CN102237947A - Format-optimized MAC (Media Access Control) packet determination method and system - Google Patents
Format-optimized MAC (Media Access Control) packet determination method and system Download PDFInfo
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- CN102237947A CN102237947A CN2010101541976A CN201010154197A CN102237947A CN 102237947 A CN102237947 A CN 102237947A CN 2010101541976 A CN2010101541976 A CN 2010101541976A CN 201010154197 A CN201010154197 A CN 201010154197A CN 102237947 A CN102237947 A CN 102237947A
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Abstract
The invention discloses a format-optimized MAC (Media Access Control) packet determination method which is implemented in a way that: determining an ACMAC (Access Channel Media Access Control) packaging format which can be supported by the terminal and network between the terminal side and the network side, wherein the ACMAC packaging format comprises variable-length ACMAC packaging format. The invention also discloses a format-optimized MAC (Media Access Control) packet determination system which comprises a determination unit for determining the ACMAC packaging format which can be supported by the terminal and network, wherein the ACMAC packaging format comprises variable-length ACMAC packaging format. By using the method and system disclosed by the invention, data can be transmitted after optimizing the packaging of the ACMAC so as to support the scene of low-rate transmission.
Description
Technical field
The present invention relates to the communications field, relate in particular to definite method and system of the MAC bag that form is optimized in a kind of access channel.
Background technology
In code division multiple access (CDMA) wireless communication system, data by the airlink transmission need be through the encapsulation of protocol stack, need add the head and tail of this protocol layer correspondence during each layer that is data by the transmit leg protocol stack, need remove the head and tail of this protocol layer correspondence during each layer by recipient's protocol stack of data, thus the transmission process of standard and reduced data.But this packaged type also brings a problem, because encapsulation layer by layer, the format information that a large amount of resources is used to transmit these encapsulation is an Overhead, cause really can be used for a resource shrinkage of transfer of data, the efficient of transfer of data is reduced greatly, particularly under the situation of low rate, this situation is even more serious.Table 1 as follows is the Overhead statistical form of access channel bag, and when therefrom an access channel wrapped in transmission as can be seen, its Overhead had taken 120 bits, does not comprise the physical layer encapsulation overhead.Wherein, to take the Overhead maximum of medium access control (MAC) layer encapsulation, reach 96 bits especially.Here, each character that relates in the his-and-hers watches 1 describes: ACMAC refers to an access the channel medium access control; FCS refers to Frame Check Sequence; Connection layer refers to articulamentum; PCP refers to the packet encapsulation agreement; Stream refers to stream; SLP refers to the signaling link agreement; SNP refers to the signaling network agreement.
| Numbering | Describe | Bit number | Protocol layer |
| 1 | ACMAC+FCS | 96 | ACMAC |
| 2 | Connection layer head | 8 | PCP |
| 3 | The Stream head | 2 | Stream |
| 4 | The SLP head | 6 | SLP |
| 5 | The SNP head | 8 | SNP |
Table 1
The Overhead that present ACMAC seals dress comprises two parts, i.e. MAC head and MAC tail.Wherein, the MAC tail is the Frame Check Sequence of 32 bits, is used for error control, the verification on corresponding 32 rank of 32 bits and (CRC) function, and exponent number high reliability more is high more.For example, CRC32 is lower than CRC16 probability of errors.The MAC head is made of the information of 64 bits, is mainly used in to distinguish different accessing terminal, and specifying information as shown in the following Table 2.Here, each character that relates in the his-and-hers watches 2 describes: Length refers to length; SecurityLayerFormat refers to the encryption layer form; ConnectionLayerFormat refers to the articulamentum form.
