CN1764095A

CN1764095A - Structure of downlink channel in multi carrier/ds-cdma mobile comunication system

Info

Publication number: CN1764095A
Application number: CNA200510090500XA
Authority: CN
Inventors: 新博行; 安部田贞行; 大川耕一; 池田武弘; 佐和桥卫; 安达文幸
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2000-02-02
Filing date: 2001-02-02
Publication date: 2006-04-26
Anticipated expiration: 2021-02-02
Also published as: CN1725678A; CN1734993A; CN100586051C; JP2001217749A; JP3522623B2

Abstract

The present invention provides a single carrier/DS-CDMA packet transmission method wherein a predetermined time slot is assigned to reservation demand packet transmission in regard to a spreading code, and the reservation demand packet and data packets are time-multiplexed for transmission. An uplink packet transmission method in a multi-carrier/DS-CDMA mobile communication system is also provided, wherein frames are set up in each communication channel of a subcarrier, time slots which are time-segments of the frames are set up further, and a mobile station spreads a packet to be transmitted by a spreading code and the information signal is transmitted to a base station in a predetermined time slot. A downlink channel configuration in a multi-carrier/DS-CDMA mobile communication system is further provided, wherein a plurality of communication channels assigned to each of a plurality of subcarriers are divided for every predetermined time frame, and multiplexed, and the plurality of the communication channels assigned to each subcarrier include a common-control channel used by a plurality of users in common, and communication channels peculiar to each user.

Description

The down channel structure of multicarrier/DS-CDMA mobile communication system

The application is to be February 2 calendar year 2001, application number the dividing an application for the application for a patent for invention of " single carrier/DS-CDMA packet transmission method and multicarrier/DS-CDMA mobile communication system uplink packet transmitting method and multicarrier/DS-CDMA mobile telecommunication system down channel architecture " that be 01800154.8 (international application no is PCT/JP01/00750), denomination of invention the applying date.

Technical field

The present invention relates to DS-CDMA (direct sequence CDMA connection) mobile communication, especially relate to single carrier/DS-CDMA mobile communication and multicarrier/DS-CDMA mobile communication.

Background technology

About the DS-CDMA mobile communication, what adopt is single carrier/DS-CDMA mobile communication and multicarrier/DS-CDMA mobile communication all the time.

When the grouping of carrying out in the grouping (Packet) under single carrier/DS-CDMA upstream packet load mode transmits, connect calling out, take to divide regularly mode efficient that the diffuse code that is used in communication and time slot transmit than higher.

At this moment, multiplexing process is effectively carried out in the packet that is necessary the reservation grouping that is used for distribution such as diffuse code and time slot reservation and is used to transmit real data.In the past, owing to may carry out control by probability to reservation grouping transmission, so to such an extent as to often generation reservation packet collisions phenomenon transmission efficiency is low when the traffic is higher.

On the other hand, about multicarrier/DS-CDMA mode, be at " Perfomance oforthogonal CDMA codes for quasi-synchronous communication system " (V.DaSilva at first, E.Sousa:Proc.Of ICUPC ' 93, vol 1.2, pp995-999,1993) did in the paper to inquire into.

Multicarrier/DS-CDMA is different with the single carrier/CDMA that transmits the CDMA signal with single carrier wave, and it is with by radio is transmitted frequency band, cuts apart with plural subcarrier parallel convey CDMA signal.

Therefore, the rate of information throughput of each subcarrier diminishes, thereby and owing to the speed that information signal is spread the diffusion signal that generates the CDMA signal also diminishes thereupon.In view of the above, same single carrier/DS-CDMA compares, and under the occasion of multicarrier/DS-CDMA, can the Qie Pu (chip) of diffusion signal be extended.The long lengthening of Qie Pu just can reduce the influence of step-out between the diffuse code.Utilize these characteristics just, pointed out in the above-mentioned paper in a kind of communication of travelling carriage of mobile communication system and introduced multicarrier/DS-CDMA, to realize the scheme of accurate synchronous driving to base station.

In addition, about multicarrier/DS-CDMA, also carried out the link level specificity analysis.

At " On the Perfomance of Multi-carrier DS CDMA System " (S.Kondoand L.B.Milstein:IEEE Transactions onCommunications, Vol.44, no.2, pp288-246, February 1996) just did the specificity analysis that exists under the narrow band interference environment in the literary composition.It discloses: multicarrier/DS-CDMA has better characteristic than single carrier/DS-CDMA.

Yet, in the past about the discussion of multicarrier/DS-CDMA mode, based on the link level specificity analysis, and never inquired into this class problem: when this mode was applied to mobile communication system, how travelling carriage communicated, how to transmit control signal etc. with base station.

Also have, all be to be prerequisite with the used usually circuit switching mode of existing mobile communication system (all safeguarding the exchanged form of private communication channel when promptly sending signal by sender to receiver from start to finish) in discussing in the past.

At present, digital mobile communication system (such as PDC standard, GSM standard) all is conceived to voice communication services.In system design all based on circuit switched.Even if the portable phone system of future generation (such as IMT-2000) that will introduce in the future though it estimates to use the packet transfer services mode, remains based on circuit switched in system design.In this radio transmission system based on circuit switched, up channel number with downgoing line is the same substantially, and up channel with downgoing line is corresponding one by one during data communication.Therefore, when each user's transfer control instruction, also to use corresponding channel with each user.

And in contrast, the multi-carrier mobile communication that is considered to need in the future to increase then is an asymmetric communication.Also promptly, the traffic nearly all is descending when data are downloaded; And on data when dress the traffic nearly all be up, answer signal has only been considered in descending aspect.At this moment, if only use a channel distributing to each user in sending each user's control command, information transfer efficiency is certain to very poor.

On the other hand, in recent years, multicarrier/DS-CDMA mobile communication system is regarded as carrying out the mobile communication system of high speed information transmission and receives publicity.As mentioned above, the link information conveying capacity is asymmetric up and down when carrying out high speed data communication such as multimedia under this multicarrier/DS-CDMA mobile communication system, yet up to now, the method nobody who constructs down channel at this asymmetric case proposed.

Summary of the invention

The object of the invention generally speaking just is to solve existing problem in the above-mentioned prior art, and improved single carrier/DS-CDMA packet transmission method and multicarrier/DS-CDMA mobile communication system uplink packet transmitting method and multicarrier/DS-CDMA mobile telecommunication system down channel architecture is provided.

Promptly, the present invention's first purpose is to provide a kind of single carrier/DS-CDMA packet transmission method and load mode, in view of the above, can preengage the multiplexing process of grouping and packet efficiently, improve transmission efficiency, but also can carry out neatly preengaging the control of grouping and the shared channel width of packet corresponding to the increase and decrease of the traffic.

The present invention's first purpose is achieved as follows:

The present invention is a kind of single carrier/DS-CDMA packet transmission method, with the diffuse code sequence information symbol is carried out bandwidth expansion, utilizes this diffusion signal of having been expanded by bandwidth to transmit grouping; It is characterized in that: all or a part of to diffuse code, transmit usefulness for the reservation grouping regulation time slot allocation, will preengage and divide into groups and the packet time division multiplexing transmits.

Moreover, single carrier of the present invention/DS-CDMA packet transmission method, with the diffuse code sequence information symbol is carried out the bandwidth expansion, utilize this diffusion signal of having been expanded by bandwidth to transmit grouping, it is characterized in that: (0＜k＜N) is individual to be distributed to the reservation grouping and transmits usefulness, will preengage to divide into groups and packet transmits with code division multiplexing to take out k among the diffuse code that adds up to N.

Further, can also have following arbitrary feature:

When the data packet channel occupation rate surpasses certain setting, reduce previously selected reservation grouping and send the possibility probability;

When the data packet channel occupation rate surpasses certain setting, reduce and distribute to the diffuse code number that the reservation grouping transmits usefulness, distribute to the diffuse code number that packet transmits and increase;

When the data packet channel occupation rate surpasses certain setting, at first reduce previously selected reservation grouping and send the possibility probability, although send the possibility probability when having reduced the reservation grouping, when the data packet channel occupation rate still surpasses setting, then then reduce again and distribute to the diffuse code number that the reservation grouping transmits usefulness.Distribute to the diffuse code number that packet transmits usefulness and increase;

When the data packet channel occupation rate surpasses certain setting, at first reduce and distribute to the diffuse code number that the reservation grouping transmits usefulness, although distribute to the diffuse code number that the reservation grouping transmits usefulness when having reduced, when the data packet channel occupation rate still surpasses setting, then then reduce previously selected reservation grouping again and send the possibility probability;

Channel occupation rate to the data grouping detects, thereby selected the reservation divides into groups operable diffuse code number and preengage grouping to send the possibility probability;

With time division multiplexing work downwards accuse channel insert said reservation divide into groups that operable diffuse code number and reservation grouping send may probability;

Reservation is divided into groups and the code that bandwidth is expanded is carried out in packet to use short period diffuse code (Short code) to oppose;

Use the short period diffuse code to oppose and preengage the code that the bandwidth expansion is carried out in grouping, and use long period diffuse code (Long code) to do the code that bandwidth is expanded is carried out in packet.

