CN101594284A - A kind of media access control (MAC) frame of long evolving system - Google Patents
A kind of media access control (MAC) frame of long evolving system Download PDFInfo
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- CN101594284A CN101594284A CNA2008100675092A CN200810067509A CN101594284A CN 101594284 A CN101594284 A CN 101594284A CN A2008100675092 A CNA2008100675092 A CN A2008100675092A CN 200810067509 A CN200810067509 A CN 200810067509A CN 101594284 A CN101594284 A CN 101594284A
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Abstract
The invention discloses a kind of media access control (MAC) frame of long evolving system, comprise MAC head and MAC load successively, described MAC head comprises some MAC heads, each MAC head comprises the Logic Channel Identifier field, whether also there is other MAC E field after identifying this MAC head, R field, the L field of the MAC load length that sign MAC head is indicated and identify the F field of corresponding L field length, described R field is used to identify the number of its place MAC MAC load of indicating, and the number of described L field is consistent with the number of the MAC load of described MAC head indication.Technical scheme of the present invention has been saved interface-free resources.
Description
Technical field
The present invention relates to a kind of frame, MAC (Media Access Control, the medium access control) frame of especially a kind of LTE (Long Term Evolution, long evolving system).
Background technology
The raising day by day of rate requirement and the continuous development of mobile communication technology under user's mobile environment, and the introducing of novel radio system have impelled the develop rapidly of LTE.
3GPP TS 36.321 V8.0.0 protocol versions have been stipulated the structure of mac frame, and as shown in Figure 1, mac frame comprises MAC head and MAC load two parts.The MAC head comprises some MAC heads, and the MAC load comprises some MAC Control Elements (MAC control information) and MACSDU (MAC Service Data Unit, Medium Access Control (MAC) Service Data Unit) successively; A MAC head is indicated a MAC SDU or MAC Control Elements.Each MAC head comprises LCID (Logical Channel Identity, Logic Channel Identifier) field, whether also have E (expansion) field, R (reservation) field of other MAC head and L (length) field that identifies the MAC load length of its indication after identifying this MAC head, reach F (form) field that identifies the L field length.Specifically comprise three kinds of situations of Fig. 2, Fig. 3 and Fig. 4.
Fig. 2 is the MAC head of 7bit for the L field; Fig. 3 is the MAC head of 15bit for the L field, and Fig. 4 is the MAC head of 0bit for the L field.When having other MAC after this MAC of E field identification head, the L field is 7bit or 15bit, and its length is identified by the F field of 1bit; When not having other MAC after this MAC of E field identification head, adopt the MAC header structure of Fig. 4, L field and F field are 0bit, promptly can infer length by overall budget length this moment, do not need the L field.
In real system, that comprise among the MAC SDU is RLC (Radio Link Control, Radio Link control) PDU (Protocol Data Unit, protocol Data Unit).RLC PDU is divided into data and controls two kinds, with the indication of D/C field, D representative data, and C representative control (regulation mainly is exactly the state bag in the present agreement).For a logic channel, packet and state bag can be concatenated into a bag respectively, but both can not mix serial connection.Therefore, need two MAC heads in the mac frame, indicate the packet and the state bag of a logic channel respectively, and two MAC heads have identical LCID.Similarly, indicate two MACControl Elements of same logic channel also to need two MAC heads, will cause the waste of interface-free resources like this, reduce the efficient of MAC with identical LCID.
Summary of the invention
The technical problem to be solved in the present invention provides the mac frame of a kind of LTE, has saved interface-free resources.
The technical solution adopted for the present invention to solve the technical problems is:
The mac frame of a kind of LTE, comprise MAC head and MAC load successively, described MAC head comprises some MAC heads, each MAC comprises the Logic Channel Identifier field, identifies the F the field whether sub-head of this MAC also exists the L field of the E field of other MAC head, R field, a sign MAC MAC load length of indicating afterwards and identify corresponding L field length, described R field is used to identify the number of its place MAC MAC load of indicating, and the number of described L field is consistent with the number of the MAC load of described MAC head indication.
In the such scheme, described R field utilizes the MAC load of the described MAC head of 1bit Data Identification indication to be one or two.
In the such scheme, the MAC load of the described MAC head of described 1bit Data Identification indication is one, and when also having other MAC after the described MAC head of described E field identification, the L field that described MAC head comprises is 7bit or 15bit, and corresponding F field is 1bit.
In the such scheme, the MAC load of the described MAC head of described 1bit Data Identification indication is one, and when not having other MAC after the described MAC head of described E field identification, the L field that described MAC head comprises is 0bit, and corresponding F field is 0bit.
In the such scheme, when the MAC load of the described MAC head of described 1bit Data Identification indication was two, the previous L field of two L fields that described MAC head comprises was 7bit or 15bit, and corresponding F field is 1bit.
In the such scheme, when the MAC load of the described MAC head of described 1bit Data Identification indication is two, if have other MAC head after the described MAC head of described E field identification, a back L field of two L fields that described MAC head comprises is 7bit or 15bit, and corresponding F field is 1bit; If do not have other MAC head after the described MAC head of described E field identification, a described back L field is 0bit, and corresponding F field is 0bit.