| Field | Length (bits) |
| Length | 8 |
| SessionConfigurationToken | 16 |
| SecurityLayerFormat | 1 |
| ConnectionLayerFormat | 1 |
| ProbeNumber | 4 |
| ATI?Record | 34 |
Table 2
Supported the speed type of access channel that four kinds of 9.6kbps, 19.2kbps, 38.4kbps and 76.8kbps are arranged in the cdma wireless communication system, consider Application Expansion in the future, support that the demand of lower access rate is also clear and definite gradually, for example, 2.4kbps and 4.8kbps.Following table 3 is access channel speed and corresponding efficiency of transmission table.Here it is to be noted: efficiency of transmission is contained in the frame with data envelope and is transmitted as example herein, does not consider the burst situation.
| Transmission rate (kbps) | ACMAC maximum load (bits) | ACMAC encapsulation overhead (bits) | ACMAC efficiency of transmission (%) | Overhead (bits) | The minimum burst number of ACMAC |
| 2.4 | 40 | 96 | Can't transmit | 120 | 4 |
| 4.8 | 104 | 96 | 8％ | 120 | 2 |
| 9.6 | 232 | 96 | 59％ | 120 | 1 |
| 19.2 | 488 | 96 | 80％ | 120 | 1 |
| 38.4 | 1000 | 96 | 90％ | 120 | 1 |
| 76.8 | 2024 | 96 | 95％ | 120 | 1 |
Table 3
From above-mentioned table 3 as can be seen: the head/tail information of existing MAC encapsulation is based on existing higher data speed design, it can guarantee the transmission under higher access channel speed, but can't guarantee the transmission under the low rate, mainly be because the Overhead of existing ACMAC encapsulation is excessive, thereby cause under the low rate situation, can't transmitting at all or efficiency of transmission very low, therefore, new demand is: in order to support the scene of lower rate transmissions, transmit data again after must being optimized the encapsulation of ACMAC.Yet, do not have effective solution as yet at this new demand.
Summary of the invention
In view of this, main purpose of the present invention is to provide definite method and system of the MAC bag that a kind of form optimizes, and transmits data again after being optimized the encapsulation of ACMAC, to support the scene of lower rate transmissions.
For achieving the above object, technical scheme of the present invention is achieved in that
Definite method of the MAC bag that a kind of form is optimized, this method comprises: determine access channel medium access control (ACMAC) encapsulation format that terminal and network can be supported between end side and network side; Wherein, described ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
Wherein, the ACMAC encapsulation format of described variable length is corresponding to the needs of different scenes; This method also comprises: under the scene of lower rate transmissions or non-moving transmission, described terminal adopts the ACMAC encapsulation format of the described variable length corresponding with described scene respectively, sends to described network again after packet is encapsulated.
Wherein, during ACMAC encapsulation format that described definite terminal and network can be supported, this method also comprises: determine by parameter whether terminal and network side support the ACMAC encapsulation format of described variable length; If terminal or network are not supported the ACMAC encapsulation format of variable length, then terminal adopts existing ACMAC encapsulation format transmission access channel data; If terminal and network are all supported the ACMAC encapsulation format of variable length, then terminal adopts the ACMAC encapsulation format transmission access channel data of variable length.
Wherein, when described terminal and network were all supported the ACMAC encapsulation format of variable length, this method also comprised: determine the length of each information field in the described ACMAC form and/or the function length that described ACMAC tail form is adopted by parameter.
Wherein, the ACMAC encapsulation format of described variable length comprises: the ACMAC tail form of the ACMAC of a variable length form and/or variable length.
Wherein, in the described ACMAC form, the length sum of all fields can not surpass the defined length of Length field.
Wherein, described ACMAC tail form, the frame number check length that can support comprises: 8 bits, 16 bits or 32 bits correspond respectively to the verification on 8 rank, 16 rank or 32 rank and (CRC) function.
Wherein, described parameter is: the ability parameter of the ACMAC encapsulation format ability of the variable length that sign terminal and/or network can be supported.
A kind of MAC of form optimization wraps fixed system really, and this system comprises: determining unit is used for the ACMAC encapsulation format of determining that terminal and network can be supported; Wherein, described ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
Wherein, this system also comprises: transmitting element, be used under the scene in comprising lower rate transmissions or non-moving being transmitted in, described terminal adopts the ACMAC encapsulation format of the described variable length corresponding with described scene respectively, sends to described network again after packet is encapsulated.
