CN1731749A - Multi-carrier frequency system access method - Google Patents
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Abstract
This invention relates to a multiple carrier frequency system switch-in method, Used in multiple carrier frequency system including user facility, which comprises the following steps: a the system deciding coefficient relation between the rapid switch-in physics channel and random switch-in physics channel in the main carrier frequency and ascending polit channel in the auxiliary carrier frequency; b, according to the above relation, allocating rapid switch-in physics channel and random switch-in physics channel in the main carrier frequency; c, user facility sending ascending synchronous code in the ascending polit channel of the auxiliary carrier; d, via the rapid switch-in physics channel, receiving feedback information of the system, and based on the confirmed information, sending switch-in information in the random switch-in physics channel of the main carrier, and finishing the system switch-in work. The invention can solve the problem of collision and blocking caused by shortage of resource with too many users, and of interruption in the same location caused by not adopting public descending channel without power control in the several auxiliary frequencies.
Description
Technical field
The present invention relates to the communications field, particularly relate to the method that a kind of multi-carrier frequency system inserts.
Background technology
(Time Division Synchronize Multiple Access TD-SCDMA), is called low spreading rate (1.28MCps, 1.28 million chips/sec) time-division multiplex technology scheme to TD SDMA in International Telecommunication Union's standard.The TD-SCDMA power system capacity is big, and therefore necessary site quantity is lacked than gsm system when construction network covers, and has also reduced the networking investment simultaneously, so it is widely used in the communications field as typical multi-carrier frequency system.
In present TD-SCDMA system, there is the method that adopts main carrier frequency to add several assistant carrier frequencies to realize that multi-carrier frequency cell covers to realize that multi-carrier frequency system inserts, but this method not can solve collision and the obstruction that the access owing to how new user causes the access-in resource deficiency to cause; So adopt (the Uplink Pilot Channel of collocating uplink pilot channel on a plurality of carrier frequency again, UpPCH) to realize that multi-carrier frequency system inserts, but this method fails again to solve owing to adopting the common downlink channel that does not have power control to cause the technical problem of disturbing between same cell multi-carrier frequency in a plurality of assistant carrier frequencies, so, improve the active demand that the multi-carrier frequency system access performance has become people in order to guarantee the communication quality of users' equipment.
(Time Division Synchronize MultipleAccess TD-SCDMA) in the multi-carrier frequency system, adopts a main carrier frequency to add that the method for several assistant carrier frequencies realizes that multi-carrier frequency cell covers to the TD SDMA of prior art one.As shown in Figure 1,, as can be seen from the figure, in dominant frequency point, dispose Common Control Channel, dedicated channel (may contain), at auxilliary frequency 1, assist frequency 2... and assist frequency N and only dispose dedicated channel for the frequency configuration of the base station range of prior art one.
In same sub-district, base station node B only on main carrier frequency, send descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS) and be fixed on broadcast message on first and second code channels of TS0.The while Common Control Channel, as S-CCPCH Secondary Common Control Physical Channel (SecondaryCommon Control Channel, SCCPCH), Page Indication Channel (Paging IndicatorChannel, PICH), Physical Random Access Channel (Physical Random Access Channel, PRACH), (Uplink Pilot Channel, (Fast Physical Access Channel, FPACH) grade is configured on the main carrier frequency ascending pilot channel UpPCH) and fast to insert physical channel.
Only in the dominant frequency point Common Control Channel is arranged in the prior art one, so only in the dominant frequency point access-in resource UpPTS is arranged, FPACH, PRACH channel.Because ascending pilot channel (Uplink PilotChannel UpPCH) is configured on the main carrier frequency, do not dispose on the assistant carrier frequency ascending pilot channel (UplinkPilot Channel, UpPCH).In the sub-district UE all the ascending pilot channel by main carrier frequency (UplinkPilot Channel, UpPCH) access network receives at random.
Prior art two is aimed at a multi-carrier frequency cell that N carrier frequency arranged, (the Uplink Pilot Channel of collocating uplink pilot channel on m carrier frequency, UpPCH), 1＜=m＜=N wherein, as shown in Figure 2, the dominant frequency point disposes Common Control Channel, dedicated channel (may contain), auxilliary frequency 1 disposes dedicated channel, dispose ascending pilot channel (Uplink Pilot Channel, UpPCH) 323, with ascending pilot channel (Uplink Pilot Channel, UpPCH) be mutually related and insert fast physical channel (Fast Physical Access Channel, FPACH) and Physical Random Access Channel (PhysicalRandom Access Channel, PRACH).
