adopts following several characteristic:

1, shares transmission channel scheduling fast.

The HS-DSCH of the weak point of 2ms transmission TTI (just 2ms scheduled transmission once, the TTI of other transmission channels minimum is 10ms).This just can carry out the scheduling of shared channel fast, adapts to the situation of change of wireless channel apace;

2, adaptive modulation and coding (AMC).

Measure the situation of change of downlink wireless channel in real time, rapid adjustment modulation and encoding scheme are to adapt to the variation of wireless channel.After modulation and encoding scheme are determined, also carry out transmission rate fine setting fast, further adapt to the situation of wireless channel, reach the purpose that makes full use of the wireless channel frequency spectrum.

3, mix affirmation retransmission mechanism (HARQ).

Utilize the re-transmission policy of multiple redundant information, increase the utilance of error correction information, reach to reduce and retransmit the bandwidth that takies, improve the purpose of transmission reliability simultaneously.

Insert in (WCDMA) system and the TD-SCDMA system in the Wideband Code Division Multiple Access (WCDMA) of 3GPP, its network configuration as shown in Figure 1: comprise UMTS system ground Radio Access Network (UTRAN) and UE, wireless air interface (Uu) is the interface between UTRAN and the UE.Wherein, described UTRAN comprises radio network controller (RNC) and NodeB, and connecting interface therebetween is an Iub interface.

Downstream IP grouping message enters RNC from network side, is transferred to NodeB by Iub interface, is transferred to UE by NodeB by wireless air interface Uu.

The protocol architecture of the Uu interface by HSDPA transmission downlink grouped message comprises: packet data polymerized protocol layer (PDCP), wireless chain control layer (RLC), media access control layer (MAC) and radio physical layer (PHY) as shown in Figure 2.

Described packet data polymerized protocol layer (PDCP) is used to provide services such as the transmission of IP message on RB, compression.

Described wireless chain control layer (RLC) is used to carry out the operation such as burst, reorganization, affirmation re-transmission, ordering, Flow Control of message and transmits on logic channel DTCH, provides the transmission of message on radio bearer (RB, Radio Bearer) to PDCP.

Described media access control layer (MAC) is used to provide the scheduling of message and transmits on transmission channel, and the transmission service of logic channel upwards is provided.Logic channel need be mapped to transmission channel.When logic channel DTCH was mapped on the HS-DSCH, the MAC layer comprised MAC-d sublayer and MAC-hs sublayer, and the MAC-d sublayer is positioned at RNC, carried out message in other scheduling and multiplexing of UE level; The MAC-hs sublayer is positioned at NodeB, carries out the scheduling of message in cell level, and sends on HS-DSCH.

Described radio physical layer (PHY) is used for transmitting data by aerial physical channel to UE, and the transmission service of transmission channel (Transport Channel) upwards is provided.When using HSDPA transmission downlink grouped, physical channel comprises HS-PDSCH, HS-SCCH and HS-DPCCH.

The packet transmission that protocol architecture by above-mentioned Uu interface carries out HSDPA is as follows:

Grouped data report sends to NodeB by the Frame Protocol (FP) of the HS-DSCH of Iub interface, and MAC-hs will carry out the scheduling of message.When the MAC-hs sublayer sent the HS-DSCH message need for certain UE, transmitting scheduling information on HS-SCCH sent the HS-DSCH message on HS-PDSCH after 2 time slots earlier.UE need monitor the schedule information on the HS-SCCH, when receiving the schedule information of oneself, just receives the HS-DSCH message on the HS-PDSCH of appointment.Because comprised transformat and the information such as channel coding schemes, HS-PDSCH modulating mode of HS-DSCH in the HS-SCCH schedule information, UE just can receive the decode the data on the HS-PDSCH channel.UE need be to NodeB feedback reception result (whether correctly receiving) and radio channel state on up HS-PDCCH channel.MAC-hs is according to this feedback information, and whether decision needs to retransmit message (if incorrect the reception just needs to retransmit), simultaneously also will be according to the schedule information of the next transmission of radio channel state decision.

Because MAC-hs at NodeB, does not need the mutual schedule information with RNC, HS-DSCTTI is 2ms simultaneously, and the feedback information of HS-DPCCH is also physical layer (reaction is fast), so can realize fast dispatch.

The technical scheme of prior art one related to the present invention is to realize that its main thought is as follows on the basis according to the PDU of the HS-DSCH of 3GPP technology definition at present:

For transmission grouping on HS-DSCH, defined the size of the PDU of HS-DSCH in the present 3GPP technical specification document, the PDU size of MAC-d sublayer.Wherein the PDU size of HS-DSCH is according to the wireless channel state dynamic change, radio channel state good more (little such as decay, disturb less or multipath few), its PDU is just big more, channel width is just big more.The PDU size of MAC-d sublayer is to define when RB sets up, is changeless.Because burst and polymerization are not carried out to SDU in the MAC-d sublayer, so, when the IP message arrived the RLC entity, the RLC entity need be cut apart big SDU, and little SDU is carried out the PDU that polymerization (or the data that fill in the blanks) meets MAC-d.In the MAC-hs entity, only carry out the polymerization transmission of MAC-d PDU, and MAC-d PDU can not cut apart.

The PDU structure flow process of IP message on HSDPA be as shown in Figure 3:

After step 1, IP message enter UTRAN, be packaged into IP PDU, and will be mapped to the PDCP SDU of PDCP layer at the IP layer;

Step 2, do not cut apart and polymerization, but be that described PDCP SDU adds PDCP head (in some cases, may not having the PDCP head), be configured to PDCP PDU, send rlc layer then at the PDCP layer.