The present invention's second purpose is to provide a kind of uplink packet transmitting method of multicarrier/DS-CDMA mobile communication system of novelty, can realize in view of the above transmitting grouping with variable transfer rate.

The present invention's second purpose is achieved as follows:

The present invention is the uplink packet transmitting method of a kind of multicarrier/DS-CDMA mobile communication system, said multicarrier comprises the individual subcarrier of n (n for greater than 2 natural number), it is characterized in that: the communication channel of each said subcarrier is established at regular intervals and the frame divided; Further, this frame is set out F (F is the natural number more than 2) time slot dividing again on the time shaft; Travelling carriage just according to the sequential of said time slot, spreads will send grouping to, sends to base station with diffuse code.

On the basis of the uplink packet transmitting method of above-mentioned multicarrier/DS-CDMA mobile communication system with n subcarrier, further, the present invention can also have following arbitrary feature:

Said travelling carriage is when transmitting grouping, transmit the reserve requests grouping, distribute time slot and diffuse code to said base station with request, request for allocation at travelling carriage, said base station distributes with regard to time slot and diffuse code, and said travelling carriage utilizes said base station institute's distributed time slot and with the diffuse code that is assigned with transmission spread in grouping;

Said travelling carriage does not distribute time slot to said base station request, and certain time slot transmits grouping on the communication channel but utilize randomly;

The conveying capacity size that transmits grouping corresponding to travelling carriage changes the travelling carriage transfer rate; Said base station distributes k1, and (k1 is a natural number, and k1≤F * n) individual time slot is made reserve requests grouping transmission time slot; And distributing the individual diffuse code of m1 (m1 is natural number, m1≤operable diffuse code sum) to be used for reserve requests grouping diffusion, said travelling carriage spreads the grouping of transmission reserve requests in assigned slot with some diffuse codes that is assigned with;

Said base station is corresponding to the reserve requests grouping number of travelling carriage in the stipulated time, and the grouping of change reserve requests transmits uses number of time slot k1;

Said base station is corresponding to the reserve requests grouping number of travelling carriage in the stipulated time, and the grouping of change reserve requests transmits with diffuse code number m1;

Said base station is corresponding to the reserve requests grouping number of travelling carriage in the stipulated time, and the grouping of change reserve requests transmits with number of time slot k1 and reserve requests grouping and transmits with diffuse code number m1;

Said base station will transmit limitation notification to the reserve requests grouping and then obey this restriction for the travelling carriage travelling carriage to carry out the reserve requests grouping and transmit under the too much situation of the reserve requests grouping number of travelling carriage in the stipulated time;

Said base station distributes k2, and (k2 is a natural number, the individual time slot of k2≤F * n) is made said travelling carriage and can the random process grouping is transmitted time slot but also distribute m2 (m2 is a natural number, m2≤can use the diffuse code sum) individual diffuse code is made random process grouping diffusion diffuse code, and travelling carriage spreads the grouping of transmission random process in assigned slot with some diffuse codes that is assigned with;

Said base station is corresponding to the random process grouping number of travelling carriage in the stipulated time, and the grouping of change random process transmits uses number of time slot k2;

Said base station is corresponding to the random process grouping number of travelling carriage in the stipulated time, and the grouping of change random process transmits with diffuse code number m2;

Said base station will change random process grouping transmission and transmit with diffuse code number m2 with number of time slot k2 and random process grouping corresponding to the random process grouping number of travelling carriage in the stipulated time;

Said base station will transmit limitation notification to the random process grouping and give travelling carriage under the too much situation of the random process grouping number of travelling carriage in the stipulated time, and travelling carriage is then obeyed this restriction and carried out the random process grouping and transmit;

Said base station distributes the individual diffuse code of p (p is a natural number, p≤can use the diffuse code sum) corresponding to the conveying capacity size of travelling carriage to travelling carriage;

Said base station distributes the different diffuse code of diffusivity corresponding to the conveying capacity size of travelling carriage to travelling carriage;

Said base station is corresponding to the conveying capacity size of travelling carriage, and (q is a natural number, the individual time slot of q≤F * n) to distribute q to travelling carriage;

Said base station is corresponding to the conveying capacity size of travelling carriage, (p is a natural number to diffuse code number p, p≤can use the diffuse code sum), (q is a natural number, and both change distribution at least among the three of q≤F * n) for the diffuse code of different diffusivitys and number of time slot q.

The present invention's the 3rd purpose provides a kind of down channel structure of overloading quilt/DS-CDMA mobile communication system, in view of the above, also can send control information to the user effectively even be under the asymmetric situation of up-downgoing transinformation content.

The present invention's the 3rd purpose is achieved as follows:

The present invention is the down channel structure of a kind of multicarrier/DS-CDMA mobile communication system, in this system, with the diffuse code sequence information symbol is carried out the bandwidth expansion, utilization has assigned frequency plural subcarrier at interval and sends through this bandwidth expansion gained diffusion signal, it is characterized in that: the plural communication channel of distributing to plural subcarrier is respectively distinguished by each regulation time frame and is re-used; The said plural communication channel of distributing to each subcarrier comprises the centralized control channel and the proprietary communication channel of each user of the public use of plural user.

Down channel structure according to such multicarrier/DS-CDMA mobile communication system, by base station when each user (travelling carriage) transmission information, be Proprietary Information or public information to each user all be contained in each subcarrier the centralized control channel in send.

Further, in order be effectively to send the information that it will be used when to base station transmission information to each user, on above-mentioned down channel architecture basics, the present invention also has following feature: the information that contains the uplink signal transmission that is useful on each user of control in the said centralized control channel.Be used to control transmission power control instruction, the control command that is used to control customer call that information that each user's uplink signal sends for example can comprise the transmitted power that is used to control each user (travelling carriage), be used to control each user sends signal with what frequency, diffuse code (containing diffusivity), time control command.

In order be effectively to send answer signal to its information of sending to the user, further, on above-mentioned down channel architecture basics, the present invention also has following feature: contain the response message to user's uplink signal transmission in the said centralized control channel.Response message to each user's uplink signal sends for example can comprise answer signal ACK (Acknowledgement), NACK (Non-acknowledgement) to uplink communication.

In order to send public announcements information to the user effectively, further, on above-mentioned down channel architecture basics, the present invention also has following feature: contain the concentrated advertised information to the user in the said centralized control channel.Advertised information to each user for example can comprise: broadcast messages such as time, sub-district (base station) information, this cell communication amount information, transport information and TV.

In order positively to carry out demodulation according to wireless radio transmission line status between base station and the user to downstream signal, further, on the capable channel architecture basis, the present invention can also have following feature: contain each user in the said centralized control signal and separate the used aiming symbol of timing to received signal above-mentioned.

Further, on above-mentioned down channel architecture basics, the present invention can also have following feature: just a part or all subcarriers, and to control channel in or the plural Code Channel allocation set.

Further, on above-mentioned down channel architecture basics, the present invention can also have following feature: be contained in the information type difference in the centralized control channel of each subcarrier.

Further, on above-mentioned down channel architecture basics, the present invention can also have following feature: the information in the centralized control channel of distributing to each subcarrier of being contained at the portion of time band of each time frame by time division multiplexing.

Further, on above-mentioned down channel architecture basics, the present invention can also have following feature: be contained in the information in the centralized control channel of distributing to each subcarrier, concerning each subcarrier, all be at each time frame with same sequential by time division multiplexing, be respectively by time division multiplexing with different sequential perhaps at each time frame.

Description of drawings

Fig. 1 is the schematic diagram of a kind of channel architecture of the 1st embodiment according to the present invention.

Fig. 2 is the schematic diagram of another kind of channel architecture.

Fig. 3 is the illustration figure that sends the control of possibility probability about the reservation grouping.

Fig. 4 is the illustration figure of diffuse code number assignment control.

Fig. 5 sends the illustration figure of distribution control of may probability and can be used to preengage the diffuse code number of grouping about reservation grouping.

Fig. 6 be the 1st embodiment send the illustration figure of distribution control of may probability and can be used to preengage the diffuse code number of grouping about reservation grouping.

Fig. 7 is the channel architecture illustration figure of descending announcement channel.

Fig. 8 uses the short period diffuse code to carry out the illustration figure of bandwidth expansion to reservation grouping and packet.