Must the collocating uplink pilot channel on the main carrier frequency (Uplink Pilot Channel, UpPCH), on assistant carrier frequency, can the collocating uplink pilot channel (Uplink Pilot Channel, UpPCH).Concrete configuration is more flexible, does not limit.For example, can on all assistant carrier frequencies, dispose UpPCH, also can on the part assistant carrier frequency, dispose UpPCH; Can on certain assistant carrier frequency, dispose 8 sign indicating numbers, also can a configuration section sign indicating number.
Ascending pilot channel (Uplink Pilot Channel is mutually related, UpPCH), insert physical channel (Fast Physical Access Channel fast, FPACH) and Physical Random Access Channel (Physical Random Access Channel PRACH) is limited on the same carrier frequency.The quick access physical channel of the signature of same carrier and same carrier (Fast Physical Access Channel, FPACH) association; The quick access physical channel of same carrier (Fast Physical AccessChannel, FPACH) and Physical Random Access Channel (Physical RandomAccess Channel, the PRACH) association of same carrier.As, 8 SYNC-UL sign indicating numbers are respectively 0,1, and 2,3,4,5,6,7; Article 2, FPACH is respectively FPACH0, FPACH1; Article 3, PRACH is respectively PRACH0, PRACH1, PRACH3.They can be divided into two associative combination, interrelated relation as shown in Figure 3, in the incidence relation 1, the SYNC-UL sign indicating number is respectively 0,1,2,3, FPACH is 0, PRACH is 0,1; In the incidence relation 2, the SYNC-UL sign indicating number is respectively 4,5,6,7, and FPACH is 1, and PRACH is 3.
When the SYNC-UL sign indicating number in the UE selection associative combination 1 wherein, UTRAN can only feed back by FPACH0.Can determine to use which PRACH channel according to the time of its feedback, when the FPACH feedback time is the follow-up even number subframe (2 that sends subframe at SYNC-UL, 4,6) time, UE will use PRACH0 to send and insert message, be the follow-up odd number subframe (1,3 that sends subframe at SYNC-UL when the FPACH feedback time, 5) time, UE will use PRACH1 to send and insert message.This shows, when sending uplink synchronous code (Synchronization-Uplink, SYNC-UL) during sequence, employed quick access physical channel (Fast PhysicalAccess Channel when UE has just known access, FPACH) resource, Physical Random Access Channel (Physical RandomAccess Channel, PRACH) resource.
When up FPACH inserted, (Uplink Pilot Channel UpPCH) inserted, and perhaps (Uplink Pilot Channel UpPCH) inserts at the ascending pilot channel of minor carrier to be chosen in the ascending pilot channel of main carrier frequency at random by user UE; Also can will need the user who inserts to be evenly distributed on the different carrier frequency by spuious function as far as possible.Like this since on last trade when channel inserts frequently the user selectively select, or the user is evenly distributed, reduce thereby make to conflict.But, in the sub-district farthest or the poorest user terminal of signal quality still can receive FPACH, descending FPACH does not have power control, but adopts more high-power transmission, easily adjacent carrier frequency is caused interference.
Analyze in conjunction with the method that above-mentioned overloading frequency connecting system inserts at random, can draw prior art and have the following disadvantages:
Prior art one has (N-1) individual assistant carrier frequency in the sub-district under overloading frequency situation (supposing N carrier frequency), common N number of users that carrier frequency is supported will be N times under single carrier frequency situation.(Uplink Pilot Time Slot UpPTS) is configured on the main carrier frequency, the uplink pilot time slot that all UE will be by main carrier frequency in the sub-district (Uplink Pilot Time Slot, UpPTS) access network at random because uplink pilot time slot.After number of users is multiplied, (Uplink PilotTime Slot UpPTS) without any increase, still is 8 uplink synchronous code (Synchronization-Uplink on the main carrier frequency to the access-in resource uplink pilot time slot, SYNC-UL), be easy to cause the collision and the obstruction of access like this.
Prior art two overloadings are accidental access method frequently, though the collision and the generation of blocking in the time of can reducing the multi-user and insert, but in a plurality of assistant carrier frequencies, adopt quick access physical channel (the Fast Physical Access Channel of the common downlink channel that does not have power control, FPACH), must cause the interference between the common downlink channel carrier frequency to increase.
