CN101500266B - Stochastic signature sequence allocation method in enhanced FACH base on multiple frequency points - Google Patents
Stochastic signature sequence allocation method in enhanced FACH base on multiple frequency points Download PDFInfo
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Abstract
The invention discloses a random signature sequence allocation method based on multi-frequency-point in an enhanced FACH, which realizes flexible allocation to enhanced FACH (E-FACH) access so as to achieve the purposes of distinguishing access level and service QoS, transferring service information of users and the like. The technical proposal is as follows: the method comprises the steps: a terminal sends signature sequences of PRACH message access and E-RUCCH message access at a master frequency point of a cell, and sends a signature sequence of the enhanced FACH access at an auxiliary frequency point of the cell so as to lead a network to judge whether the access is the enhanced FACH access according to the information of the frequency points of the received signature sequences; and the information of the frequency points is broadcasted in a system message of a service cell, the network responses to signature on the master frequency point of the cell or a frequency point required by the system by virtue of the FPACH towards the access initiated by the terminal, and the information of the frequency point of the FPACH is broadcasted in the system message. The method is applied to the field of mobile communication.
Description
Technical field
The present invention relates to the group technology of wireless communication system terminal enhanced random access signature sequence, relate in particular at 3G (3
RdGeneration) method of stochastic signature sequence grouping during fast access into network under E-FACH (enhancement mode CELL_FACH) state in the system.
Background technology
TD-SCDMA (TD SDMA, Time Division-Synchronous CodeDivision Multiple Access) is one of 3G (Third Generation) Moblie standard.
The most valuable in the mobile communication system is exactly limited frequency spectrum resources, because TD-SCDMA supports the asymmetric business of up-downgoing speed to make that the availability of frequency spectrum can be very high.TD-SCDMA system synthesis has been utilized code division multiple access (CDMA), time division multiple access (TDMA) and frequency division multiple access (FDMA), simultaneously integrated intelligent antenna technology, between baton handover technology between direct-cut operation and the soft handover and the feasibility that can in the portable terminal receiver, use multiuser detection, make this 3G scheme have many remarkable advantages.
The TD-SCDMA system can identical networking or inter-frequency networking, and during inter-frequency networking, the multiple access of a plurality of minizones mainly relies on frequency division multiple access to realize; When adopting identical networking, the multiple access of minizone relies on spreading code-Walsh sign indicating number and cell scrambling to finish jointly.
During identical networking, near the common boundary of a plurality of sub-districts (such as 2 or 3 sub-districts), portable terminal can receive many interference from this sub-district and other sub-district, and the interference of this sub-district can fully utilize when the joint-detection of receiver, can not bring too much influence to receptivity; And from other sub-district (mainly being adjacent sub-district) if interference do not offset or the performance of joint-detection receiver will have very big loss even failure, cause power system capacity and handover success rate to reduce largely.
TD-SCDMA system synthesis has adopted advanced technologies such as joint-detection, smart antenna and uplink synchronous, intrasystem multiple access and multipath disturb and have obtained very big minimizing, thereby improved the availability of frequency spectrum effectively, and then improved the capacity of whole system, but owing on broadcast channel, do not carry out beam shaping, lacked the excipient gain that beam shaping brings, so coverage is less relatively; Under the situation of identical networking, because the broadcast channel theaomni-directional transmission, the interference of intercarrier broadcast channel is also very serious, has also caused the reduction of system effectiveness in addition.For a flexible configuration frequency resource and a sign indicating number resource, and the power system capacity that improves hot zones covers, and introduced the characteristic of N frequency in the TD-SCDMA system.Be a plurality of carrier frequency of each cell configuration, wherein, carrying P-CCPCH's is main carrier frequency, and the carrier frequency that does not carry P-CCPCH is an assistant carrier frequency.A N frequency point cell can dispose a main carrier frequency, a N-1 assistant carrier frequency.
According to the description in the rower, support the sub-district key property of N frequency to comprise: there is and only has a main carrier frequency each sub-district; Major-minor carrier frequency uses identical scrambler and basic Midamble sign indicating number; The shared uplink and downlink timeslot of same UE is configured on the same frequency; The time slot transfer point proposed arrangement of main carrier frequency and assistant carrier frequency is identical; Only send DwPTS and TS0 information on main carrier frequency, the TSO of assistant carrier frequency does not use.
