CN101389128B - Method for network access of customer terminal through radio relay - Google Patents
Method for network access of customer terminal through radio relay Download PDFInfo
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- CN101389128B CN101389128B CN2007101498635A CN200710149863A CN101389128B CN 101389128 B CN101389128 B CN 101389128B CN 2007101498635 A CN2007101498635 A CN 2007101498635A CN 200710149863 A CN200710149863 A CN 200710149863A CN 101389128 B CN101389128 B CN 101389128B
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Abstract
The invention discloses a method for a user terminal to access network by a radio relay, comprising steps that: at first, the base station determines whether there is enough resource for supporting access of the user terminal according to the cell resource using situation and the bandwidth request information forwarded by a relay station and sent by a user terminal, if so, the base station feeds back an access permission response information to the relay station, and distributes corresponding channel resources to an access link and a relay link; the access permission response information received relay station forwards the response information to the user terminal, and the user terminal receives the response information from the response information from the relay station, determines the final object relay station and the object base station, sends a relay starting command to the object relay station, and gets access to the network. Applying the method, network access by user terminals in cross-covered region at edge of multiple cells is implemented by the relay of the radio relay station.
Description
Technical field
The present invention relates to the honeycomb relay communications system, relate in particular to the method for a kind of user terminal through the wireless relay access network.
Background technology
Along with the commercialization of 3G system begins; Have higher rate, more the B3G/4G technology of spectral efficient, higher covering and stronger service supporting capacity has got into normalization period; ITU plans to accomplish the B3G frequency spectrum in 2007 and plans; Accomplished main standard in 2010, beginning in 2012 is commercial, and large scale investment is commercial after 2015.B3G/4G requires transmission rate can reach 1Gbps, and the frequency spectrum that needs is 100MHz at least.For the spectrum requirement in such broadband, be difficult in the existing frequency range and find, therefore need distribute higher frequency range, such as 5GHz or 6GHz to B3G/4G.
Though improve the frequency-assignment problem that working frequency range can solve B3G/4G, also can bring the problems in the realization thereupon.On the one hand, operation frequency range is high more, and electromagnetic decline is more severe, that is to say that base station transmitting power can exist than high attenuation.The quick decline of base station transmitting power can cause the coverage of base station to diminish, and under the constant situation of base station range, the quick decline of power can cause the power control at edge, sub-district not ideal enough; If keep the coverage of base station constant, then need further to strengthen the transmitting power of base station, can increase irradiation of electromagnetic waves like this, and people hope that electromagnetic wave is more little good more to the radiation of human body.Moreover operation frequency range is high more, electromagnetic diffracting power is poor more, penetration capacity also more a little less than, in this case, electromagnetic wave is more and more near straightline propagation.If exist building to block, will cause " shade " area that exists a lot of electromagnetic waves to arrive in the sub-district.Such as a user terminal (UT) at the back at a building; Can't walk around building owing to electromagnetic diffracting power difference and reach this user terminal place; In addition; Arrive this user terminal owing to making electromagnetic wave signal can't pass building a little less than the electromagnetic penetration capacity, finally cause this user terminal to receive from signal of base station.
Introduce the wireless relay technology and can solve, thereby receive extensive concern such as normal structures such as IEEE802.16j owing to building blocks and the covering problem of any signal all inaccessible " dead band " phenomenon that the influence that declines causes.In these dead bands, user terminal is merely able to the relaying through relay station, can access network and the service that provides of enjoy network.But, outside cell edge or sub-district, which sub-district some user terminals in the scope that particularly a plurality of relay stations cover insert through which kind of path, are the problems that needs solve.
In sum, a kind of Cell Edge User of current needs terminal is through the technical scheme of wireless relay access network.
Summary of the invention
Technical problem to be solved by this invention provides the method for a kind of user terminal through the wireless relay access network, through the relaying of radio repeater station, realizes the network insertion of user terminal in the common overlay area of a plurality of cell edges.