Fig. 9 is the illustration figure that the reservation grouping is carried out the bandwidth expansion with the short period diffuse code to the data grouping with the long period diffuse code.

Figure 10 is the 1st form schematic diagram of the 1st embodiment.

Figure 11 is the 2nd form schematic diagram of the 1st embodiment.

Figure 12 is the 3rd form schematic diagram of the 1st embodiment.

Figure 13 is the 4th form schematic diagram of the 1st embodiment.

Figure 14 is the 5th form schematic diagram of the 1st embodiment.

Figure 15 is the illustration figure of the channel architecture between travelling carriage and the base station under multicarrier/DS-CDMA mode of the 2nd embodiment.

Figure 16 is that the travelling carriage of the 2nd embodiment transmits the action illustration figure (its 1) of the control of being carried out when the grouping between the two to base station.

Figure 17 is travelling carriage transmits the control of being carried out when the grouping between the two to base station action illustration figure (its 2).

Figure 18 is travelling carriage transmits the control of being carried out when the grouping between the two to base station action illustration figure (its 3).

Figure 19 is that the reserve requests grouping of the 2nd embodiment transmits time slot allocation schematic diagram (its 1).

Figure 20 is that the reserve requests grouping transmits time slot allocation schematic diagram (its 2).

Figure 21 is that the reserve requests grouping transmits time slot allocation schematic diagram (its 3).

Figure 22 is that the reserve requests grouping transmits time slot allocation schematic diagram (its 4).

Figure 23 is that the reserve requests grouping transmits time slot allocation schematic diagram (its 5).

Figure 24 is that reserve requests grouping transmission is changed schematic diagram with number of time slot.

Figure 25 is that the reserve requests grouping transmits with diffuse code number change schematic diagram.

Figure 26 is that the reserve requests grouping transmits with number of time slot and diffuse code number change schematic diagram.

Figure 27 is that grouping transmits the key diagram of restriction about reserve requests.

Figure 28 is that the random process grouping of the 2nd embodiment transmits time slot allocation schematic diagram (its 1).

Figure 29 is that the random process grouping transmits time slot allocation schematic diagram (its 2).

Figure 30 is that the random process grouping transmits time slot allocation schematic diagram (its 3).

Figure 31 is that the random process grouping transmits time slot allocation schematic diagram (its 4).

Figure 32 is that the random process grouping transmits time slot allocation schematic diagram (its 5).

Figure 33 is that the random process grouping transmits number of time slot change schematic diagram.

Figure 34 locates to build grouping to transmit diffuse code number change schematic diagram at random.

Figure 35 is that the random process grouping transmits number of time slot and diffuse code number change schematic diagram.

Figure 36 is that grouping transmits the key diagram of restriction about random process.

Figure 37 is the key diagram (its 1) that distributes diffuse code corresponding to conveying capacity.

Figure 38 is the key diagram (its 2) that distributes diffuse code corresponding to conveying capacity.

Figure 39 is the key diagram that distributes number of time slot corresponding to conveying capacity.

Figure 40 is the key diagram (its 3) that distributes diffuse code corresponding to conveying capacity.

Figure 41 is the key diagram (its 1) corresponding to conveying capacity distribution time slot and diffuse code of the 2nd embodiment.

Figure 42 is the key diagram (its 2) that distributes time slot and diffuse code corresponding to conveying capacity.

Figure 43 is the key diagram (its 3) that distributes time slot and diffuse code corresponding to conveying capacity.

Figure 44 is the basic structure block schematic diagram of the base station of the 3rd embodiment according to the present invention.

Figure 45 is the 1st kind of centralized control channel generation unit structure block schematic diagram of the 3rd embodiment.

Figure 46 is the 2nd a kind of centralized control channel generation unit structure block schematic diagram.

Figure 47 is the 3rd a kind of centralized control channel generation unit structure block schematic diagram.

Figure 48 is the 4th a kind of centralized control channel generation unit structure block schematic diagram.

Figure 49 is the 1st kind of down channel structural representation of the 3rd embodiment.

Figure 50 is the 2nd a kind of down channel structural representation.

Figure 51 is the 3rd a kind of down channel structural representation.

Figure 52 is the 4th a kind of down channel structural representation.

Figure 53 is the 5th a kind of down channel structural representation.

Embodiment

Below, according to accompanying drawing embodiments of the invention are explained.

The present invention the 1st embodiment is the embodiment about single carrier/DS-CDMA packet transmission method.

Fig. 1 is the schematic diagram of a kind of channel architecture of the 1st embodiment according to the present invention.At this, the transverse axis of each channel and the longitudinal axis be express time and power respectively.With high speed diffuse code sequence information symbol is carried out bandwidth expansion, and with diffuse code Code1 ..., CodeN and time slot TS1 ..., TSM transmits this diffusion signal of having been expanded by bandwidth.At this moment, certain particular time-slot is distributed to the reservation grouping and transmit usefulness.

Diffuse code Code1 in Fig. 1 ..., CodeN and time slot TS1 ..., among the TSM, time slot TS1 is assigned to the reservation grouping and transmits usefulness, all the other time slot TS2 ..., TSM distributes to packet.

The distribution of this reservation grouping both can only be carried out a part of diffuse code, also can carry out all diffuse codes.

Fig. 2 is the schematic diagram of another channel architecture of the 1st embodiment according to the present invention.

At this, the transverse axis of each channel and the longitudinal axis be express time and power respectively.With high speed diffuse code sequence information symbol is carried out bandwidth expansion, and with diffuse code Code1 ..., CodeN and time slot TS1 ..., TSM transmits this diffusion signal of having been expanded by bandwidth.At this moment, certain particular time-slot is distributed to the reservation grouping and transmit usefulness.

In Fig. 2, diffuse code Code1 ..., CodeN and time slot TS1 ..., among the TSM, diffuse code Code1 to Codek is assigned to the reservation grouping and transmits usefulness, all the other Code (k+1) distribute to packet to Code N,

In general, as shown in Fig. 3 (A), terminal (portable terminal) may Probability p (0＜p＜=1) send the reservation grouping with a certain transmission when request call.

At this, when the data packet channel occupation rate surpasses certain setting, for avoiding preengaging packet collisions, for example (,) shown in Fig. 3 (B) like that, be reduced to q (0＜q＜p) sending possible probability.

In view of the above, can lower reservation packet collisions probability, raising transmission efficiency.

Fig. 4 is the illustration figure that can use the distribution control of diffuse code number about the reservation grouping.

At this, the transverse axis of each channel and the longitudinal axis be express time and power respectively.With high speed diffuse code sequence to information symbol carry out bandwidth expansion and with diffuse code Code1 ..., CodeN and time slot TS1 ..., TSM transmits this diffusion signal of having been expanded by bandwidth.At this moment, certain specific diffuse code is distributed to the reservation grouping and transmit usefulness.

Usually, such as shown in Fig. 4 (A), diffuse code Code1 to Codek is assigned to the reservation grouping and transmits and use.

At this moment, when the data packet channel occupation rate surpasses certain setting, such as such shown in Fig. 4 (B), reduce the diffuse code number of distributing to the reservation grouping, and increase the diffuse code number of distributing to packet, can improve transmission efficiency whereby.

By Fig. 4 (B) as seen, (m＜k) is individual have been distributed to packet and has transmitted usefulness to take out m among reservation grouping transmits with diffuse code.

That is to say, the diffuse code Code (k-m+1) that distributes to reservation grouping is taken packet to Codek come usefulness, to improve transmission efficiency.

Fig. 5 sends the possibility probability and preengages the illustration figure that grouping can be used the distribution control of diffuse code number about the reservation grouping.

At this, the transverse axis of each channel and the longitudinal axis be express time and power respectively, with high speed diffuse code sequence information symbol is carried out bandwidth expansion, and with diffuse code Code1 ..., CodeN and time slot TS1 ..., TSM transmits this diffusion signal of having been expanded by bandwidth.At this moment, certain specific diffuse code is distributed to the reservation grouping and transmit usefulness.

Usually, such as shown in Fig. 5 (A), diffuse code Code1 to Codek is assigned to the reservation grouping and transmits and use.In addition, usually, terminal may Probability p (0＜p＜=1) send the reservation grouping with a certain transmission when request call.

At this, though when the data packet channel occupation rate is crossed certain setting, for avoiding preengaging packet collisions, for example (,) shown in Fig. 5 (B) like that, at first may probability be reduced to q (0＜q＜p) sending.

However, when the data packet channel occupation rate still surpassed setting, then the diffuse code number of distributing to the reservation grouping was reduced in that ocean shown in Fig. 5 (C), and increases the diffuse code number of distributing to packet, improves transmission efficiency whereby.

By Fig. 5 (C) as seen, (m＜k) is individual to have distributed to packet to take out m among reservation grouping transmits with diffuse code.

