CN1092436C - Packet data transmission in code-division multipel access communication systems - Google Patents
Packet data transmission in code-division multipel access communication systems Download PDFInfo
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- CN1092436C CN1092436C CN 95197895 CN95197895A CN1092436C CN 1092436 C CN1092436 C CN 1092436C CN 95197895 CN95197895 CN 95197895 CN 95197895 A CN95197895 A CN 95197895A CN 1092436 C CN1092436 C CN 1092436C
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Abstract
The system is divided into a physical layer (20), a data link layer and a physical layer (24), wherein the data link layer is further divided into the three layers of a link control layer (DCL) (23) and two medium-speed access control parts (21) and (22), the link control layer (DCL) (23) relates to the establishment, the release and the maintenance of a link. A lower layer MAC part (21) can exist under various conditions, and an upper layer MAC part is special. The upper layer MAC part exists in RNC, the lower layer MAC part exists in each base station, and thus, the two MAC parts (21) and (22) are separated at the network end in physics. A connectionless packet service (CLPS) entity (25.1) provides packet wireless service for mobile users. A CLPS entity (25.2) of the network end provides all devices required for the register and the authentication of mobile users, allocates and manages VCI of the CLPS entity (25.2) and is connected into a packet data network. The CPLS entities (25.1) and (25.2) use a logic link administer (LLA) (26. x) to transmit an information selection route to an entity of the equivalent layer at the very beginning through an ordinary special control channel (DDCH) (27. x). After MS is connected with PRCH, information and user data which are all exchanged between the CPLS entities (25. x) MS can be grouped and oriented by respective PRCH (28. x). Under the conditions, a control group and a user data group reach a group wireless (PR) control entity (30. x) through a DLC (29. x). The group sections share an error control code by respective units (31. x), namely that group code protection is used to detect transmission errors at the receiving end, and then, the error control code is convoluted, inserted and interpolated by an entity (32. x) and is transmitted in PDCH 33. At the receiving end, the sections are reproduced from receiving samples, are reassembled into groups and are forwarded to the objective CPLS entity (25.2). When a decoder.
Description
The present invention relates to adopt the communication system of code division multiple access (CDMA).
Present Digital Cellular System, global system for mobile communications (GSM) or Digital Cellular System 1800 (DCS-1800) such as Europe, personal communication network (PCN) with U.S.'s plan, the main speech of supporting, message, be connected data service with the orientation of low rate, and be unsuitable for supporting packet-based data communication.
Yet many mobile computer application needs transmit single or multiple packets once in a while on the Radio Link of mobile communication system.Wherein have, for example, Email, TV shopping and TV bank, and vehicle scheduling or fleet management's application, storage availability forwarding short message breath business realizes.Except these terminal emulations, little time delay is allowed in other the long-range access of the Local Area Network based on server, or the interactive use of credit card verification needs, and has the wide characteristics of block length distribution.Beyond all doubt, following mobile communication system such as Universal Mobile Telecommunications System (UMTS), must support this data with effective Packet data service to use.In fact, European Telecommunications System association (ETSI) is devoted to a kind of like this business always, and promptly so-called GPRS (GPRS) is defined as a kind of expansion of existing gsm system.
Hereinafter, we will consider that UMTS is connected Packet data service with the nothing of PCN system.We especially pay close attention to the UMTS system, and this system supports following sign indicating number to divide in experiment (CODIT) problem in the advanced Communication Studies in Europe (RACE) plan to grow up.The CODIT system adopts spread spectrum transmission and code division multiple access (CDMA), and supports speech, and message is with the directed data service that is connected.The more details of relevant CODIT system please refer to " based on the design studies of the third generation mobile radio system of CDMA ", A.Baier et al., IEEE J.Selected AreasCommun., Vlo.12,1994, pp733-743.Because time division multiple access (TDMA) system that cdma system resists more with it can provide higher capacity and be easier to scheduling, so cdma system is especially attractive.
The object of the present invention is to provide a kind of method and apparatus, thereby make UMTS and PCN system can support connectionless packet wireless business based on CDMA.
Further purpose of the present invention is to provide a kind of communication system with additional function.
The invention provides a kind of method in order to the grouping of wirelessly transmitting data in a code division multiple address communication system, use a CDMA channel (PRCH) to realize with a kind of time-sharing format in this system from several transmitting station (MSy, MSz) to the transmission of packet between a receiving platform (BS), comprising following several steps: ● give the corresponding receiving platform (BS) of described communication system from request of a transmitting station (MSy) emission, with the destination address of indicating described packet will select route to be sent to, ● register described transmitting station (MSy) and distribute a special-purpose virtual connections identifier (VCIy) for it, ● described transmitting station (MSy) is transferred to the described CDMA channel (PRCH) that is used for transmission of data packets, ● answer the described downgoing line that is used for the CDMA channel (PRCH) of transmission of data packets, broadcast this channel with " free time " until corresponding receiving platform (BS), promptly in next frame, allow arbitrary to the described access that is used for the CDMA channel (PRCH) of transmission of data packets, ● during described next frame, promote the described transmitting power of stating transmitting station (MSy), until the power stage that reaches an appointment, ● via the described uplink that is used for the CDMA channel (PRCH) of transmission of data packets, described packet and described virtual connections identifier (VCly) are emitted to described receiving platform (BS), ● route is reselected in described packet be sent to described destination address, control to the described access that is used for the CDMA channel (PRCH) of transmission of data packets by a multiple access protocol based on carrier wave detection and collision detection (CSMA/CD).
