CN1567773A - Method for paging MBMS in wideband TDD mobile communication system - Google Patents
Method for paging MBMS in wideband TDD mobile communication system Download PDFInfo
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Abstract
The invention is a calling MBMS method used in wide-band time division diplex mobile communication system, after receiving GGSN-sent data, SGSN sends MBMS notice to RNC; after receiving the MBMS notice, RNC constructs wireless network controller and two continuous frames of base-station interface frame protocol according to the content of the notice, where the frame protocol contains MBMS indication bit, calling indication and calling message; RNC transmits a frame of the frame protocol to base station; after receiving the frame, the base station firstly checks the indication bit: if the indication bit is 0, it shows the frame is tradition calling and if the indication bit is 1, it shows the frame contains MBMS service message; the base station checks the calling indication bit: if the indication bit is 1 and MI is 1, it uses the unused 4 retained bits in each PICH to bear MBMS service calling indication.
Description
Technical field
The present invention relates to Wideband Code Division Multiple Access (WCDMA) (being called for short WCDMA) mobile communication system, be in Wideband Code Division Multiple Access (WCDMA) (the be called for short WCDMA) mobile communication system in the wideband time division duplexing pattern specifically, the method of paging multimedia broadcasting and multicast service (being called for short MBMS), wherein mainly be to have provided how to utilize the reservation bit in several Page Indication Channel frame structures that continue in the existing paging block, come the method for the paging indication of MBMS transmission business.
Background technology
At present, third generation partner plan (hereinafter to be referred as 3GPP) is carried out standardization to multimedia broadcasting and multicast service (hereinafter to be referred as MBMS), the MBMS business be in the 3G (Third Generation) Moblie that promptly will dispose the new business that can provide, it is a kind of one way traffic of point-to-multipoint, and the maximum characteristics of this business are that it can effectively utilize Radio Resource and Internet resources.
Fig. 1 has described the system configuration of MBMS, mainly comprise Radio Access Network part and core network part, wherein wireless access partly comprises subscriber equipment (being called for short UE) 105 and UMTS Terrestrial radio access network (being called for short UTRAN) 104, interface between them is called air interface Uu107, and its function is for the wireless access transport service is provided between subscriber equipment and the core network; Core network partly is included as the MBMS system provides the broadcasting and the multicast service center (being called for short BM-SC) 101 of professional control, Gateway GPRS Support Node (being called for short GGSN) 102 that constitutes the MBMS STN and main Serving GPRS Support Node (being called for short SGSN) 103.And preservation and subscriber-related attribution data location register (being called for short HLR) 106; In addition, 108Iu represents the interface between wireless access network and the core net, and it is the interconnection reference point between wireless access network and the core net.It should be noted that other parts formation base domain except that UE (being called for short IF), and the professional used Radio Resource of MBMS not user's special use, but share by all users of this business of use.
Fig. 2 has described the flow process of MBMS multicast service, and wherein " subscription " 200 is used to set up the contact between subscriber equipment and the service provider, and authorized user can receive relevant MBMS service.
" card " 201 is used for the business that notifying user equipment will provide.
" adding " 202 expression users add a group, promptly subscriber equipment tell network he wish to receive this multicast service.
" carrying of MBMS multicast pattern is set up " 203 set up Internet resources for the MBMS transfer of data.
" MBMS notice " 204 is used for the MBMS business that the notifying user equipment data are about to transmission.
" transfer of data " 205 expression MBMS business data transmission are to the process of subscriber equipment.
" carrying of MBMS multicast pattern discharges " 206 represented after the MBMS business data transmission is finished releasing network resources.
" leave " 207 expression subscriber equipmenies and will leave a group, promptly do not rethink and receive certain professional data.
Sketch in the mobile communication system (hereinafter to be referred as WB-TDD) of wideband time division duplexing pattern the basic mode and existing Page Indication Channel (PICH) frame structure of existing paging below respectively with reference to Fig. 3 and 4.
In the WB-TDD system, existing paging is a kind of paging of the point-to-multipoint based on the user, its basic framework as shown in Figure 3:
Whether user equipment registration is behind the UTRAN network, and UTRAN can be mapped to a paging group to this user Equipment, and notify this user Equipment by the UTRAN paging with a paging indication (being called for short PI) 304.If UTRAN paging subscriber equipment, the paging indication 304 corresponding to this subscriber equipment can periodically appear on the Page Indication Channel (being called for short PICH) 302 so.
Subscriber equipment has adopted the mode of discontinuous reception (being called for short DRX) to monitor the paging indication 304 that whether has self on PICH, if subscriber equipment detects the paging indication (PI) that has self, this subscriber equipment can begin to receive concrete beep-page message from auxiliary public control physical channel (being called for short SCCPCH) 301 so, that is to say, only carried paging indication information on the PICH, and beep-page message is carried by SCCPCH.Detailed explanation for beep-page message is the protocol layer function of UE high level.Parameters such as cycle about discontinuous reception are prenoticed to subscriber equipment by UTRAN, and said herein discontinuous reception (being called for short DRX) mode is meant that subscriber equipment is under idle pulley, do not receive information and only when the UTRAN of defined discontinuous receiving cycle length condition satisfies, just detect the paging indication, determine whether receiving the paging information that on SCCPCH, is carried subsequently according to above-mentioned paging indication, mode by this, subscriber equipment is owing to there being smaller power consumption to arrive purpose of power saving.
