CN1871804A - Outer coding methods for broadcast/multicast content and related apparatus - Google Patents
Outer coding methods for broadcast/multicast content and related apparatus Download PDFInfo
- Publication number
- CN1871804A CN1871804A CN200480030786.6A CN200480030786A CN1871804A CN 1871804 A CN1871804 A CN 1871804A CN 200480030786 A CN200480030786 A CN 200480030786A CN 1871804 A CN1871804 A CN 1871804A
- Authority
- CN
- China
- Prior art keywords
- information
- block
- code block
- user profile
- multirow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Transmission techniques are provided that improve service continuity and reduce interruptions in delivery of content that can be caused by transitions that occur when the User Equipment (UE) moves from one cell to the other, or when the delivery of content changes from a Point-to-Point (PTP) connection to a Point-to-Multipoint (PTM) connection in the same serving cell, and vice-versa. Such transmission techniques enable seamless delivery of content across cell borders and/or between different transmission schemes such as Point-to-Multipoint (PTM) and Point-to-Point (PTP). Mechanisms for adjusting different streams and for recovering content from each data block during such transitions are also provided so that data is not lost during a transition. In addition, mechanisms for realigning data during decoding at a receiving terminal are also provided.
Description
Priority request according to 35U.S.C § 119
Present patent application requires on August 21st, 2003 to submit to, the provisional application No.60/497 that is entitled as " Method andApparatus for Seamless Delivery of Broadcast and Multicast ContentAcross Cell Borders and/or Between Different Transmission Schemes ", on August 21st, 457 and 2003 submitted to, the provisional application No.60/497 that is entitled as " L2 Designfor Outer Coding Scheme ", 456 priority, these two pieces of applications can transfer the application's assignee, so incorporate into herein with way of reference.
Invention field
The present invention relates generally to communication system, relate in particular to the transmission of broadcasting and multicast content.
Technical background
In the past, wireless communication system is used for the non-speech service of the professional and low data rate of voice-over.Today, the wireless communication system of being realized also needs to carry high data rate (HDR) multimedia service, as the business of video, data and other types.The streaming that multimedia broadcast multicast service (MBMS) channel can be used to transmit based on speech, Voice ﹠ Video data source is used, as the audio or video content of radio broadcasting, television broadcasting, film and other types.The stream data source can tolerate and postpone and a certain amount of loss or bit error, because these information sources sometimes intermittently and normally compress.Therefore, the data rate of the transmission of arrival wireless access network (RAN) possibility parameter is very big.Because application buffer is normally limited, so needs are supported the MBMS transmission mechanism of variable information source data rate.
Usually, the base station provides such multimedia communication service by sending information signal to subscriber station, and information signal often can be organized into a plurality of groupings.A grouping can be one group of byte, comprises the data (load) and the control element that are arranged in specific format.Control element can comprise, for example, lead code and quality metric standard, the quality metric standard can comprise the module of Cyclic Redundancy Check, parity check bit and other types.According to communication channel structure, usually a plurality of packet formats are changed into a piece of news.This message is propagated between initiation terminal and purpose terminal, and, may be subjected to the influence of communication channel characteristics, for example signal to noise ratio, decline, time change and other such characteristics.These characteristics produce different influences to modulation signal in different communication channels.In other are considered, need select suitable method by radio communication channel transmission modulating information signal, so that the information in the protection modulation signal.Such method comprises, for example, coding, symbol repeat, interweave and those skilled in the art known to additive method.But these methods can increase expense.Therefore, must between message transmission reliability and amount of overhead, make engineering compromise.
Operator is usually according to receiving MBMS content users interest station or subscriber equipment (UE), on the basis of honeycomb one by one, selects point-to-point (PTP) to connect or put multiple spot (PTM) to connect.
Dedicated channel is used in point-to-point (PTP) transmission, and service is sent to selected user in the overlay area." special use " channel bearing is from the information at unique user station/the mail to information at unique user station.In point-to-point (PTP) transmission, can use individual channel to transmit to each mobile radio station.In forward link or down link direction, for example,, can send a kind of private subscribers Business Stream of user's service by the logic channel of Dedicated Traffic Channel (DTCH) by name.Point-to-point (PTP) communication service normally the most efficiently, for example, if require the user of specific broadcast multi-broadcasting service (MBMS) not many in the overlay area.In this case, can adopt point-to-point (PTP) transmission, wherein, the base station only sends this service to the specific user who has asked this service.For example, in the WCDMA system, before the mobile radio station of a predetermined level is exceeded, use the transmission of dedicated channel or point-to-point (PTP) more efficient.
" broadcast communication " or " putting multiple spot (PTM) communication " is the communication of carrying out to a plurality of mobile radio stations by a common communication channel.Article one, therefore " public " channel bearing can be used by several terminals simultaneously from the information of a plurality of subscriber stations/mail to the information of a plurality of subscriber stations.In putting multiple spot (PTM) communication service, for example, if ask the number of users of a certain service to surpass the interior certain threshold quantity of base station coverage area, then cellular basestation can broadcast multimedia communication service on a common signal channel.In CDMA 2000 systems, replace the PtP transmission with broadcasting or put multiple spot (PTM) transmission usually, because almost the same with the PtP wireless carrier ground of PtM wireless carrier (radiobearer) is efficient.From the transmission of the common signal channel of a certain base station needn't with the common signal channel transmitting synchronous from other base stations.In a typical broadcast system, one or more central stations the user in a radio network provide content.Central station can send information to all subscriber stations or one group of specific subscriber station.Interested each subscriber station of a certain broadcast service is monitored the common forward link signal.Can on down link or forward direction common link, send a little to multiple spot (PTM) transmission.This common broadcast forward link signal is broadcasted on one-way channel usually, as is present in the CTCH Common Traffic Channel (CTCH) of forward link or " down link " direction.Because this channel is unidirectional, so, subscriber station usually not with base station communication because allow all subscriber units may make the communication system overload to the base station back information.Therefore, for putting multiple spot (PTM) communication service, when in the information that subscriber station receives mistake being arranged, possibly of subscriber station can't be to the base station back information.Therefore, other information protection means may be better.
In CDMA 2000 systems, subscriber station can carry out soft combination (soft combine) in putting multiple spot (PTM) transmission.Even taked the measure of protection information signal, the situation of communication channel also may descend, thereby causes the point of destination to decode to some groupings of transmitting by dedicated channel.In this case, a kind of solution is: the automatic repeat requests (ARQ) by application target (user) is stood and sent to initiator (base station) retransmits the not grouping of decoding simply.Re-transmission helps to guarantee the transmission of packet.If can't correctly transmit data, then can notify the RLC user in the transmitting terminal.
In a lot of situations, subscriber station will be changed usually.These conversions can be classified according to different modes.For example, conversion can be divided into " cross over transition " and " directly conversion ".Conversion also can be divided into " in the honeycomb " conversion and " between honeycomb " conversion.
Conversion between the honeycomb or between the transmission mechanism may cause service disruption, and this is not that the user is desired.When subscriber station or subscriber equipment (UE) when a honeycomb moves to another honeycomb or multimedia broadcast multicast service (MBMS) content be transmitted in the service honeycomb when a kind of pattern becomes another kind of pattern, may go wrong.From the transmission of adjacent cell offset t1 if having time each other.In addition, may introduce additional delay in the transition period, because mobile radio station need be determined the system information in the target cell, this needs the processing time Δ t2 of specified quantitative.There is skew each other from different honeycombs (or the point-to-point of different transmission channel kinds (PTP)/to multiple spot (PTM)) data flow transmitted.Therefore, putting from different honeycombs between multiple spot (PTM) transmission period, mobile radio station may be received identical content piece for twice, perhaps, may lose some content piece, and with regard to service quality, these are not desired.Between the honeycomb and/or point-to-point (PTP) transmit and put conversion between multiple spot (PTM) transmission, may cause the interruption of serving, this depends on the duration of conversion and delay or the misalignment between the transmission.
Therefore, need in this area to improve service continuity with reduce during content transmits when subscriber equipment (UE) when a honeycomb moves to another honeycomb, occur conversion caused or content be transmitted in same service honeycomb from point to points (PTP) is connected and becomes a little to multiple spot (PTM) connection with from putting the transmission technology that multiple spot (PTM) is connected the interruption that conversion caused of appearance when becoming point-to-point (PTP) connection.Under the preferable case, these transmission technologys can realize crossing over the honeycomb border and/or the seamless delivery of content between the different transmission mechanisms such as putting multiple spot (PTM) and point-to-point (PTP) transmits.Thereby people also wish to obtain to adjust various flows and recover content from each data block in these transition period to guarantee in the transition period mechanism of obliterated data not.In addition, people it would also be desirable to provide the mechanism of recalibrating data during the decoding in receiving terminal.
Description of drawings
Fig. 1 is the schematic diagram of a communication system;
Fig. 2 is the block diagram of UMTS signaling protocol stack;
Fig. 3 is the block diagram on the packet switching user plane of UMTS protocol stack;
Fig. 4 is the block diagram of the Access Layer part of UMTS signaling protocol stack;
Fig. 5 A is the block diagram of the different channels that uses in the data-transmission mode that uses in Radio Link control (RLC) layer of UMTS signaling protocol stack and each layer;
Fig. 5 B is the block diagram of architecture that comprises Radio Link control (RLC) layer of various RLC data-transmission modes;
Fig. 5 C is a block diagram of realizing the entity of Radio Link control (RLC) affirmation mode (AM);
Fig. 6 is the schematic diagram with modification UMTS protocol stack of forward error correction layer;
Fig. 7 A shows an embodiment of the protocol architecture of the Access Layer that comprises forward error correction (FEC) layer;
Fig. 7 B shows another embodiment of the protocol architecture of the Access Layer that comprises forward error correction (FEC) layer;
Fig. 8 be block of information and with the schematic diagram of the corresponding outside code block of this block of information;
Fig. 9 A is the foreign key block structured schematic diagram that can be applicable to multimedia broadcast multicast service (MBMS) data;
Fig. 9 B is the schematic diagram of the outer sign indicating number code block structure of Fig. 9 A, wherein sends multirow in each Transmission Time Interval (TTI);
Fig. 9 C is the schematic diagram of the outer sign indicating number code block structure of Fig. 9 A, wherein sends each row in a plurality of Transmission Time Intervals (TTI);
Figure 10 A and 10B are the schematic diagrames of the outside code block of forward error correction layer generation;
Figure 11 is an embodiment of forward error correction (FEC) layer that uses in RLC UM+ entity;
Figure 12 A shows the cataloged procedure of creating outside code block according to the data cell of the capable fixed size of outside code block;
Figure 12 B shows the information example of passing through wireless transmission among Figure 12 A;
Figure 13 shows the process of creating the outside code block with variable row size;
Figure 14 is the schematic diagram of an embodiment of forward error correction (FEC) header format;
Figure 15 shows and makes the algorithm of mobile radio station with the time offset between the decoding delay Different Logic stream;
The schematic diagram of Figure 16 provided when mobile radio station receiving that a point that comes cellular autofluorescence A transmits to multiple spot (PTM) and the outside code block of mobile radio station reception when receiving another point that comes cellular autofluorescence B and between multiple spot (PTM) transmission, changing between time relationship;
The schematic diagram of Figure 17 has provided the time relationship between the outside code block of putting mobile radio station reception when conversion occurring between the transmission of multiple spot (PTM) transmission and point-to-point (PTP); And
The schematic diagram of Figure 18 has provided the time relationship between an outside code block of receiving from the point of radio network controller (RNC) B mobile radio station during change or reorientate between multiple spot (PTM) transmits from the transmission of the point-to-point (PTP) of radio network controller (RNC) A and another.
Embodiment
" exemplary " used herein speech means " as example, illustration or explanation ".Here being described to any embodiment of " exemplary " or design should not be interpreted as than other embodiment or design more preferably or have superiority.
Here, term " mobile radio station " can use interchangeably with term " point of destination ", " subscriber station ", " subscriber unit ", " terminal " and " subscriber equipment (UE) ", and be used in reference to hardware here, as the base station, the Access Network such as UMTS Terrestrial radio access network (UTRAN) communicates with.In the UMTS system, subscriber equipment (UE) is the device that a kind of user of making can visit the service of UMTS network, preferably also comprises USIM, and it comprises user's ordering information.Mobile radio station can be that move or static, and, can comprise any communicator, data set or terminal usually, it communicates by wireless channel or wire message way, for example, uses optical fiber or coaxial cable.Mobile radio station can be arranged in and include but not limited to PC, small-sized sudden strain of a muscle card, external or devices such as internal modem or mobile or fixed line telephone.
Term " state is set up in connection " refers to mobile radio station and is setting up residing state in the process that active traffic channel is connected with the base station.
Term " service condition " refers to mobile radio station and has set up active traffic channel with the base station and be connected residing state.
Term used herein " communication channel " is used for based on context representing physical channel or logic channel.
Term used herein " physical channel " refers to the channel by air interface carrying user data or control information.Physical channel provides wireless platform " transmission medium ", its actual transmissions information, and be used for by Radio Link carrier signaling and user data.Physical channel generally includes the combination of frequency scrambled code and channel code.At uplink direction, also can comprise relative phase.Attempt What for based on mobile radio station, can in uplink direction, use a plurality of different physical channels.In the UMTS system, term " physical channel " also may refer to divide the different types of bandwidth that is used in various objectives on the Uu interface.The physics that physical channel has constituted the Uu interface between subscriber equipment (UE) territory and the network insertion territory exists.Physical channel can and be used for defining by the attribute of air interface transmission data by physical mappings.
Term used herein " transmission channel " refers to the communicating route of transfer of data between the reciprocity physical layer entity.Transmission channel relates to information transmission mode.Usually, two types transmission channel is arranged, that is: Common transport channel and dedicated transmission channel.Whether transmission channel can for example, use special use or public physic channel by how to define by air interface transmission data and characteristic thereof on physical layer, or, multiplexes logical channels.Transmission channel can be used as the Service Access Point (SAP) of physical layer.In the UMTS system, how transmission channel has been described the transmission logic channel and these information flows has been mapped to physical channel.Transmission channel can be used to carrier signaling and user data () between medium access control (MAC) layer and physical (L1).Radio network controller (RNC) monitor transmissions channel.One of any by in a plurality of transmission channels that can be mapped to physical channel, information is delivered to the MAC layer from physical layer.
Term used herein " logic channel " refers to and is exclusively used in particular type of information information transmitted stream or wave point.Logic channel is with just relevant in information transmitted.Logic channel can define by the type of transmission information, for example, signaling or user data, and can be regarded as network and terminal should be in the different task of different time points execution.Logic channel can be mapped to transmission channel, the latter carries out actual message transmission between mobile radio station territory and access domain.The transmission of information via logic channel, logic channel can shine upon by transmission channel, and transmission channel can be mapped to physical channel.
Term used herein " dedicated channel " refers to the channel that is exclusively used in or keeps for the specific user usually, and its beared information is sent to or from specific mobile radio station, subscriber unit or subscriber equipment.Dedicated channel is carried the information of pointing to given user usually, comprises the data and the high-rise control information of active service.Dedicated channel can identify with the particular code on the characteristic frequency.Dedicated channel can be two-way, thereby support feedback potentially.
Term used herein " common signal channel " refer to carrying be sent to/from the transmission of Information channel of a plurality of mobile radio stations.In common signal channel, information can be shared between a plurality of mobile radio stations.Common signal channel can be divided between all users in the honeycomb or one group of user.
Term used herein " point-to-point (PTP) communication " refers to by the communication of special-purpose physical communication channels to the single mobile station transmission.
Term used herein " broadcast communication " or " putting multiple spot (PTM) communication " refer to by the communication of common communication channel to a plurality of mobile radio stations.
Term used herein " reverse link or uplink channel " refers to a communication channel/link, and mobile radio station is by its base station transmit signals in wireless access network.This channel also can be used for from mobile radio station to the mobile base station or from the mobile base station to the base station transmits signal.
Term used herein " forward link or downlink channel " refers to a communication channel/link, and wireless access network sends signal by it to mobile radio station.
Term used herein " Transmission Time Interval (TTI) " refers to data arrive physical layer from high level time.Transmission Time Interval (TTI) can be represented the interarrival time of transport block set (TBS), and, approximate physical layer is transmitted TBS on wave point cycle.Can encode together and interweave the data that in a TTI, on transmission channel, send.TTI may be across a plurality of radio frames, and can be the interweave integral multiples in cycle of minimum.For single connection, time calibration is carried out in the starting position that can be multiplexed into the TTI of different transmission channels together.A plurality of TTI have a public starting point.In each TTI, the medium access control is delivered to physical layer with a transport block set.The different transmission channels that are mapped on the same physical channel can have different Transmission Time Intervals (TTI) duration.In a TTI, can send a plurality of PDU.
Term used herein " grouping " refers to one group of bit, comprises data or load and the control element arranged with specific format.For example, control element can comprise other known to lead code, quality metric standard and those skilled in the art.For example, the quality metric standard comprises other known to CRC, parity bits and those skilled in the art.
Term used herein " Access Network " refers to and is used for the required equipment of access network.Access Network comprises a plurality of base stations (BS) and one or more base station controller (BSC).Access Network transmits grouping between a plurality of subscriber stations.Access Network also can be connected to other networks outside the Access Network, as intranet or the Internet, and, can access terminal and these external networks between transmission grouping.In the UMTS system, Access Network can be called as UMTS Terrestrial radio access network (UTRAN).
Term used herein " core net " refers to exchange and routing capabilities, for the circuit-switched call in circuit switching (CS) territory, be used to be connected to public switch telephone network (PSTN), perhaps, packet switched call in packet switching (PS) territory is used to be connected to Packet Switch Data Network (PSDN).Routing capabilities also represented in term " core net ", is used for moving and customer location management and authentication service.Core net comprises being used to exchange with the user controls required network element.
