CN101400144A - Method, system and device for initial ranging - Google Patents
Method, system and device for initial ranging Download PDFInfo
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- CN101400144A CN101400144A CNA2007101615677A CN200710161567A CN101400144A CN 101400144 A CN101400144 A CN 101400144A CN A2007101615677 A CNA2007101615677 A CN A2007101615677A CN 200710161567 A CN200710161567 A CN 200710161567A CN 101400144 A CN101400144 A CN 101400144A
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Abstract
The invention provides a method of initial range measuring, a system and a device, comprising that: a base station (BS) transmits CDMA distribution information including a first special resource information to MS after receiving range measuring codes transmitted at range measuring access moment by mobile terminals (MS); if BS fails in range measuring request decode or does not have enough resource to distribute to MS for next information transmission, informs MS to transmit the range measuring request again after receiving the range measuring request transmitted by MS, thereby reducing delay in random access process. The invention also provides a method of initial range measuring, a system and a device. BS acquires the first special resource information for transmitting the range measuring request after successfully receiving the range measuring codes transmitted through range measuring competition channels, according to the first special resource information, generates power adjustment information aiming at the first special resource information, and transmits the power adjustment information to MS, thereby increasing reliability of transmitting the range measuring request.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of method of initial ranging, system and equipment.
Background technology
In mobile communication, if portable terminal (MS) need establish a communications link with base station (BS), must at first communicate the application of channel, the mode that inserts is at random adopted in the application of this communication channel usually.
The accidental access method that adopts is based on random access collision (ALOHA) mode of catching the indication time slot fast that has at present, wherein, the initiating ranging process in the random access procedure is to be used for MS to obtain system's initial uplink synchronously and the process of the needed upstream bandwidth of transfer of data.Fig. 1 is the method flow diagram of the initial ranging of available technology adopting, and as shown in Figure 1, initiating ranging process of the prior art mainly may further comprise the steps:
Step 101:MS inserts constantly in range finding and sends ranging code to BS.
In this step, it is the moment that the predefined MS of being exclusively used in finds range that range finding inserts constantly, and MS has only the arrival of waiting for this moment to send ranging code to BS.
The channel that MS sends ranging code is the range finding competitive channel.
Step 102:BS judges whether that success receives ranging code, if successfully receive ranging code, then execution in step 103, if successfully do not receive ranging code, then execution in step 108.
After step 103:BS successfully receives ranging code, to MS broadcasting ranging response (RNG-RSP).
In this step, after BS successfully receives ranging code, carry out the calculating of time synchronized and aberrations in property according to ranging code, draw the adjustment amount of time, frequency and power that the MS that sends this ranging code need carry out, and with this adjustment amount and identify the successfully status indicator of (Success), be carried among the RNG-RSP.Wherein, power adjustment is the transmitting power adjustment amount that range finding competitive channel that MS uses need carry out.
Step 104:BS sends the dedicated resource information that is used to send distance measurement request (RNG-REQ) by CDMA assignment messages (CDMA_Allocation_IE) to MS.
After step 105:MS receives the RNG-RSP that comprises the Success status indicator, utilize the dedicated resource information that comprises among the CDMA_Allocation_IE, on this private resource, send RNG-REQ to BS.
Step 106:BS decodes to the RNG-REQ that receives, the success and have sufficient resources to distribute to MS of judging whether to decode, execution in step 107; If decoding is unsuccessful or do not have sufficient resources to distribute to MS, execution in step 108 or do not do any operation then.
Step 107:BS sends the RNG-RSP that comprises the Success status indicator and comprise basic connection identifier (CID (Basic CID), process ends to MS.
After this step, after MS receives this RNG-RSP, just finish initiating ranging process, can continue to carry out the subsequent message process of transmitting.
Step 108:BS sends the RNG-RSP that carries continuation (Continue) or interrupt (Abort) status indicator to MS.
After step 109:MS receives the RNG-RSP that comprises Continue or Abort status indicator, wait for that next range finding inserts constantly, continue execution in step 101 then, restart to send test patterns, repeat said process, until receiving the RNG-RSP that comprises the Success status indicator, process ends.
By above process as can be seen, in the prior art in the method for initial ranging, after BS receives RNG-REQ, the RNG-REQ that receives is decoded, the success or do not have enough resources to distribute if do not decode, then comprise the RNG-RSP of Continue or Abort status indicator, or do not do any operation to the MS transmission.If send the RNG-RSP that comprises Continue or Abort status indicator to MS, then MS need wait for that next range finding access re-executes complete initial ranging flow process constantly; If BS does not carry out any operation, then MS can at the timing T that sets in advance then wait for that next range finding access constantly re-executes complete initial ranging flow process, and wherein, the timing T that sets in advance is generally 50ms.So if BS not to RNG-REQ decoding success or there are not enough resources can divide timing, needs to resend ranging code, the initial ranging flow process of complete can cause very big access delay.
In addition, in the prior art, after BS successfully receives ranging code, what carry in the RNG-RSP that MS sends is the power adjustment that need carry out at the range finding competitive channel that MS uses, and after MS receives RNG-RSP and CDMA_Allocation_IE, the RNG-REQ that sends to BS sends on private resource, usually the power of the channel of private resource is also inequality with the power of range finding competitive channel, so, after MS utilizes power adjustment that BS sends that self power is adjusted, use private resource to send RNG-REQ and improper, can make that the reliability that sends the RNG-REQ success is lower.
Summary of the invention
The embodiment of the invention provides a kind of method, system and equipment of initial ranging, so that reduce the access delay in the initial ranging.
The embodiment of the invention also provides a kind of method, system and equipment of initial ranging, so that improve the reliability that sends RNG-REQ in the initial ranging.
A kind of method of initial ranging, this method comprises:
Base station BS successfully receives mobile terminal MS behind the ranging code that the range finding access sends constantly, sends the CDMA assignment messages CDMA_Allocation_IE that comprises first dedicated resource information to this MS;
After BS receives the distance measurement request RNG-REQ that MS sends, if to described RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS.