Wherein, described determining unit is further used for determining by parameter whether terminal and network side support the ACMAC encapsulation format of described variable length; Described parameter is: the ability parameter of the ACMAC encapsulation format ability of the variable length that sign terminal and/or network can be supported;
This system also comprises transmission unit, and when being used for terminal or network and not supporting the ACMAC encapsulation format of variable length, terminal adopts existing ACMAC encapsulation format transmission access channel data; When terminal and network were all supported the ACMAC encapsulation format of variable length, terminal adopted the ACMAC encapsulation format transmission access channel data of variable length.
Between end side of the present invention and network side, determine the ACMAC encapsulation format that terminal and network can be supported; Wherein, the ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
Owing to when the present invention determines the ACMAC encapsulation format, allow to support the ACMAC encapsulation format of variable length, the encapsulation format of existing ACMAC optimized, therefore, adopt the present invention, transmit data again after the encapsulation of ACMAC is optimized, can support the scene of lower rate transmissions.
Description of drawings
Fig. 1 is the negotiation schematic flow sheet of the ACMAC form transmission package of optimization of the present invention.
Embodiment
Basic thought of the present invention is: when determining the ACMAC encapsulation format, allow to support the ACMAC encapsulation format of variable length.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
Main purpose of the present invention is the new ACMAC encapsulation format that obtains a kind of optimization, so that effectively support low rate or the non-moving transfer of data of terminal on access channel, improves the data transmission efficiency of access channel simultaneously.That is to say that the present invention can also support the scene of non-moving transmission except supporting the scene of lower rate transmissions.The present invention is different from prior art and adopts fixing ACMAC encapsulation format, but according to current concrete transmission needs, such as, can be by the interactive mode of consulting between end side and network side, to determine variable ACMAC encapsulation format, to adapt to the transfer of data under the different application scene as required, improve data transmission efficiency.Determine that variable ACMAC encapsulation format can also adopt: the interactive mode of base station broadcast and terminal monitoring, to determine variable ACMAC encapsulation format.Here it is to be noted: determine the mode of variable ACMAC encapsulation format between end side and network side, the interactive mode of interactive mode that is not limited to consult and broadcasting and monitoring.
At the scene of non-moving transmission, consider that existing ACMAC encapsulation format is the scene that moves and switch for suitable terminal, the session identification that terminal recognition and terminal are used is the unique sign of the overall situation; And the present invention considers that machine is to machine (M2M, machine-to-machine) a large amount of non-moving scene in the application, can simplify the session identification of terminal recognition and terminal use, guarantee to get final product at the unique identification of single sector, therefore, the present invention is based on the consideration of this angle, and encapsulation is optimized to ACMAC.Below specifically set forth.
Definite method of the MAC bag that a kind of form is optimized mainly comprises following content:
Allow the ACMAC encapsulation format of variable length, comprise a form and/or the tail form of the ACMAC of variable length.The ACMAC encapsulation format of described variable length is: the ACMAC encapsulation format after the present invention optimizes.
The length sum of the format fields of the ACMAC of all variable lengths can not surpass the defined length of Length field.
Each field of ACMAC head after the optimization is as shown in the following Table 4:
| Field | Length (bits) |
| Length | 8 |
| SessionConfigurationToken | variable |
| SecurityLayerFormat | variable |
| ConnectionLayerFormat | variable |
| ProbeNumber | variable |
| ATI?Record | variable |
Table 4
For ACMAC tail form, support the frame number check length can be 8 bits, 16 bits or 32 bits, corresponding to the CRC function on 8 rank, 16 rank or 32 rank.
