CN101094506A - Random access method, system, transmitting set, and receiving set - Google Patents
Random access method, system, transmitting set, and receiving set Download PDFInfo
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- CN101094506A CN101094506A CNA200610090404XA CN200610090404A CN101094506A CN 101094506 A CN101094506 A CN 101094506A CN A200610090404X A CNA200610090404X A CN A200610090404XA CN 200610090404 A CN200610090404 A CN 200610090404A CN 101094506 A CN101094506 A CN 101094506A
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Abstract
The method comprises: the both terminal and its affiliated base station set up the corresponding relation between the signature sequence and the service channel link information; a) terminal scrambles the scrambling code generated by using its own MACID of fast access prefix of the signature sequence used for representing the service channel link information, and sends it to the base station affiliated by the terminal; b) the base station affiliated by the terminal uses the scrambling code generated by MACID of terminal to descramble the fast access prefix to get the signature sequence included by the access prefix, and after confirming the service channel link information according to the preset correlated relation, allocates the service channel link resource allocated to the terminal by said information to the terminal; according to the received resource, the terminal establishes the service channel link with its affiliated base station.
Description
Technical field
The present invention relates to the access technology of terminal in wireless communication system, particularly a kind of method, system, emitter and receiving system that inserts at random.
Background technology
Wireless communication system all needs to provide communication service for the terminal of some, and these terminals are dispersed in the different base station coverage of wireless communication system.When terminal will communicate, at first need to initiate random access procedure to affiliated base station, therefore, access technology all occupies an important position in various types of wireless communication systems at random.
Random access procedure comprise terminal obtain the resource of the up channel synchronizing information of base station, application Traffic Channel link and set up terminal and affiliated base station between Traffic Channel link etc.Random access procedure normally terminal is initiated by terminal under the captive prerequisite in the down-going synchronous process, and the situation that terminal is initiated to insert at random comprises: terminal by affiliated base station calling, have business to send when terminal is in idle condition; Under moving to, terminal needs to switch to the sub-district of another base station administration behind the cell edge of base station administration; Interrupt suddenly for a certain reason terminal and affiliated base station, need rebulid to communicate to connect etc.
In a radio communication multiple access system, because a plurality of terminals that synchronization has same base station to administer might be initiated to insert at random simultaneously, take identical Random Access Channel, make in random access procedure, certain collision probability is arranged between different terminals.How reducing the collision probability in the random access procedure, realize the random access procedure of terminal, is the problem that needs consideration at present.
The method flow diagram that Fig. 1 inserts at random for the prior art terminal, its concrete steps are:
Signature sequence is taken as long 1024 Walsh sign indicating number sequence, also can be with other sequences, as GCL sequence and PN sequence etc. as signature sequence.Signature sequence is divided into some groups, is used for representing different information.For example, the Access Preamble that terminal is initiated is divided into three grades, then signature sequence can be divided into 3 groups, and the signature sequence in first group represents that priority is 1; Signature sequence in second group represents that priority is 2; Signature sequence in the 3rd group represents that priority is 3.When signature sequence is represented more information, when also comprising the pilot power grade that terminal receives, signature sequence can be divided into more group, a plurality of signature sequences in each group can be distinguished a corresponding random identification (ID).According to the priority of Access Preamble and other Information Selection signature sequence groups of terminal, the ID at random that produces according to terminal determined a corresponding signature sequence in selected signature sequence group then, is carried at Access Preamble and sends when terminal inserted at random.
For the identical signature sequence of length, the information of expression is many more, the signature sequence group of dividing is also just many more, signature sequence number in every group is just few more, corresponding ID at random is also few more, because different terminals selects different random ID to send Access Preamble, therefore, if ID is very few at random, the collision probability of the Access Preamble that different terminals sends in the random access procedure is increased.In order to guarantee less collision probability, the signature sequence group that requires usually to divide is difficult for too much, and just the represented information of signature sequence is fewer.
Correspondingly, on base station under the terminal, the corresponding relation of signature sequence and represented information can be set also, the information that the included signature sequence of Access Preamble that receives is represented can be determined according to this corresponding relation in the base station under the terminal.
Here, Access Preamble generally can send to affiliated base station after terminal is carried out the scrambler scrambling, scrambler be terminal set in advance and with affiliated base station be provided with identical.