For the N frequency point cell, all common signal channels all are disposed at main carrier frequency, and assistant carrier frequency is configuration service channel and configuration section common signal channel conditionally only.
Finish whole service and call out, signaling is set up process and generally comprised following key step in the TD-SCDMA system, and is for calling terminal, as follows as shown in Figure 1:
RRC (wireless connection control, Radio Connection Control) connects the process of setting up;
NAS (Non-Access Stratum) signaling connects to be set up and the NAS signalling interactive process;
RAB (RAB) sets up process;
The transmission of traffic signaling.
The signaling procedure and the caller of called end call setup are similar, but many pagings.
The physical accidental access procedure can carry out simply as follows.
(1.UE user terminal) side
(1) retransmission counter of signature (for inserting 8 SYNC-UL sign indicating numbers distributing to UpPTS at random) is set.
(2) the signature transmitting power being set is Signature_Initial_Power.
(3) in available UpPCH subchannel and signature sequence, select a pair of at random according to given access service grade (ASC, Access Service Class).Used random function must satisfy each and select selected probability identical.
(4) with selected UpPCH subchannel, with stochastic signature of signature transmitting power emission.
(5) listen to relevant FPACH behind the emission signature, from subsequently WT (network is to a maximum that sends the number of subframes that signature confirmed) subframe, obtain network validation.UE will read the FPACH relevant with launching UpPCH from the subframe that satisfies following relationship
i: (SFN ' mod L
i)=n
RACHin
RACHi=0 ..., N
RACHi-1, wherein FPACHi is that channel number is the FPACH of i, L
iBe the length of RACH transmission block, n
RACHiBe some PRACH channel numbers of i FPACH correspondence, N
RACHiThe PRACH sum of representing i FPACH correspondence.
(6) if do not detect effective response within the scheduled time, the signature retransmission counter subtracts 1.If counter, then turned back to for (3) step still greater than 0; Otherwise report once access failure at random to media access control sublayer.
(7) if detect effective response within the scheduled time, then:
1. according to FPACH
iThe indication that network receives is provided with time and power level value.
2. after the subframe of carrying Signature Confirmation, two subframes of being separated by send RACH message on relevant PRACH.If L
iGreater than 1, and the subframe numbers of confirming is odd number, and UE need wait for a subframe again.If following equation is set up, relevant PRACH is exactly and FPACH
iRelated n
RACHiIndividual PRACH:
(SFN ' mod L
i)=n
RACHi, SFN ' is a subframe numbers of confirming arrival here.
Transmitted power level on UpPCH and the PRACH all can not surpass the numerical value of network by the signaling indication.
2. network side
Base station (Node B) is the emission FPACH relevant with UpPCH in satisfying the frame of following relationship only
i: (SFN ' mod L
i)=n
RACHin
RACHi=0 ..., N
RACHi-1
Node B can not confirm the UpPCH of the preceding emission of WT subframe.
After one effectively signature receives,, and on relevant FPACH, send the detected signature of FPACH burst affirmation from UpPCH the measurements time deviation of reference time Tref in first footpath of receiving that connects.
If insert at random successfully, terminal goes up transmission RRC at PRACH (Physical Random Access Channel) and sets up request message, and application is set up RRC and connected.
Also there is the E-RUCCH process in TD-SCDMA system for supporting HSUPA, and it mainly finishes the access procedure of HSUPA.It is not the PRACH channel that the access procedure of E-RUCCH and above-mentioned conventional access procedure basically identical, this process that different is are used to send the channel that RRC sets up request message, but the E-RUCCH channel.In order to distinguish this two kinds of access procedures, prior protocols is represented them with different signature sequences.With the sub-district can with 8 SYNC_UL sign indicating numbers be divided into two groups, one group is used for representing that RACH message inserts, another group expression E-RUCCH message inserts, and they are broadcasted in system message.