By parameter, determine whether end side and network side support the ACMAC encapsulation format of variable length; If end side or network side are not supported the ACMAC encapsulation format of variable length, then end side adopts original ACMAC encapsulation format transmission access channel data; If end side and network side are supported the ACMAC encapsulation format of variable length, then end side adopts the ACMAC encapsulation format transmission access channel data of variable length.This section parameter that relates to is an ability parameter, is used to characterize the ACMAC encapsulation format ability of the variable length that terminal and/or network can support, does not give unnecessary details.Here it is to be noted: the parameter that relates in the described ability parameter of this section and following " determining the length of each information field in ACMAC the form and/or the function length that ACMAC tail form is adopted by parameter " is different implication.
Wherein, when the ACMAC encapsulation format of end side and network side support variable length, determine the length of each information field in ACMAC the form and/or the function length that ACMAC tail form is adopted by parameter.
At ACMAC form, in ACMAC the form, the length of each field is determined by following parameter:
One, the length of SessionConfigurationToken can determine that SessionTokenLength is the field of redetermination of the present invention by SessionTokenLength, adopts when being negotiation, and SessionTokenLength as shown in the following Table 5.
| SessionTokenLength | Implication |
| 0 | SessionConfigurationToken length is 16 bits |
| 1 | SessionConfigurationToken length is 4 bits |
| 2 | SessionConfigurationToken length is 0 bit |
| Other | Keep |
Table 5
Two, access terminal that can to consult the length of the ATID value used by ATIDLength or end side and base station side definite for the length of identifier (ATID), wherein, ATIDLength also is the field of redetermination of the present invention, and ATIDLength as shown in the following Table 6.
| ATIDLength | Implication |
| 0 | ATID length is 34 bits |
| 1 | ATID length is 24 bits |
| 2 | ATID length is 20 |
| 3 | ATID length is 16 bits |
| Other | Keep |
Table 6
Three, the length of ProbeNumber can determine that ProbeNumberLength also is the field of redetermination of the present invention by ProbeNumberLength, and ProbeNumberLength as shown in the following Table 7.
| ?ProbeNumberLength | Implication |
| ?0 | ProbeNumber length is 4 bits |
| ?1 | ProbeNumber length is 0 bit |
Table 7
Four, the length of SecurityLayerFormat can determine that SecurityLayerFormatLength also is the field of redetermination of the present invention by SecurityLayerFormatLength, and SecurityLayerFormatLength as shown in the following Table 8.
| ?SecurityLayerFormatLength | Implication |
| ?0 | SecurityLayerFormat length is 1 bit |
| ?1 | SecurityLayerFormat length is 0 bit |
Table 8
Five, the length of ConnectionLayerFormat can determine that ConnectionLayerFormatLength also is the field of redetermination of the present invention by ConnectionLayerFormatLength, and ConnectionLayerFormatLength is as shown in table 9 below.
| ?ConnectionLayerFormatLength | Implication |
| ?0 | ConnectionLayerFormat length is 1 bit |
| ?1 | ConnectionLayerFormat length is 0 bit |
Table 9
At ACMAC tail form, the function length that ACMAC tail form is adopted is determined by following method:
Short bag adopts the tail form length of 8 bits or 16 bits or 32 bits, and long bag adopts the tail form length of 32 bits.The tail form length that the length definition of the short long bag of access channel and short long bag adopt is determined by parameter by terminal and network.
1, ShortPacketLength is used for determining the length of short bag;
2, FCSLength is used for determining the short long access channel tail form length that is adopted of wrapping, as shown in the following Table 10.
| ?FCSLength | Implication |
| ?0 | FCS length is 32 bits |
| ?1 | FCS length is 16 bits |
| ?2 | FCS length is 8 bits |
| Other | Keep |
Table 10
Below to the present invention's elaboration of giving an example.Fig. 1 is the flow chart according to the embodiment of the invention, and as shown in Figure 1, this method may further comprise the steps:
Step 101: access terminal and Access Network between, finish inserting the assignment and the establishment of connection of eating dishes without rice or wine of terminal recognition.
Step 102: access terminal and Access Network between carry out session negotiation, and determine to access terminal and the ACMAC encapsulation format of the optimization that can support of Access Network.
