CN101527966B - Random access channel distributing method - Google Patents
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- CN101527966B CN101527966B CN 200810007428 CN200810007428A CN101527966B CN 101527966 B CN101527966 B CN 101527966B CN 200810007428 CN200810007428 CN 200810007428 CN 200810007428 A CN200810007428 A CN 200810007428A CN 101527966 B CN101527966 B CN 101527966B
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Abstract
The invention discloses a random access channel distributing method, which comprises the following steps that: under the condition that a terminal adopting a multi-antenna mode to transmit access information to be transmitted and a terminal adopting a single-antenna mode to transmit the access information to be transmitted exist simultaneously in a service area covered by an access device, random access channels are divided into random access channels with a single-antenna transmission mode and random access channels with a multi-antenna transmission mode; and the access device distributes media resources for the random access channels with the single-antenna transmission mode and the random access channels with the multi-antenna transmission mode respectively. The method can improve the quality of signals from access channels of cell edge users with multi-antenna capacity to the access device side so as to improve the access efficiency.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of random access channel distributing method.
Background technology
RACH is generally used for user terminal to carry out service request, position and moves the transmission of back to signalings such as network lastest imformations when start-up logging.
At present, realize that the core concept that inserts at random is: when remaining between the receiving-transmitting sides to deliver a letter the breath transmission, transmit leg takies Radio Resource randomly and sends information to be passed to the recipient.Wherein, Radio Resource can be frequency resource, time interval resource and code source etc.Its concrete implementation method is: all information to transmitting in the RACH are classified; Different information classifications has the different code word set; RACH has certain Radio Resource, and this resource is further divided, and obtains random access sub-channel.
Here; Transmit leg is user terminal normally, and the recipient is the base station normally, and 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 random access sub-channel randomly, sends this application message.
After the base station receives this application message from random access sub-channel; 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; Return to user terminal, this acknowledge message can be the message that expression allows to send or refuse transmission, and 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 random access procedure.
At present, the advantage of RACH is to possess the ability that guarantees certain service quality (QoS).Promptly; User terminal message transmitted classification will be judged according to the code word that user terminal uses in the base station after obtaining the solicitation message of user terminal, 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.
The continuous progress of wireless communication technology causes the market demand also can change, and this can absorb these new technology through the process of continuous evolution with regard to requiring standard, satisfies new demand simultaneously.Through the process of this evolution, standard and the system that realizes according to this standard not only can be through its vitality of smooth upgrade continuity, and the existing investment of protection user is more manyed better service but also can provide than old system.IS95 is to the evolution of CDMA1X; The evolution of the long evolving system of 3GPP (LTE); Micro-wave access to global intercommunication (WorldwideInteroperability for Microwave Access, be called for short WiMAX) all is the example of standard evolution from 16d to 16e and to evolution of 16m or the like.
Under original system, user terminal utilizes single antenna to send information to be passed at RACH.Consider that evolution system on the original system basis need support the sub-district bigger than original system to cover; Thereby for Cell Edge User with many antenna capabilities; If adopt single antenna to send information to be passed; Its access signal quality that arrives base station side is relatively poor, and this can influence this user's access efficiency, even can't insert.
In addition, when having the base station of two communication systems in an area, if evolution system needs compatible original system, then the accidental access method of evolution system must consider that the terminal of original system can normally insert at random.
Summary of the invention
One or more problems in view of the above the invention provides a kind of random access channel distributing method, and the access channel of Cell Edge User that has many antenna capabilities with raising is to the signal quality of access device side, thereby improve access efficiency.
Random access channel distributing method according to the embodiment of the invention; May further comprise the steps: access device exists many antennas of employing mode to send under the situation at the terminal of access information to be passed and the terminal that employing single antenna mode is sent access information to be passed in the coverage of its covering simultaneously, and RACH is divided into the RACH of single antenna send mode and the RACH of many antenna transmission mode; And access device is respectively the RACH of single antenna send mode and the RACH allocation medium resource of many antenna transmission mode.
Wherein, access device is that media resource that the RACH of RACH and/or many antenna transmission mode of single antenna send mode distributes comprises one or more in the following resource: frequency resource, time interval resource, code source.
Wherein, access device is that the relation between the media resource that distributes of the RACH of single antenna send mode and the media resource that distributes for the RACH of many antenna transmission mode is that time division multiplexing, frequency division multiplexing or time-division frequency division combine.
