CN101242347B

CN101242347B - Method for mapping logic channel data to high-speed physical downlink share channel and transmitting it

Info

Publication number: CN101242347B
Application number: CN2007100075629A
Authority: CN
Inventors: 柯雅珠; 程翔
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2007-02-06
Filing date: 2007-02-06
Publication date: 2011-06-22
Anticipated expiration: 2027-02-06
Also published as: CN101242347A

Abstract

The invention provides a transmitting method for mapping logical channel to a high speed physical down share channel, wherein (1) a high speed down share channel media access controlling entity seals a control head comprising n high speed down share channel media access control sub heads of a dedicated control logical channel or a dedicated service logical channel and n high speed down share channel media access control operation data units corresponding to n control sub heads to a media access control protocol data unit, wherein n is a natural number, and the control sub heads are put at front of the corresponding media access control operation data units, comprising: a logical channel identification number for identifying the logical channel sent to here; a data unit length representing the size of wireless chain circuit control heads and effective loads; a sectional identification for identifying a sectional number of upper layer data; and a district wireless network temporary identification number for identifying the user equipment; and (2) the sealed media access control protocol data unit is transmitted in a high speed down share channel.

Description

Logical channel data is mapped to the method that high-speed physical downlink shared channel (HS-PDSCH) sends

Technical field

The present invention relates to a kind of method that logical channel data is mapped to the high-speed physical downlink shared channel (HS-PDSCH) transmission.

Background technology

In order to improve the throughput of high data traffic of user and system, the R5 standard agreement of 3GPP has been introduced a kind of high-speed packet and has been shared transmission channel (High Speed Downlink Shared Channel: high speed shared channels), the physical channel that this channel shone upon adopts time-division and sign indicating number branch mode, and this channel has adopted and has mixed (HARQ) and Adaptive Modulation and Coding (AMC) technology of retransmitting automatically, makes peak rate can reach 10.8Mbps～30Mbps.Its final purpose is by providing high speed packet service to be inserted the capacity that increases system and reduces transmission delay, thereby, improve the requirement of user to service quality (Qos).

The 3GPP consensus standard to Radio Resource control (RRC) connection mode down front access state (CELL_FACH) and (or) Radio Resource control (RRC) connection mode paging state (CELL_PCH/URA_PCH) down strengthens, promptly CELL_FACH and (or) CELL_PCH/URA_PCH also can use high speed downlink packet to insert (HSDPA) technology (will be in CELL-FACH and (or) CELL_PCH/URA_PCH state use and share grouping access (HSDPA) technology at a high speed and abbreviate reinforcement connection mode common condition as) at this.When subscriber equipment was in reinforcement connection mode common condition, the data of public control logic channel (CCCH), special-purpose control logic channel (DCCH), dedicated service logic channel (DTCH), multimedia control logic channel (MCCH) and multimedia service logic channel logic channels such as (MTCH) all can be mapped on the high-speed physical downlink shared channel (HS-PDSCH) and send.

For the DCCH/DTCH logic channel, if continue to use the medium access control head of the various logical channels in existing MAC-c/sh/m and the MAC-hs entity, as shown in Figure 1, then a medium access control shared bandwidth will the more proportion (head of DCCH/DTCH logic channel is at least the 23+21 bit) of accounting.Therefore, need packaged media access control protocol data cell again, the data of logic channel can be mapped on the high-speed physical downlink shared channel (HS-PDSCH) send, and make medium access control head take less bandwidth.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method that logical channel data is mapped to the high-speed physical downlink shared channel (HS-PDSCH) transmission, can reduce a medium access control shared bandwidth, can also make the data of a plurality of subscriber equipmenies in a Transmission Time Interval, on a high-speed physical downlink shared channel (HS-PDSCH), receive data simultaneously.

In order to address the above problem, the present invention proposes and a kind of logical channel data is mapped to the method that high-speed physical downlink shared channel (HS-PDSCH) sends, may further comprise the steps:

(1) medium access control entity of high speed descending sharing channel is encapsulated in the media access control protocol data unit with the control head that comprises n high speed descending sharing channel medium access control head of special-purpose control logic channel or dedicated service logic channel with a n control n corresponding respectively high speed descending sharing channel medium access control Service Data Unit, described n is a natural number, described control head is placed on before the respective media access control Service Data Unit, at least comprise: Logic Channel Identifier number, being used to identify is the data that send over from which special-purpose control logic channel or dedicated service logic channel; Data unit length is represented the size of Radio Link control head and payload; Divide segment identification, be used to indicate the fragment number of the last layer data of media access control layer; Cell-radio network temporary identifier is used for identifying user equipment;

(2) packaged media access control protocol data unit is sent on high speed descending sharing channel.

Further, said method also can have following characteristics: in the step (1), described control head also comprises version sign, and described version sign is encapsulated in before first control head.

Further, said method also can have following characteristics: during step (1) encapsulation, when medium access control head added n group media access control Service Data Unit sum less than the total length of media access control protocol data unit, then in the end the afterbody of a medium access control Service Data Unit used filler to fill.

Further, said method also can have following characteristics: in the step (1), described control head and medium access control Service Data Unit are staggered and control son head and the corresponding adjacent setting of medium access control Service Data Unit, also comprise the data indication in each control head, be used to indicate follow-up whether also have control head and corresponding medium access control Service Data Unit; Perhaps control head is placed on the front entirely, after described control head,, comprise also in each control head that being used to indicate follow-up is the medium access control head or the sign of medium access control Service Data Unit by arranging the corresponding service data cell with the same sequence of control head.

Further, said method also can have following characteristics: in the step (2), described medium access control head and high speed descending sharing channel medium access control Service Data Unit are variable-lengths.