The base station did not send the affirmation information of acknowledging receipt of Access Preamble really under step 101, terminal received in the time of setting, after the time that the castle is set, resend Access Preamble, at this moment, ID can generate once more at random at random, thereby the signature sequence that Access Preamble is comprised can change.
After the base station captures the Access Preamble of terminal transmission under step 102, the terminal, send confirmation by Forward Common Control Channel to terminal, comprise in this confirmation that this base station assigns is to the included signature sequence index of MACID, the Access Preamble of terminal, the uplink channel resources that sends connection request message and timing information etc.
Here, the base station captures the Access Preamble that terminal sends under the terminal, use the Access Preamble after the scrambling that terminal is sent with the identical scrambler of terminal setting to carry out descrambling exactly, if descrambling success, then obtain Access Preamble, thereby obtain the signature sequence that Access Preamble comprises, the information of representing according to signature sequence is the uplink channel resources of terminal distribution medium access control sign (MACID) and transmission connection request message.
What step 101 was mentioned can have multiple scheme about keeping out of the way retransmission technique, is not repeated here.
Though the described method of Fig. 1 has realized random access procedure, this process exists bigger time delay.This be because, when inserting at random, the base station need by twice resource allocation just can finish and terminal between the foundation of Traffic Channel link.For the first time be that the base station sends the required uplink channel resources of transmission connection request message that is distributed to terminal, and on up, realize the synchronous of terminal and base station; For the second time be to be terminal distribution Traffic Channel link resource requirement according to connection request message.This random access procedure is fit to for the terminal initial access base station, because at this moment terminal is not assigned with MSCID, be that access procedure can only be undertaken by the mode of competition, promptly send the Access Preamble that comprises signature sequence, very possible and the other-end collision of this signature sequence is so the base station needs the process of a collision detection.But the random access procedure of terminal when switching, connect and set up the back terminal and apply for the random access procedure of Traffic Channel link again and connect the random access procedure of setting up under the situations such as back terminal and base station be out of touch for the minizone, there is not the problem that to collide with other-end, if adopt the described method of Fig. 1, then can increase the time delay of random access procedure, reduce the efficient that terminal inserts at random.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that inserts at random, and this method can reduce the time delay of terminal random access procedure, improves the efficient that terminal inserts at random.
The present invention also provides a kind of system that inserts at random, and this system can reduce the time delay of terminal random access procedure, improves the efficient that terminal inserts at random.
The present invention also provides a kind of emitter that inserts at random, and this device can select different random access procedures to insert according to different access situations at random.
The present invention also provides a kind of receiving system that inserts at random, and this device can be received in the Access Preamble that sends in the different random access procedure.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of method that inserts at random, the base station is provided with the corresponding relation of signature sequence and represented Traffic Channel link information under terminal and the terminal, and this method also comprises:
A, terminal send to the affiliated base station of terminal after fast Access Preamble employing self medium access control that comprises the signature sequence of representing the Traffic Channel link information is identified the scrambler scrambling of MACID generation;
After the base station is carried out descrambling with the scrambler of the MACID generation of terminal to fast Access Preamble under the B, terminal, obtain the signature sequence that Access Preamble comprises, after determining represented Traffic Channel link information according to the corresponding relation that is provided with, will be that the Traffic Channel link circuit resource of terminal distribution sends to terminal according to this information;
C, terminal carry out according to the resource that receives and affiliated base station between the foundation of Traffic Channel link.
Before steps A, this method also comprises:
Whether terminal judges self has MACID, if, execution in step A then; Otherwise, then insert at random according to slow random access procedure.