Random access channel distributing method according to the embodiment of the invention also comprises: the situation that takies of the media resource that access device distributes according to the RACH of the RACH and the many antenna transmission mode that are respectively the single antenna send mode, current service distribution situation and/or current offered load distribution situation, the media resource for the RACH distribution of the RACH of single antenna send mode and many antenna transmission mode is dynamically adjusted.
Random access channel distributing method according to the embodiment of the invention also comprises: the relevant information of the relevant information of the media resource that access device will distribute for the RACH of single antenna send mode and the media resource that distributes for the RACH of many antenna transmission mode is sent to all terminals in the coverage that access device covers.Particularly; Access device is through broadcast, and the relevant information of the relevant information of the media resource that will distribute for the RACH of single antenna send mode and the media resource that distributes for the RACH of many antenna transmission mode is sent to all terminals in the coverage that access device covers.
Random access channel distributing method according to the embodiment of the invention also comprises: adopt many antennas mode to send the terminal of access information to be passed and/or the terminal of adopting the single antenna mode to send access information to be passed is sent access information to be passed through the RACH of many antenna transmission mode and/or the RACH of single antenna mode to access device.
Wherein, diversity technique or multi-aerial space multiplexing technology between multi-antenna space are adopted in the terminal of adopting many antennas mode to send access information to be passed, and the RACH through many antennas mode sends access information to be passed to access device.Preferably, the multi-antenna technology of two transmitting antennas is adopted at the terminal of adopting many antennas mode to send access information to be passed, and the RACH through many antennas mode sends access information to be passed to access device.
Random access channel distributing method provided by the invention can compatible original legacy version the terminal access evolution system, can improve user and insert the signal quality of signal, thereby can improve access efficiency to the access device side with many antenna capabilities.Especially, to having the Cell Edge User of many antenna capabilities, the self adaptation adjustment through to two types of access channels can improve access efficiency, reduces the waste of resource.
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 random access channel distributing method of the embodiment of the invention;
Fig. 2 is the flow chart that has utilized the accidental access method of method shown in Figure 1.
Embodiment
With reference to accompanying drawing, specify embodiment of the present invention below.
Fig. 1 is the flow chart according to the random access channel distributing method of the embodiment of the invention.As shown in Figure 1; This random access channel distributing method may further comprise the steps: S102; Access device exists many antennas of employing mode to send under the situation at the terminal of access information to be passed and the terminal that employing single antenna mode is sent access information to be passed in the coverage of its covering simultaneously, and RACH is divided into the RACH of single antenna send mode and the RACH of many antenna transmission mode; And S104, access device is respectively the RACH of single antenna send mode and the RACH allocation medium resource of many antenna transmission mode.
Wherein, the terminal can obtain the assignment information of access channel, and from the access channel of respective classes, attempts inserting.Wherein, the mode that the terminal obtains the assignment information of access channel can be provided with according to a preconcerted arrangement in advance, also can be from the broadcast of base station, to obtain.Wherein, the space diversity reception to communicate of many antennas can be adopted in the terminal, also can adopt space multiplexing technique.Consider implementation complexity, preferable many antennas mode is to adopt the multi-antenna technology of two transmitting antennas.
Wherein, whether be criterion to access device if adopting many antennas mode to send access information to be passed to the division of RACH with the terminal.Wherein, access device is that the media resource that above-mentioned two types of RACHs distribute can be one or combination in any in frequency resource, time interval resource and the code source.And; The media resource of RACH that access device is distributed to RACH or many antenna transmission mode of single antenna send mode can be zero; When the media resource size is zero, represent that there is not current available media resource in such RACH.Wherein, these two types of RACHs of the RACH of the RACH of single antenna send mode and many antenna transmission mode can be that time-division, frequency division and time-division frequency division combine.
Wherein, Access device can also be to being that the size of the media resource that distributes of two types of RACHs is carried out the self adaptation adjustment; Comprise the one or more combinations in the following mode: 1) when a certain type of access channel is in congestion state, distribute more media resource for this classification access channel; 2) when a certain type of access channel is in the comparison idle condition, reduce the media resource of such access channel.
