CN101222289A - Walsh code distribution method and method - Google Patents

Walsh code distribution method and method Download PDF

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Publication number
CN101222289A
CN101222289A CNA2008100081018A CN200810008101A CN101222289A CN 101222289 A CN101222289 A CN 101222289A CN A2008100081018 A CNA2008100081018 A CN A2008100081018A CN 200810008101 A CN200810008101 A CN 200810008101A CN 101222289 A CN101222289 A CN 101222289A
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walsh
walsh code
service
data
data service
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万蓉
黄建中
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNA2008100081018A priority Critical patent/CN101222289A/en
Publication of CN101222289A publication Critical patent/CN101222289A/en
Priority to PCT/CN2009/070284 priority patent/WO2009097807A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/16Code allocation
    • H04J13/18Allocation of orthogonal codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/0007Code type
    • H04J13/004Orthogonal
    • H04J13/0048Walsh

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a Walsh code distribution method and a device thereof, which relates to the communication field; the invention aims to solve the problems that the prior art can not distribute a low-level Walsh code to a signal channel and further causes that a high-speed signal channel can not be provided in the process of uniformly distributing a Walsh code tree. The invention has the following technical proposal: the Walsh code distribution method: Walsh resource is pre-divided into a speech priority part and a data priority part; the method comprises that: a type of a newly accessed service is judged; when the newly accessed service is a speech service, a Walsh code is distributed to the speech service from the speech priority part; when the newly accessed service is a data service, the Walsh code is distributed to the data service from the data priority part. The Walsh code distribution method and the device provided by the embodiment of the invention can be not only applied to CDMA supply but also applied to other code division wireless communication systems.

