CN102170705B - Random access method, wireless access network element and mobile communication system - Google Patents
Random access method, wireless access network element and mobile communication system Download PDFInfo
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Abstract
The embodiment of the invention discloses a random access method, a wireless access network element and a mobile communication system. The random access method comprises the following steps of: receiving an access request from user equipment (UE); performing antenna compensation calculation on the received access request to obtain an antenna-compensated access request; primarily checking the antenna-compensated access request; and/or performing frequency offset compensation on the data part of the antenna-compensated access request to obtain frequency offset-compensated access request, and performing primary checking on the frequency offset-compensated access request; and if the antenna-compensated access request is primarily checked to be correct, performing the random access of the UE based on the antenna-compensated access request; or if the frequency offset-compensated access request is secondarily checked to be correct, performing the random access of the UE based on the frequency offset-compensated access request. The scheme provided by the embodiment of the invention is favorable for improving random access performance.
Description
Technical field
The present invention relates to communication technical field, particularly accidental access method and wireless access network element and mobile communication system.
Background technology
Along with the sustainable development of wireless technology, mobile radio system has existed multiple multi-form, such as comprise: WCDMA (Wideband Code Division Multiple Access, WCDMA access system), WIMAX (Worldwide Interoperability for Microwave Access, global microwave access intercommunication system), 3GPP LTE (3GPP Long Term Evolution, the Long Term Evolution of third generation affiliate) system, the mobile radio systems such as LTE evolution system (LTE-A).
Such as, for LTE/LTE-A system, UE (User Equipment, subscriber equipment) can be referred to as user side, can Node B/eNB (evolved base station), CN (Core Network, core net) be regarded as wireless network side.For WCDMA system, Node B (Node B), radio network controller (RNC, Radio Network Controller) and core net can be regarded as wireless network side, UE is user side, and other communication system by that analogy.
UE before initiation business, need send access request (access request comprises control section and data division) to network side when idle condition; Network side receives the access request that this UE sends, and identifies the message content of access request, then sends access to UE and allows or access signaling.UE is after the network side transmission access request of wireless network, and wireless network side adopts Random Access Channel to process usually.Impact on access performance is moved in order to solve UE, all have employed frequency deviation and estimate process, then estimating that the result of process carries out compensate of frequency deviation to the data division of the access request from UE according to frequency deviation, in the hope of improving the correctness of demodulation message, and then improving the success rate of Stochastic accessing.
Practice finds, carrying out frequency deviation estimation under many circumstances and compensating not only increases access delay, if frequency deviation is now estimated inaccurate, then also may reduce Stochastic accessing speed further.
Summary of the invention
The embodiment of the present invention provides accidental access method and wireless access network element and mobile communication system, to improve Stochastic accessing performance.
For solving the problems of the technologies described above, the embodiment of the present invention provides following technical scheme:
A kind of accidental access method, comprising:
Receive the access request from user equipment (UE);
Antenna compensation calculation is carried out to the described access request received, obtains the access request after antenna compensation;
First verification is carried out to the access request after described antenna compensates; And/or the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after described compensate of frequency deviation;
If the first verification is correct, then perform the Stochastic accessing of described UE based on the access request after described antenna compensation; Or, if the second verification is correct, then perform the Stochastic accessing of described UE based on the access request after described compensate of frequency deviation.
A kind of wireless access network element, comprising:
Receiver module, for receiving the access request from user equipment (UE) by antenna;
Antenna compensating module, carries out antenna compensation calculation for the described access request received described receiver module, obtains the access request after antenna compensation;
First correction verification module, carries out the first verification for the access request after compensating described antenna compensating module antenna; And/or the second correction verification module, obtains the access request after compensate of frequency deviation for carrying out compensate of frequency deviation to the data division of the access request after described antenna compensating module antenna compensation, and carries out the second verification to the access request after described compensate of frequency deviation;
Stochastic accessing Executive Module, for when described first correction verification module execution first verification is correct, performs the Stochastic accessing of described UE based on the access request after described antenna compensation; Or, when described second correction verification module execution second verification is correct, perform the Stochastic accessing of described UE based on the access request after described compensate of frequency deviation.