Fig. 2 is the flow chart that has utilized the accidental access method of method shown in Figure 1.As shown in Figure 1, this accidental access method may further comprise the steps:
S202, access device is divided into two types with access channel: the access channel of the access channel of single antenna send mode and many antenna transmission mode.Wherein, access device can be base station (BS), also can be access point (AP).Wherein, the division of RACH is whether adopt many antennas mode to send to insert information to be passed with the terminal be criterion.At the access channel of single antenna send mode, the terminal adopts the single antenna mode to send access information to be passed; At the access channel of many antenna transmission mode, the terminal is adopted many antennas mode to send and is inserted information to be passed.Preferably, consider the complexity of realization, preferable many antennas mode is to adopt the multi-antenna technology of two transmitting antennas.
S204, access device give two types of access channel allocation medium resources respectively.Wherein, media resource can be or a combination in any in frequency resource, time interval resource and the code source.In the present embodiment, giving single antenna send mode access channel or the many antenna transmission mode access channel media resource that these two types of access channels distribute is frequency resource, time interval resource and code source.
Wherein, the media resource of access channel of distributing to access channel or many antenna transmission mode of single antenna send mode can be zero, when the media resource size is zero, representes that there is not current available media resource in such access channel.Preferably, the terminal of the system of haveing been friends in the past for compatibility is former, the media resource of the access channel of schedule of apportionment antenna transmission mode can not be zero, and the media resource of distributing to the access channel of many antenna transmission mode can be zero.Wherein, If it is all non-vanishing to distribute to the media resource of single antenna send mode access channel or many antenna transmission mode access channel, can be that time-division, frequency division and time-division frequency division combine between these two types of access channels of the access channel of the access channel of single antenna send mode and many antenna transmission mode then.
For example, in the access channel design process for the IEEE802.16m of WiMAX, can access channel be divided into single antenna send mode access channel or many antenna transmission mode access channel, these two types of access channels can be the time-divisions, promptly take different time slots.Simultaneously, these two types of access channels also can be frequency divisions, promptly take different subcarriers; It also can be the mode that the time-division frequency division combines.
Especially; The base station can be according to the situation that takies of access channel media resource or current business distribution or distribution of current network distributed load or three's combination in any information etc.; Set corresponding strategy; Adaptively the size of the media resource of two types of access channels is adjusted:, distribute more media resource then for this classification access channel when a certain type of access channel is in congestion state; When a certain type of access channel is in the comparison idle condition, then reduce the media resource of such access channel.After carrying out above-mentioned adjustment, the base station will be with the information informing user terminal after upgrading, as broadcasts adjusted access channel information, and user terminal upgrades after receiving synchronously.Described strategy can be according to inserting more terminal as far as possible, and principles such as raising access efficiency are formulated.
S206, the terminal obtains the assignment information of access channel, and from the access channel of respective classes, attempts inserting.
The mode of obtaining is as implied above, can be to be provided with in advance according to a preconcerted arrangement, and also can be from the notification message of base station, to obtain.The base station can be designated as the media resource that each access channel distributes in broadcast, the terminal can attempt inserting in the access channel of respective classes.
Through the present invention, keep the terminal access evolution system that the access channel of single antenna send mode can compatible original legacy version; Introduce the access channel design of many antenna transmission mode, can improve user and insert the signal quality of signal, thereby improve access efficiency, especially to having the Cell Edge User of many antenna capabilities to base station side with many antenna capabilities; Self adaptation adjustment through to two types of access channels can improve access efficiency, reduces the waste of resource.
The above is merely embodiments of the invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (11)
1. a random access channel distributing method is characterized in that, may further comprise the steps:
Access device exists many antennas of employing mode to send under the situation at the terminal of access information to be passed and the terminal that employing single antenna mode is sent access information to be passed in the coverage of its covering simultaneously, and RACH is divided into the RACH of single antenna send mode and the RACH of many antenna transmission mode; And
Said access device is respectively the RACH of said single antenna send mode and the RACH allocation medium resource of said many antenna transmission mode.
2. distribution method according to claim 1; It is characterized in that said access device is that media resource that the RACH of RACH and/or said many antenna transmission mode of said single antenna send mode distributes comprises one or more in the following resource: frequency resource, time interval resource, code source.
