CN101227253B - Dynamic state altering method of enhancement type general use grouping wireless business encoder mode - Google Patents
Dynamic state altering method of enhancement type general use grouping wireless business encoder mode Download PDFInfo
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- CN101227253B CN101227253B CN2008100068418A CN200810006841A CN101227253B CN 101227253 B CN101227253 B CN 101227253B CN 2008100068418 A CN2008100068418 A CN 2008100068418A CN 200810006841 A CN200810006841 A CN 200810006841A CN 101227253 B CN101227253 B CN 101227253B
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Abstract
The invention provides a method for dynamically changing enhanced general grouped radio service encoded modes, which comprises a step S102, namely, selecting one of at least two encoded mode tables according to a modulation mode which is corresponded with a present encoded mode by a key station, wherein at least two encoded mode tables comprise a 8PSK encoded mode table and a GMSK encoded mode table, a step S104, namely, certifying a new encoded mode through inquiring a selected encoded mode according to the bit code error ratio and the bit code error ratio variance of data blocks which are transmitted by a mobile terminal by the key station and a step S 106, namely, communicating between the key station and the mobile terminal according to the new encoded mode, and thereby a mechanism for selecting various encoded modes of EGPRS is improved, which enables the transformation between various encoded modes to be comparatively smooth.
Description
Technical field
The present invention relates to the method that Enhanced GPRS in the gsm system (EGPRS) coded system dynamically changes.
Background technology
On the wave point of GPRS (GPRS) and Enhanced GPRS (EGPRS) system, data are transmitted by radio block.Each radio block is comprised of four continuous tdma frames on the channel, and each data block that sends by radio block need to be encoded first and modulate before transmission.The modulation system that GPRS adopts is GMSK, and EGPRS has adopted GMSK and two kinds of modulation systems of 8PSK.Under GMSK modulation mode, the information of 456 bits of carrying of each radio block, and under 8PSK modulation mode, therefore 3 * 456 bit informations of each radio block carrying, use 8PSK modulation mode can carry more valid data, improve transmission rate.After each data block that sends by radio block is encoded, form these 456 bits or 3 * 456 bits.GPRS has defined 4 kinds of coded systems, CS1～CS4, code rate is 9.05Kbps, 13.4Kbps, 15.6Kbps and 21.4Kbps respectively, EGPRS has defined 9 kinds of coded systems, MCS1～MCS9, data encoding speed is from 8.8Kbps to 59.2Kbps, and wherein MCS1～MCS4 uses GMSK modulation mode, and MCS5～MCS9 uses 8PSK modulation mode.
GPRS is in order to adapt to different wireless environment quality requirements with the Multi-encoding speed of EGPRS definition, at wireless quality preferably in the situation, can use the higher coded system of speed, improve the speed of wireless transmission, and in the poor place of wireless quality, use the lower coded system of speed, guarantee the reliability of wireless transmission.The selection of GPRS and EGPRS coded system is BSS (base station sub-system) control, and the basis of control is the wireless quality report that mobile phone or base station report.When carrying out gprs service, mobile phone carries descending wireless quality report in the grouping downlink response message, comprise level, credit rating, level variance and channel disturbance; When carrying out the EGPRS business, mobile phone carries descending wireless quality report in strengthening the grouping downlink response message, comprise level, bit error rate and bit error rate variance or channel disturbance, wherein bit error rate has defined 32 ranks, value 0 to 31, the error rate of expression from high to low, the bit error rate variance has defined 8 ranks, value 0 to 7, the error rate variance of expression from high to low.BSS selects suitable coded system according to the wireless quality that reports, and is professional for EGPRS, and agreement has advised a kind ofly selecting coded system according to bit error rate and bit error rate variance (form of MCS5～MCS9) seeing Table 1.(selection of MCS1～MCS4), and MCS1～MCS4 is to the conversion between MCS5～MCS9 coded system, agreement is not made an explanation for coded system.
Table 1
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is, a kind of dynamic change method of Enhanced GPRS coded system is provided, and it comprises:
Step S102, the base station one of is selected in two coded system tables according to the corresponding modulation system of present encoding mode at least, and wherein, at least two coded system tables comprise 8PSK coded system table and GMSK coded system table;
Step S104, bit error rate and the bit error rate variance of the data block that transmit according to portable terminal the base station are determined new coded system by inquiring about selected coded system table; And
Step S106 communicates according to new coded system between base station and the portable terminal.
The Enhanced GPRS coded system can comprise 9 kinds of coded systems, is respectively MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8 and MCS9.
8PSK coded system table can arrange coded system MCS4 in the higher zone of bit error rate and bit error rate variance, to realize the conversion from the 8PSK coded system to the GMSK coded system, if the present encoding mode is the 8PSK coded system, then according to bit error rate and bit error rate variance inquiry 8PSK coded system table, if new coded system is a kind of among MCS5, MCS6, MCS7, MCS8, the MCS9 then continues to carry out the 8PSK coded system, if new coded system is MCS4 then carries out the GMSK coded system.