Correspondingly, the invention provides a kind of code division multiple address communication system in order to the wirelessly transmitting data grouping, wherein use a CDMA channel (PRCH) to realize from several transmitting station (MSy with a kind of time-sharing format, MSz) to the transmission of packet between a receiving platform (BS), comprising: ● in order to a request is sent to the device of the corresponding receiving platform (BS) of described communication system from described transmitting station (MSy), with the destination address of indicating described packet will select route to be sent to, ● register described transmitting station (MSy) and distribute the device of a special-purpose virtual connections identifier (VCIy) for it, ● the device that described transmitting station (MSy) is transferred and is used for the CDMA channel (PRCH) of transmission of data packets to described, ● answer the described downgoing line that is used for the CDMA channel (PRCH) of transmission of data packets and broadcast this channel with " free time " until described receiving platform (BS), the device that promptly in next frame, allows the described CDMA channel (PRCH) that is used for transmission of data packets to insert at random, ● during described next frame, promote the transmitting power of described transmitting station (MSy), until the device that reaches a certain power level, ● on the uplink of the described CDMA channel (PRCH) that is used for transmission of data packets, described packet and described virtual connections identifier (VCIy) are transferred to the device of described receiving platform (BS), ● the device that route is sent to described destination address is reselected in described packet, ● detect multiple access protocol with collision detection (CSMA/CD) by a kind of based on carrier wave, control to the device of the access of the described CDMA channel (PRCH) that is used for transmission of data packets.In addition, the present invention also provides a kind of transceiver that is used for the wirelessly transmitting data grouping that uses in code division multiple address communication system, wherein use a CDMA channel (PRCH) to realize from several transmitting station (MSy with a kind of time-sharing format, MSz) to the transmission of packet between a receiving platform (BS), comprising: ● in order to a request is sent to the device of the corresponding receiving platform (BS) of described communication system from described transmitting station (MSy), with the destination address of indicating described packet will select route to be sent to, ● the device that described transmitting station (MSy) is transferred and is used for the CDMA channel (PRCH) of transmission of data packets to described, ● the downgoing line of answering described channel (PRCH) is broadcasted this channel with " free time " until described receiving platform (BS), promptly in next frame, allow a described device that inserts at random that is used for the CDMA channel (PRCH) of transmission of data packets, ● during described next frame, promote the transmitting power of described transmitting station (MSy), until the device that reaches a certain power level, ● on the uplink of the described CDMA channel (PRCH) that is used for transmission of data packets, described packet and described virtual connections identifier (VCIy) are transferred to the device of described receiving platform (BS).
To describe the present invention in detail with reference to following sketch hereinafter.
Fig. 1 indicates a kind of representative network by the CODIT definition.
The mobile terminal of Fig. 2 A indication CODIT protocol architecture of revision according to the present invention.
The network terminal of Fig. 2 B indication CODIT protocol architecture of revision according to the present invention.
Fig. 3 A indication is according to the flow chart of middling speed access control (MAC) agreement in the base station of the present invention.
Fig. 3 B indication is according to the flow chart of the MAC agreement among the MS of the present invention.
Fig. 4 is the sequential chart that detects multichannel collision detection (CSMA/CD) agreement according to time slot carrier wave of the present invention.
Fig. 5 is in order to set forth the block diagram of transmission plan of the present invention.
Below with reference to appended illustration details of the present invention is described.Provide an enforcement of the present invention then as example.
The present invention relates to a kind of method and implement its device, in order in CDMA communication (CDMA) system, to introduce a kind of connectionless packet wireless business.
Figure 1 shows that a kind of typical C DMA network system.It comprises four different functional entitys; Travelling carriage (MS1-MS4) 10.1-10.4, base station (BS1, BS2) 11.1 and 11.2, radio network controller (RNC) 12, and mobile control node (MCN) 13.RNC12 links to each other with the network of fixing 14 (for example Internet) via MCN13.This is the structure that we will adhere to when description is of the present invention.As shown in Figure 1, communicate by letter with a RNC by an interface in several base stations.Similarly, several RNC can link to each other with a MCN, and this MCN continues to link to each other with fixing network 14.A MS can link to each other with several base stations, promptly when it is in macro diversity mode or when carrying out a handover.