Step 3, rlc layer need be cut apart big SDU, or little SDU is carried out polymerization according to the size of the PDU of MAC-d sublayer.When cutting apart, on each RLC SDU burst, add a RLC head, be configured to RLC PDU, then each RLC PDU is mapped to the SDU of corresponding MAC-d.

Step 4, when a plurality of logic channels are multiplexed on the same MAC-d stream, in the MAC-d sublayer, no longer MAC-d SDU is carried out burst or polymerization, but directly on each MAC-d SDU, add the MAC-d head, in order to indicate logical channel number, its length is fixed as 4 bits (a plurality of logic channels are not multiplexing when having, and just do not need this MAC-d head), is configured to MAC-d PDU; FP frame by Iub interface then shines upon MAC-hsSDU to the MAC-hs sublayer of Node B with MAC-d PDU.

Above-mentioned series operation is the operation of carrying out at the IP message flow on the same MAC-d stream of a UE inside.UE has message on a plurality of MAC-d streams and is mapped to HS-DSCH and goes up and send, and the corresponding MAC-d PDU size of different MAC-d stream may be different, but they all send on same HS-DSCH.

The different RB of step 5, same UE may be mapped to different MAC-d stream, after this flows to and reaches the MAC-hs sublayer, polymerization is carried out to these MAC-hs SDU in the MAC-hs sublayer, adds the MAC-hs head then on the MAC-hs SDU after the polymerization, is configured to MAC-hs PDU.

The MAC-hs PDU structure that is configured to as shown in Figure 4, comprises a MAC-hs head and MAC-hs SDU, and wherein said MAC-hs head comprises the combination of a VF, Queue ID, TSN and a plurality of SID, N, F.Be described as follows:

VF, 1 bit, used for the MAC-hs expansion, must fill out is 0;

Queue ID, 3 bits are queue identity, sign MAC-hs carries out the formation of HARQ operation.HARQ carries out respectively according to formation;

TSN, 6 bits are transmission sequence number (Transmission Sequence Number), identify the serial number of message in the formation.Because adopt the multi-thread wait method that stops to realize confirming to retransmit among the HARQ, this sequence number is in order to arrange in order the message in the formation at the UE end, and that realizes message at last submits to the upper strata in order;

SID, 3 bits are SDU length index signs (Size Index Identifier).The real length of SDU and corresponding index thereof configure when RB sets up and remain unchanged in transmission course; As long as fill out SID here, just can carry out matched and searched at the UE end, obtain real SDU length;

N, 7 bits, expression has the number of the SDU of the represented length of SID continuously.

F, 1 bit, if be 0, sign is another SID followed by the follow-up data of this bit, N, F combination; Be 1, show that follow-up data is the PDU of a MAC-d.

In step 5, the MAC-hs sublayer is not cut apart the PDU of MAC-d.At this moment, if radio channel state is good more, MAC-hs PDU is just long more, just can the many more MAC-hs SDU of polymerization, and when not having so much PDU to carry out polymerization, the data that just need fill in the blanks are to take PDU.Otherwise wireless channel is poor more, and the MAC-hs SDU that once can carry is just few more, and when MAC-hs SDU deducted the MAC-hs head length greater than MAC-hs PDU, this MAC-hs SDU just can't send at current time.

By foregoing description as can be seen:

When wireless channel is fine, MAC-hs PDU is very big, but because the size of MAC-d PDU is fixed, at this moment, rlc layer just need be cut apart big IP message, and adds RLC and MAC-d head (RLC head generally be 2 or 3 bytes or more than) on each burst after cutting apart, and same IP message is divided into a plurality of small pieces and is carried on the same MAC-hs PDU and sends, the centre has increased operation, has also increased RLC/MAC-d head taking channel width simultaneously.

When wireless channel is very poor, HS-DSCH can only send small messages, because the size of MAC-d PDU is fixed, RLC need carry out polymerization to little IP message, cause MAC-d PDU greater than MAC-hs SDU so again easily, cause and MAC-d PDU in time can't be sent, could send when having only the channel condition of wait to take a turn for the better.This is for real time business (especially resembling the real time business of the such small messages of VoIP), because the increasing of propagation delay time will cause the quality of service variation.

When RLC does not have suitable IP message can polymerization or cut apart when forming MAC-d SDU, RLC need fill useless clear data in the PDU of oneself.And in IP network, the size of IP message is unfixed, and this rough sledding ratio is easier to occur; And in the MAC-hs sublayer, when the MAC-hs SDU that does not have suitable MAC-d PDU correspondence aggregates into MAC-hs PDU, MAC-d PDU can not be cut apart again, data also will fill in the blanks.Therefore, clear data occurs in RLC PDU and MAC-hs PDU, will reduce the utilance of HS-DSCH channel width, causes the waste of resource.

Because the PDU size of MAC-d is to configure when RB sets up, in order to define a reasonably size (balance transmission time delay and RLC PDU number), in the time of configuration RB, need to consider the size of different business message, the frequency information such as (so that RLC polymerizations better) of data flow, thereby the complexity that the increase system realizes also is unfavorable for professional flexible expansion.

Moreover.Can find that from Fig. 3 the size of upper strata RLC SDU is unfixed, its variation with the IP message size changes; And in lower floor, the size of MAC-hs PDU also is unfixed, and its variation with radio channel state changes; But middle MAC-d PDU size is fixed, this just has been configured to the structural contradiction of whole PDU, carry out unnecessary burst on the upper strata when having easily and carry out unnecessary polymerization in lower floor, sometimes carry out polymerization and send the phenomenon of not going out too greatly owing to message, so prior art is not suitable for the message characteristic of IP network in lower floor on the upper strata.