Term used herein " base station " refers to " initiator ", and it comprises the hardware that communicates with mobile radio station.In the UMTS system, term " Node B " can use interchangeably with term " base station ".The base station can be fixed, and also can move.
Term used herein " honeycomb " refers to hardware or geographical coverage area, and this depends on the context that uses this term.
Term used herein " service data unit (SDU) " refers to the data cell of the agreement exchange of using on the related protocol.
Making that term used herein " load data unit (PDU) " refers to is the data cell that exchanges with the agreement under the related protocol.If related protocol is clueless true, then need in name, specifically note.For example, FEC-PDU is the PDU of FEC layer.
Term used herein " soft handover " refers to the communication between subscriber station and two or more sectors, and wherein, each sector belongs to different honeycombs.These two sectors can receive reverse link communication can, forward-link communication can be carried on the forward link of two or more sectors simultaneously.
Term used herein " More Soft Handoff " refers to the communication between subscriber station and two or more sectors, and wherein, each sector belongs to identical honeycomb.These two sectors can receive reverse link communication can, on the forward link that forward-link communication one of can be carried in these two or more sectors simultaneously.
Term used herein " deletion information (erasure) " refers to and fails to discern a certain message, also can be used for the one group of bit that expresses possibility and lose when decoding.
Term " cross over transition (cross transition) " can be defined as: (PTP) transmission from point to points becomes a little to multiple spot (PTM) transmission or from putting the conversion of multiple spot (PTM) transmission becoming point-to-point (PTP) transmission.Four kinds of possible cross over transition are: the point-to-point from honeycomb A (PTP) is transferred to point among the honeycomb B and is transferred to the point that point-to-point (PTP) transmission among the honeycomb B, point-to-point (PTP) from honeycomb A be transferred among the honeycomb A to multiple spot (PTM) transmission, point from honeycomb A to multiple spot (PTM) and transmits to the point-to-point (PTP) that multiple spot (PTM) is transferred among the honeycomb A to multiple spot (PTM) transmission, point from honeycomb A.
Term " directly conversion (direct transition) " can be defined as: be transferred to the conversion of another point-to-point transmission from a point-to-point, and, from a point to the conversion of multicast communication to another to multicast communication.Two kinds of possible direct conversions are that point-to-point (PTP) transmission and the point from honeycomb A that the point-to-point (PTP) from honeycomb A is transferred among the honeycomb B transmits to multiple spot (PTM) to the point that multiple spot (PTM) is transferred among the honeycomb B.
The conversion that is used to represent to cross over the honeycomb border " changed " in term between honeycomb.Conversion is between four kinds of possible honeycombs: the point-to-point from honeycomb A (PTP) be transferred to point-to-point (PTP) transmission among the honeycomb B, the point from honeycomb A to multiple spot (PTM) be transferred among the honeycomb B point to multiple spot (PTM) transmission, point-to-point (PTP) from honeycomb A be transferred among the honeycomb B point to multiple spot (PTM) transmit, point from honeycomb A transmits to the point-to-point (PTP) that multiple spot (PTM) is transferred among the honeycomb B.Usually, the most frequent conversion be cross over the honeycomb border be transferred to the conversion of a little transmitting from putting multiple spot (PTM) to multiple spot (PTM).
Term " honeycomb internal conversion " is used to be illustrated in the conversion from a kind of pattern to another kind of pattern in the honeycomb.Two kinds of possible honeycomb internal conversions are: the point that the point-to-point from honeycomb A (PTP) is transferred among the honeycomb A transmits to the point-to-point (PTP) that multiple spot (PTM) is transferred among the honeycomb A to multiple spot (PTM) transmission and the point from honeycomb A.
Term " wireless carrier (radio bearer) " is used to a kind of service of representing that the second layer provides, is used for transmitting user data between subscriber equipment (UE) and UMTS Terrestrial radio access network (UTRAN).
In the embodiment of the invention that will discuss, aspect discussed above is implemented in WCDMA or the UMTS communication system below.Fig. 1-5C shows some aspects of traditional UMTS or WCDMA system, and wherein, aspect of the present invention described herein is the unrestricted purpose for explanation just.Should be understood that, each side of the present invention also is applicable to the system of other voice-overs and data, as gsm system and CDMA 2000 systems, it defers to " third generation partner program (3GPP) ", be included in one group of document, comprise document 3G TS 25.211,3G TS 25.212,3G TS 25.213 and 3G TS 25.214 (W-CDMA standard) or " TR-45.5 Physical Layer Standard for cdma2000 SpreadSpectrum Systems " (IS-2000 standard) and GSM standard are as TS 04.08 (theMobile radio interface layer 3 specification) and TS 05.01 (Physical Layeron the Radio Path (General Description)).
For example, although point out that at specification wireless access network 20 can realize with universal land radio access web (UTRAN) air interface, but, in the GSM/GPRS system, Access Network 20 may be GSM EDGE Radio Access Network (GERAN), perhaps, under situation between system, it can comprise the honeycomb of UTRAN air interface and the honeycomb of GSM/EDGE air interface.
The UMTS network topology
Fig. 1 is the block diagram according to the communication system of UMTS network topology.The UMTS system comprises subscriber equipment (UE) 10, Access Network 20 and core net 30.UE 10 is connected to Access Network 20, and Access Network 20 is connected to core net 30, and core net 30 can be connected to external network.
RNC is controlling the Radio Resource of UTRAN.The RNC 24 of Access Network 20 communicates by letter with core net 30 by the Iu interface.Uu interface 26, Iu interface 25, Iub interface and Iur interface can be realized from the equipment room of different vendor interconnected, and stipulate in the 3GPP standard.The realization of radio network controller (RNC) changes with manufacturer, therefore, can do recapitulative introduction below.
Radio network controller (RNC) 24 is used as the exchange and the control unit of UMTS Terrestrial radio access network (UTRAN), and between Iub interface and Iu interface 25.The Service Access Point of RNC all services that to be UTRAN provide to core net 30, for example, to the management of the connection of subscriber equipment.Iub interface 23 connected node B 22 and radio network controller (RNC) 24.The Iu interface is connected to core net with UTRAN.Radio network controller (RNC) provides the exchange point between Iu carrier and the base station.Subscriber equipment (UE) 10 has a plurality of wireless carriers, is positioned between its own and radio network controller (RNC) 24.Wireless carrier relates to subscriber equipment (UE) context, is that Iub arranges the public connection between subscriber equipment (UE) and the radio network controller (RNC) to be connected the one group of definition that needs with special use.Each RNC 24 can intercom mutually by optional Iur interface, thereby supports to be connected to the soft handover between the honeycomb of different nodes 22.Therefore, the Iur interface can be realized connecting between RNC.In this case, the Iu that Serving RNC is maintained to core net 30 connects 25, and carries out selector and exterior ring power controlled function, and skew RNC can pass through the frame of Iur interface exchange via one or more base stations 22 to mobile radio station 10 transmission.
The RNC that is controlling a Node B 22 can be called as the control RNC of Node B, and it is controlling the load of its honeycomb and congested, also carries out access control, and for the new wireless link distribution code that will in these honeycombs, set up.
RNC and base station (or Node B) can be connected and communicate by letter by Iub interface 23.RNC is controlling the Radio Resource operating position of each base station 22 that is connected to specific RNC 24.One or more honeycombs are being controlled in each base station 22, and provide Radio Link to mobile radio station 10.But the base station executive's interface is handled, as chnnel coding and interweave, rate adaptation and spread spectrum.Basic radio resource management operations is also carried out in the base station, controls as inner loop power.Data flow between base station 22 conversion Iub interface 23 and the Uu interface 26.Base station 22 also participates in RRM.Air interface Uu 26 is connected to mobile radio station 10 with each base station 22.The wireless transmission of mobile radio station 10 is responsible in one or more honeycombs in these base stations, and, in one or more honeycombs from the wireless receiving of mobile radio station 10.
Core net 30 can be connected to circuit external exchange (CS) network 42, the latter provides circuit switching to connect, as public switch telephone network (PSTN) or (ISDN), if there is packet switched call, perhaps, can be connected to PS network 44, as the Internet that provides packet data service to connect, it is if exist packet switched call.
The UMTS signaling protocol stack
Fig. 2 is the block diagram of UMTS signaling protocol stack 110.UMTS signaling protocol stack 110 comprises Access Layer and Non-Access Stratum (NAS).
Access Layer (access statum) generally includes physical layer 120, the second layer 130 and Radio Resource control (RRC) layer 160, and the second layer 130 comprises medium access control (MAC) layer 140 and Radio Link control (RLC) layer 150.To describe each layer of Access Layer below in detail.
(non-access statum) is substantially the same with the GSM high level for the UMTS Non-Access Stratum, can be divided into circuit switching part 170 and packet switched portion 180.Circuit switching part 170 comprises connection management (CM) layer 172 and mobile management (MM) layer 178.The 172 treatment circuit switched call of CM layer, and comprise each Seed Layer.Call out control (CC) sublayer 174 and carry out functions such as foundation and release.Function such as calling transfer and the three-way calling that carry out supplementary service (SS) sublayer 176.Short Message Service is carried out in Short Message Service (SMS) sublayer 177.The position of MM layer 178 treatment circuit switched call is upgraded and authentication.Packet switched portion 180 comprises session management (SM) sublayer 182 and GPRS mobile management (GMM) sublayer 184.Packet switched call is handled by carrying out functions such as foundation and release in session management (SM) sublayer 182, also comprises Short Message Service (SMS) 183.Renewal of packet switching position component and authentication are handled in GMM sublayer 184.
Fig. 3 is the block diagram on the packet switching user plane of UMTS protocol stack.This stack comprises access layer (AS) and non-access layer (NAS).The NAS layer comprises application layer 80 and packet data protocol (PDP) layer 90.Application layer 80 provides between subscriber equipment (UE) 10 and long-distance user 42.PDP layer 90 as IP or PPP, provides between GGSN 40 and subscriber equipment (UE) 10.Low layer packet oriented protocol (LLPP) the 39th provides between long-distance user 42 and SGSN 38.Iu interface protocol 25 provides between radio network controller (RNC) 24 and SGSN 38, and the Iub interface agreement provides between radio network controller (RNC) 24 and Node B 22.Other parts of AS layer will be described below.
Access Layer (AS)
Fig. 4 is the block diagram of the Access Layer of UMTS signaling protocol stack.Traditional Access Layer comprises physical (L1) 120, data link layer (L2) 130 (having sublayers such as medium access control (MAC) layer 140, Radio Link control (RLC) layer 150, packet data convergence protocol layer 156, broadcast/multi broadcast control (BMC) layer 158) and Radio Resource control (RRC) layer 160.These layers are described in further detail below.
Wireless carrier is carrying user data between application layer and the second layer (L2) 130.Control plane signaling 161 can be used for the specific control signaling of all UMTS, and comprises the application protocol that is used to transmit application protocol message in the signaling vector.Application protocol can be used for being established to the carrier of UE 10.All user plane information 163 that this user-plane transmissions is sent and received by the user are as coded speech in the voice call or the grouping in the Internet connection.The data medium of user plane information 163 carrying data flow and these data flow.Each data flow can be described by the one or more Frame Protocols that are exclusively used in this interface.
Radio Resource control (RRC) layer 160 is total body controllers of Access Layer, and other all layers in the configuration Access Layer.Rrc layer 160 generates control plane signaling 161, and the latter controls Radio Link control unit 152, physical (L1) 120, medium access control (MAC) layer 140, Radio Link control (RLC) layer 150, packet data convergence protocol (PDCP) layer 156 and broadcast/multi broadcast control (BMC) layer 158.Radio Resource control (RRC) the layer 160 definite type that will measure, and report these measurement results.Rrc layer 160 also is used as the control and the signaling interface of Non-Access Stratum.
More particularly, rrc layer 160 is to all subscriber equipmenies (UE) 10 broadcast system information message, and system information comprises Access Layer and Non-Access Stratum information element.The Radio Resource control (RRC) that rrc layer 160 is set up, safeguarded and discharges between UTRAN 20 and the UE 10 connects.UE RRC asks to connect, and UTRAN RRC foundation is connected with discharging.The wireless carrier between UTRAN 20 and the UE 10 is also set up, reconfigures and discharged to rrc layer 160, starts these operations by UTRAN 20.
Rrc layer 160 is gone back the various aspects that process user equipment (UE) 10 moves.These processes depend on the UE state, call out to be the circuit switching or the wireless access technology (RAT) of packet switched call and new honeycomb.Rrc layer 160 is paging UE 10 also.UTRAN RRC paging UE, and be paging channel or Page Indication Channel no matter this UE monitoring.The upper strata of the RRC notice core net (CN) 30 of UE.
Data link layer (L2) 130 comprises medium access control (MAC) sublayer 140, Radio Link control (RLC) sublayer 150, packet data convergence protocol (PDCP) sublayer 156 and broadcast/multi broadcast control (BMC) sublayer 158.
Broadcast/multi broadcast control (BMC) 158 transmits the message of sending from the cellular broadcasting center by adapting to the broadcast from broadcast domain on the wave point on wave point.BMC agreement 158 provides the service of " wireless carrier " by name, and is present in the user plane.The cellular broudcast message that BMC agreement 158 and RNC storage receive by CBC-RNC is to be subjected to scheduled transmission.At UTRAN one end, BMC 158 is based on calculating cellular broadcasting and serve required transmission rate, and ask suitable CTCH/FACH resource from RRC by the message of CBC-RNC interface (not shown) reception.BMC agreement 158 is also by CBC-RNC interface, receiving scheduling information and each cellular broudcast message.Based on this schedule information, at UTRAN one end, BMC correspondingly generates message of being dispatched and the BMC message sequence of being dispatched.At subscriber equipment one end, BMC estimates scheduling message, and to RRC indication scheduling parameter, scheduling parameter can be used for disposing the discontinuous reception of low layer by RRC.BMC also sends BMC message according to plan, as scheduling and cellular broudcast message.Uninterrupted cellular broudcast message can be delivered to high level.The part of the control signaling between UE 10 and the UTRAN 20 can be Radio Resource control (RRC) 160 message, and it is carrying foundation, modification and release second layer agreement 130 and all required parameters of ground floor agreement 120 entities.RRC message is being carried all high-level signalings in their load.Radio Resource control (RRC) is being controlled subscriber equipment moving under connected mode by as signalings such as measurement, switching and honeycomb renewals.
Packet data convergence protocol (PDCP) 156 is present in the user plane, is used for providing service from the PS territory.The service that PDCP provides is called as wireless carrier.Packet data convergence protocol (PDCP) provide the header-compressed service.For the service by wireless transmission IP grouping, the compression method that packet data convergence protocol (PDCP) 156 comprises can provide better spectrum efficiency.Can use any header compression algorithm.PDCP compresses redundancy protocol information in sending entity, and decompresses in receiving entity.Header compression method can be at particular network layer, transport layer or upper-layer protocol combination, for example TCP/IP and RTP/UDP/IP.It is the data of PDCP service data unit (SDU) from the form that Non-Access Stratum receives that PDCP also transmits it, and it is transmitted to the RLC entity, and vice versa.PDCP also supports harmless SRNS to relocate.When the PDCP use has affirmation pattern (AM) RLC of sequence delivery, the PDCP that can be configured to support harmless RSRNS to relocate has protocol Data Unit (PDU) sequence number, during reorientation, sequence number can be forwarded to new SRNC with unacknowledged PDCP grouping.
On control plane 161, rlc layer can use the RLC service to carry out the signaling transmission.On user plane 163, special services protocol layer PDCP or BMC or other high-rise user-plane function can be used the RLC service.For the service of not using PDCP 156 or user-plane protocol, RLC service can be called signaling wireless carrier in the control plane 161 and the wireless carrier in the user plane 163.In other words, the service that rlc layer 150 provides is called as signaling wireless carrier (SRB) in control plane 161, and is called as wireless carrier (RB) in user plane 163, if this service can not be used PDCP or BMC agreement.Otherwise the RB service can be provided by PDCP layer 156 or BMC layer 158.
150 pairs of user data of Radio Link control (RLC) layer and control data are carried out the framing function, and it comprises and cutting apart/be connected in series and fill function.For the control data in the control plane 161, rlc layer 150 provides to Radio Resource control (RRC) layer 160 usually to be cut apart and retransmission service, for the user data in the user plane 163, provides to application layer and to cut apart and retransmission service.Rlc layer is divided into elongated higher layer protocol data units (PDU) littler rlc protocol data cell (PDU) usually, perhaps, littler rlc protocol data cell (PDU) is reassembled into elongated higher layer protocol data units (PDU).Radio Link control (RLC) protocol Data Unit (PDU) carries a PDU usually.For example, can be according to the minimum possibility bit rate of the service of using Radio Link control (RLC), setting wireless controlling links (RLC) PDU size.For the variable Rate service, when any bit rate that uses is higher than lowest bitrate, in a Transmission Time Interval (TTI), can transmit a plurality of Radio Link control (RLC) PDU, will discuss to this below.The RLC sending entity is also carried out serial connection.If the content of Radio Link control (RLC) service data unit (SDU) is not filled up integer Radio Link control (RLC) PDU, then can insert the first of next Radio Link control (RLC) SDU among Radio Link control (RLC) PDU, be connected in series with the final stage of last RLC SDU.The RLC sending entity is also carried out usually and is filled function.When remaining data to be sent can not fill up Radio Link control (RLC) PDU of intended size, the available bit of filling up of the residue of this data field filled up.According to the aspect of being discussed below in conjunction with Figure 11-13 of the present invention, for example, can provide the technology that reduces or eliminate employed loading.