There is class Always Online (always online) business in the business in various TD-SCDMA system, this class business features is the business of small data packets frequent transmission between user terminal and the network, for example PoC (touch-call, Push over Celluar), Push Email (e-mail push) and monthly payment user's demand, their common feature is quite long quiet period is arranged but to require to wake up fast when having data to pass.To some business especially PoC, the connection setup time that customer requirements is shorter.Terminal generally is maintained at the CELL_FACH state and connects to avoid frequent RRC.When upstream and downstream user face data arrive, network CELL_DCH (cell private channel, the Dedicated CHannel) state of generally these users being moved into has so just had the demand that CELL_FACH status signaling bit rate is strengthened, to improve the call re-establishment time delay, improve user experience.The target that CELL_FACH is strengthened is: the peak rate that improves the CELL_FACH state; Reduce CELL_FACH, user's face under the CELL_PCH state and chain of command time delay; Reduction is from CELL_FACH, and CELL_PCH is to the conversion time delay of CELL_DCH state; By using the power consumption that DRX reduces CELL_FACH state UE.
In order to guarantee the service quality of Always Online business, the TD-SCDMA system should be able to support to insert apace this business.Promptly under the CELL_FACH state, the descending FACH/S-CCPCH that do not re-use, and the relevant channel that uses high-speed packet to insert.
In the TD-SCDMA system, introduced the special uplink channel (E-DCH) of an enhancing, this channel can be regarded as the DCH that has used HARQ (fast physical layer retransmission) and fast dispatch.E-AGCH (absolute allocated channel) is used to be carried as the resource information of up E-DCH channel allocation.In the TD-SCDMA system, E-AGCH has carried the information of 23 or 26 bits, and these information comprise: absolute (power) apportioning cost, code resource information, time interval resource information, E-AGCH cyclic sequence number, the indication of resource continuous time, E-HICH indication and the indication of E-UCCH quantity.Because E-AGCH is a descending shared channel, in order to indicate that the information on this channel is the terminal object that transmits, thus need be with user ID (UE-ID) mask on check code of terminal, judge that by mobile phone whether configuration on the E-AGCH is at oneself.UE-ID is by RRC signaled terminal equipment.
Fig. 2 shows a kind of access realization flow of E-FACH (enhanced FACH):
1. terminal is selected one in mode at random in the signature that allows, last signalling, request network insertion.
2. system is after receiving the signature signal that terminal on the UpPTS sends, and signature responded on through the FPACH channel of expansion and distributes the E-DCH resource.
3., then on the E-DCH that has distributed resource, send out the RRC connection and set up request message if terminal receives the affirmation of FPACH.
4. terminal is set up message at the RRC that the FACH channel receives network.
When UE request E-FACH inserted, network need be notified the resource allocation conditions of terminal E-DCH, can realize the resource distribution to the E-DCH channel by the expansion to FPACH.Such as transmitting the resource distribution label on FPACH, the resource distribution of each label correspondence is broadcasted in BCH.The FPACH information of carrying comprises like this:
{
(1) signature reference number (the signature number that target mobile phones is launched on UpPTS)
(2) relative subframe number (differential mode 4 of the subframe numbers when subframe numbers when target mobile phones is received FPACH and transmission SYNC_UL)
(3) launch time ((UpPTS of its emission beginning relatively) time migration of target mobile phones emission E-DCH)
(4) E-DCH resource distribution label
}
Be defined in PRACH info (for RACH) the message the inside that SIB5 (system information block 5) comprises in the existing TD-SCDMA agreement and indicated SYNC_UL info.Stipulated SYNC_UL codes bitmap and E-RUCCH SYNC_UL codes bitmap in this information element, represented that respectively PRACH message inserts and E-RUCCH message inserts the signature sequence that can adopt.SYNC_UL codes bitmap and E-RUCCH SYNC_UL codes bitmap are made up of 8 bits, and whether signature sequence of each bit indication is available.Like this sub-district can with signature sequence just be divided into two set, be used to refer to different access styles respectively.
For realize strengthening FACH and with the existing system compatibility, need when UE inserts at random, have feasible method to make network can know whether UE needs to strengthen fast FACH and insert.Network just can be given the corresponding acknowledge message of UE (to general access procedure, the original access procedure of network using need not distribute the E-DCH resource to UE on FPACH) according to the access style that UE selects like this, makes UE can finish corresponding access procedure.
Summary of the invention
The objective of the invention is to address the above problem, the stochastic signature sequence allocation method based on multifrequency point in a kind of enhanced FACH is provided, realization reaches purposes such as distinguishing access grade, differentiated service QoS and transmission subscriber traffic information to the flexible configuration that enhanced FACH (E-FACH) inserts.