Description

The distribution method of walsh code and device
Technical field
The present invention relates to the communications field, particularly a kind of distribution method of walsh code and device.
Background technology
(Code Division Multiple Access, be called for short: CDMA) in the system, the forward direction air interface links uses Walsh (Walsh) sign indicating number to encode, and different channels distributes different Walsh sign indicating numbers in the code division multiple access access.The generation method of Walsh sign indicating number is: 0 to be seed, level, vertical direction repeat 0, and diagonal is got 0 and mended, and recurrence like this is till the code word that generates required exponent number.As shown in Figure 1, the generation method according to the Walsh sign indicating number generates the highest Walsh sign indicating number that generates 64 rank.
The channel that cdma system forward direction air interface links is used for transport service comprises two kinds, is respectively: (Fundamental Channel is called for short: FCH) and complement channel (Supplemental Channel, abbreviation: SCH) primary channel.Wherein, the transmission rate of described FCH is fixed as 9.6kbps (1 times of speed), is used for the data service of transmitting voice service and low speed; The transmission rate of described SCH can be set to 9.6kbps (1 times of speed), 19.2kbps (2 times of speed), 38.4kbps (4 times of speed), 76.8kbps (8 times of speed) or 153.6kbps (16 times of speed), be used for transmitting data service, be mainly used in the transmitting high speed data business.When FCH is encoded, can use as one 64 rank Walsh sign indicating number among Fig. 1 and encode; When SCH is encoded, transmission rate is 9.6kbps, then use and encode as one 64 rank Walsh sign indicating number among Fig. 1, transmission rate is 19.2kbps, then use and encode as one 32 rank Walsh sign indicating number among Fig. 1, by that analogy, transmission rate is 153.6kbps, then uses and encodes as one 4 rank Walsh sign indicating number among Fig. 1.From to the process of SCH coding as can be seen, transmission rate is high more, and the Walsh sign indicating number exponent number of use is low more.In order to distribute low order Walsh sign indicating number for high speed SCH, as shown in Figure 1, need take under the described low order Walsh code tree that needs to distribute all high-order Walsh sign indicating number continuously.For example: when need being that the SCH of 76.8kbps is when distributing one 8 rank Walsh sign indicating number 0 for transmission rate, need under the code tree of 8 rank Walsh sign indicating number 0 correspondences among continuous dispensing Fig. 1,64 whole rank Walsh sign indicating numbers, that is: first to the 8th Walsh sign indicating number of 64 rank correspondences among Fig. 1 all need be distributed to SCH, just can make described SCH is 76.8kbps through coding back transmission rate.
In the cdma system, an important parameter judging signal transmission and systematic function quality is peak-to-average force ratio (peak-to-average power ratio, be called for short: PAR), described PAR is meant: in one section Measuring Time, and the root mean square ratio of the peak-peak of signal envelope and average power.When described PAR was higher, the range of linearity that signal amplitude exceeds power amplifier may appear in cdma system, and intermodulation distortion is raised, out of band spectrum regeneration, the system transmissions characteristic descends, and adjacent channel is produced disturb, power system capacity descends, perhaps problem such as systematic function reduction.Functional for guaranteeing cdma system, need reduce PAR as far as possible.
Show that by a large amount of tests and theory analysis the branch pairing PAR size of Walsh sign indicating number can impact.During the cdma system coding, the Walsh sign indicating number of use distributes even more in Walsh code tree shown in Figure 1, and then PAR is more little, otherwise then PAR is big more.In order to reduce PAR, guarantee the cdma system performance, when encoding, the Walsh sign indicating number of distribution is evenly distributed to the business (data service or speech business) of new access in Walsh code tree shown in Figure 1.A large amount of practical experiences show, when shown in Figure 18 rank Walsh sign indicating number uniform distributions, no matter whether uniform distribution of the Walsh sign indicating number in the 8 rank Walsh code trees, PAR under the various combination situation can be very approaching, can not occur owing to the Walsh sign indicating number distributes the uneven excessive problem of PAR under certain combined situation that causes.
Insert as new business, when needing to distribute the Walsh sign indicating number, prior art is selected to have distributed the minimum Walsh code tree of child node to distribute from 8 rank Walsh code trees, in described 8 rank Walsh code trees, be Walsh sign indicating number of traffic assignments of described new access by partner (Buddy) algorithm.Prior art is by from 8 rank Walsh code trees, the method that selection has distributed the minimum Walsh code tree allocation Walsh sign indicating number of child node, guaranteed the uniform distribution of 8 rank Walsh sign indicating numbers, thereby reached reduction PAR, guarantee the purpose of systematic function, in 8 exponents tree,, reached the purpose that reduces Walsh sign indicating number fragment by Buddy algorithm assigns Walsh sign indicating number.
In implementing process of the present invention, the inventor finds, prior art is in to 8 rank Walsh sign indicating number mean allocation, make the Walsh sign indicating number that has distributed the dispersion that in Walsh code tree as shown in Figure 1, distributes, because distributing, disperses described Walsh sign indicating number, can't be channel allocation low order Walsh sign indicating number so cause easily, and then cause the problem that IA High Speed Channel can't be provided.For the speech business among the FCH, its transmission rate is low, and the mean allocation method that prior art adopts can not exert an influence to the transmission rate of FCH.For the data service among the SCH, the channel transmission rate of its requirement may be higher, for example: 2 times of speed, 8 times of speed or 16 times of speed etc., obtain higher transmission rate in order to make described data service, need to use low order Walsh sign indicating number that the SCH channel is encoded.As shown in Figure 1, distribute low order Walsh sign indicating number, high-order Walsh sign indicating numbers whole under the low order Walsh code tree need be distributed to described SCH, thereby obtain high speed SCH in order to give described SCH.Prior art is distributed to whole Walsh sign indicating number resource in the process of speech business and data service according to the principle of mean allocation, the Walsh sign indicating number that speech business distributes may take the part high-order Walsh sign indicating number under each low order Walsh code tree, at this moment, can't be for data service distribute described low order Walsh sign indicating number, thus the problem that high speed SCH can't be provided for data service caused.For example: when 6 new business insert, the Walsh sign indicating number mean allocation principle that provides according to prior art, then can't for the traffic assignments 4 rank Walsh sign indicating numbers of described new access (because in the process of mean allocation, 64 rank Walsh sign indicating numbers under each 4 rank Walsh code tree have all partly been dispensed), that is: can't adopt the business of the described new access of speed rates of 16 times of speed.