Summary of the invention
The present invention is in order to solve collision and the obstruction that the access-in resource deficiency causes in the prior art one; The technical problem of disturbing between same cell multi-carrier frequency in the prior art two provides a kind of method that improves the multi-carrier frequency system access performance, to realize the improving performance that multi-carrier frequency system inserts.
For addressing the above problem, the invention provides a kind of method that improves the multi-carrier frequency system access performance, this method is applied to comprise the multi-carrier frequency system of subscriber equipment, it comprises:
A, system determine the quick access physical channel on the main carrier frequency and the incidence relation of the ascending pilot channel on Physical Random Access Channel and the assistant carrier frequency;
B, dispose on main carrier frequency according to described incidence relation and to insert fast physical channel and Physical Random Access Channel;
C, subscriber equipment send uplink synchronous code on the ascending pilot channel of assistant carrier frequency;
D, by the quick access physical channel receiving system feedack on the main carrier frequency, and send at the Physical Random Access Channel of the main carrier frequency of correspondence according to confirmation and to insert message, the system that finishes inserts.
Also comprise between wherein said step C and the D: system judges whether the uplink synchronous code of the uplink synchronous code of assistant carrier frequency and main carrier frequency is identical, if it is identical, execution in step D then, if inequality, then system broadcast the uplink synchronous code of assistant carrier frequency to user terminal on main carrier frequency.
Wherein said step D further comprises: judge whether that the quick access physical channel on main carrier frequency receives feedback information, if receive, then send at the Physical Random Access Channel of the main carrier frequency of correspondence and insert message; Otherwise wait for a period of time, return step D.
Wherein this method also further comprises: set up the incidence relation table in system, be used to preserve the quick access physical channel on the main carrier frequency and the incidence relation of the ascending pilot channel on Physical Random Access Channel and the assistant carrier frequency.
Wherein described return step D before, also comprise: subscriber equipment is readjusted launch time and transmitting power.
Wherein before described transmission inserts message, also comprise: subscriber equipment is adjusted launch time and transmitting power.
8 of wherein said ascending pilot channel configurations or be less than 8 uplink synchronous codes.
Compared with prior art, the present invention has following beneficial effect: at first, because by using access-in resource uplink pilot time slot (the Uplink Pilot Time Slot of assistant carrier frequency, UpPTS), thereby when making number of users in the sub-district increase, access-in resource, as up pilot channel (Uplink PilotChannel, UpPCH), insert physical channel (Fast Physical Access Channel fast, FPACH), PRACH) also can correspondingly increase, thereby avoided collision and the obstruction that the access-in resource deficiency causes in the prior art one.Secondly, because with Physical Random Access Channel (PhysicalRandom Access Channel, PRACH) and fast insert physical channel (Fast PhysicalAccess Channel, FPACH) be limited on the main carrier frequency, thereby feasible quick access physical channel (the Fast Physical Access Channel that does not have the common downlink channel of power control, FPACH) be limited in main carrier frequency, reduced between carrier frequency and disturbed; Because Physical Random Access Channel (PhysicalRandom Access Channel, PRACH) be limited in main carrier frequency, so except uplink pilot time slot (Uplink Pilot Time Slot, UpPTS) outside, other up channel time slots on the assistant carrier frequency can both distribute as private resource, thereby make things convenient for RRM, and then improve the multi-carrier frequency system access performance.
Description of drawings
Fig. 1 is the frequency allocation plan of same position sub-district in the prior art one;
Fig. 2 is the frequency allocation plan of same position sub-district in the prior art two;
Fig. 3 is the interrelated table of SYNC-UL, FPACH and PRACH in the prior art one;
Fig. 4 is the TD-SCDMA frame assumption diagram;
Fig. 5 is the frequency allocation plan of same position sub-district among the present invention;
Fig. 6 is the interrelated table of SYNC-UL among the present invention, FPACH and PRACH;
Fig. 7 is a flow chart of the present invention;
English abbreviation implication among Fig. 1:
Ms: millisecond;
Us: microsecond;
TS: time slot (Time Slot, TS);
DwPTS: descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS); Be also referred to as downlink pilot frequency channel (Downlink Pilot CHannel, DwPCH); UpPTS: uplink pilot time slot (Uplink Pilot Time Slot, UpPTS); Be also referred to as, and ascending pilot channel (UplinkPilot Channel, UpPCH);
GP: protection at interval.
