A kind of configuration of special channel with multiple carrier frequency
Technical field
The present invention relates to the configuring technical of special-purpose channel in TD SDMA (TD-SCDMA, Time DivisionSychronize Multiple Access) system, particularly a kind of in the TD-SCDMA system configuration of special channel with multiple carrier frequency.
Background technology
TD-SCDMA be in May, 2000 by International Telecommunications Union, March calendar year 2001 by one of three main standard of the 3G (Third Generation) Moblie of third generation partnership plan (3GPP, Third Generation Partnership Project) approval.TD-SCDMA is called low spreading rate in the ITU standard, both 1.28 million chips/sec (1.28MCps) time-division multiplex technology schemes.
Fig. 1 is the structural representation of TD-SCDMA signal in the unit interval: in time, the TD-SCDMA signal is divided into sectional periodicity time quantum.A basic time quantum is called radio frames, and the time span of each radio frames is 10 milliseconds.Each radio frames is divided into the 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 (TS that time span is identical are wherein arranged; Time Slot); and the descending pilot frequency time slot (DwPTS of position between the 0th time slot (TS0) and the 1st time slot (TS1); DownlinkPilot Time Slot), a uplink pilot time slot (UpPTS, Uplink Pilot Time Slot) and segment protect interval (GP).
Each time slot according to the difference of sense, is divided into two types of up direction and down directions.Up direction is meant, transmitting wireless signals in this slot time, and by subscriber equipment (UE) emission, base station (NodeB) receives; Down direction is meant, the wireless signal that in this slot time, transmits, and by the NodeB emission, UE receives.
In the TD-SCDMA standard, TS0 always is designated as down direction, and TS1 always is designated as up direction.TS1, TS2 ..., TS6 will dynamically be appointed as up direction or down direction according to the needs of business.In addition, DwPTS is a down direction, and UpPTS is a up direction.Between the time slot of up direction and the time slot of down direction, separately by a transfer point.
UE in the TD-SCDMA system has two kinds of mode of operations: idle pulley and connection mode.Do not have communication between UE and the universal mobile telecommunications system Access Network under the idle pulley (UTRAN, UMTS Terrestrial RadioAccess Network), be holding state.Set up one between UE and the UTRAN under the connection mode and be connected, UTRAN has distributed sign in the Access Network for this UE, and has write down the information of this UE.Connection mode is divided into one of four states again, and is as follows respectively:
Cell dedicated channel status (CELL-DCH): the clear and definite UE of UTRAN is current at which sub-district CELL, and UTRAN is that UE has distributed dedicated channel (DCH, Dedicated Channel).Usually the UE that is carrying out speech business or high-speed data service is in this state.
Cell forward access channel status (CELL-FACH): the clear and definite UE of UTRAN is current at which sub-district CELL, UTRAN is not UE assigned with dedicated channel DCH, the user can use Random Access Channel (RACH, Random Access Channel) and forward access channel (FACH, ForwardAccess Channel).Usually the UE that is carrying out low-speed data service is in this state.
Cell paging channel status (CELL-PCH): the clear and definite UE of UTRAN is current at which sub-district CELL, and UTRAN is not UE assigned with dedicated channel DCH, and the user only can monitor descending paging channel (PCH, Paging Channel).This state can not send or receive data.
Access net registration district paging channel state (URA-PCH): the clear and definite UE of UTRAN is current at which access net registration district (URA, UTRAN Registration Area), UTRAN does not distribute DCH for UE, and the user only can monitor descending PCH, and this state can not send or receive data.
In a sub-district, the UE broadcast system information of the UTRAN of TD-SCDMA under idle pulley and connection mode.System information has been described the various configuration informations (SYSTEMINFORMATION) of current area.
UE receives the SYSTEMINFORMATION message of UTRAN broadcasting under idle pulley and connection mode one of four states.UE under idle pulley and the connection mode one of four states may obtain the various combination of system information block.Before obtaining, UE should discern its needed system information block at every turn.
Shared channel is a kind of special common signal channel, and it is to share the transmission channel that uses by a plurality of UE, can provide the radio bearer ability as dedicated channel.In TD-SCDMA, shared channel uses time slot format and the spreading code identical with dedicated channel.Shared channel can use separately, also can be used with dedicated channel.
Shared channel information is broadcasted in system message SIB17.System message SIB17 (SystemInformation Block Type 17) has described sub-district Physical Downlink Shared Channel (PDSCH, PhysicalDownlink Shared Channel) and Physical Uplink Shared Channel (PUSCH, Physical UplinkShared Channel) configuration information, the user must can receive SIB17 under the agreement regulation CELL-DCH state.When the user need use shared channel, UE read this information.