A kind of method of initial ranging, this method comprises:
MS inserts constantly in range finding and sends ranging code to BS;
MS receives the CDMA_Allocation_IE that comprises first dedicated resource information, utilizes this first private resource to send RNG-REQ;
If receive the notice that resends RNG-REQ, then send RNG-REQ to described BS again.
A kind of system of initial ranging, this system comprises:
BS is used for success and receives MS behind the ranging code that the range finding access sends constantly, sends the CDMA_Allocation_IE that comprises first dedicated resource information to described MS; After receiving the distance measurement request RNG-REQ that MS sends, if to described RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS;
MS is used for inserting constantly to described BS transmission ranging code in range finding; Reception comprises the CDMA_Allocation_IE of first dedicated resource information, utilizes this first private resource to send RNG-REQ; If receive the notice that resends RNG-REQ, then send RNG-REQ to described BS again.
A kind of BS, this BS comprises:
Receiving element is used to receive MS and inserts the ranging code that sends constantly in range finding, receives the RNG-REQ that MS sends;
The assignment messages generation unit is used for after described receiving element successfully receives described ranging code, generates the CDMA_Allocation_IE that comprises first dedicated resource information;
Decoding unit is used for the RNG-REQ that described receiving element receives is decoded;
Notification unit is used for generating the notice that MS resends RNG-REQ not having enough resource allocations to be used for to MS that subsequent message sends or described decoding unit during to described RNG-REQ decoding failure;
Transmitting element is used to send the CDMA_Allocation_IE that described assignment messages generation unit generates, and the MS that sends described notification unit generation resends the notice of RNG-REQ.
A kind of MS, this MS comprises:
Transmitting element is used for constantly sending ranging code in the range finding access, according to first dedicated resource information, sends RNG-REQ on described first private resource;
Receiving element receives the CDMA_Allocation_IE that comprises first dedicated resource information, and described first dedicated resource information is offered described transmitting element, receives the notice that resends RNG-REQ;
Notification unit is used to obtain the described notice that described receiving element receives, and according to described notice, the notice transmitting element resends RNG-REQ.
A kind of method of initial ranging, this method comprises:
After BS successfully receives the ranging code of MS by the transmission of range finding competitive channel, obtain first dedicated resource information that MS is used to send RNG-REQ, according to described first dedicated resource information, generation is at the power adjustment information of described first dedicated resource information, and described power adjustment information is sent to MS.
A kind of system of initial ranging, this system comprises:
BS, be used for behind the ranging code that successfully receives the MS transmission, obtaining first dedicated resource information that MS is used to send RNG-REQ, according to this first dedicated resource information, generation is at the power adjustment information of this first dedicated resource information, and this power adjustment information is sent to MS;
MS is used for sending ranging code by the range finding competitive channel to described BS, receives the power adjustment information that described BS sends, and carries out the adjustment of self transmitting power according to described power adjustment information.
A kind of BS, this BS comprises:
Receiving element is used to receive the ranging code that MS sends;
The resource information acquiring unit is used for after described receiving element successfully receives ranging code, obtains first dedicated resource information that MS is used to send RNG-REQ;
First information generation unit is used for first dedicated resource information obtained according to described resource information acquiring unit, generates the power adjustment information at described first dedicated resource information;
Transmitting element is used for the power adjustment information at first dedicated resource information that described first information generation unit generates is sent to MS.
As can be seen from the above technical solutions, in the method that the embodiment of the invention provides, system and the equipment, BS successfully receives mobile terminal MS behind the ranging code that the range finding access sends constantly, sends the CDMA assignment messages CDMA_Allocation_IE that comprises first dedicated resource information to this MS; After BS receives the distance measurement request RNG-REQ that MS sends, if to this RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS.Like this can be so that when the BS decoding is failed or do not have enough resource allocations to give MS, MS does not need to insert constantly in next one range finding again to send ranging code to BS, promptly do not need to re-execute the flow process of initial ranging, get final product but notice MS resends RNG-REQ, reduced the time delay of random access procedure.And, because need not to insert the competitive channel of use range finding constantly in range finding, MS sends ranging code, also saved range finding competitive channel resource.
The embodiment of the invention also provides a kind of method, system and equipment of initial ranging, after BS successfully receives the ranging code of MS by the transmission of range finding competitive channel, obtain first dedicated resource information that MS is used to send RNG-REQ, according to this first dedicated resource information, generation is at the power adjustment information of this first dedicated resource information, and this power adjustment information is sent to MS.Make MS can utilize this power adjustment information at dedicated resource information to carry out self transmitting power adjustment, adjusted transmitting power is adapted at sending RNG-REQ on the private resource, has improved the reliability that sends RNG-REQ.
Description of drawings
Fig. 1 is the method flow diagram of the initial ranging of available technology adopting;
The first method flow chart of the initial ranging that Fig. 2 provides for the embodiment of the invention;
The second method flow chart of the initial ranging that Fig. 3 provides for the embodiment of the invention;
The method flow diagram that the MS that Fig. 4 provides for the embodiment of the invention holds;
The system construction drawing of first kind of initial ranging that Fig. 5 provides for the embodiment of the invention;
The system construction drawing of second kind of initial ranging that Fig. 6 provides for the embodiment of the invention;
The third method flow diagram of the initial ranging that Fig. 7 provides for the embodiment of the invention;
The system construction drawing of the third initial ranging that Fig. 8 provides for the embodiment of the invention;
The system construction drawing of the 4th kind of initial ranging that Fig. 9 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The method that the embodiment of the invention provides is mainly: in initiating ranging process, after BS receives the RNG-REQ of MS transmission, if to this RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS.