Compared with prior art, the inventive method is fit to special-purpose control logic channel (DCCH) and dedicated service logic channel (DTCH) is mapped to high speed descending sharing channel media access control protocol entity, can reduce a medium access control shared bandwidth, can also make the data of a plurality of subscriber equipmenies in a Transmission Time Interval, on a high-speed physical downlink shared channel (HS-PDSCH), receive data simultaneously.

Description of drawings

Fig. 1 is that prior art DCCH/DTCH is mapped to the MAC-hs structure chart on the HS-DSCH.

Fig. 2 is the structure chart of media access control protocol data unit in first example.

Fig. 3 is the structure chart of media access control protocol data unit in second example.

Embodiment

The invention provides under a kind of suitable reinforcement connection mode common condition, make special-purpose control logic channel (DCCH) and dedicated service logic channel (DTCH) be mapped to the method that high-speed physical downlink shared channel (HS-PDSCH) sends.

The present invention is described in further detail below in conjunction with drawings and Examples.

A kind of logical channel data is mapped to the method that high-speed physical downlink shared channel (HS-PDSCH) sends, as shown in Figure 2, may further comprise the steps:

Step 110, medium access control entity (MAC-hs) by high speed descending sharing channel is encapsulated in the media access control protocol data unit with the control head that comprises n high speed descending sharing channel medium access control head of special-purpose control logic channel (DCCH) or dedicated service logic channel (DTCH) with a n control n corresponding respectively high speed descending sharing channel medium access control Service Data Unit, described control head is placed on before the respective media access control Service Data Unit, described control head comprises Logic Channel Identifier number (logical channel id) at least, data unit length (length), cell-radio network temporary identifier (C-RNTI) divides segment identification (SC);

Wherein, Logic Channel Identifier number is 4 bits, and being used to identify is the data that send over from which logic channel, and its span is 0～15; Data unit length is 11 bits, represents the size of Radio Link control (RLC) head and payload, is the length of each control head medium access control Service Data Unit corresponding with it, and its span is 0～2047; Segmentation is designated 2 bits, the segmentation identification number that is used to indicate the medium access control entity of high speed descending sharing channel that the last layer data are carried out segmentation, UE according to this minute segment identification receive merging; Comprised C-RNTI in the MAC-hs pdu head of DCCH/DTCH, then can come the identifying user equipment UE by C-RNTI, the data of different UEs just can be encapsulated among the MAC-hs pdu and send, so, a plurality of UE just can receive this MAC-hs pdu simultaneously in a Transmission Time Interval, and receive one's own data on a high-speed physical downlink shared channel (HS-PDSCH).

Described control head can also comprise version sign (VF), is 1 bit, the effective mac-hspdu of 0 representative, and 1 representative keeps; When comprising version sign, this version sign is encapsulated in before first control head.

First example

As shown in Figure 2, described control head and medium access control Service Data Unit are staggered and control son head and the corresponding adjacent setting of medium access control Service Data Unit, also comprise the data indication in each control head, be used to indicate follow-up whether also have control head and corresponding medium access control Service Data Unit.

Second example

As shown in Figure 3, described control head is arranged in the front entirely, after described control head, arrange the corresponding service data cell, comprise also in each control head that being used to indicate follow-up is the medium access control head or the sign of medium access control data cell by the same sequence of control head.

Step 120, when medium access control head adds n group media access control Service Data Unit sum less than the total length of media access control protocol data unit, then in the end the afterbody of a medium access control Service Data Unit uses Padding (filler) to fill, and described n is a natural number.

Described n control son head is corresponding n medium access control Service Data Unit, described medium access control head and high speed descending sharing channel medium access control Service Data Unit all are variable-lengths, and in a protocol Data Unit, each control head or Service Data Unit can be unequal.

The total length of media access control protocol data unit is that predefined is good in the agreement, can be with reference to this consensus standard, add under the situation of n group media access control Service Data Unit sum smaller or equal to the total length of media access control protocol data unit at the medium access control head that guarantees encapsulation, the length value of as far as possible selecting the total length with media access control protocol data unit to be close compares, and adds filler.

Step 130 sends packaged media access control protocol data unit on high speed descending sharing channel.

Should be understood that above-mentioned description at specific embodiment of the present invention is comparatively concrete, should not be defined in embodiment described in the invention.Those skilled in the art are when making corresponding distortion according to the present invention, and scope of patent protection of the present invention should be as the criterion with claims.

Claims

1. one kind is mapped to the method that high-speed physical downlink shared channel (HS-PDSCH) sends with logical channel data, may further comprise the steps:

2. method according to claim 1 is characterized in that:

In the step (1), described control head also comprises version sign, and described version sign is encapsulated in before first control head.

3. method according to claim 1 is characterized in that:

During step (1) encapsulation, when medium access control head added n group media access control Service Data Unit sum less than the total length of media access control protocol data unit, then in the end the afterbody of a medium access control Service Data Unit used filler to fill.

4. method according to claim 1 is characterized in that:

In the step (1), described control head and medium access control Service Data Unit are staggered and control son head and the corresponding adjacent setting of medium access control Service Data Unit, also comprise the data indication in each control head, be used to indicate follow-up whether also have control head and corresponding medium access control Service Data Unit;

Perhaps control head is placed on the front entirely, after described control head,, comprise also in each control head that being used to indicate follow-up is the medium access control head or the sign of medium access control Service Data Unit by arranging the corresponding service data cell with the same sequence of control head.

5. as method as described in the claim 3, it is characterized in that:

In the step (2), described medium access control head and high speed descending sharing channel medium access control Service Data Unit all are variable-lengths.