Embodiment
As shown in Figure 4, in time, (Time Division SynchronizeMultiple Access, TD-SCDMA) signal is divided into one section, one section periodic time quantum to TD SDMA.A basic time quantum is called " radio frames ", and the time span of each radio frames is 10ms (millisecond).Each radio frames is divided into " subframe " that two time spans equate, the time span of each subframe is 5ms.Each subframe is divided into several different parts; 7 time slot (Time Slot that time span is identical are wherein arranged; TS); and descending pilot frequency time slot (the Downlink Pilot Time Slot of position between the 0th time slot (TS0) and the 1st time slot (TS1); DwPTS), (Uplink Pilot Time Slot is UpPTS) with segment protect interval (GP) for uplink pilot time slot.
Each time slot according to the difference of sense, is divided into two types of up direction and down directions.Up direction is meant, the wireless signal that in this slot time, transmits, and by the UE emission, NodeB receives; Down direction is meant, the wireless signal that in this slot time, transmits, and by the NodeB emission, UE receives.
TD SDMA (Time Division Synchronize Multiple Access, TD-SCDMA) in the standard, TS0 always is designated as down direction, TS1 always is designated as up direction.TS2, TS3 ..., TS6 will dynamically be appointed as up direction or down direction according to the needs of business.In addition, (Downlink Pilot Time Slot DwPTS) is down direction to descending pilot frequency time slot, and (Uplink Pilot Time Slot UpPTS) is up direction to uplink pilot time slot.Between the time slot of up direction and the time slot of down direction, separately by a transfer point.
In the technical scheme of the present invention, for a multi-carrier frequency cell that N carrier frequency arranged, therein collocating uplink pilot channel on m carrier frequency (Uplink Pilot Channel, UpPCH), 1＜=m＜=N wherein.In m the carrier frequency, because there is not difference between the carrier frequency, can specify a carrier frequency at random is main carrier frequency, and all the other are appointed as assistant carrier frequency.As shown in Figure 5, dispose Common Control Channel on the main carrier frequency, also can contain dedicated channel, promptly must the collocating uplink pilot channel on the main carrier frequency (Uplink PilotChannel, UpPCH); On assistant carrier frequency, (Uplink Pilot Channel UpPCH), for example, can dispose UpPCH on all assistant carrier frequencies, also can dispose UpPCH on the part assistant carrier frequency can to require the flexible configuration ascending pilot channel according to system configuration; Can on certain assistant carrier frequency, dispose 8 sign indicating numbers, also can a configuration section sign indicating number.
Insert fast in the present invention physical channel (Fast Physical Access Channel, FPACH) and Physical Random Access Channel (Physical Random Access Channel, PRACH) interrelated.The incidence relation of the two as shown in Figure 6,8 SYNC-UL sign indicating numbers on main carrier frequency, assistant carrier frequency 1 and the assistant carrier frequency 2 are respectively 0,1,2,3,4,5,6,7; Article 5, FPACH is respectively FPACH0, FPACH1, FPACH2, FPACH3, FPACH4; Article 7, PRACH is respectively PRACH0, PRACH1, PRACH3, PRACH4, PRACH5, PRACH6.They can be divided into 5 associative combination, and associative combination 1 promptly is positioned at the SYNC- UL 0,1,2,3 and the FPACH 0 of main carrier frequency and PRACH 0,1 correspondence of main carrier frequency of main carrier frequency; Associative combination 2, the SYNC-UL 4,5,6,7 that promptly is positioned at main carrier frequency is corresponding with the PRACH 2 of the FPACH 1 of main carrier frequency and main carrier frequency; Associative combination 3, the SYNC- UL 0,1,2,3 that promptly is positioned at assistant carrier frequency 1 is corresponding with the PRACH 3 of the FPACH 2 of main carrier frequency and main carrier frequency; Associative combination 4, the SYNC-UL 4,5,6,7 that promptly is positioned at assistant carrier frequency 1 is corresponding with the PRACH 4 of the FPACH 3 of main carrier frequency and main carrier frequency; Associative combination 5 promptly is positioned at the SYNC- UL 0,1,2,3 and the FPACH 4 of main carrier frequency and PRACH 5,6 correspondences of main carrier frequency of assistant carrier frequency 2.