GMSK coded system table can arrange coded system MCS5 in the lower zone of bit error rate and bit error rate variance, to realize the conversion from the GMSK coded system to the 8PSK coded system, if the present encoding mode is the GMSK coded system, then according to bit error rate and bit error rate variance inquiry GMSK coded system table, if new coded system be MCS1, MCS2, MCS3, MCS4, in a kind of then continue to carry out the GMSK coded system, if new coded system is MCS5 then carries out the 8PSK coded system.
In the present invention, determine respectively downlink coding mode and up coded system for down direction and up direction.
When determining downlink coding mode, before step S102, can also comprise: the base station indicating mobile terminal reports mode or reports mode to send with channel with Temporary Block Flow and carries the enhancing grouping downlink response message that descending wireless quality is reported; And the base station obtains bit error rate and bit error rate variance from strengthen the grouping downlink response message.In addition, can average processing to bit error rate and bit error rate variance.
Descending wireless quality report can comprise level, bit error rate and bit error rate variance or channel disturbance.
When determining up coded system, before step S102, can also comprise: the base station obtains each bit error rate of up, and the bit error rate in the scheduled time is averaged and get the variance processing, to obtain average bit error rate and bit error rate variance.
By technique scheme, the various coding mode selection mechanism of perfect EGPRS are so that the conversion between the various coded system is smoother.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the dynamic change method of Enhanced GPRS coded system of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Fig. 1 shows the flow chart according to the dynamic change method of Enhanced GPRS coded system of the present invention.
With reference to Fig. 1, a kind of dynamic change method of Enhanced GPRS coded system is provided, it comprises:
Step S102, the base station one of is selected in two coded system tables according to the corresponding modulation system of present encoding mode at least, and wherein, at least two coded system tables comprise 8PSK coded system table and GMSK coded system table;
Step S104, bit error rate and the bit error rate variance of the data block that transmit according to portable terminal the base station are determined new coded system by inquiring about selected coded system table; And
Step S106 communicates according to new coded system between base station and the portable terminal.
The Enhanced GPRS coded system can comprise 9 kinds of coded systems, is respectively MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8 and MCS9.
8PSK coded system table can arrange coded system MCS4 in the higher zone of bit error rate and bit error rate variance, to realize the conversion from the 8PSK coded system to the GMSK coded system, if the present encoding mode is the 8PSK coded system, then according to bit error rate and bit error rate variance inquiry 8PSK coded system table, if new coded system is a kind of among MCS5, MCS6, MCS7, MCS8, the MCS9 then continues to carry out the 8PSK coded system, if new coded system is MCS4 then carries out the GMSK coded system.
GMSK coded system table can arrange coded system MCS5 in the lower zone of bit error rate and bit error rate variance, to realize the conversion from the GMSK coded system to the 8PSK coded system, if the present encoding mode is the GMSK coded system, then according to bit error rate and bit error rate variance inquiry GMSK coded system table, if new coded system be MCS1, MCS2, MCS3, MCS4, in a kind of then continue to carry out the GMSK coded system, if new coded system is MCS5 then carries out the 8PSK coded system.
In the present invention, determine respectively downlink coding mode and up coded system for down direction and up direction.
When determining downlink coding mode, before step S102, can also comprise: the base station indicating mobile terminal reports mode or reports mode to send with channel with TBF (Temporary Block Flow) and carries the enhancing grouping downlink response message that descending wireless quality is reported; And the base station obtains bit error rate and bit error rate variance from strengthen the grouping downlink response message.In addition, can average processing to bit error rate and bit error rate variance.
Descending wireless quality report can comprise level, bit error rate and bit error rate variance or channel disturbance.
When determining up coded system, before step S102, can also comprise: the base station obtains each bit error rate of up, and the bit error rate in the scheduled time is averaged and get the variance processing, to obtain average bit error rate and bit error rate variance.
The below will describe exemplary embodiment of the present invention in more detail.
The invention provides two forms:
The first coding mode selection table: referring to table 2, mainly finish the coded system conversion between MCS5～MCS9, special in bit error rate and the higher zone of bit error rate, select coded system MCS4, realize the conversion from the 8PSK coded system to the GMSK coded system.
Table 2
The second coding mode selection table: referring to table 3, mainly finish the coded system conversion between MCS1～MCS4, special in bit error rate and the lower zone of bit error rate, select coded system MCS5, realize the conversion from the GMSK coded system to the 8PSK coded system.
Table 3
Particularly, performing step is as follows:
Down direction:
1. select to report mode (report or report according to channel according to TBF) according to link-quality the indication mobile phone.
2. the indication mobile phone reports descending response message.
3.BSS receive enhancement mode grouping downlink response message, after adopting average treatment or not adopting average treatment, the modulation system corresponding according to the downlink coding mode of current use, with bit error rate and the bit error rate variance in the corresponding measurement report, come question blank 2 and table 3, select at last the downlink coding mode that makes new advances:
If current use is the 8PSK mode, just according to bit error rate and bit error rate variance question blank 2, obtain new downlink coding mode, if new downlink coding mode is between MCS5～MCS9, also continue to adopt the 8PSK mode, if new downlink coding mode is MCS4, will transfer the GMSK mode to;
If current use is the GMSK mode, just according to bit error rate and bit error rate variance question blank 3, obtain new downlink coding mode, if new downlink coding mode is between MCS1～MCS4, also continue to adopt the GMSK mode, if new downlink coding mode is MCS5, will transfer the 8PSK mode to.