In a word, subscriber equipment is periodic to the monitoring of paging indication, and the size in its cycle is decided by core network and tells subscriber equipment by the message of relevant Radio Resource control (RRC); If should the cycle big more, to wake chance up from sleep more little for subscriber equipment (UE) so, and its power consumed is more little, and then prolongs the battery stand-by time of subscriber equipment, and its weak point has been to reduce terminal to the reaction speed from the core network paging.
Fig. 4 has provided in the WB-TDD system, the structure of a paging block (paging Block), and it is by N
PICHContinuous Page Indication Channel (PICH) frame of individual logic is formed, and each PICH goes up bearing call indication P
0..., P
NPI-1N wherein
PICHDefined in the corresponding message in the Radio Resource control TS25.331 of 3GPP agreement, for example its value may be 2 and 4.For WB-TDD, its each radio frames (10ms) is made up of 15 time slots, and can transmit PICH in the time slot within each radio frames according to 3GPP standard TS25.221.
Fig. 5 has provided the frame structure of the Page Indication Channel (PICH) in the WB-TDD system.Page Indication Channel is one and is used for the bearing call indication pure physical channel of (being called for short PI), is described in detail at 3GPP standard TS 25.221 v5.3.0.The frame structure that has two types in WB-TDD is called Class1 and type 2 respectively, and their difference is the length difference of intermediate channels pilot code Midamble.These two kinds of frame structures can bearing call indication PI.Wherein in the frame structure of Class1, there are 240 bits to indicate by bearing call, i.e. N
PIB=240, in the frame structure of type 2, there are 272 bits to indicate by bearing call, i.e. N
PIB=272.Especially it should be noted that as seen from Figure 5 in two kinds of frame structures the S adjacent with midamble
NPIB+1..., S
NPIB+44 bits all keep, be not used to transmit any effective information.
Each paging indication P
qForm by several symbols, use L
PIThe expression symbolic number, a symbol comprises 2 bits, is mapped to { the S in this time slot
2Lpi*q+1..., S
2Lpi* (q+1)Bit.In addition, adopt transmission manner at interval, half bit that is about to constitute each paging indication is placed on first data segment on the PICH, and second half bit is placed on second data segment on the PICH, obtains diversity gain by this.
Fig. 6 provides as each paging indication P
qInterval mapping situation when forming by 4 symbols.
According to 3GPP TS25.221 technical specification, each paging indication P
qSymbolic number L
PICan be 2,4 or 8.A radio frames can be transmitted N
PIIndividual paging indication.The paging indicated number N that each radio frames is transmitted
PI, the shared symbolic number L of each paging indication
PIAnd frame type provides by high-level signaling.
Therefore, can know that each paging indicator collet can transmit N altogether
P=N
PICH* N
PIIndividual paging indication.
Particularly, according to 3GPP TS25.304 defined, for certain user equipment (UE),, adopting following manner to calculate its pairing paging and indicate PI, the span of PI is 0 ..., N
P-1.
PI＝(IMSI?div?8192)mod?Np
Wherein IMSI is user's a sequence number, and above-mentioned PI (PI=0 ..., N
P-1) q indication P in n the frame in the paging indicator collet that the activationary time of corresponding UE is given
qQ=PImod N wherein
PI, n=PI div N
PI, mod represents to get surplus operation, and div represents to round operation.
The MBMS service paging is a kind of group paging of the point-to-multipoint based on business.At the WB-FDD system, Chinese patent application 02130568.4 has proposed a kind of MBMS service paging method, but in the WB-TDD system, how to realize the MBMS service paging, does not also have correlation technique so far.
According to 3GPP TS25.211 technical specification, for WB-FDD, adopt a Page Indication Channel frame (PICH) to come the bearing call indication, and have 12 reservation bits can be used to carry the paging indication of MBMS business in each Page Indication Channel frame; Yet according to 3GPP TS25.221 technical specification, for the WB-TDD system, its Page Indication Channel frame structure is different with the Page Indication Channel frame structure of WB-FDD, promptly constitute a paging block and come the bearing call indication by several Page Indication Channel frames, in existing standard 3GPP TS25.221, in each Page Indication Channel frame 4 reservation bits are only arranged, so, can not directly MBMS service paging method in the WB-FDD system be used for the WB-TDD system.In WB-TDD, because existing paging is based on the paging of user's point-to-multipoint, therefore, realize the group paging based on the point-to-multipoint of MBMS business, will be to existing beep-page message, Page Indication Channel frame, paging, the action correct of UE and base station etc.Modification for beep-page message can but how to carry the MBMS paging on existing Page Indication Channel frame be indicated with reference to the method for WB-FDD, and new method must be provided.