A kind of system that inserts at random, this system comprise terminal and the affiliated base station of terminal, wherein,
In terminal, fast Access Preamble sequencer generates the fast Access Preamble that comprises signature sequence according to the Traffic Channel link information and sends to the prefix sequence selector, carry out the selection of fast random access procedure type after, send to scrambling module; Scrambling generator 1 sends to the scrambler sequence selector after generating scrambler according to the MACID of terminal, carry out the selection of fast random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the fast Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the modulating in OFDM module, give affiliated base station by antenna transmission;
Under terminal in the base station, after the OFDM demodulation module carries out the OFDM demodulation to the data that receive from antenna, send to the channel demultiplexing module and carry out demultiplexing, data, the data of other control channels and the prefix sequence of Random Access Channel of the data channel that obtains respectively sent to data channel, other control channels and Random Access Channel respectively; Random Access Channel sends to descrambling module with prefix sequence; Scrambling generator 1 sends to the scrambler sequence selector after scrambling generator 1 is generated scrambler according to the MACID of administration terminal, carry out the selection of fast random access procedure type after, send to descrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to descrambling module; After descrambling module adopts the scrambler that receives from the scrambler sequence selector that the Access Preamble that receives from Random Access Channel is carried out descrambling successively, with the Access Preamble that obtains and in the descrambling process determined access style at random send to Access Preamble detector at random, the Access Preamble detector determines that according to the access style at random that receives the information of obtaining carries out fast random access procedure or slow random access procedure from Access Preamble at random.
In terminal, also comprise:
Slow Access Preamble sequencer generates the slow Access Preamble that comprises signature sequence according to random identification ID and information and sends to the prefix sequence selector, carry out the selection of slow random access procedure type after, send to scrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the slow Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the OFDM modulation module, give affiliated base station by antenna transmission.
A kind of emitter that inserts at random, this device comprises:
Fast Access Preamble sequencer generates the fast Access Preamble that comprises signature sequence according to the Traffic Channel link information and sends to the prefix sequence selector, carry out the selection of fast random access procedure type after, send to scrambling module; Scrambling generator 1 sends to the scrambler sequence selector after generating scrambler according to the MACID of terminal, carry out the selection of fast random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the fast Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the modulating in OFDM module, go out by antenna transmission.
This device further comprises:
Slow Access Preamble sequencer generates the slow Access Preamble that comprises signature sequence according to random identification ID and information and sends to the prefix sequence selector, carry out the selection of slow random access procedure type after, send to scrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the slow Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the OFDM modulation module, go out by antenna.
A kind of receiving system that inserts at random, this device comprises:
After the OFDM demodulation module carries out the OFDM demodulation to the data that receive from antenna, send to the channel demultiplexing module and carry out demultiplexing, data, the data of other control channels and the prefix sequence of Random Access Channel of the data channel that obtains respectively sent to data channel, other control channels and Random Access Channel respectively; Random Access Channel sends to descrambling module with prefix sequence; Scrambling generator 1 sends to the scrambler sequence selector after scrambling generator 1 is generated scrambler according to the MACID of administration terminal, carry out the selection of fast random access procedure type after, send to descrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to descrambling module; After descrambling module adopts the scrambler that receives from the scrambler sequence selector that the Access Preamble that receives from Random Access Channel is carried out descrambling successively, with the Access Preamble that obtains and in the descrambling process determined access style at random send to Access Preamble detector at random, the Access Preamble detector determines that according to the access style at random that receives the information of obtaining carries out fast random access procedure or slow random access procedure from Access Preamble at random.
From such scheme as can be seen, the invention provides a kind of fast random access procedure, when this process comprised the Access Preamble of signature sequence in the terminal transmission, the scrambler that generates with self MAC ID carried out sending to affiliated base station after the scrambling to this Access Preamble; The MACID of terminal carried out descrambling to this Access Preamble that receives during adopted the base station under the terminal, thereby obtaining the represented Traffic Channel link information of signature sequence that Access Preamble comprises, is to send to terminal behind the terminal distribution Traffic Channel link circuit resource according to this information; Terminal is carried out the setting of Traffic Channel link according to the resource of being distributed.Because the present invention in carrying out random access procedure, only carries out the first resource distribution and does not need to carry out collision detection, so the present invention has reduced the time delay of terminal random access procedure, has improved the efficient that terminal inserts at random.