Technical scheme of the present invention is: the present invention has disclosed the stochastic signature sequence allocation method based on multifrequency point in a kind of enhanced FACH, comprising:
Terminal sends the signature sequence of access of PRACH message and the access of E-RUCCH message to network on the dominant frequency point of sub-district, network on the auxilliary frequency in sub-district, sends the signature sequence that enhanced FACH inserts, so that can judge whether access is that enhanced FACH inserts according to the frequency point information of the signature sequence that receives;
Broadcast frequency point information in the system message of Serving cell, the access that network is initiated for terminal responds signature by FPACH on the frequency of sub-district dominant frequency point or system's regulation, and the frequency point information of FPACH is broadcasted in system message.
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, the signature sequence that can take on each auxilliary frequency of configuration in system message, system inserts with frequency point information and signature sequence data separation enhanced FACH by the above-mentioned parameter of configuration.
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, the configuration of signature sequence comprises:
In the SYNC_UL info message under the PRACH of SIB5 standard info, increase an E-FACH Access Info parameter, this parameter is listed the signature sequence label that can adopt on all possible auxilliary frequency point information and each frequency.
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, SYNC_UL info message is as shown in the table:
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| SYNC_ UL codes bitmap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. | |
| PRX UpPCHdes | Force to occur | Integer (1 20...-58 by step of 1) | The dBm of unit | |
| Power Ramp Step | Force to occur | Integer (0,1,2,3) | The dB of unit | |
| Max SYNC_ UL Transmi ssions | Force to occur | Integer (1,2,4,8) | Adjust the maximum times that SYNC_UL sends in the sequence at power |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| Mmax | Force to occur | Integer (1.. 32) | Attempt synchronous maximum times | |
| E-RUC CH SYNC_ UL codes bitmap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. | |
| E-FAC H Access Info | Select to occur | 1 to＜m axT DD 128 Car rier-1 〉 | Frequency and relevant information that the E-FACH type inserts. |
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, this E-FACH Access Info parameter comprises Frequency info and two parameters of E-FACH SYNC_ULcodes bitmap, wherein Frequency info parametric representation is the frequency point information of auxilliary frequency, E-FACH SYNC_UL codes bitmap parametric representation is carried out enhanced FACH and is inserted the signature sequence that can adopt on this frequency, each bit represents that the sub-district allows a signature that uses.
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, this E-FACH Access Info parametric representation is a following table:
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| Frequency info | Force to occur | Frequen cy info | Frequency point information | |
| E-FACH SYNC_UL codes bimap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. |
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, this Frequency info parameter is as shown in the table:
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| CHOICE mode | Force to occur | |||
| ＞FDD | ||||
| ＞＞UARFCN uplink(Nu) | Select to occur | Integer(0 ..16383) | If this IE does not occur, be adopted as the acquiescence two-way range of working band definition, definition in 3GPP TS 25.101 | |
| ＞＞UARFCN downlink(Nd) | Force to occur | Integer(0 .. 16383) | Definition in 3GPP TS 25.101 | |
| ＞TDD |
| CHOICE mode | Force to occur | |||
| ＞＞UARFCN(Nt) | Force to occur | Integer(0 .. 16383) | Definition in 3GPP TS 25.102 |
The stochastic signature sequence allocation method based on multifrequency point in the above-mentioned enhanced FACH wherein, among the FPACH info in the PRACH of SIB5 standard info message, increases Frequency info to show the frequency at FPACH place.
Stochastic signature sequence allocation method in the above-mentioned enhanced FACH based on multifrequency point, wherein, this FPACH info such as following table:
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described | Version |
| Timeslot number | Force to occur | Integer(0 ..6) | REL-4 | ||
| Channelisation code | Force to occur | Enumera ted((16/1 )..(16/16) | REL-4 | ||
| Midamble Shift and burst type | Force to occur | Midambl e shift and burst type | REL-4 | ||
| WT | Force to occur | Integer(1 ..4) | After SYNC_UL sends, can send the number of subframes of FPACH | REL-4 |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described | Version |
| Frequency info | Select to occur | Frequen cy info | The FPACH frequency point information |
The present invention contrasts prior art following beneficial effect: method of the present invention inserts for enhanced FACH, make UE send signature sequence on the auxilliary frequency of certain system's regulation, network can judge whether access is the access of needs enhanced FACH according to the frequency point information of the signature sequence that receives like this.The contrast prior art, the present invention realizes the difference that PRACH message inserts and E-RUCCH message inserts in E-FACH access and the existing protocol, makes network can discern the signature type of UE, finally finishes corresponding random access procedure.Method of the present invention is changed little to existing agreement, and has good forward compatibility.