This SIB17 message goes up at broadcast channel (BCH, Broadcast Channel) and sends.BCH only is mapped on preceding two code channels of TS0, shows that SIB17 only sends on time slot TS0.
The foundation of the shared channel of UE is initiated by UE.Whether the Radio Resource control (RRC, RadioResource Control) of UE is idle by the professional buffering area of supervision self Radio Link control (RLC, Radio Link Control), thereby whether decision is to UTRAN application ascending physical signal shared channel.Fig. 2 is for setting up the flow chart of shared channel to UE, its detailed process is:
Step 200, UE initiate request by up shared physical channel capacity request messages (PUSCH CAPACITYREQUEST) to the RRC of UTRAN;
PUSCH CAPACITY REQUEST message purpose is to propose to use the application of shared channel.Mainly comprise some measurement results, judge and dispatch use for UTRAN.These measurement parameters all are optionally, mainly comprise as follows:
Currency, mean value and the variance of the RLC buffering area load of traffic carrying capacity (Traffic Volume): UE;
The ISCP of each time slot that slot interfering signal of time sign indicating number power (Timeslot ISCP): UE measures;
The first Common Control Channel received signal power (Primary CCPCH RSCP): UE receives the received signal code power (RSCP) of PCCPCH;
The RRC of step 201, UTRAN judges and dispatches, and distributes shared channel resources to give UE by Physical Shared Channel assignment messages (PHYSICAL SHARED CHANNEL ALLOCATION).
PHYSICAL SHARED CHANNEL ALLOCATION message has comprised shared channel PUSCH and/or PDSCH configuration information.UE sends data then according to this message arrangement shared channel on this channel.Mainly comprise as the lower part:
PUSCH/PDSCH distributes information in period (PUSCH/PDSCH allocation period info): share at one time because shared channel is a plurality of UE, therefore can indicate the time of use when distributing.General with distributing activationary time, promptly Connection Frame Number (CFN Connect Frame Number) and distribution life cycle are determined.Activationary time is to represent with CFN, and UE brings into use at the CFN of appointment.The distribution life cycle is one 1 to 255 a integer, and expression distributes the frame number that uses continuously;
PUSCH/PDSCH power control information (PUSCH/PDSCH power control info): shared channel can carry out closed power control separately, the parameter of power control has PUSCH target received power (PRXPUSCHdes), use for definite Initial Trans, only be used for Uplink Shared Channel.Also has power control step-size (TPC step size);
PUSCH/PDSCH information (PUSCH/PDSCH info): comprise the TFCS sign (TFCS ID) of shared channel, public gap information and PUSCH/PDSCH channel time slot and sign indicating number.
Because the UE under the CELL-DCH pattern can obtain time slot, sign indicating number, TFS and the TFCS of all PUSCH and PDSCH channel by SIB17.UE sets up PHYSICAL SHARED CHANNEL ALLOCATION message in the process by the uplink and downlink shared channel and obtains other information, as time started and duration, power control information; TFCS ID, time slot and sign indicating number etc.Comprehensive this two parts information, UE just can determine the configuration of its shared channel.
The same with other mobile communication system, in order to satisfy the ever-increasing demand in mobile communication market, carrying out in same sub-district that overloading covers frequently will be the important means that the TD-SCDMA system increases power system capacity.In order to accelerate the UE Cell searching time and to reduce neighbor cell measurement and switch complexity, only on a carrier frequency of sub-district, send pilot tone and broadcast message, a plurality of frequencies use a common broadcasting.
In present TD-SCDMA system, adopt a main carrier frequency to add that the mode of several assistant carrier frequencies realizes that multi-carrier frequency cell covers.In same sub-district, only on main carrier frequency, distribute DwPCH, PCCPCH, Common Control Channel, Page Indication Channel (PICH, Paging Indicator Channel), Physical Random Access Channel (PRACH, Physical Random Access Channel), UpPCH, physical access channel (FPACH, Fast Physical Access Channel) etc., wherein, Common Control Channel is as second Common Control Channel (SCCPCH).Different assistant carrier frequencies only is used for to different UE distribution service channels in the sub-district, at one time in, the different auxiliary carrier time slot that same sub-district is distributed to different UEs also should be different, thereby guarantee that the business that sends to different UEs can not produce interference.
The main carrier frequency of same sub-district and arbitrary assistant carrier frequency be complete matching in time.Fig. 3 is the overloading schematic diagram of coverage cell frequently, and first carrier frequency is a main carrier frequency among Fig. 3, and main carrier frequency TS0 is responsible for broadcast system information, and SIB17 issues in the crack at this moment.Assistant carrier frequency 1 all can only be used for the distribution of DCH to all time slots of assistant carrier frequency N.When the DCH of a certain assistant carrier frequency was distributed in TS0, this user must receive two carrier frequency simultaneously in order to receive SIB17 and dedicated service simultaneously, i.e. information on main carrier frequency and self assistant carrier frequency of living in.