If MS only thinks once in a while via wireless communication, then there is no need to take and being connected of BS, because the user can not be willing to that meaning such connection spends.And have to be noted that in a sub-district, to have only the channel of limited quantity to use.If it is fixedly connected that all travelling carriages in the BS service area in this sub-district are all wanted to set up, will block whole system soon.Should only be that emission and the user who receives speech and long data frame keep several fixed channels in this sub-district.
According to the present invention, in the CDMA Channel that in a sub-district, provides by a BS, have at least one current several once in a while between the user time share, and all other channels are other user's reservation always.
For supporting potential a large amount of travelling carriages that only exchange grouping once in a while with the stiff end of network, and effectively utilize existing system resource, a kind of new logic channel that this paper is open and requirement increases to UMTS or PCN system based on CDMA, for example at " based on the design studies of three generations's mobile radio system of CDMA ", A.Baier et al., IEEE J.Selected Areas Commun., Vlo.12,1994, pp733-743, the CODIT system of middle description.This novel logic channel is a kind of by sole user's use or by shared packet radio channel (PRCH) of several users time.
According to the first embodiment of the present invention, control to the access of this PRCH by base station and radio network controller (RNC).Also can adopt an independent PRCH controller with a plurality of BS and/or RNC effect.
For reducing the complexity that in bottom UMTS or PCN system, increases as much as possible, keep supporting that the physical layer major part of PRCH does not change.Preferably use a long spreading code to be used for physical data channel (PDCH) and physical control channel (PCCH), and adopt coherent demodulation to be used for uplink (UL), i.e. link between MS and the BS, and downgoing line (DL) PDCH, i.e. link between BS and the MS.PCCH can coherent demodulation on DL, and differential coherent demodulation on UL.Interference on interference that transmitted in packets causes and normal speech and the data channel is similar.
Set up and in 1 to 2 second, to realize owing in common cdma system, connect, and this is unacceptable when packet data transmission, therefore must seek other approach.
According to the present invention, especially for grouping, accelerating power control and channel estimating help to obtain suitable throughput performance.In addition, should be noted that optimization,, guarantee the acceptable mistake that prevents when long grouping simultaneously to realize low overhead and time delay to short grouping to a PRCH coding and an insert method.
This PRCH will be discussed below and be integrated in enforcement in the whole system.
The PRCH channel:
As shown in Figure 1, provide the packet wireless business of being invented via PRCH for all MS in the sub-district of network system.Each BS11.1,11.2 according to RNC/MCN12, and one or more PRCH are set up and stopped to 13 demand.Implement according to first, PRCH is the dissymmetrical channel of a full duplex, can be with variable user data rate independent operation on both direction, for example for existing C ODIT system up to 9.6kbps (narrow band channel) or up to 128kbps (in take a message).MCN13 can link a plurality of mobile subscribers on the PRCH.As a result, the mobile subscriber must professionally for this reason register on MCN before inserting this channel.For distinguishing the different user on the PRCH, when MCN approved this access, it distributed a virtual connections identifier (VCI) for each MS.VCI represents with q bit, and in the band of position by MCN control, promptly is used as unique address in a Microcell.The MS that must select the number of q to make all link on the PRCH can be by independent addressing.Under the preferable case, structure PRCH in the time slot (frame) of 10ms, thus between MS and network, transmit the segmentation grouping.
MCN can be on DL sends user data packets to one or several user, and transmits to be used to control on UL and insert and the information of data forwarding.On UL, when channel (PRCH) was marked as " free time ", MS competed the access of short time period.After obtaining access, each MS sends to network with grouping.Logic channel PRCH is mapped on the single one physical channel, and this channel comprises physical data channel (PDCH) and physical control channel (PCCH); Therefore, support that a PRCH only needs a single base station transceiver.This means that according to the present invention the base station that support contains 10 CDMA Channel of 10 transceivers can provide 9 CDMA Channel and 1 PRCH.That is, adopt a transceiver to support Packet data service.
Fig. 2 A and 2B have explained and how PRCH have been merged in the C face of CODIT protocol architecture.According to as article " the wireless protocols structure of CODIT UMTS system ", E.Berruto et al., Proceedings of 1994 International Zurich Seminar on DigitalCommunications (1994 international Zurich digital communication seminar collected works), March 1994, Springer, the OSI(Open Systems Interconnection) reference model of describing among the Lecture Notes in Computer Science is with the structural stratification of describing among Fig. 2 A and the 2B.This structure is divided into physical layer (the 1st layer) 20, data link layer (the 2nd layer), and network layer (the 3rd layer) 24.Data link layer is further divided into three parts, that is, and and data link control (DLC) 23 and two middling speed access controls (MAC) part 21 and 22.DLC layer 23 relates to link establishment, discharges and maintenance.The MAC of the lower floor part of representing with MAC* 21 can exist under multiple situation, and upper strata MAC part 22 (MAC**) is special-purpose.Physically, two MAC parts 21 are separated at the physics end with 22, because say that as the note on Fig. 2 B the right MAC** partly is arranged in RNC, and underclad portion MAC* is present in each base station.