Wherein, the method that BS notice MS resends RNG-REQ can adopt the mode of mixing automatic repeat requests (HARQ, Hybrid Automatic Repeat Request), also can adopt the mode that resends CDMA_Allocation_IE.Respectively this dual mode is described below.
The first method flow chart of the initial ranging that Fig. 2 provides for the embodiment of the invention in this embodiment, adopts the mode of HARQ.HARQ is the combination of automatic request retransmission (ARQ) and forward error correction coding (FEC), and ARQ is used to guarantee that the data communication on the wired network has higher transmission quality, when a current secondary data is attempted bust this, just requires to retransmit this data; FEC is used to guarantee under the wireless transmission environment, and to because the inhibition that the interference that the decline that interchannel noise, mobility bring and other MS bring is carried out increases extra bit in the data of transmission, both are combined has just produced HARQ.Adopt the mode of HARQ to realize initiating ranging process in the present embodiment, as shown in Figure 2, this method can may further comprise the steps:
Step 201:BS receives MS and inserts the ranging code that sends constantly in range finding.
In this step, it is the moment that the predefined MS of being specifically designed to finds range that range finding inserts constantly, and MS has only the arrival of waiting for this moment to send ranging code to BS.MS inserts in range finding and constantly selects a ranging slot at random, and selects a ranging code to send to BS at random.
In this step, have a plurality of MS and on range channel, send ranging code, because range channel is a public resource, so MS utilizes range channel transmission ranging code with competitive way.This ranging code is that MS selects from one group of specific binary system CDMA sign indicating number, and this ranging code can use two-way phase shift keying (BPSK, Binary Phase Shift Keying) modulation system to be modulated on the subcarrier of range channel.
After step 202:BS successfully receives ranging code, to MS broadcasting RNG-RSP.
In this step,, need discern, the ranging code that successfully identifies is called the ranging code that success receives these a plurality of ranging codes because BS may receive the ranging code that a plurality of MS send simultaneously.Be which MS sends owing to BS can not distinguish out the ranging code that receives again, so, need to comprise this ranging code information and Success status indicator, be carried at and be broadcast to MS among the RNG-RSP.Wherein, ranging code information can comprise: the time slot at the ranging code that receives, this ranging code place, and the subchannel at this ranging code place or other ranging code relevant information, each MS can judge whether this REG-RSP sends to self according to ranging code information.Can also carry the performance adjustment amount among this RNG-RSP.The performance adjustment amount can comprise: the adjustment amount that sends time, frequency and power that the MS of this ranging code need carry out.
Step 203:BS sends first dedicated resource information that is used to send RNG-REQ by CDMA_Allocation_IE to MS.
After this step, after MS receives the RNG-RSP and CDMA_Allocation_IE that comprises the Success status indicator, according to the performance adjustment amount among the RNG-RSP performance parameter of self is adjusted, according to the dedicated resource information that comprises among the CDMA_Allocation_IE, on this private resource, send RNG-REQ to BS.
After BS successfully receives ranging code, in above-mentioned steps 202 and the step 203, comprising the RNG-RSP of Success status indicator and send the dedicated resource information that is used to send RNG-REQ by CDMA_Allocation_IE to MS to MS broadcasting can be successively to take place, and also can be to take place simultaneously.
Step 204:BS decodes to the RNG-REQ that receives, the success and have sufficient resources to distribute to MS to be used for subsequent message and to send of judging whether to decode, and if not, then execution in step 205; If then execution in step 207.
The resource of distributing to MS described in this step is to be used for MS to send the resource of message to BS next time.
Step 205: send a negative response (NACK) indication to MS.
In HARQ, the mode that notice MS retransmits is to send NACK to MS.
After this step, MS receives the NACK indication, then utilizes the private resource of the last RNG-REQ of transmission to retransmit RNG-REQ to BS again.
Step 206:BS receives the RNG-REQ that MS retransmits, and carries out corresponding the processing according to different HARQ types, and goes to step 204.
HARQ can have three types, and in first type, MS comprises cyclic redundancy check (CRC) (CRC, Cyclical Redundancy Check) in the RNG-REQ that BS sends, and encodes with forward error correction (FEC, Forward Error Correction); The RNG-REQ coding that retransmits is with for the first time identical, and BS only need decode to the RNG-REQ that receives.In second type, MS first in the RNG-REQ that BS sends not or have a spot of redundancy, the RNG-REQ that retransmits not is original RNG-REQ, but increased redundancy section wherein, this moment, BS need merge the RNG-REQ that will retransmit and the previous RNG-REQ of buffer memory, decoded then.In the third type, the code word among the RNG-REQ of re-transmission has the self-demarking code ability, and at this moment, BS can directly decode from the RNG-REQ that retransmits, and also the RNG-REQ of re-transmission and the previous RNG-REQ of buffer memory can be merged the back decoding.
If in the process of circulation execution in step 204 to 206, all the time RNG-REQ can not successfully decode, then can set a frequency threshold value, before resending the step of RNG-REQ, notice MS also comprises: judge whether the number of times that MS resends RNG-REQ reaches preset threshold, when if the number of times that resends reaches the frequency threshold value of setting, do not reinform MS and retransmit, MS waits for timing T then, re-executes step 201 and sends ranging code with being at war with.Can also set a time threshold, when the time that distance notified MS to retransmit the last time reaches this time threshold, not reinform MS and retransmit, MS waits for and fixes time T then, re-executes step 201 and send ranging code with being at war with.
Step 207:BS sends a RNG-RSP who comprises Basic CID, process ends to MS.
After this step, after MS receives this RNG-RSP, just finish initiating ranging process, can continue to carry out following message transmitting process.
The second method flow chart of the initial ranging that Fig. 3 provides for the embodiment of the invention in this embodiment, adopts the mode that resends CDMA_Allocation_IE, and as shown in Figure 3, this method can may further comprise the steps:
Step 301 to step 302 with the step 201 described in Fig. 2 to 202.