Description of drawings
Fig. 1 is the flow chart that existing 3G system calling is set up.
Fig. 2 is the access process figure of enhanced FACH.
Fig. 3 is that UE termination of the present invention is gone into flow chart.
Fig. 4 is network terminal access process figure of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The particular content based on the stochastic signature sequence allocation method of multifrequency point in the enhanced FACH of the present invention is: in N frequency TD-SCDMA system, the random access procedure signature process of traditional business (for example PRACH message access, E-RUCCH message insert) is all carried out at the dominant frequency point, this is consistent with present prior art, promptly UE send on the dominant frequency point of sub-district that PRACH message inserts and the signature sequence of E-RUCCH message access to network.Insert for enhanced FACH (E-FACH), UE sends signature sequence on the auxilliary frequency of certain system's regulation, and network can judge whether access is the access of needs enhanced FACH according to the frequency point information of the signature sequence that receives like this.Frequency point information is broadcasted in the system message of Serving cell.For the access of initiating, network will respond signature by FPACH at the frequency of dominant frequency point or other system regulation, and the frequency point information of FPACH is broadcasted in system message.
In order to indicate E-FACH to insert, need to give the E-FACH type to insert the signature sequence of auxilliary frequency of appointment and permission, UE sends signature sequence on auxilliary frequency just can reach the purpose of distinguishing access style to network.Say that in principle 8 signature sequences that this sub-district allows can be as the signature of E-FACH access.For more flexible, the present invention takes following a kind of mode: provide the signature sequence that can take on each auxilliary frequency in system message.System reaches the purpose of distinguishing E-FACH access different business qos requirement, different access grades by this group parameter of configuration with frequency point information and signature sequence information.
Specific implementation is got up, and is by revising the SYNC_UL info message under the PRACH info among the industry standard SIB5 (system information bloCk5), and is as shown in table 1.Increase an IE " E-FACH Access Info ", this IE lists the signature sequence label (auxilliary frequency points is not more than maximum carrier number and subtracts 1) that can adopt on all possible auxilliary frequency point information and each frequency, and concrete structure is as shown in table 2.First " Frequency info " is the frequency point information of certain auxilliary frequency in the table 2, and the information content is identical with existing standard, and is as shown in table 3; Second is " E-FACHSYNC_UL codes bimap ", be illustrated in and carry out E-FACH on this frequency and insert to adopt which signature sequence, each bit represents that this sub-district allows a signature that uses, if bit for " 1 " then this sequence can use, for " 0 " is then represented unavailable.