Here, this determines that operation comprises determining of each field length in the head or tail form of ACMAC encapsulation format.
Step 103: discharge and eat dishes without rice or wine to connect.
Step 104: when the low volume data that accessed terminal need send, select access channel to transmit, and send the access channel data bag by the ACMAC encapsulation format of optimizing.
In sum, adopt solution of the present invention, can improve the transmission digit rate of data greatly, go for the scene of lower rate transmissions or the scene of non-moving transmission.Data in following employing table 11 and the table 12 are confirmed superiority of the present invention.Wherein, table 11 is the access channel speed and the corresponding efficiency of transmission table of comparisons, and the efficiency of transmission here is contained in the frame with data envelope and is transmitted as example, does not consider the burst situation; Table 12 is contained in data envelope here and is transmitted as example in the physical frame for the ACMAC encapsulation overhead and the efficiency of transmission table of comparisons thereof before and after optimizing, does not also consider the situation of burst.
| Transmission rate (kbps) | Maximum load (bits) | Optimize the minimum encapsulation overhead (bits) of back ACMAC | Optimize back maximum transmitted efficient (%) | Optimize the minimum burst number of back ACMAC |
| 2.4 | 40 | 32 | 20％ | 2 |
| 4.8 | 104 | 32 | 69％ | 1 |
| 9.6 | 232 | 32 | 86％ | 1 |
| 19.2 | 488 | 32 | 93％ | 1 |
| 38.4 | 1000 | 32 | 97％ | 1 |
| 76.8 | 2024 | 32 | 98％ | 1 |
Table 11
| Transmission rate (kbps) | Maximum load (bits) | Efficiency of transmission (%) before optimizing | Optimize back maximum transmitted efficient (%) | The minimum burst number of ACMAC before optimizing | Optimize the minimum burst number of back ACMAC |
| 2.4 | 40 | - | 20％ | 4 | 2 |
| 4.8 | 104 | 8％ | 69％ | 2 | 1 |
| 9.6 | 232 | 59％ | 86％ | 1 | 1 |
| 19.2 | 488 | 80％ | 93％ | 1 | 1 |
| 38.4 | 1000 | 90％ | 97％ | 1 | 1 |
| 76.8 | 2024 | 95％ | 98％ | 1 | 1 |
Table 12
A kind of MAC of form optimization wraps fixed system really, and this system comprises determining unit, and determining unit is used for the ACMAC encapsulation format of determining that terminal and network can be supported.Wherein, the ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
Here, this system also comprises transmitting element, transmitting element is used under the scene in comprising lower rate transmissions or non-moving being transmitted in, and described terminal adopts the ACMAC encapsulation format of the described variable length corresponding with described scene respectively, sends to described network again after packet is encapsulated.
Here, determining unit is further used for determining by parameter whether terminal and network side support the ACMAC encapsulation format of described variable length.Parameter is: the ability parameter of the ACMAC encapsulation format ability of the variable length that sign terminal and/or network can be supported.
Here, this system also comprises transmission unit, and transmission unit is used for terminal or network when not supporting the ACMAC encapsulation format of variable length, and terminal adopts existing ACMAC encapsulation format transmission access channel data; When terminal and network were all supported the ACMAC encapsulation format of variable length, terminal adopted the ACMAC encapsulation format transmission access channel data of variable length.
Here, the literal that relates in above and the accompanying drawing is described: access terminal and to represent with AT; Access Network can be represented with AN.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1. definite method of the MAC bag of a form optimization is characterized in that this method comprises: determine access channel medium access control (ACMAC) encapsulation format that terminal and network can be supported between end side and network side; Wherein, described ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
2. method according to claim 1 is characterized in that, the ACMAC encapsulation format of described variable length is corresponding to the needs of different scenes; This method also comprises: under the scene of lower rate transmissions or non-moving transmission, described terminal adopts the ACMAC encapsulation format of the described variable length corresponding with described scene respectively, sends to described network again after packet is encapsulated.