Step 303:BS sends the dedicated resource information that is used to send RNG-REQ by CDMA_Allocation_IE to MS.
Step 304:BS decodes to the RNG-REQ that receives, and the success and have sufficient resources to distribute to MS of judging whether to decode is if then execution in step 305; If not, execution in step 303 then.
In this step, the success or do not have sufficient resources to distribute to MS if do not decode, then BS can resend a CDMA_Allocation_IE and give MS, wherein comprised the dedicated resource information that MS is used to send RNG-REQ, usually, dedicated resource information that resends and previous dedicated resource information are also inequality, after MS receives this CDMA_Allocation_IE, can send RNG-REQ to BS on new private resource.That is to say, repeated execution of steps 303 to 304, up to BS decoding success and there is sufficient resources to distribute to MS, perhaps, up to timing T then.
Step 305:BS sends a RNG-RSP who comprises Basic CID, process ends to MS.
The RNG-RSP that comprises Basic CID in this step can also comprise the Success status indicator.
In this step, BS can comprise the Success status indicator in the RNG-RSP that MS sends.After this step, after MS receives this RNG-RSP, just finished initiating ranging process, can continue to carry out following message transmitting process.
In above dual mode, because the present recommendation of general frame length in the 802.16e of Electrical and Electronic engineering association (IEEE) standard is 5ms, so, BS is when decoding gets nowhere or do not have enough resource allocations to be used for the message transmission to MS, and is more much smaller than timing T to the time sum that BS resends CDMA_Allocation_IE to MS transmission NACK and MS.
Said process is the corresponding operating of BS end when carrying out this method, and the method for carrying out at the MS end is: after MS receives the notice that resends RNG-REQ, again to BS transmission RNG-REQ.The method flow diagram that the MS that Fig. 4 provides for the embodiment of the invention holds, as shown in Figure 4, the operation that this MS carries out may further comprise the steps:
Step 401:MS inserts constantly in range finding and sends ranging code to BS.
Step 402:MS receives the CDMA_Allocation_IE that BS sends.
Step 403:, on this private resource, send RNG-REQ according to the dedicated resource information among this CDMA_Allocation_IE.
After this step 403, MS can be divided into following three steps arranged side by side according to the message difference that receives:
In this step,, then utilize the private resource of the last RNG-REQ of transmission to retransmit RNG-REQ again to BS if MS receives the NACK that BS sends.If MS receives the CDMA_Allocation_IE that BS sends, then utilize the private resource of the current CDMA_Allocation_IE indication that receives to send RNG-REQ.
Clear in order to describe, the above-mentioned dedicated resource information that sends for the first time by CDMA_Allocation_IE is called first dedicated resource information, and the dedicated resource information that the CDMA_Allocation_IE that is used to notify MS to retransmit carries is called second dedicated resource information.
First kind of system construction drawing of the initial ranging that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, this system can comprise: BS500 and MS510.
BS500 is used for success and receives MS510 behind the ranging code that the range finding access sends constantly, sends the CDMA_Allocation_IE that comprises first dedicated resource information to MS510; After receiving the distance measurement request RNG-REQ that MS510 sends, if to this RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send 510, then notify MS510 to resend RNG-REQ to MS.
MS510 is used for inserting constantly to BS500 transmission ranging code in range finding; Reception comprises the CDMA_Allocation_IE of first dedicated resource information, utilizes this first private resource to send RNG-REQ; If receive the notice that resends RNG-REQ, then send RNG-REQ to BS500 again.
Wherein, BS500 can comprise: receiving element 501, assignment messages generation unit 502, decoding unit 503, notification unit 504 and transmitting element 505.
Receiving element 501 is used to receive MS510 and inserts the ranging code that sends constantly in range finding, receives the RNG-REQ that MS510 sends.
Assignment messages generation unit 502 is used for obtaining first dedicated resource information after receiving element 501 successfully receives ranging code, generates the CDMA_Allocation_IE that comprises first dedicated resource information.
Decoding unit 503 is used for the RNG-REQ that receiving element 501 receives is decoded.
Transmitting element 505 is used to send the CDMA_Allocation_IE that assignment messages generation unit 502 generates, and the MS that sends notification unit 504 generations resends the notice of RNG-RNG.
Wherein, notification unit 504 can comprise:
Judging unit 5041 is used to judge whether that enough resource allocations are to the MS success that is used for that subsequent message sends or whether decoding unit 503 decodes;
According to BS MS is resend the advice method difference of notice, notification unit 504 can also have another structure, and as shown in Figure 6, this notification unit 504 can comprise: judging unit 6041, notice generation unit 6042.
Judging unit 6041 is used to judge whether that enough resource allocations are used for subsequent message to MS and send 510 or decoding unit 503 success of whether decoding.
Assignment messages generation unit 502 also is used for obtaining second resource information after the notice that regenerates message that receives notice generation unit 6042, generates the CDMA_Allocation_IE that comprises second resource information.
In addition, this BS500 can also comprise: retransmit number of times record cell 506, be used for the number of times that MS510 that recorder unit 501 receives resends RNG-REQ, when the number of times that resends RNG-REQ at MS510 reached preset threshold, notice notification unit 504 was not carried out and is generated the operation that MS resends the notice of RNG-RNG.
Composition to MS510 is described below, and this MS510 can comprise: transmitting element 511, receiving element 512 and notification unit 513.
Transmitting element 511 is used for constantly sending ranging code in the range finding access, according to first dedicated resource information, sends RNG-REQ on this first private resource.
Receiving element 512 receives the CDMA_Allocation_IE that comprises first dedicated resource information, and this first dedicated resource information is offered transmitting element 511, receives the notice that resends RNG-REQ;
Wherein, notification unit 513 can comprise: notice acquiring unit 5131 and notice resolution unit 5132.