In order to address the above problem, the invention provides the method for a kind of user terminal through the wireless relay access network, comprise base station, relay station and user terminal, may further comprise the steps,
The bandwidth request information that the user terminal that transmit according to its local resource operating position and relay station a, said base station sends; Whether judge has enough resources to support the access of said user terminal in this base station cell; If; The then said base station response message that a permission inserts to the relay station feedback, and be that access link and repeated link distribute the respective channel resource;
B, receive that the relay station of the response message that allow to insert is transmitted to said user terminal with this response message; User terminal receives the said response message from relay station; And definite final objective relay station and target BS, send relaying starting command, access network to target relay.
Further, said method also can comprise, comprise among the said step a,
A1: said user terminal sends bandwidth request information to neighboring relay stations, and starts timer, and the time cycle is T;
A2: after relay station was received the bandwidth request information of said user terminal, the access link signal strength signal intensity that measurement and this user terminal are associated was sent bandwidth request information to affiliated base station then.
Further, said method also can comprise, among the said step a2, comprises the channel condition information of the access link that said relay station is associated with said user terminal and the bandwidth request information of said user terminal in the bandwidth request information that said relay station sends.
Further, said method can comprise that also said access link signal strength signal intensity comprises signal to noise ratio or Signal Interference and Noise Ratio.
Further; Said method also can comprise, also comprises the base station in the response message that said permission inserts and be the channel resource information of the repeated link distribution that access link that said user terminal is associated with said relay station and said relay station and this base station be associated.
Further; Said method also can comprise; If there are not enough resources to support the access of said user terminal in the base station cell, the response message that then said base station is inserted refusal of relay station feedback is after relay station receives the response message from the refusal access of base station; Oneself is hung, not to terminal feedback information.
Further, said method can comprise that also among the said step b, in period of time T, said user terminal receives the said response message from relay station, and definite final objective relay station and target BS, may further comprise the steps,
If receive response message from the permission access of a plurality of relay station feedbacks; Then this user terminal is measured its access link signal strength signal intensity that is associated with each relay station respectively; This user terminal selecting is the maximum final path of inserting of link conduct of access link signal strength signal intensity wherein; Defining relay station corresponding in this path is target relay, and corresponding base station is a target BS.
Further, said method can comprise that also said access link signal strength signal intensity comprises signal to noise ratio or Signal Interference and Noise Ratio.
Further, said method also can comprise, in period of time T, does not continue to wait for if said user terminal is received the feedback of any relay station.
Further; Said method also can comprise; Among the said step b, after said user terminal was confirmed final objective relay station and target BS, said user terminal was to the selection result of all relay station that is adjacent broadcasting to target relay and target BS; Send relaying starting command, access network to target relay simultaneously.
Compared with prior art, use the inventive method,, realize the network insertion of user terminal in the common overlay area of a plurality of cell edges through the relaying of radio repeater station.
Description of drawings
Fig. 1 is the method flow diagram that user terminal passes through the wireless relay access network in the specific embodiment of the invention;
Fig. 2 is the sketch map of topology of networks described in the specific embodiment of the invention;
Fig. 3 is the flow chart that user terminal passes through the wireless relay access network in the instantiation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the invention is described further.
In the specific embodiment of the invention; At least comprise a plurality of base stations, a plurality of relay station and a user terminal in the said network; Wherein said each base station has connected a relay station at least; Said user terminal is within the coverage of said relay station, and said user terminal can only come access network through the relaying of relay station.
In the specific embodiment of the invention, said user terminal comprises, the user terminal of cell edge or the user terminal outside the sub-district, some user terminals in the scope that particularly a plurality of relay stations cover.
Of Fig. 1, the user terminal of the specific embodiment of the invention may further comprise the steps through the method for wireless relay access network:
Step 110: user terminal sends bandwidth request information to neighboring relay stations, and starts timer, and the time cycle is T;
Step 120: after relay station is received the bandwidth request information of said user terminal, this bandwidth request information is transmitted to the base station under it;
After relay station was received the bandwidth request information of said user terminal, the access link signal strength signal intensity that measurement and this user terminal are associated was sent bandwidth request information to affiliated base station then.
Said access link signal strength signal intensity comprises signal to noise ratio or Signal Interference and Noise Ratio.
Comprise the channel condition information of the access link that said relay station is associated with said user terminal and the bandwidth request information of said user terminal in the bandwidth request information that said relay station sends.