UE select wherein associative combination 1 and during associative combination 2, identical in multi-carrier frequency system cut-in method and the prior art.When UE selected associative combination 3, UE selected the SYNC-UL sign indicating number (0,1,2,3) of auxilliary frequency 1, and UTRAN can only feed back by the FPACH2 of dominant frequency point, and UE can only put PRACH3 by dominant frequency subsequently and send access message.
When UE selected associative combination 5, UE selected the SYNC-UL sign indicating number (0,1,2,3) of auxilliary frequency 2, and UTRAN can only feed back by the FPACH4 of dominant frequency point.Can determine to use which PRACH channel according to the time of its feedback, when the FPACH feedback time is the follow-up even number subframe (2 that sends subframe at SYNC-UL, 4,6) time, UE will use dominant frequency point PRACH6 to send and insert message, be the follow-up odd number subframe (1,3 that sends subframe at SYNC-UL when the FPACH feedback time, 5) time, UE will use dominant frequency point PRACH5 to send and insert message.
Be mutually related insert fast physical channel (Fast Physical Access Channel, FPACH) and Physical Random Access Channel (Physical Random Access Channel PRACH) still is limited on the main carrier frequency.UE can (Uplink Pilot Channel UpPCH) inserts, also can (Uplink Pilot Channel UpPCH) inserts at the ascending pilot channel of assistant carrier frequency at the ascending pilot channel of main carrier frequency.But because main carrier frequency is different with the frequency of the assistant carrier frequency of being furnished with UpPCH, (Synchronization-Uplink SYNC-UL) can not produce interference yet therefore to use identical uplink synchronous code.
Specifically describe the concrete implementation step of multi-carrier frequency system access scheme below in conjunction with Fig. 7.
At first, execution in step S101, i.e. network configuration main and auxiliary carrier frequency access channel resource and incidence relation thereof.Carry in the process of configuration, several sections is configured below dividing:
1, network disposes common signal channel on main carrier frequency: downlink pilot frequency channel (Downlink PilotCHannel, DwPCH), ascending pilot channel (Uplink Pilot Channel, UpPCH), first Common Control Channel (Primary Common Control Physical Channel, PCCPCH), second Common Control Channel (Secondary Common Control Physical Channel, SCCPCH), Page Indication Channel (Paging Indicator Channel, PICH), Physical Random Access Channel (Physical Random Access Channel, PRACH) and fast insert physical channel (FastPhysical Access Channel, FPACH), this step is identical with the prior art scheme.
2, network on assistant carrier frequency the collocating uplink pilot channel ((Synchronization-Uplink, SYNC-UL) sign indicating number collection can be identical with the default situation of main carrier frequency, also can be different for its uplink synchronous code for Uplink Pilot Channel, UpPCH) channel.Assistant carrier frequency ascending pilot channel (Uplink Pilot Channel, UpPCH) uplink synchronous code (Synchronization-Uplink, SYNC-UL) sign indicating number collection and main carrier frequency ascending pilot channel (Uplink Pilot Channel, UpPCH) not simultaneously, need in the main carrier frequency system information, broadcast uplink synchronous code (Synchronization-Uplink, SYNC-UL) the sign indicating number collection of this assistant carrier frequency.
3, network disposes more physical channel (the Fast PhysicalAccess Channel that inserts fast on main carrier frequency, FPACH) and Physical Random Access Channel (Physical Random AccessChannel, PRACH), with cooperate ascending pilot channel newly-increased on the assistant carrier frequency (Uplink PilotChannel, UpPCH); And in the main carrier frequency system information these newly-increased quick access physical channel (Fast Physical Access Channel of broadcasting, FPACH)/Physical Random Access Channel (PhysicalRandom Access Channel, PRACH) with this assistant carrier frequency on the corresponding relation of ascending pilot channel.
Then, carry out next step S102, i.e. access-in resource on all main carrier frequencies and the assistant carrier frequency in the network statistics sub-district, and these resources are given different access service classes, and (Access ServiceClass ASC), and broadcasts in the system information of main carrier frequency.