Description of drawings
The method flow diagram that Fig. 1 inserts at random for the prior art terminal;
The method flow diagram that Fig. 2 inserts at random for terminal of the present invention;
The emitter schematic diagram that Fig. 3 inserts at random for the present invention;
The receiving system schematic diagram that Fig. 4 inserts at random for the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
In order to reduce the time delay of terminal random access procedure, improve the efficient that terminal inserts at random, the present invention is directed to the different access situation of terminal, adopt different accidental access methods: for the terminal initial access base station, be terminal when not getting access to the MACID that distributes the base station, adopt the described method of Fig. 1 in the prior art; For terminal access base station in other cases, be that terminal is when having got access to the MACID that distributes the base station, the random access procedure of terminal when switching, connect and set up the back terminal and apply for the random access procedure of Traffic Channel link again and connect that to set up back terminal and base station out of touch etc., then adopt fast random access procedure as the minizone.The described random access procedure of Fig. 1 is called slow random access procedure here; The random access procedure that the present invention is adopted is called fast random access procedure.
In fast random access procedure, fast Random Access Channel is set between base station and the terminal, to form by signature sequence at the fast Access Preamble of this Channel Transmission, this signature sequence is represented Traffic Channel link relevant information.This service link relevant information can comprise: QoS of survice and maximum sub-carrier number, the pilot power grade of receiving and the priority of connection request message etc.This Access Preamble carries out sending after the scrambler scrambling in terminal, and the generation of this scrambler is relevant with the MACID that distributes to this terminal, and different MACID obtains different scramblers.The algorithm that MACID generates scrambler can adopt various algorithms, but must guarantee that terminal is identical with the employed algorithm in base station.In addition, at the corresponding relation that also needs on the base station to be provided with between signature sequence and the represented Traffic Channel link relevant information, thereby can resolve the represented Traffic Channel link relevant information of signing messages that the fast Access Preamble that obtains comprises, thereby be terminal distribution Traffic Channel link circuit resource.
In slow random access procedure, slow Random Access Channel is set between base station and the terminal, slow Access Preamble in this Channel Transmission is made up of signature sequence, this signature sequence is represented relevant information and ID at random, and this relevant information comprises the pilot power grade that receives and priority of connection request message etc.This Access Preamble carries out sending after the scrambling in terminal, and this scrambler sets in advance and be identical with the scrambler of base station setting.
The method flow diagram that Fig. 2 inserts at random for terminal of the present invention, its concrete steps are:
The base station captures the fast Access Preamble that end step 202 sends under step 203, the terminal, obtain signature sequence, according to after obtaining represented Traffic Channel link relevant information and being terminal distribution Traffic Channel link circuit resource, to send to terminal by Common Control Channel for the Traffic Channel link circuit resource and the timing alignment information of terminal distribution, these information can be with identifying for the MACID of terminal distribution.
The process of catching Access Preamble is: with by the scrambler of the MACID generation of institute's administration terminal distribution with terminal identical scrambler is set and one by one Access Preamble is carried out descrambling, if the scrambler descrambling that the enough MACID of energy generate is successful, then capture this Access Preamble of corresponding MACID.
The emitter schematic diagram that Fig. 3 inserts at random for the present invention, as shown in the figure, this device comprises:
When carrying out fast random access procedure, the Traffic Channel link information that is comprised according to connection request message by fast Access Preamble sequencer generates the fast Access Preamble that comprises signature sequence and sends to the prefix sequence selector, after carrying out the selection of fast random access procedure type, send to scrambling module; Scrambling generator 1 sends to the scrambler sequence selector after generating scrambler according to the MACID of terminal, carry out the selection of fast random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the fast Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by OFDM (OFDM) modulation module, go out by antenna transmission.
When carrying out slow random access procedure, generate the slow Access Preamble that comprises signature sequence by slow Access Preamble sequencer according to ID and other information at random and send to the prefix sequence selector, after carrying out the selection of slow random access procedure type, send to scrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the slow Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the OFDM modulation module, go out by antenna transmission.
The receiving system schematic diagram that Fig. 4 inserts at random for the present invention, as shown in the figure:
After the OFDM demodulation module carries out the OFDM demodulation to the data that receive from antenna, send to the channel demultiplexing module and carry out demultiplexing, data, the data of other control channels and the prefix sequence of Random Access Channel of the data channel that obtains respectively sent to data channel, other control channels and Random Access Channel respectively; Random Access Channel sends to descrambling module with prefix sequence; Scrambling generator 1 sends to the scrambler sequence selector after scrambling generator 1 is generated scrambler according to the MACID of administration terminal, carry out the selection of fast random access procedure type after, send to descrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to descrambling module; After descrambling module adopts the scrambler that receives from the scrambler sequence selector that the Access Preamble that receives from Random Access Channel is carried out descrambling successively, with the Access Preamble that obtains and in the descrambling process determined access style at random send to Access Preamble detector at random, the Access Preamble detector is determined the information obtained from Access Preamble according to the access style at random that receives at random: for inserting at random slowly, extract relevant information from Access Preamble; For inserting at random soon, from Access Preamble, extract the Traffic Channel link information.