Table 1 SYNC_UL info
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| SYNC_ UL codes bitmap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. | |
| PRX UpPCHdes | Force to occur | Integer (1 20...-58 by step of 1) | The dBm of unit | |
| Power Ramp Step | Force to occur | Integer (0,1,2,3) | The dB of unit |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| Max SYNC_ UL Transmi ssions | Force to occur | Integer (1,2,4,8) | Adjust the maximum times that SYNC_UL sends in the sequence at power | |
| Mmax | Force to occur | Integer (1.. 32) | Attempt synchronous maximum times | |
| E-RUC CH SYNC_ UL codes bitmap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| E-FAC H Access Info | Select to occur | 1 to <m axT DD 128 Car rier- 1> | Frequency and relevant information that the E-FACH type inserts. |
Table 2 E-FACH Access Info
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| Frequency info | Force to occur | Frequen cy info | Frequency point information | |
| E-FACH SYNC_UL codes bimap | Force to occur | Bitstring (8) | The validity of a SYNC_UL sign indicating number of each bit indication, wherein the SYNC_UL sign indicating number is numbered to " sign indicating number 7 " from " sign indicating number 0 ".Bit value is 1 to represent the SYNC_UL sign indicating number of its correspondence to be used.Bit value is 0 to represent the SYNC_UL sign indicating number of its correspondence not to be used. |
Table 3 Frequency info
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described |
| CHOICE mode | Force to occur | |||
| ＞FDD | ||||
| ＞＞UARFCN uplink(Nu) | Select to occur | Integer(0 ..16383) | If this IE does not occur, be adopted as the acquiescence two-way range of working band definition, definition in 3GPP TS 25.101 | |
| ＞＞UARFCN downlink(Nd) | Force to occur | Integer(0 .. 16383) | Definition in 3GPP TS 25.101 | |
| ＞TDD | ||||
| ＞＞UARFCN(Nt) | Force to occur | Integer(0 .. 16383) | Definition in 3GPP TS 25.102 |
Owing to stipulated FPACH info in the PRACH Definiton in system broadcast message PRACH info (for RACH), made each PRACH all corresponding with a FPACH.Network can be provided with by parameter and guarantee all only corresponding FPACH channel of each signature sequence.That is to say, when UE initiates signature request, just utilize system message to know and on that FPACH channel, monitor Signature Confirmation information.In order to make network more flexible to the response that inserts signature, the present invention has increased the FPACH frequency point information in broadcast, concrete way is in SIB5 " PRACH info " message " FPACH info ", increase the frequency that " Frequency info " shows the FPACH place, its structure is as shown in table 4.So, network just can not only send the FPACH response at dominant frequency point, also can send at auxilliary frequency, uses more flexible.
Table 4 FPACH info
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described | Version |
| Timeslot number | Force to occur | Integer(0 ..6) | REL-4 | ||
| Channelisation code | Force to occur | Enumera ted((16/1 )..(16/16) | REL-4 |
| Cell/group name | Requirement | Multiple | Type and reference | Implication is described | Version |
| Midamble Shift and burst type | Force to occur | Midambl e shift and burst type | REL-4 | ||
| WT | Force to occur | Integer(1 ..4) | After SYNC_UL sends, can send the number of subframes of FPACH | REL-4 | |
| Frequency info | Select to occur | Frequen cy info | The FPACH frequency point information |
When an application E-FACH UE that inserts and the UE that applies for traditional access adopted identical signature to initiate signature request simultaneously, if network adopts present FPACH response to sign, two UE can think that this response is to send to oneself.Can take out a bit in the bit that FPACH reserves and insert indication as E-FACH, what expression responded is that E-FACH inserts or tradition inserts.
Insert for E-FACH, the FPACH content need expand, and makes it comprise E-DCH resource distribution label.Like this, UE just can send RRC and set up request on the E-DCH channel after obtaining the network response.
Above-mentioned modification to system message can realize network to the flexible configuration that E-FACH inserts, and reaches purposes such as distinguishing access grade, differentiated service QoS and transmission subscriber traffic information.Applicating example is as follows:
Use 1:
Network can carry out the division of E-FACH access grade to the user.Allow auxilliary frequency number and the number of signature sequences purpose difference used when stipulating that for the user of different priorities E-FACH inserts.The user of high priority can use more frequency and signature, and collision probability is little, access speed is fast.
Use 2:
Network can be divided according to qos requirement the E-FACH business.Allow to use more frequency and signature to initiate to insert for the high business of qos requirement.
Fig. 3 shows the random access procedure of user terminal.
Step S300: user terminal is finished down-going synchronous, obtains signature sequence information and frequency point information from broadcast.Determine that according to this grouping information access style is that RACH message inserts, E-RUCCH message inserts or E-FACH message inserts.When access style is the access of RACH message, enter step S301; When access style is the access of E-RUCCH message, enter step S311; When access style is the access of E-FACH message, enter step S321.
Step S301: user terminal is according to upper-layer service demand and present located connection status, signature sequence of picked at random from the signature of SYNC_UL codes bitmap regulation.Enter step S302 then.
Step S302: user terminal sends the signature sequence of choosing on the dominant frequency point of sub-district.
Step S303: in the number of subframes of network regulation, wait for the affirmation response of network.If signature is not responded, then return step S301; Otherwise enter step S304.
Step S304: user terminal adopts the PRACH channel to send RRC according to access style and sets up request, and flow process finishes.