A kind of mobile communication system, comprising: the wireless access network element as described in above-described embodiment.
Therefore the embodiment of the present invention carries out antenna compensation calculation to the access request received, obtain the access request after antenna compensation; First verification is carried out to the access request after this antenna compensates; And/or compensate of frequency deviation is carried out to the data division of access request after this antenna compensates obtain the access request after compensate of frequency deviation, and the second verification is carried out to the access request after this compensate of frequency deviation; If the first verification is correct, then the Stochastic accessing of the access request execution UE after compensating based on this antenna; If or the second verification is correct, the Stochastic accessing of UE is then performed based on the access request after this compensate of frequency deviation, achieve the choose reasonable of Stochastic accessing processing mode like this, make the processing mode of the Stochastic accessing selected more can be applicable to different application scenarioss, thus improve Stochastic accessing performance.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of a kind of accidental access method that Fig. 1-a provides for the embodiment of the present invention;
The schematic flow sheet of the another kind of accidental access method that Fig. 1-b provides for the embodiment of the present invention;
The schematic flow sheet of another accidental access method that Fig. 1-c provides for the embodiment of the present invention;
The schematic flow sheet of another accidental access method that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of also a kind of accidental access method that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of wireless access network element that Fig. 4 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides accidental access method and wireless access network element and mobile communication system
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be described in detail below by specific embodiment.
An embodiment of accidental access method of the present invention, a kind of accidental access method, comprising: receive the access request from UE; Antenna compensation calculation is carried out to this access request received, obtains the access request after antenna compensation; First verification is carried out to the access request after this antenna compensates; And/or the data division of the access request after compensating this antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation; If the first verification is correct, then perform the Stochastic accessing of this UE based on the access request after the compensation of this antenna; Or, if the second verification is correct, then perform the Stochastic accessing of this UE based on the access request after this compensate of frequency deviation.
See Fig. 1-a, Fig. 1-b and Fig. 1-a, concrete steps can comprise:
110, wireless access network element receives access request;
Wherein, the wireless access network element of embodiment of the present invention indication refers to, can realize the entity of subscriber equipment radio access management function, and it may have different titles, position and product form in different networks.For example, the wireless access network element mentioned in the embodiment of the present invention can refer to: evolved universal mobile communication system (UMTS, Universal Mobile Telecommunications System) evolution base station (eNodeB), Home eNodeB (HeNB) or other type of base station in land radio access web (E-UTRAN, Evolved UMTS Territorial Radio Access Network); Or UMTS Terrestrial radio access network (UTRAN, UMTS Territorial Radio Access Network)/GSM EDGE wireless access network (GERAN, GSM EDGE Radio Access Network) in base station controller or radio network controller (RNC, Radio Network Controller); Or also can refer to Wideband Code Division Multiple Access (WCDMA) access (CDMA, Code Division Multiple Access) there is High Rate Packet Data Access Network (HRPD-AN in network, High Rate Packet Data Access Network) entity, the WLAN (wireless local area network) (WLAN of Access Network logic function, Wireless Local Area Network) in there is the entity of evolution packet data gateway (EPDG, Evolved Packet Data Gateway) Access Network logic function; Micro-wave access global inter communication (WiMAX, Worldwide Interoperability for Microwave Access) realize the entity of terminal wireless access-in management in the access service network base station (ASN-BS, Access Service Network Base Station) of network or other network.
120, wireless access network element carries out antenna compensation calculation to this access request received, and obtains the access request after antenna compensation;
130a, wireless access network element carry out the first verification to the access request after the compensation of this antenna;
The data division of the access request after 130b, wireless access network element compensate this antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation;
Wherein, access request comprises control section and data division, and wherein, control section comprises the control informations such as signature sequence, and data division then comprises the follow-up access information etc. carried out needed for Stochastic accessing.