Summary of the invention
The purpose of this invention is to provide a kind of in the WB-TDD system, the method of paging multimedia broadcasting and multicast service (being called for short MBMS), its core is to utilize the reservation bit in several Page Indication Channel frame structures that continue in the existing paging indicator collet, transmits the paging indication of imminent MBMS service identification.
For achieving the above object, a kind of method that is used for broad band time division duplex mobile communication system paging MBMS comprises step:
(a) after SGSN receives the data of GGSN transmission, send the MBMS notice to RNC;
(b) after RNC received described notice from SGSN, according to the composition of content radio network controller of described notice and two successive frames of base-station interface Frame Protocol, described Frame Protocol comprised indicating bit, paging indication and the beep-page message of MBMS;
(c) RNC sends to the base station to the frame of described Frame Protocol;
(d) base station receives after the frame of described Frame Protocol, at first check indicating bit described in the frame of the described Frame Protocol receive, if described indicating bit is 0, the frame of then representing described Frame Protocol is traditional paging, if described indicating bit is 1, then represent to have comprised in the frame of described Frame Protocol the business information of MBMS;
(e) the paging indicating bit in the described frame is checked in the base station, if described be designated as 1 and MI be 1, utilizing among each PICH not so, 4 of usefulness reservation bits carry the indication of MBMS service paging, if described indication PI is 0, the MBMS beep-page message is read to make up the auxiliary public control physical channel of MBMS beep-page message in the base station;
(f) the base station SCCPCH frame that sends the paging block carry the paging indication and carry beep-page message reads for user equipment (UE);
(g) UE checks and specifies the pairing PICH frame of frame number SFN0+n; If UE has activated the MBMS business, then will read frame number is in the PICH frame of SFN0+m_n, and near 4 bits the middle pilot code determine whether the business of current institute paging is that it is needed;
(h) UE analyzes the MBMS beep-page message on the SCCPCH, makes corresponding up response according to the concrete indication in the described message.
The present invention has made full use of the paging resource in the existing system, utilizes in the existing paging block in the Page Indication Channel not that the reservation bit of usefulness carries the MBMS business, without any influence, makes system have good backwards compatibility to existing paging.Under the situation that realizes new paging function, make the power consumption of terminal minimum, increased the stand-by time of terminal equipment as much as possible.Among the present invention, UE has adopted discontinuous receive mode to the reception of MBMS paging, can reduce the power consumption of terminal.In addition, MBMS paging proposed by the invention has utilized existing discontinuous receiving cycle (in each cycle, UE will wake up and read the PICH channel), and is unnecessary at the new discontinuous receiving cycle of MBMS design, thereby, do not increase the wake-up times of UE.MBMS paging among the present invention is the group paging of a kind of point based on business to multiple spot, has improved paging efficiency and to utilization ratio of wireless resources.
Description of drawings
Fig. 1 is a MBMS system configuration schematic diagram;
Fig. 2 is a MBMS multicast service flow process;
Fig. 3 is the process of existing paging;
Fig. 4 is the structure of paging block among the WB-TDD;
Fig. 5 is the structure of PICH frame among the WB-TDD;
Fig. 6 is paging indication (PI) interval Mapping Examples (the symbolic number LPI=4 that each PI is shared) on PICH;
Fig. 7 A is the example of carrying MBMS paging indication scheme one;
Fig. 7 B is the example of carrying MBMS paging indication scheme two;
Fig. 7 C is the example of carrying MBMS paging indication scheme three;
Fig. 8 is a MBMS call signaling flow process;
Fig. 9 is a UTRAN paging handling process;
Figure 10 is the paging handling process of base station (Node B);
Figure 11 is the basic operation flow process of UE;
Embodiment
The present invention proposes in the WB-TDD system method of a kind of paging multimedia broadcasting and multicast service (being called for short MBMS).Its core is how to utilize the reservation bit in several Page Indication Channel frame structures that continue in the existing paging indicator collet, transmits the method for the paging indication of imminent MBMS business.
How utilizing the reservation bit in several Page Indication Channel frame structures that continue in the existing paging indicator collet, transmit the method for the paging indication (being called for short MPI) of imminent MBMS business, is emphasis of the present invention, below we will describe in detail.
For with existing 3GPP standard in the variable that adopts in the paging mode based on user's point-to-multipoint distinguish mutually, use the variable of taking the lead to identify the variable that uses in the MBMS paging below the present invention with m_.
From Fig. 5, can know in the current Page Indication Channel frame, the sNPIB+1 adjacent with middle pilot code midamble ..., the sNPIB+44 bit keeps not to be used.Therefore, the present invention utilizes these reservation bits to transmit the indication of MBMS service groups.