Summary of the invention
Embodiments of the invention provide a kind of distribution method and device of walsh code, solve prior art and the Walsh code tree are being averaged in the process of distribution, can't be channel allocation low order Walsh sign indicating number, and then cause the problem that IA High Speed Channel can't be provided.
The embodiment that the present invention solves the problems of the technologies described above is: the distribution method of walsh code, in advance walsh codes resources is divided into voice priority section and high priority data part, and described method comprises: the type of judging new access service; When described new access service is speech business, be that described speech business distributes walsh code from the voice priority section; When described new access service is data service, partly be that described data service distributes walsh code from high priority data.
Another embodiment that the present invention solves the problems of the technologies described above is: the distributor of walsh code comprises:
The resource partitioning unit is used for walsh codes resources is divided into voice priority section and high priority data part;
The type of service judging unit is used to judge the type of new access service;
The walsh-code assignments unit is used for the type according to new access service, is that speech business distributes walsh code from the voice priority section, partly distributes walsh code for data service from high priority data.
Another embodiment that the present invention solves the problems of the technologies described above is: the base station comprises the distributor of described walsh code.
The distribution method of the walsh code that the embodiment of the invention provides and device, by Walsh sign indicating number resource is divided into voice priority section and high priority data part, reserved the Walsh sign indicating number resource of high priority data part for data service with high transfer rate, when distributing the Walsh sign indicating number, type according to new access service, from the voice priority section is that speech business distributes walsh code, partly distribute walsh code from high priority data for data service, when having solved prior art mean allocation Walsh sign indicating number unified in speech business and data service, because distributing, disperses the high-order Walsh sign indicating number that speech business takies, the low order Walsh sign indicating number of described high-order Walsh sign indicating number correspondence can't be provided for data service, thereby cause the problem that IA High Speed Channel can't be provided.Because speech business does not take the Walsh sign indicating number of high priority data part, so in the high priority data part, high-speed data service can take complete high-order Walsh sign indicating number, has guaranteed the transmission rate of data service, has reached the purpose that IA High Speed Channel is provided for data service.
Description of drawings
Fig. 1 is the binary tree structure figure of Walsh sign indicating number in the prior art;
The distribution method flow chart of the walsh code that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is the flow chart that data service distributes the Walsh sign indicating number for the distribution method of the walsh code that the embodiment of the invention among Fig. 2 provides;
The distributor structural representation of the walsh code that Fig. 4 provides for the embodiment of the invention.
Embodiment
The Walsh code tree is being averaged in the process of distribution in order to solve prior art, can't be channel allocation low order Walsh sign indicating number, and then cause the problem that IA High Speed Channel can't be provided, embodiments of the invention provide a kind of distribution method of walsh code.Below in conjunction with drawings and Examples the present invention is elaborated:
As shown in Figure 2, the distribution method of the walsh code that the embodiment of the invention provides comprises:
Step 201, in advance Walsh sign indicating number resource is divided into voice priority section and high priority data part, in the present embodiment, 8 rank Walsh code trees 0,4,2 and 6 shown in Figure 1 are arranged to the voice priority section, 8 rank Walsh code trees 1,5,3 and 7 are arranged to the high priority data part, in actual use, can divide as required;
Step 202 is judged the type of new access service, judges that the new business that inserts is speech business or data service that is:;
Step 203 is that speech business distributes the Walsh sign indicating number from the voice priority section, partly distributes the Walsh sign indicating number for data service from high priority data.
When the business of described new access is speech business, in order to reduce PAR, guarantee systematic function, present embodiment is according to the mean allocation principle, from the voice priority section is that speech business distributes the Walsh sign indicating number, its concrete steps comprise: from 8 rank Walsh code trees of voice priority section (that is: shown in Figure 18 rank Walsh code trees 0,4,2 and 6), select one to distribute the minimum Walsh code tree of child node; In the Walsh code tree of choosing, be that described speech business distributes a Walsh sign indicating number by the Buddy algorithm;
From the speech business priority section is that speech business distributes the process of Walsh sign indicating number, unsuccessful situation may appear distributing, for example: the voice priority section has not had idle Walsh sign indicating number resource, at this moment, the distribution method of the Walsh sign indicating number that the embodiment of the invention provides, can also partly be that described speech business distributes the Walsh sign indicating number from high priority data, its concrete distribution method be: from the high priority data part, be that described speech business distributes a Walsh sign indicating number by the Buddy algorithm.
When the business of described new access was data service, as shown in Figure 3, present embodiment partly comprised for data service distributes the step of Walsh sign indicating number from high priority data:
Step 301 is obtained the transmission rate of described data service;
Step 302, under 8 rank Walsh code trees, from high priority data part (that is: shown in Figure 18 rank Walsh code trees 1,5,3 and 7 parts), according to the data traffic transmission speed that obtains in the step 301, for described data service distributes the Walsh sign indicating number, its concrete steps comprise: from 8 rank Walsh code trees of high priority data part, select a Walsh code tree that satisfies described data traffic transmission speed; In the Walsh code tree of choosing, be that described data service distributes a Walsh sign indicating number by the Buddy algorithm;
Step 303, when step 302 can not be when high priority data partly distributes the Walsh sign indicating number of a data traffic transmission speed that satisfies described new access, from voice priority section and high priority data part, obtaining can be the pairing Walsh sign indicating number of the peak transfer rate resource that described data service distributes;
Step 304 in the pairing Walsh sign indicating number of the peak transfer rate resource of obtaining from step 303 that can distribute for described data service, is that described data service distributes the Walsh sign indicating number by the Buddy algorithm.