In actual applications, such as, can adopt flow process as shown in Fig. 1-a, after step 120, perform step 130a and 130b respectively, dividing of sequencing between step 130a and 130b, can not had.Or, also can adopt flow process shown in Fig. 1-b, after performing step 120, first perform step 130a, if the first check errors, then perform step 130b again; Or, adopt flow process as shown in fig 1-c, after performing step 120, first can perform step 130b, if the second check errors, then perform step 130a again.
For example, wireless access network element, after receiving the access request from UE, can obtain the translational speed of this UE further; And can determine according to the translational speed of UE the actuating logic that the first School Affairs second verifies, better to adapt to different application scenarioss, if the translational speed of such as this UE is greater than default threshold speed (now, can think that this UE is current and be in high-speed moving state), then wireless access network element carries out the first verification to the access request after antenna compensation; And compensate of frequency deviation is carried out to the data division of access request after antenna compensates obtain the access request after compensate of frequency deviation, the second verification is carried out to the access request after this compensate of frequency deviation.Or if the translational speed of this UE is less than default threshold speed (now, can think that this UE is current and be in low mobility state or illegal state), then wireless access network element can carry out the first verification to the access request after the compensation of this antenna; If the first check errors, then the data division of the access request after compensating this antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation.Or, also can determine the actuating logic that the first School Affairs second verifies by alternate manner.Wherein, the actuating logic of the first School Affairs second verification that UE high-speed mobile is corresponding, being applicable to the stronger scene of wireless access network element disposal ability can carry out Stochastic accessing faster; And UE low speed moves the actuating logic that the first corresponding School Affairs second verifies, then can ensure the speed of Stochastic accessing when reducing wireless access network element processing pressure as far as possible.
Wherein, the first verification may be cyclic redundancy check (CRC) (CRC, cyclic redundancy check code) or other existing verification mode; Second verification also may be cyclic redundancy check (CRC) or other existing verification mode.Be appreciated that verification mode can have multiple, above cyclic redundancy check (CRC) mode should not be understood as the exhaustive of verification mode as a concrete example, and therefore cyclic redundancy check (CRC) mode should not be construed as the restriction to the embodiment of the present invention.
If the first verification is correct, then perform step 140;
If the second verification is correct, then perform step 150;
140, wireless access network element performs the Stochastic accessing of this UE based on the access request after the compensation of this antenna;
150, wireless access network element performs the Stochastic accessing of this UE based on the access request after this compensate of frequency deviation.
Wherein, because wireless access network element is the Stochastic accessing selecting access request corresponding to correct verification (access request after antenna compensation or the access request after compensate of frequency deviation) to perform this UE, be so just conducive to improving Stochastic accessing performance.
Therefore wireless access network element is by carrying out antenna compensation calculation to the access request received in the present embodiment, obtain the access request after antenna compensation; First verification is carried out to the access request after this antenna compensates; And/or the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation; If the first verification is correct, then the Stochastic accessing of the access request execution UE after compensating based on this antenna; If or the second verification is correct, the Stochastic accessing of UE is then performed based on the access request after this compensate of frequency deviation, achieve the choose reasonable of Stochastic accessing processing mode like this, make the processing mode of the Stochastic accessing selected more can be applicable to different application scenarioss, thus improve Stochastic accessing performance.
For ease of better understanding and implement the such scheme of the embodiment of the present invention, for UE, under high-speed mobile scene, a kind of possibility of (translational speed of this UE is greater than default threshold speed) base station execution UE Stochastic accessing is described below.
See Fig. 2, concrete steps can comprise:
2100, base station receives the access request from UE, performs access channel path search obtain footpath information according to this access request received;
Wherein, search technique comprises: the different modes such as normal searching, path search.Normal searching needs the window original position according to search, and the window width size of search, and the effective diameter carrying out multipath matching operation completing user is searched.Path search refers to when user concrete turn-on time cannot be learnt in base station, carries out omnidistance traversal search turn-on time and obtains user's turn-on time, then carry out multipath coupling turn-on time to user and obtain footpath information the user that may exist.