In the such scheme, described 1bit data are 0 o'clock, and the MAC load of described MAC head indication is one; Described 1bit data are 1 o'clock, and the MAC load of described MAC head indication is two.
In the such scheme, described MAC load is two the MAC SDU or the MAC Control Elements of or corresponding same logic channel.
Beneficial effect of the present invention mainly shows: mac frame provided by the invention can be indicated two MAC Control Elements or two MAC SDU that comprise packet and state bag respectively of a logic channel with a MAC head, thereby saved interface-free resources, improved the efficient of MAC.
Description of drawings
Fig. 1 is the mac frame structural representation;
MAC header structure schematic diagram when Fig. 2 is 7bit for existing L field;
MAC header structure schematic diagram when Fig. 3 is 15bit for existing L field;
MAC header structure schematic diagram when Fig. 4 is 0bit for existing L field;
MAC header structure schematic diagram when Fig. 5 is 7bit for two L fields of the present invention;
MAC header structure schematic diagram when Fig. 6 is 15bit for two L fields of the present invention;
MAC header structure schematic diagram when Fig. 7 is followed successively by 7bit, 15bit for two L fields of the present invention;
MAC header structure schematic diagram when Fig. 8 is followed successively by 15bit, 7bit for two L fields of the present invention;
MAC header structure schematic diagram when Fig. 9 is followed successively by 7bit, 0bit for two L fields of the present invention;
MAC header structure schematic diagram when Figure 10 is followed successively by 15bit, 0bit for two L fields of the present invention.
Embodiment
Fig. 1 is described in background technology, repeats no more herein.The invention will be further described below in conjunction with other accompanying drawing.
Among the present invention, the basic structure of mac frame is constant, comprise MAC head and MAC load successively, the MAC head comprises some MAC heads, and each MAC comprises the LCID field, identifies the F the field whether sub-head of this MAC also exists the L field of the E field of other MAC head, R field, a sign MAC MAC load length of indicating afterwards and identify corresponding L field length; And, two the MAC SDU or the MAC Control Elements of corresponding same logic channel also indicate by MAC, promptly a MAC head can be indicated a MAC SDU or MACControl Elements, also can indicate two the MAC SDU or the MAC Control Elements of corresponding same logic channel, the number of utilizing the 1bit data (being designated as the N field) of R field to identify the MAC load of its place MAC head indication in mac frame is one or two, and the number of L field is consistent with the number of MAC MAC load of indicating.Wherein, N can be by following value:
N gets 0: the number that identifies the MAC load of its place MAC head indication is one
1: the number that identifies the MAC load of its place MAC head indication is two
Therefore, N got 0 o'clock, and the structure of MAC head is three kinds of situations of Fig. 2 to Fig. 4: when also having other MAC after the E field identification MAC head, MAC head comprises a L field, its length is 7bit shown in Figure 2 or 15bit shown in Figure 3, and corresponding F field is 1bit; When not having other MAC after the E field identification MAC head, the L field that MAC head comprises is 0bit, and corresponding F field is 0bit, and situation promptly shown in Figure 4 does not need L and F field this moment.
There are six kinds of situations of Fig. 5 to Figure 10 in the structure that N gets 1 o'clock MAC head, is illustrated respectively below.
1, with reference to Fig. 5, there is other MAC head after the E field identification MAC head, the previous L field of two L fields that MAC head comprises is 7bit, corresponding F field is 1bit; The L field in back is 7bit, and corresponding F field is 1bit;
2, with reference to Fig. 6, there is other MAC head after the described MAC head of E field identification, the previous L field of two L fields that MAC head comprises is 15bit, corresponding F field is 1bit; The L field in back is 15bit, and corresponding F field is 1bit;
3, with reference to Fig. 7, there is other MAC head after the described MAC head of E field identification, the previous L field of two L fields that MAC head comprises is 7bit, corresponding F field is 1bit; The L field in back is 15bit, and corresponding F field is 1bit;
4, with reference to Fig. 8, there is other MAC head after the described MAC head of E field identification, the previous L field of two L fields that MAC head comprises is 15bit, corresponding F field is 1bit; The L field in back is 7bit, and corresponding F field is 1bit;
5, with reference to Fig. 9, there is not other MAC head after the described MAC head of E field identification, the previous L field of two L fields that MAC head comprises is 7bit, corresponding F field is 1bit; The L field in back is 0bit, and corresponding F field is 0bit, promptly only needs a L field this moment;
6, with reference to Figure 10, there is not other MAC head after the described MAC head of E field identification, the previous L field of two L fields that MAC head comprises is 15bit, corresponding F field is 1bit; The L field in back is 0bit, and corresponding F field is 0bit, promptly only needs a L field this moment.