In sum, there is following defective in above-mentioned prior art:

1, prior art is not suitable for the message characteristic of IP network;

2, too much RLC/MAC-d head has been wasted HS-DSCH channel width, reduces the wireless channel utilance;

3, the blank that occurs easily among the RLC/HS-DSCH PDU is filled, and further reduces the wireless channel utilance;

4, when radio channel state is bad, the time delay that causes data to send easily strengthens.For real time business, can have a strong impact on quality of service;

5, increase the complexity of system;

6, reduce the flexibility of professional expansion.

Summary of the invention

The purpose of this invention is to provide a kind of method by the high speed downlink packet access technology of HSDPA transmit IP message, by the present invention, can be at the characteristics of IP grouped data, solve the mechanism that is not suitable for transmitting the IP grouped data in the HSDPA system among the RLC/MAC-d/MAC-hs, reduce RLC/MAC-d head taking simultaneously to wireless signal-path band width, reduce the probability of the PDU empty padding data appearance of RLC/MAC-hs, thereby improve the wireless bandwidth utilance; And when radio channel state was bad, the time delay that data send can not strengthen yet, thereby guaranteed professional quality; Moreover the present invention can reduce the complexity of RB configuration, the complexity of reduction system, thereby the professional flexibility of raising system expansion.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides a kind of method by the high speed downlink packet access technology of HSDPA transmit IP message, it comprises:

After A, IP message enter UTRAN,, be configured to MAC-d PDU, and it is transferred to high speed shared medium access control MAC-hs layer through encapsulation process and after adding corresponding son head;

The size of B, the own current PDU that can transmit of described MAC-hs layer basis, the MAC-d PDU that receives is carried out burst or aggregation processing, and be mapped as corresponding MAC-hs SDU, will on high speed downlink shared channel HS-DSCH, transmit behind the MAC-hs SDU interpolation MAC-hs head that obtain.

Wherein, described steps A specifically comprises:

After A1, IP message enter UTRAN, it is mapped to the PDCP SDU of PDCP layer;

A2, at the PDCP layer, described PDCP SDU is handled accordingly, and, is configured to PDCP PDU for the PDCP SDU after handling adds the PDCP head, then it is mapped to the RLC SDU of rlc layer;

A3, at rlc layer, described RLC SDU is handled accordingly, and, is configured to RLC PDU for the RLCSDU after handling adds the RLC head, then it is mapped to the MAC-dSDU of MAC-d layer;

A4, at the MAC-d layer, described MAC-d SDU is handled accordingly, and, is configured to the MAC-d PDU of variable-length or regular length for the MAC-d SDU after handling adds the MAC-d head, then it is transferred to the MAC-hs layer.

Wherein, described steps A 3 specifically comprises:

A31, at rlc layer, according to what know is the maximum length value that a MAC-d PDU sets, described RLC SDU is carried out burst or aggregation processing, and the maximum length value that makes SDU after all bursts or the polymerization be not more than a MAC-d PDU of described setting deducts the value of gained after MAC-d head and the RLC head length value;

A32, for the RLC SDU behind the described burst adds corresponding RLC head, be configured to RLCPDU, then it is mapped to the MAC-d SDU of MAC-d layer;

Or,

A33, at rlc layer, to the RLC SDU of any size, keep described RLC SDU length constant, and add corresponding RLC head, be configured to RLC PDU, then it is mapped to the MAC-d SDU of MAC-d layer.

Wherein, described step B specifically comprises:

The size of B1, the own current PDU that can transmit of described MAC-hs layer basis MAC-dPDU is carried out burst handle, and described each burst that will obtain is mapped as corresponding MAC-hsSDU respectively;

Or,

Described MAC-hs layer carries out aggregation processing according to the size of the own current PDU that can transmit to MAC-d PDU, and the described polymerization PDU that will obtain is mapped as corresponding MAC-hs SDU;

B2, based on the corresponding MAC-hs PDU of described MAC-hs SDU structure, and it is sent out.

Wherein, described MAC-hs SDU comprises:

The MAC-hs SDU of the MAC-hs SDU of the MAC-hsSDU of the MAC-hs SDU of the MAC-hs SDU of the MAC-hs SDU of the MAC-hs SDU of Type W type, Type H type, Type M type, Type T type, Type HTS type, Type HMS type, Type MMS type, and/or the MAC-hs SDU of Type MTS type.

Wherein, the MAC-hs SDU of described Type W type comprises: a complete MAC-dPDU.

Wherein, the MAC-hs SDU of described Type H type comprises: a MAC-d PDU first burst after by the order burst.

Wherein, the MAC-hs SDU of described Type M type comprises: the middle burst of a MAC-d PDU after by the order burst.

Wherein, the MAC-hs SDU of described Type T type comprises: a MAC-d PDU last burst after by the order burst.

Wherein, the MAC-hs SDU of described Type HTS type comprises:

By same MAC-d PDU SDU, the SDU of at least one M type of a H type forming of burst and the SDU of a T type in order, and be arranged on it among MAC-hs PDU successively continuously;

Or,

By same MAC-d the PDU SDU of a H type forming of burst and the SDU of a T type in order, and it is arranged among the MAC-hs PDU successively continuously.

Wherein, the MAC-hs SDU of described Type HMS type comprises:

By same MAC-d PDU SDU, the SDU of at least one M type of a H type forming of burst in order, and it is arranged among the MAC-hs PDU successively continuously.

Wherein, the MAC-hs SDU of described Type MMS type comprises:

By the same MAC-d PDU SDU of at least two M types forming of burst in order, and it is arranged among the MAC-hs PDU successively continuously.