The device of Fig. 3 and Fig. 4 is separately positioned under terminal and the terminal behind the base station, just can produces the system that inserts at random, adopt the antenna transmission data between the two.
In the present invention, fast Access Preamble at random also can adopt long 1024 Walsh sign indicating number, and just the terminal scrambler that need generate through the MACID of terminal when sending Access Preamble carries out scrambling.Because the prefix sequence of different terminals is distinguished by the scrambler that different MACID generates, so can not bump.For fast random access procedure, do not need to carry ID at random, therefore in signature sequence, can represent more Traffic Channel link information.As length be in 1024 the Walsh sequence sets after, the Walsh sign indicating number sequence of 1024 quadratures is arranged, therefore, can carry the information of 10 bits at most, owing to do not need to carry ID at random, so utilize this 10 bits, signature sequence can be represented more Traffic Channel link information.Certainly, certainly, of the present invention soon at random Access Preamble also can adopt other sequences, as GCL sequence and PN sequence etc.
In slow random access procedure, because ID is that a plurality of terminal challenge are used at random, so might there be the collision of multiple terminals in the received slow prefix sequence of receiving terminal, so, the same with prior art in subsequent process, need carry out collision detection.
Lift three specific embodiment explanation the present invention.
Embodiment one: when terminal is carried out the switching of minizone, can adopt the process that inserts Target cell soon at random provided by the invention, process is: at first, source base station sends to target BS under the terminal with the Traffic Channel link information under the terminal, because the Traffic Channel link of terminal and source base station is set up, the resource source base station of this Traffic Channel link is all known, and source base station can directly send to target BS with the Traffic Channel link information; Secondly, terminal sends the fast Access Preamble after the scrambler scrambling that generates through self MAC ID to target BS, this fast Access Preamble comprises signature sequence, because a part of Traffic Channel link information sends to target BS by source base station, so this signature sequence can reduce the amount of information of represented Traffic Channel link information, just can reduce the signature sequence number of use, help improving the speed that target BS is caught fast Access Preamble like this; At last, target BS is caught fast Access Preamble, behind terminal distribution Traffic Channel link circuit resource, sends to the setting of terminal carrying out service link.
Embodiment two: after connecting between terminal and the base station, the out of touch situation that inserts at random in base station and sub-district also can adopt fast random access procedure of the present invention owing to reasons such as decline make.At this moment, the base station kept this terminal some with environment different and constant information, therefore, terminal only need comprise expression when sending Access Preamble have the signature sequence with the different information that change of environment such as descending pilot frequency power or signal to noise ratio, helps improving the speed that target BS is caught fast Access Preamble like this.
Embodiment three: after connecting between terminal and the base station, the access situation at random of Traffic Channel link that please be new in needing also can adopt fast random access procedure of the present invention.
For the usable condition of fast random access procedure provided by the invention, be not limited to several situation of the present invention, the access situation at random when having had MACID for all terminals can adopt fast random access procedure provided by the invention.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1, a kind of method that inserts at random is characterized in that, the base station is provided with the corresponding relation of signature sequence and represented Traffic Channel link information under terminal and the terminal, and this method also comprises:
A, terminal send to the affiliated base station of terminal after fast Access Preamble employing self medium access control that comprises the signature sequence of representing the Traffic Channel link information is identified the scrambler scrambling of MACID generation;
After the base station is carried out descrambling with the scrambler of the MACID generation of terminal to fast Access Preamble under the B, terminal, obtain the signature sequence that Access Preamble comprises, after determining represented Traffic Channel link information according to the corresponding relation that is provided with, will be that the Traffic Channel link circuit resource of terminal distribution sends to terminal according to this information;
C, terminal carry out according to the resource that receives and affiliated base station between the foundation of Traffic Channel link.
