CN101238682B - The method and apparatus of a kind of method for allocate communications resource and transmission and reception data - Google Patents
The method and apparatus of a kind of method for allocate communications resource and transmission and reception data Download PDFInfo
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- CN101238682B CN101238682B CN200680028736.3A CN200680028736A CN101238682B CN 101238682 B CN101238682 B CN 101238682B CN 200680028736 A CN200680028736 A CN 200680028736A CN 101238682 B CN101238682 B CN 101238682B
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- 238000004891 communication Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 75
- 230000005540 biological transmission Effects 0.000 title claims description 56
- 230000002085 persistent effect Effects 0.000 claims description 29
- 238000013468 resource allocation Methods 0.000 claims description 17
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 28
- 238000012546 transfer Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0087—Timing of allocation when data requirements change
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/50—Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
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Abstract
Provide and use virtual circuit to exchange the method and apparatus of (VCS) with new departure, for distributing by combinational circuit exchange (CS) and packet switching (PS) and use resource, in this method and apparatus, the resource of the dedicated channel using CS is distributed in base station to user, then transmit data on the dedicated channels.When not transmitting data to user, the dedicated channel resource that the Resourse Distribute that base station is shared channel distributes also transmits the data of different user.Therefore, being sensitive in the wireless communication system of little traffic business of time of delay for frequently transmitting, can power system capacity being increased and minimize the waste of the communication resource.
Description
Technical field
The present invention relates generally to the method and apparatus for allocate communications resource in a wireless communication system.More particularly, the present invention relates to the method and apparatus for using circuit switching and packet switching to carry out effectively to distribute in a wireless communication system and use the communication resource, and for using the method and equipment to transmit in the mobile stations and receiving the method for data.
Background technology
Routinely, the communication resource allocation scheme used in a wireless communication system is divided into circuit switching (CircuitSwitching, CS) and packet switching (PacketSwitching, PS) two class scheme.In CS scheme, to the Radio Resource of specific users allocation fixed amount, namely dedicated channel (dedicatedchannel), and use dedicated channel transmission and receive data.
Fig. 1 is that diagram is for using conventional CS scheme to transmit the flow chart of the process of data.With reference to Fig. 1 describe briefly for assigned with dedicated channel, the example of conventional CS scheme that uses in the conveyer of base station (BS).
In the step 101 of Fig. 1, the conveyer of BS is used for allocate communications resource and carrys out assigned with dedicated channel by performing to the dispatch deal of the specific user linked by radio communication net.In the typical case of step 101, in the wireless communication system of employing code division multiple access (CDMA), be used for the specific Walsh code of identification channel to specific users allocation.In another example, use OFDM (OFDMA) wireless communication system in specific users allocation certain subcarriers resource.
In order to assigned with dedicated channel, in call setup or transfer (handoff) process, usually perform the operation be used for the specific Walsh code of specific users allocation or certain subcarriers resource.In FIG, step 103,105 and 107 is while a call of the particular user for transmitting the process of data in the dedicated channel of distributing.That is, in step 103, the conveyer of BS determines whether there is the data that will be sent to the user (hereinafter referred to as CS user) connected by CS, in the transmission interval be associated in step 101 for described user's assigned with dedicated channel.Here, delivery time interval (TTI) or frame that interval refers to the time quantum of the data as transmission one grouping is transmitted.
If as the determination result of step 103, occur the data that will be sent to the CS user be associated in this transmission interval, then in step 105, the conveyer of BS transmits data in the dedicated channel of distributing to CS user.But if as the determination result of step 103, there are not the data that will be sent to the CS user be associated in this transmission interval, then the conveyer of BS proceeds to step 105 and transmits interval to move to next.Then, in step 103, the conveyer of BS determines whether there is the data that will be sent to the CS user be associated again.Repeat described process until end call.There is a problem in the communication resource distribution process in FIG based on CS: when not having to occur being sent to the data of specific CS user in the transmission interval be associated, in identical transmission interval, the dedicated channel distributing to specific user can not distribute to different user.
Fig. 2 is the flow chart of diagram for using conventional PS scheme to transmit data.With reference to Fig. 2 describe briefly for assigned with dedicated channel, the example of conventional CS scheme that uses in the conveyer of base station (BS).