Wherein, the MAC-hs SDU of described Type MTS type comprises:

By same MAC-d the PDU SDU of at least one M type of forming of burst and the SDU of a T type in order, and it is arranged among the MAC-hs PDU successively continuously.

Wherein, among the step B2, the process of constructing corresponding MAC-hs PDU based on described MAC-hs SDU specifically comprises:

Based on described MAC-hs SDU, and, select corresponding M AC-hs SDU element among the MAC-hsPDU, and after adding the MAC-hs head and handling, be configured to MAC-hs PDU according to the tactical rule of MAC-hs PDU.

Wherein, described structure principle comprises:

A PDU comprises at least one SDU, and the length of described SDU is the integral multiple of byte.

Wherein, described structure principle also comprises:

A PDU comprises padding data, and described padding data is set occupies the last byte of PDU;

Wherein, described structure principle also comprises:

A PDU comprises the SDU of at least one W type and/or the SDU set of at least one HTS type;

Or,

A PDU comprises the SDU of the SDU set of the SDU set of the SDU of the SDU of the SDU of a W type, a HTS type, a H type, a HMS type, the SDU of a M type, a MMS type, a type T or the SDU set of a MTS type.

Wherein, described structure principle also comprises:

A PDU comprises the SDU of at least one W type and the SDU of a H type, and the SDU of H type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU of a H type, and the SDU of H type must be after the SDU of HTS type set;

Or,

A PDU comprises the SDU of at least one W type and the SDU set of a HMS type, and the SDU of HMS type set must be after the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU set of a HMS type, and the SDU of HMS type must be after the SDU of HTS type.

Wherein, described structure principle also comprises:

A PDU comprises the SDU of at least one W type and the SDU of a T type, and the SDU of T type must be before the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU set of a T type, and the SDU of T type must be before the SDU of HTS type;

Or,

A PDU comprises the SDU of at least one W type and the SDU set of a MTS type, and the SDU of MTS type must be before the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU set of a MTS type), and the SDU of MTS type must be before the SDU of HTS type.

Wherein, described structure principle also comprises:

A PDU comprises the SDU of at least one W type and the SDU of a M type, and the SDU of M type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU of a M type, and the SDU of M type must be after the SDU of HTS type;

Or,

A PDU comprises the SDU of at least one W type and the SDU set of a MMS type, and the SDU of MMS type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type and the SDU set of a MMS type, and the SDU of MMS type must be after the SDU of HTS type.

Wherein, described structure principle also comprises:

A PDU comprises the SDU of the SDU of at least one W type, a T type and the PDU of a H type, and the SDU of T type must be before the SDU of W type, and the SDU of H type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of at least one HTS type, the SDU of a T type and the SDU of a H type, and the SDU of T type must be before the SDU of HTS type, and the SDU of H type must be after the SDU of HTS type;

Or,

A PDU comprises the SDU set of the SDU of at least one W type, a MTS type and the SDU of a H type, and the SDU of MTS type must be before the SDU of W type, and the SDU of H type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of the SDU set of at least one HTS type, a MTS type and the SDU of a H type, and the SDU of MTS type must be before the SDU of HTS type, and the SDU of H type must be after the SDU of HTS type;

Or,

A PDU comprises the SDU of the SDU of at least one W type, a T type and the SDU set of a HMS type, and the SDU of T type must be before the SDU of W type, and the SDU of HMS type must be after the SDU of W type;

Or,

A PDU comprises the SDU of the SDU set of at least one HTS type, a T type and the SDU set of a HMS type, and the SDU of T type must be before the SDU of HTS type, and the SDU of HMS type must be after the SDU of HTS type;

Or,

A PDU comprises the SDU set of the SDU of at least one W type, a MTS type and the SDU of a HMS type, and the SDU of MTS type must be before the SDU of W type, and the SDU of HMS type must be after the SDU of W type;

Or,

A PDU comprises the SDU set of the SDU set of at least one HTS type, a MTS type and the SDU of a HMS type, and the SDU of MTS type must be before the SDU of HTS type, and the SDU of HMS type must be after the SDU of HTS type.

Wherein, described structure principle also comprises:

A PDU comprises the SDU of a T type and the SDU of a H type, and the SDU of T type must be before the SDU of H type;

Or,

A PDU comprises the SDU set of a MTS type and the SDU of a H type, and the SDU of MTS type must be before the SDU of H type;

Or,

A PDU comprises the SDU of a T type and the SDU set of a HMS type, and the SDU of T type must be before the SDU of HMS type;

Or,

A PDU comprises the SDU set of a MTS type and the SDU set of HMS type, and the SDU of MTS type must be before the SDU of HMS type.

Wherein, described MAC-hs head specifically comprises:

VF, Queue ID, a TSN and at least one SDU leader;

Described VF is used for the expansion of MAC-hs;

Described Queue ID is used to identify the formation that MAC-hs carries out the HARQ operation;

Described TSN is used for identifying the serial number of a formation message;

Described SDU leader is used for identifying the information of SDU of the correspondence of MAC-d PDU.

Wherein, described SDU leader comprises:

A len field, a H field, a T field and a F field;

Described len field is used to represent corresponding SDU length;

Described H field, whether be used to identify this SDU is first burst of a MAC-d PDU;

Described T field, whether be used to identify this SDU is last burst of a MAC-d PDU;

Described F field is used to represent that the data immediately following after this bit are another SDU leaders; Or, be used to represent that the data immediately following after this bit are SDU data.

