CN101277517A - Random access method and device - Google Patents
Random access method and device Download PDFInfo
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- CN101277517A CN101277517A CNA2007100888198A CN200710088819A CN101277517A CN 101277517 A CN101277517 A CN 101277517A CN A2007100888198 A CNA2007100888198 A CN A2007100888198A CN 200710088819 A CN200710088819 A CN 200710088819A CN 101277517 A CN101277517 A CN 101277517A
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Abstract
The present invention provides a method of random access, including step S102, an access channel is divided into multiple sub-class access channels according to the service classes; step S104, each sub class access channel is distributed with a medium resource; and step S106, a service to be accessed attempts to access, whether existing the sub class access channel corresponding to the class of the service to be accessed or not is judged according to the class of the service to be accessed, and processing corresponding operation according to the judging result. In addition, the invention also provides a random access device. The invention resolves reducing the collision probability of the submitted information transmitted by the user end, reducing the unnecessary occupation of the network capacity and waste of resource, and improving the access efficiency.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of accidental access method and device.
Background technology
In cellular system, has Random Access Channel (RACH).Random Access Channel is generally used for service request, position that user terminal (UE) carried out and moves the back to the network lastest imformation and the transmission of the signalings such as up link when pulling out electricity when start-up logging.
At present, realize that the core concept of RACH is: when remaining between the receiving-transmitting sides to deliver a letter the breath transmission, transmit leg takies Radio Resource randomly, sends information to be passed to the recipient, and wherein, Radio Resource can be frequency resource, time interval resource and code source etc.Its specific implementation method is: all information that may transmit among the RACH are classified, and different information classifications has different codeword set, and RACH has certain Radio Resource, and this resource is further divided, and obtains the RACH subchannel.
Here, transmit leg is user terminal normally, the recipient is the base station normally, user terminal is selected a code word randomly according to the classification of information to be passed from corresponding codeword set, and according to this code word generation solicitation message, when allowing to send this application message, user terminal is selected a RACH subchannel randomly, sends this application message.
After the base station receives this application message from the RACH subchannel, utilize code word and this application message in the codeword set to carry out coherent detection, obtain the code word that user terminal uses, then, the base station generates acknowledge message according to this code word again, returns to user terminal, this acknowledge message can be the message that expression allows to send or refuse transmission, the previous code word of selecting of user terminal utilization oneself can obtain the affirmation message of base station, if allow to send, then user terminal sends its message to be passed; If refusal sends, then user terminal finishes the RACH process.
When two user terminal selecting during the same code word of same RACH subchannel and identical information classification set, will bump the reception solicitation message that the base station can not be correct or return acknowledge message.
The advantage of RACH is to possess the ability that guarantees certain service quality (QoS) at present, promptly, the base station is after obtaining the solicitation message of user terminal, to judge user terminal message transmitted classification according to the code word that the family terminal is used, when Radio Resource is not enough, the base station can be returned refusal to the low user of priority and send message, makes it not take too much Radio Resource.
Yet, the shortcoming that exists is at present: different information classification priority are different, but for sending solicitation message, be equal to from all user terminal RACH of base station services, no matter therefore how nervous Radio Resource is in the network, lower priority class information still can be competed the transmission solicitation message, and the base station can only comprise the transmission that the notification message of refusing to send suppresses this category information by transmission, the waste Radio Resource.
In addition, code source is limited, because different information category uses different codeword set, makes the element of each codeword set further reduce.The user who sends same information category information is many more, and the possibility that bumps is big more.
More than two shortcomings all make the capacity of network reduce the access efficiency variation.
Yet, propose at present to solve the scheme of network capacity deficiency, problem that access efficiency is low as yet.
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 to provide a kind of access mechanism at random, to solve network capacity deficiency and the low shortcoming of access efficiency in the correlation technique.
According to one embodiment of present invention, provide a kind of accidental access method.
This method may further comprise the steps: step S102 is divided into a plurality of subclass access channels by class of service with access channel; Step S104 is respectively each subclass access channel and distributes the medium resource; And step S106, to be accessed professional when attempting inserting, judge whether to exist and the corresponding subclass access channel of the classification of business to be accessed according to the classification of business to be accessed, and operate accordingly according to judged result.
Wherein, in step S106, when judged result when existing with the corresponding subclass access channel of the classification of business to be accessed, also comprise following processing: judge whether the corresponding subclass access channel of classification with business to be accessed exists current available medium resource; When there was current available medium resource in judgement, business to be accessed attempted inserting on the subclass access channel of correspondence.