Referring to Fig. 2 A, the nothing of the 3rd layer (being network layer 24) connects Packet Service (CLPS) entity 25.1 provides packet wireless business for the mobile subscriber, and referring to Fig. 2 B, the CLPS entity 25.2 of network terminal provides the mobile subscriber to register and identifies required all devices, distribution is also managed its VCI, and link packet data network.CLPS entity 25.1 and 25.2 uses Logical Link Management person (LLA) 26.x sending the Information Selection route to its peer entity via a common Dedicated Control Channel (DCCH) 27.x at the beginning.MS is with after PRCH links to each other, and is all information that exchanges between CLPS entity 25.x and user data packets orientations via separately PRCH28.x usually.In the case, control grouping and user data packets arrive packet radio (PR) controlled entity 30.x by DLC29.x.Come for these packet segmentations and use error control code with separately unit 31.x, promptly block code (BC) is protected, in order in receiving terminal detected transmission error.After this entity 32.x transmits on PDCH33 with its convolutional encoding and interleave (IL) then.Also can transmit some control informations, for example power control through PCCH34.Referring to Fig. 2 B, at receiving terminal, these sections are reproduced from acceptance sampling, ressemble into grouping, and are transmitted to target CLPS entity 25.2.Work as decoder, promptly the packet decoder under the block encoding transmitted in packets situation when detecting the reception of an erroneous packet section, provides an automatic repeat request (ARQ) design in PR control, transmits again to ask it.
To describe hereinafter how a mobile subscriber to be linked on the Packet Data Channel or with it and therefrom separate at first.
PRCH connection/separable programming:
Suppose that MS is in " broadcasting activates " state, promptly the MS receiver has obtained symbol synchronization and frame synchronization, and is just answering broadcast channel (BCH).Carry out following behavior now according to the present invention:
1. when a mobile subscriber asks MS that its transceiver is linked PRCH, it is carried out common access at random and sets up DCCH27.1, thus exchange of signaling message only.In this process, that MS is operated in is so-called " inserting at random " state.Having described this in the article of above-mentioned A.Baier et al. inserts at random.
2. after setting up DCCH27.1, MS is in " connect and set up " state.Now MS can send to MCN with message " PRCH connection request ", thereby shows its destination address for all groupings that will send.
3. in the process that receives " PRCH connection request " message, MCN detects the communication traffic load on the PRCH, carries out in the band of position and identifies, registers MS and corresponding target address thereof, and a VCI is distributed to MS.MCN have V parameter CI and DCCH27.1 by transmission and the PRCH28.1 that distributed between phase place and the message " PRCH inserts approval " of vertical shift, allow MS to insert PRCH28.1.
4. when MS received " PRCH inserts approval " message, MS was transferred to PRCH28.1 with its transceiver, and began operating in " linking to each other with PRCH " state.In the case, the MS receiver is answered downgoing line, thereby receives the packet of carrying its VCI and uplink PRCH control information.If BS indication uplink PRCH is idle, as described below, the MS transmitter can preset a data packet transmission to network terminal.
5. when MS or RNC want MS separated,, thereby MS is changed back " broadcasting activation " state from PRCH via a PRCH exchange message " PRCH divides opening request ".
Hereinafter relate to data packet transfers via PRCH.
Data on the PRCH channel shift:
As other channel in the existing cdma system, PRCH is mapped on PDCH33 and the PCCH34, and the two preferably has the 10ms frame structure according to present embodiment.Yet the 5ms subframe structure that superposeed on PCCH34 is to allow exchanging access control information in the time interval, between MS and BS at 5ms.Prolonging in short-term when realizing short transmitted in packets advised a kind of coding method for PRCH, comprising an inner product sign indicating number and an outer circulation redundancy detection (CRC) yard.As long as the error of a segmentation grouping of the outer-decoder of receiving terminal indication just needs to transmit again.Access to PRCH is controlled by a kind of the detection with the multiple access protocol of collision detection (CSMA/CD) based on carrier wave, and may combine with a kind of reservation mode, and the support that the time limit with bounded time-delay requirement is used is provided.Hereinafter, will the CSMA/CD part of this agreement be described mainly.This CSMA/CD agreement is applied in such system usually, and promptly transmitter can detect the free time and the conflict stage of access channel rapidly.In local area network (LAN), be extensive use of CSMA/CD, for example Ethernet (IEEE 802.3 standards).According to the present invention, be entitled as hereinafter getting the bid described in " CSMA/CD middling speed access control protocol " joint, provide carrier wave to detect and collision detection by BS.