Step S311: user terminal is according to upper-layer service demand and present located connection status, signature sequence of picked at random from the signature of E-RUCCH SYNC_UL codes bitmap regulation.Enter step S312 then.
Step S312: user terminal sends the signature sequence of choosing on the dominant frequency point of sub-district.
Step S313: in the number of subframes of network regulation, wait for the affirmation response of network.If signature is not responded, then return step S311; Otherwise enter step S314.
Step S314: user terminal adopts the E-RUCCH channel to send RRC according to access style and sets up request, and flow process finishes.
Step S321: auxilliary frequency of user terminal selecting, and according to upper-layer service demand and present located connection status, signature sequence of picked at random from the signature of E-FACH SYNC_UL codes bitmap regulation.Enter step S322 then.
Step S322: user terminal sends the signature sequence of choosing on the auxilliary frequency of selecting.
Step S323: in the number of subframes of network regulation, wait for the affirmation response of network.If signature is not responded, then return step S321; Otherwise enter step S324.
Step S324: user terminal adopts the E-DCH channel to send RRC according to access style and sets up request, and flow process finishes.
Fig. 4 illustrates the random access procedure of the network terminal of knowing clearly.Specifically comprise:
Step S400: network receives signature sequence.
Step S401: judge that signature sequence is initiated subframe and whether current sub-frame interval surpasses system's setting.If surpass then return step S400, otherwise enter step S402.
Step S402: judge access style according to frequency point information and signature sequence,, then enter step S403 if RACH or E-RUCCH message insert; If E-FACH message inserts, then enter step S404.
Step S403: send the FPACH information of stipulating in the protocols having, enter step S405 then.
Step S404: send the FPACH information that has comprised the E-DCH resource allocation information of expansion, enter step S405 then.
Step S405: receive RRC and set up request.
Step S406: send RRC and set up affirmation.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (9)
1. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH comprises:
Terminal sends the signature sequence of access of PRACH message and the access of E-RUCCH message to network on the dominant frequency point of sub-district, network on the auxilliary frequency in sub-district, sends the signature sequence that enhanced FACH inserts, so that can judge whether access is that enhanced FACH inserts according to the frequency point information of the signature sequence that receives;
Broadcast frequency point information in the system message of Serving cell, the access that network is initiated for terminal responds signature by FPACH on the frequency of sub-district dominant frequency point or system's regulation, and the frequency point information of FPACH is broadcasted in system message.
2. the stochastic signature sequence allocation method in the enhanced FACH according to claim 1 based on multifrequency point, it is characterized in that, the signature sequence that in system message, can take on each auxilliary frequency of configuration, system inserts with frequency point information and signature sequence data separation enhanced FACH by the parameter of this signature sequence of configuration.
3. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH according to claim 2 is characterized in that, the configuration of signature sequence comprises:
In the SYNC_UL info message under the PRACH of SIB5 standard info, increase an E-FACH Access Info parameter, this parameter is listed the signature sequence label that can adopt on all possible auxilliary frequency point information and each frequency.
4. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH according to claim 3 is characterized in that, SYNC_UL info message is as shown in the table:
。
5. the stochastic signature sequence allocation method in the enhanced FACH according to claim 4 based on multifrequency point, it is characterized in that, this E-FACH Access Info parameter comprises Frequency info and two parameters of E-FACH SYNC_UL codes bitmap, wherein Frequency info parametric representation is the frequency point information of auxilliary frequency, E-FACH SYNC_UL codes bitmap parametric representation is carried out enhanced FACH and is inserted the signature sequence that can adopt on this frequency, each bit represents that the sub-district allows a signature that uses.
6. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH according to claim 5 is characterized in that, this E-FACH Access Info parametric representation is a following table:
。
7. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH according to claim 6 is characterized in that, this Frequency info parameter is as shown in the table:
。
8. the stochastic signature sequence allocation method in the enhanced FACH according to claim 7 based on multifrequency point, it is characterized in that, among the FPACH info in the PRACH of SIB5 standard info message, increase Frequency info to show the frequency at FPACH place.
9. the stochastic signature sequence allocation method based on multifrequency point in the enhanced FACH according to claim 8 is characterized in that, this FPACH info such as following table:
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| RAN WG1.R1-073797,Improved E-HICH signature sequence allocationfor LCR TDD.3GPP.2007,(3),全文. * |
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