That is to say, the diffuse code Code (k-m+1) that distributes to reservation grouping to Codek take packet come with, to improve transmission efficiency.

Fig. 6 sends the possibility probability and preengages another illustration figure that grouping can be used the distribution control of diffuse code number about the reservation grouping.

Usually, such as shown in Fig. 6 (A), diffuse code Code1 to Codek is assigned to the reservation grouping in advance and transmits usefulness, and in addition, terminal may Probability p (0＜P＜=1) send the reservation grouping with a certain transmission when request call usually.

At this, when the data packet channel occupation rate surpassed certain setting, just reducing distributes gave the diffuse code number of reservation grouping, and increases the diffuse code number of distributing to packet.By Fig. 6 (B) as seen, (m＜k) is individual to have distributed to packet to take out m among reservation grouping transmits with diffuse code.

However.When the data packet channel occupation rate still surpasses setting, then as Fig. 6 (C) shown in, be reduced to q (o＜q＜p) sending possible probability like that.

In view of the above, can lower reservation packet collisions probability, improve transmission efficiency.

Fig. 7 is the descending announcement channel structure example diagrammatic sketch of the 1st embodiment according to the present invention.At this, the transverse axis express time of channel.In announcement channel, may insert with time division type as the reservation grouping by probabilistic information using diffuse code number and reservation grouping to send.Channel can diffuse code and time slot come specific.

Fig. 8 be according to the 1st embodiment the bandwidth expansion is carried out in reservation grouping and packet the time used diffuse code the illustration figure in cycle.

At this, reservation grouping and packet all use the short period diffuse code to carry out the bandwidth expansion.

Fig. 9 be according to the 1st embodiment the bandwidth expansion is carried out in reservation grouping and packet the time used diffuse code another illustration figure in cycle.

At this, reservation grouping with the short period packet carry out bandwidth with the long period diffuse code and expand.

Single carrier/DS-CDMA upstream packet transfer approach by the 1st embodiment.In transmitting, grouping provides by Figure 10 about preengaging grouping and the 1st multiplexing form of packet.

Figure 10 (A) has shown channel architecture, and the state when Figure 10 (B) expression is permanent, Figure 10 (C) have shown that practiced reservation grouping sent the control of possibility probability when the data packet channel occupation rate surpassed setting.

According to example shown in Figure 10, it adopts Packet Multiplexing processing mode shown in Figure 1 and descending announcement channel structure shown in Figure 7, carrying out reservation grouping transmission shown in Figure 3 may probability control.

In the 1st form of the 1st embodiment, certain particular time-slot is distributed to the reservation grouping transmit usefulness.Terminal is being in reservation grouping transmission and may Probability p (0＜p＜=1) sending under the situation of signal, base station detects the channel occupation rate of data grouping, when its value surpasses certain setting, base station is then accused the mode that channel inserts with time division multiplexing downwards and is sent an instruction by working, may probability be reduced to the q (control of 0＜q＜p) to carry out sending.

By the 1st embodiment about single carrier/DS-CDMA upstream packet transfer approach.In transmitting, grouping provides by Figure 11 about preengaging grouping and the 2nd multiplexing form of packet.

Figure 11 (A) has shown channel architecture, and the state when Figure 11 (B) expression is permanent, Figure 11 (C) have shown that practiced reservation grouping sent the control of possibility probability when the data packet channel occupation rate surpassed setting.

According to example shown in Figure 11, it adopts Packet Multiplexing processing mode shown in Figure 2 and descending announcement channel structure shown in Figure 7, carries out reservation grouping shown in Figure 3 and sends and may control by probability.

In the 2nd form of the 1st embodiment, certain specific diffuse code is distributed to the reservation grouping transmit usefulness.Terminal is being in reservation grouping transmission and may Probability p (0＜P＜=1) sending under the situation of signal, base station detects the channel occupation rate of data grouping, when its value surpasses certain setting, base station is then accused the mode that channel inserts with time division multiplexing downwards and is sent an instruction by working, may probability be reduced to the q (control of 0＜q＜p) to carry out sending.

By the 1st embodiment about single carrier/DS-CDMA upstream packet transfer approach, relevant reservation is divided into groups and the 3rd multiplexing form of packet is provided by Figure 12 in grouping transmits.

Figure 12 (A) has shown channel architecture, the state when Figure 12 (B) expression is permanent; Figure 12 (C) has shown the practiced control of distributing to the diffuse code number of reservation grouping transmission usefulness when the data packet channel occupation rate surpasses setting.

According to example shown in Figure 12, it adopts Packet Multiplexing processing mode shown in Figure 2 and descending announcement channel structure shown in Figure 7, carries out the distribution control that can use the diffuse code number about the reservation grouping shown in Figure 4.

In the 3rd form of the 1st embodiment, certain specific diffuse code is distributed to the reservation grouping transmit usefulness.There is k diffuse code to be assigned under the reservation grouping situation, base station detects the channel occupation rate of data grouping, when its value surpasses certain setting, base station is then accused the mode that channel inserts with time division multiplexing downwards and is sent an instruction by working, to carry out distributing to diffuse code decreased number that the reservation grouping transmits usefulness to the k-m (control of 0＜m＜k).

By the 1st embodiment about single carrier/DS-CDMA upstream packet transfer approach, relevant reservation is divided into groups and the 4th multiplexing form of packet is provided by Figure 13 in grouping transmits.

Figure 13 (A) has shown channel architecture, the state when Figure 13 (B) expression is permanent.Figure 13 (C) has shown that practiced reservation grouping sent and may control by probability when the data packet channel occupation rate surpassed setting.Shown in Figure 13 (D) be: although carried out that the reservation grouping sends may probability control and the data packet channel occupation rate still surpasses under the situation of setting, carry out the distribution control that the reservation grouping transmits the diffuse code number of usefulness.

According to example shown in Figure 13, it adopts Packet Multiplexing processing mode shown in Figure 2 and descending announcement channel structure shown in Figure 7, carries out reservation grouping shown in Figure 5 and sends and may control and preengage the distribution control that grouping can be used the diffuse code number by probability.

In the 4th form of the 1st embodiment, certain specific diffuse code is distributed to the reservation grouping transmit usefulness.Terminal with reservation grouping send out may Probability p (0＜p＜=1) and k reservation grouping transmission send under the situation of signal with diffuse code, base station detects the channel occupation rate of data grouping, when its value surpasses certain setting, base station is then accused the mode that channel inserts with time division multiplexing downwards and is sent an instruction by working, may probability be reduced to the q (control of 0＜q＜p) to carry out sending.

After aforesaid operations, when the channel occupation rate of packet still surpassed certain setting, base station was then accused mode that channel inserts with time division multiplexing downwards and is sent an instruction, to carry out the reservation grouping is transmitted with the diffuse code decreased number to the k-m (control of 0＜m＜k) by working.

By the 1st embodiment about single carrier/DS-CDMA upstream packet transfer approach, relevant reservation is divided into groups and the 5th multiplexing form of packet is provided by Figure 14 in grouping transmits.

Figure 14 (A) has shown channel architecture, and the state when Figure 14 (B) expression is permanent, Figure 14 (C) have shown that practiced reservation grouping transmitted the distribution control of using the diffuse code number when data staging channel occupation rate surpassed setting.What Figure 14 (D) showed is: although transmit control with the diffuse code number for the reservation grouping having carried out grouping, and the data packet channel occupation rate still surpasses under the situation of setting, and carrying out that the reservation grouping sends may probability control.

According to example shown in Figure 14, it adopts Packet Multiplexing processing mode shown in Figure 2 and descending announcement channel structure shown in Figure 7, implementation reservation grouping shown in Figure 6 to send and may control and preengage the distribution control that grouping can be used the diffuse code number by probability.

In the 5th form of the 1st embodiment, certain specific diffuse code is distributed to the reservation grouping transmit usefulness.Send and rate p (0＜p＜=1) and k reservation grouping transmission may be sent under the situation of signal with diffuse code to preengage grouping in terminal, base station detects the channel occupation rate of data grouping, when its value surpasses certain setting, base station then accuse by working downwards mode that channel inserts with time division multiplexing send an instruction, to carry out distributing to diffuse code decreased number that the reservation grouping transmits usefulness to the k-m (control of 0＜m＜k).After aforesaid operations, when the channel occupation rate of packet still surpasses certain setting, base station is then accused the mode that channel inserts with time division multiplexing downwards and is sent an instruction by working, may probability be reduced to the q (control of 0＜q＜p) to carry out the reservation grouping sent.

What must any be described is: the present invention the 1st embodiment is not only applicable to upstream packet and transmits, and is applicable to that downlink grouped transmits yet.