The RLC receiving entity detects repetition Radio Link control (RLC) PDU that receives, to guarantee that high level was once arrived in the transmission as a result among the high-rise PDU.Rlc layer is also controlled the speed that the RLC sending entity can send information to the RLC receiving entity.
Fig. 5 A is the block diagram of the data-transmission mode of use in Radio Link control (RLC) layer of UMTS signaling protocol stack, the figure shows logic, transmission and physics UMTS channel may shine upon with respect to Access Layer.It will be appreciated by those skilled in the art that to define all mappings simultaneously, can carry out a plurality of instantiations of some mappings simultaneously for given subscriber equipment (UE).For example, voice call may use three Dedicated Traffic Channels (DTCH), and these three Dedicated Traffic Channels (DTCH) are mapped to three dedicated channels (DCH) transmission channel.In addition, some channels shown in Fig. 5 as CPICH, SCH, DPCCH, AICH and PICH, are present in the physical layer environment, and, do not carry high-level signaling or user data.The context of these channels can define in physical layer 120 (L1).
Each RLC example in Radio Link control (RLC) layer can be controlled (RRC) layer 160 by Radio Resource and be configured, thereby work in one of following three kinds of patterns: transparent mode (TM), no affirmation mode (UM) or affirmation mode (AM), below in conjunction with Fig. 5 B it is made detailed description.These three kinds of data-transmission modes are illustrated in to be logic channel collocation wireless link control (RLC) under which kind of pattern.Transparent and no affirmation mode RLC entity is defined as unidirectional, and the affirmation mode entity is two-way.Usually, for all RLC patterns, physical layer is carried out the CRC error detection occurs, and the crc check result is passed to RLC with real data.According to the specific requirement of various patterns, these patterns are carried out some or all functions of rlc layer 150, comprise cutting apart, recombinate, be connected in series, fill, retransmit control, flow control, duplicate detection, transmission in order, error detection and encryption.These functions also will be made more detailed description in conjunction with Fig. 5 B and Fig. 5 C below.According to one aspect of the present invention discussed here, can provide a kind of new Radio Link control (RLC) data-transmission mode.
The MAC layer also according to the instantaneous information source speed of logic channel, is the suitable transformat (TF) of each transmission channel selection.By selecting " high bit rate " and " low bit rate " transformat (TF) for different data streams, MAC layer 140 provides the processed of data flow.Packet switching (PS) data inherence is exactly a burst type, and therefore the data volume that will send changes with frame.When more data, MAC layer 140 can be selected a kind of higher data speed, and still, when signaling and user data all existed, MAC layer 140 was selected between them, to improve the data volume that sends from higher priority channel.Can select transformat (TF) according to transformat combination (TFC), can control by the admittance of each connection according to transformat combination (TFC) and define.
Medium access control (MAC) layer is also carried out and is encrypted.Can encrypt individually each wireless carrier.Among the 3GPP TS 33.102 encryption is described in detail.
In the system such as WCDMA, there is three types transmission channel to can be used for transmitting grouped data.These channels are Common transport channel, dedicated transmission channel and shared transmission channel.In down link, the transmission channel grouped data is selected by packet scheduling algorithm.In up link, the parameter that transmission channel is set according to packet scheduling algorithm by mobile radio station 10 is selected.
Common signal channel can be, for example, and Random Access Channel RACH in the up link and the forward access channel FACH in the down link.They are carrier signaling data and user data all.Common signal channel has very low settling time.Because common signal channel just can be used for command transmitting before connecting foundation, so common signal channel can be used for sending immediately grouping, and without any long settling time.Usually, all there are several RACH or FACH in each sector.Common signal channel does not have feedback channel, therefore, uses open Loop Power control or constant power usually.In addition, common signal channel can not use soft handover.Therefore, the link grade performance of common signal channel is not so good as dedicated channel, and, can produce more the interference than dedicated channel.Therefore, common signal channel is more suitable for transmitting little independent grouping.Application such as application of in common signal channel, using such as Short Message Service and short text Email.Send the notion that single request also is fit to common signal channel to webpage, still, for bigger data volume, the wireless performance of common signal channel is very poor.
Dedicated channel can be used fast power control and soft handover feature, thereby improves wireless performance, and the interference of generation is less than common signal channel usually.But, set up time that dedicated channel spends more than inserting common signal channel.Dedicated channel can have variable bit rate, counts the K byte to up to per second 2M byte from per second.Because bit rate can change during the transmission, so, must come the allocation of downlink orthogonal code according to maximum bit rate.Therefore, the down link orthogonal code space of variable bit rate dedicated channel consume valuable.
Physical (L1) 120 is connected to MAC layer 140 by the transmission channel that carries signaling information and user data.Physical layer 120 provides service by transmission channel to the MAC layer, it is characterized in that how transmitting data and feature thereof.
Physical (L1) 120 receives signaling and user data via physical channel by Radio Link.Physical (L1) is carried out multiplexing and chnnel coding usually, comprise CRC calculating, forward error correction (FEC), rate-matched, interlaced transmission channels data and multiplexing transmission information channel data, and other physical layer procedure, as obtain, access, paging and Radio Link foundation/failure.Physical (L1) also is responsible for spread spectrum and scrambling, modulation, measurement, transmit diversity, power weightings, switching, compact model and power control.
Fig. 5 B is the block diagram of the architecture of Radio Link control (RLC) layer.As previously mentioned, Radio Resource control (RLC) layer 150 each a RLC entity or the example 152 that Radio Link can be controlled in (RLC) layer 150 are configured to work in one of three kinds of data-transmission modes: transparent mode (TM), no affirmation mode (UM) or affirmation mode (AM).The data-transmission mode of user data is controlled by service quality (QoS) setting.
TM is unidirectional, comprises sending TM entity 152A and receiving TM entity 152B.Under transparent mode, in high level data, do not add the agreement order.Can abandon the protocol Data Unit (PDU) of makeing mistakes or it is designated as and make mistakes.Can use stream transmission, wherein, high level data is not segmentation usually, but in special case, can realize transmitting limited cutting apart/the reorganization ability yet.When use cut apart/when recombinating, can set up at wireless carrier and consult this point in the process.
UM also is unidirectional, comprises sending TM entity 152C and receiving TM entity 152D.UM RLC entity is defined as unidirectional because between up link and the down link without any need for association.In UM, data passes is less than guaranteeing.For example, UM can be used for specific RRC signaling procedure, and wherein, confirming and retransmitting is not the part of RRC process.Utilizing the example of user's service of no affirmation mode RLC is cellular broadcasting service and VOIP.Can mark the data of makeing mistakes, or it is abandoned, this depends on configuration.Can use do not have clear and definite signaling capability based on the abandoning of timer, thereby can from transmission buffer, delete the RLC PDU that in special time, can't send simply.Do not having under the data-transmission mode of affirmation, the PDU structure comprises sequence number, therefore can carry out the sequence number inspection.Sequence number inspection help to guarantee the to recombinate integrality of PDU, therefore, a kind of detection means is provided, when Radio Link control (RLC) PDU is reassembled into Radio Link control (RLC) SDU, by checking the sequence number among Radio Link control (RLC) PDU, detect Radio Link control (RLC) SDU that makes mistakes.Can abandon any Radio Link control (RLC) SDU that makes mistakes.Under no affirmation mode (UM), also can provide and cut apart and be connected in series.
Under affirmation mode, RLC AM entity is two-way, and in can be in the opposite direction with the Link State indication incidentally in user data.Entity shown in the block diagram of Fig. 5 C is used to realize Radio Link control (RLC) affirmation mode (AM) entity and how makes up AMPDU.The packet (RLC SDU) that receives from high level via AM-SAP can be cut apart and/or is connected in series the protocol Data Unit (PDU) of 514 one-tenth regular lengths.The length of protocol Data Unit is to set up the semi-static value of determining in the process at wireless carrier, can reconfigure process by the RRC wireless carrier and change.For serial connection or fill up purpose, the beginning that loaded length and expansion bit for information about can be inserted last protocol Data Unit maybe can comprise the data from SDU.If a plurality of SDU fill up a PDU, then can be connected in series them, a suitable length indicator (LI) is inserted the beginning of PDU.Then, PDU can be inserted in the transmission buffer 520, transmission buffer 520 also is responsible for retransmission management.
From transmission buffer 520, take out a PDU,, just can construct PDU for it adds header.If the data among the PDU are not filled up whole RLC PDU, can add and fill up field or status message incidentally.Incidentally status message can abandon with indication RLC SDU from receiving terminal or transmitting terminal.Header comprises RLC PDU sequence number (SN), can be used for the poll bit (P) from equity side's entity requests state, also comprises length indicator (LI) alternatively, if be connected in series SDU in RLC PDU, fill up information or PDU incidentally, then can use it.
Affirmation mode (AM) is generally used for the packet type service, as internet browsing and email download.In affirmation mode, can use automatic repetitive requests (ARQ) mechanism to carry out error detection occurs.Can retransmit any grouping that mistake is arranged.By the repeatedly re-transmission that configuration is provided by RLC, RRC can control quality and the delay performance of RLC.If RLC is Data transmission correctly, for example, if if reached the maximum quantity that retransmits or surpassed the transmission time, then notice is high-rise, can abandon Radio Link control (RLC) SDU.By in a status message, sending the slide receiving window order, also SDU can be abandoned operational notification equity side entity, thereby receiver is also deleted all and is belonged to the PDU that is dropped Radio Link control (RLC) SDU.
The RLC configuration can being used in order, (in-sequence) transmits and out of order (out-of-sequence) transmission.For orderly transmission, can keep the order of high-rise PDU, and in a single day delivered out of order receives high-rise PDU fully, just it is forwarded.Rlc layer provides the orderly transmission of high-rise PDU.This function preservation RLC submits the order with the high-rise PDU that transmits to.If do not use this function, then can provide out of order transmission.Except that data PDU transmits, also can be between reciprocity RLC entity the delivery status and the control procedure that resets.Control procedure even can also use independently logic channel, thus an AM RLC entity can use one or two logic channel.
For confirming and not having the RLC of affirmation pattern, can in rlc layer, encrypt.In Fig. 5 C,, AM RLCPDU is encrypted 540 except comprising preceding two bits of PDU sequence number and poll bit.The PDU sequence number is an input parameter of cryptographic algorithm, and for peer-entities, it must be readable, encrypts thereby carry out.3GPP standard TS33.102 has described encryption.
Then, can pass through logic channel, PDU is forwarded to MAC layer 140.In Fig. 5 C, extra logic channel (DCCH/DTCH) dots, and RLC entity of this explanation can be configured to use the Different Logic channel to send control PDU and data PDU.The receiving terminal 530 of AM entity receives RLC AMPDU by a logic channel from the MAC layer.Can check mistake with physical layer CRC, physical layer CRC can draw by whole RLCPDU is calculated.Actual crc check can be carried out in physical layer, and after whole header was decrypted, the RLC entity received crc check result and data, and possible incidentally state information can extract from RLC PDU.If be piggybacked among the AM PDU if the PDU that receives is strong message or state information, then control information (status message) can be delivered to transmitting terminal, transmitting terminal is checked transmission buffer, with itself and the state information contrast of receiving.Be used to decipher 550 PDU number from the RLC header, also when the PDU that will encrypt stores in the reception buffer, using.In case when belonging to whole PDU of complete S DU and all being in the reception buffer, SDU just can recombinate out.Although do not show among the figure, before RLC SDU is sent to high level, can carry out the inspection and the duplicate detection of orderly transmission yet.
When subscriber equipment (UE) or mobile radio station conversion between PTM transmission and point-to-point (PTP) transmission (or change honeycomb), reinitialize RLC entity 152.This may cause losing of all data in Radio Link control (RLC) buffer very unfriendly.As mentioned above, when mobile radio station when a honeycomb moves to another honeycomb or when multimedia broadcast multicast service (MBMS) delivery of content the service honeycomb from point to points (PTP) transmission mode change for point when multiple spot (PTM) transmits, may go wrong.
Desired is, keep multimedia broadcast multicast service (MBMS) to transmit and put the continuity of the transition period between multiple spot (PTM) transmission at point-to-point (PTP), or between different honeycombs (as, switch) continuity of transition period of occurring, and avoid submitting to duplicate message.For the continuity that keeps MBMS service with avoid submitting to duplicate message, the second layer 150 should be able to be to recalibrating from the data of two streams.It is this synchronous that physical layer can't provide, because the network termination point may be different under various patterns.If carry out forward error correction (FEC) under rlc layer 150, just so, then data are transmitted and any transition period of putting between multiple spot (PTM) transmission all may lose at point-to-point (PTP) in 3GPP2, and vice versa.In addition, this needs physical layer synchronization and share identical medium access control (MAC) between a plurality of honeycomb (as having common scheduling).Therefore, do not have among inapplicable 3GPP2 in such vacation, this may cause problem.
Point-to-point (PTP) transmission
Suppose to use and have very strong delay tolerance, the efficient data transmission mode that then is used for point-to-point (PTP) transmission is Radio Link control (RLC) affirmation mode (AM).For example, RLC affirmation mode (AM) is generally used for the packet switched data transmission on the dedicated logical channel (PTP).RLC works in the affirmation pattern (AM) on the dedicated logical channel.Shown in Fig. 5 A, can send the private subscribers business of a customer service in the down link direction by the logic channel of Dedicated Traffic Channel (DTCH) by name.
Under affirmation mode (AM), if data go wrong, reverse link can be used for repeat requests.RLC sends Service Data Unit (SDU), and by retransmitting, guarantees to be transferred to its peer-entities.If RLC is Data transmission correctly, then notify the RLC user of transmitting terminal.Work under the RLC AM normally obvious power saving, but cost is to introduce additional delay.
Point is to multiple spot (PTM) transmission
CTCH Common Traffic Channel (CTCH) is the one-way channel that is present in the down link direction, when to all terminals or one group of particular terminal transmission information, can use it.Two kinds of data-transmission modes all use unidirectional common signal channel, and unidirectional common signal channel does not have reverse chain channel to set up.
Desired providing a kind ofly can make the MBMS service at point-to-point (PTP) with put between multiple spot (PTM) transmission mode structure of switching pellucidly.In order to obtain good performance at point-to-point (PTP) with when putting between multiple spot (PTM) transmission mode conversion, also expectation provides a kind of structure of switching between different radio controlling links (RLC) pattern of realizing.For example, this has and helps reduce power requirement.
To embodiment shown in Figure 19, various aspects of the present invention are described below in conjunction with Fig. 6.By using new forward error correction (FEC) layer, these features help to guarantee the service continuity in these transition periods.
Fig. 6 is the schematic diagram with modification UMTS protocol stack of forward error correction layer, and it works under forward error correction (FECd) pattern and forward error correction (FECc) pattern.When subscriber equipment (UE) (PTP) transmission is from point to points changed into a little to multiple spot (PTM) transmission, Radio Link control (RLC) entity 152 below forward error correction (FEC) layer makes can change to another kind of Radio Link control (RLC) data-transmission mode from a kind of Radio Link control (RLC) data-transmission mode, keeps the continuity of service simultaneously.According to this embodiment, FEC can work under first pattern (FECc) or second pattern (FECd).In one implementation, first pattern (FECc) can be utilized parity block, and second pattern (FECd) can be worked under the situation of parity block not having.The influence that changes between FECd and FECc pattern may be far below changing between the RLC pattern, and can be seamless, thereby in the transition period loss of data does not take place.
In order to protect user data, forward error correction (FECc) pattern can be utilized the external encode technology.This is especially effective on common signal channel.Forward error correction (FECc) pattern can be controlled the function that realizes on (RLC) layer under the no affirmation mode (UM) usually at Radio Link, as framing (cut apart and be connected in series) and sequence number interpolation.Therefore, Radio Link control (RLC) layer can use transparent mode (TM) to put multiple spot (PTM) transmission, because can carry out traditional no affirmation mode (UM) function in forward error correction (FEC) layer.Although Radio Link control (RLC) affirmation mode (AM) down this function may be repetition, remedy this repetition by the benefit of ARQ gained.
By forward error correction (FEC) layer or external encode are placed on Radio Link control (RLC) layer, sequence number can be added in the layer that is independent of Radio Link control (RLC).With additional expense, for example sequence number is used for unacknowledged transmissions, protocol Data Unit (PDU) and encoder packet (EP) can be recalibrated during the asynchronous transmission of MBMS data.Because the floor height that sequence number is added to is in Radio Link control (RLC), so it is identical that point-to-point (PTP) transmits with the sequence number of putting multiple spot (PTM) transmission, therefore, when from putting multiple spot (PTM) transmission when being converted to point-to-point (PTP) transmission, can keep the continuity of sequence number.This makes that data can obtain recalibrating, thus can avoid data repetition and/obliterated data.
External encode also can be used for a little transmitting to multiple spot (PTM), and it can be saved some power and/or reduce the delay that retransmits for system potentially.Multimedia broadcast multicast service (MBMS) data can be tolerated delay to a certain extent.In point-to-point (PTP) transmission, provide a feedback paths.Owing to used the ARQ re-transmission where necessary, this makes that use Radio Link control (RLC) affirmation mode (AM) is more efficient, retransmits to be higher than FEC mechanism usually aspect radio efficiency, in FEC mechanism, sends additional parity block always.Therefore, on the dedicated logical channel such as point-to-point (PTP), needn't add parity block to the MBMS load data.
Fig. 7 A and 7B show the embodiment of the protocol architecture of Access Layer, and it comprises forward error correction (FEC) layer 157 that is arranged on Radio Link control (RLC) layer 150.The back also will be described the embodiment of forward error correction (FEC) layer in conjunction with Figure 11.