In the WB-TDD system, 2 two kinds of frame structures of Class1 and type all can be used for bearing call information, and all have the reservation of 4 bits not use in these two kinds of frame types.Therefore, the frame of two kinds of structures of Class1 and type 2 all can be used to the indication of MBMS transmission service paging.In addition, because it is identical to be used to carry the bit number of MBMS paging indication, so also can not be identical in each paging frame in each paging block with the method for bit carrying MBMS paging indication.So in the present invention, if indeterminate explanation, method then of the present invention all is fit to this frame structure of two types.
(1) design of the bit number that takies of MPI
In each Page Indication Channel frame (PICH), only there are 4 bits to can be used for carrying MBMS paging indication MPI, if suppose the bit number m_L that each MPI is shared
PI=L
PI, promptly using value based on the paging indication parameter of user's point-to-multipoint, a paging frame (PICH) only can transmit 1 MPI so, and therefore the MBMS paging indication (MPI) that can carry simultaneously of paging block institute is several less.So for MBMS paging indication, the present invention does not adopt the regulation of current standard at common paging PI, and gives the parameter value that makes new advances, and promptly defines m_L
PIBe 1,2 or 4 bits, MBMS paging indicated number m_N that paging frame can transmit so
PIBe respectively 4,2,1.If a paging indicator collet comprises m_N
PICHIndividual lasting frame, its total MBMS paging indicated number m_N that can transmit so
PFor:
m_N
P＝m_N
PICH*m_N
PI
When table 1 is listed each paging indication (MPI) and is taken different bit numbers, the paging indicated number (m_N that each Page Indication Channel frame (PICH) can transmit
PI).
When each MPI of table 1. takies different bit number, the paging indicated number that each PICH can carry
| The bit length m_L of a paging indication PI | ????1 | ????2 | ????4 |
| Paging indicated number m_N PI | ????4 | ????2 | ????1 |
The design of above-mentioned MPI bit number mainly considers to carry as far as possible many MPI numbers in a paging block.Can but the transmission reliability of each MPI guarantee? we know that the bit number that each MPI takies is many more, and the transmission reliability of MPI is also strong more so.Indicating the bit number of PI as each point-to-point paging of current standard defined can be 8 or 16.For the paging indication of MBMS,, if make the bit number m_L of single MPI so owing to only have 4 bits to can be used for carrying MPI on each PICH
PICan be 8 or 16, so just must break through the restriction that the original bit of forming a paging indication must carry on a PICH, promptly allow to form the bit distribution of a MPI in different PICH frames.
If bit distribution that allow to form a MPI is in different PICH frames, when the frame number of the PICH that comprises when a paging block is 2 so, the bit number m_L of MPI
PICan be 8; When the frame number of the PICH that comprises when a paging block is 4, the bit number m_L of MPI
PICan be 8 and 16.
Must understand method proposed by the invention for better, the implication of some key symbols that use among the present invention is as follows:
M_N
PICH: the PICH frame number that paging block comprised.
M_N
PI: the number of the MBMS paging indication that each PICH frame can carry.
M_L
PI: the shared bit number of each MBMS paging indication.
M_Np: the MBMS service paging indicated number that each paging block can transmit.
(2) addressing method of paging indication
In order to reduce the power loss of UE as far as possible, similar with common point-to-point paging, paging for the MBMS business, also support user discontinuous (DTX) to receive, be that UE uses the same activationary time (Paging Occasion) and the computational methods of activationary time to monitor MBMS service paging and the common point-to-multipoint paging based on the user, thereby can reach the purpose that reduces the user power loss.
In the WB-TDD system, each user monitors Page Indication Channel according to activationary time (Paging Occasion), and activationary time has provided the pairing system frame number SFN 0 of first frame in the paging block, computational methods such as formula (1)
SFN0＝Paging?Occasion＝{(IMSI?div?K)mod(DRX?cycle?length?div
PBP)}*PBP+n*DRX?cycle?length+Frame?Offset????????(1)
In the formula (1), IMSI is user's a sequence number, DRX cycle length is the cycle (being represented by the physics frame number) of the discontinuous reception of this user, and PBP is the cycle (PagingBlock Periodicity is referring to TS25.304) of a paging block, Frame Offset is vertical shift, K is the number of the auxiliary public control physical channel (SCCPCH) of bearing call message (PCH), n=0,1,2..., satisfy the System Frame Number of SFN0 less than maximum.PBP and Frame Offset are given by system information.
Because the MBMS paging is based on the group paging of service identification (Service-ID), therefore the computational methods of position (subscript of MPI) m_PI corresponding in each paging block are indicated in the MBMS paging, different with common point-to-multipoint paging, should be according to the identification number (Service-ID) of MBMS business, rather than user's sequence number IMSI calculates.
For example number calculate as the MBMS service identification with TMGI.