And, business to be accessed inserts in trial on the subclass access channel of correspondence and also comprises following processing: user terminal is that described business to be accessed is selected to insert the medium Resource Block in the current available medium resource of the subclass access channel of correspondence randomly, and sends access message on selected medium Resource Block.Wherein, described access message comprises the feature or the parameter relevant with user terminal characteristics of selected medium Resource Block.The feature of selected medium Resource Block can be represented by frequency spectrum, time slot, code word and the combination in any thereof of selected medium Resource Block.
Wherein, the corresponding relation of subclass access channel and class of service can be that base station and user terminal are predetermined in advance and know, or determines the back informing user terminal by the base station.And the base station is according to the situation of current class of service, the quantity of adaptively modifying subclass access channel, the perhaps quantity of the corresponding relation of adaptively modifying subclass access channel and class of service and subclass access channel.
In addition, different subclass access channels has can be distinguished or the medium resource of quadrature, and the quantity of the medium resource between the different subclass access channels is identical or different.And the quantity of medium resource comprises 0, and the quantity of medium resource is 0 o'clock, represents that there is not current available medium resource in this subclass access channel.The medium resource comprises frequency resource, time interval resource, sign indicating number resource and combination in any thereof.
In addition, in the method, the base station is according to current situation, for each subclass access channel distributes the medium resource.Wherein, the base station can be according to the situation that takies of the medium resource of each subclass access channel or the intensity distributions of current each class of service, the allocation proportion between the medium resource of the subclass channel that adaptively modifying is different.
According to one embodiment of present invention, provide a kind of accidental access device.
This device comprises: division unit is used for by class of service access channel being divided into a plurality of subclass access channels; Allocation units are respectively each subclass access channel and distribute the medium resource; And operating unit, be used for to be accessed professional when attempting inserting, judge whether to exist and the corresponding subclass access channel of the classification of business to be accessed according to the classification of business to be accessed, and operate accordingly according to judged result.
Wherein, operating unit comprises: judging unit, be used for when judged result when existing with the corresponding subclass access channel of the classification of business to be accessed, judge whether the corresponding subclass access channel of classification with business to be accessed exists current available medium resource; And access unit, be used for when judging that when having current available medium resource, business to be accessed is attempted access on the subclass access channel of correspondence.
By technique scheme of the present invention, can solve the collision probability that reduces the application information that user terminal sent, reduced the taking of network capacity, and improved access efficiency.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the accidental access method of the inventive method embodiment;
Fig. 2 is the concise and to the point process chart according to the accidental access method of the inventive method embodiment;
Fig. 3 is the process chart according to the application example of the accidental access method of the inventive method embodiment; And
Fig. 4 is the block diagram according to the accidental access device of present device embodiment.
Embodiment
Describe embodiments of the invention below with reference to accompanying drawings in detail.
Method embodiment
In the present embodiment, provide a kind of accidental access method.
As shown in Figure 1, the accidental access method according to present embodiment may further comprise the steps: step S102 is divided into a plurality of subclass access channels by class of service with access channel; Step S104 is respectively each subclass access channel and distributes the medium resource; And step S106, to be accessed professional when attempting inserting, judge whether to exist and the corresponding subclass access channel of the classification of business to be accessed according to the classification of business to be accessed, and operate accordingly according to judged result.
Wherein, in step S106, when judged result when existing with the corresponding subclass access channel of the classification of business to be accessed, also comprise following processing: judge whether the corresponding subclass access channel of classification with business to be accessed exists current available medium resource; When there was current available medium resource in judgement, business to be accessed attempted inserting on the subclass access channel of correspondence.
And, business to be accessed inserts in trial on the subclass access channel of correspondence and also comprises following processing: user terminal is that described business to be accessed is selected to insert the medium Resource Block in the current available medium resource of the subclass access channel of correspondence randomly, and sends access message on selected medium Resource Block.
Wherein, the corresponding relation of subclass access channel and class of service can be that base station and user terminal are predetermined in advance and know, or determines the back informing user terminal by the base station.And the base station is according to the situation of current class of service, the quantity of adaptively modifying subclass access channel, the perhaps quantity of the corresponding relation of adaptively modifying subclass access channel and class of service and subclass access channel.