Forward error correction (FEC) layer 157 directly receives user plane information 163 by the user plane wireless carrier.Because forward error correction (FEC) layer is positioned on Radio Link control (RLC) layer, so FEC protocol Data Unit (PDU) is corresponding to RLC service data unit (SDU).The FEC layer preferably supports any SDU size (integral multiple that is limited to 8 bits), variable bit rate information source, from the out of order reception of the grouping of low layer with from the reception of the repeated packets of low layer.The integral multiple that FEC PDU size can be limited to 8 bits.
Then, can transmit encoder packet (EP), to generate parity rows by the foreign key encoder.FEC layer 157 is by providing the function of Reed-Solomon (RS) encoder in UMTS Terrestrial radio access network (UTRAN) 20, can carry out external encode, and by the function of Read Solomon decoder is provided in subscriber equipment (UE) 10, can carry out external decoder, also will make more detailed description to this below in conjunction with Fig. 9 A.
Can add the parity rows that external encoder produces in the encoder packet (EP) to, and insert in the transmission buffer, as one group of internal block.Thereby each internal block all has the information that wherein produces protocol Data Unit (PDU) of adding to.Then, can transmit this group PDU.
This FEC layer 157 can also recover to belong to the data of single EP, even the different internal blocks of receiving are from different honeycombs.This can realize by send sequence number in the header of each protocol Data Unit (PDU) (SN).In one embodiment, system frame number (SFN) helps relative coding device grouping (EP) to keep data calibration.For example, also will make more detailed description to running through sequence number in full below in conjunction with Figure 10 A and 10B.
In the embodiment shown in Fig. 6 to Fig. 7 A, forward error correction (FEC) layer 157 (for example is positioned between packet data convergence protocol (PDCP) layer 156 and Radio Link control (RLC) layer 150, be in identical layer with the BMC layer, and under packet data convergence protocol (PDCP) layer).By forward error correction (FEC) layer 157 just is arranged on Radio Link control (RLC) layer 150, can optimize the performance of foreign key, because the internal block size is complementary with " golden (gold) " grouping dimension of grouping by wireless transmission.Yet, should be understood that forward error correction given here (FEC) layer only has restricted meaning for purpose of explanation and not.For its header-compressed ability, can on forward error correction (FEC) layer 157, use packet data convergence protocol (PDCP) layer 156.Should be noted in the discussion above that packet data convergence protocol (PDCP) layer 156 is to transmit current definition for the point-to-point (PTP) that uses dedicated logical channel.Shown in Fig. 7 B, forward error correction (FEC) layer can be arranged in Access Layer Anywhere, on Radio Link control (RLC) layer or in the application layer.Forward error correction (FEC) layer can on packet data convergence protocol (PDCP) layer or under.If carry out FEC in application layer 80, then it is equally applicable to GSM and WCDMA, even if " gold " grouping dimension difference of these two.
The foreign key design
New forward error correction (FEC) layer can be carried out external encode to user plane information.Block of information 91 among Fig. 8 and outside code block 95 show the notion of external block code structure.Fig. 9 A shows the example that how the foreign key block structure is applied to multimedia broadcast multicast service (MBMS) data 91.When the content that postpones was tolerated in broadcasting in whole honeycomb, external encode can improve the physical layer performance.For example, foreign key can help avoid the honeycomb transition period and in the loss of data of putting the transition period between multiple spot (PTM) transmission mode and point-to-point (PTP) transmission mode.
The exemplary coding structure that Fig. 9 A provides is called Reed-Solomon (RS) block code.Reed-Solomon (RS) sign indicating number can be used to detect and the correction channel mistake.Foreign key shown in Fig. 9 A is that (wherein, each Reed-Solomon (RS) code sign comprises the information with a byte of row and column definition for n, k) block code in a system.Each row comprises a Reed-Solomon (RS) code word.If recover n grouping of losing, then need n parity block at least.Therefore, when the quantity of parity block increased, required memory space also increased.In Reed-Solomon (RS) coding, can add N-k parity character to k system symbol, thereby produce a code word.In other words, a code word of Reed-Solomon (RS) sign indicating number [N, k] has k information or " system " symbol and N-k parity character.N is a code length, and k is a yard dimension.For every k information byte, this coding produces n code sign, and preceding k code sign wherein is identical with information symbol.Every row can be called as one " internal block ", and represents the load in each Transmission Time Interval (TTI).In the WCDMA of routine system, for example, can on the basic WCDMA structure of 20 milliseconds of frames (TTI), transmit.Parity character can be used generator matrix G
K * NFrom system symbol, derive, as give a definition:
m
1 * kG
K * N=c
1 * N(formula 1)
m
1 * k=information word=[m
0m
1... m
K-1] (formula 2)
c
1 * N=code word=[c
0c
1... c
K-1] (formula 3) wherein, m
i, c
iBelong to any Galois Field (Galois Field).For example, if the symbol of a Reed-Solomon (RS) code word is a bit, then two-dimentional Galois Field (GF (2)) will be used to describe decode operation.In one embodiment, if symbol is a byte, and then the Galois Field GF (256) of 256 dimensions can be used for describing decode operation.In this case, each information row comprises a byte in every row.Each information is listed as available one [N, k] Reed-Solomon (RS) sign indicating number and encodes in two-dimentional Galois Field (GF (2)).If every row has M byte, then to outside block encoding M time.Therefore, each external block 95 has N*M byte.
The deletion information decoding
The foreign key structure can be carried out deletion information (erasure) and be proofreaied and correct.Make mistakes if which symbol decoder has known, then rebuilding the system symbol of makeing mistakes needs less amount of calculation.Encoder packet (EP) or matrix refer to the whole data set of the output of external encoder.Take out redundant information by row ground from every row, every provisional capital of being transmitted is additional one, must check that CRC is to guarantee that data are correct transmissions.For the MBMS transmission, all must use CRC in each transport channel block, whether make mistakes to show internal block 91, if the CRC failure can think that then all symbols in this piece have all been made mistakes.In one embodiment, if given internal block 97 is made mistakes, then can delete all bits of this piece.Belong to each symbol in the piece of makeing mistakes that " deletion information " refer to CRC failure.The symbol that is not deletion information can be considered to correct.Ignore the probability that CRC does not detect mistake, each Nx1 row comprises the correct symbol and the symbol of deletion.
Receiving vectorial r can be expressed as:
r
1 * N=[c
0, e, e, c
3, e, c
6, c
8... c
N-1] (formula 4)
Wherein, e represents deletion information.
Deletion information coding can be proofreaied and correct maximum N-k and go out mismark.Because be not that the symbol of deletion information can be considered to correct, so the error correction characteristic of RS sign indicating number is much better than typical R S sign indicating number usually.The size of the CRC that uses in each internal block should be no more than the probability of residue external block even as big as the probability of guaranteeing undetected mistake.For example, if that use in the internal block is the CRC of 16 bits, the lower bound that then remains the external block error rate will be 2
-16=1.5.10
-5If be free from mistakes in the preceding k internal block, then do not need to carry out the RS decoding, because system symbol is identical with information symbol.
In case should be noted in the discussion above that and receive k piece, just can carry out the decoding of external block immediately, and not wait for all N of reception internal block with good CRC.In order to carry out the deletion information decoding, by deleting all and deletion or unnecessary corresponding row, can be from generator matrix G
K * NThe amended generator matrix Ω of middle derivation
K * k, for example, have only preceding k good receiving symbol to can be used for identifying amended generator matrix Ω
K * kOriginal information word m can come out in following recovery:
m
1 * k=[Ω
K * k]
-1. r
1 * k(formula 5)
Wherein, r
1 * kBe amended reception vector, it obtains with preceding k good symbol.Therefore, deletion information decoding complexity can be reduced to k * k matrix inversion.So, use RS deletion information decoding can greatly simplify the computation complexity of RS decoding.
Packing data is to the influence of outside code performance
Just as being discussed below with reference to Figure 11-13, if the amount of information of filling up and the expense by wireless transmission by the restriction of particular outer encoding mechanism, then external encode can combine use with the variable Rate data source, and can not cause too big expense.In the said external encoding mechanism, can pack the data to the piece of intended size, and the Reed-Solomon sign indicating number of a shortening can pass these pieces.Can be according at least two kinds of different modes, with the into TTI that packs of the grouped data behind the coding, with reference to Fig. 9 A and 9B this is described below.
Fig. 9 B is the schematic diagram of the outer sign indicating number code block structure of Fig. 9 A, wherein can send multirow in each Transmission Time Interval (TTI).According to a further aspect in the invention, transmit in a TTI from the data of delegation.In another embodiment, be placed among the TTI from the data of an encoder packet (EP), thereby each TTI comprises the data from this encoder packet (EP).Therefore, every provisional capital can be an independently transmission in WCDMA frame or the Transmission Time Interval (TTI).The every row of transmission will provide more performance in a TTI.In Fig. 9 B, k and n are divided by by the line number in each TTI, and the error in the delegation can all be shut away mutually.When observing the relative TTI error rate of EP error rate, this produces evident difference.
Fig. 9 C is the schematic diagram of the outer sign indicating number code block structure of Fig. 9 A, wherein sends each row in a plurality of Transmission Time Intervals (TTI).Should be understood that Fig. 9 C shows and send every capable encoder packet (EP) in four TTI (TTI0-TTI3), but in fact, every provisional capital can send by any amount of TTI.Because every row all are foreign key code words, so each in four different transmit stages (TTI0-TTI3) all obtains an independently foreign key.In order to recover whole group, must be correctly to all these independently foreign key decode.
Figure 10 A and 10B are the schematic diagrames by the outside code block of forward error correction layer generation.
By adding parity rows or pieces 93 to MBMS load data 91, can be public or put and use the FECc pattern to make up outside code block 95 on multiple spot (PTM) logic channel.Each external block 95 comprises a plurality of internal blocks 91,93.By the sequence number of identification internal block and with respect to the position of encoder packet, each available internal block can be put into correct position, thereby can correctly carry out external decoder.In one embodiment, each internal block comprises header 94, and it identifies internal block with internal block numbering m and external block numbering n.For example, external block n comprises: data division 91 has m inner multimedia broadcast multicast service (MBMS) load piece; Redundancy section 93 has the individual inner parity block of M-(m+1).According to this embodiment, the serial number space of MBMS can be optimized, and can be defined by a plurality of different sequence numbers, as 0 to 127.Serial number space should be enough big, thereby, after the reception that the conversion of any kind causes is interrupted, identical sequence number can not appear.Receive the order that UE should determine internal block, even if under the situation of some lost block.Can't be discerned by whole serial number space if the internal block that UE loses is too many, then UE can't correctly resequence to internal block.In FECd piece and FECc piece, the sequence number of identical inner piece is identical.The FECd piece does not comprise the redundancy section 93 that uses among the FECc.FECd entity and FECc entity can use by wireless identical bit.
Transmitting terminal
Sending forward error correction (FEC) entity 410 comprises: service data unit (SDU) buffer 412 is used to receive SDU; Cut apart and be connected in series unit 414; External encoder 416, it carries out Reed-Solomon (RS) coding; Sequence number maker 418, its PDU to coding adds sequence number; Transmission buffer 420, it sends PDU by logic channel 406; Scheduling unit 422.
Service data unit (SDU) buffer 412 passes through wireless carrier 402, receiving subscriber data (FEC SDU), and its form is service data unit (SDU), as shown by arrows, and storage is from the FEC SDU of high level.Reception buffer 412 tells how many data scheduling unit 422 will transmit.
As mentioned above, the time quantum that fills up the required cost of encoder packet (EP) changes usually, because the information source data rate changes usually.As shown in figure 13, if can determine when the beginning packing data neatly, then can improve the frame charging efficiency.Jitter toleration based on receiving FEC entity 430 by postponing the establishment of EP as much as possible, can reduce the amount of information of being introduced of filling up.
The best row sizes of scheduling unit 422 preferred decision EP or protocol Data Unit (PDU), thus make SDU just in time fill up the row (for example 12) of these quantity.Certainly, scheduler 422 also can be selected the FEC PDU size that will cause minimum to fill up from those sizes of RRC configuration, and request cuts apart and be connected in series functional unit 414 SDU is formatted into the k piece, is of a size of PDU_size_FEC_Header_size.This format can change.Below with reference to Figure 12-13 dissimilar formative examples are discussed.The data total amount of considering should comprise the expense that is added by serial connection and dividing function unit 414.In order to generate encoder packet (EP), scheduler 422 request serial connections and dividing function unit 414 produce the PDU of k this size.This size comprises shuffling information.In one embodiment, the size of PDU can be the integral multiple of 8 bits, and the data of continuous P DU are corresponding to distinct symbols in the code word.
Then, this k PDU piece can pass through external encoder 416, and the latter carries out Reed-Solomon (RS) coding.By generation and additional redundancy or parity information in encoder packet (EP) matrix, the data in 416 pairs of encoder packet of external encoder (EP) matrix are encoded, thereby create outside code block.In one embodiment, can the case of external sign indicating number be (n, a n-k parity block of k) deletion information decoding block code, and external encoder generation.Encoder is encoded to the capable information and executing of k of equal length, and the protocol Data Unit (PDU) of n this size is delivered to lower sublayer.Preceding k piece is identical with the piece that its receives, and the n-k of a back piece is corresponding to parity information.
Different base station (or different transmission mode, PTP, put multiple spot (PTM)) the identical content stream of transmission, but the not calibration of these streams.Yet if the encoder packet of these data flow (EP) form is identical, each stream is identical for information about.By adding sequence number to each external block, subscriber equipment (UE) can combine two streams, because subscriber equipment (UE) is known the relation between these two streams.
Forward error correction (FEC) header format
As mentioned above, data flow can realize that described sequence number comprises the information that is associated with the PDU ordering by introducing sequence number synchronously.Except rearrangement and duplicate detection, sequence number can also be recalibrated the data from the corresponding information source that comprises in each encoder packet.This sequence number can clearly identify the order that each grouping should be considered.This sequence number can constitute one " FEC header ", after carrying out coding, it can be added in information loads unit (PDU) and the parity block.Sequence number should not protected by foreign key, because it need be used for decoding.
Figure 14 shows an embodiment of forward error correction (FEC) header format.For the ease of with data and encoder packet (EP) calibration, can cut apart sequence number, to comprise: reserved part (R) 402; Encoder packet (EP) part 404, it identifies this EP (EPSN); The position of specific internal piece (IEPSN) 406 in the additional encoder packet, its tag encoder data.
Desired is that FEC layer 400 can be controlled (RLC) pattern interoperability with all Radio Links.Because Radio Link control (RLC) AM and Radio Link control (RLC) UM require service data unit (SDU) to be of a size of the integral multiple of 8 bits, so FEC layer 400 also should be followed this requirement.Owing to FEC layer 400 is worked based on the byte size increment of data, so also to need be the integral words joint to encoder packet (EP) row size.Therefore, FEC header size 401 also should be the integral multiple of 8 bits, so that Radio Link control (RLC) can be accepted FEC protocol Data Unit (PDU) size.In one embodiment, forward error correction (FEC) header size 401 is bytes, and wherein, reserved part (R) 402 comprises a bit, the part (EPSN) 404 of sign EP comprises 3 bits, and IEP part (IEPSN) 406 of the PDU position in the tag encoder grouping comprises 4 bits.In this embodiment, used the sequence number of 8 bits, because, wish that a PDU sends in each TTI, and because the transmission opportunity deviation of not wishing different honeycombs is above 100 milliseconds.
Receiving terminal
Still, receive forward error correction (FEC) entity 430 and comprise: reception buffer/rearrangement/repetition detection unit 438 with reference to Figure 11; Sequence number is removed unit 436; Outer decoder 434, it carries out Reed-Solomon (RS) decoding; Recomposition unit/service data unit (SDU) transmission buffer 432.
The information row of EP matrix is corresponding to PDU.In order to support external encode, before triggering external decoder, receive the FEC PDU of forward error correction (FEC) entity 430 accumulation somes.In order to realize continuous reception, although need decode to encoder packet, the protocol Data Unit (PDU) that subscriber equipment (UE) buffer memory enters is carried out decoding simultaneously.
Because some piece may can be dropped in transmission course, and because different data streams may have different delays, so, receive forward error correction (FEC) entity 430 and carry out duplicate detection, and the piece that in reception buffer/rearrangement/repetition detection unit 438, will receive possibly rearrangement.Can use the sequence number in each FEC protocol Data Unit (PDU), assist to resequence/duplicate detection.In reception buffer 438, can use sequence number, the out of order data of receiving are resequenced.In case PDU is resequenced, repetition detection unit detects the repetition PDU in the encoder packet (EP), and removes all repetitions just based on sequence number.
Then, can remove sequence number.Sequence number is removed unit 436 and remove sequence number from encoder packet (EP), because sequence number can not be a part that sends to the piece of Reed-Solomon (RS) decoder.
Then, can be with data passes to external decoder functional part 434, with the information of recovering to lose.Outer decoder 434 received code devices groupings (EP), and, if necessary,, encoder packet (EP) is carried out Reed-Solomon (RS) decoding, thereby regenerate the row that all are made mistakes or lose by using parity information.For example, if comprise that all k protocol Data Unit (PDU) of information is not all correctly received or n PDU in be less than k and correctly do not received, be at most the protocol Data Unit (PDU) of odd even PDU size, so, can carry out external decoder, to recover the information PDU that loses.As long as carry out external decoder, it is available just to have at least one odd even PDU in receiver.If comprise that all k protocol Data Unit (PDU) of information is all correctly received or n PDU in be less than k and correctly received, then decoding is unnecessary.Then, message protocol data unit (PDU) can be delivered to recombination function parts 432.