The span of m_PI is 0 ..., m_N
P-1, calculate by following formula:
m_PI＝(TMGI?div?8192)mod?m_Np???????(2)
m_Np＝m_N
PICH*m_N
PI???????????(3)
Div is for rounding operation in the formula (2), and m_Np is the sum of each paging block MPI that can transmit.
For certain user equipment (UE), the subscript m _ PI of high-rise paging indication of calculating supposes m_q paging indication in m_n the frame in the corresponding paging indicator collet.Work as m_L
PIDuring smaller or equal to 4 bits, m_q and m_n calculate as follows:
m_q＝m_PI?mod?m_N
PI????????????(4)
m_n＝m_PI?div?m_N
PI.???????????(5)
Wherein div is for rounding operation, and mod is for getting surplus operation.M_N
PIIt is the MPI number that a PICH frame can carry.
When the bit number m_LPI of paging indication MPI equals 8 or 16 bits, value such as the table 2 of m_q and m_n.
When table 2. is 8 or 16 bits as the bit number m_LPI of paging indication, the value of m_q and m_n
| m_N PICH | ?m_L PI | ?m_N PI | m_Np | ?m_q | ??m_n |
| 2 | ?8 | 1 | ?0 | ??1，2 | |
| 4 | ?8 | ?1 | 2 | ?0 ?1 | ??0，1(m_q ??＝0) ??2，3(m_q ??＝1) |
| 4 | 16 | ?1 | 1 | ?0 | ??1，2，3，4 |
For example, work as m_N
PICHBe 4, when promptly a paging block comprises 4 calling indicating frame (PICH), always have 16 bits and can be used for MBMS transmission paging indication, select m_L
PIBe 8 bits, this paging block can transmit 2 pagings indications so, and by formula (2) must m_PI be 0 or 1, and by formula (3) must m_q be 0 or 1; When m_q was 0, m_ n was 0 and 1, showed user interested first and second frame in should the paging receiving piece, and promptly the frame number of activationary time correspondence is SFN0 frame and its next frame SFN0+ 1; When m_q was 1, m_n was 2 and 3, showed user interested third and fourth frame in should the paging receiving piece, and promptly the activationary time corresponding sequence number is SFN0+2 frame and its next frame SFN+3;
In the above-mentioned table 2, work as m_N
PICHBe 4, m_L
PIBe 8 bits, the value of corresponding m_q, the another kind of value mode of m_n is: m_n=2,3 work as m_q=1; M_n=0,1 works as m_q=1;
So table 2 only is the bit number m_L when the paging indication
PIWhen being 8 or 16 bits, a kind of example of the value of m_q and m_n is not as restriction of the present invention.
The paging indicated number m_N that each PICH frame in each sub-district is carried
PI, the shared bit number m_L of each paging indication
PI, and frame type is given by high-level signaling.UE can obtain these information by system information broadcast or other signaling.
The value of m_n may be different from n (frame position in the paging block of general paging correspondence), if their value difference, then to the professional users interest of MBMS, should monitor a System Frame Number in the paging block simultaneously and be (SFN0+n) and (SFN0+m_n) pairing paging frame (PICH).
(3) coding method of MBMS paging indication
MBMS paging indication MPI
p(comprising several bits), p=0 ..., m_N
PI-1, MPI
p∈ 0,1}, indication and MPI
pWhether the transfer of data of related MBMS business is about to takes place.
Supposing has N in each PICH frame
PIB=m_N
PI* m_LPI bit e
i, i=1 ..., N
PIB, the group paging indication that is used to transmit the MBMS business, the coded system of these bits is as shown in table 3.
The coded system of table 3:MBMS paging indication bit
| ??MPI p | Bit { e m_Lpi*p+1， ??e m_Lpi*p+2，...，e m_Lpi*(p+1)} | Implication |
| ????0 | ????{0，0，...，0} | Do not need to receive the SCCPCH of bearing call message |
| ????1 | ????{1，1，...，1?} | Need to receive the SCCPCH of bearing call message |
(4) three kinds of selection schemes of carrying MBMS paging indication
When reality was used, based on different principles, the method for carrying MBMS paging indication can have following three kinds of selection schemes:
(scheme one)
Each paging frame in paging block transmits same paging indication (MPI), and promptly all possible paging indication MPI can be carried on a PICH.The bit number m_L of each MPI
PIValue can be 1,2, total MPI that 4, one paging blocks can carry counts m_N
P=m_N
PIThe relevant position of MPI is calculated in by formula (1)-(4).Need not calculate m_n.
The advantage of this scheme is that UE only need monitor a PICH frame at each activationary time, and promptly System Frame Number is the PICH frame of SFN0+n, so the power loss of UE is minimum.Shortcoming be a paging block the paging indicated number (MPI) that can carry simultaneously less, i.e. m_N
P=m_N
PIThe professional number of MBMS of the suitable needs of this scheme paging simultaneously is less, and the power loss of UE is an important factors.