Wherein, antenna data refers to the data from UE that base station is received by antenna.
The mode receiving data due to base station is that base station is received by antenna, and the data from UE usually received by antenna in wireless communication technique field, are referred to as antenna data.Herein, access request also belongs to antenna data.
2200, base station to access request carry out antenna compensation calculation obtain antenna compensate after access request;
In actual applications, base station can utilize the signature sequence in footpath information, access request and known signature sequence to calculate the channel fading factor; Carry out antenna compensation calculation according to footpath information and this access request of channel fading factor pair calculated, obtain the access request after antenna compensation.
Wherein, access request have passed through wireless channel decline in the process being transferred to base station, and the coefficient of this decline is referred to as the channel fading factor.
Base station can comprise the mode that access request carries out antenna compensation calculation: calculate receive from the access request data of UE and the business of fading factor.Wherein, the data that base station obtains after carrying out antenna compensation calculation to the data received, can regard as UE send do not decline before data.
2300, the access request buffer memory after compensation is two parts by base station;
A copy of it performs step 2310 and processes, and another part performs step 2320 and processes;
2310, the control section of the access request after base station can compensate according to antenna, the data division of this access request carries out frequency deviation estimation (AFC) at (access request comprises control section and data division), the result estimated according to frequency deviation and footpath information carry out compensate of frequency deviation to the data division of this access request, then access channel decoding and cyclic redundancy check (CRC) code (CRC) check processing are carried out (wherein to the access request after compensate of frequency deviation compensates, access channel decoding is that Data Analysis process can obtain CRC effect code, CRC check processing is then verify the CRC check code obtained, with determine whether can correct resolution data), perform step 2400,
2320, the data division of base station to the access request after antenna compensation carries out channel demodulation and CRC check processing, enters step 2400.
2400, a correct road access request is verified to perform the Stochastic accessing of UE in the result that in base station selected step 2310 and 2320, CRC detects.
That is: if the CRC check code of step 2320 is correct, then performs step 2500, if mistake, lose current data; If the CRC check code of step 2310 is correct, then enter 2500; If the CRC check code mistake of step 2310, then abandon current data.
It should be noted that, abandon current data and packet error is described, successfully again can initiate transfer of data because UE can detect that data do not send, therefore abandon current data and not necessarily can cause random access failure.
2500, base station performs the Stochastic accessing of UE based on the access request that correct verification is corresponding.
Be appreciated that the present embodiment is illustrated with CRC check.Verification mode can have multiple, and CRC check mode should not be understood as all applicable verification modes as a concrete example exhaustive, and therefore CRC check mode should not be construed as the restriction to the present embodiment verification mode.
Therefore wireless access network element is by carrying out antenna compensation calculation to the access request received in the present embodiment, obtain the access request after antenna compensation; If UE is current be in high-speed moving state, then the access request after the compensation of this antenna is verified; The data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and verifies the access request after this compensate of frequency deviation; Select access request corresponding to correct verification to perform the Stochastic accessing of UE, achieve the choose reasonable of Stochastic accessing processing mode like this, make the processing mode of the Stochastic accessing selected more can be applicable to different application scenarioss, thus improve Stochastic accessing performance.
For ease of better understanding and implement the such scheme of the embodiment of the present invention, for UE, under low speed mobile context, a kind of possibility of (translational speed of this UE is less than default threshold speed) base station execution UE Stochastic accessing is described below.
See Fig. 3, concrete steps can comprise:
3100, base station receives the access request from UE, performs access channel path search obtain footpath information according to this access request received;
3200, base station to access request carry out antenna compensation calculation obtain antenna compensate after access request;
In actual applications, base station can utilize the signature sequence in footpath information, access request and known signature sequence to calculate the channel fading factor; Carry out antenna compensation calculation according to footpath information and this access request of channel fading factor pair calculated, obtain the access request after antenna compensation.
Wherein, access request have passed through wireless channel decline in the process being transferred to base station, and the coefficient of this decline is referred to as the channel fading factor.