Step 130: the said bandwidth request information that transmit according to its local resource operating position and relay station said base station, whether this base station cell in have enough resource support the access of said user terminal, if then execution in step 140 if judging; Otherwise execution in step 150;
Step 140: the said base station response message that a permission inserts to the relay station feedback, and be that access link and repeated link distribute respective channel resource, execution in step 160;
Said response message is an ACK information.
Step 150: the response nack message that a refusal inserts is fed back to relay station in said base station, and relay station receives after the refusal access response nack message from the base station, and oneself is hung, and does not feed back any information to user terminal, and flow process finishes;
Step 160: the relay station of receiving the response message that allows access is transmitted to said user terminal with this response message;
Said response message is an ACK information.
Also comprise the channel resource information of base station in the said ACK information for access link relevant and repeated link distribution with said relay station.
Also comprise the base station in the response message that said permission inserts and be the channel resource information of the repeated link distribution that access link that said user terminal is associated with said relay station and said relay station and this base station be associated.
Step 170: in period of time T, said user terminal receives the said response message from relay station, and definite final objective relay station and target BS;
Said response message is an ACK information.
User terminal comprises following process to the selection of said target relay and target BS:
In period of time T,, said user terminal do not continue to wait for if receiving the feedback of any relay station;
If receive that then user terminal is measured the pairing access link signal strength signal intensity of each relay station respectively, such as signal to noise ratio snr or Signal Interference and Noise Ratio SINR from the ACK information of a plurality of relay station feedbacks; User terminal selecting is the maximum final path of inserting of link conduct of access link signal strength signal intensity wherein, and defining relay station corresponding in this path is target relay, and corresponding base station is a target BS.
The access link signal strength signal intensity comprises signal to noise ratio snr or Signal Interference and Noise Ratio SINR.
Step 180: said user terminal is broadcasted the selection result to target relay and target BS to all relay stations that are adjacent, and sends relaying starting command, access network to target relay simultaneously.
Said user terminal comprises the sign of target relay, the sign of target BS (CID) in relay station broadcasting selection result, and access link that is associated with said target relay and repeated link channel resource allocation result's affirmation signal.
Below in conjunction with instantiation the present invention is described further.
Fig. 2 has provided topology of networks sketch map according to the invention.According to shown in Figure 2, a plurality of base stations, a plurality of relay station and a user terminal are arranged in the network, each relay station has all inserted a base station respectively, and can not mutual communication between relay station and the relay station.User terminal is within the coverage of above-mentioned all relay stations, and this user terminal can only could connect with network through the relaying of relay station, and accepts the service of network.
In relay system; End-to-end transmission link is made up of access link (Access Link) and repeated link (Relay Link); Wherein, repeated link is initial or ends at the communication link of user terminal that repeated link is defined as the communication link between base station and the relay station.
Fig. 3 has described the flow process of user terminal through the wireless relay access network, may further comprise the steps,
The channel condition of the access link that comprises the bandwidth request of user terminal in the information of transmitting and be associated with said relay station.
If there are enough resources to support the access of this user terminal in this base station cell, then feed back a response ACK information that allows access, and be that access link and repeated link distribute the respective channel resource; Otherwise feed back the response nack message that a refusal inserts, relay station receives after the refusal access response nack message from the base station, and oneself is hung, and does not feed back any information to user terminal, and flow process finishes.
Information and the base station that comprises said base station in the said ACK information is relay station is relevant therewith the access link and the channel resource information of repeated link distribution.
If user terminal is not received the permission access information ACK from the base station of any relay station feedback, then continue to wait for; If user terminal receives the ACK information from a plurality of relay station feedbacks; Then user terminal is measured the pairing access link signal strength signal intensity of each relay station respectively; Such as signal to noise ratio snr or Signal Interference and Noise Ratio SINR; Select the wherein maximum final path of inserting of link conduct of access link signal strength signal intensity, defining relay station corresponding in this path is target relay, and corresponding base station is a target BS.