Under normal conditions, for each bar logic channel, can save 1 sub-head of byte MAC, therefore, the present invention has saved interface-free resources, and has simplified handling process, in the processing procedure, can single treatment the MAC load of an intact logic channel correspondence.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (8)
1, a kind of media access control (MAC) frame of long evolving system, comprise medium access control head and medium access control load successively, described medium access control head comprises the sub-head of some medium access controls, each medium access control head comprises the Logic Channel Identifier field, identify these medium access control head and whether also have the E field of other medium access control head afterwards, reserved field, the length field of the medium access control load length of identification medium access control head indication and identify the F field of corresponding length field length, it is characterized in that: described reserved field is used to identify the number of its place medium access control medium access control load of indicating, and the number of described length field is consistent with the number of the medium access control load of described medium access control head indication.
2, the media access control (MAC) frame of long evolving system as claimed in claim 1 is characterized in that: described reserved field utilizes the medium access control load of described medium access control of 1bit Data Identification head indication to be one or two.
3, the media access control (MAC) frame of long evolving system as claimed in claim 2, it is characterized in that: the medium access control load of described medium access control of described 1bit Data Identification head indication is one, and when also having other medium access control after the described medium access control of the described E field identification head, the length field that described medium access control head comprises is 7bit or 15bit, and corresponding F field is 1bit.
4, the media access control (MAC) frame of long evolving system as claimed in claim 2, it is characterized in that: the medium access control load of described medium access control of described 1bit Data Identification head indication is one, and when not having other medium access control after the described medium access control of the described E field identification head, the length field that described medium access control head comprises is 0bit, and corresponding F field is 0bit.
5, the media access control (MAC) frame of long evolving system as claimed in claim 2, it is characterized in that: when the medium access control load of described medium access control of described 1bit Data Identification head indication is two, the previous length field of two length fields that described medium access control head comprises is 7bit or 15bit, and corresponding F field is 1bit.
6, the media access control (MAC) frame of long evolving system as claimed in claim 2, it is characterized in that: when the medium access control load of described medium access control of described 1bit Data Identification head indication is two, if have the sub-head of other medium access control after described medium access control of the described E field identification head, a back length field of two length fields that described medium access control head comprises is 7bit or 15bit, and corresponding F field is 1bit; If do not have the sub-head of other medium access control after described medium access control of the described E field identification head, a described back length field is 0bit, and corresponding F field is 0bit.
7, as the media access control (MAC) frame of one of them described long evolving system of claim 2 to 6, it is characterized in that: described 1bit data are 0 o'clock, and the medium access control load of described medium access control head indication is one; Described 1bit data are 1 o'clock, and the medium access control load of described medium access control head indication is two.
8, the media access control (MAC) frame of long evolving system as claimed in claim 1 is characterized in that: described medium access control load is two the medium access control Service Data Units or the control information of or corresponding same logic channel.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111393A (en) * | 2009-12-24 | 2011-06-29 | 华为技术有限公司 | Data message transmission method and communication device |
| WO2012130050A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Wireless communication method, sending device and receiving device |
| CN103379543A (en) * | 2012-04-23 | 2013-10-30 | 普天信息技术研究院有限公司 | Data transmission method based on TD-LTE |
| CN104301934A (en) * | 2013-07-16 | 2015-01-21 | 普天信息技术研究院有限公司 | Method of transmitting data |
| US9391760B2 (en) | 2011-03-31 | 2016-07-12 | Beijing Nufront Mobile Multimedia Technology Co., Ltd | Method and device for accessing wireless network |
| WO2018053685A1 (en) * | 2016-09-20 | 2018-03-29 | 富士通株式会社 | Data encapsulation method and device, and communication system |
| CN113133097A (en) * | 2020-01-16 | 2021-07-16 | 深圳市胜斯智能技术有限责任公司 | Wireless communication method and system |
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2008
- 2008-05-28 CN CNA2008100675092A patent/CN101594284A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111393A (en) * | 2009-12-24 | 2011-06-29 | 华为技术有限公司 | Data message transmission method and communication device |
| CN102111393B (en) * | 2009-12-24 | 2014-06-04 | 华为技术有限公司 | Data message transmission method and communication device |
| WO2012130050A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Wireless communication method, sending device and receiving device |
| US9240974B2 (en) | 2011-03-31 | 2016-01-19 | Beijing Nufront Mobile Multimedia Technology Co., Ltd. | Wireless communication method, sending device and receiving device |
| US9391760B2 (en) | 2011-03-31 | 2016-07-12 | Beijing Nufront Mobile Multimedia Technology Co., Ltd | Method and device for accessing wireless network |
| CN103379543A (en) * | 2012-04-23 | 2013-10-30 | 普天信息技术研究院有限公司 | Data transmission method based on TD-LTE |
| CN103379543B (en) * | 2012-04-23 | 2016-06-15 | 普天信息技术研究院有限公司 | A kind of data transmission method based on TD-LTE |
| CN104301934A (en) * | 2013-07-16 | 2015-01-21 | 普天信息技术研究院有限公司 | Method of transmitting data |
| WO2018053685A1 (en) * | 2016-09-20 | 2018-03-29 | 富士通株式会社 | Data encapsulation method and device, and communication system |
| CN113133097A (en) * | 2020-01-16 | 2021-07-16 | 深圳市胜斯智能技术有限责任公司 | Wireless communication method and system |
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