Then, be that UE inserts part at random, UE inserts at random and comprises three processes: insert preparation, access at random, access interference processing at random at random.UE at first enters and inserts standby condition at random, and promptly UE execution in step S103 reads above-mentioned cell broadcast information, and therefrom obtains access-in resource configuration and related information.It is undertaken by following several parts:
When UE is under the idle pulley, it will be kept down-going synchronous and read above-mentioned cell broadcast information.From the used descending pilot frequency time slot of this sub-district main carrier frequency (Downlink Pilot Time Slot, DwPTS) in, transmit 32 descending synchronous code (Synchronization-Downlink, SYNC-DL), each SYNC-DL has unique sequence number 0,1,2...31, on DwPTS, UE can be inserted at random and be distributed to uplink pilot time slot (the Uplink Pilot Time Slot that main carrier frequency uses, UpPTS) 8 of physical channel uplink synchronous codes (Synchronization-Uplink, SYNC-UL) the sign indicating number collection of (characteristic signal).This yard collection has 256 different uplink synchronous code (Synchronization-Uplink, SYNC-UL) sequence, its sequence number is divided by 8, just can obtain descending pilot frequency time slot (Downlink PilotTime Slot, DwPTS) descending synchronous code in (Synchronization-Downlink, sequence number SYNC-DL).Round when indivisible when removing 8, suppose that the SYNC-DL sequence number is X, SYNC-UL is d, then u/8=d.The u that satisfies this formula has 8,8d, and 8d+1,8d+2 ..., 8d+7.From dominant frequency point broadcast cell system information, UE reads dominant frequency point broadcast channel, UE obtains which uplink synchronous code (Synchronization-Uplink that the main carrier frequency sign indicating number is concentrated, SYNC-UL) can be used, and obtain relative Physical Random Access Channel (Physical Random AccessChannel, PRACH) and fast insert physical channel (Fast Physical Access Channel, details FPACH) (sign indicating number of employing, spreading factor, midamble sign indicating number and time slot) with other with insert relevant information at random.
In addition, which assistant carrier frequency UE obtains and has disposed ascending pilot channel (Uplink Pilot Channel, UpPCH), with and the uplink synchronous code (Synchronization-Uplink that uses, SYNC-UL) sign indicating number collection, operable sign indicating number, obtain relative Physical Random Access Channel (PhysicalRandom Access Channel simultaneously, PRACH) and fast insert physical channel (Fast PhysicalAccess the Channel, (sign indicating number of employing of details FPACH), spreading factor, midamble sign indicating number and time slot) with other with insert relevant information at random.UE obtains and assistant carrier frequency ascending pilot channel (Uplink Pilot Channel, UpPCH) relevant PRACH and insert physical channel fast (FastPhysical Access Channel FPACH) is configured on the main carrier frequency.
In the contained information of BCH, different carrier frequency uplink synchronous code (Synchronization-Uplink have also been comprised, SYNC-UL) with quick physical channel (the Fast PhysicalAccess Channel that inserts, FPACH) resource, fast insert physical channel (Fast Physical AccessChannel, FPACH) with the interrelated relation of PRACH resource.As shown in Figure 6,8 SYNC-UL sign indicating numbers on main carrier frequency, assistant carrier frequency 1 and the assistant carrier frequency 2 are respectively 0,1,2,3,4,5,6,7; Article 5, FPACH is respectively FPACH0, FPACH1, FPACH2, FPACH3, FPACH4; Article 7, PRACH is respectively PRACH0, PRACH1, PRACH3, PRACH4, PRACH5, PRACH6.They can be divided into 5 associative combination, and associative combination 1 promptly is positioned at the SYNC- UL 0,1,2,3 and the FPACH 0 of main carrier frequency and PRACH 0,1 correspondence of main carrier frequency of main carrier frequency; Associative combination 2, the SYNC-UL 4,5,6,7 that promptly is positioned at main carrier frequency is corresponding with the PRACH 2 of the FPACH 1 of main carrier frequency and main carrier frequency; Associative combination 3, the SYNC- UL 0,1,2,3 that promptly is positioned at assistant carrier frequency 1 is corresponding with the PRACH 3 of the FPACH 2 of main carrier frequency and main carrier frequency; Associative combination 4, the SYNC-UL 4,5,6,7 that promptly is positioned at assistant carrier frequency 1 is corresponding with the PRACH 4 of the FPACH 3 of main carrier frequency and main carrier frequency; Associative combination 5 promptly is positioned at the SYNC- UL 0,1,2,3 and the FPACH 4 of main carrier frequency and PRACH 5,6 correspondences of main carrier frequency of assistant carrier frequency 2.