Fig. 7 A provides an example of this scheme, supposes that a paging block comprises 4 PICH frames, all carries MPI on each PICH
0... MPI
M-1MPI is indicated in m MBMS paging altogether.So the MPI number that the paging block among the described figure carries altogether is m.
(scheme two)
Each paging frame in paging block transmits different paging indications (MPI), but the bit that constitutes a paging indication can not be distributed in different frame, i.e. the bit number m_L of each MPI
PIValue only can be 1,2,4, can not get 8 and 16.Total MPI that paging block can carry counts m_Np=m_N
PICH* m_N
PIThe relevant position of MPI is calculated in by formula (1)-(5), and it is the PICH frame of SFN0+n and SFN0+m_n that UE needs the monitoring system frame number at each activationary time.
N and m_n may be identical, also may be different, so UE need monitor 2 PICH frames at most at each activationary time.With regard to the power loss of UE, this scheme is the compromise of scheme one and scheme three.
Fig. 7 B provides an example of this scheme, supposes that a paging block comprises 4 PICH frames, and each PICH can carry m MPI, and so as shown in the figure, first PICH goes up carrying MPI
0... MPI
M-1, second PICH goes up carrying MPI
m... MPI
2m-1, the 3rd PICH goes up carrying MPI
2m... MPI
3m-1, the 4th PICH goes up carrying MPI
3m... MPI
4m-1MBMS paging indication MPI.So the MPI number that the paging block among the described figure can carry altogether is 4m.
(scheme three)
Each paging frame in paging block transmits different paging indications (MPI), and the bit that constitutes a paging indication can be distributed in different frame, i.e. m_L
PIValue can be 1,2,4,8 and 16.The PICH frame number that UE may monitor at most at each activationary time is 4.Work as m_L
PIValue be 1,2,4, similar with scheme two, the addressing of MPI is calculated according to formula (1)-(5).Work as m_L
PIBe 8 and 16, value such as the table 2 of m_q and m_n.
The advantage of this scheme is flexibly, m_L
PISpan more.Work as m_L
PIBe set at 8 and 16, the reliability of the transmission of MPI is higher, but this moment UE power loss also bigger comparatively speaking, and definite need of m_q and m_n undertake by the mode of table 2, can not utilize formula (5) again.
Fig. 7 C provides an example of this scheme when a shared bit number of MPI is 8.In described figure, suppose that a paging block comprises 4 PICH frames, because the shared bit number of each MPI is 8, so first goes up carrying MPI with second PICH
0, the 3rd and the 4th the last carrying of PICH MPI
1, the MPI number that described paging block can carry altogether is 2.
For above-mentioned three kinds of schemes, as the shared bit number m_L of a given MPI
PIAfter, the coded system of MPI, the computational methods of activationary time all are the same, and be different only in definite method of m_q and m_n.
With reference to accompanying drawing, with the signaling process to the MBMS paging relevant with the present invention, UTRAN, base station and UE are illustrated the handling process of paging below.The present invention only describes understanding and applying the invention necessary part, in order to give top priority to what is the most important other part is omitted to some extent.
Fig. 8 is the signaling process figure of MBMS paging.
In 801 stages of described figure, GGSN (ggsn) sends the MBMS data or is notified to SGSN (main service universal grouping wireless business supporting node);
802 stages of described figure after SGSN receives described MBMS data, send " MBMS notice " message, information such as the identification number (for example TMGI) of the MBMS business that notice RNC (radio network controller) data will soon be transmitted and coverage.
In 803 stages of described figure, after RNC received described " MBMS notice ", request SGSN set up the RAB between described RAN and the SGSN.
In 804 stages of described figure, after described RAB set up, RNC sent " MBMS paging " and gives UE, and the MBMS transfer of data that notice UE will carry out at once also may comprise counting indication and radio bearer parameter etc.
805 stages of described figure if UE is in idle pulley when receiving beep-page message, and requires UE to enter into connection mode or require UE to carry out up response in the message, UE will initiate Radio Resource control (being called for short RRC) establishment of connection process.If UE is at the RRC connection mode, this process no longer needs.
In 806 stages of described figure, UE sends page response to RNC according to the particular content of beep-page message.Certainly, also may not send page response, to reduce up signaling according to beep-page message.
In 807 stages of described figure, RNC sends page response to SGSN, and SGSN is sent to GGSN with this response again, and in some cases, this message can not send yet.
Fig. 9 describes MBMS paging in the UTRAN.
In 901 stages of described figure, SGSN sends " MBMS notice " message and gives RNC;
902 stages of described figure, after RNC receives described " MBMS notice ", will be according to the information such as MBMS service identification in " MBMS notice ", two PCH IubFP frames that structure continues;
In 903 stages of described figure, the PCH IubFP frame that RNC is good with structure sends to relevant base station.