Transmitting element 511, also be used for receive the notice resolution unit 5132 provide second dedicated resource information time, on this second private resource, resend RNG-REQ.
Receiving element 512 also is used to receive the RNG-RSP that comprises Basic CID that BS500 sends.
This MS510 also comprises: timing unit 514 is used for when transmitting element 511 sends RNG-REQ timing T being set.
Again the notification unit 515 of finding range is used for the timing T that is provided with at timing unit 514 then, and receiving element 512 provides range finding notice again to transmitting element 511 when not receiving the RNG-RSP that comprises Basic CID as yet.
Transmitting element 511 also is used for carrying out in range finding and inserting the operation that sends ranging code constantly when receiving the notice of range finding again of the notification unit 515 of finding range again.
The method that the embodiment of the invention provides is used for improving the initial ranging reliability mainly comprises: at initiating ranging process, BS successfully receives MS behind the ranging code that the range finding access sends constantly, obtain and be used for first dedicated resource information that MS sends RNG-REQ, generate power adjustment information according to this first dedicated resource information, and this power adjustment information is sent to MS at this first dedicated resource information.
The third method flow diagram of the initial ranging that Fig. 7 provides for the embodiment of the invention, as shown in Figure 7, this method can may further comprise the steps:
Step 701:BS receives the ranging code that MS sends by the range finding competitive channel.
This step is identical with the step 201 shown in Fig. 2, does not repeat them here.
After step 702:BS successfully receives ranging code, obtain first dedicated resource information that is used for MS transmission RNG-REQ.
Step 703:BS calculates the power adjustment information that MS carries out at this first dedicated resource information according to this MS that receives ranging code that sends and first dedicated resource information of obtaining.
Need to prove, after BS successfully receives ranging code, still can carry out in the prior art and carry the power adjustment information that need carry out at the range finding competitive channel at RNG-RSP, it calculates equally and carries out according to ranging code and range finding competitive channel resource information, is not described in detail at this.
BS can obtain the current transmission power information of MS according to the ranging code from MS that receives, can obtain the transmission power level of these first private resource needs according to first dedicated resource information of obtaining, transmission power level according to the current transmission power level of MS and the first private resource needs can calculate the power deviation amount that MS adjusts at these first private resource needs, generates power adjustment information at first dedicated resource information according to this power deviation amount.
The power adjustment information at this first dedicated resource information that BS generates can also be and deviate at the power adjustment of range finding competitive channel, or the needed transmission power level of first dedicated resource information.
The power adjustment information is according to the noise jamming rating calculation of described first private resource in this step.
Step 704:BS is carried at this power adjustment information and sends to MS among the CDMA_Allocation_IE.
In this step, can in original CDMA_Allocation_IE, increase respective field, in the field of this increase, carry the power adjustment information.The form of the CDMA_Allocation_IE that carries the power adjustment information that table 1 provides for the embodiment of the invention.As shown in table 1, the field that has increased by 3 bits in the present embodiment is used to carry the power adjustment information, for example, in the field shown in the table 1, can need not to carry out the adjustment of performance number with " 000 " sign, " 001 " sign needs MS that transmitting power is increased 6dB, and " 010 " sign needs MS that transmitting power is reduced 6dB etc.Certainly, this only is an object lesson of the embodiment of the invention, the particular content that does not limit concrete bit and identified.Except the deviate of power adjustment, also can utilize this field to carry at the first private resource desired power absolute value.In addition, can also adjust, also reserved field can be set the length of power adjustment information field.
Table 1
| Field | Length (bit) | Note |
| Duration | 6 | |
| Last between-line spacing is used sign indicating number (UIUC) | 4 | |
| The repeated encoding indication | 2 | The repeated encoding that indication is used |
| Frame index number | 4 | |
| Ranging code | 8 | |
| The range finding code element | 8 | |
| The range finding subchannel | 7 | |
| The bandwidth request agency | 1 | 1: comprise bandwidth request 0: do not comprise bandwidth request |
| The power adjustment information | 3 ? ? | 000: zero deflection; 001:+6dB; 010:-6dB; 011:+9dB; 100:+3dB; 101:-3dB; 110:-9dB; 111:-12dB; |
| Reserve | 5 |
After MS receives this CDMA_Allocation_IE,, the transmitting power of self is adjusted according to the power adjustment information that CDMA_Allocation_IE carries at first private resource.
In addition, carry the mode at the power adjustment information of first private resource, carry power adjustment information among the RNG-RSP that can also after BS successfully receives ranging code, send at first private resource except adopting CDMA_Allocation_IE.That is to say, in RNG-RSP, carry simultaneously at the power adjustment information of range finding competitive channel with at the power adjustment information of first private resource.After MS receives this RNG-RSP, at first according to carrying out the adjustment of transmitting power, then according to carrying out the adjustment of transmitting power at the power adjustment information of first private resource at the power adjustment information of range finding competitive channel.
Step 705: carry out later step according to existing procedure.
This method shown in Figure 7 also can be in conjunction with Fig. 2 or flow process shown in Figure 3, promptly can be after step 704, according to the flow performing after the step 203 among Fig. 2, or carry out according to the flow process after the step 303 among Fig. 3.
Second kind of structure chart of the initial ranging that Fig. 8 provides for the embodiment of the invention, as shown in Figure 8, this system can comprise: BS800 and MS810.
BS800, be used for behind the ranging code that successfully receives the MS810 transmission, obtaining first dedicated resource information that MS810 is used for RNG-REQ, according to this first dedicated resource information, generation is at the power adjustment information of this first dedicated resource information, and this power adjustment information is sent to MS810;
MS810 is used for sending ranging code by the range finding competitive channel to BS800, receives the power adjustment information that BS800 sends, and carries out the adjustment of self transmitting power according to this power adjustment information.
Wherein, BS800 can comprise: receiving element 801, resource information acquiring unit 802, first information generation unit 803 and transmitting element 804.