3. method according to claim 1 is characterized in that, during ACMAC encapsulation format that described definite terminal and network can be supported, this method also comprises: determine by parameter whether terminal and network side support the ACMAC encapsulation format of described variable length; If terminal or network are not supported the ACMAC encapsulation format of variable length, then terminal adopts existing ACMAC encapsulation format transmission access channel data; If terminal and network are all supported the ACMAC encapsulation format of variable length, then terminal adopts the ACMAC encapsulation format transmission access channel data of variable length.
4. method according to claim 3, it is characterized in that, when described terminal and network were all supported the ACMAC encapsulation format of variable length, this method also comprised: determine the length of each information field in the described ACMAC form and/or the function length that described ACMAC tail form is adopted by parameter.
5. method according to claim 1 is characterized in that, the ACMAC encapsulation format of described variable length comprises: the ACMAC tail form of the ACMAC of a variable length form and/or variable length.
6. method according to claim 5 is characterized in that, in the described ACMAC form, the length sum of all fields can not surpass the defined length of Length field.
7. method according to claim 5 is characterized in that, described ACMAC tail form, and the frame number check length that can support comprises: 8 bits, 16 bits or 32 bits correspond respectively to the verification on 8 rank, 16 rank or 32 rank and (CRC) function.
8. method according to claim 3 is characterized in that, described parameter is: the ability parameter of the ACMAC encapsulation format ability of the variable length that sign terminal and/or network can be supported.
9. the MAC of a form optimization wraps fixed system really, it is characterized in that, this system comprises: determining unit is used for the ACMAC encapsulation format of determining that terminal and network can be supported; Wherein, described ACMAC encapsulation format comprises: the ACMAC encapsulation format of variable length.
10. system according to claim 9, it is characterized in that, this system also comprises: transmitting element, be used under the scene in comprising lower rate transmissions or non-moving being transmitted in, described terminal adopts the ACMAC encapsulation format of the described variable length corresponding with described scene respectively, sends to described network again after packet is encapsulated.
11. system according to claim 9 is characterized in that, described determining unit is further used for determining by parameter whether terminal and network side support the ACMAC encapsulation format of described variable length; Described parameter is: the ability parameter of the ACMAC encapsulation format ability of the variable length that sign terminal and/or network can be supported;
This system also comprises transmission unit, and when being used for terminal or network and not supporting the ACMAC encapsulation format of variable length, terminal adopts existing ACMAC encapsulation format transmission access channel data; When terminal and network were all supported the ACMAC encapsulation format of variable length, terminal adopted the ACMAC encapsulation format transmission access channel data of variable length.
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| CN103188739A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Transmission method of frame in network and transmission device of frame in network |
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| WO2007035048A2 (en) * | 2005-09-21 | 2007-03-29 | Lg Electronics Inc. | A method of enabling a combined data rate control lock channel in a wireless communication system |
| CN101243716A (en) * | 2005-06-16 | 2008-08-13 | 高通股份有限公司 | Quick paging channel with reduced probability of missed page |
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| CN101243716A (en) * | 2005-06-16 | 2008-08-13 | 高通股份有限公司 | Quick paging channel with reduced probability of missed page |
| WO2007035048A2 (en) * | 2005-09-21 | 2007-03-29 | Lg Electronics Inc. | A method of enabling a combined data rate control lock channel in a wireless communication system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188739A (en) * | 2011-12-30 | 2013-07-03 | 中兴通讯股份有限公司 | Transmission method of frame in network and transmission device of frame in network |
| WO2013097711A1 (en) * | 2011-12-30 | 2013-07-04 | 中兴通讯股份有限公司 | Frame transmission method and device in network |
| CN103188739B (en) * | 2011-12-30 | 2017-10-10 | 中兴通讯股份有限公司 | The transmission method and device of frame in network |
| US9838907B2 (en) | 2011-12-30 | 2017-12-05 | Xi'an Zhongxing New Software Co. Ltd. | Methods and devices for transmitting frame in network |
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