2, the method for claim 1 is characterized in that, before steps A, this method also comprises:
Whether terminal judges self has MACID, if, execution in step A then; Otherwise, then insert at random according to slow random access procedure.
3, a kind of system that inserts at random is characterized in that, this system comprises terminal and the affiliated base station of terminal, wherein,
In terminal, fast Access Preamble sequencer generates the fast Access Preamble that comprises signature sequence according to the Traffic Channel link information and sends to the prefix sequence selector, carry out the selection of fast random access procedure type after, send to scrambling module; Scrambling generator 1 sends to the scrambler sequence selector after generating scrambler according to the MACID of terminal, carry out the selection of fast random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the fast Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the modulating in OFDM module, give affiliated base station by antenna transmission;
Under terminal in the base station, after the OFDM demodulation module carries out the OFDM demodulation to the data that receive from antenna, send to the channel demultiplexing module and carry out demultiplexing, data, the data of other control channels and the prefix sequence of Random Access Channel of the data channel that obtains respectively sent to data channel, other control channels and Random Access Channel respectively; Random Access Channel sends to descrambling module with prefix sequence; Scrambling generator 1 sends to the scrambler sequence selector after scrambling generator 1 is generated scrambler according to the MACID of administration terminal, carry out the selection of fast random access procedure type after, send to descrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to descrambling module; After descrambling module adopts the scrambler that receives from the scrambler sequence selector that the Access Preamble that receives from Random Access Channel is carried out descrambling successively, with the Access Preamble that obtains and in the descrambling process determined access style at random send to Access Preamble detector at random, the Access Preamble detector determines that according to the access style at random that receives the information of obtaining carries out fast random access procedure or slow random access procedure from Access Preamble at random.
4, system as claimed in claim 3 is characterized in that, also comprises in terminal:
Slow Access Preamble sequencer generates the slow Access Preamble that comprises signature sequence according to random identification ID and information and sends to the prefix sequence selector, carry out the selection of slow random access procedure type after, send to scrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the slow Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the OFDM modulation module, give affiliated base station by antenna transmission.
5, a kind of emitter that inserts at random is characterized in that this device comprises:
Fast Access Preamble sequencer generates the fast Access Preamble that comprises signature sequence according to the Traffic Channel link information and sends to the prefix sequence selector, carry out the selection of fast random access procedure type after, send to scrambling module; Scrambling generator 1 sends to the scrambler sequence selector after generating scrambler according to the MACID of terminal, carry out the selection of fast random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the fast Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the modulating in OFDM module, go out by antenna transmission.
6, device as claimed in claim 5 is characterized in that, this device further comprises:
Slow Access Preamble sequencer generates the slow Access Preamble that comprises signature sequence according to random identification ID and information and sends to the prefix sequence selector, carry out the selection of slow random access procedure type after, send to scrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to scrambling module; After the scrambler that the scrambling module employing receives from the scrambler sequence selector carries out scrambling to the slow Access Preamble that receives from prefix sequence selection device, on the channel multiplexing module, carry out multiplexing with the data of data channel and other control channels, after carrying out OFDM modulation by the OFDM modulation module, go out by antenna.