Receiving element 801 is used to receive the ranging code that MS810 sends.
Resource information acquiring unit 802 is used for after receiving element 801 successfully receives ranging code, obtains first dedicated resource information that MS810 is used to send RNG-REQ.
First information generation unit 803 is used for first dedicated resource information obtained according to resource information acquiring unit 802, generates the power adjustment information at this first dedicated resource information.
Transmitting element 804 is used for the power adjustment information at first dedicated resource information that first information generation unit 803 generates is sent to MS810.
BS can also comprise: range channel information generating unit 805, be used for after receiving element 801 successfully receives ranging code, and generate power adjustment information at the range finding competitive channel;
Transmitting element 804 also is used for the power adjustment information that range channel information generating unit 805 generates is sent to MS810.
Wherein, first information generation unit 803 comprises:
First carries unit 8032, is used for the power adjustment information at first dedicated resource information that first computing unit 8031 generates being carried at RNG-RSP or being carried among the CDMA_Allocation_IE.
First information generation unit 803 can also adopt another structure, and as shown in Figure 9, this first information generation unit 803 can comprise:
By above description as can be seen, in the method that the embodiment of the invention provides, system and the equipment, BS successfully receives mobile terminal MS behind the ranging code that the range finding access sends constantly, sends the CDMA assignment messages CDMA_Allocation_IE that comprises first dedicated resource information to this MS; After BS receives the distance measurement request RNG-REQ that MS sends, if to this RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS.Like this can be so that when MS is given in BS decoding failure or enough resource allocations of betraying one's friend, MS does not need to insert constantly in next one range finding again to send ranging code to BS, promptly do not need to re-execute the flow process of initial ranging, get final product but notice MS resends RNG-REQ, reduced the time delay of random access procedure.And, because need not to insert the competitive channel of use range finding constantly in range finding, MS sends ranging code, also saved range finding competitive channel resource.
The embodiment of the invention also provides a kind of method, system and equipment of initial ranging, after BS successfully receives the ranging code of MS by the transmission of range finding competitive channel, obtain first dedicated resource information that MS is used to send RNG-REQ, according to this first dedicated resource information, generation is at the power adjustment information of this first dedicated resource information, and this power adjustment information is sent to MS.Make MS can utilize this power adjustment information at dedicated resource information to carry out self transmitting power adjustment, adjusted transmitting power is adapted at sending RNG-REQ on the private resource, has improved the reliability that sends RNG-REQ.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (30)
1, a kind of method of initial ranging is characterized in that, this method comprises:
Base station BS successfully receives mobile terminal MS behind the ranging code that the range finding access sends constantly, sends the CDMA assignment messages CDMA_Allocation_IE that comprises first dedicated resource information to this MS;
After BS receives the distance measurement request RNG-REQ that MS sends, if to described RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS.
2, method according to claim 1, it is characterized in that, this method comprises: described notice MS resends RNG-REQ and comprises: described BS sends the automatic repeat requests HARQ that comprises negative response NACK indication to MS, perhaps, send the CDMA_Allocation_IE that comprises second dedicated resource information to described MS.
3, method according to claim 1, it is characterized in that, after described notice MS resends RNG-REQ, after re-executing described BS and receiving the RNG-REQ that MS sends, if to described RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend the step of RNG-REQ to MS.
4, method according to claim 2, it is characterized in that, also comprised resend the step of RNG-REQ at described notice MS before: described BS judges whether the number of times that described MS resends RNG-REQ reaches preset threshold, if reach preset threshold, then do not carry out the step that described notice MS resends RNG-REQ.
5, method according to claim 2, it is characterized in that, also comprised resend the step of RNG-REQ at described notice MS before: whether the time that described BS judging distance notified MS to resend RNG-REQ the last time reaches preset threshold, if reach preset threshold, then do not carry out the step that described notice MS resends RNG-REQ.
6, method according to claim 1 is characterized in that, if described BS is to RNG-REQ decoding success and have enough resource allocations to be used for subsequent message to MS to send, then send the RNG-RSP that comprises basic connection identifier (CID Basic CID to described MS.
7, a kind of method of initial ranging is characterized in that, this method comprises:
MS inserts constantly in range finding and sends ranging code to BS;
MS receives the CDMA_Allocation_IE that comprises first dedicated resource information, utilizes this first private resource to send RNG-REQ;
If receive the notice that resends RNG-REQ, then send RNG-REQ to described BS again.
8, method according to claim 7 is characterized in that, the notice of the described RNG-REQ of resending comprises: the HARQ that comprises negative response NACK indication;
Again sending RNG-REQ to described BS comprises: utilize described first dedicated resource information to send RNG-REQ to BS.
9, method according to claim 7 is characterized in that, the notice of the described RNG-REQ of resending comprises: the CDMA_Allocation_IE that comprises second dedicated resource information;
Again sending RNG-REQ to described BS comprises: utilize described second dedicated resource information to send RNG-REQ to BS.
10, method according to claim 7, it is characterized in that, again before sending RNG-REQ, described BS also comprising: judge whether the number of times that self resends RNG-REQ reaches preset threshold, if reach preset threshold, then insert and carry out described MS sends ranging code constantly to BS in the range finding access step constantly in next one range finding.
11, method according to claim 7, it is characterized in that, again also comprising before described BS sends RNG-REQ: whether the time interval that judging distance sent RNG-REQ last time reaches the timing of setting and does not receive the RNG-RSP that comprises Basic CID that described BS sends as yet, if reach timing and do not receive the RNG-RSP that comprises Basic CID that described BS sends as yet, then carry out described MS and insert the step that sends ranging code constantly to BS in range finding.