In addition, about the 1st embodiment, after base station has been selected reservation grouping and can be used the number of diffuse code, carry out specific to be notified to portable terminal as the reservation grouped channels to diffuse code number or diffuse code.

The following describes the 2nd embodiment of the present invention.

The present invention the 2nd embodiment is the embodiment about the up link of multicarrier/DS-CDMA mobile communication system.

Figure 15 is the illustration figure of the channel architecture between travelling carriage (MS) and the base station (BS) under multicarrier/DS-CDMA mode.

Service band is divided into the individual subcarrier f1 to fn of n (n is the natural number greater than 2).In addition, use these subcarriers f1 to fn with time division way.Therefore, (be to divide at regular intervals, frame length is made as T each subcarrier to be established frame _F, and this frame all is common at all subcarriers).Further, this frame is being marked off F (F is the natural number more than 2) time slot TS1 to TSF (long TS=T of time slot again on the time shaft _F/ F).

Therefore, in all subcarriers, co-existing in F * n time slot in the frame.

Travelling carriage just transmits grouping according to the sequential of this time slot.In addition, in same time slot, grouping is spread with different diffuse codes, promptly carry out multiplexing process in sign indicating number branch (CDMA) mode.

So according to channel architecture shown in Figure 15, the grouping number that can transmit simultaneously equals F * n * diffuse code multiplicity.

In the example shown in Figure 15, in the time slot TS1 of subcarrier f1 with the CDMA mode multiplexing 3 groupings.

Figure 16 is travelling carriage transmits the control of being carried out when the grouping between the two to base station action illustration figure.

At first, travelling carriage transmits the reserve requests grouping, distributes time slot and diffuse code (S101) to ask it that grouping is transmitted to base station.At the request for allocation of travelling carriage, base station distributes (S102) with regard to the time slot and the diffuse code of relevant communication channel, and allocation result is notified to travelling carriage (S103).

So travelling carriage utilizes base station institute's distributed time slot and with the diffuse code that is assigned with grouping is spread and to transmit it (S104).

So the travelling carriage that only has been assigned with time slot and diffuse code can transmit grouping to be assigned with the diffuse code diffusion in assigned slot,

Assigned slot or diffuse code are many more, and the grouping that can transmit simultaneously is just many more, and conveying capacity is also just big more.

Even if under the situation that only has been assigned with a time slot or a diffuse code, as long as travelling carriage preferentially uses assigned slot and diffuse code to come periodically all to send out transmitting information also solidly, also can send out the very big grouping of conveying capacity.

Figure 17 also is travelling carriage transmits the control of being carried out when the grouping between the two to base station action illustration figure.

Travelling carriage utilizes randomly that certain time slot transmits grouping (S111) on the communication channel.

At this,, transmit (S112:YES) with regard to end of packet if grouping transmits successfully.If the words (S112:NO) of failure then travelling carriage utilize randomly once more that certain time slot transmits grouping (S111) on the channel.

As seen, travelling carriage does not distribute time slot to the base station request, and certain time slot transmits grouping on the communication channel but utilize randomly.This mode is suitable for the fewer signal of base station grouping transmission conveying capacity between travelling carriage.

Figure 18 is the action illustration figure that how much changes the control of being carried out between the travelling carriage and base station when the transmission speed corresponding to the amount of phoresying that travelling carriage will transmit grouping.

At first, travelling carriage transmits the reserve requests grouping to base station, distributes time slot and diffuse code to ask it, meanwhile also reports conveying capacity size (S120).

Base station distributes time slot and the diffuse code that is adapted to the travelling carriage conveying capacity according to the request for allocation and the conveying capacity information thereof of travelling carriage on communication channel, and allocation result is notified to travelling carriage (S121).

So travelling carriage divides into groups to transmit (S122) according to this result

So bigger if travelling carriage transmits the conveying capacity of grouping, base station just distributes time slot (for example plural time slot) and the diffuse code (for example plural diffuse code, the smaller diffuse code of diffusivity) of being convenient to transmit big conveying capacity; And if the travelling carriage conveying capacity of need when smaller, base station just distributes suitable time slot and diffuse code.

Therefore, base station is suitably to distribute time slot and diffuse code corresponding to the travelling carriage conveying capacity.

And on the other hand, travelling carriage can obtain to be suitable for the transfer rate of conveying capacity.

What below will illustrate is: when travelling carriage when base station transmits the reserve requests grouping, base station is how to distribute the reserve requests grouping to transmit with time slot and diffuse code.

As shown in figure 15, travelling carriage can equal F * n * diffuse code multiplicity to the grouping number that base station transmits simultaneously.

So, in the present invention, (F * n * diffuse code multiplicity) in the middle of individual several are used for the reserve requests grouping transmit.

For example shown in Figure 19, in the middle of existing F * n time slot, base station can at random distribute k1, and (k1 is a natural number, k1≤F * n) do the reserve requests grouping to transmit time slot in the frame.So travelling carriage is waited to ask grouping to transmit time slot in this reservation and is transmitted the reserve requests grouping with some diffusion the among the previously selected m1 of base station (m1 is a natural number, m1≤operable diffuse code sum) diffuse code.

In Figure 19, the time slot TS2 of the time slot TS1 of subcarrier f1, the time slot TS1 of subcarrier f2, subcarrier f3 etc. is assigned to the reserve requests grouping and transmits time slot.

Figure 20 is assigned as the time slot TS1 of each frame the reserve requests grouping to transmit channel architecture illustration figure under the situation of time slot (k1=n) in all subcarriers.

Illustrated in Figure 20 is: in all subcarrier f1 to fn time slot TS1 is assigned as the reserve requests grouping and transmits time slot.

Illustrated in Figure 21 is: have only the time slot TS1 of part subcarrier to be assigned to the reserve requests grouping in all subcarriers and transmit time slot (k1＜n).As for the selected mode of k1 time slot, both can distribute continuously along subcarrier, also can distribute discretely.

In Figure 21, the time slot TS1 of subcarrier f3 is not assigned to reserve requests and transmits time slot.

Figure 22 is assigned as reserve requests grouping to all time slots in the subcarrier to transmit channel architecture illustration figure under the situation of time slot (k1=F).In addition, setting subcarrier that reserve requests transmits time slot has more than 2 and also can.

In Figure 22, all time slots of subcarrier f1 all are assigned to reserve requests and transmit time slot.

Figure 23 is to be a part of time slot allocation in the subcarrier that reserve requests grouping transmits time slot (the channel architecture illustration figure under the situation of k1＜F).As for the selected mode of k1 time slot, both can also can distribute time slot discretely continuously.

In Figure 23, time slots such as the TS1 of subcarrier f1, TS2, TS4 are assigned to reserve requests and transmit time slot.

The reserve requests grouping number of travelling carriage is too much at the appointed time, tends to occur the situation that reserve requests can not get replying.To this, can divide into groups transmission with number of time slot and diffuse code number corresponding to reserve requests grouping number change reserve requests.

Figure 24 be base station corresponding to the stipulated time in the reserve requests grouping number change reserve requests grouping of travelling carriage transmit number of time slot k1 (k1 be natural number k1≤F * n) when the illustration figure of control that base station is carried out.

Base station detects (S130) to the reserve requests grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the reserve requests grouping number surpasses certain threshold value (S131:YES), just increase the reserve requests grouping and transmit number of time slot, and time slot position is notified to travelling carriage (S133).

And, when the reserve requests grouping number is lower than certain threshold value (S132:YES), then reduce the reserve requests grouping to transmit number of time slot, and time slot position is notified to travelling carriage (S134) according to testing result.

Ask grouping number both not surpass certain threshold value (SI31:NO) approximately when issuing, also be not less than certain threshold value SI32:NO) time, do not change the reserve requests grouping and transmit number of time slot.

The reserve requests grouping that travelling carriage is notified by base station transmits time slot position and transmits the reserve requests grouping.

Figure 25 be base station corresponding to the stipulated time in the reserve requests grouping number change reserve requests grouping of travelling carriage transmit with diffuse code number m1 (m1 is a natural number, m1≤can use the diffuse code sum) when the illustration figure of control that base station is carried out.

Base station detects (S140) to the reserve requests grouping number that travelling carriage sends within a certain period of time.

According to testing result.When the reserve requests grouping number surpasses certain threshold value (S141:YES), just increase the diffuse code number m1 that is used to spread the reserve requests grouping, and give travelling carriage (S143) its type notification.

And, when the reserve requests grouping number is lower than certain threshold value (S142:YES), just reduce the diffuse code number m1 that is used to spread the reserve requests grouping, and give travelling carriage (S144) its type notification according to testing result.

When the reserve requests grouping number had not both surpassed certain threshold value (S141:NO), also has been not less than certain threshold value S142:NO) time, the diffuse code number that is used to spread the reserve requests grouping do not changed.