Under the CELL-DCH state, require UE on the TS0 time slot, to monitor SIB17.Because assistant carrier frequency adopts random fashion that DCH is distributed on the different time slots, probably DCH is distributed on the TS0 of assistant carrier frequency, at this moment will cause the UE needs to support to receive two carrier frequency, the i.e. business datum of the DCH of system information on the broadcast channel of main carrier frequency time slot TS0 and assistant carrier frequency time slot TS0 simultaneously.UE must be provided with the device of the message that can receive two carrier frequency in order to receive the message of two carrier frequency in its receiving system, this has not only increased the cost of UE, and also higher to the requirement of the reception message capability of UE.
Summary of the invention
In view of this, main purpose of the present invention be to provide a kind of in the TD-SCDMA system configuration of special channel with multiple carrier frequency, this method can make UE receive only the message of a carrier frequency at one time, thereby solve UE is received the problem that message capability is had relatively high expectations.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of configuration of special channel with multiple carrier frequency, this method comprises:
A, subscriber equipment send to the mobile communication Access Network and have carried the upstream message of whether supporting shared channel information in this business;
After B, mobile communication Access Network are received this message, judge according to the information that this message is carried whether this subscriber equipment supports shared channel in this business, if, execution in step C; Otherwise the mobile communication Access Network gives the idle time slot of this subscriber equipment Random assignment respective secondary carrier frequency as this subscriber equipment dedicated channel, and this business is transmitted by the dedicated channel of distributing, and finishes this handling process;
C, mobile communication Access Network give this user equipment allocation except the idle time slot of respective secondary carrier time slot TS0 as this subscriber equipment dedicated channel, this business is transmitted by the dedicated channel of distributing.
The described upstream message of steps A is a capability information of user facility message.
The described upstream message of steps A is after the Radio Resource control connection foundation of this subscriber equipment is finished, before service bearer is set up; Perhaps existing service bearer is set up, and carries out before service bearer upgrades; After perhaps having set up service bearer, before the mobile communication Access Network is this user device applies shared channel; Send when perhaps the mobile communication Access Network requires this user equipment to report shared channel ability.
Before steps A, this method also comprises:
A1, mobile communication Access Network send the downstream message that has carried the UE capability Query Information to subscriber equipment.
Steps A 1 described downstream message is a subscriber equipment shared channel capability query message.
Described downstream message is after the Radio Resource control connection foundation of this mobile communication Access Network is finished, before service bearer is set up; Perhaps existing service bearer is set up, and carries out before service bearer upgrades; After perhaps having set up service bearer, the mobile communication Access Network is to send before this user device applies shared channel.
This method further comprises:
D, under the CELL-DCH pattern, in each subframe, support subscriber equipment demodulation time slot TS0 on main carrier frequency of shared channel on assistant carrier frequency, to receive the dedicated channel loaded service of having distributed with read system message SIB17.
When the idle time slot of the corresponding assistant carrier frequency of this subscriber equipment among the step C only had TS0, this method further comprised:
The mobile communication Access Network is given with other of this same sub-district of subscriber equipment and is not supported the subscriber equipment of shared channel to reset respective secondary carrier time slot TS0 as dedicated channel, will not support the original assistant carrier frequency time slot allocation of distributing of subscriber equipment of shared channel to give this subscriber equipment as this subscriber equipment dedicated channel to other.
Described mobile communication Access Network is the universal mobile telecommunications system Access Network.
From such scheme as can be seen, the present invention must determine at first whether this UE supports shared channel, if do not support, then according to the DCH of an idle time slot in the prior art Random assignment respective secondary carrier frequency as this UE when distributing DCH to UE; If support, then give the idle time slot of this UE distribution except respective secondary carrier time slot TS0.Like this, in same time slot TS0, UE just can not receive the dedicated service of the SIB17 of main carrier frequency time slot TS0 carrying and assistant carrier frequency time slot TS0 carrying simultaneously.Therefore, the present invention makes UE receive only the message of a carrier frequency at one time, thereby solve UE is received the problem that message capability is had relatively high expectations.
Description of drawings
Fig. 1 is the structural representation of TD-SCDMA signal in the unit interval.
Fig. 2 is for setting up the flow chart of shared channel to UE.
Fig. 3 is the overloading schematic diagram of coverage cell frequently.
Fig. 4 is an overloading of the present invention control channel collocation method flow chart frequently.
Fig. 5 is that the present invention is to the DCH schematic diagram of the time slot on the UE distribution assistant carrier frequency as this UE.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is further elaborated with reference to accompanying drawing.