As seen from the above technical solution provided by the invention, after the IP message enters UTRAN among the present invention,, be configured to MAC-d PDU, and it is transferred to the MAC-hs layer through encapsulation process and after adding corresponding son head; Described MAC-hs layer carries out burst or aggregation processing according to the size of the current PDU that can transmit to the MAC-d PDU that receives, and is mapped as corresponding MAC-hs SDU, the MAC-hs SDU that obtains is added son head back transmit by HS-DSCH.By the present invention, the SDU that the IP message can be divided into random length transmits, thereby can transmit IP grouping message fully neatly on HSDPA; And, when transmitting long IP message, can reduce RLC/MAC-d head number, reduce the probability that the clear data of RLC PDU and MAC-hs PDU is filled, thereby improve bandwidth availability ratio; When radio channel state is bad, can reduce the transmission delay of message, can make full use of the bandwidth of wireless channel, this point is concerning real time business, and is even more important; The present invention is simple and easy to realize, can not increase the operation complexity of system, and the present invention can reduce the complexity that RB disposes, the professional together correlation degree of reduction RB configuration, thereby the service expansion capability of raising system.

Description of drawings

Fig. 1 is the schematic network structure in WCDMA and the TD-SCDMA system;

Fig. 2 is the protocol architecture schematic diagram of the UU interface of downstream IP message on HSDPA;

Fig. 3 is the PDU structure flow chart of prior art IP message in each layer;

Fig. 4 is the PDU structural representation of the MAC-hs that defines in the prior art;

Fig. 5 is the PDU structure flow chart of the IP message among the present invention in protocol stack is handled;

Fig. 6 is the MAC-hs SDU that defines among the present invention and the type of set thereof;

Fig. 7 is MAC-hs PDU tactical rule schematic diagram among the present invention;

Fig. 8 is the MAC-hs PDU head construction schematic diagram of the present invention's definition.

Embodiment

The characteristics of IP grouped data are flexibly, and size is fixing, and with independent of service.The present invention is according to the characteristics of IP grouped data, a kind of mechanism that is fit to transmission IP grouped data in the HSDPA channel is proposed, its main thought is: remove the definition to MAC-d PDU fixed size, and need not cut apart or polymerization corresponding SDU at rlc layer, and directly RLC SDU is added that head configuration becomes the MAC-d SDU that is mapped to the MAC-d layer behind the RLCPDU, be configured to be mapped to the MAC-hs layer behind the PDU after MAC-d SDU being added oneself head by the MAC-d layer then; The MAC-hs layer carries out burst or the polymerization of SDU according to the size of the PDU of own current transmission.

First embodiment provided by the invention as shown in Figure 5, is not cut apart or polymerization the SDU of oneself at PDCP, RLC, MAC-d layer, and this work is placed on the MAC-hs layer and does.Because have only the MAC-hs layer to know the current PDU length that oneself can transmit, can reasonably cut apart and polymerization in conjunction with the situation of the current MAC-d PDU that will transmit.A long MAC-d PDU may be divided into several MAC-hs SDU, and sends in several MAC-hs PDU.The MAC-dPDU of several weak points can be aggregated into a MAC-hs PDU and send.Simultaneously, the present invention's regulation is when MAC-d is mapped on the HS-DSCH, and its head length is 1 byte (8 bit), and wherein 4 bits of low level are used to identify the numbering of logic channel equally, and 4 high-order bits are used for protocol extension.Purpose is in order to allow the length of MAC-d PDU be the integral multiple of byte.Specific implementation process comprises the steps:

Step 11, at the IP layer, by the IP agreement IP message of transmission is packaged into IP PDU, and it is mapped to the PDCP SDU of PDCP layer;

Step 12, at the PDCP layer, described PDCP SDU is handled accordingly, and, is configured to PDCP PDU for the PDCP SDU after handling adds the PDCP head, then it is mapped to the RLC SDU of rlc layer;

Step 13, at rlc layer, described RLC SDU is handled accordingly, and, is configured to RLC PDU for the RLC SDU after handling adds the RLC head, then it is mapped to the MAC-d SDU of MAC-d layer;

In step 13, when rlc layer is known the regular length of not setting each MAC-d PDU, do not carry out burst or aggregation processing at rlc layer; That is to say,, keep described RLC SDU length constant, and add corresponding RLC head, be configured to RLC PDU, then it is mapped to the MAC-d SDU of MAC-d layer the RLC SDU of any size.

When rlc layer is known the maximum length of setting a MAC-d PDU, then all RLCSDU are carried out burst or aggregation processing, and the maximum length value that makes SDU after all bursts or the polymerization be not more than a MAC-d PDU of described setting deducts the value of gained after MAC-d head and the RLC head length value; For the RLC SDU after described burst or the polymerization adds corresponding RLC head, be configured to RLCPDU then, then it be mapped to the MAC-d SDU of MAC-d layer.The benefit of this method is, the definition of MAC-d PDU can be considered the transmission network characteristic of Iub interface, avoids that MAC-d PDU is excessive to cause carrying out burst in the transmission network of Iub interface, thereby reduces the efficient of transmission network.

Be the concrete opportunity of setting the maximum length of a MAC-d PDU when DTCH is mapped to HS-DSCH transmission grouping message.

Step 14, at the MAC-d layer, described MAC-d SDU is handled accordingly, and, is configured to the MAC-dPDU of variable-length or regular length for the MAC-d SDU after handling adds the MAC-d head, then it is transferred to the MAC-hs layer.

Among the present invention, can define the MAC-d PDU of regular length as prior art, also can no longer define the regular length of MAC-d PDU, when the present invention does not define the MAC-d PDU of regular length, can be according to the size of the transmission network characteristic flexible configuration RLC PDU of Iub interface, thereby further obtain corresponding M AC-d PDU, to adapt to the transmittability of Iub interface.