Base station can comprise the mode that access request carries out antenna compensation calculation: calculate receive from the access request data of UE and the business of fading factor.Wherein, the data that base station obtains after carrying out antenna compensation calculation to the data received, can regard as UE send do not decline before data.
3300, the access request buffer memory after compensation is two parts by base station;
A copy of it performs step 3210 and processes, and the pending steps 3410 such as another part process;
3310, the data division of base station to the access request after antenna compensation carries out channel demodulation and CRC check processing, enters step 3400.
If the CRC check code in 3400 steps 3310 is correct, then perform step 3500, if the CRC check code mistake in step 3310, then perform step 3410, and abandon current data;
3410: the control section of the access request after base station can compensate according to antenna, the data division of this access request carries out frequency deviation estimation (AFC) at (access request comprises control section and data division), the result estimated according to frequency deviation and footpath information carry out compensate of frequency deviation to the data division of this access request, then access channel decoding and cyclic redundancy check (CRC) code (CRC) check processing are carried out (wherein to the access request after compensate of frequency deviation compensates, access channel decoding is that Data Analysis process can obtain CRC effect code, CRC check processing is then verify the CRC check code obtained, with determine whether can correct resolution data).
If the CRC check code that step 3410 carries out CRC check processing is correct, then performs 3500, if CRC check code mistake, then abandon current data;
3500, base station performs the Stochastic accessing of UE based on the access request that correct verification is corresponding.
Be appreciated that the present embodiment is illustrated with CRC check.Certainly, verification mode can have multiple, and CRC check mode should not be understood as all applicable verification modes as a concrete example exhaustive, and CRC check mode should not be construed as the restriction to the present embodiment verification mode.
Therefore wireless access network element is by carrying out antenna compensation calculation to the access request received in the present embodiment, obtain the access request after antenna compensation; If UE is current be in low mobility state, then the access request after the compensation of this antenna is verified; If verification is correct, the Stochastic accessing of the access request execution UE after then compensating based on antenna, if check errors, then the data division of the access request after compensating this antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and verifies the access request after this compensate of frequency deviation; If verification is correct, the Stochastic accessing of UE is then performed based on the access request after this compensate of frequency deviation, achieve the choose reasonable of Stochastic accessing processing mode like this, make the processing mode of the Stochastic accessing selected more can be applicable to different application scenarioss, thus improve Stochastic accessing performance.
For ease of better implementing the technical scheme of the embodiment of the present invention, also provide one below for implementing the relevant apparatus of said method embodiment.
There is provided a kind of wireless access network element 400 see Fig. 4, the embodiment of the present invention, can comprise: receiver module 410, antenna compensating module 420 and Stochastic accessing Executive Module 450, and the first correction verification module 430, and/or the second correction verification module 440.
Wherein, receiver module 410, for receiving the access request from UE by antenna;
Antenna compensating module 420, carries out antenna compensation calculation for the access request received receiver module 410, obtains the access request after antenna compensation;
Under a kind of application scenarios, antenna compensating module 420 can comprise: path search submodule, channel fading factor computing module and compensation submodule (not shown in Fig. 4)
Path search submodule, the described access request for receiving according to receiver module 410 performs access channel path search and obtains footpath information;
Channel fading factor computing module, calculates the channel fading factor for utilizing the signature sequence in described footpath information, described access request and known signature sequence;
Compensating submodule, for carrying out antenna compensation calculation according to this footpath information and the channel fading factor pair access request calculated, obtaining the access request after antenna compensation.
First correction verification module 430, carries out the first verification for the access request after compensating antenna compensating module 420 antenna;
Second correction verification module 440, obtains the access request after compensate of frequency deviation for carrying out compensate of frequency deviation to the data division of the access request after the compensation of antenna compensating module 420 antenna, and carries out the second verification to the access request after described compensate of frequency deviation;
Stochastic accessing Executive Module 450 for perform at the first correction verification module 430 first verification correct time, perform the Stochastic accessing of UE based on the access request after antenna compensating module 420 antenna compensates; Or, the second correction verification module 440 perform the second verification correct time, perform the Stochastic accessing of this UE based on the access request after compensate of frequency deviation.