Therefore, when UE sends uplink synchronous code (Synchronization-Uplink, SYNC-UL) during sequence, according to above-mentioned incidence relation, which quick physical channel (Fast Physical Access Channel that inserts that use when it just obtains inserting, FPACH) resource and Physical Random Access Channel (Physical Random Access Channel, PRACH) resource.As, if UE select wherein associative combination 1 and during associative combination 2, identical in multi-carrier frequency system cut-in method and the background technology.When UE selected associative combination 3, UE selected the SYNC-UL sign indicating number (0,1,2,3) of auxilliary frequency 1, and UTRAN can only feed back by the FPACH2 of dominant frequency point, and UE can only put PRACH3 by dominant frequency subsequently and send access message; When if UE selects associative combination 5, UE selects the SYNC-UL sign indicating number (0,1,2,3) of auxilliary frequency 2, and UTRAN can only feed back by the FPACH4 of dominant frequency point.Can determine to use which PRACH channel according to the time of its feedback, when the FPACH feedback time is the follow-up even number subframe (2 that sends subframe at SYNC-UL, 4,6) time, UE will use dominant frequency point PRACH6 to send and insert message, be the follow-up odd number subframe (1,3 that sends subframe at SYNC-UL when the FPACH feedback time, 5) time, UE will use dominant frequency point PRACH5 to send and insert message.
UE then carries out random access procedure.Several parts were carried out below the random access procedure of UE divided.
Execution in step S104 at first, be ASC and the system information of UE according to self, determine (Synchronization-Uplink, SYNC-UL) sign indicating number collection promptly clearly go out to use which sign indicating number on which carrier frequency (main carrier frequency or assistant carrier frequency) to operable uplink synchronous code.The ASC correspondence priority of UE, usually the operable random access resource of UE that priority is high is many, collision probability is little during access.And the low operable access-in resource of user of priority is few, and collision probability is big during access.Different ASC correspondences the different associative combination in the above-mentioned contingency table, UE can select SYNC-UL in this combination.The ASC that has can corresponding a plurality of combinations, even all combinations, and obviously this moment, UE can select the SYNC-UL scope wider.
Next execution in step S105, be that UE is from 8 possible uplink synchronous code (Synchronization-Uplink, SYNC-UL) select one at random, then according to the UpPTS time of calculating by the DwPTS time, power by the open Loop Power control decision, UpPTS target by path loss that measures and system broadcasts is carried out received power, UE can determine ascending pilot channel (Uplink Pilot Channel according to the power that receives, UpPCH) launch time and power, (Uplink Pilot Channel UpPCH) sends to the base station to select uplink synchronous code to pass through ascending pilot channel then.Then be step S106, be UE with this uplink synchronous code (Synchronization-Uplink, SYNC-UL) correspondingly be in quick access physical channel on the main carrier frequency (Fast Physical Access Channel FPACH) goes up and monitors, to receive FPACH at any time.
Execution in step S107 then, promptly the base station node B in the network receive the uplink synchronous code that UE sends (Synchronization-Uplink, SYNC-UL) after, and search corresponding FPACH, to determine transmitting power and regularly to adjust according to the SYNC-UL that receives.If promptly the time forward, provide the time amount of delaying, otherwise provide Timing Advance; If power is too high, provides power reduction amount, otherwise provide the power recruitment.Subsequently, (Fast Physical Access Channel FPACH) sends to UE with power and time adjustment amount by inserting physical channel fast in 4 subframes that are close to thereafter.
Then execution in step S108, UTRAN will change the corresponding PRACH state that monitors over to, in order to receiving access information after will adjusting the time and sending to UE with the power adjustment information.
Follow execution in step S109, UE is from being in the relevant quick access physical channel of main carrier frequency (Fast Physical Access Channel, FPACH) the above-mentioned control information of middle reception.Because of FPACH/PRACH only disposes on main carrier frequency, so UE is after assistant carrier frequency sends UpPTS, then inserting action changes on the main carrier frequency, from being in the relevant quick access physical channel of main carrier frequency (Fast Physical Access Channel, FPACH) the above-mentioned control information of middle reception
Execution in step S110 subsequently, be that UE adjusts transmitting power and time, and guarantee behind ensuing two frames, inserting physical channel (Fast Physical AccessChannel fast corresponding to being in being somebody's turn to do of main carrier frequency, FPACH) (Physical Random AccessChannel PRACH) goes up transmission and inserts message Physical Random Access Channel.