The size of the PDU of step 15, the own current transmission of described MAC-hs layer basis, the MAC-d PDU that receives is carried out burst or aggregation processing, and be mapped as corresponding MAC-hs SDU, behind the MAC-hs SDU interpolation head that obtains, be configured to MAC-hs PDU, and on HS-DSCH, transmit.

Specifically comprise:

Described MAC-hs layer MAC-d PDU is carried out burst handle, and the MAC-d PDU behind the described burst that will obtain is mapped as corresponding MAC-hsSDU respectively according to the size of the PDU of own current transmission; Then based on described MAC-hs SDU, and, select corresponding M AC-hs SDU element among the MAC-hs PDU, and after adding the MAC-hs head and handling, be configured to MAC-hs PDU, and it is sent out on HS-DSCH according to the tactical rule of MAC-hs PDU.

Or,

Described MAC-hs layer carries out aggregation processing according to the size of the PDU of own current transmission to MAC-d PDU, and the MAC-d PDU after the described polymerization that will obtain is mapped as corresponding MAC-hs SDU; Then based on described MAC-hs SDU, and, select corresponding M AC-hs SDU element among the MAC-hsPDU, and after adding the MAC-hs head and handling, be configured to MAC-hs PDU, and it is sent out on HS-DSCH according to the tactical rule of MAC-hs PDU.

Above-mentioned MAC-hs SDU comprises 4 types MAC-hs SDU and 4 types SDU set as shown in Figure 6.The type of described MAC-hs SDU and set thereof is as follows:

1, Type W:W (Whole) type MAC-hs SDU.The type SDU comprises a complete MAC-d PDU;

2, Type H:H (Head) type MAC-hs SDU.The type SDU comprises a MAC-dPDU first burst after by the order burst;

3, Type M:M (Mid) type MAC-hs SDU.The type SDU comprises the middle burst of a MAC-dPDU after by the order burst;

4, Type T:T (Tail) type MAC-hs SDU.The type SDU comprises a MAC-dPDU last burst after by the order burst.

5, Type HTS: the type is the set of a kind of SDU, and it is that SDU by the SDU of the SDU of a H type, at least one M type and a T type combines; Or, combine by the SDU of a H type and the SDU of a T type; And these SDU must be arranged among the MAC-hs PDU in MAC-hs PDU successively continuously, and they are that a MAC-d PDU is split to form in order.

6, Type HMS: the type is the set of a kind of SDU, and it is that SDU by the SDU of a H type, at least one M type combines; And be arranged on continuously successively among the MAC-hs PDU, they are split to form in proper order by a MAC-d PDU.

7, Type MMS: the type is the set of a kind of SDU, and it is that SDU by at least two M types combines; And these SDU are arranged on MAC-hs PDU successively continuously, and they are split to form in proper order by a MAC-d PDU.

8, Type MTS: the type is the set of a kind of SDU, and it is that SDU by the SDU of at least one M type and a T type combines; And these SDU are arranged among the MAC-hsPDU successively continuously, and they are split to form in proper order by a MAC-d PDU.

In step 15, in the time of structure MAC-hs PDU, follow following rule,

1, a PDU must comprise at least one SDU, and the length of described SDU is the integral multiple of byte.

2, a PDU can comprise padding data, and described padding data is set occupies the last byte of PDU.

3, a PDU can only comprise the SDU (or the SDU of MMS type set) of the SDU (or the SDU of HMS type set) of the SDU (or the SDU of HTS type set) of at least one W type, a H type, a M type or the SDU (or the SDU of MTS type set) of a type T.Its concrete implication is as follows:

A PDU comprises the SDU of at least one W type and/or the SDU set of at least one HTS type; Or,

4, rule 4 as shown in Figure 7, a PDU can comprise the SDU (or the SDU of type HTS set) of one or more type W simultaneously, with the PDU (or the SDU of HMS type set) of a type H, and the SDU of type H (HMS) must be after the SDU of type W (HTS).Its concrete implication is as follows:

A PDU comprises the SDU of at least one W type and the SDU of a H type, and the SDU of H type must be after the SDU of W type; Or,

A PDU comprises the SDU set of at least one HTS type and the SDU of a H type, and the SDU of H type must be after the SDU of HTS type set; Or,

A PDU comprises the SDU of at least one W type and the SDU set of a HMS type, and the SDU of HMS type set must be after the SDU of W type; Or,

5, rule 5 as shown in Figure 7, a PDU can comprise the SDU (or the SDU of type HTS set) of one or more type W simultaneously, the SDU of a type T (or the SDU of MTS type set), and the SDU of type T (MTS) must be before the SDU of type W (HTS).Its concrete implication is as follows:

A PDU comprises the SDU of at least one W type and the SDU of a T type, and the SDU of T type must be before the SDU of W type; Or,

A PDU comprises the SDU set of at least one HTS type and the SDU set of a T type, and the SDU of T type must be before the SDU of HTS type; Or,

A PDU comprises the SDU of at least one W type and the SDU set of a MTS type, and the SDU of MTS type must be before the SDU of W type; Or,

6, rule 6 as shown in Figure 7, a PDU can comprise the SDU (or the SDU of type HTS set) of one or more type W simultaneously, the SDU of a type M (or the SDU of MMS type set), and the SDU of type M (MMS) must be after the SDU of type W (HTS).Its concrete implication is as follows:

A PDU comprises the SDU of at least one W type and the SDU of a M type, and the SDU of M type must be after the SDU of W type; Or,

A PDU comprises the SDU set of at least one HTS type and the SDU of a M type, and the SDU of M type must be after the SDU of HTS type; Or,