In addition, different subclass access channels has can be distinguished or the medium resource of quadrature, and the quantity of the medium resource between the different subclass access channels is identical or different.And the quantity of medium resource comprises 0, and the quantity of medium resource is 0, represents that there is not current available medium resource in this subclass access channel.The medium resource comprises frequency resource, time interval resource, sign indicating number resource and combination in any thereof.
In addition, in the method, the base station is according to current situation, for each subclass access channel distributes the medium resource.Wherein, the base station can be according to the situation that takies of the medium resource of each subclass access channel or the intensity distributions of current each class of service, the allocation proportion between the medium resource of the subclass channel that adaptively modifying is different.
Based on top description, this method can be summarised as processing shown in Figure 2.As shown in Figure 2, it specifically may further comprise the steps:
Step S201 is divided into plurality of sub classification access channel (corresponding to above-mentioned step S102) by class of service with access channel, and the corresponding relation of subclass access channel and class of service is known or determines back notice website by the base station;
Step S202, for the subclass access channel distributes medium resource (corresponding to above-mentioned step S104), as mentioned above, medium resource between the different subclass access channels is a quadrature, medium resource quantity between the access channel of different subclass can different and not be that certain subclass access channel distribution medium resource also is a kind of method of salary distribution of medium resource, each subclass access channel can comprise some access subchannels, and access subchannels different in the identical subclass access channel are differentiable or quadrature; And
Step S203, class of service to be accessed attempts inserting (corresponding to above-mentioned steps S106) on corresponding effective subclass access channel, if classification with respect to business to be accessed, there is current available medium resource in the access channel of corresponding subclass, and business then to be accessed attempts inserting at this subclass access channel.
Describe in detail according to the method for the present embodiment detailed process flow process when the specific implementation with reference to Fig. 3 below.
As shown in Figure 3, this method specifically can may further comprise the steps:
Step S301, UE (user terminal) keep or refresh Random Access Channel (RACH) information, and preferably, UE can obtain the RACH information of base station (BS) broadcasting from the downlink broadcast channel; If certain UE does not have RACH information, then this UE will monitor and obtain RACH information from BS, if UE has had RACH information and obtain new RACH information at current time then use the original RACH information of new RACH information substitution, otherwise keep old RACH information, according to the RACH information that is obtained, UE can know there is which subclass access channel in the present network, and which the class various-service corresponding with these subclass access channels can apply for inserting, and current which subclass access channel has effective medium resource carries out this for corresponding business and take turns and attempt inserting;
Alternatively, RACH information is the BS broadcast message, this broadcasting can be periodic, RACH information comprises the division of subclass RACH, the time-frequency resource allocating of each subclass RACH, the signed codevector set that each subclass RACH can use, and parameter such as leading scrambler, the medium resource of each subclass RACH refers to the combination of this each subclass RACH running time-frequency resource and signed codevector, if each subclass RACH can with signed codevector set be that base station and user terminal are predetermined in advance and know, then this signed codevector aggregate information can be not included in the periodic broadcast information, in addition, preferably, can in above-mentioned steps S102, RACH be divided into the RACH of P subclass by class of service, classifying and numbering S1 to SP, S1 corresponding service classification priority is the highest, and priority level is successively decreased successively, and the SP priority level is minimum, this corresponding relation can be that UE knows, RACH information comprises current effective subclass RACH information, is I as current effective access channel classification number, and I is not more than P, I effective classification is respectively Si1, Si2 ..., SiI, subscript i1 to iI is not more than P respectively, and not necessarily continuous;
Step S302, UE judges whether to exist and professional corresponding subclass access channel to be accessed, particularly, if UE existence and the corresponding business to be accessed of subclass access channel are (for example, the business to be accessed of UE is respectively SEV1, SEV3 and SEV5), if the indication existence of RACH information and SEV1 and corresponding Si1 of SEV3 and Si3 subclass access channel, then Si1 and Si3 subclass access channel can insert for SEV1 and SEV3, execution in step S303 then, otherwise execution in step S301;
Step S303, UE judges whether to exist effective subclass access channel, specifically, if and there is effective medium resource in the corresponding subclass access channel of UE business to be accessed, then this subclass RACH is called as effective subclass RACH, corresponding business to be accessed can attempt inserting at this effective subclass RACH, if exist and UE professional SEV1 to be accessed and corresponding Si1 of SEV3 and Si3 subclass access channel, wherein Si1 has the medium resource, and there are not medium resource or inadequate resource among the Si3, then UE professional SEV1 to be accessed can attempt inserting, execution in step S304 then, otherwise execution in step S301;
Step S304, UE selects to insert time randomly for the business that can attempt inserting on corresponding effective subclass RACH, particularly, the business that can attempt inserting among the UE has a plurality of, these business can be same line of business, it also can be the inhomogeneity business, for belonging to the different effectively trial access service of subclass RACH, UE can select time for it respectively randomly on corresponding subclass RACH, for the one or more trial access service that belong to identical effective subclass RACH, UE can only select time for one of them business randomly, or is that a plurality of business are selected time randomly according to the medium resource size of this effective subclass RACH;
Step S305, UE selects signed codevector and structure lead code randomly, and in selected medium Resource Block transmission, access information can be this lead code, also can represent by this lead code and the combination of the time slot that sends this lead code, that is to say, UE selects signed codevector and structure lead code randomly from the signed codevector set that corresponding effective subclass RACH can use, and be that the business that has obtained time in step S304 sends this lead code on the time that it obtained, the combination of signed codevector or signed codevector and the residing time slot of medium Resource Block is constituted access information as the feature of medium Resource Block, epicycle is attempted inserting and is finished after all attempt access service to send lead code, handles and gets back to step S301.