In actual applications, receiver module 410, antenna compensating module 420, first correction verification module 430, second correction verification module 440 and Stochastic accessing Executive Module 450 such as can be deployed in the Base Band Unit BBU of wireless access network element 400.
Under a kind of application scenarios, wireless access network element 400 also can comprise:
Speed acquiring module, for after receiving the access request from UE, obtains the translational speed of this subscriber equipment;
Wherein, the first correction verification module 430 is used in translational speed that speed acquiring module obtains when being greater than default threshold speed, carries out the first verification to the access request after antenna compensates;
Second correction verification module 440 is used in translational speed that speed acquiring module obtains when being greater than default threshold speed, the data division of the access request after compensating this antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation.
Under a kind of application scenarios, the first correction verification module 430 is used in translational speed that speed acquiring module obtains when being greater than default threshold speed, carries out the first verification to the access request after antenna compensates;
Second correction verification module 440 is used in the first correction verification module 430 when performing the first check errors, the data division of the access request after compensating above-mentioned antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation.
Wherein, the first verification may be CRC or other existing verification mode; Second verification also may be CRC check or other existing verification mode.Be appreciated that verification mode can have multiple, above CRC check mode should not be understood as the exhaustive of verification mode as a concrete example, and therefore CRC check mode should not be construed as the restriction to embodiment of the present invention verification mode.
Be understandable that, the function of each functional module of wireless access network element 400 can according to the method specific implementation in said method embodiment, and its specific implementation process with reference to the associated description of said method embodiment, can repeat no more herein.
The embodiment of the present invention also provides a kind of mobile communication system, can comprise wireless access network element 400.
To sum up, in the embodiment of the present invention, wireless access network element is by carrying out antenna compensation calculation to the access request received, and obtains the access request after antenna compensation; First verification is carried out to the access request after this antenna compensates; And/or the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after this compensate of frequency deviation; If the first verification is correct, then the Stochastic accessing of the access request execution UE after compensating based on this antenna; If or the second verification is correct, the Stochastic accessing of UE is then performed based on the access request after this compensate of frequency deviation, achieve the choose reasonable of Stochastic accessing processing mode like this, make the processing mode of the Stochastic accessing selected more can be applicable to different application scenarioss, thus improve Stochastic accessing performance.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, above-mentioned program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The accidental access method provided the embodiment of the present invention above and wireless access network element and mobile communication system are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.
Claims (8)
1. an accidental access method, is characterized in that, comprising:
Receive the access request from user equipment (UE); Obtain the translational speed of described subscriber equipment;
Antenna compensation calculation is carried out to the described access request received, obtains the access request after antenna compensation;
If the translational speed of described subscriber equipment is greater than default threshold speed, then the first verification is carried out to the access request after described antenna compensation, the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after described compensate of frequency deviation;
If the first verification is correct, then perform the Stochastic accessing of described UE based on the access request after described antenna compensation; Or, if the second verification is correct, then perform the Stochastic accessing of described UE based on the access request after described compensate of frequency deviation.
2. method according to claim 1, is characterized in that, described method also comprises:
If the translational speed of described subscriber equipment is less than default threshold speed, then the access request after described antenna compensation is carried out to the step of the first verification; If the first check errors, then the data division performing the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the step of the second verification to the access request after described compensate of frequency deviation.
3. method according to claim 1, is characterized in that,
The described described access request to receiving carries out antenna compensation calculation, obtains the access request after antenna compensation, comprising:
Perform access channel path search according to the described access request received and obtain footpath information;
The signature sequence in described footpath information, described access request and known signature sequence is utilized to calculate the channel fading factor;
Carry out antenna compensation calculation according to described footpath information and access request described in the channel fading factor pair calculated, obtain the access request after antenna compensation.
4. the method according to any one of claims 1 to 3, is characterized in that,
Described first is verified as cyclic redundancy check (CRC);
Described second is verified as cyclic redundancy check (CRC).