No matter the external decoder success or not can be delivered to information row recomposition unit/functional part 432.Recomposition unit 432 is used length indicator (LI), according to the information row of encoder packet (EP), and reorganization or reconstruction SDU.In case SDU is successfully put together, protocol Data Unit (SDU) transmission buffer 432 is just by wireless carrier 440, and (SDU) passes to high level with protocol Data Unit.
In receiving forward error correction (FEC) entity 430, make UE postpone time offset between the decoding Different Logic stream, it is potential owing to lack the synchronous out of order Data Receiving that causes between the logic flow that system is made full use of.Like this, can make between transfer period and PTP and PTM between the service of transition period very level and smooth.How to allow UE with the time offset between the decoding delay Different Logic stream below with reference to Figure 15 discussion.
Encoder packet (EP) option: fixing or variable row size
Because protocol Data Unit (PDU) needn't send in each Transmission Time Interval (TTI) continuously, has certain flexibility so when FEC or external encode entity make up protocol Data Unit (PDU).Like this, can improve frame charging efficiency and reduction and fill up expense.
If necessary, the external encode entity can generate load at each Transmission Time Interval (TTI).Because can receive service data unit (SDU), can make up protocol Data Unit (PDU) in real time from high level.If it is not enough to make up the data of protocol Data Unit (PDU), then RLC can increase the information of filling up.
The encoder packet (EP) of fixing row size
When SDU 201-204 was encoded, desired was to reduce the amount of information of filling up that is transmitted as far as possible.
In one embodiment, the capable size of encoder packet (EP) matrix 205 is fixed dimensions.According to the priori of encoder packet (EP) matrix 205, data calibration can be got back to their original configuration.Because the capable size of the SDU 201-204 that sends knows in advance, so, as long as the data of receiving just can start transmission, see to send how many data and needn't wait.
The example of Figure 12 A shows the cataloged procedure of creating outside code block 214 according to data cell 201-204, and wherein, the capable size of outside code block 214 is fixed.In this example, the form of user data is a plurality of service data units (SDU) 201-204, and they comprise the bit block of arbitrary dimension, and its size depends on concrete application (video, speech etc.).
In order to transmit the FEC SDU of arbitrary dimension, can carry out in the FEC one-level and cut apart, be connected in series and fill up.Although strictly say, serial connection not necessarily lacks the obvious reduction that it will cause the high level data throughput.
Can be formatted into this fixedly PDU size to high-rise SDU 201-204 earlier.In this embodiment, cut apart/be connected in series the internal block that functional part generates fixed dimension, it can be indicated to subscriber unit.In step 220, this can be organized internal block and cut apart and be connected in series, and become the part of encoder packet matrix 205, it comprises: internal block; The information of filling up 208 of necessary degree; Length indicator (LI) 206 can be used for pointing to the end of service data unit (SDU) 201-204, ends in the given row of this EP to show what SDU.The external encoder of discussing below uses these internal blocks to generate redundant block.
In Radio Link control (RLC), length indicator (LI) shows the end of each service data unit (SDU) with respect to protocol Data Unit (PDU) rather than service data unit (SDU).This helps to reduce expense, because the PDU size is usually less than the size of service data unit (SDU).For example, length indicator (LI) can be used for showing last byte of each the FEC service data unit (SDU) that finishes in load data unit (PDU)." length indicator " can be arranged to the byte quantity between the ending of FEC header and last byte of FEC SDU section.Length indicator (LI) is preferably included among the PDU of this length indicator (LI) indication.In other words, length indicator (LI) preferably points to identical load data unit (PDU), and preferably the FEC SDU with length indicator (LI) indication has identical order.
When receiving external block, the information such as length indicator (LI) can be used for allowing receiver know where the service data unit (SDU) and/or the information of filling up start from and where end at.
Because can not indicate whether there is length indicator (LI) with a bit in the FEC header, so the FEC layer adds a fixed header in load, it indicates whether there is length indicator (LI).Inner header or LI provide and rebuild the required full detail of SDU 201-204.LI can be included among the RLC-PDU of its indication.The mark that whether exists first LI to comprise in can the sequence number header by RLC-PDU is indicated.Bit among each LI can be used to indicate its expansion.For the length that makes length indicator (LI) changes with FEC PDU, can introduce a new particular value for a byte length designator (LI), to represent that last SDU also differs from a byte and just can fill up last PDU.Length indicator (LI) exists bit to realize with multiple mode, introduces wherein two kinds below.
In one embodiment, can in each protocol Data Unit (PDU), provide a length indicator (LI) to have bit.For example, can add a byte at the place that begins of each encoder packet (EP) row, a bit in this byte represents whether there is LI.Can reserving for " there is bit in this " all of first byte of each protocol Data Unit (PDU).Have bit in order to hold this, the length indicator data can shorten 1 bit.By in each protocol Data Unit (PDU), providing one to have bit, when EP decoding failure, also can decode, even if first PDU loses to SDU.This can reduce residual error-rate.In each PDU, provide and exist bit can realize real-time serial connection/cut apart.
In another embodiment, can in first PDU, provide length indicator (LI) to have bit.Do not add expense, but begin to locate to add the bit that exists of all k information PDU at first PDU of this EP at the place that begins of each PDU.When having very big SDU and/or very little PDU, provide and have bit at the place that begins of encoder packet (EP), can reduce expense.
After cutting apart and being connected in series, EP 205 comprises multirow, these row by among a plurality of service data units (SDU) 201-204 at least one and fill up piece and take.Can design the capable size of external block, thereby, in a Transmission Time Interval (TTI), transmit each row with peak data rate.Service data unit (SDU) can not be calibrated with the data volume of transmission in the Transmission Time Interval (TTI) usually.Therefore, as shown in figure 11, the 2nd SDU 202 and the 4th SDU204 are not filled in respectively in the first and second row Transmission Time Intervals (TTI) of EP.In this example, EP has 12 row to can be used for data, four SDU 201-204 can be bundled in the first three rows of these 12 row.The remaining row of EP 205 can take by filling up piece 208.Therefore, can cut apart second SDU 202, thereby, make the first of second service data unit (SDU) 202 start from first row of block of information, the second portion of second SDU 202 ends in second row.Equally, can cut apart the 3rd SDU, thereby, make the first of the 3rd service data unit (SDU) 203 start from second row, the second portion of the 3rd SDU 203 ends in the third line.The 4th service data unit (SDU) 204 filled out in the third line, and the remainder of the third line can be filled with filling up piece 208.In this example, encoder packet (EP) 213 mainly constitutes by filling up information 208.
Encoder uses this EP to generate redundancy or parity information.In step 240, by adding outside parity block 214, encoder is encoded the grouping matrix 205 of centre, thereby generates outside code block 213, and its length is 16.Encoder extracts 8 Bit datas from every row of every, thereby creates result data 210.Reed-Solomon (RS) encoder is encoded to result data 210, thereby obtains four lines redundancy or parity information 212.Parity information 212 can be used to generate outside parity block 214, can add outside parity block 214 in the EP matrix 205 to, thereby generate 16 outside code blocks 213.
Figure 12 B shows the example by the above-mentioned information of wireless transmission.In step 160, after the every row interpolation to EP 205 comprised the additional overhead of sequence number, these 16 outside code blocks 213 can pass through wireless transmission as protocol Data Unit (PDU) 214.Do not transmit whole encoder packet (EP) matrix 213 in the protocol Data Unit that on down link, sends (PDU) 214.On the contrary, protocol Data Unit (PDU) comprises the length indicator (LI) 206 of information bit 201-204 and encoder packet (EP) matrix 213.Because the capable size of encoder packet (EP) 213 is fixed, and therefore, is known in receiver, so, needn't fill up information 208 by wireless actual transmissions.Fill up information 208 not by downlink transmission, because the value of filling up is known, so, needn't transmit the information of filling up 208.For example, if the information of filling up is made of known bit sequence, as complete 0, complete 1 or 0 and 1 alternate mode, then receiver can be filled protocol Data Unit (PDU) 214, reaches specified encoder packet (EP) 213 row sizes at most.Therefore, during the transmission, need not select the PDU size to equal the capable size of EP, can use the minimum available EP size of all information bit 201-204 of carrying and reorganization expense (as LI) 206.
Although the capable size of encoder matrix is fixed, when each the transmission, can from given set, select FEC PDU size, thereby, make each all message part that all comprise an encoder matrix row (can get rid of filling information).When the size of the PDU that receives during less than encoder matrix row size, UE can fill up this size with known bit sequence.Like this, the internal block size is maintained fixed, and does not increase the burden on the air interface.Therefore, by using the encoder packet (EP) 213 of fixing row size, needn't wait until that before all data can use beginning to send protocol Data Unit (PDU), and can send the information of filling up.
If handle the variable Rate transmission with the algorithm of realizing above, then can use the speed equilibrating mechanism, wherein, all encoder packet row matrixs have constant dimensions.When the information of filling up constitutes PDU a part of, can use less PDU.The information of filling up can be made of specific bit sequence, and can be positioned at the end of data.In receiver, by the additional information of filling up endways, the size of the piece that receives from low layer can be averaged in to the fundamental line size.
If use predetermined bit sequence to fill up, then this filling information is without wireless transmission.Receiver needn't be known actual encoder packet row size, unless receiver need be carried out external decoder.Basic SDU reorganization does not need to know the amount of information of filling up that is positioned at the PDU end.If received all PDU that comprise from the information of a preceding k encoder packet (EP) row, then external decoder is unnecessary.By contrast, if at least one PDU that comprises from the information of a preceding k encoder packet (EP) loses, then need at least one to comprise PDU from the data of a parity rows.Because parity rows is not filled up usually, so for the actual coding device grouping dimension of needs supposition, this size can be used as reference.
Variable row size encoder packet (EP)
Figure 13 shows the cataloged procedure of creating the outside code block 313 with variable row size.
Of the present invention this relates on the one hand to carry out external block coding flexibly by the data of wave point transmission.This cataloged procedure can reduce the information of filling up of transmission, thereby improves the frame charging efficiency.Encoder packet (EP) 305 row can be variable-sized, and, in each Transmission Time Interval (TTI), can send the external block of different size.Under the preferable case, the capable size of encoder packet (EP) 305 changes, thereby, make SDU just in time fill up the row of these quantity (as 12) of encoder packet (EP) 305.In this embodiment, before making up EP, it is available that the FEC layer must wait for that all data become, thereby FEC can determine best row size.Can from a plurality of different sizes, select the row size, thereby information be filled up in restriction based on available data volume.The capable dimension chain of encoder packet (EP) can be received the PDU size set of disposing for S-CCPCH.The data volume that can use when generating encoder packet 305 as required can select to produce the capable size that minimum is filled up information.By reducing the size of external block 313, thereby make the piece size in every frame littler, can send data, because the data that send by the identical TTI duration are less according to lower transmission rate.Use the variable row size of encoder packet (EP) 305, help firm power requirement in all transmission of encoder packet (EP), and utilized parity overhead 314 still less.This embodiment is applicable to such as the point in the systems such as WCDMA and transmits to multiple spot (PTM) that wherein, the transport block size that following wireless protocols allows to send in each Transmission Time Interval (TTI) changes.
In step 320, a plurality of service data units (SDU) 201-204 can be cut apart and is connected in series, thereby generate an encoder packet (EP) matrix 305, wherein, length indicator (LI) 206 is used in reference to the end to service data unit (SDU) 201-204.Length indicator (LI) can be included in last column that each service data unit (SDU) stopped.
In step 330, on the basis of row,, generate redundancy or parity information by from each data block, extracting the data of 8 bits, gained data 310 can be sent to Reed-Solomon (RS) encoder, thereby obtain parity information 312.Because the row of encoder packet (EP) matrix 305 is smaller, so can produce less redundant information.
In step 340, coding continues, and parity information 312 is used for generating the outside parity block 314 that can add 12 block encoders grouping (EP) matrix 305 to, thereby generates an outside code block, and its length is 16 in this example.This embodiment has avoided filling up message transmission, and this has improved transmission performance, because whole code block 313 is taken by SDU, length indicator (LI) 206 and/or redundant information 314.In this concrete example, do not need to fill up.But, should be understood that, in some cases, because the quantity of the configuration sized of PDU is limited, thus need some to fill up information, but just need more a spot of information of filling up.Like this, can improve the frame charging efficiency, can also divide into groups in whole encoder to keep more stable power in (EP).In the cdma system that uses power control scheme, this is desired.
Although do not show among the figure, the mode of discussing in conjunction with the step 260 of Figure 12 above PDU is similar to by Wireless transmission mode.
Figure 11 is an embodiment of external encode or forward error correction (FEC) layer 400, has RLC not have affirmation mode (UM)+entity (RLCUM+) on Radio Link control (RLC) layer.Usually, Radio Link control (RLC) provides the framing operation for high level.Here, the FEC layer that is positioned on the Radio Link control (RLC) is carried out the framing operation.
External encode layer 400 comprises that sends forward error correction (FEC) entity 410, and it, communicates with reception forward error correction (FEC) entity 430 via logic channel 406 by wave point (Uu) 404.
Rearrangement/duplicate detection
Figure 15 is rearrangement agreement or algorithm, and it can make mobile radio station 10 with the time offset between the coding delay Different Logic stream.
Receive forward error correction (FEC) entity 430 and use sequence number, determine the position of given PDU in the EP matrix.For example, the position of the part of sequence number (PSN) sign PDU in encoder packet (EP).
This algorithm hypothesis: before can starting decoding, receive data at most from two encoder packet (EP).In the following description, encoder packet (EPd) is next encoder packet (EP) that will decode in order, and encoder packet (EPb) is the encoder packet (EP) that just is being buffered.Encoder packet (EPb) is being followed encoder packet (EPd).The UE that needs the complete encoder packet transmission time to carry out the RS decoding realizes carrying out twice buffer memory, thereby can decode to continuous grouping.Therefore, the n+k at least of the full-size row of UE storage coder matrix (k and n are respectively the quantity of information row and the total quantity that comprises the row of parity rows).UE with very fast Decode engine can reduce this requirement, but is not less than n+1.For example, grouping is required continuously based on its decoding capability reception if the cushion space of the specified quantitative of UE (XtraBffr) surpasses, and,, then under the situation that does not increase calculation requirement, 100 milliseconds of needs buffer sizes of decoding delay are increased by 800 bytes if adopt the stream of 64kbps.
In frame 1410, can judge whether to receive a new forward error correction (FEC) protocol Data Unit (PDU).If do not receive new forward error correction (FEC) protocol Data Unit (PDU), then flow process is restarted from frame 1410.If received new forward error correction (FEC) protocol Data Unit (PDU), then in frame 1420, can judge whether this new forward error correction (FEC) protocol Data Unit (PDU) belongs to next encoder packet that will decode in order (EPd).
If forward error correction (FEC) protocol Data Unit (PDU) does not belong to next encoder packet that will decode in order (EP), so, in frame 1421, judge whether this forward error correction (FEC) protocol Data Unit (PDU) belongs to the encoder packet (EPb) that just is being buffered.If this forward error correction (FEC) protocol Data Unit (PDU) does not belong to the encoder packet (EPb) that just is being buffered, so, in frame 1440, can abandon this protocol Data Unit (PDU).If this forward error correction (FEC) protocol Data Unit (PDU) belongs to the encoder packet (EPb) that just is being buffered, so, in frame 1423, protocol Data Unit (PDU) can be added to the relative position in the buffer of Epb.In frame 1425, can judge whether the data volume of Epb surpasses XtraBffr.Be no more than XtraBffr if judge the data volume of Epb in frame 1426, then flow process is restarted from frame 1410.If the data volume of Epb surpasses XtraBffr, then in frame 1428, sending entity attempts to send the whole SDU from Epd.Then, in frame 1430, the remainder of Epd can be from buffer, removed, in frame 1434, Epb Epd can be arranged to then.
Belong to Epd if in frame 1420, judge this forward error correction (FEC) protocol Data Unit (PDU), then in frame 1422, protocol Data Unit (PDU) can be added to the relative position in the buffer of EPd.In frame 1424, can judge whether buffer has k the independent PDU of Epd.If buffer does not have the independent PDU of k of Epd, then in frame 1426, flow process is resumed at frame 1410.If buffer has the independent PDU of k of Epd, then in frame 1427, decoder is carried out the external decoder of Epd, and in frame 1428, sending entity attempts to send the whole SDU from Epd then.Then, in frame 1430, the remainder of Epd can be from buffer, removed, then in frame 1434, Epb Epd can be arranged to.
Figure 16 shows the time relationship between the outside code block of mobile radio station reception when mobile radio station receives the point of cellular autofluorescence A 99 to transmit to multiple spot (PTM) and come the point of cellular autofluorescence B 99 to change between multiple spot (PTM) transmission.U.S. Patent application US-2004-0037245-A1 that is submitted to August 21 in 2002 by Grilli etc. and US-2004-0037246-A1 and done further instruction aspect some of Figure 16 by Willenegger etc. in the U.S. Patent application US-2003-0207696-A1 that submitted on May 6th, 2002 are so all incorporate it herein into way of reference.
Described situation satisfies specific UMTS Terrestrial radio access network (UTRAN) 20 and subscriber equipment (UE) 10 requirements.For example, send content in different honeycombs, then in adjacent cell, on the piece of carrying identical data or load, should use identical numbering if UTRAN 20 uses identical external block to encode.The transmitting time of external block with identical numbering is relatively consistent.Crossing over the maximum misalignment of the PTM transmission of these honeycombs is controlled by radio network controller (RNC) 24.The delay jitter of the point of the different honeycombs of UTRAN 20 control to multiple spot (PTM) transmission.UE 10 should decode to external block when receiving next piece.Therefore, the buffer space among the UE should preferably be held at least two external block 95A-95C, because hold the memory of a current external block of external block needs.Memory also should hold the multirow external block, if the external block during Reed-Solomon (RS) decoding, and, the time alignment between the compensation base station 22 inaccurate.