904 stages of described figure, after PCH IubFP frame is received in base station (Node B), according to the structural scheme of PICH frame in the previously selected paging block (can be in three kinds of schemes proposing of the present invention any, in this supposition selection scheme 2), content according to PCH IubFP frame, each PICH frame of contexture paging block, and associated SCCPCH.Paging block is made up of several PICH frames, wherein comprises MPI paging indication in each PICH frame; (how according to PCH IubFP structure paging block, and associated SCCPCH, below Figure 10 and relevant explanation will further introduce);
In 905 stages of described figure, base station (Node B) will construct good paging block (comprising several PICH frames), with the relevant SCCPCH of paging block therewith, in the corresponding time slot transmission of the system-frame of appointment; Because the UEs of institute's paging supports non-lasting monitoring, so the base station in certain time interval, repeats to send described paging block and SCCPCH possibly, can both receive to guarantee all users interest.
906 stages of described figure, UE is at activationary time (SFN0), check that System Frame Number is the PICH (common point-to-point paging) of SFN0+n in the corresponding paging block, with System Frame Number is 4 bits that link to each other with middle pilot code (midamble) in the PICH frame of SFN0+m_n, the paging indication MPI corresponding according to the identification number (for example TMGI) of its interested MBMS business, whether the business of judging institute's paging is that it is needed, if it can continue to receive the beep-page message of SCCPCH to obtain to be carried on the SCCPCH.
907 stages of described figure, UE analyzes the beep-page message (identification number of the MBMS business that carrying is actual, TMGI for example), mate according to the identification number (for example TMGI) of its interested MBMS business and the identification number of the MBMS business in the beep-page message, if their unanimities, UE further be sure of the professional transmission soon of own interested MBMS so, it is again according to other indication in the beep-page message then, for example counting indication, determine whether response count request, perhaps also may set up radio bearer and send page response (908) to RNC etc.
Figure 10 has described the handling process of base station to each PCH IubFP frame.
1001 of described figure, the base station receives PCH IubFP frame;
1002 of described figure after PCH IubFP frame is received in the base station, checks the MI position in the PCH IubFP frame;
1003 of described figure judges whether MI is 1, if MI ≠ 1 represents that then this PCH IubFP frame is traditional paging, it doesn't matter with MBMS, forwards 1004 stages of described figure to, promptly handles PCH IubFP according to existing paging; If MI=1 then represents to comprise the MBMS paging information in the load (payload) of this frame, then after handling common beep-page message, change 1005 of described figure;
1005 of described figure, the paging Warning Mark PI position in the PCH IubFP frame is read in the base station;
1006 of described figure, if PI=I, illustrate that then the PCH IubFP frame when pre-treatment comprises MBMS paging indication bitmap, so according to one of three kinds of schemes of the previously selected the present invention of system, information according to MBMS paging indication bitmap (PI bitmap), make up 4 bits that link to each other with middle pilot code (midamble) among each PICH in the paging block, i.e. 1007 of described figure structure PICH; If PI=0 illustrates that then the PCH IubFP frame when pre-treatment does not comprise MBMS paging indication bitmap, but comprises the MBMS beep-page message;
1008 of described figure, according to the beep-page message on the PCH IubFP, structure SCCPCH.
Last base station sends the paging block and the beep-page message SCCPCH frame that carry the paging indication and reads for user terminal.
Figure 11 has described UE and has monitored the basic process of paging indication.(mode of supposing carrying MBMS paging indication is the scheme two among the present invention, and supposes that described UE is in idle condition, and interested in the MBMS business).
In 1101 stages of described figure, UE is according to the activationary time of formula (1) gained, i.e. Cell System Frame Number SFN0 judges whether that this reads PICH.If current System Frame Number and SFN0 are inconsistent, then UE continues to keep dormancy; Otherwise, changed for 1102 stages over to;
In 1102 stages of described figure, UE calculates point-to-point paging indication PI according to IMSI, and according to MBMS service identification number (for example TMGI) and the m_Np that preserved, by formula (2) calculate m_PI (being expressed as MPI among the figure);
In 1103 stages of described figure, UE calculates q and n according to the PI of gained; According to the m_PI of gained, calculate m_q and m_n according to formula (4) and (5);
In 1104 stages of described figure, frame number is the PICH frame of SFN0+n and SFN0+m_n in the UE monitoring system paging block, and n and m_n may be identical.
In 1105 stages of described figure, UE check system frame number is q PI indication among the PICH of SFN0+n, judges whether it is 1; If be 1, show that then there is point-to-point paging in system to UE, UE should receive the SCCPCH of the point-to-point beep-page message of carrying, otherwise changes for 1106 stages;
In 1106 stages of described figure, UE check system frame number is m_q MPI indication among the PICH of SFN0+m_n, judges whether it is 1; If be 1, then show the professional transmission soon of the interested MBMS of UE, UE should receive the SCCPCH of carrying MBMS beep-page message.
In 1107 stages of described figure, UE analyzes the MBMS beep-page message on the SCCPCH, makes respective response according to the content of message, for example initiates the Radio Resource control connection and sets up request etc.