3. distribution method according to claim 2; It is characterized in that said access device is that the relation between the media resource that distributes of the RACH of said single antenna send mode and the media resource that distributes for the RACH of said many antenna transmission mode is that time division multiplexing, frequency division multiplexing or time-division frequency division combine.
4. distribution method according to claim 1 is characterized in that, also comprises:
The situation that takies of the media resource that said access device distributes according to the RACH of the RACH that is respectively said single antenna send mode and said many antenna transmission mode, current service distribution situation and/or current offered load distribution situation are dynamically adjusted the media resource for the RACH distribution of the RACH of said single antenna send mode and said many antenna transmission mode.
5. according to each described distribution method in the claim 1 to 4, it is characterized in that, also comprise:
The relevant information of the relevant information of the media resource that said access device will distribute for the RACH of said single antenna send mode and the media resource that distributes for the RACH of said many antenna transmission mode is sent to all terminals in the coverage that said access device covers.
6. distribution method according to claim 5; It is characterized in that; Said access device is through broadcast, and the relevant information of the relevant information of the media resource that will distribute for the RACH of said single antenna send mode and the media resource that distributes for the RACH of said many antenna transmission mode is sent to all terminals in the coverage that said access device covers.
7. distribution method according to claim 6 is characterized in that, also comprises:
Said many antennas of employing mode is sent the terminal of access information to be passed and is sent said access information to be passed through the RACH of said many antenna transmission mode and the RACH of said single antenna mode to said access device respectively with the terminal of adopting the single antenna mode to send access information to be passed.
8. distribution method according to claim 7; It is characterized in that; Said many antennas of employing mode is sent the terminal of access information to be passed and is adopted diversity technique or multi-aerial space multiplexing technology between multi-antenna space, and the RACH through said many antennas mode sends said access information to be passed to said access device.
9. distribution method according to claim 8; It is characterized in that; The multi-antenna technology of two transmitting antennas is adopted at the terminal that said many antennas of employing mode is sent access information to be passed, and the RACH through said many antennas mode sends said access information to be passed to said access device.
10. distribution method according to claim 6 is characterized in that, also comprises:
The terminal that said many antennas of employing mode is sent access information to be passed is sent said access information to be passed through the RACH of said many antenna transmission mode to said access device.
11. distribution method according to claim 6 is characterized in that, also comprises:
The terminal that said employing single antenna mode is sent access information to be passed is sent said access information to be passed through the RACH of said single antenna mode to said access device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810007428 CN101527966B (en) | 2008-03-07 | 2008-03-07 | Random access channel distributing method |
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| CN 200810007428 CN101527966B (en) | 2008-03-07 | 2008-03-07 | Random access channel distributing method |
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| CN101527966A CN101527966A (en) | 2009-09-09 |
| CN101527966B true CN101527966B (en) | 2012-12-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102457968B (en) * | 2010-11-02 | 2015-10-28 | 中兴通讯股份有限公司 | The method and system that a kind of back haul link physical uplink control channel resource distributes |
| CN107734559B (en) | 2016-08-10 | 2023-05-23 | 中兴通讯股份有限公司 | Wireless access method, device and system |
| CN110247743B (en) * | 2018-03-08 | 2021-11-19 | 中国移动通信有限公司研究院 | Random access method, device, equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269953A (en) * | 1997-07-04 | 2000-10-11 | 艾利森电话股份有限公司 | Method and arrangement relating to radio communication systems |
| CN101115295A (en) * | 2006-07-28 | 2008-01-30 | 西门子公司 | Method system and equipment for enhancing random access channel transmission rate |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269953A (en) * | 1997-07-04 | 2000-10-11 | 艾利森电话股份有限公司 | Method and arrangement relating to radio communication systems |
| CN101115295A (en) * | 2006-07-28 | 2008-01-30 | 西门子公司 | Method system and equipment for enhancing random access channel transmission rate |
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Effective date of registration: 20170905 Address after: 253615, No. 227, Cross Village, Garden Town, Dezhou City, Shandong, Leling Patentee after: Guo Yuyong Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong high tech Industrial Park, ZTE building Patentee before: ZTE Corporation |
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Inventor after: Guo Yuyong Inventor before: Yu Qiuxing Inventor before: Tan Huanxi Inventor before: Wang Wenhuan Inventor before: Liu Min Inventor before: Liu Qiaoyan Inventor before: Zhao Lu |
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