A PDU comprises the SDU of at least one W type and the SDU set of a MMS type, and the SDU of MMS type must be after the SDU of W type; Or,

7, rule 7 as shown in Figure 7, a PDU can comprise the SDU (or the SDU of type HTS set) of one or more type W simultaneously, with the SDU (or the SDU of MTS type set) of a type T and the PDU (or the SDU of HMS type set) of a type H.And the SDU of type T (MTS) must be before the SDU of type W (HTS); The SDU of type H (FMS) must be after the SDU of type W (HTS).Its concrete implication is as follows:

A PDU comprises the SDU of the SDU of at least one W type, a T type and the PDU of a H type, and the SDU of T type must be before the SDU of W type, and the SDU of H type must be after the SDU of W type; Or,

A PDU comprises the SDU set of at least one HTS type, the SDU of a T type and the PDU of a H type, and the SDU of T type must be before the SDU of HTS type, and the SDU of H type must be after the SDU of HTS type; Or,

A PDU comprises the SDU set of the SDU of at least one W type, a MTS type and the PDU of a H type, and the SDU of MTS type must be before the SDU of W type, and the SDU of H type must be after the SDU of W type; Or,

A PDU comprises the SDU set of the SDU set of at least one HTS type, a MTS type and the PDU of a H type, and the SDU of MTS type must be before the SDU of HTS type, and the SDU of H type must be after the SDU of HTS type; Or,

A PDU comprises the SDU of the SDU of at least one W type, a T type and the PDU of a HMS type, and the SDU of T type must be before the SDU of W type, and the SDU of HMS type must be after the SDU of W type; Or,

A PDU comprises the SDU set of at least one HTS type, the SDU of a T type and the PDU of a HMS type, and the SDU of T type must be before the SDU of HTS type, and the SDU of HMS type must be after the SDU of HTS type; Or,

A PDU comprises the SDU set of the SDU of at least one W type, a MTS type and the PDU of a HMS type, and the SDU of MTS type must be before the SDU of W type, and the SDU of HMS type must be after the SDU of W type; Or,

A PDU comprises the SDU set of the SDU set of at least one HTS type, a MTS type and the PDU of a HMS type, and the SDU of MTS type must be before the SDU of HTS type, and the SDU of HMS type must be after the SDU of HTS type.

8, rule 8 as shown in Figure 7, a PDU can comprise the SDU (or the SDU of MTS type set) of a type T and the SDU (or the SDU of HMS type set) of a type H simultaneously, and the SDU of type T (MTS) must be before the SDU of type H (HMS).Its concrete implication is as follows:

A PDU comprises the SDU of a T type and the SDU of a H type, and the SDU of T type must be before the SDU of H type; Or,

A PDU comprises the SDU set of a MTS type and the SDU of a H type, and the SDU of MTS type must be before the SDU of H type; Or,

A PDU comprises the SDU of a T type and the SDU set of a HMS type, and the SDU of T type must be before the SDU of HMS type; Or,

By HTS wherein as can be known above, HMS, MMS and MTS are made up of a plurality of SDU, these SDU all from same MAC-d PDU order split.The present invention is defined in the length of a SDU among the MAC-hsPDU, identify by a field, and the length of the MAC-d PDU that has that the MAC-hs layer receives can surpass the length that this field identified, but current MAC-hs PDU is also greater than length that this field identified, can carry a plurality of SDU, therefore at this time, just MAC-d PDU need be divided into a plurality of SDU and again they be combined.

When structure MAC-hs PDU, the structure of the MAC-hs head of interpolation comprises as shown in Figure 8:

VF, Queue ID, TSN and one or more SDU leader (SDUHead).Wherein, a SDU leader is made up of a len field, a H field, a T field and a F field.

Wherein, described VF, 1 bit is used for the expansion of MAC-hs, and must fill out is 0;

Described Queue ID, 3 bits are queue identity, are used to identify the formation that MAC-hs carries out the HARQ operation.HARQ carries out respectively according to formation;

Described TSN, 6 bits are transmission sequence number (Transmission SequenceNumber), are used for identifying the serial number of a formation message.Because adopt the multi-thread wait method that stops to realize confirming to retransmit among the HARQ, this sequence number is in order to arrange in order the message in the formation at the UE end, and that realizes message at last submits to the upper strata in order;

Described len field, 10 bits, be used to represent corresponding SDU length, with the byte is unit, because MAC-d PDU is unit with the byte in the present invention, MAC-hs SDU is also cut apart MAC-d PDU according to the byte-aligned mode and is obtained, so can be unit definition SDU length with the byte.With respect to bitwise, can save a lot of bandwidth; (length of LEN may be set different values according to actual conditions, but the essence of the method that does not influence the present invention and created);

Described H field, 1 bit, if 1, identifying this SDU is first burst of a MAC-d PDU, continuous subsequently H is designated 0 SDU and belongs to same MAC-dPDU together with this SDU.The SDU of H and W type, the H bit all is set to 1.

Described T field, 1 bit, if 1, represent that this SDU is last burst of a MAC-d PDU; If 0, just expression is not last burst; The SDU of T and W type, its T bit are 1.

Described F field, 1 bit, if 1, expression is another SDU leaders immediately following the data after this bit; If 0, expression is SDU data immediately following the data after this bit.