4. send downlink data block according to the new downlink coding mode coding of selecting.
Up direction:
1.BSS obtain each bit error rate of up.
2.BSS the bit error rate within a period of time is averaged and get variance to be processed.
3. the modulation system corresponding according to the up coded system of current use, and the bit error rate and the bit error rate variance that obtain are come question blank 2 and table 3, select the up coded system that makes new advances:
If current use is the 8PSK mode, just according to bit error rate and bit error rate variance question blank 2, obtain new up coded system, if new up coded system is between MCS5～MCS9, also continue to adopt the 8PSK mode, if new up coded system is MCS4, will transfer the GMSK mode to;
If current use is the GMSK mode, just according to bit error rate and bit error rate variance question blank 3, obtain new up coded system, if new up coded system is between MCS1～MCS4, also continue to adopt the GMSK mode, if new up coded system is MCS5, will transfer the 8PSK mode to.
4. use this up coded system at ascending response message indicating mobile phone.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the dynamic change method of an Enhanced GPRS coded system is characterized in that, comprising:
Step S102, the base station one of is selected in two coded system tables according to the corresponding modulation system of present encoding mode at least, and wherein, described at least two coded system tables comprise 8PSK coded system table and GMSK coded system table;
Step S 104, and bit error rate and the bit error rate variance of the data block that transmit according to portable terminal described base station are determined new coded system by inquiring about selected coded system table; And
Step S106 communicates according to described new coded system between described base station and the portable terminal;
Wherein, to determine that new coded system comprises at least one of following by inquiring about selected coded system table:
Described 8PSK coded system table arranges coded system MCS4 in the higher zone of described bit error rate and described bit error rate variance, to realize the conversion from described 8PSK coded system to described GMSK coded system, if described present encoding mode is described 8PSK coded system, then inquire about described 8PSK coded system table according to described bit error rate and described bit error rate variance, if new coded system is MCS5, MCS6, MCS7, MCS8, a kind of then continuation the among the MCS9 carried out described 8PSK coded system, if described new coded system is MCS4 then carries out described GMSK coded system;
Perhaps, described GMSK coded system table arranges coded system MCS5 in the lower zone of described bit error rate and described bit error rate variance, to realize the conversion from described GMSK coded system to described 8PSK coded system, if described present encoding mode is described GMSK coded system, then inquire about described GMSK coded system table according to described bit error rate and described bit error rate variance, if new coded system is MCS1, MCS2, MCS3, a kind of then continuation the among the MCS4 carried out described GMSK coded system, if described new coded system is MCS5 then carries out described 8PSK coded system.
2. dynamic change method according to claim 1 is characterized in that, described Enhanced GPRS coded system comprises 9 kinds of coded systems, is respectively MCS1, MCS2, MCS3, MCS4, MCS5, MCS6, MCS7, MCS8 and MCS9.
3. dynamic change method according to claim 1 is characterized in that, determines respectively downlink coding mode and up coded system for down direction and up direction.
4. dynamic change method according to claim 3 is characterized in that, when determining described downlink coding mode, before described step S102, also comprises:
Described base station is indicated described portable terminal to report mode or report mode to send with channel with Temporary Block Flow and is carried the enhancing grouping downlink response message that descending wireless quality is reported; And
Described base station obtains described bit error rate and described bit error rate variance from described enhancing grouping downlink response message.
5. dynamic change method according to claim 4 is characterized in that, described step S102 also comprises:
Described bit error rate and described bit error rate variance are averaged processing.
6. dynamic change method according to claim 4 is characterized in that, described descending wireless quality report comprises level, bit error rate and bit error rate variance or channel disturbance.
7. dynamic change method according to claim 3 is characterized in that, when determining described up coded system, before described step S102, also comprises:
Described base station obtains each bit error rate of up, and the described bit error rate in the scheduled time is averaged and get the variance processing, to obtain average bit error rate and bit error rate variance.
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| CN1875593A (en) * | 2003-11-07 | 2006-12-06 | 松下电器产业株式会社 | Radio communication apparatus and mcs deciding method |
| CN101047473A (en) * | 2006-06-16 | 2007-10-03 | 华为技术有限公司 | Data transmitting method |
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| CN1407746A (en) * | 2001-09-06 | 2003-04-02 | 华为技术有限公司 | Self adaptable adjusting method for modulating code mode |
| CN1414715A (en) * | 2001-10-24 | 2003-04-30 | 华为技术有限公司 | Method of regulating modulation code according to area |
| CN1849766A (en) * | 2003-09-08 | 2006-10-18 | 艾利森电话股份有限公司 | Modulation scheme management |
| CN1875593A (en) * | 2003-11-07 | 2006-12-06 | 松下电器产业株式会社 | Radio communication apparatus and mcs deciding method |
| CN101047473A (en) * | 2006-06-16 | 2007-10-03 | 华为技术有限公司 | Data transmitting method |
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