CN101436886A - Method for dynamic regulation of reverse link thermal noise recruitment threshold - Google Patents
Method for dynamic regulation of reverse link thermal noise recruitment threshold Download PDFInfo
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- CN101436886A CN101436886A CN 200710170352 CN200710170352A CN101436886A CN 101436886 A CN101436886 A CN 101436886A CN 200710170352 CN200710170352 CN 200710170352 CN 200710170352 A CN200710170352 A CN 200710170352A CN 101436886 A CN101436886 A CN 101436886A
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Abstract
The invention discloses a method for dynamically adjusting an increasing amount threshold value of thermal noise of a reverse link. The method comprises: step S102, preliminarily setting a maximum value MaxROT and a minimum value MinROT of the increasing amount threshold value of the thermal noise by a base station, and setting a maximum reverse user number M supported by a system at the same time; step S104, calculating a dynamic adjusting factor V according to predetermined algorithm; and step S106, adjusting the increasing amount threshold value of the thermal noise according to the dynamic adjusting factor V. Through the technical proposal, the method dynamically adjusts the increasing amount ROT threshold value of the thermal noise of the reverse link based on the current user number of the system, and solves the problems of interaction between stability of the current system and throughput.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to the method for dynamic adjustment reverse link hot noise increase ROT (rise-over-thermal) threshold value in a kind of HRPD (high rate packet data) (highrate packet data is called for short HPRD) communication system.
Background technology
At present, the HRPD system increases power system capacity in order to reduce transmitting power as much as possible, has adopted rate control techniques.According to Shannon's theorem, under the certain prerequisite of frequency range, when signal to noise ratio (Signal-to-noise Ratio is called for short SNR) was low, system guaranteed to meet the requirements of capacity C (Capacity) by increasing the method for transmitting power, and this is called power control.In contrast, in the HRPD system, when the signal to noise ratio snr of system can not guarantee certain capacity C, system reduced capacity C, promptly reduces data rate, and this is called rate controlled.Power control is benefited for the connection of circuit types, but can reduce throughput of system when carrying out Packet data service, so, in HRPD system, adopted the mechanism of rate controlled at Packet data service.
In order to adopt the method for rate controlled, the HRPD system has increased rate indicator channel at forward direction, i.e. Reverse Activity bit (Reverse Active Bit, be called for short RAB) channel comes the reverse user's of control system transmission rate with this channel.When the system reverse load surpassed certain threshold value (that is, reverse link hot noise increase), by this channel notification terminal, terminal reduced emission rate by the canonical algorithm of C.S0024A agreement; If the load of system does not surpass this threshold value, then by this channel notification terminal, terminal improves emission rate by the canonical algorithm of C.S0024A agreement.
In current HRPD system, this threshold value is just default before a base station side work fixed value.Generally speaking, when too high ROT threshold value can cause the number of users of the unsteadiness of system, particularly system too much, but low excessively ROT threshold value can seriously reduce the throughput of system again.Under the situation of many reality, the ROT threshold value conservatively is provided with, and satisfying certain stability of a system, thereby has caused low excessively throughput of system, to such an extent as to the stability of system and throughput mutual restriction.
Summary of the invention
For solving an above-mentioned difficult problem, this paper has proposed a kind of dynamic adjustment reverse link hot noise increase (ROT) threshold method.
Method according to dynamic adjustment reverse link hot noise increase threshold of the present invention comprises following processing: step S102, the base station preestablishes the maximum MaxROT and the minimum M inROT of hot noise increase threshold, the maximum reverse number of users M of initialization system support simultaneously; Step S104 calculates dynamic adjusting factor V according to pre-defined algorithm; And step S106, adjust hot noise increase threshold according to dynamic adjusting factor V.
Wherein, dynamic adjusting factor V is an inverse relation with reverse number of users.
Preferably, dynamic adjusting factor V is linear inverse relation with reverse number of users.When having only a user in the system, dynamic adjusting factor is MaxROT/MinROT, and when M user arranged in the system, dynamic adjusting factor was MinROT/MaxROT.
Behind new user's access base station, hot noise increase threshold equals dynamic adjusting factor V and multiply by described minimum M inROT.
In addition, after step S106, also comprise following processing: step S108, the base station is calculated the Reverse Activity bit and is sent the Reverse Activity bit to terminal; And step S110, terminal is calculated the size of next emission packet and is sent.
Step S108 specifically comprises: the user launches packet; The Reverse Activity bit is calculated according to the hot noise increase threshold that is calculated in the base station; And the base station sends the Reverse Activity bit.
Step S110 specifically comprises: terminal receives the Reverse Activity bit; Terminal is calculated the size of next emission packet according to pre-defined algorithm; And terminal sends new packet.
By technical scheme of the present invention, dynamically adjust reverse link hot noise increase ROT threshold value based on the current number of users of system, solved the stability of present system and the problem of throughput mutual restriction.
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 being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart that illustrates according to the method for dynamic adjustment reverse link hot noise increase threshold of the present invention; And
Fig. 2 is the particular flow sheet that illustrates according to the method for the dynamic adjustment reverse link hot noise increase threshold of the embodiment of the 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, and be not used in qualification the present invention.
Fig. 1 is the flow chart that illustrates according to the method for dynamic adjustment reverse link hot noise increase threshold of the present invention.