Comprise the sign of selected target relay, the sign of target BS (CID) in the said link broadcast message, and access link that is associated with said target relay and repeated link channel resource allocation result's affirmation signal.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a user terminal is through the method for wireless relay access network, and it is based on, and relay communications system realizes, said system comprises base station, relay station and user terminal, it is characterized in that, may further comprise the steps,
The channel condition of bandwidth request information that the user terminal that transmit according to its local resource operating position, relay station a, said base station sends and the access link that is associated with said relay station; Whether judge has enough resources to support the access of said user terminal in this base station cell; If; The then said base station response message that a permission inserts to the relay station feedback, and be that access link and repeated link distribute the respective channel resource;
B, receive that the relay station of the response message that allow to insert is transmitted to said user terminal with this response message; User terminal receives the said response message from relay station; And definite final objective relay station and target BS, send relaying starting command, access network to target relay.
2. the method for claim 1 is characterized in that, comprise among the said step a,
A1: said user terminal sends bandwidth request information to neighboring relay stations, and starts timer, and the time cycle is T;
A2: after relay station was received the bandwidth request information of said user terminal, the access link signal strength signal intensity that measurement and this user terminal are associated was sent bandwidth request information to affiliated base station then.
3. method as claimed in claim 2; It is characterized in that; Among the said step a2, comprise the channel condition information of the access link that said relay station is associated with said user terminal and the bandwidth request information of said user terminal in the bandwidth request information that said relay station sends.
4. method as claimed in claim 2 is characterized in that, among the said step a2, said access link signal strength signal intensity comprises signal to noise ratio or Signal Interference and Noise Ratio.
5. the method for claim 1; It is characterized in that, also comprise the base station in the response message that said permission inserts and be the channel resource information of the repeated link distribution that access link that said user terminal is associated with said relay station and said relay station and this base station be associated.
6. the method for claim 1; It is characterized in that; If there are not enough resources to support the access of said user terminal in the base station cell, the response message that then said base station is inserted refusal of relay station feedback is after relay station receives the response message from the refusal access of base station; Oneself is hung, not to terminal feedback information.
7. method as claimed in claim 2 is characterized in that, among the said step b, in period of time T, said user terminal receives the said response message from relay station, and definite final objective relay station and target BS, may further comprise the steps,
If receive response message from the permission access of a plurality of relay station feedbacks; Then this user terminal is measured its access link signal strength signal intensity that is associated with each relay station respectively; This user terminal selecting is the maximum final path of inserting of link conduct of access link signal strength signal intensity wherein; Defining relay station corresponding in this path is target relay, and corresponding base station is a target BS.
8. method as claimed in claim 7 is characterized in that, said access link signal strength signal intensity comprises signal to noise ratio or Signal Interference and Noise Ratio.
9. method as claimed in claim 2 is characterized in that, in period of time T, does not continue to wait for if said user terminal is received the feedback of any relay station.
10. the method for claim 1; It is characterized in that; Among the said step b, after said user terminal was confirmed final objective relay station and target BS, said user terminal was to the selection result of all relay station that is adjacent broadcasting to target relay and target BS; Send relaying starting command, access network to target relay simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007101498635A CN101389128B (en) | 2007-09-10 | 2007-09-10 | Method for network access of customer terminal through radio relay |
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| CN2007101498635A CN101389128B (en) | 2007-09-10 | 2007-09-10 | Method for network access of customer terminal through radio relay |
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| CN101389128A CN101389128A (en) | 2009-03-18 |
| CN101389128B true CN101389128B (en) | 2012-02-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101883363B (en) * | 2009-05-08 | 2013-05-22 | 电信科学技术研究院 | Resource allocation method, device and system |
| WO2011053865A2 (en) * | 2009-10-30 | 2011-05-05 | Research In Motion Limited | Downlink mcs selection in a type 2 relay network |
| CN101795481B (en) * | 2010-03-22 | 2012-07-04 | 普天信息技术研究院有限公司 | Method for accessing client to service cell in long term evolution advanced system |
| CN113055457B (en) * | 2021-03-09 | 2024-01-09 | 百果园技术(新加坡)有限公司 | Access control and data forwarding method and device, electronic equipment and storage medium |
| CN115707066A (en) * | 2021-08-13 | 2023-02-17 | 中兴通讯股份有限公司 | Access method, device, storage medium and electronic device for cell served by base station |
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| CN101006660A (en) * | 2004-08-18 | 2007-07-25 | 摩托罗拉公司 | Method and apparatus for transparent relaying |
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| CN101006660A (en) * | 2004-08-18 | 2007-07-25 | 摩托罗拉公司 | Method and apparatus for transparent relaying |
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