Device embodiment
In the present embodiment, provide a kind of accidental access device.
As shown in Figure 4, the accidental access device 400 according to present embodiment comprises: division unit 402 is used for by class of service access channel being divided into a plurality of subclass access channels; Allocation units 404 are respectively each subclass access channel and distribute the medium resource; And operating unit 406, be used for to be accessed professional when attempting inserting, judge whether to exist and the corresponding subclass access channel of the classification of business to be accessed according to the classification of business to be accessed, and operate accordingly according to judged result.
Wherein, operating unit 406 comprises: judging unit 4062, be used for when judged result when existing with the corresponding subclass access channel of the classification of business to be accessed, judge whether the corresponding subclass access channel of classification with business to be accessed exists current available medium resource; And access unit 4064, be used for when judging that when having current available medium resource, business to be accessed is attempted access on the subclass access channel of correspondence.
In sum, the present invention is divided into some classification access channels according to class of service with access channel, again each subclass access channel is divided into a plurality of access subchannels, the base station is the access channel distribution medium resource of corresponding subclass according to the intensity of all kinds of business in the network, if the medium resource that specific subclass access channel is got is more, then will obtain more access chance with this subclass access channel corresponding business, if a specific subclass access channel is not got the medium resource, then can not insert with such access channel corresponding business.Therefore, by means of technical scheme of the present invention, when Internet resources are nervous, can be by the adjustment of each subclass access channel medium resource being controlled the access probability of different classes of business, thereby solve the collision probability that reduces the application information that user terminal sent, reduced to network capacity unnecessary take waste with resource, and improved access efficiency.
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 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 (14)
1. an accidental access method is characterized in that, may further comprise the steps:
Step S102 is divided into a plurality of subclass access channels by class of service with access channel;
Step S104 is respectively each described subclass access channel and distributes the medium resource; And
Step S106 to be accessed professional when attempting inserting, judge whether to exist and the corresponding subclass access channel of the classification of described business to be accessed according to the classification of described business to be accessed, and operates accordingly according to judged result.
2. accidental access method according to claim 1 is characterized in that, in described step S106, when described judged result when existing with the corresponding subclass access channel of the classification of described business to be accessed, also comprise following processing:
Whether judgement exists current available medium resource with the corresponding described subclass access channel of classification of described business to be accessed; And
When there was described current available medium resource in judgement, described business to be accessed attempted inserting on the subclass access channel of described correspondence.
3. accidental access method according to claim 2 is characterized in that, described business to be accessed is attempted inserting on the subclass access channel of described correspondence and also comprised following processing:
User terminal is that described business to be accessed is selected to insert the medium Resource Block in the current available medium resource of the described subclass access channel of correspondence randomly, and sends access message on selected medium Resource Block.
4. accidental access method according to claim 3 is characterized in that, described access message comprises the feature of selected medium Resource Block or the parameter relevant with the feature of described user terminal.
5. accidental access method according to claim 4 is characterized in that, the feature of selected medium Resource Block is represented by frequency spectrum, time slot, code word and the combination in any thereof of selected medium Resource Block.