12, a kind of system of initial ranging is characterized in that, this system comprises:
BS is used for success and receives MS behind the ranging code that the range finding access sends constantly, sends the CDMA_Allocation_IE that comprises first dedicated resource information to described MS; After receiving the distance measurement request RNG-REQ that MS sends, if to described RNG-REQ decoding failure or do not have enough resource allocations to be used for subsequent message to send, then notify MS to resend RNG-REQ to MS;
MS is used for inserting constantly to described BS transmission ranging code in range finding; Reception comprises the CDMA_Allocation_IE of first dedicated resource information, utilizes this first private resource to send RNG-REQ; If receive the notice that resends RNG-REQ, then send RNG-REQ to described BS again.
13, a kind of BS is characterized in that, this BS comprises:
Receiving element is used to receive MS and inserts the ranging code that sends constantly in range finding, receives the RNG-REQ that MS sends;
The assignment messages generation unit is used for after described receiving element successfully receives described ranging code, generates the CDMA_Allocation_IE that comprises first dedicated resource information;
Decoding unit is used for the RNG-REQ that described receiving element receives is decoded;
Notification unit is used for generating the notice that MS resends RNG-REQ not having enough resource allocations to be used for to MS that subsequent message sends or described decoding unit during to described RNG-REQ decoding failure;
Transmitting element is used to send the CDMA_Allocation_IE that described assignment messages generation unit generates, and the MS that sends described notification unit generation resends the notice of RNG-REQ.
14, BS according to claim 13 is characterized in that, described notification unit comprises:
Judging unit is used to judge whether that enough resource allocations are to the MS success that is used for that subsequent message sends or whether described decoding unit decodes;
The HARQ generation unit is used for when described judgment unit judges does not have enough resource allocations to be used for subsequent message transmission or the failure of described decoding unit decodes to MS, and generation comprises the HARQ of negative response NACK indication as described notice.
15, BS according to claim 13 is characterized in that, described notification unit comprises:
Judging unit is used to judge whether that enough resource allocations are to the MS success that is used for that subsequent message sends or whether described decoding unit decodes;
The notice generation unit is used for sending the notice that regenerates message to described assignment messages generation unit when described judgment unit judges does not have enough resource allocations to be used for subsequent message transmission or the failure of described decoding unit decodes to MS;
Described assignment messages generation unit also is used for after receiving the notice that regenerates message of described notice generation unit, generates the CDMA_Allocation_IE that comprises second resource information.
16, BS according to claim 13, it is characterized in that, this BS also comprises: retransmit the number of times record cell, be used to write down the number of times that described MS that described receiving element receives resends RNG-REQ, when the number of times that resends RNG-REQ at described MS reaches preset threshold, notify described notification unit not carry out the operation that described generation MS resends the notice of RNG-REQ.
17, a kind of MS is characterized in that, this MS comprises:
Transmitting element is used for constantly sending ranging code in the range finding access, according to first dedicated resource information, sends RNG-REQ on described first private resource;
Receiving element receives the CDMA_Allocation_IE that comprises first dedicated resource information, and described first dedicated resource information is offered described transmitting element, receives the notice that resends RNG-REQ;
Notification unit is used to obtain the described notice that described receiving element receives, and according to described notice, the notice transmitting element resends RNG-REQ.
18, MS according to claim 17 is characterized in that, described notification unit comprises:
The notice acquiring unit is used to obtain the notice that described receiving element receives;
The notice resolution unit, being used in the notice that described notice acquiring unit obtains is when comprising the HARQ of negative response NACK indication, to notify described transmitting element to resend RNG-REQ on first private resource; The notice of obtaining at described notice acquiring unit is when comprising the CDMA_Allocation_IE of second dedicated resource information, and described second dedicated resource information is offered described transmitting element;
Described transmitting element also is used for resending RNG-REQ on described second private resource when receiving second dedicated resource information that described notice resolution unit provides.
According to claim 17 or 18 described MS, it is characterized in that 19, described receiving element also is used to receive the RNG-RSP that comprises Basic CID that described BS sends;
This MS also comprises: timing unit is used for when described transmitting element sends RNG-REQ timing T being set;
Again the notification unit of finding range is used for the timing T that is provided with at described timing unit then, and described receiving element provides range finding notice again to described transmitting element when not receiving the RNG-RSP of the described Basic of comprising CID as yet;
Described transmitting element also is used for when receiving the notice of range finding again of the described notification unit of finding range again, carries out the described operation that sends ranging code constantly that inserts in range finding.
20, a kind of method of initial ranging is characterized in that, this method comprises:
After BS successfully receives the ranging code of MS by the transmission of range finding competitive channel, obtain first dedicated resource information that MS is used to send RNG-REQ, according to described first dedicated resource information, generation is at the power adjustment information of described first dedicated resource information, and described power adjustment information is sent to MS.
21, method according to claim 20, it is characterized in that, this method also comprises: after described BS successfully receives described ranging code, generate the power adjustment information at the range finding competitive channel, and described power adjustment information is carried at sends to MS among the RNG-RSP.
22, method according to claim 20, it is characterized in that, described generation comprises at the power adjustment information of first dedicated resource information: determine the transmission power level of the described first private resource needs according to first dedicated resource information of obtaining, and generate described power adjustment information at first dedicated resource information according to described transmission power level; Perhaps,
Described BS determines the transmission power level that MS is current according to the ranging code that receives, and determines the transmission power level of the described first private resource needs according to first dedicated resource information of obtaining; According to the current transmission power level of described MS and the transmission power level of the described first private resource needs, calculate the power deviation amount that MS need adjust at this first private resource, generate described power adjustment information at first dedicated resource information according to described power deviation amount.
23, method according to claim 21, it is characterized in that, described generation comprises at the power adjustment information of this first dedicated resource information: utilize first dedicated resource information of obtaining to determine the transmission power level of the described first private resource needs, and the departure of the transmission power level that calculates the described first private resource needs according to the power adjustment information at the range finding competitive channel of described generation and the transmission power level of range finding competitive channel needs, and generate described power adjustment information at first dedicated resource information according to this departure.