The distribution method of the walsh code that present embodiment provides, by Walsh sign indicating number resource is divided into voice priority section and high priority data part, reserved the Walsh sign indicating number resource of high priority data part for data service with high transfer rate, when distributing the Walsh sign indicating number, from the voice priority section is that speech business distributes the Walsh sign indicating number, partly distribute the Walsh sign indicating number from high priority data for data service, when having solved prior art mean allocation Walsh sign indicating number unified in speech business and data service, because distributing, disperses the high-order Walsh sign indicating number that speech business takies, the low order Walsh sign indicating number of described high-order Walsh sign indicating number correspondence can't be provided for data service, thereby cause the problem that IA High Speed Channel can't be provided.Because speech business does not generally take the Walsh sign indicating number of high priority data part (only when the voice priority section can not distribute the Walsh sign indicating number for speech business, just can take the Walsh sign indicating number of data finite part), so in the high priority data part, high-speed data service can take complete high-order Walsh sign indicating number, guaranteed the transmission rate of data service, when high priority data part can not be distributed a Walsh sign indicating number that satisfies its transmission rate for data service, the distribution method of the walsh code that the embodiment of the invention provides, can be the pairing Walsh sign indicating number of the peak transfer rate resource of described data service distribution by obtaining, be that described data service distributes the Walsh sign indicating number from this Walsh sign indicating number resource, realized that data service can obtain the purpose of higher transmission rates.
The Walsh code tree is being averaged in the process of distribution in order to solve prior art, can't be channel allocation low order Walsh sign indicating number, and then cause the problem that IA High Speed Channel can't be provided, embodiments of the invention provide a kind of distributor of walsh code.Below in conjunction with drawings and Examples the present invention is elaborated:
As shown in Figure 4, the distributor of the walsh code that the embodiment of the invention provides comprises:
The resource partitioning unit, be used for Walsh sign indicating number resource is divided into voice priority section and high priority data part, in the present embodiment, 8 rank Walsh code trees 0,4,2 and 6 shown in Figure 1 are arranged to the voice priority section, 8 rank Walsh code trees 1,5,3 and 7 are arranged to the high priority data part, in actual use, can divide as required;
The type of service judging unit is used to judge the type of new access service, judges that the new business that inserts is speech business or data service that is:;
The walsh-code assignments unit is used for the type according to new access service, is that speech business distributes the Walsh sign indicating number from the voice priority section, partly distributes the Walsh sign indicating number for data service from high priority data.
In the present embodiment, when the business of new access is speech business, when described voice priority section can not distribute the Walsh sign indicating number for speech business, described walsh-code assignments unit, can also partly distribute the Walsh sign indicating number from high priority data for speech business, wherein, can be described for the concrete steps of speech business distribution Walsh sign indicating number with reference to step 203 as shown in Figure 2, repeat no more herein; When the business of new access was data service, the distributor of described walsh code also comprised:
Data traffic transmission speed acquiring unit is used to obtain the transmission rate of data service;
Described walsh-code assignments unit, according to the transmission rate of described data service, partly for data service distributes the Walsh sign indicating number, its concrete allocation step can repeat no more referring to step 302 as shown in Figure 3 herein from high priority data;
When described walsh-code assignments unit can not be when high priority data partly distributes a Walsh sign indicating number that satisfies its transmission rate for described data service, the distributor of described walsh code also comprises:
Maximum code speed acquiring unit is used for from voice priority section and high priority data part, obtains to be the pairing Walsh sign indicating number of the peak transfer rate resource of described data service distribution;
Described walsh-code assignments unit in the pairing Walsh sign indicating number of the peak transfer rate resource of obtaining from described maximum code speed acquiring unit that can distribute for described data service, is that described data service distributes the Walsh sign indicating number.
In the present embodiment, the distributor of described walsh code not only can be an independent device, can also be positioned on the base station, realizes new access service is distributed the effect of Walsh sign indicating number.
The distributor of the walsh code that present embodiment provides, by Walsh sign indicating number resource is divided into voice priority section and high priority data part, reserved the Walsh sign indicating number resource of high priority data part for data service with high transfer rate, when distributing the Walsh sign indicating number, from the voice priority section is that speech business distributes the Walsh sign indicating number, partly distribute the Walsh sign indicating number from high priority data for data service, when having solved prior art mean allocation Walsh sign indicating number unified in speech business and data service, because distributing, disperses the high-order Walsh sign indicating number that speech business takies, the low order Walsh sign indicating number of described high-order Walsh sign indicating number correspondence can't be provided for data service, thereby cause the problem that IA High Speed Channel can't be provided.Because speech business does not generally take the Walsh sign indicating number of high priority data part (only when the voice priority section can not distribute the Walsh sign indicating number for speech business, just can take the Walsh sign indicating number of data finite part), so in the high priority data part, high-speed data service can take complete high-order Walsh sign indicating number, guaranteed the transmission rate of data service, when high priority data part can not be distributed a Walsh sign indicating number that satisfies its transmission rate for data service, the distributor of the walsh code that the embodiment of the invention provides, can be the pairing Walsh sign indicating number of the peak transfer rate resource of described data service distribution by obtaining, be that described data service distributes the Walsh sign indicating number from this Walsh sign indicating number resource, realized that data service can obtain the purpose of higher transmission rates.
The distribution method of the walsh code that the embodiment of the invention provides and device not only can be applied in during CDMA provides, can also be applied in other yards branch wireless communication system, when guaranteeing Walsh sign indicating number mean allocation, guarantee that data service can distribute higher speed.
The above; it only is the embodiment of the embodiment of the invention; but the protection range of the embodiment of the invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, the protection range of the embodiment of the invention should be as the criterion with the protection range of claim.