6. according to each described accidental access method in the claim 1 to 5, it is characterized in that, the corresponding relation of described subclass access channel and described class of service is that base station and user terminal are predetermined in advance and know, or notifies described user terminal after being determined by described base station.
7. accidental access method according to claim 4, it is characterized in that, described base station is according to the situation of current class of service, the quantity of the described subclass access channel of adaptively modifying, the perhaps quantity of the corresponding relation of described subclass access channel of adaptively modifying and described class of service and described subclass access channel.
8. according to each described accidental access method in the claim 1 to 5, it is characterized in that, different described subclass access channels has can be distinguished or the medium resource of quadrature, and the quantity of the medium resource between the different described subclass access channels is identical or different.
9. accidental access method according to claim 8 is characterized in that the quantity of described medium resource comprises 0, represents that there is not current available medium resource in described subclass access channel.
10. accidental access method according to claim 8 is characterized in that, described medium resource comprises: frequency resource, time interval resource, sign indicating number resource and combination in any thereof.
11., it is characterized in that described base station is according to current situation, for each described subclass access channel distributes the medium resource according to each described accidental access method in the claim 1 to 3.
12. accidental access method according to claim 11, it is characterized in that, described base station is according to the situation that takies of the medium resource of each described subclass access channel or the intensity distributions of current each class of service, the allocation proportion between the medium resource of the described subclass channel that adaptively modifying is different.
13. an accidental access device is characterized in that, comprising:
Division unit is used for by class of service access channel being divided into a plurality of subclass access channels;
Allocation units are respectively each described subclass access channel and distribute the medium resource; And
Operating unit is used for to be accessed professional when attempting inserting, and judges whether to exist and the corresponding subclass access channel of the classification of described business to be accessed according to the classification of described business to be accessed, and operates accordingly according to judged result.
14. accidental access device according to claim 13 is characterized in that, described operating unit comprises:
Judging unit, be used for when described judged result when existing with the corresponding subclass access channel of the classification of described business to be accessed, judge whether the corresponding described subclass access channel of classification with described business to be accessed exists current available medium resource; And
Access unit is used for when judging that when having described current available medium resource, described business to be accessed is attempted access on the subclass access channel of described correspondence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710088819A CN101277517B (en) | 2007-03-28 | 2007-03-28 | Random access method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710088819A CN101277517B (en) | 2007-03-28 | 2007-03-28 | Random access method and device |
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| CN101277517A true CN101277517A (en) | 2008-10-01 |
| CN101277517B CN101277517B (en) | 2012-09-05 |
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| CN200710088819A Expired - Fee Related CN101277517B (en) | 2007-03-28 | 2007-03-28 | Random access method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107734696A (en) * | 2017-11-06 | 2018-02-23 | 湖南大学 | Communication and energy scheduling exchange method and device |
| WO2018113664A1 (en) * | 2016-12-22 | 2018-06-28 | 夏普株式会社 | User equipment and related method |
| WO2019033876A1 (en) * | 2017-08-02 | 2019-02-21 | Qualcomm Incorporated | Configurations for transmitting random access preamble messages |
| CN114390721A (en) * | 2021-12-30 | 2022-04-22 | 四川大学 | Base station and random access method based on service priority |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1843622B1 (en) * | 2000-04-04 | 2009-12-30 | Sony Deutschland Gmbh | Event triggered change of access service class in a random access channel |
| US7512109B2 (en) * | 2000-09-29 | 2009-03-31 | Intel Corporation | Slot structure for radio communications system |
| US7590099B2 (en) * | 2003-09-25 | 2009-09-15 | Qualcomm Incorporated | Managing traffic in communications system having dissimilar CDMA channels |
-
2007
- 2007-03-28 CN CN200710088819A patent/CN101277517B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113664A1 (en) * | 2016-12-22 | 2018-06-28 | 夏普株式会社 | User equipment and related method |
| WO2019033876A1 (en) * | 2017-08-02 | 2019-02-21 | Qualcomm Incorporated | Configurations for transmitting random access preamble messages |
| CN107734696A (en) * | 2017-11-06 | 2018-02-23 | 湖南大学 | Communication and energy scheduling exchange method and device |
| CN107734696B (en) * | 2017-11-06 | 2019-10-29 | 湖南大学 | Communication and energy scheduling exchange method and device |
| CN114390721A (en) * | 2021-12-30 | 2022-04-22 | 四川大学 | Base station and random access method based on service priority |
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| CN101277517B (en) | 2012-09-05 |
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