5. a wireless access network element, is characterized in that, comprising:
Receiver module, for receiving the access request from user equipment (UE) by antenna;
Speed acquiring module, for after receiving the access request from UE, obtains the translational speed of described subscriber equipment;
Antenna compensating module, carries out antenna compensation calculation for the described access request received described receiver module, obtains the access request after antenna compensation;
First correction verification module, when the translational speed for obtaining in described speed acquiring module is greater than default threshold speed, carries out the first verification to the access request after described antenna compensates;
Second correction verification module, when translational speed for obtaining in described speed acquiring module is greater than default threshold speed, the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after described compensate of frequency deviation;
Stochastic accessing Executive Module, for when described first correction verification module execution first verification is correct, performs the Stochastic accessing of described UE based on the access request after described antenna compensation; Or, when described second correction verification module execution second verification is correct, perform the Stochastic accessing of described UE based on the access request after described compensate of frequency deviation.
6. wireless access network element according to claim 5, is characterized in that,
Described first correction verification module, when the translational speed for obtaining in described speed acquiring module is less than default threshold speed, carries out the first verification to the access request after described antenna compensates;
Described second correction verification module, for when described first correction verification module performs the first check errors, the data division of the access request after compensating described antenna carries out compensate of frequency deviation and obtains the access request after compensate of frequency deviation, and carries out the second verification to the access request after described compensate of frequency deviation.
7. the wireless access network element according to claim 5 or 6, is characterized in that,
Described antenna compensating module comprises:
Path search submodule, the described access request for receiving according to described receiver module performs access channel path search and obtains footpath information;
Channel fading factor computing module, calculates the channel fading factor for utilizing the signature sequence in described footpath information, described access request and known signature sequence;
Compensating submodule, for carrying out antenna compensation calculation according to described footpath information and access request described in the channel fading factor pair calculated, obtaining the access request after antenna compensation.
8. a mobile communication system, is characterized in that, comprising: the wireless access network element described in claim 5 to 7 any one.
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| CN201110121117.1A CN102170705B (en) | 2011-05-11 | 2011-05-11 | Random access method, wireless access network element and mobile communication system |
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| CN201110121117.1A CN102170705B (en) | 2011-05-11 | 2011-05-11 | Random access method, wireless access network element and mobile communication system |
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| CN102170705A CN102170705A (en) | 2011-08-31 |
| CN102170705B true CN102170705B (en) | 2015-03-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1756411A (en) * | 2004-09-29 | 2006-04-05 | 中兴通讯股份有限公司 | WCDMA system access channel frequency deviation estimating method |
| CN101511130A (en) * | 2009-02-25 | 2009-08-19 | 中兴通讯股份有限公司 | Method and system for obtaining frequency bias in high speed shrouding scene |
| CN101675698A (en) * | 2007-03-01 | 2010-03-17 | 株式会社Ntt都科摩 | Base station device and communication control method |
| CN101753171A (en) * | 2008-12-16 | 2010-06-23 | 中兴通讯股份有限公司 | Method for carrying out estimation and compensation on frequency offset in mobile communication |
| CN101841347A (en) * | 2009-03-16 | 2010-09-22 | 鼎桥通信技术有限公司 | Method and device for estimating frequency offset |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756411A (en) * | 2004-09-29 | 2006-04-05 | 中兴通讯股份有限公司 | WCDMA system access channel frequency deviation estimating method |
| CN101675698A (en) * | 2007-03-01 | 2010-03-17 | 株式会社Ntt都科摩 | Base station device and communication control method |
| CN101753171A (en) * | 2008-12-16 | 2010-06-23 | 中兴通讯股份有限公司 | Method for carrying out estimation and compensation on frequency offset in mobile communication |
| CN101511130A (en) * | 2009-02-25 | 2009-08-19 | 中兴通讯股份有限公司 | Method and system for obtaining frequency bias in high speed shrouding scene |
| CN101841347A (en) * | 2009-03-16 | 2010-09-22 | 鼎桥通信技术有限公司 | Method and device for estimating frequency offset |
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