Claims (10)

1. the distribution method of a walsh code is characterized in that, in advance walsh codes resources is divided into voice priority section and high priority data part, and described method comprises:
Judge the type of new access service;
When described new access service is speech business, be that described speech business distributes walsh code from the voice priority section;
When described new access service is data service, partly be that described data service distributes walsh code from high priority data.
2. the distribution method of walsh code according to claim 1 is characterized in that, when described new access service was data service, described method also comprised:
Obtain the transmission rate of data service;
Describedly partly be:, partly be data service distribution walsh code from high priority data according to the transmission rate of described data service for data service distributes the step of walsh code from high priority data.
3. the distribution method of walsh code according to claim 2 is characterized in that, when can not also comprising from high priority data partly for described data service distributes when satisfying the walsh code of its transmission rate:
From voice priority section and high priority data part, be retrieved as the pairing walsh codes resources of peak transfer rate that described data service distributes;
From the described walsh codes resources of obtaining, for described data service distributes walsh code.
4. the distribution method of walsh code according to claim 1 is characterized in that, when described new access service was speech business, when not being described speech business when distributing walsh code from the voice priority section, described method also comprised:
Partly distribute walsh code from high priority data for speech business.
5. the distribution method of walsh code according to claim 1 is characterized in that,
Described is that speech business distributes the step of walsh code to comprise from the voice priority section: according to the mean allocation principle, be speech business distribution walsh code from the voice priority section.
6. the distributor of a walsh code is characterized in that, comprising:
The resource partitioning unit is used for walsh codes resources is divided into voice priority section and high priority data part;
The type of service judging unit is used to judge the type of new access service;
The walsh-code assignments unit is used for the type according to new access service, is that speech business distributes walsh code from the voice priority section, partly distributes walsh code for data service from high priority data.
7. the distributor of walsh code according to claim 6 is characterized in that, also comprises:
Data traffic transmission speed acquiring unit is used to obtain the transmission rate of data service;
Described walsh-code assignments unit is used for the transmission rate according to described data service, partly distributes walsh code for data service from high priority data.
8. the distributor of walsh code according to claim 7 is characterized in that, also comprises:
Maximum code speed acquiring unit is used for being retrieved as the pairing walsh codes resources of peak transfer rate that described data service distributes from voice priority section and high priority data part;
When can not be from high priority data partly for described data service distributes when satisfying the walsh code of its transmission rate,
Described walsh-code assignments unit is used for the walsh codes resources obtained from described, is that described data service distributes walsh code.
9. the distributor of walsh code according to claim 6 is characterized in that, when described new access service is speech business, and when can not being described speech business when distributing walsh code from the voice priority section,
Described walsh-code assignments unit also is used for partly distributing walsh code for speech business from high priority data.
10. base station is characterized in that: comprise the distributor as walsh code as described in any one of the claim 6 to 9.
CNA2008100081018A 2008-02-04 2008-02-04 Walsh code distribution method and method Pending CN101222289A (en)