In honeycomb A 98, externally in the piece n 95A transmission course, conversion occurs between second inner multimedia broadcast multicast service (MBMS) load piece transmission period.Subscriber equipment shown in the arrow 96 (UE) 10 conversion from honeycomb A98 to honeycomb B 99 is not a level, because passed some times in the transition period.Before subscriber equipment (UE) 10 arrived honeycomb B 99, what sending was the 5th multimedia broadcast multicast service (MBMS) load data.Therefore, because the time of the time misalignment of respective transmissions and transition period passage, subscriber equipment (UE) 10 can miss second to the 4th.If in honeycomb B 99, receive enough pieces, then can decode to external block n 95A, because can use parity block to come the piece of reconstructing lost in the same old way.
After this, during sending external block n+295C, subscriber equipment (UE) 10 has experienced another time conversion from honeycomb B 99 to honeycomb A 98, and it betides the 5th multimedia broadcast multicast service (MBMS) the load piece of external block n+295C.In this case, the internal block that the transition period loses is less, so still can recover external block.
Use outside code block to help to reduce the probability of any service disruption.Recover work smoothly in order to ensure mistake, should on each transmission path, send identical piece, this means that the building mode of parity block in each transmission path should be identical.(multimedia broadcast multicast service (MBMS) load piece needs identical in each path, because this is a broadcast transmitted).Carry out forward error correction (FEC) in the superincumbent application layer 80 and help to guarantee that the parity block in each transmission path is identical, in forward error correction (FEC) layer 157, finish because encode, therefore all identical for each external block.By contrast,, for example, in each Radio Link control (RLC) entity 152, finish, then need some to coordinate, because the parity block in each transmission path is inequality if coding is finished at low layer.
From putting the conversion of name point (PTM) to point-to-point (PTP)
Figure 17 show when appearance point to the time relationship between the outside code block of mobile radio station 10 receptions during conversion between multiple spot (PTM) transmission and point-to-point (PTP) transmission.For example, scheme shown in Figure 17 is fit to utilize point-to-point (PTP) system for transmitting, as WCDMA and gsm system.
One aspect of the present invention relates to forward error correction, and between the PTM transmission period, this realizes to inner MBMS load or data block by adding parity information or piece.The outside code block of each that sends between the PTM transmission period comprises at least one internal load piece and at least one inner parity block.For example, when connecting from PTM, UE changes into that PTP connects or conversely the time when a honeycomb is transformed into another honeycomb or in the MBMS content is transmitted in unified service honeycomb, the error correcting capability of outside code block can obviously reduce, and losing of " load " perhaps in elimination or the transition period MBMS.
As mentioned above, given honeycomb can use PTP or PTM transmission plan to send to user 10.For example, the honeycomb that sends broadcast service under the PTM transmission mode usually can select to set up dedicated channel, sends (only to specific user 10) then under ptp mode, if the requirement for this service is reduced under the certain threshold in this honeycomb.Equally, usually, going up the honeycomb that sends content in dedicated channel (PTP) also can determine by broadcast channel to a plurality of user broadcast content.In addition, a given honeycomb may send content under the PTP transmission mode, and another honeycomb may send identical content under the PTM transmission mode.When mobile radio station 10 when a honeycomb is transferred to another honeycomb, perhaps, when the number of users in the honeycomb changes, conversion can occur, thereby trigger the change from PTP to PTM or from PTM to PTP.
Externally piece n 95A point is between multiple spot (PTM) transmission period, and conversion appears in the transmission course of the 4th inner multimedia broadcast multicast service (MBMS) load piece.Expression subscriber equipment (UE) is not a level from the slope of putting multiple spot (PTM) transmission and being transformed into the arrow 101 of point-to-point (PTP) transmission, because can pass some times in the transition period.When the conversion that occurs from PTM 101 to PTP, it is approximately identical that the wireless transmission bit rate keeps.The error rate of point-to-point (PTP) transmission is usually less than 1% (for example, during the transmission, a mistake or still less being arranged in per 100 load pieces).By contrast, in putting multiple spot (PTM) transmission, the error rate may be higher.For example, in one embodiment, the base station generates an external block in per 16 Transmission Time Intervals (TTI), and 12 among these TTI can be taken by the load piece, and 4 TTI can be taken by parity block in addition.Patient maximum quantity background block error be 4 internal blocks (12 basic block+4 parity block) in 16.Therefore, the maximum tolerance block error rate is 1/4.
When mobile radio station from putting multiple spot (PTM) transmission conversion 101 when point-to-point (PTP) transmits, may lose some internal block.Postulated point is transmitted in to multiple spot (PTM) transmission and point-to-point (PTP) has approximately identical bit rate in the physical layer, so, PTP transmission makes the transmission of MBMS load piece than PTM transmission block, because, on average, the ratio of the piece of re-transmission is usually less than the ratio of parity block.In other words, point-to-point (PTP) the transmission fast point of crossing far away usually is to multiple spot (PTM) transmission, because say that statistics the quantity of parity block retransmits the quantity of (Re-Tx) much larger than Radio Link control (RLC).Because changing 101 is to become fast a lot of usually point-to-point (PTP) transmission from putting multiple spot (PTM) transmission, so, when subscriber equipment (UE) 10 conversions 101 were transmitted to point-to-point (PTP), first multimedia broadcast multicast service (MBMS) load data was sent out.Therefore, the time misalignment of each transmission and the time of changing during 101 passage, can not cause any lose.Therefore, when from putting multiple spot (PTM) transmission when becoming point-to-point (PTP) transmission, in case in target cell, set up the PTP link, just can be by simple beginning to restart and remedy the load piece of losing from current external block.Transmit by the startup that begins, that is, use first internal block, can compensate by network from the same external piece.Then, network can recover because the delay that the conversion that the faster transmission of all external blocks causes is introduced.By reducing the loss of data of transition period, can reduce the MBMS content transmission interruption that such conversion may cause.
Then, externally between the PTP transmission period of piece n+2, another time conversion 103 to point to multiple spot (PTM) transmission mode has taken place in subscriber equipment (UE) 10.In Figure 12, (PTP) this conversion 103 of being transferred to some multiple spot (PTM) transmission from point to points occurs in last inner multimedia broadcast multicast service (MBMS) the load piece place among the external block n+2.In this case, except that last internal block, a lot of inner multimedia broadcast multicast service (MBMS) the load piece among the external block n+2 is sent out away.Under the situation that feedback is not provided, use FEC usually.Because dedicated channel is used in the PTP transmission, therefore, feedback capability is arranged on reverse link, so it is not very useful using FEC.In cross over transition, in order to reduce or eliminate loss of data, UMTS Terrestrial radio access network (UTRAN) 20 is preferably based on the low-residual block error rate of the RLC affirmation mode (AM) in the PTP transmission, recovers all internal blocks that may lose between the PTM transmission period being transformed into.In other words, can use the conventional second layer to retransmit, any grouping that detects mistake in original transmitted is retransmitted.Therefore, as shown in figure 17, do not need parity block in the PTP transmission.If the load piece goes wrong in point-to-point (PTP) transmission course, then needn't decode, because Radio Link control (RLC) will all pieces of makeing mistakes of request retransmission to external block.That is to say, when mistake occurring between the PTP transmission period, mobile radio station 10 request retransmission, perhaps, thus when piece is all correct, do not retransmit, and can utilize transformat zero (TF0).External encode is preferably finished in the second layer of protocol stack, thereby, make the size of each internal block 97 just in time insert a Transmission Time Interval (TTI), because this can improve code efficiency.
If forward error correction (FEC) external encode is to finish in the high level of protocol stack, for example, in application layer, then send parity block, and no matter transmission plan (point-to-point (PTP) or put multiple spot (PTM)).Therefore, also can add parity block to point-to-point (PTP) transmission.
As mentioned above, needn't use parity block in the PTP transmission, retransmission scheme replaces forward error correction because can use more efficiently.Owing to do not send parity block in the PTP transmission under the preferable case, so on average, all the transmission of external block is faster than PTM, the assumed wireless transmission bit rate is identical.Like this, UE just can compensate from putting the interruption that multiple spot (PTM) is caused to point-to-point (PTP) conversion, predicts the PTP transmission because can transmit according to PTM.Subscriber equipment (UE) can correctly recover external block, and by making up following piece: (1) in new honeycomb or after the conversion, the internal block that receives in point-to-point (PTP) transmission; (2) in old honeycomb or before the conversion, the internal block that in putting multiple spot (PTM) transmission, receives.Subscriber equipment (UE) can make up the internal block of receiving after internal block of receiving before the conversion and the conversion (they belong to the same external piece).For example, subscriber equipment (UE) 10 can combine inside multimedia broadcast multicast service (MBMS) load piece among the external block n+2 that receives by point-to-point (PTP) transmission and inside multimedia broadcast multicast service (MBMS) load piece that transmits to multiple spot (PTM) among the external block n+2 that receives by point.UMTS Terrestrial radio access network (UTRAN) 20 according to the transmission on the PTM link slightly " prediction " be sent to reception from the transmission of all users' of PTP link MBMS content external block, can make this processing more smooth.
Because UTRAN transmits the transmission of predicting external block according to PTM, so the bumpless transfer from PTP to PTM is possible.Therefore, it also is seamless crossing over the transmission of honeycomb border and/or the MBMS content between the different transmission schemes such as PTM and PTP." time expection " available internal block quantity is represented.When subscriber equipment (UE) 10 was transformed into the PTM transmission, even there is not communication link in change-over time, subscriber equipment (UE) 10 may be lost the internal block of " time expection " quantity at most, and can not injure the quality of reception of MBMS.If directly starting MBMS in PTP, UE receives, then UTRAN can use " time expection " immediately when PTP transmission beginning, because expecting at leisure by avoiding sky internal block (TF0), UTRAN 20 reaches the transmission of external block till the internal block of required " time expection " quantity up to this expection.From this point, UTRAN can keep " time expection " constant.
In putting multiple spot (PTM), can not rely on UE particular feedback information available in the radio network controller (RNC).In point-to-point (PTP) transmission, UE 10 can inform the numbering of RNC correct last external block that receives before conversion.This should be applicable to (from PTM or from PTP) any conversion to PTP.If it is acceptable that this feedback is not considered to, UTRAN 20 last external block that can estimating user equipment (UE) 10 before state exchange, may receive then.This estimation can based between the different cellular transmission predictable maximum time error, and, based on current that sending or in target cell the very wide external block that will send.
Forward error correction (FEC) can be carried out, thereby all pieces that the transition period loses can be recovered.Can reduce the probability of transition period contents lost like this, thereby realize " seamless " conversion.This scheme is supposed when identical external block conversion of (PTP) transmission to point to multiple spot (PTM) from point to points to take place when each information source is transmitted, and this takes place under the situation of the duration of supposing external block with respect to the duration of changing usually.
Memory space among the UE 10 can be traded off with accuracy time calibration of the PTM transmission of crossing over adjacent cell.By relaxing, can improve the time accuracy of PTM UTRAN 20 transmission to the memory requirement in the subscriber equipment (UE) 10.
Figure 18 shows from the transmission of the point-to-point (PTP) of radio network controller (RNC) A with the time relationship between the outside code block that mobile radio station 10 receives in from conversion between point-to-point (PTP) transmission of radio network controller (RNC) B or repositioning process.Term " RNC " can use interchangeably with term " base station controller (BSC) ".During " reorientation ", subscriber equipment (UE) 10 transmits from the point-to-point (PTP) that point-to-point (PTP) transmission by the content stream the zone of a RNC A 124 controls is transformed into by the same content stream in the zone of the 2nd RNC B 224 controls.Can use re-transmission (re-Tx) to compensate the MBMS load piece that all are lost.(PTP) is similar to the soft handover or the direct-cut operation of version 99 to the executive mode of the direct conversion of point-to-point (PTP) from point to points between honeycomb.Even without the cooperation between two RNC A, the B, Target RNC A 124 also should calculate the nearest complete external block that UE10 receives.This estimation may be based on the opportunity of the MBMS content that is received on Iu interface 25 by RNC 24.When using the PTP transmission, RNC 24 can remedy initial delay, and the MBMS content does not have any part and loses, and does not need the SRNS reorientation that can't harm.
Although it will be appreciated by those skilled in the art that the orderly flow chart that drawn for ease of understanding here, in actual implementation, some step can be carried out concurrently.In addition, unless clearly indication, method step can exchange, and does not depart from protection scope of the present invention.
It will be appreciated by those skilled in the art that information and signal can represent with multiple different technologies and method.For example, data, instruction, order, information, signal, bit, symbol and chip voltage available, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any of mentioning in the specification in the above represented.
Those skilled in the art can understand that also various exemplary box, module, circuit and the algorithm steps of describing in conjunction with the disclosed embodiments all can be implemented as electronic hardware, computer software or the combination of the two here.In order to be clearly shown that the interchangeability between the hardware and software, more than various exemplary assembly, frame, module, circuit and steps are all carried out generally description with its functional form.This functional be to realize or realize depending on the design constraint that specific application and whole system are applied with software with hardware.Those skilled in the art can realize described functional at each specific application in many ways, and still the result of this realization should not be construed as and causes deviating from scope of the present invention.
Utilize general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logical devices, discrete gate or transistor logic, discrete hardware components or the combination in any among them, can realize or carry out various exemplary logic diagram, module and the circuit described in conjunction with embodiment disclosed herein.General processor may be a microprocessor, but in another kind of situation, this processor may be processor, controller, microcontroller or the state machine of any routine.Processor also may be implemented as the combination of computing equipment, for example, and the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor or any other this kind structure in conjunction with the DSP core.
In conjunction with the step of described method of embodiment disclosed herein or algorithm can directly be presented as hardware, the software module carried out by processor or the combination of these two.Software module may be present in the storage media of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM or any other form well known in the art.The coupling of a kind of exemplary storage medium and processor, thus make processor can be from this storage media read message, and can be to this storage media write information.In replacing example, storage media is the part of processor.Processor and storage media may be present among the ASIC.This ASIC may be present in the subscriber station.Replace in the example at one, processor and storage media can be used as the discrete assembly in the subscriber station and exist.
The foregoing description of described disclosed embodiment can make those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.For example, although point out that at specification wireless access network 20 can realize with universal land radio access web (UTRAN) air interface, but, in the GSM/GPRS system, Access Network 20 may be GSM EDGE Radio Access Network (GERAN), perhaps, under situation between system, it may comprise the honeycomb of UTRAN air interface and the honeycomb of GSM/EDGE air interface.Therefore, the embodiment that the present invention is not limited to illustrate here, but consistent with the widest scope that meets principle disclosed herein and novel feature.
The part of patent document disclosure comprises material protected by copyright.Facsimile copy when the copyright owner does not oppose that patent file or patent disclosure appear in patent and trademark office's patent document or the record but keeps all copyright rights whatsoever in other cases.
Claims (70)
1, a kind of external encode entity that provides on Radio Link control (RLC) layer comprises:
The point of destination comprises receiver; And
Initiator comprises transmitter, and described transmitter, communicates with described receiver via common logical by wave point.
2, external encode entity as claimed in claim 1, wherein, described transmitter comprises:
First buffer is used to store multirow user profile;
Scheduling unit is used for:
Determine the maximum duration before needs send outside code block,
Based on the amount of stored user information in described first buffer, determine the optimum size of block of information, this optimum size makes described multirow user profile take described block of information in the mode of the not filling part that reduces described block of information, and
Generate a request, to start the coding of described multirow user profile;
Cut apart and be connected in series the unit, in response to request from described scheduling unit, described multirow user profile is cut apart, to be fit to have the described block of information of described optimum size, and, generate length indicator in each block of information, described length indicator is represented the end with respect to delegation's user profile of this block of information; And
External encoder uses described block of information, generates the redundant block of desiring to add in the described block of information, to produce outside code block.
3, external encode entity as claimed in claim 2, wherein, when running up to a certain amount of user plane information, described scheduling unit begins coding.
4, external encode entity as claimed in claim 2, wherein, when the block transmission delay time expired, described scheduling unit began coding.
5, external encode entity as claimed in claim 2, wherein, described transmitter also comprises:
The sequence number maker is used for adding header outside each block of information, and wherein, described header comprises the sequence number that is used to identify the order that each block of information is considered.
6, external encode entity as claimed in claim 5, wherein, described sequence number comprises the part that is used to identify the part of described outside code block and is used to identify the position of described each block of information in described outside code block.
7, external encode entity as claimed in claim 5, wherein, described transmitter also comprises:
Transmission buffer is used to store described block of information, and by described wave point, via common logical, described block of information is sent to the MAC layer.
8, external encode entity as claimed in claim 5, wherein, the block of information of carrying from the user profile in first logic flow of first information source has identical sequence number with the block of information of carrying from the same subscriber information in second logic flow of second information source, and
Wherein, described scheduling unit monitors the sequence number of the block of information of the sequence number of block of information of described first logic flow and described second logic flow, and adjust the relative time calibration of the block of information of described first logic flow according to the block of information of described second logic flow, calibrate thereby will described first and second flow to line time.
9, external encode entity as claimed in claim 2, wherein, the capable size of described multirow user profile changes based on application.
10, external encode entity as claimed in claim 2, wherein, described scheduling unit is determined the fixing capable size of described outside code block, thereby each row is sent in a Transmission Time Interval (TTI) with peak data rate, and, before receiving whole user profile, start the transmission of described block of information and length indicator.