By the specific embodiments of the invention described above as can be seen, there is following effect in it:

1, the MAC-hs PDU of the invention can easily transmit IP grouping message efficiently.This is because can the IP message not carried out burst and polymerization at PDCP/RLC/MAC-d, so a MAC-d PDU just can carry entire I P grouping message.MAC-hs is actually burst and polymerization that an IP grouping message is carried out at burst and polymerization that MAC-d PDU carries out.Like this, in the scheduling of MAC-hs sends, can carry out rational burst and polymerization (burst and polymerization algorithm do not belong to scope of the present invention) to the IP message according to the current PDU length that can use.The LEN that defines in the MAC-hs head in the present invention is actual SDU length, SID with respect to the prior art definition is the index of length, burst is more flexible in the present invention, MAC-d PDU can be divided into the SDU of random length, has greatly improved the flexibility of transmission.Defined 4 kinds of SDU types and 4 kinds of SDU aggregate types, and the organization regulation of MAC-hs PDU, it is very simple to make that the burst of MAC-hs and polymerization implement, in the reorganization of receiving terminal with decompose also very simple.Therefore, the MAC-hs PDU of the invention can easily transmit IP grouping message efficiently.

2, when the big IP of transmission divided into groups message, owing to do not carry out burst at RLC/MAC-d, an IP message had only a RLC/MAC-d head, with respect to prior art 1, has reduced the number of RLC/MAC-d head, has increased the utilance of wireless channel.This be because, in the prior art, the MAC-d PDU length of General Definition is 320 bits (40 byte) or 640 bits (80 byte), if an IP grouping is 1200 bytes, adopt the technical scheme of prior art then to need just need transmit 30/15 RLC/MAC-d head on wireless channel with 30 or 15 MAC-dPDU, each RLC head is minimum to be 2 bytes, add the MAC-d head of 4 bits, with regard to minimum needs 600 bits/300 bits.And among the present invention, only need a MAC-d PDU, have only a RLC/MAC-d head, and,, add 8 bit MAC-d heads so the RLC head has only 2 bytes because a MAC-d PDU comprises entire I P message, only need 24 bits, improved 25 or 12.5 times than prior art.The length of SDU leader is than long 2 bits of prior art among the present invention, but LEN is that sign is the length of unit with the byte among the present invention, can be fit to long IP message well and lack the IP message.In IP network, the longest general IP message can not surpass 1500 bytes, just can transmit this IP message with two SDU leaders among the present invention.Use the SDU leader of 15 bits than prior art more at most, but lacked the RLC/MAC-d head of 576/276 bit, saved the bandwidth of at least 561/261 bit.Therefore for one 1200 IP message, relative to existing technologies, the present invention can save 5.8% or 2.7% bandwidth.

3, by the present invention, even under the bad situation of radio channel state, NodeB also can become the length that is fit to current channel condition arbitrarily to transmit the transmitting real-time service message fragment, this waits for that with respect to needing in the prior art channel condition improvement could send, reduce the time delay of real-time service transmission greatly, thereby can improve the quality of real time business.For the message of other types of service, the situation that can't send for a long time can not appear waiting in the prior art 1 yet.And because the present invention can be divided into MAC-d PDU the SDU of random length, thereby can make full use of the bandwidth of wireless channel, especially under the bad situation of radio channel state, also can utilize fully.

4, other the present invention does not cancel the polymerizable functional of rlc layer, so when transmitting little non-real-time service message, RLC can carry out rational polymerization equally, so just can not increase the number of RLC/MAC-d head.

5, because rlc layer need not be deacclimatized the length restriction of MAC-d PDU, so not be used in the data that fill in the blanks among the RLCPDU.Simultaneously, because MAC-hs can be divided into message arbitrarily small SDU, so under many circumstances, data can fill in the blanks.These have all improved the transmission utilization ratio of wireless channel.

6, owing to when RB sets up, need not define the length of MAC-d PDU, so concerning RNC, need not be concerned about the size that is mapped to the professional IP message on the HSDPA, the information such as transmission frequency of message flow, thereby can reduce the complexity of system, improve the ability of professional expansion.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1, a kind of method by the high speed downlink packet access technology of HSDPA transmit IP message is characterized in that, comprising:

2, method according to claim 1 is characterized in that, described steps A specifically comprises:

After A1, IP message enter UTRAN, it is mapped to the PDCP SDU of PDCP layer;

3, method according to claim 2 is characterized in that, described steps A 3 specifically comprises:

Or,

4, according to claim 1,2 or 3 described methods, it is characterized in that described step B specifically comprises:

Or,

5, method according to claim 4 is characterized in that, described MAC-hs SDU comprises:

6, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type W type comprises: a complete MAC-d PDU.

7, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type H type comprises: a MAC-d PDU first burst after by the order burst.

8, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type M type comprises: the middle burst of a MAC-d PDU after by the order burst.

9, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type T type comprises: a MAC-d PDU last burst after by the order burst.

10, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type HTS type comprises:

Or,

11, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type HMS type comprises:

12, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type MMS type comprises:

13, method according to claim 5 is characterized in that, the MAC-hs SDU of described Type MTS type comprises:

14, method according to claim 4 is characterized in that, among the step B2, the process of constructing corresponding MAC-hs PDU based on described MAC-hs SDU specifically comprises:

15, method according to claim 14 is characterized in that, described structure principle comprises:

16, method according to claim 15 is characterized in that, described structure principle also comprises:

17, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

18, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

19, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

20, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

21, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

22, method according to claim 15 is characterized in that, described structure principle also comprises:

Or,

23, method according to claim 14 is characterized in that, described MAC-hs head specifically comprises:

VF, Queue ID, a TSN and at least one SDU leader;

Described VF is used for the expansion of MAC-hs;

Described TSN is used for identifying the serial number of a formation message;

24, method according to claim 23 is characterized in that, described SDU leader comprises:

A len field, a H field, a T field and a F field;

Described len field is used to represent corresponding SDU length;