Downgoing line (DL):
The segmentation user data packets must be passed to a registration MS from RNC via PRCH, and transmits on DL PDCH via Radio Link.Support channel access control and above data to shift needed control information, transfer to MS from network terminal via DL PDCH or DL PCCH.For example on DL PDCH, send the request of transmission again that the mistake on the UL is received packet section to former MS; Certainly, these requests can be loaded on the user data frame.On DL PCCH, current at the data rate that uses on the DL PDCH and the data rate that will use on UL PDCH in a plurality of frames of next 10ms frame to all relevant MS indications, this is that the utmost point has benifit.And, all relevant MS broadcasting are taken/idle marker, in next frame, whether allow to insert at random with indication.All control informations are all protected, to guarantee the reliable delivery of MS.At last, on DL PCCH, also transmit some unprotected power control bit.
Uplink (UL):
At first the situation of Kao Lving is, has only a registration MS to have a grouping that will send at present.
1.MS in PR controlled entity 30.1 detect DL PRCH.When taking of receiving via this DL PCCH/idle marker indication " UL free time in the next frame ", PR control 30.1 its transceivers of starting are in order to begin to carry out so-called power ascension process in the following 10ms time interval on UL PCCH.
2. during power ascension, MS launches a lead code on UL PCCH, and progressively increases transmitting power.The MS receiver is answered the power control information that receives simultaneously on DL PCCH.If reach target power level, MS stops power ascension and begins following the tracks of.
3. during receiving lead code, BS catches symbol synchronization and estimates channel.Simultaneously, BS broadcasts " UL takies in the next frame " on the DL PCCH that is everlasting, start random access procedure to avoid other MS in next frame.
4. at power ascension after the stage, MS launches its first coding groups section on UL PDCH, and in a UL PCCH 5ms subframe its VCI of emission.If also must send other segmentation with the transmission grouping on Radio Link, MS produces a multiframe sign, and this sign also transmits through UL PCCH.
5. when BS detected VCI, it confirmed this VCI in the 2nd 5ms subframe on DL PCCH at once.If do not obtain this affirmation, MS stops to launch segmentation at once.
6. when BS received the first coding groups section with the multiframe sign that produced, BS indicated " UL takies in the next frame " on DLPCCH.Unit 32.2 and 31.2 is with the packet section decoding and detect error, sends PR control 30.2 then to.
7.MS next coding groups section of emission on UL PDCH.When having launched last frame, cut off the multiframe sign in first subframe on UL PCCH.
8.BS will receive the packet section decoding and it will be sent to PR control 30.2.When BS detects last frame, broadcasting " UL free time in the next frame " in its second subframe on DL PCCH, thus allow once more to insert at random.
Selectively, MS can launch the number of the packet section that will transmit on UL PCCH after power ascension at once on Radio Link with VCI.After successfully receiving these two parameters, BS indicates " UL takies in the next frame " on DL PCCH, equates with the number of advance notice until the segmentation number of correct reception.When having implemented this option, need not transmitting multi-frame sign on UL PCCH.To consider have two or more MS to have the grouping that to launch at present now.
Except BS is restricted to the gross power of all competition MS the target power, all competition MS carry out power ascension by the description in above-mentioned stage 1 and 2.In the stage 3, BS starts reception regularly, and avoids new competitor.Then, begin emission described in competition MS such as stage 4.If BS detected less than VCI in the stage 5, thereby it does not confirm that arbitrary competition BS forces them to stop emission immediately, thereby and attempts individually to insert PRCH over time and launch whole group again.In addition, BS broadcasts " UL free time in the next frame " on DL PCCH, inserts at random in order to allowing once more.Yet if BS detects the VCI of a BS, it confirms this (by force) MS, and causes other competitor to stop emission immediately, thereby and attempts individually to insert PRCH over time and launch whole group again.Described in the above-mentioned stage 6～8, the MS and the BS that are identified proceed then.
Consider that at last the MS that present neither one is registered has the grouping that will launch.
If BS does not detect any signal energy in the stage 3, it is in broadcasting " UL free time in the next frame " on DLPCCH in the next frame.
CSMA/CD middling speed access control protocol:
Because existing system is based on the 10ms frame structure, has adopted the branch time slot MAC agreement that has the 10msPRCH frame corresponding with time slot.Opposite with the 10ms frame structure among the PDCH, the PCCH channel adopts the 5ms subframe structure.
In Fig. 3 A and 3B, indicated the flow chart of UL MAC agreement among BS and the MS respectively.Suppose that time quantum is corresponding to a 10ms frame, k represents current frame number.BS indicates in next frame transmission rate R required on the UL on DL PCCH channel.Variable bit rate R can select from the predetermined transmission rate of a for example cover, thereby total the interference is no more than the budget threshold value.