11, external encode entity as claimed in claim 10, wherein, described cut apart be connected in series the unit cut apart described multirow user profile with the outside code block that is suitable for fixed dimension capable in, with described multirow user profile insert described outside code block capable in to generate block of information, it is capable to fill all unappropriated outside code blocks with the information of filling up, and, in each outside code block is capable, increase at least one length indicator, with expression delegation's user profile or fill up the end of message in outside code block that this block of information takies is capable.
12, external encode entity as claimed in claim 11, wherein, encoder packet comprises described block of information, fills up information and length indicator, and wherein, described external encoder extracts the part of each encoder packet to obtain information extraction, described information extraction is encoded with generation multirow redundant information, and, described multirow redundant information is added to the outside code block that has described fixing capable size in the described encoder packet with generation.
13, external encode entity as claimed in claim 2, wherein, the capable size of described outside code block is variable, and wherein, in case receive whole capable user profile, described scheduling unit is determined the variable row size that described outside code block is capable just based on the amount of user information of receiving, and wherein, the size of the outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block.
14, external encode entity as claimed in claim 13, wherein, described cut apart be connected in series the unit cut apart multirow user profile be suitable for variable-sized outside code block capable in, thereby it is capable to make described multirow user profile take described a plurality of outside code block fully, with described multirow user profile insert described outside code block capable in to generate block of information, and, in each outside code block is capable, increase at least one length indicator, with expression delegation user profile end at outside code block that this block of information takies capable in.
15, external encode entity as claimed in claim 13, wherein, described encoder packet comprises described block of information and length indicator, and wherein, described external encoder extracts the part of each encoder packet to obtain information extraction, described information extraction is encoded with generation multirow redundant information, and, described multirow redundant information is increased to the outside code block that has described variable row size in the described encoder packet with generation.
16, external encode entity as claimed in claim 2, wherein, in case receive whole capable user profile or determine and to generate described outside code block, described scheduling unit is just based on the amount of user information of receiving, from the capable size of a plurality of predetermined external code blocks, determine the variable capable size of outside code block, this variable capable size of outside code block makes the part of the outside code block that non-user profile takies realize minimizing, thereby reduces user information rate.
17, external encode entity as claimed in claim 2, wherein, in case receive whole capable user profile, described scheduling unit is just based on the amount of user information of receiving, determine a capable size of variable external code block that makes described multirow user profile take described encoder packet fully, wherein, the size of the outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block.
18, external encode entity as claimed in claim 1, wherein, described receiver comprises:
Reception buffer is used for the accumulating information piece, till satisfying condition;
Wherein, sequence number identifies outside code block and the position of described block of information in described outside code block that each block of information belongs to;
The rearrangement unit utilizes the sequence number in each block of information, and all block of informations of out of order reception are resequenced; And
Repetition detection unit in case described block of information is resequenced, is just used the described sequence number in each block of information to detect the duplicate message piece, and is deleted all duplicate message pieces; And
When satisfying described condition for given outside code block, described repetition detection unit utilization deletion information is replaced all block of informations of not passing through cyclic redundancy check, and generates a request, with the beginning external decoder.
19, external encode entity as claimed in claim 18, wherein, described condition is: receive whole outside code block.
20, external encode entity as claimed in claim 18, wherein, described condition is: no longer include the re-transmission of described outside code block.
21, external encode entity as claimed in claim 18 also comprises:
Sequence number is removed the unit, removes described sequence number from each block of information of described outside code block; And
External encoder receives described outside code block, and, if necessary, just use described redundant block that all the deletion information in the described outside code block are decoded, to regenerate the block of information of losing.
22, external encode entity as claimed in claim 21 also comprises:
Recomposition unit is used described block of information and described length indicator, rebuilds multirow user profile; And
Transmission buffer sends described multirow user profile by wireless carrier, so that described multirow user profile is sent to higher level.
23, external encode entity as claimed in claim 21, wherein, what receive when described reception buffer is stored in the block of information of former reception decoded enters block of information, thereby realizes the continuous reception of block of information during decoding.
24, external encode entity as claimed in claim 18, wherein, described rearrangement unit is the time offset between described decoding delay first and second logic flows, and waits for two outside code blocks that will receive before beginning to decode.
25, external encode entity as claimed in claim 18, wherein, described reception buffer receives the outside code block that comprises multirow block of information, wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, wherein, the size of every capable block of information is fixed, and takies a Transmission Time Interval (TTI).
26, external encode entity as claimed in claim 21, wherein, described outer decoder uses the multirow redundant information, described outside code block is decoded, comprise the complete encoder packet of block of information and length indicator with generation, wherein, described block of information is free from mistakes.
27, external encode entity as claimed in claim 22, wherein, described recomposition unit is used at least one length indicator in each block of information, determining where delegation's user profile ends in outside code block that described block of information takies is capable, and described block of information is divided into multirow user profile.
28, external encode entity as claimed in claim 18, wherein, described reception buffer receives the outside code block that comprises multirow block of information, wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, and wherein, the size of every capable block of information is variable, and described multirow user profile takies described multirow block of information fully.
29, a kind of initiator comprises:
First buffer is used to store multirow user profile;
Scheduling unit is used for:
Determine to need to send the outside code block maximum duration before,
Based on stored user information amount in described first buffer, determine the optimum size of block of information, this optimum size makes described multirow user profile to take described block of information in the mode of the not filling part that reduces described block of information, and
Generate a request, to start coding to described multirow user profile;
Cut apart and be connected in series the unit, in response to request from described scheduling unit, described multirow user profile is cut apart being fit to have the block of information of described optimum size, and, in each block of information, generate length indicator, with the end of expression with respect to delegation's user profile of this block of information; And
External encoder received block of information before Radio Link control (RLC) layer, and used described block of information to generate the redundant block of desiring to add in the described block of information, to produce outside code block.
30, initiator as claimed in claim 29, wherein, when running up to a certain amount of user plane information, described scheduling unit begins coding.
31, initiator as claimed in claim 29, wherein, when the block transmission delay time expired, described scheduling unit began coding.
32, initiator as claimed in claim 29, wherein, described transmitter also comprises:
The sequence number maker is used for adding header outside each block of information, and wherein, described header comprises the sequence number that is used to identify the order that each block of information is considered.
33, initiator as claimed in claim 32, wherein, described sequence number comprises the part that is used to identify the part of described outside code block and is used to identify the position of described each block of information in described outside code block.
34, initiator as claimed in claim 32, wherein, described transmitter also comprises:
Transmission buffer is used to store described block of information, and by described wave point, via common logical, sends described block of information.
35, initiator as claimed in claim 32, wherein, carrying has identical sequence number from the block of information of the user profile in first logic flow of first information source with the block of information of carrying from the same subscriber information in second logic flow of second information source, and,
Wherein, described scheduling unit monitors the sequence number of the block of information of the sequence number of block of information of described first logic flow and described second logic flow, and adjust the relative time calibration of the block of information of described first logic flow according to the block of information of described second logic stream, thereby flow to the line time calibration to described first and second.
36, initiator as claimed in claim 29, wherein, the capable size of described multirow user profile changes based on application.
37, initiator as claimed in claim 29, wherein, described scheduling unit is determined the fixing capable size of described outside code block, thereby in a Transmission Time Interval (TTI), send each row with peak data rate, and, before receiving whole user profile, start the transmission of described block of information and length indicator.
38, initiator as claimed in claim 37, wherein, described cut apart be connected in series the unit cut apart described multirow user profile with the outside code block that is suitable for fixed dimension capable in, with described multirow user profile insert described outside code block capable in to generate block of information, it is capable to fill all unappropriated outside code blocks with the information of filling up, and, in each outside code block is capable, increase at least one length indicator, with expression delegation's user profile or fill up the end of message in outside code block that this block of information takies is capable.
39, initiator as claimed in claim 38, wherein, encoder packet comprises described block of information, fills up information and length indicator, and wherein, described external encoder extracts the part of each encoder packet to obtain information extraction, described information extraction is encoded with generation redundant information row, and, described redundant information row is added to the outside code block that has described fixing capable size in the described encoder packet with generation.
40, initiator as claimed in claim 29, wherein, the capable size of described outside code block is variable, and wherein, in case receive all row user profile, described scheduling unit is determined the variable row size of the row of described outside code block just based on the amount of user information of receiving, and wherein, the size of the outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block.
41, initiator as claimed in claim 40, wherein, described cut apart be connected in series the unit cut apart multirow user profile be suitable for variable-sized outside code block capable in, thereby it is capable to make described multirow user profile take described a plurality of outside code block fully, with described multirow user profile insert described outside code block capable in to generate block of information, and, in each outside code block is capable, increase at least one length indicator, with expression delegation user profile end at outside code block that this block of information takies capable in.
42, initiator as claimed in claim 40, wherein, described encoder packet comprises described block of information and length indicator, and wherein, described external encoder extracts the part of each encoder packet to obtain information extraction, described information extraction is encoded with generation multirow redundant information, and, described multirow redundant information is increased to the outside code block that has described variable row size in the described encoder packet with generation.
43, initiator as claimed in claim 29, wherein, in case receive all row user profile or determine to generate described outside code block, described scheduling unit is just based on the amount of user information of receiving, from the capable size of a plurality of predetermined external code blocks, determine the variable capable size of outside code block, so that the part of the described outside code block that non-user profile takies realizes minimizing, thereby reduce user information rate.
44, initiator as claimed in claim 29, wherein, in case receive all row user profile, described scheduling unit is just based on the amount of user information of receiving, determine a capable size of variable external code block that makes described multirow user profile take described encoder packet fully, wherein, the size of the outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block.
45, a kind of point of destination comprises:
Reception buffer is used for the accumulating information piece, till satisfying condition;
Wherein, sequence number identifies outside code block and the position of each block of information in described outside code block that each block of information belongs to;
The rearrangement unit utilizes the sequence number in each block of information, and all block of informations of out of order reception are resequenced; And
Repetition detection unit in case described block of information is resequenced, is just used the sequence number in each block of information to detect the duplicate message piece, and is deleted all duplicate message pieces; And
When satisfying described condition for given outside code block, described repetition detection unit utilization deletion information is replaced all block of informations of not passing through cyclic redundancy check, and generates a request, with the beginning external decoder.
46, point of destination as claimed in claim 45, wherein, described condition is: receive whole outside code block.
47, point of destination as claimed in claim 45, wherein, described condition is: no longer include the re-transmission of described outside code block.
48, point of destination as claimed in claim 45 also comprises:
Sequence number is removed the unit, removes described sequence number from each block of information of described outside code block; And
Outer decoder receives described outside code block, if necessary, uses described redundant block that all the deletion information in the described outside code block are decoded, to regenerate the block of information of losing.
49, point of destination as claimed in claim 48 wherein, also comprises:
Recomposition unit is used described block of information and described length indicator, rebuilds multirow user profile; And
Transmission buffer sends described multirow user profile by wireless carrier, so that described multi-user information is sent to higher level.
50, point of destination as claimed in claim 48, wherein, the input block that receives when described reception buffer is stored in the block of information of former reception decoded, thus during decoding, realize the continuous reception of block of information.
51, point of destination as claimed in claim 45, wherein, described rearrangement unit is the time offset between described decoding delay first and second logic flows, and waits for two outside code blocks that will receive before beginning to decode.
52, point of destination as claimed in claim 45, wherein, described reception buffer receives the outside code block that comprises multirow block of information, wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, wherein, the size of every capable block of information is fixed, and takies a Transmission Time Interval (TTI).
53, point of destination as claimed in claim 48, wherein, described outer decoder uses the multirow redundant information, and described outside code block is decoded, and comprises the complete encoder packet of block of information and length indicator with generation, and wherein, described block of information is free from mistakes.
54, point of destination as claimed in claim 49, wherein, described recomposition unit is used at least one length indicator in each block of information, determines where delegation's user profile ends in outside code block that described block of information takies is capable, and described block of information is divided into multirow user profile.
55, point of destination as claimed in claim 45, wherein, described reception buffer receives the outside code block that comprises multirow block of information, wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, and wherein, the size of every capable block of information is variable, and described multirow user profile takies described multirow block of information fully.
56, a kind of method that is used to create the outside code block of fixing capable size with multirow comprises:
Receive user profile by wireless carrier, wherein, the capable size of described user profile changes based on application;
Based on channel conditions, determine a fixing capable size of outside code block, this row size makes each row can send with peak data rate in a Transmission Time Interval (TTI);
Multirow user profile cut apart and be connected in series, with the outside code block that is suitable for fixed dimension capable in;
With described multirow user profile insert outside code block capable in, to generate block of information, wherein, it is capable to utilize the information of filling up to fill all unappropriated outside code blocks;
Increase at least one length indicator in each outside code block is capable, with expression delegation's user profile or fill up the end of message in outside code block that this block of information takies is capable, and wherein, encoder packet comprises described block of information, fills up information and length indicator,
Before receiving all user profile, start the transmission of described block of information and length indicator;
Extract the part of each encoder packet, to obtain information extraction;
Described information extraction is encoded, to generate the multirow redundant information; And
Described multirow redundant information is added in the described encoder packet, have the outside code block of described fixing capable size with generation.
57, a kind of method that is used to create the outside code block of variable row size with multirow comprises:
Receive multirow user profile by wireless carrier, wherein, the capable size of described multirow user profile changes based on application;
In case receive all row user profile, just based on the amount of user information of receiving, determine a variable capable size of outside code block, wherein, the size of the outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block;
Multirow user profile cut apart and be connected in series, be suitable for variable-sized outside code block capable in;
With described multirow user profile insert described outside code block capable in, to generate a plurality of block of informations;
In each outside code block is capable, increase at least one length indicator, with expression delegation user profile end at outside code block that this block of information takies capable in, wherein, it is capable that described multirow user profile takies described a plurality of outside code block fully, and wherein, encoder packet comprises described block of information and length indicator;
Extract the part of each encoder packet, to obtain information extraction;
Described information extraction is encoded, to generate the multirow redundant information;
Described multirow redundant information is increased in the described encoder packet, has the outside code block of described variable row size with generation; And
Send described encoder packet.
58, method as claimed in claim 57, wherein, determine that based on the amount of user information of receiving the variable capable size of outside code block comprises:
In case receive all row user profile or determine to generate described outside code block, just based on the amount of user information of receiving, from the capable size of a plurality of predetermined external code blocks, determine the variable capable size of outside code block, this variable capable size of outside code block makes the part of the described outside code block that non-user profile takies realize minimizing, thereby reduces user information rate.
59, method as claimed in claim 57, wherein, determine that based on the amount of user information of receiving the variable capable size of outside code block comprises:
In case receive all row user profile, just based on the amount of user information of receiving, determine a capable size of variable external code block that makes described multirow user profile take described encoder packet fully, wherein, the size of the described outside code block that sends in a Transmission Time Interval changes based on the capable size of described outside code block.
60, a kind of method that is used to receive user profile comprises:
Reception comprises the outside code block of multirow block of information, and wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, and wherein, the size of every capable block of information is fixed, and takies a Transmission Time Interval (TTI);
Use the multirow redundant information, described outside code block is decoded, comprise the complete encoder packet of block of information and length indicator with generation, wherein, described block of information is free from mistakes; And
Use at least one length indicator in each block of information, determine where delegation's user profile ends in outside code block that described block of information takies is capable, and described block of information is divided into multirow user profile.
61, a kind of method that is used to receive user profile comprises:
Reception comprises the outside code block of multirow block of information, and wherein, described multirow block of information respectively comprises at least a portion of delegation's user profile, and wherein, the size of every capable block of information is variable, and described multirow user profile takies described multirow block of information fully;
Use the multirow redundant information, described outside code block is decoded, comprise the complete encoder packet of block of information and length indicator with generation, wherein, described block of information is free from mistakes; And
Use at least one length indicator in each block of information, determine where delegation's user profile ends in outside code block that described block of information takies is capable; And
Described block of information is divided into multirow user profile.
62, a kind of point is to multiple spot (PTM) transmission system, and it can be realized variable rate transmission, out of order reception and the point of variable bit rate information source is cut apart and is connected in series to multiple spot (PTM) transmission, comprise:
Network, this network comprises:
The receiver buffer, storage forward error correction (FEC) service data unit (SDU);
Cut apart and be connected in series entity, the multirow of encoder matrix is cut apart and be concatenated into to FEC SDU, this encoder matrix comprises more than first information row, and wherein, every row of described encoder matrix takies an independently Transmission Time Interval;
Scheduling entity in case receive the data of scheduled volume, just generates a starting command that starts coding, thereby reduce the information of filling up of adding during encoding in every row of encoder packet;
Asynchronous external encoder in response to described starting command, generates encoder packet, and wherein, each encoder packet comprises more than first information row, more than second parity check rows and is positioned at the information of filling up of described encoder packet end;
Sequencer after carrying out external encode, comprises the external header of sequence number to every row interpolation of described encoder packet; And
Transmission buffer receives described encoder packet, and they are formatted into the mixing code block, and sends described mixing code block by wave point.
63, system as claimed in claim 62 also comprises:
Terminal receives described mixing code block, comprising:
Receiving element accumulates described multirow encoder packet, and with the time offset between decoding delay first and second logic flows; Wherein, described receiving element is in response to described sequence number, determine that each forward error correction (FEC) PDU belongs to which encoder packet and the position of each forward error correction (FEC) PDU in described encoder packet, thereby, described receiving element uses described sequence number, carries out the duplicate detection and the rearrangement of described reception piece;
Remove the unit, remove described sequence number;
Outer decoder is decoded to described information row; And
Transmission buffer, the described information row of recombinating.
64, as the described system of claim 63, wherein, described sequence number generator adds an inner header, this inner header is provided for rebuilding the information of described SDU, wherein, described header is enrolled length indicator (LI), this length indicator is included among its related RLC-PDU, wherein, a flag bit in the sequence number header of described RLC-PDU represents whether there is a LI.