Claims (17)
1. method that is used for broad band time division duplex mobile communication system paging MBMS comprises step:
(a) after SGSN receives the data of GGSN transmission, send the MBMS notice to RNC;
(b) after RNC received described notice from SGSN, according to the composition of content radio network controller of described notice and two successive frames of base-station interface Frame Protocol, described Frame Protocol comprised indicating bit, paging indication and the beep-page message of MBMS;
(c) RNC sends to the base station to the frame of described Frame Protocol;
(d) base station receives after the frame of described Frame Protocol, at first check indicating bit described in the frame of the described Frame Protocol receive, if described indicating bit is 0, the frame of then representing described Frame Protocol is traditional paging, if described indicating bit is 1, then represent to have comprised in the frame of described Frame Protocol the business information of MBMS;
(e) the paging indicating bit in the described frame is checked in the base station, if described be designated as 1 and MI be 1, utilizing among each PICH not so, 4 of usefulness reservation bits carry the indication of MBMS service paging, if described indication PI is 0, the MBMS beep-page message is read to make up the auxiliary public control physical channel of MBMS beep-page message in the base station;
(f) the base station SCCPCH frame that sends the paging block carry the paging indication and carry beep-page message reads for user equipment (UE);
(g) UE checks and specifies the pairing PICH frame of frame number SFNO+n; If UE has activated the MBMS business, then will read frame number is in the PICH frame of SFNO+m_n, and near 4 bits the middle pilot code determine whether the business of current institute paging is that it is needed;
(h) UE analyzes the MBMS beep-page message on the SCCPCH, makes corresponding up response according to the concrete indication in the described message.
2. method according to claim 1 is characterized in that described step (f) also comprises step:
In order to support the non-lasting reception of UE, this paging block and corresponding SCCPCH frame will be repeated to send in the base station in the regular hour;
3. method according to claim 1 is characterized in that described step (e) also comprises:
Each paging frame in paging block do not use 4 bits, transmit same paging indication (MPI), the bit number m_L that each MPI takies
PIValue can be 1,2,4, n=m_n, a paging block the paging indicated number m_N that can carry simultaneously
P=m_N
PI
4. method according to claim 3 is characterized in that, interested UE only monitors calling indicating frame PICH in the paging block relevant with SFNO at each activationary time;
5. method according to claim 3 is characterized in that, the bit number m_L that each MPI takies
PIValue determine that by high level terminal (UE) can obtain by system information or high-level signaling.
6. method according to claim 1 is characterized in that described step (e) also comprises:
Each paging frame in paging block transmits different paging indications, but the bit that constitutes a paging indication can not be distributed in different frame, i.e. m_L
PIValue be 1,2,4, one paging blocks the paging indicated number m_Np=m_N that can carry simultaneously
PICH* m_N
PI
7. method according to claim 6 is characterized in that the position of described MPI in paging block, calculates according to formula (1)-(5).
8. method according to claim 6 is characterized in that, interested UE monitors 2 PICH frames at most at each activationary time.
9. method according to claim 6 is characterized in that, it is the frame of SFNO+n and the frame of SFNO+m_n that interested UE is respectively system frame number in each activationary time monitoring;
10. method according to claim 9 is characterized in that described two frames may be same frames;
11. method according to claim 1 is characterized in that described step (e) also comprises:
Each paging frame in paging block transmits different paging indications (MPI), and the bit that constitutes a paging indication can be distributed in different frame, i.e. m_L
PIValue can be 1,2,4,8,16 bits;
12. according to claim 11, it is characterized in that, a paging block the paging indicated number that can carry simultaneously, when the bit number of each MPI is m_L
PIValue be 1,2,4 o'clock, m_Np=m_N
PICH* m_N
PI
13. according to claim 11, it is characterized in that, as the bit number m_L of each MPI
PIValue be 1,2,4 o'clock, the addressing of MPI, promptly calculate according to formula (1)-(5) position of MPI in paging block.
14. method according to claim 11 is characterized in that, a paging block the paging indicated number m_Np that can carry simultaneously, as the bit number m_L of each MPI
PIValue be 8 o'clock, if m_N
PICHBe 2, then m_Np is 1.If m_N
PICHBe 4, then m_Np is 2.
15. method according to claim 14 is characterized in that, the value of m_q and m_n determines according to table 2.
16. method according to claim 11 is characterized in that, the frame number m_N that has only paging block to comprise
PICHBe 4, the bit number m_L of each MPI
PIValue just can be 16, one paging blocks the paging indicated number m_Np that can carry simultaneously be 1.
17. method according to claim 16 is characterized in that, interested UE all four PICH frames in each activationary time current paging block that monitoring is relevant with SFNO simultaneously.
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| CNA031423345A CN1567773A (en) | 2003-06-13 | 2003-06-13 | Method for paging MBMS in wideband TDD mobile communication system |
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| CNA031423345A CN1567773A (en) | 2003-06-13 | 2003-06-13 | Method for paging MBMS in wideband TDD mobile communication system |
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