24, method according to claim 20 is characterized in that, describedly the power adjustment information is sent to MS comprises: described power adjustment information is carried among the RNG-RSP that comprises at the power adjustment information of range finding competitive channel, sends to MS; Perhaps,
Described power adjustment information is carried at sends to MS among the CDMA_Allocation_IE.
25, method according to claim 24, it is characterized in that, described power adjustment information is carried among the CDMA_Allocation_IE comprises: in described CDMA_Allocation_IE, increase field, in the field of described increase, carry described power adjustment information.
26, a kind of system of initial ranging is characterized in that, this system comprises:
BS, be used for behind the ranging code that successfully receives the MS transmission, obtaining first dedicated resource information that MS is used to send RNG-REQ, according to this first dedicated resource information, generation is at the power adjustment information of this first dedicated resource information, and this power adjustment information is sent to MS;
MS is used for sending ranging code by the range finding competitive channel to described BS, receives the power adjustment information that described BS sends, and carries out the adjustment of self transmitting power according to described power adjustment information.
27, a kind of BS is characterized in that, this BS comprises:
Receiving element is used to receive the ranging code that MS sends;
The resource information acquiring unit is used for after described receiving element successfully receives ranging code, obtains first dedicated resource information that MS is used to send RNG-REQ;
First information generation unit is used for first dedicated resource information obtained according to described resource information acquiring unit, generates the power adjustment information at described first dedicated resource information;
Transmitting element is used for the power adjustment information at first dedicated resource information that described first information generation unit generates is sent to MS.
28, BS according to claim 27 is characterized in that, described BS also comprises: the range channel information generating unit, be used for after described receiving element successfully receives described ranging code, and generate power adjustment information at the range finding competitive channel;
Described transmitting element also is used for the power adjustment information that described range channel information generating unit generates is sent to MS.
29, BS according to claim 27 is characterized in that, described first information generation unit comprises:
First computing unit is used for determining according to described first dedicated resource information transmission power level of the described first private resource needs, and generates described power adjustment information at first dedicated resource information according to described transmission power level; Perhaps, the ranging code that utilizes described receiving element to receive is determined the transmission power level that MS is current, first dedicated resource information that utilization is obtained is determined the transmission power level that described first private resource needs, according to the current transmission power level of described MS and the transmission power level of the described first private resource needs, calculate the power deviation amount that MS need adjust at this first private resource, generate described power adjustment information at first dedicated resource information according to described power deviation amount;
First carries the unit, is used for the power adjustment information at first dedicated resource information that described first computing unit generates being carried at RNG-RSP or being carried among the CDMA_Allocation_IE.
30, BS according to claim 28 is characterized in that, described first information generation unit comprises:
Second computing unit, be used to utilize described first dedicated resource information to determine the transmission power level of the described first private resource needs, and generate according to described range channel information generating unit, calculate the departure of transmission power level with the transmission power level of range finding competitive channel needs of these first private resource needs at the power adjustment information of range finding competitive channel, and generate described power adjustment information at first dedicated resource information according to this departure;
Second carries the unit, is used for the power adjustment information at first dedicated resource information that described second computing unit generates being carried at RNG-RSP or being carried among the CDMA_Allocation_IE.
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|---|---|---|---|
| CNA2007101615677A CN101400144A (en) | 2007-09-29 | 2007-09-29 | Method, system and device for initial ranging |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101615677A CN101400144A (en) | 2007-09-29 | 2007-09-29 | Method, system and device for initial ranging |
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| CNA2007101615677A Pending CN101400144A (en) | 2007-09-29 | 2007-09-29 | Method, system and device for initial ranging |
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| CN102067502A (en) * | 2008-06-20 | 2011-05-18 | 高通股份有限公司 | Methods and systems for fast ranging in wireless communication networks |
| CN102263624A (en) * | 2010-05-23 | 2011-11-30 | 三星电子株式会社 | Apparatus and method for providing HARQ for ranging in a wireless communication system |
| CN102299782A (en) * | 2010-06-24 | 2011-12-28 | 中兴通讯股份有限公司 | Method, terminal and control station for processing network access |
| CN102388546A (en) * | 2009-04-08 | 2012-03-21 | Lg电子株式会社 | Method for transmitting and receiving acknowledgment in a wireless communication system |
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| CN102067502A (en) * | 2008-06-20 | 2011-05-18 | 高通股份有限公司 | Methods and systems for fast ranging in wireless communication networks |
| US8873459B2 (en) | 2008-09-04 | 2014-10-28 | Lg Electronics Inc. | Method of random access in a wireless system |
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| CN102388546A (en) * | 2009-04-08 | 2012-03-21 | Lg电子株式会社 | Method for transmitting and receiving acknowledgment in a wireless communication system |
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| CN102263624A (en) * | 2010-05-23 | 2011-11-30 | 三星电子株式会社 | Apparatus and method for providing HARQ for ranging in a wireless communication system |
| EP2388946A3 (en) * | 2010-05-23 | 2017-04-05 | Samsung Electronics Co., Ltd. | Apparatus and method for providing HARQ for ranging in a wireless communication system |
| CN108183772A (en) * | 2010-05-23 | 2018-06-19 | 三星电子株式会社 | For the device and method of the mixed automatic repeat request of ranging in wireless communication |
| CN102299782A (en) * | 2010-06-24 | 2011-12-28 | 中兴通讯股份有限公司 | Method, terminal and control station for processing network access |
| CN103155658A (en) * | 2010-10-12 | 2013-06-12 | 英特尔公司 | Methods for an uplink power control mechanism |
| CN102811449A (en) * | 2011-05-30 | 2012-12-05 | 中兴通讯股份有限公司 | Method and device for improving communication quality |
| CN113167879A (en) * | 2018-12-05 | 2021-07-23 | 三星电子株式会社 | Optimized transmission for single/double-sided two-way ranging in multiple devices |
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