65, as the described system of claim 64, wherein, described inner header is added on the place that begins of described EP.
66, as the described system of claim 65, wherein, described inner header is added on the place that begins of each encoder packet row.
67, system as claimed in claim 62, wherein, each encoder packet row comprises forward error correction (FEC) protocol Data Unit (PDU), parity block and/or fills up information.
68, system as claimed in claim 62, wherein, the capable size of described encoder packet is variable.
69, system as claimed in claim 62, wherein, the capable size of described encoder packet has fixing size.
70, system as claimed in claim 62, wherein, described sequence number identifies the PDU in described specific encoder grouping (EP) and this EP.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49745603P | 2003-08-21 | 2003-08-21 | |
| US49745703P | 2003-08-21 | 2003-08-21 | |
| US60/497,456 | 2003-08-21 | ||
| US60/497,457 | 2003-08-21 | ||
| US10/922,424 | 2004-08-19 | ||
| US10/922,424 US7318187B2 (en) | 2003-08-21 | 2004-08-19 | Outer coding methods for broadcast/multicast content and related apparatus |
| PCT/US2004/027223 WO2005022814A1 (en) | 2003-08-21 | 2004-08-20 | Outer coding methods for broadcast/multicast content and related apparatus |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102248605A Division CN101867879B (en) | 2003-08-21 | 2004-08-20 | Outer coding methods for broadcast/multicast content and related apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1871804A true CN1871804A (en) | 2006-11-29 |
| CN1871804B CN1871804B (en) | 2010-09-01 |
Family
ID=37390886
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800286963A Active CN1868157B (en) | 2003-08-21 | 2004-08-20 | Methods for forward error correction coding above a radio link control layer and related apparatus |
| CN2004800286925A Active CN1864359B (en) | 2003-08-21 | 2004-08-20 | Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus |
| CN2004800307866A Active CN1871804B (en) | 2003-08-21 | 2004-08-20 | Outer coding methods for broadcast/multicast content and related apparatus |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800286963A Active CN1868157B (en) | 2003-08-21 | 2004-08-20 | Methods for forward error correction coding above a radio link control layer and related apparatus |
| CN2004800286925A Active CN1864359B (en) | 2003-08-21 | 2004-08-20 | Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN1868157B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101689928A (en) * | 2007-05-02 | 2010-03-31 | 韩国电子通信研究院 | Method and apparatus for transmitting signal |
| CN101895372A (en) * | 2010-06-29 | 2010-11-24 | 中国科学院计算技术研究所 | Data transmission method in radio link control layer acknowledged mode |
| CN102438275A (en) * | 2007-08-01 | 2012-05-02 | 华为技术有限公司 | Wireless bearing method and device for circuit domain service data |
| US8451770B2 (en) | 2002-05-06 | 2013-05-28 | Qualcomm Incorporated | Multi-media broadcast and multicast service (MBMS) in a wireless communication system |
| CN103607263A (en) * | 2008-05-30 | 2014-02-26 | 交互数字专利控股公司 | WTRU, method for receiving switching information and implemented in WTRU, and integrated circuit |
| US8694869B2 (en) | 2003-08-21 | 2014-04-08 | QUALCIMM Incorporated | Methods for forward error correction coding above a radio link control layer and related apparatus |
| US8804761B2 (en) | 2003-08-21 | 2014-08-12 | Qualcomm Incorporated | Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus |
| CN102177735B (en) * | 2008-10-07 | 2014-12-17 | 日本电气株式会社 | Network controller, communication system, and bearer type identifying method |
| CN105898797A (en) * | 2015-02-16 | 2016-08-24 | 联发科技股份有限公司 | Mobile communication device and data processing method |
| CN105900347A (en) * | 2015-10-27 | 2016-08-24 | 深圳还是威健康科技有限公司 | Bluetooth-based data transmission method and device |
| US9565683B2 (en) | 2007-08-01 | 2017-02-07 | Huawei Technologies Co., Ltd. | Method, apparatus and system for bearing circuit switched domain service data over radio bearer |
| CN107710627A (en) * | 2015-07-02 | 2018-02-16 | 索尼公司 | Communication equipment, communication system, communication means and program |
| CN110049493A (en) * | 2008-12-24 | 2019-07-23 | 高通股份有限公司 | Optimized header for being efficiently treated through to data grouping |
| CN110431774A (en) * | 2017-03-15 | 2019-11-08 | 高通股份有限公司 | Code block group for wireless communication defines configuration |
Families Citing this family (50)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6307487B1 (en) | 1998-09-23 | 2001-10-23 | Digital Fountain, Inc. | Information additive code generator and decoder for communication systems |
| US7068729B2 (en) | 2001-12-21 | 2006-06-27 | Digital Fountain, Inc. | Multi-stage code generator and decoder for communication systems |
| US9240810B2 (en) | 2002-06-11 | 2016-01-19 | Digital Fountain, Inc. | Systems and processes for decoding chain reaction codes through inactivation |
| JP4546246B2 (en) | 2002-10-05 | 2010-09-15 | デジタル ファウンテン， インコーポレイテッド | Systematic encoding and decryption of chained encryption reactions |
| CN1954501B (en) | 2003-10-06 | 2010-06-16 | 数字方敦股份有限公司 | Method for receving data transmitted from a source by communication channel |
| US9270414B2 (en) | 2006-02-21 | 2016-02-23 | Digital Fountain, Inc. | Multiple-field based code generator and decoder for communications systems |
| US7971129B2 (en) | 2006-05-10 | 2011-06-28 | Digital Fountain, Inc. | Code generator and decoder for communications systems operating using hybrid codes to allow for multiple efficient users of the communications systems |
| US9419749B2 (en) | 2009-08-19 | 2016-08-16 | Qualcomm Incorporated | Methods and apparatus employing FEC codes with permanent inactivation of symbols for encoding and decoding processes |
| US9386064B2 (en) | 2006-06-09 | 2016-07-05 | Qualcomm Incorporated | Enhanced block-request streaming using URL templates and construction rules |
| US9178535B2 (en) | 2006-06-09 | 2015-11-03 | Digital Fountain, Inc. | Dynamic stream interleaving and sub-stream based delivery |
| US9380096B2 (en) | 2006-06-09 | 2016-06-28 | Qualcomm Incorporated | Enhanced block-request streaming system for handling low-latency streaming |
| US9432433B2 (en) | 2006-06-09 | 2016-08-30 | Qualcomm Incorporated | Enhanced block-request streaming system using signaling or block creation |
| US9209934B2 (en) | 2006-06-09 | 2015-12-08 | Qualcomm Incorporated | Enhanced block-request streaming using cooperative parallel HTTP and forward error correction |
| US8358669B2 (en) | 2007-05-01 | 2013-01-22 | Qualcomm Incorporated | Ciphering sequence number for an adjacent layer protocol in data packet communications |
| US8331399B2 (en) | 2007-05-07 | 2012-12-11 | Qualcomm Incorporated | Re-using sequence number by multiple protocols for wireless communication |
| KR101341515B1 (en) | 2007-06-18 | 2013-12-16 | 엘지전자 주식회사 | Method of updating repeatedly-transmitted information in wireless communicaiton system |
| KR101470637B1 (en) | 2007-06-18 | 2014-12-08 | 엘지전자 주식회사 | Method for enhancing radio resource and informing status report in mobile telecommunications system and receiver of mobile telecommunications |
| KR101486352B1 (en) | 2007-06-18 | 2015-01-26 | 엘지전자 주식회사 | Method of controlling uplink synchronization state at a user equipment in a mobile communication system |
| WO2008156314A2 (en) | 2007-06-20 | 2008-12-24 | Lg Electronics Inc. | Effective system information reception method |
| WO2009022826A1 (en) | 2007-08-10 | 2009-02-19 | Lg Electronics Inc. | Method for controlling harq operation in dynamic radio resource allocation |
| KR101514841B1 (en) | 2007-08-10 | 2015-04-23 | 엘지전자 주식회사 | Method for re-attempting a random access effectively |
| KR101490253B1 (en) | 2007-08-10 | 2015-02-05 | 엘지전자 주식회사 | Method of transmitting and receiving control information in a wireless communication system |
| WO2009022877A2 (en) | 2007-08-14 | 2009-02-19 | Lg Electronics Inc. | A method of transmitting and processing data block of specific protocol layer in wireless communication system |
| US9237101B2 (en) | 2007-09-12 | 2016-01-12 | Digital Fountain, Inc. | Generating and communicating source identification information to enable reliable communications |
| KR100937432B1 (en) | 2007-09-13 | 2010-01-18 | 엘지전자 주식회사 | Method of allocating radio resources in a wireless communication system |
| KR101461970B1 (en) | 2007-09-13 | 2014-11-14 | 엘지전자 주식회사 | Method of performing polling procedure in a wireless communication system |
| KR101513033B1 (en) | 2007-09-18 | 2015-04-17 | 엘지전자 주식회사 | A method for qos guarantees in a multilayer structure |
| KR101396062B1 (en) | 2007-09-18 | 2014-05-26 | 엘지전자 주식회사 | Effective data block transmission method using a header indicator |
| KR101591824B1 (en) | 2007-09-18 | 2016-02-04 | 엘지전자 주식회사 | Method of performing polling procedure in a wireless communication system |
| KR101435844B1 (en) | 2007-09-18 | 2014-08-29 | 엘지전자 주식회사 | Method of transmitting a data block in a wireless communication system |
| US8687565B2 (en) | 2007-09-20 | 2014-04-01 | Lg Electronics Inc. | Method of effectively transmitting radio resource allocation request in mobile communication system |
| KR20090041323A (en) | 2007-10-23 | 2009-04-28 | 엘지전자 주식회사 | Method of effectively transmitting identification information of terminal during the generation of data block |
| KR101487557B1 (en) | 2007-10-23 | 2015-01-29 | 엘지전자 주식회사 | Method for transmitting data of common control channel |
| US8416678B2 (en) | 2007-10-29 | 2013-04-09 | Lg Electronics Inc. | Method for repairing an error depending on a radio bearer type |
| KR101163275B1 (en) | 2008-03-17 | 2012-07-05 | 엘지전자 주식회사 | Method for transmitting pdcp status report |
| WO2009116788A1 (en) | 2008-03-17 | 2009-09-24 | Lg Electronics Inc. | Method of transmitting rlc data |
| US9281847B2 (en) * | 2009-02-27 | 2016-03-08 | Qualcomm Incorporated | Mobile reception of digital video broadcasting—terrestrial services |
| US9288010B2 (en) | 2009-08-19 | 2016-03-15 | Qualcomm Incorporated | Universal file delivery methods for providing unequal error protection and bundled file delivery services |
| US9917874B2 (en) | 2009-09-22 | 2018-03-13 | Qualcomm Incorporated | Enhanced block-request streaming using block partitioning or request controls for improved client-side handling |
| US8918533B2 (en) | 2010-07-13 | 2014-12-23 | Qualcomm Incorporated | Video switching for streaming video data |
| US9185439B2 (en) | 2010-07-15 | 2015-11-10 | Qualcomm Incorporated | Signaling data for multiplexing video components |
| US8958375B2 (en) | 2011-02-11 | 2015-02-17 | Qualcomm Incorporated | Framing for an improved radio link protocol including FEC |
| US9253233B2 (en) | 2011-08-31 | 2016-02-02 | Qualcomm Incorporated | Switch signaling methods providing improved switching between representations for adaptive HTTP streaming |
| US9843844B2 (en) | 2011-10-05 | 2017-12-12 | Qualcomm Incorporated | Network streaming of media data |
| US9294226B2 (en) | 2012-03-26 | 2016-03-22 | Qualcomm Incorporated | Universal object delivery and template-based file delivery |
| KR101358886B1 (en) * | 2012-04-12 | 2014-02-06 | 고려대학교 산학협력단 | Transmission device and reception device, conrol method of transmission device |
| CN107333298B (en) * | 2016-04-29 | 2020-03-24 | 电信科学技术研究院 | Data transmission method and related equipment |
| CN107566083B (en) * | 2017-07-19 | 2020-05-15 | 西南交通大学 | Compensation retransmission method suitable for network coding transmission control protocol |
| EP3711276A1 (en) * | 2017-11-16 | 2020-09-23 | Nokia Solutions and Networks Oy | Multicast/broadcast service to radio access networks with core network |
| JP7235935B2 (en) * | 2020-05-28 | 2023-03-08 | 京セラ株式会社 | Communication control method, user equipment, processor and base station |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6363058B1 (en) * | 1997-09-24 | 2002-03-26 | Telefonaktiebolaget L M Ericsson (Publ) | Multi-service handling by a single mobile station |
| EP1041850A1 (en) * | 1999-04-01 | 2000-10-04 | Nortel Matra Cellular | Method and apparatus for changing radio link configurations in a mobile telecommunications system with soft handover |
-
2004
- 2004-08-20 CN CN2004800286963A patent/CN1868157B/en active Active
- 2004-08-20 CN CN2004800286925A patent/CN1864359B/en active Active
- 2004-08-20 CN CN2004800307866A patent/CN1871804B/en active Active
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8451770B2 (en) | 2002-05-06 | 2013-05-28 | Qualcomm Incorporated | Multi-media broadcast and multicast service (MBMS) in a wireless communication system |
| US8804761B2 (en) | 2003-08-21 | 2014-08-12 | Qualcomm Incorporated | Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus |
| US8694869B2 (en) | 2003-08-21 | 2014-04-08 | QUALCIMM Incorporated | Methods for forward error correction coding above a radio link control layer and related apparatus |
| US9894595B2 (en) | 2007-05-02 | 2018-02-13 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting signal |
| US9143257B2 (en) | 2007-05-02 | 2015-09-22 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting signal |
| CN101689928A (en) * | 2007-05-02 | 2010-03-31 | 韩国电子通信研究院 | Method and apparatus for transmitting signal |
| US9143256B2 (en) | 2007-05-02 | 2015-09-22 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting signal |
| US9565683B2 (en) | 2007-08-01 | 2017-02-07 | Huawei Technologies Co., Ltd. | Method, apparatus and system for bearing circuit switched domain service data over radio bearer |
| CN102438275B (en) * | 2007-08-01 | 2015-04-08 | 华为技术有限公司 | Wireless bearing method and device for circuit domain service data |
| CN102438275A (en) * | 2007-08-01 | 2012-05-02 | 华为技术有限公司 | Wireless bearing method and device for circuit domain service data |
| US9572141B2 (en) | 2007-08-01 | 2017-02-14 | Huawei Technologies Co., Ltd. | Method, apparatus and system for bearing circuit switched domain service data over radio bearer |
| US9848429B2 (en) | 2007-08-01 | 2017-12-19 | Huawei Technologies Co., Ltd. | Method, apparatus and system for bearing circuit switched domain service data over radio bearer |
| CN103607263B (en) * | 2008-05-30 | 2017-08-01 | 交互数字专利控股公司 | WTRU, the method for the reception handover request implemented in WTRU and integrated circuit |
| CN103607263A (en) * | 2008-05-30 | 2014-02-26 | 交互数字专利控股公司 | WTRU, method for receiving switching information and implemented in WTRU, and integrated circuit |
| CN102177735B (en) * | 2008-10-07 | 2014-12-17 | 日本电气株式会社 | Network controller, communication system, and bearer type identifying method |
| CN110049493A (en) * | 2008-12-24 | 2019-07-23 | 高通股份有限公司 | Optimized header for being efficiently treated through to data grouping |
| CN110049493B (en) * | 2008-12-24 | 2023-09-29 | 高通股份有限公司 | Optimized header for efficient processing of data packets |
| CN101895372A (en) * | 2010-06-29 | 2010-11-24 | 中国科学院计算技术研究所 | Data transmission method in radio link control layer acknowledged mode |
| CN101895372B (en) * | 2010-06-29 | 2013-04-03 | 中国科学院计算技术研究所 | Data transmission method in radio link control layer acknowledged mode |
| CN105898797A (en) * | 2015-02-16 | 2016-08-24 | 联发科技股份有限公司 | Mobile communication device and data processing method |
| CN107710627A (en) * | 2015-07-02 | 2018-02-16 | 索尼公司 | Communication equipment, communication system, communication means and program |
| CN107710627B (en) * | 2015-07-02 | 2022-01-11 | 索尼公司 | Communication device, communication system, communication method, and program |
| CN105900347B (en) * | 2015-10-27 | 2018-06-12 | 深圳还是威健康科技有限公司 | A kind of data transmission method and device based on bluetooth |
| CN105900347A (en) * | 2015-10-27 | 2016-08-24 | 深圳还是威健康科技有限公司 | Bluetooth-based data transmission method and device |
| CN110431774A (en) * | 2017-03-15 | 2019-11-08 | 高通股份有限公司 | Code block group for wireless communication defines configuration |
| CN110431774B (en) * | 2017-03-15 | 2021-11-23 | 高通股份有限公司 | Method, entity and device for code block group definition configuration for wireless communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1871804B (en) | 2010-09-01 |
| CN1868157B (en) | 2011-07-27 |
| CN1864359B (en) | 2012-04-18 |
| CN1864359A (en) | 2006-11-15 |
| CN1868157A (en) | 2006-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1871804A (en) | Outer coding methods for broadcast/multicast content and related apparatus | |
| CN101867879B (en) | Outer coding methods for broadcast/multicast content and related apparatus | |
| JP5980838B2 (en) | Method and related apparatus for seamless distribution of broadcast and multicast content across cell boundaries and / or with different transmission schemes | |
| JP4833844B2 (en) | Method and associated apparatus for forward error correction coding on a radio link control layer | |
| TWI392266B (en) | Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus | |
| CN1741435A (en) | Method for recovering drop-out data unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1094114 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1094114 Country of ref document: HK |