R=0 is illustrated in the UL free time in the next frame.Only detecting R=0, after promptly carrier wave detected, the MS that links to each other with the PRCH channel could insert UL in next frame, as long as they have a grouping of will (again) launching.According to this method, on UL PCCH channel, MS launches a lead code, and its initial power is lower than target power about 10 to 20dB, the open Loop Power control indication of describing in the article of this target power by for example above-mentioned A.Baier et al..At power ascension stage (10ms), regulate the transmitting power of MS according to the power control instruction on the DL PCCH channel, this instruction can be operated in 2kbit/s, so that the gross power that receives from all MS of current this channel of access and as much as possible near the target power of closed power control.
Whether BS surpasses a predetermined threshold according to detected total signal energy, and indication UL PRCH " takies " (R＞0) or " free time " (R＜0) in next frame.If R=0, in order to insert this channel, MS launches lead code again in next frame.If yet R＞0, MS launches a 10ms Frame with data rate R on UL PDCH channel, and on UL PCCH channel launching code virtual connections identifier (VCI) and additional mark M.M=1 informs that BS has more frame to launch, and M=0 shows do not have other frame to arrive.Suppose BS successfully with single VDI decoding and M=1, this shows required UL transmission rate R＞0 in the next frame on DL PCCH.If BS decoding VDI fails or detects M=0, this shows next frame R=0 " free time ".In case MS detects R＞0,, just continue on UL PDCH, to launch data if it has another frame will send (M=1).
On the other hand, MS stops to launch data after detecting R=0 because it or suffer from conflict--first LOF of this grouping, must launch this grouping again--perhaps since it launched a grouping that only comprises a frame.
Sequential chart among Fig. 4 has been explained " success " on the UL PRCH channel, " conflict " and " free time " stage.During first 10ms frame K=1, detect after the last frame sign M=0 of MSx frame, BS first frame of DL PCCH channel back half in 41, with the second frame k=2 on the R=0 indication UL with the free time.Owing to have only MSy to have the grouping that will launch in the example that Fig. 4 describes, it is in starting power lifting during the second frame k=2 (triangle 46 of band shade) on the UL PCCH channel.After detecting some signal energies among the BS first 5ms42, by the UL transmission rate R=R of next frame in the indication DL PCCH channel at second frame
1, it notifies all MS, and UL will take during the 3rd frame k=3.In the 3rd image duration, MSy on UL PCCH channel with speed R
1The transmission data, and at UL PCCH channel VCIy and M=1.BS decodes the VCIy of MSy, and by on DL PCCH channel, indicating R=R
1, notifying all MS once more, UL will take during the 4th frame k=4.Because the grouping 43 (data y) of MSy has only two frame lengths, MSy notifies BS with M=0 in the first half 44 of the 4th frame k=4, transmitting last Frame.After the 4th frame detected R=0 at last, MSx and MSz attempted to insert UL by power ascension (triangle 45 of band cross-hatched) during the 5th frame k=5.Because BS do not detect VCI in the 6th frame, it by the R=0 indication in next frame UL with the free time.MSx and MSz arrive conflict in the end point detection of the 6th frame k=6, stop to transmit data then.BS does not detect enough signal energies yet in the 7th frame k=7, UL keeps idle (R=0) in next frame.
Figure 5 shows that a kind of possible embodiment that comprises transmitter 50 parts of the present invention.This transmitter is called " the wireless access design based on CDMA of UMTS " with one piece, P.-G.Andermoet al., and IEEE Personal Communications, February 1995, and the transmitter of describing in the article of pp.48-53 is the basis.Be construction unit 51 topmost.Owing to receiving relevant carrier frequency from explorer, but after the application message of chip rate and task identifier, how its may command is with the information coding, multiplexing and be converted to RF, and its effect is very important.When connecting when having set up, the radio resource manager that is arranged in network is determined these based on the required business of user, the parameter of the business that promptly provides in special area and real system load.As shown in Figure 5, information transmitted on the Different Logic channel, to enter from the left-hand side.These logic channel portability voice, user data and control informations.The latter is expressed as Dedicated Control Channel (DCCH) 52, and carries for example measurement report, handover instruction or the like, and the former two and grouped channels of the present invention 53 are included into the Traffic Channel class, are expressed as TCH/S respectively, TCH/D and PRCH.As Fig. 2 A, shown in the 2B and 5,, use convolution coder and interpolater 32.2 then by block encoder 31.2 is provided, can realize Packet Service of the present invention.
According to another embodiment of the present invention, the user data rate on can a kind of dynamical fashion assigns packet data channel is for example according to the current communication traffic load on this channel.
This grouping data transmission method provides high packet throughput, and is special in very short grouping.Yet it is equally applicable to other message and grouping and uses, Email for example, and TV shopping and TV bank, and vehicle scheduling or fleet management use.