With reference to Fig. 1, method according to dynamic adjustment reverse link hot noise increase threshold of the present invention comprises following processing: step S102, the base station preestablishes the maximum MaxROT and the minimum M inROT of hot noise increase threshold, the maximum reverse number of users M of initialization system support simultaneously; Step S104 calculates dynamic adjusting factor V according to pre-defined algorithm; And step S106, adjust hot noise increase threshold according to dynamic adjusting factor V.
Wherein, dynamic adjusting factor V is an inverse relation with reverse number of users.
Preferably, dynamic adjusting factor V is linear inverse relation with reverse number of users.When having only a user in the system, dynamic adjusting factor is MaxROT/MinROT, and when M user arranged in the system, dynamic adjusting factor was MinROT/MaxROT.
Behind new user's access base station, hot noise increase threshold equals dynamic adjusting factor V and multiply by described minimum M inROT.
In addition, after step S106, also comprise following processing: step S108, the base station is calculated the Reverse Activity bit and is sent the Reverse Activity bit to terminal; And step S110, terminal is calculated the size of next emission packet and is sent.
Step S108 specifically comprises: the user launches packet; The Reverse Activity bit is calculated according to the hot noise increase threshold that is calculated in the base station; And the base station sends the Reverse Activity bit.
Step S110 specifically comprises: terminal receives the Reverse Activity bit; Terminal is calculated the size of next emission packet according to pre-defined algorithm; And terminal sends new packet.
Below, with reference to Fig. 2 embodiments of the invention are described.
Fig. 2 is the particular flow sheet that illustrates according to the method for the dynamic adjustment reverse link hot noise increase threshold of the embodiment of the invention.Wherein, be example with HPRD system based on code division multiple access (Code DivisionMultiple Access is called for short CDMA) standard.
With reference to Fig. 2, in step 201, system carries out initialization, and algorithm begins.Then, in step 202, new subscriber access system.
In step 203, system is according to above-mentioned algorithm computation ROT threshold value.
In step 204, the user launches packet, and the RAB bit is calculated according to the ROT threshold value of calculating in the base station in step 103.In step 205, the base station sends the RAB bit to terminal then.
Next, in step 206, terminal is calculated the size of next emission bag according to the RAB bit that is received.At last, in step 207, terminal sends new packet.
By technical scheme of the present invention, dynamically adjust reverse link hot noise increase ROT threshold value based on the current number of users of system, solved the stability of present system and the problem of throughput mutual restriction.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, 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 protection scope of the present invention.
Claims (9)
1. method of dynamically adjusting reverse link hot noise increase threshold is characterized in that described method comprises following processing:
Step S102, the base station preestablishes the maximum MaxROT and the minimum M inROT of hot noise increase threshold, the maximum reverse number of users M of initialization system support simultaneously;
Step S104 calculates dynamic adjusting factor V according to pre-defined algorithm; And
Step S106 adjusts described hot noise increase threshold according to described dynamic adjusting factor V.
2. method according to claim 1 is characterized in that, described dynamic adjusting factor V is an inverse relation with reverse number of users.
3. method according to claim 2 is characterized in that, described dynamic adjusting factor V and described reverse number of users are linear inverse relation.
4. method according to claim 3 is characterized in that, when having only a user in the described system, described dynamic adjusting factor is MaxROT/MinROT.
5. method according to claim 3 is characterized in that, when M user arranged in the described system, described dynamic adjusting factor was MinROT/MaxROT.
6. method according to claim 3 is characterized in that, after new user inserted described base station, described hot noise increase threshold equaled described dynamic adjusting factor V and multiply by described minimum M inROT.
7. according to each described method in the claim 1 to 6, it is characterized in that, after described step S106, also comprise following processing:
Step S108, the base station is calculated the Reverse Activity bit and is sent described Reverse Activity bit to terminal; And
Step S110, described terminal is calculated the size of next emission packet and is sent.
8. method according to claim 7 is characterized in that, described step S108 specifically comprises:
The user launches packet;
Described Reverse Activity bit is calculated according to the hot noise increase threshold that is calculated in described base station; And
Described base station sends described Reverse Activity bit.
9. method according to claim 7 is characterized in that, described step S110 specifically comprises:
Described terminal receives described Reverse Activity bit;
Described terminal is calculated the size of next emission packet according to pre-defined algorithm; And
Described terminal sends new packet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710170352 CN101436886B (en) | 2007-11-12 | 2007-11-12 | Method for dynamic regulation of reverse link thermal noise recruitment threshold |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710170352 CN101436886B (en) | 2007-11-12 | 2007-11-12 | Method for dynamic regulation of reverse link thermal noise recruitment threshold |
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| CN101436886A true CN101436886A (en) | 2009-05-20 |
| CN101436886B CN101436886B (en) | 2012-12-19 |
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| CN 200710170352 Expired - Fee Related CN101436886B (en) | 2007-11-12 | 2007-11-12 | Method for dynamic regulation of reverse link thermal noise recruitment threshold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104885547A (en) * | 2013-01-05 | 2015-09-02 | 高通股份有限公司 | Multiple access scheme for multi-channels of a network with a limited link budget |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104885547A (en) * | 2013-01-05 | 2015-09-02 | 高通股份有限公司 | Multiple access scheme for multi-channels of a network with a limited link budget |
| CN104885547B (en) * | 2013-01-05 | 2018-10-02 | 高通股份有限公司 | Multi channel Multiple Access scheme for the network with finite link budget |
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| CN101436886B (en) | 2012-12-19 |
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