The diffusion reserve requests grouping that travelling carriage is notified from base station transmits with selecting one among the diffuse code spreads the grouping of transmission reserve requests.

Figure 26 be base station corresponding to the stipulated time in the reserve requests grouping number change reserve requests grouping of travelling carriage transmit number of time slot k1 (k1 be a natural number, k1≤F * n) and reserve requests grouping transmit the illustration figure with control that base station is carried out when the diffuse code number m1 (m1 is a natural number, m1≤can use the diffuse code sum).

Base station detects (S150) to the reserve requests grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the reserve requests grouping number surpasses certain threshold value (S151:YES), just carry out " the diffuse code number m1 that increase is used to spread the reserve requests grouping ", perhaps " increase the reserve requests grouping and transmit number of time slot k1 " or " both's increase ", and this information is notified to travelling carriage (S153).

And according to testing result, when the reserve requests grouping number is lower than certain threshold value (S152:YES), just carry out " the diffuse code number m1 that minimizing is used to spread the reserve requests grouping " or " reduce the reserve requests grouping and transmit number of time slot k1 " or " both's minimizing ", and this information is notified to travelling carriage (S154).

When the reserve requests grouping number had not both surpassed certain threshold value (S151:No), when being not less than certain threshold value (S152:NO), just " being used to spread the diffuse code number of reserve requests grouping " and " the reserve requests grouping transmits number of time slot " do not changed yet.

The reserve requests grouping that travelling carriage is notified from base station transmit time slot position and the grouping of diffusion reserve requests transmit with among the diffuse code selected one spread and transmit reserve requests and divide into groups.

The words of reserve requests grouping number more than, the situation of reserve requests grouping may appear positively transmitting, divide into groups to be limited (for example limiting the reserve requests grouping in time transmits) so base station just should transmit reserve requests to travelling carriage, travelling carriage then will be obeyed this restriction and be carried out reserve requests grouping transmission.Figure 27 is exactly the illustration figure of control that base station is carried out in this case.

Base station detects (S160) to the reserve requests grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the reserve requests grouping number surpasses certain threshold value (S161:YES), just grouping transmits restriction and makes the regulation stricter than present situation to reserve requests, and this is notified to travelling carriage (S163).

And according to testing result, when the reserve requests grouping number is lower than certain threshold value (S162:YES), just grouping transmits restriction and makes the regulation looser than present situation to reserve requests, and this is notified to travelling carriage (S164).

When the reserve requests grouping number had not both surpassed certain threshold value (S161:NO), also be not less than certain threshold value SI62:NO) time, just do not change transmitting restriction.

Base station distributes k2, and (k2 is a natural number, k2≤F * n) time slot can the random process grouping transmit time slot as travelling carriage, can random process grouping diffusion diffuse code but also distribute the individual diffuse code of m2 (m2 is a natural number, m2≤can use the diffuse code sum) to regard.

Travelling carriage spreads with a diffuse code that is assigned with at the time slot that is assigned with and transmits the random process grouping.

As shown in figure 28, (k2 is a natural number, k2≤F * n) do the random process grouping to transmit time slot to distribute k2 among F * n the time slot that base station exists in the frame arbitrarily.So travelling carriage transmits time slot to spread the random process grouping by one among the individual diffuse code of the previously selected m2 of base station (m2 is a natural number, m2≤can use the diffuse code sum) in this random process grouping.

In Figure 28, the time slot TF2 of the time slot TS1 of subcarrier f1, the time slot TS1 of subcarrier f2, subcarrier f3 etc. is assigned to the random process grouping and transmits time slot.

Jail 29 is the time slot TS1 of each frame to be assigned as the random process grouping in all subcarriers to transmit channel architecture illustration figure under the situation of time slot (k2=n).

In Figure 29, the time slot TS1 of all subcarriers is assigned as the random process grouping and transmits time slot.

Illustrated in Figure 30 is: the time slot TS1 of each frame is assigned to random process grouping and transmits time slot (k2＜n) in a part of subcarrier.As for the selected mode of k2 time slot, both can distribute continuously, also can distribute discretely along subcarrier.

In Figure 30, the time slot TS1 of subcarrier f3 is not assigned to the random process grouping and transmits time slot.

Figure 31 is assigned as random process grouping to all time slots in the subcarrier to transmit the logical structure example diagrammatic sketch of letter under the situation of time slot (k2=F).

In Figure 31, all time slots of subcarrier f1 all are assigned to the random process grouping and transmit time slot.

Figure 32 is to be a part of time slot allocation in the subcarrier that random process grouping transmits time slot (the channel architecture illustration figure under the situation of k2＜F).

In Figure 32, time slots such as the TS1 of subcarrier f1, TS2, TS4 are assigned to the random process grouping and transmit time slot.

As for the selected mode of k2 time slot, both can be continuously, also can distribute time slot discretely.

The random process grouping number of travelling carriage is too much at the appointed time, the situation of communicating by letter and can not carry out will occur.To this, can transmit number of time slot and diffuse code number corresponding to the grouping of random process grouping number change random process.

Figure 33 be base station corresponding to the stipulated time in the random process grouping number change random process grouping of travelling carriage transmit number of time slot k2 (k2 be a natural number, the illustration figure of control that base station is carried out when k2≤F * n).

Base station detects (S230) to the random process grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the random process grouping number surpasses certain threshold value (S231:YES), just increase the random process grouping and transmit number of time slot, and time slot position is notified to travelling carriage (S233).

And, when the random process grouping number is lower than certain threshold value (S232:YES), then reduce the random process grouping to transmit number of time slot, and time slot position is notified to travelling carriage (S234) according to testing result.

When the random process grouping number had not both surpassed certain threshold value (S231:NO), when being not less than certain threshold value (S232:NO) yet, not changing the random process grouping and transmit number of time slot.

The random process grouping that travelling carriage is notified by base station transmits time slot position and transmits the random process grouping.

Figure 34 be base station corresponding to the stipulated time in the random process grouping number change random process grouping of travelling carriage transmit with diffuse code number m2 (m2 is a natural number, m2≤can use the diffuse code sum) when the illustration figure of control that base station is carried out.

Base station detects (S240) to the random process grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the random process grouping number surpasses certain threshold value (S241:YES), just increase the diffuse code number m2 that is used to spread the random process grouping, and give travelling carriage (S243) its type notification.

And according to testing result, (S242:YES) just reduces the diffuse code number m2 that is used to spread the random process grouping when the random process grouping number is lower than certain threshold value, and gives travelling carriage (S244) its type notification.

When the random process grouping number had not both surpassed certain threshold value (S241:NO), also has been not less than certain threshold value S242:NO) time, the diffuse code number that is used to spread the random process grouping do not changed.

The diffusion random process grouping that travelling carriage is notified from base station transmits with selecting one among the diffuse code spreads the grouping of transmission random process.

Figure 35 be base station corresponding to the stipulated time in the random process grouping number change random process grouping of travelling carriage transmit number of time slot k2 (k2 is a natural number, and k2≤F * n) and random process grouping transmit rescues order m2 (m2 is natural number, m2≤can use the diffuse code sum) with diffuse code) when the illustration figure of control that base station is carried out.

Base station detects (S250) to the random process grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the random process grouping number surpasses certain threshold value (S251:YES), just carry out " the diffuse code number m2 that increase is used to spread the random process grouping " or " increase the random process grouping and transmit number of time slot k2 " or " both's increase ", and this information is notified to travelling carriage (S253).

And according to testing result, when the random process grouping number is lower than certain threshold value (S252:YES), just carry out " the diffuse code number m2 that minimizing is used to spread the random process grouping " or " reduce the random process grouping and transmit number of time slot k2 " or " both's minimizing ", and this information is notified to travelling carriage (S254).

When the random process grouping number had not both surpassed certain threshold value (S251:NO), when being not less than certain threshold value (S251:NO), just " being used to spread the diffuse code number of random process grouping " and " the random process grouping transmits number of time slot " do not changed yet.

The random process grouping that travelling carriage is notified from base station transmit time slot position and the grouping of diffusion random process transmit with among the diffuse code selected one spread and transmit random process and divide into groups.

The words of random process grouping number more than, the situation of random process grouping may appear positively transmitting, divide into groups to be limited (for example limiting the random process grouping in time transmits) so base station just should transmit random process to travelling carriage, travelling carriage then will be obeyed this restriction and be carried out random process grouping transmission.Figure 36 is exactly the illustration figure of control that base station is carried out in this case.Base station detects (S260) to the random process grouping number that travelling carriage sends within a certain period of time.

According to testing result, when the random process grouping number surpasses certain threshold value (S261:YES), just transmit the restriction work regulation stricter, and this is notified to travelling carriage (S263) than present situation to locating the journey grouping at random.