Claims (25)
1. in order to the method for wirelessly transmitting data in code division multiple address communication system grouping, use a CDMA channel to realize with a kind of time-sharing format in this system from several transmitting station (MSy, MSz) to the transmission of packet between a receiving platform (BS), comprising following several steps: ● give the corresponding receiving platform (BS) of described communication system from request of a transmitting station (MSy) emission, with the destination address of indicating described packet will select route to be sent to, ● register described transmitting station (MSy) and distribute a special-purpose virtual connections identifier (VCIy) for it, ● described transmitting station (MSy) is transferred to the described CDMA channel that is used for transmission of data packets, ● answer the described downgoing line that is used for the CDMA channel of transmission of data packets, broadcast this channel with " free time " until corresponding receiving platform (BS), promptly in next frame, allow arbitrary to the described access that is used for the CDMA channel of transmission of data packets, ● during described next frame, promote the transmitting power of described transmitting station (MSy), until the power stage that reaches an appointment, ● via the described uplink that is used for the CDMA channel of transmission of data packets, described packet and described virtual connections identifier (VCly) are emitted to described receiving platform (BS), ● route is reselected in described packet be sent to described destination address, control to the described access that is used for the CDMA channel of transmission of data packets by a multiple access protocol based on carrier wave detection and collision detection.
2. the process of claim 1 wherein that described communication system provides a kind of connectionless Packet data service.
3. the method for claim 1, at least two transmitting station (MSx in the wherein said communication system, MSz) prepare transmit data packet and also carry out described power ascension independently, and wherein said receiving platform (BS) competes all against transmitting stations, and (MSx, gross power MSz) is restricted to a target power.
4. the process of claim 1 wherein the data rate that described receiving platform (BS) uses in next frame or multiframe to described transmitting station (MSy) indication on the uplink of the described CDMA channel that is used for transmission of data packets.
5. the process of claim 1 wherein and during power ascension, power control information is fed back to described transmitting station (Msy) from described receiving platform (BS).
6. the process of claim 1 wherein and have only when the communication traffic load on the network allows, could register a transmitting station (MS).
7. the process of claim 1 wherein and use a long spreading code to come transmission of data packets.
8. the method for claim 7 is wherein used an inner product sign indicating number and an outer circulation redundancy detection sign indicating number.
9. the process of claim 1 wherein and on the uplink and downlink circuit of the described CDMA channel that is used for transmission of data packets, adopt coherent demodulation.
10. the method for claim 9, the wherein said physical control channel coherent demodulation on downgoing line that is used for the CDMA channel of transmission of data packets, differential ference spiral on uplink.
11. the method for claim 1, the wherein said CDMA channel that is used for transmission of data packets is the dissymmetrical channel of full duplex, can be on both direction for narrow band channel with up to 9.6kbps or in take a message with variable user data rates independent operation up to 64kbps.
12. the process of claim 1 wherein that the described CDMA channel (PRCH) that is used for transmission of data packets constructs in 10ms time frame mode.
13. the process of claim 1 wherein and use described data packet services to exchange the grouping of E-mail class.
14. the method for claim 1 or 3, if wherein can not detect arbitrary virtual connections identifier (VCIx, VCIz), described receiving platform (BS) do not confirm arbitrary competition transmitting station (MSx, MSz).
15. the method for claim 14, if wherein do not receive described affirmation from described receiving platform (BS), (MSx MSz) stops launching and attempting to insert afterwards the described CDMA channel of transmission of data packets that is used for to launch all packets again described competition transmitting station immediately.
16. the process of claim 1 wherein thereby the data packets segmentation is suitable for the described frame that is used for the CDMA channel of transmission of data packets.
17. the process of claim 1 wherein can be a kind of dynamical fashion distribute data rate on the described CDMA channel that is used for transmission of data packets, for example according to the current communication traffic load on this CDMA channel that is used for transmission of data packets.
18. code division multiple address communication system in order to the wirelessly transmitting data grouping, wherein use a CDMA channel to realize from several transmitting station (MSy with a kind of time-sharing format, MSz) to the transmission of packet between a receiving platform (BS), comprising: ● in order to a request is sent to the device of the corresponding receiving platform (BS) of described communication system from described transmitting station (MSy), with the destination address of indicating described packet will select route to be sent to, ● register described transmitting station (MSy) and distribute the device of a special-purpose virtual connections identifier (VCIy) for it, ● described transmitting station (MSy) is transferred to the described device that is used for the CDMA channel of transmission of data packets, ● answer the described downgoing line that is used for the CDMA channel of transmission of data packets and broadcast this channel with " free time " until described receiving platform (BS), the device that promptly in next frame, allows the described CDMA channel that is used for transmission of data packets to insert at random, ● during described next frame, promote the transmitting power of described transmitting station (MSy), until the device that reaches a certain power level, ● on the uplink of the described CDMA channel that is used for transmission of data packets, described packet and described virtual connections identifier (VCIy) are transferred to the device of described receiving platform (BS), ● the device that route is sent to described destination address is reselected in described packet, ● detect multiple access protocol with collision detection by a kind of based on carrier wave, control to the device of the access of the described CDMA channel that is used for transmission of data packets.