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PCT/CN2009/070284 WO2009097807A1 (en) 2008-02-04 2009-01-22 Method and equipment for allocating walsh code

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2009097807A1 (en) * 2008-02-04 2009-08-13 Huawei Technologies Co., Ltd. Method and equipment for allocating walsh code

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BRPI0114892B1 (en) * 2000-10-24 2017-06-20 Microsoft Technology Licensing, Llc A method of communicating through a code division multiple access access system, a method for informing a particular user if an existing one of a shared data channel contains data for a user and a wireless terminal
US7411899B2 (en) * 2001-04-06 2008-08-12 Samsung Electronics Co. Ltd. Apparatus and method for allocating walsh codes to access terminals in an adaptive antenna array CDMA wireless network
KR20040036226A (en) * 2002-10-24 2004-04-30 엘지전자 주식회사 Method For Allocating Forward Code Channel In Mobile Communication System
CN1780187B (en) * 2004-11-19 2010-04-28 华为技术有限公司 Wolsh code distribution
CN101222289A (en) * 2008-02-04 2008-07-16 华为技术有限公司 Walsh code distribution method and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009097807A1 (en) * 2008-02-04 2009-08-13 Huawei Technologies Co., Ltd. Method and equipment for allocating walsh code

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Application publication date: 20080716