In the present invention, when multi-carrier frequency cell adopted main carrier frequency to broadcast with public control, SIB17 message was not carried in the only broadcasting of the time slot TS0 in main carrier frequency of SIB17 message in the minus carrier frequency.
Fig. 4 is an overloading of the present invention control channel collocation method flow chart frequently, and its concrete steps are:
Step 400, UTRAN send UE shared channel capability query (UE CAPABILITYENQUIRY) message to UE, promptly require UE to report and whether support shared channel;
UTRAN not only can be provided with the sign whether inquiry UE supports shared channel in UE Capability Enquiry; And can in other downstream messages, carry the sign whether inquiry UE supports shared channel, be handed down to UE then;
After step 401, UE receive this message, send the message that reports UE ability information (UECAPABILITY INFORMATION) to UTRAN, whether indication supports shared channel in this business;
UE not only can be provided with whether support shared channel in UE CAPABILITY INFORMATION message; And can in other upstream message, be provided with and whether support to send to UTRAN then by shared channel;
After step 402, UTRAN receive this UE CAPABILITY INFORMATION message, judge according to being provided with of this message whether this professional UE supports shared channel, if, execution in step 404; Otherwise, execution in step 403;
Step 403, UTRAN give the DCH of the idle time slot of UE Random assignment respective secondary carrier frequency as this UE according to prior art, and this business is transmitted by the DCH that distributes;
Because UE does not support shared channel, then do not need to receive SIB17, so UTRAN does not carry out special processing to this UE with main carrier frequency time slot TS0;
Step 404, UTRAN distribute idle time slot except respective secondary carrier time slot TS0 as DCH to UE, and this business is transmitted by the DCH that distributes;
Step 405, under the CELL-DCH pattern, in each subframe, support the UE of shared channel on main carrier frequency, on assistant carrier frequency, to receive the DCH loaded service of having distributed to read SIB17 by demodulation TS0.
In whole allocation process, UTRAN can pay the utmost attention to the UE that supports shared channel and distribute except the DCH of the idle time slot of the assistant carrier frequency of assistant carrier frequency time slot TS0 as this UE.If in a sub-district, except other assistant carrier frequency time slot of assistant carrier frequency time slot TS0 has all been distributed to other UE, only be left assistant carrier frequency time slot TS0 when distributing DCH for now the UE that supports shared channel, then UTRAN does not support the UE of shared channel to carry out the DCH setting again to other, promptly do not support the UE of shared channel assistant carrier frequency time slot TS0 to be set, and will not support the original assistant carrier frequency time slot allocation of distributing of UE of shared channel to give the UE of support shared channel DCH to other as the UE of this support shared channel as DCH to other.
Like this, just avoided supporting the interior at one time message that receives on two carrier frequency of UE of shared channel, UE has been received the problem that message capability is had relatively high expectations thereby solve.
In step 400 of the present invention, UTRAN can send the downstream message that is provided with the inquiry sign under a lot of opportunitys, include but not limited to following several: after RRC sets up, before service bearer (RB RadioBearer) is set up; Existing RB Radio Bearer, but before carrying out RB Radio Bearer renewal; After having set up RB Radio Bearer, before UTRAN is UE application shared channel.
Step 400 of the present invention also can be omitted.
In the step 401 of the present invention, UE can send under a lot of opportunitys and be provided with the upstream message of whether supporting shared channel, includes but not limited to following several: when UE initiates the RRC connection request; After the RRC connection is set up and is finished, before RB Radio Bearer sets up; Existing RB Radio Bearer, but before carrying out RB Radio Bearer renewal; After having set up RB Radio Bearer, before UTRAN is UE application shared channel; When UTRAN requires UE to report the shared channel ability.
Of the present inventionly also can substitute UTRAN with other mobile communication Access Networks.
Time slot is as the DCH schematic diagram of this UE on the assistant carrier frequency for the present invention distributes to UE for Fig. 5, and as shown in the figure: the follow-up descending time slot TS4 of assistant carrier frequency, TS5, TS6 have all distributed to UE1, UE2 and UE3, and assistant carrier frequency descending time slot TS0 also has surplus resources.Suppose that UE3 does not support shared channel.Put aside ascending time slot.This stylish to the UE4 of support shared channel need distribute DCH, UTRAN redistributes the DCH of the assistant carrier frequency time slot of UE3 as this UE3, both with the DCH of assistant carrier frequency time slot TS0 as this UE3.UTRAN distributes to the UE4 transport service with assistant carrier frequency time slot TS4 as the DCH of UE4 then.Through satisfying a principle after reshuffling: the DCH that distributes for the UE that supports shared channel is not on TS0.
By the present invention, under overloading frequency situation, need the UE of the CELL-DCH of use shared channel needn't receive two frequencies simultaneously, reduced the complexity of terminal greatly.
The above only is the good embodiment in school of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.