In case work as UE from quick access physical channel (Fast Physical Access Channel, when receiving above-mentioned control information FPACH), in order on the correct time, to send to UTRAN with the most appropriate power, UE will adjust transmitting power and time according to the control information that UTRAN sends, as postponing or transmitting time in advance, increase or reduce power, to guarantee in ensuing two frame times, corresponding to inserting fast physical channel (Fast Physical Access Channel, FPACH) (Physical Random Access Channel PRACH) goes up transmission and inserts message Physical Random Access Channel.
Last execution in step S111 promptly monitors when on the corresponding PRACH access information being arranged the reception access information as UTRAN.
From as can be seen above-mentioned, UE inserts identical with existing scheme on main carrier frequency at random.When on assistant carrier frequency, initiating to insert at random, need (Uplink PilotChannel UpPCH) sends SYNC-UL, receives FPACH then and send PRACH all to change main carrier frequency at the ascending pilot channel of assistant carrier frequency.
3, access interference is handled at random
Under the situation that might bump, or in relatively poor communication environments, UE can not get any response of Node B.Therefore UE must be by new measurement, adjust launch time and transmitting power, and after through a random delay ascending pilot channel (the Uplink Pilot Channel on main carrier frequency or assistant carrier frequency, UpPCH) uplink synchronous code selected at random again of emission (Synchronization-Uplink, SYNC-UL).
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in technical scope disclosed by the invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (7)
1, the method that inserts of a kind of multi-carrier frequency system is applied to comprise it is characterized in that the multi-carrier frequency system of subscriber equipment, comprising:
A, system determine the quick access physical channel on the main carrier frequency and the incidence relation of the ascending pilot channel on Physical Random Access Channel and the assistant carrier frequency;
B, dispose on main carrier frequency according to described incidence relation and to insert fast physical channel and Physical Random Access Channel;
C, subscriber equipment send uplink synchronous code on the ascending pilot channel of assistant carrier frequency;
D, by the quick access physical channel receiving system feedack on the main carrier frequency, and send at the Physical Random Access Channel of the main carrier frequency of correspondence according to described feedback information and to insert message, the system that finishes inserts.
2, the method that inserts according to the described multi-carrier frequency system of claim 1 is characterized in that, also comprises between C and the D:
System judges whether the uplink synchronous code of assistant carrier frequency is identical with the uplink synchronous code of main carrier frequency, if identical, and execution in step D then, if inequality, then system broadcast the uplink synchronous code of assistant carrier frequency to user terminal on main carrier frequency.
3, the method that inserts according to the described multi-carrier frequency system of claim 2 is characterized in that described step D further comprises:
Judge whether that the quick access physical channel on main carrier frequency receives feedback information,, then send and insert message at the Physical Random Access Channel of the main carrier frequency of correspondence if receive; Otherwise wait for a period of time, return step D.
4, the method that inserts according to the described multi-carrier frequency system of claim 3 is characterized in that, also further comprises:
In system, set up the incidence relation table, be used to preserve the quick access physical channel on the main carrier frequency and the incidence relation of the ascending pilot channel on Physical Random Access Channel and the assistant carrier frequency.
5, the method that inserts according to the described multi-carrier frequency system of claim 4 is characterized in that, described return step D before, also comprise: subscriber equipment is readjusted launch time and transmitting power.
6, the method that inserts according to the described multi-carrier frequency system of claim 5 is characterized in that, before described transmission inserts message, also comprises: subscriber equipment is adjusted launch time and transmitting power.
7, the method that inserts according to the described multi-carrier frequency system of claim 6 is characterized in that, 8 of described ascending pilot channel configurations or be less than 8 uplink synchronous codes.
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| CNB2004100555919A CN100377540C (en) | 2004-08-07 | 2004-08-07 | Multi-carrier frequency system access method |
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| CN101453772B (en) * | 2007-12-05 | 2010-09-22 | 大唐移动通信设备有限公司 | Random access control method and apparatus |
| CN101568185B (en) * | 2008-04-25 | 2010-10-27 | 大唐移动通信设备有限公司 | Method and system for sending random access sequence |
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