And according to testing result, when the random process grouping number is lower than certain threshold value (S262:YES), just grouping transmits restriction and makes the regulation looser than present situation to random process, and this is notified to travelling carriage (S264).

When the random process grouping number both also is not less than certain thresholding (S262:NO) above certain threshold value (S261:NO), just do not change transmitting restriction.

In the present invention the 22nd embodiment, be to transmit the conveying capacity size of dividing into groups corresponding to travelling carriage to change the travelling carriage transfer rate.Below just the form corresponding to conveying capacity change transfer rate is explained.

This form that Figure 37 has been an illustration.At this, the transfer rate of the platform 2 that relatively moves, travelling carriage 1 utilizes p diffuse code that multiplexing process is carried out in grouping and makes transfer rate increase to p doubly.

Figure 38 is that thereby base station distributes the diffuse code of different diffusivitys to carry out the variable illustration figure of transfer rate corresponding to travelling carriage conveying capacity size to travelling carriage in time slot TS of communication channel.

Shownly in Figure 38 be: the used diffuse code of grouping of the platform 2 that relatively moves is that 1/SF diffuse code doubly spreads with the diffusivity to the grouping of travelling carriage 1, thereby makes SF that the transfer rate of travelling carriage 1 reaches travelling carriage 2 doubly (it is certain to cut general rate).

Figure 39 is that base station distributes q corresponding to travelling carriage conveying capacity size arbitrarily to travelling carriage (thereby q is a nature with regard to q≤F * n) individual time slot is carried out the variable illustration figure of transfer rate in communication channel one frame.

Figure 40,41,42 and 43 is base stations corresponding to travelling carriage conveying capacity size to both change the key diagram of the example of distribution at least among the diffuse code of diffuse code number p, different diffusivitys and the number of time slot q three.

According to Figure 40, on Figure 38 basis, further travelling carriage 1 is distributed p diffuse code, the diffusivity of this p diffuse code is 1/SF a times of travelling carriage 2 diffuse code diffusivitys, whereby, travelling carriage 1 transfer rate is set at P * SF times of travelling carriage 2.

According to Figure 41, on Figure 39 basis, further, whereby, travelling carriage 1 transfer rate is set at p * q times of travelling carriage 2 to P diffuse code of each time slot allocation of travelling carriage 1.

Example shown in Figure 42 is: travelling carriage 1 is distributed have the 1/SF diffuse code doubly that diffusivity is the diffusivity of travelling carriage 2 diffuse codes, but also distribute q time slot doubly, whereby, travelling carriage 1 transfer rate is set at q * SF times of travelling carriage 2.

So example shown in Figure 43: it is the time slot doubly of travelling carriage 2 that travelling carriage 1 is distributed, further to p diffuse code of each time slot allocation of travelling carriage 1, the diffusivity of this p diffuse code is 1/SF a times of travelling carriage 2 diffuse code diffusivitys, whereby, the p * q * SF that travelling carriage 1 transfer rate is set at travelling carriage 2 doubly.

Next the 3rd embodiment of the present invention once is described again.

The 3rd embodiment is the embodiment about multicarrier/DS-CDMA mobile telecommunication system down link.

Channel architecture with the present invention the 3rd embodiment for example has structure shown in Figure 44 to the base station that each user sends information.This base station adopts multicarrier/DS-CDMA processing mode.

Comprise that according to this base station of Figure 44 centralized control channel generation unit 11, subscriber channel generation unit 12 (#1) are to 12 (#m), multiplexing process unit 13, multi-carrier modulation unit 14 and transmitting element 15.Centralized control channel generation unit 11 carries out the control information symbol to each user the bandwidth expansion, generates the diffusion signal corresponding to this control information symbol with specific diffuse code sequence.Each subscriber channel generation unit 12 (#1) to 12 (#m) the information symbol that will send to each user is carried out the bandwidth expansion, generates the diffusion signal corresponding to this information symbol corresponding to each user's diffuse code sequence.

13 pairs of multiplexing process unit synthesize from the diffusion signal corresponding to information symbol of each subscriber channel generation unit 12 (#1) to 12 (#m), thereafter, according to the regulation multiplex mode, with this synthetic gained signal with carry out multiplexing process from the diffusion signal corresponding to the control information symbol of said centralized control channel generation unit 11.Can set arbitrarily as for multiplex mode, for example, can adopt following any or see several combined forms: with the certain hour be the time division multiplexing of inserting information the cycle, to certain certain subcarriers insert information frequency division multiplexing, utilize the multiplexing code division multiplexing of particular code etc.

The 14 pairs of multiplexed signalss from multiplexing process unit 13 in multi-carrier modulation unit modulate (inverse discrete Fourier transform IDFT), it is dispersed into plural number (n) subcarrier (multicarrier) composition.The signal that contains the plural sub-carrier component that is obtained by multi-carrier modulation unit 14 is transmitted to transmitting element 15 successively, so send to each user (travelling carriage) by this transmitting element 15.The frequency interval of multi-carrier modulation unit 14 used subcarriers is centralized control channel generation unit 11 and subscriber channel generation unit 12 (#1), and (P (p is an arithmetic number) that cuts general rate doubly to the renewal frequency of used each diffuse code sequence of 12 (#m).

The structure of centralized control channel generation unit 11 is for example shown in Figure 45.

According to Figure 45, centralized control channel generation unit 11 is made of send control information generation unit 20 and synthesis unit 60 of up link.Send control information generation unit 20 of up link generates and is used for information that each user (travelling carriage) signal transmitted is controlled, and it comprises transmission power control information generating unit 21 and the 1st send control information generation unit 22 and the 2nd send control information generation unit 23 and channel allocation information generation unit 24 and synthesis unit 25.

Transmission power control information generating unit 21 generates user's transmission power control instruction of carrying out up-link transmit power control.The 1st sends control information frequency, code number, time slot, random process that generation unit 22 distributes to random process grouping according to generations such as traffic informations are sent out into control informations such as permission probability.The 2nd sends to system information generating unit 23 distributes to control informations such as frequency that reserve requests divides into groups, code number, time slot, transmission permission probability according to generation such as traffic informations.Channel allocation information generation unit 24 generates frequency, code (containing diffusivity), the time slot letter in reply breath of distributing to user's (finger has been received its reserve requests grouping, so sent the user who sends permission to it).The transmission power control instruction of transmission power control information generating unit 21 is because of different different with communications line status between each user (travelling carriage).So its be each user proprietary control information.And the 1st the send control information information of relevant channel allocation of each control information of generation unit 23 and channel allocation information control unit 24 of generation unit 22 and the 2nd that sends control information is public information to each user.

Synthesis unit 25 according to the regulation algorithm to synthesizing from the 1st send control information each information bit of generation unit 23 and channel allocation information control unit 24 of generation unit 22 and second that sends control information.From this synthesis unit 25 gained composite signals by the information that sends as the control up link, by up link generation unit 20 outputs that send control information.Be synthesized unit 60 with other centralized control information and synthesized by the up link control information that generation unit 20 is exported that sends control information, and this composite signal is by as being used to be controlled information that each user sends by 11 outputs of centralized control channel generation unit.

Must be noted that: though according to the above description, omitted and utilized diffuse code to carry out the processing of bandwidth expansion, yet, in handling, the back segment of synthesis unit 60 carries out the bandwidth extension process of utilizing the diffuse code sequence, so above-mentioned control information is exported by centralized control channel generation unit 11 with the diffusion signal form to above-mentioned composite signal.

Centralized control channel generation unit 11 structures also further can be such as shown in figure 46, comprises response message generation unit 30.

Generate the response message that is used for each user's uplink signal transmission according to Figure 46 response message generation unit 30, it comprises user answer information generating unit 31 (1) to 31 (m) and synthesis unit 32 corresponding to each user.Each user answer information generating unit 31 (1) to 31 (m) generates replys instruction ACK or NACK to the upstream packet of relative users.Can become unit 32 relevant each user answer information generating unit 31 (1) to 31 (m) information bit of replying instruction that generates to be synthesized according to the regulation algorithm.

The composite signal of synthesis unit 32 is exported by responder link generation unit 30 by the response message that sends as the signal to up link.So this response message is synthesized unit 60 with other centralized control information (can comprise that also Figure 45 shows by the up link control information that generation unit 20 is exported that sends control information) and is synthesized.

Further, centralized control channel generation unit 11 structures can also be such as shown in figure 47, comprises concentrating advertised information generation unit 40.

According to Figure 47, concentrate advertised information generation unit 40 to comprise temporal information generation unit 41, cell information generation unit 42, traffic information generation unit 43, traffic value breath generation unit 44, broadcast message generation unit 45 and synthesis unit 46.Temporal information generation unit 41 generates the temporal information of expression absolute time.Cell information generation unit 42 generates the information of sub-district (base station) being carried out specific I D information (identifying information), representing this base station position, the information of representing near the relevant base stations such as information of the existing base station of this base station.