19. the system of claim 18, wherein said receiving platform (BS) comprises, in order to described transmitting station (MSy) is indicated the device of the data rate that will use in the described uplink that is used for the CDMA channel of transmission of data packets during next frame or multiframe.
20. the system of claim 18 or the transceiver of claim 19 comprise with a long spreading code the device of the data packet coding that will transmit.
21. the system of claim 18, the wherein said CDMA channel that is used for transmission of data packets is the dissymmetrical channel of full duplex, can be on both direction for narrow band channel with up to 9.6kbps or in take a message with variable user data rates independent operation up to 64kbps.
22. the system of claim 18, the wherein said CDMA channel (PRCH) that is used for transmission of data packets is constructed in 10ms time frame mode.
23. the transceiver that is used for the wirelessly transmitting data grouping that in code division multiple address communication system, uses, wherein use a CDMA channel to realize from several transmitting station (MSy with a kind of time-sharing format, MSz) to the transmission of packet between a receiving platform (BS), comprising: ● in order to a request is sent to the device of the corresponding receiving platform (BS) of described communication system from described transmitting station (MSy), with the destination address of indicating described packet will select route to be sent to, ● described transmitting station (MSy) is transferred to the described device that is used for the CDMA channel of transmission of data packets, ● the downgoing line of answering described channel is broadcasted this channel with " free time " until described receiving platform (BS), promptly in next frame, allow a described device that inserts at random that is used for the CDMA channel of transmission of data packets, ● during described next frame, promote the transmitting power of described transmitting station (MSy), until the device that reaches a certain power level, ● on the uplink of the described CDMA channel that is used for transmission of data packets, described packet and described virtual connections identifier (VCIy) are transferred to the device of described receiving platform (BS).
24. the transceiver of claim 23, wherein said transmitting station (MSy) comprise, in order to regulate the device of the data rate that will use in the described uplink that is used for the CDMA channel of transmission of data packets by the indication of receiving platform (BS).
25. the transceiver of claim 23 comprises in order to the device with the data packets segmentation, thereby makes it be suitable for the described frame that is used for the CDMA channel of transmission of data packets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95197895 CN1092436C (en) | 1995-06-14 | 1995-06-14 | Packet data transmission in code-division multipel access communication systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95197895 CN1092436C (en) | 1995-06-14 | 1995-06-14 | Packet data transmission in code-division multipel access communication systems |
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| CN1186581A CN1186581A (en) | 1998-07-01 |
| CN1092436C true CN1092436C (en) | 2002-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 95197895 Expired - Lifetime CN1092436C (en) | 1995-06-14 | 1995-06-14 | Packet data transmission in code-division multipel access communication systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8009549B2 (en) | 2005-11-17 | 2011-08-30 | Panasonic Corporation | Carrier allocation method in multi cell orthogonal frequency division multiple access system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW512639B (en) * | 2000-01-14 | 2002-12-01 | Interdigital Tech Corp | Wireless communication system with selectively sized data transport blocks |
| DE10107703A1 (en) * | 2001-02-19 | 2002-08-29 | Siemens Ag | Method and device for data transmission according to a hybrid ARQ method |
| KR100450968B1 (en) * | 2001-06-27 | 2004-10-02 | 삼성전자주식회사 | Apparatus and method for transmitting and receiving data in a cdma mobile communication system |
| DE60206715T2 (en) * | 2001-08-07 | 2006-07-13 | Kabushiki Kaisha Toshiba | Wireless communication system and wireless station |
| US9014196B2 (en) | 2002-09-17 | 2015-04-21 | Broadcom Corporation | System and method for providing a super channel in a multi-band multi-protocol hybrid wired/wireless network |
| US20040208199A1 (en) * | 2003-04-16 | 2004-10-21 | Bo Li | Data encoding for simultaneous bus access |
| CN101425831B (en) * | 2003-06-18 | 2012-12-19 | 日本电信电话株式会社 | Radio packet communication method |
| CN100452745C (en) * | 2007-02-16 | 2009-01-14 | 北京航空航天大学 | Multi-address access method with the confliction decomposition |
| US8351464B2 (en) * | 2007-10-02 | 2013-01-08 | Infineon Technologies Ag | Retransmission in data communication systems |
| CN101772144B (en) * | 2009-01-06 | 2012-10-17 | 华为技术有限公司 | Method, device and system for processing physical downlink control channel in multi-carrier system |
| CN101945004A (en) * | 2009-07-10 | 2011-01-12 | 华为技术有限公司 | Communication method of support system and network management system, interface convergence device and communication system |
-
1995
- 1995-06-14 CN CN 95197895 patent/CN1092436C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8009549B2 (en) | 2005-11-17 | 2011-08-30 | Panasonic Corporation | Carrier allocation method in multi cell orthogonal frequency division multiple access system |
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| CN1186581A (en) | 1998-07-01 |
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