7, a kind of receiving system that inserts at random is characterized in that this device comprises:
After the OFDM demodulation module carries out the OFDM demodulation to the data that receive from antenna, send to the channel demultiplexing module and carry out demultiplexing, data, the data of other control channels and the prefix sequence of Random Access Channel of the data channel that obtains respectively sent to data channel, other control channels and Random Access Channel respectively; Random Access Channel sends to descrambling module with prefix sequence; Scrambling generator 1 sends to the scrambler sequence selector after scrambling generator 1 is generated scrambler according to the MACID of administration terminal, carry out the selection of fast random access procedure type after, send to descrambling module; Scrambling generator 2 sends to the scrambler sequence selector with the scrambler that sets in advance, carry out the selection of slow random access procedure type after, send to descrambling module; After descrambling module adopts the scrambler that receives from the scrambler sequence selector that the Access Preamble that receives from Random Access Channel is carried out descrambling successively, with the Access Preamble that obtains and in the descrambling process determined access style at random send to Access Preamble detector at random, the Access Preamble detector determines that according to the access style at random that receives the information of obtaining carries out fast random access procedure or slow random access procedure from Access Preamble at random.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200610090404XA CN101094506A (en) | 2006-06-23 | 2006-06-23 | Random access method, system, transmitting set, and receiving set |
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| CNA200610090404XA CN101094506A (en) | 2006-06-23 | 2006-06-23 | Random access method, system, transmitting set, and receiving set |
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| CNA200610090404XA Pending CN101094506A (en) | 2006-06-23 | 2006-06-23 | Random access method, system, transmitting set, and receiving set |
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| CN (1) | CN101094506A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009089789A1 (en) * | 2008-01-10 | 2009-07-23 | Huawei Technologies Co., Ltd. | Method, terminal and base station for band accessing and switching |
| CN101730191B (en) * | 2008-10-27 | 2013-06-05 | 华为技术有限公司 | Resource allocation method, terminal and communication system |
| CN103260250A (en) * | 2012-02-15 | 2013-08-21 | 华为技术有限公司 | Random access method, base station and user equipment |
| CN104205988A (en) * | 2012-01-31 | 2014-12-10 | 瑞典爱立信有限公司 | Connection setup with an access selection of a terminal |
| CN106448420A (en) * | 2016-12-16 | 2017-02-22 | 湖北工程学院 | Communication target capturing experiment demonstration system and communication target capturing method |
| CN108702696A (en) * | 2016-03-29 | 2018-10-23 | 瑞典爱立信有限公司 | Execute the method for random access and associated terminal device |
| WO2019191861A1 (en) * | 2018-04-02 | 2019-10-10 | Qualcomm Incorporated | Parallel transmission of preamble sequences with data layers for improved data detection |
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2006
- 2006-06-23 CN CNA200610090404XA patent/CN101094506A/en active Pending
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| WO2009089789A1 (en) * | 2008-01-10 | 2009-07-23 | Huawei Technologies Co., Ltd. | Method, terminal and base station for band accessing and switching |
| CN101730191B (en) * | 2008-10-27 | 2013-06-05 | 华为技术有限公司 | Resource allocation method, terminal and communication system |
| CN104205988A (en) * | 2012-01-31 | 2014-12-10 | 瑞典爱立信有限公司 | Connection setup with an access selection of a terminal |
| CN104205988B (en) * | 2012-01-31 | 2018-06-08 | 瑞典爱立信有限公司 | The connection for accessing selection setting with terminal |
| CN106572543A (en) * | 2012-02-15 | 2017-04-19 | 华为技术有限公司 | Random access method, base station and user equipment |
| US9386603B2 (en) | 2012-02-15 | 2016-07-05 | Huawei Technologies Co., Ltd. | Random access method, base station, and user equipment |
| CN103260250B (en) * | 2012-02-15 | 2016-12-07 | 华为技术有限公司 | Accidental access method, base station and subscriber equipment |
| WO2013120456A1 (en) * | 2012-02-15 | 2013-08-22 | 华为技术有限公司 | Method, base station and user equipment for random access |
| CN103260250A (en) * | 2012-02-15 | 2013-08-21 | 华为技术有限公司 | Random access method, base station and user equipment |
| CN106572543B (en) * | 2012-02-15 | 2020-10-23 | 华为技术有限公司 | Random access method, base station and user equipment |
| CN108702696A (en) * | 2016-03-29 | 2018-10-23 | 瑞典爱立信有限公司 | Execute the method for random access and associated terminal device |
| CN108702696B (en) * | 2016-03-29 | 2021-07-13 | 瑞典爱立信有限公司 | Method for performing random access and associated terminal device |
| CN106448420A (en) * | 2016-12-16 | 2017-02-22 | 湖北工程学院 | Communication target capturing experiment demonstration system and communication target capturing method |
| CN106448420B (en) * | 2016-12-16 | 2019-06-18 | 湖北工程学院 | Communication target captures experimental demonstration system and communication target catching method |
| WO2019191861A1 (en) * | 2018-04-02 | 2019-10-10 | Qualcomm Incorporated | Parallel transmission of preamble sequences with data layers for improved data detection |
| US11575551B2 (en) | 2018-04-02 | 2023-02-07 | Qualcomm Incorporated | Parallel transmission of preamble sequences with data layers for improved data detection |
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