Traffic information generation unit 43 generates traffic information according to this cell uplink and downlink communication situation.Transport information generation unit 44 generates this sub-district of expression (base station) transport information of the traffic of road on every side.Broadcast message generation unit 45 generates TV information and peripheral information etc.

Above-mentioned each information generating unit 41,42,43,44,45 may not all synchronously be carried out information and be generated, and can the visual information type generate with the different cycles information of carrying out.

Synthesis unit 46 synthesizes the information bit that at least one generated among each information generating unit 41,42,43,44,45 according to the regulation algorithm.Exported by concentrated advertised information generation unit 40 as concentrated advertised information from these synthesis unit 46 gained composite signals.So this concentrated advertised information is synthesized unit 60 with other centralized control information (also can comprise shown in Figure 45 by up link send control information control information that generation unit 20 is exported and response message that response message generation unit 30 shown in Figure 46 is exported or both one) and is synthesized.

Centralized control channel generation unit 11 can also have for example structure shown in Figure 48.

According to Figure 48, centralized control channel generation unit 11 is made of aiming symbol generation unit 50 and synthesis unit 60.Aiming symbol generation unit 50 generates the public phase place known pilot symbols of all users that is used for channel estimating etc. synchronously.Aiming symbol that aiming symbol generation unit 50 generates is synthesized unit 60 with other centralized control information (also can comprise shown in Figure 45 by the send control information concentrated advertised information three that concentrated advertised information generation unit 40 the generated one at least of control information that generation unit 20 is exported and response message that response message generation unit 30 shown in Figure 46 is exported and Figure 47 of up link) and is synthesized.

The formed down channel structure of base station of the employing multicarrier/DS-CDMA mode of said structure is for example shown in Figure 49.

In example shown in Figure 49, in certain each time frame of time, each of n subcarrier 1 to n all is that the centralized control channel allocation is given a Code Channel, and communication channel is then distributed to plural Code Channel.Each channel of each subcarrier (centralized control channel and communication channel) is distinguished to be used for above-mentioned centralized control channel generation unit 11 and subscriber channel generation unit 12 (#1) to the diffuse code sequence (code) of 12 (#m).

Contain 11 generation information of centralized control channel generation unit in the centralized control channel, for example can comprise following any or several combined information: aiming symbol (aiming symbol generation unit 50 generates), the control information that the control uplink signal sends (being generated) by the up link generation unit 20 that sends control information, to the response message (response message generation unit 30 generates) that uplink signal sends, concentrate advertised information (concentrating advertised information generation unit 40 to generate) etc.

As for each communication channel, the information (transmission data) that is used to provide and deliver and will sends to the user, each subscriber channel generation unit 12 (#1) to the information that 12 (#m) are generated is contained in respectively in the corresponding communication channel.

In addition, can be to each user respectively with regard to one or a plurality of sub-carrier allocation communication channel.

According to above-mentioned down channel structure, about in the centralized control channel of each subcarrier, containing those information, whether should contain information in the common signal channel of all subcarriers in other words, can set arbitrarily.

Below, according to Figure 50 another down channel structure is done explanation down again.It is the same with example shown in Figure 49, and in each time frame, each of n subcarrier 1 to n all is to have a centralized control channel allocation to give a Code Channel, and simultaneously, communication channel is then distributed to plural Code Channel.

In the example shown in Figure 50, the information except that aiming symbol (uplink control information, uplink acknowledgements information, advertised information) is contained in the centralized control channel of certain subcarriers (such as subcarrier 1).Aiming symbol then both can be contained in and also can be contained in several in the centralized control channel of all subcarriers mutually in the centralized control channel of the discrete subcarrier of opening.

Shown in Figure 51 in the example, change the subcarrier that the centralized control channel that contains this information is assigned with corresponding to information type.For example, in the centralized control channel that uplink control information is contained in the centralized control channel of subcarrier 1, up chain road response message is contained in subcarrier 2, advertised information is contained in the centralized control channel of subcarrier n, about aiming symbol, this example is also the same with example shown in Figure 50.Promptly wherein both can be contained in and also can be contained in dried in the centralized control channel of all subcarriers mutually in the centralized control channel of the discrete subcarrier of opening.

Shown in Figure 52 in the example, not all parts of each time frame, but be with at the appointed time in the T, aiming symbol and uplink control information and uplink acknowledgements information and this one of advertised information or combination therebetween are contained in the centralized control channel of each subcarrier.As a result, the information that is contained in the centralized control channel of each subcarrier is periodically sent with same sequential.

In the example, the same shown in Figure 53 with example shown in Figure 52, promptly be not all parts of each time frame, but in the portion of time band, above-mentioned information is contained in the centralized control channel of each subcarrier.Different is: because of subcarrier different time band T1, T2.......Tn also difference.As a result, the information that is contained in the centralized control channel of each subcarrier is periodically sent with different sequential.

Channel architecture according to above-mentioned multicarrier/DS-CDMA mobile telecommunication system down link, when each user sends various information, owing to be that information is contained in the centralized control channel all general concerning all users, so compare information transmitting efficiency height with the situation of utilizing each user's dedicated channel to send information.

Particularly, if each user special information (such as transmission power control information, to each user's response message, channel allocation information etc.) is contained in the centralized control channel, only just can sends the Proprietary Information to plural user, the information of dying transmitting efficiency height with a centralized control channel.

Though, among the 3rd embodiment in each example, to cut out ripple all be to control channel in the Code Channel allocation set with regard to all secondary.But the present invention is not limited to this, also can be to control channel in the plural Code Channel allocation set with regard among the plural subcarrier part or all.

The single carrier of the 1st embodiment according to the present invention/DS-CDMA upstream packet load mode utilizes time frame and diffuse code, can preengage the multiplexing process of grouping and packet efficiently.And, in the 1st embodiment,, can also realize the increase and decrease of the corresponding traffic neatly by reservation grouping and the operable diffuse code number of packet are controlled.

Packet transmission method according to the overloading quilt/DS-CDMA of the present invention the 2nd embodiment, can carry out that time slot reservation type grouping transmits, the grouping of random process type transmits, the grouping of variable transfer rate transmits, so can realize transmitting efficiently the signal of various tool difference conveying capacities.

The 3rd embodiment according to the present invention; In multicarrier/DS-CDMA mobile communication system, by base station when each user (travelling carriage) transmission information, no matter be Proprietary Information or public information to each user can be contained in each subcarrier the centralized control channel in send.So in multicarrier/DS-CDMA mobile communication system, also can send control information to the user effectively even if be under the asymmetric situation of up-downgoing transinformation content.

Claims

1, the down channel structure of multicarrier/DS-CDMA mobile communication system, in this system, with the diffuse code sequence information symbol is carried out the bandwidth expansion, utilizes to have assigned frequency plural subcarrier transmission at interval, it is characterized in that through this bandwidth expansion gained diffusion signal:

The plural communication channel of distributing to plural subcarrier is respectively distinguished by each regulation time frame and is re-used;

The said plural communication channel of distributing to each subcarrier comprises the centralized control channel and the proprietary communication channel of each user of the public use of plural user.

2, by the said down channel structure of claim 1, it is characterized in that: the information that contains the uplink signal transmission that is useful on each user of control in the said centralized control channel.

3, by claim 1 or 2 said down channel structures, it is characterized in that: contain response message in the said centralized control channel user's uplink signal transmission.

4, by each said down channel structure of claim 1 to 3, it is characterized in that: contain concentrated advertised information in the said centralized control channel the user.

5, by each said down channel structure of claim 1 to 4, it is characterized in that: contain each user in the said centralized control channel and separate the used aiming symbol of timing to received signal.

6, by each said down channel structure of claim 1 to 5, it is characterized in that: just a part or all subcarriers, to control channel in or the plural Code Channel allocation set.

7, by each said down channel structure of claim 1 to 6, it is characterized in that: be contained in the information type difference in the centralized control channel of each subcarrier.

8, by each said down channel structure of claim 1 to 7, it is characterized in that: the information in the centralized control channel of distributing to a plurality of subcarriers of being contained at the portion of time band of each time frame by time division multiplexing.

9,, it is characterized in that by the said down channel structure of claim 8: be contained in the information in the centralized control channel of distributing to each subcarrier, concerning each subcarrier, all be at each time frame with same sequential by time division multiplexing.

10, by the said down channel structure of claim 9, it is characterized in that: being contained in the information in the centralized control channel of distributing to each subcarrier, concerning each subcarrier, is respectively by time division multiplexing with different sequential at each time frame.