PS scheme adopts the system resource (such as, the Walsh code of cdma system, the subcarrier etc. of OFDMA system) shared, and not to specific users allocation dedicated channel, this is different from CS scheme.That is, use the wireless communication system of PS scheme by determining whether to carry out operation dispatching process to a certain user allocation system resource in each delivery time.In the step 201 of Fig. 2, by internal schedule parts (scheduler) (not shown), the conveyer of BS determines that whether transmitting data to a certain user in this transmission interval carrys out operation dispatching process, then distributes shared channel to the user be associated.According to scheduling result, multiple user can be assigned to shared channel simultaneously.
In the dispatch deal of step 201, a user then transmission data volume of a user (user-by-user) and the traffic required for data transmission is set.In step 203, according to scheduling result, the conveyer of BS does not transmit data on the shared channel distributed to user, but also at the channel control information that the upper transmission of shared control channel (SCCH) is shared, can shared channel be received.Routinely, shared channel control information comprises user identifier (ID), resource information, data-rate information, modulation intelligence, coded message etc.
To user distributing user ID in call setup or hand-over.Mobile radio station (MS) detects user ID from the control channel shared.When multiple users simultaneously receive the shared channel, MS can detect the transmission data of himself in the transmission interval be associated.Resource information transmits the information of the communication resource used.Data-rate information instruction transmits the transfer rate of the data that will transmit in interval at each.The modulation scheme of modulation intelligence instruction for transmitting data, as Quadrature Phase Shift Keying (QPSK), 8-phase shift keying (8PSK) and 16-quadrature amplitude modulation (16QAM) etc.Coded message indicates the coding method and code rate (coderate) that use in transport process.
In step 203 on shared control channel and shared channel after communicating control information and data, in step 205, the conveyer of BS advances to (moveto), and next transmits interval, and repeats described process until end call from step 201.
Above-mentioned CS or PS scheme has the following advantages and shortcoming.
First, the advantage of CS scheme is, because assigned with dedicated channel also transmits data, on the dedicated channels so decrease the control information amount of the data for transmitting.But the shortcoming of CS scheme is, due to when there are not the data that will be sent to the user being assigned with dedicated channel, different user can not use the resource of the dedicated channel be associated, so reduce the efficiency using the communication resource.In addition, the advantage of PS scheme is, distribute by selecting better radio channel (radiochannel) environment, scheduled radio channel for user and relevant (channel-dependent) scheduling gains of maximum channel, the throughput (throughput) of the limited wireless communication system of available communication resource can be improved.But the shortcoming of PS scheme is, owing to using shared channel, so a large amount of control informations will be transmitted together with data in each time.In CS scheme, be difficult to the channel dependent scheduling gain expecting to ensure in the ps scheme.
Such as, one of applicable communication service of CS or PS scheme is internet protocol voice (VoiceoverInternetProtocol, VoIP) service, and its proposition provides voice service by IP network.Along with the development of the IP network of such as internet and so on, VoIP service can provide high-quality voice communication by the speech bandwidth of the 56kbps overcoming transfer circuit network.In VoIP service, when paying for using the expense of internet, can calculate (cost-effectively) use overseas call.In addition, VoIP service can provide various application solution and extra service.Therefore, the number of users of VoIP service increases greatly.
Fig. 3 illustrates in conventional VoIP service for transmitting the process of voice communication service (traffic).
In figure 3, Reference numeral 301 represents the output being used for the vocoder (vocoder) analog voice signal being encoded to audio digital signals.As shown in Figure 3, the output being noiseless (mute) interval that the output at user's one's voice in speech interval or user do not speak according to the output of vocoder divides ON time period and OFF time period.In conventional voice traffic, in the very short time period (such as, 20ms), produce low volume data continuously.Therefore, when VoIP communication service arrives BS by IP network, due to as indicated by reference numeral 302, VoIP grouping has different IP network time of delay, so the signal received is irregular.
Summary of the invention
Technical problem
Above-mentioned CS or PS scheme is for transmitting VoIP grouping.Due to such as Fig. 3 Reference numeral 301 shown in, during the OFF time period, the waste of the communication resource is very large, and institute can not use the communication resource effectively for the system transmitting VoIP grouping in CS scheme is possible.On the other hand, the VoIP transmitted in the very short time period with low volume data for the system transmitting VoIP grouping in the ps scheme divides into groups.In this case, existing problems are, due to such as Fig. 3 Reference numeral 302 shown in irregular characteristic, so all the time, data all should transmit together with the control information for data receiver.
Therefore, exist and be used for minimizing the demand of the method and apparatus of the improvement of the communication resource for increasing power system capacity in a wireless communication system.
Technical solution
An aspect of exemplary embodiment of the present invention is devoted to solve at least above problem and/or shortcoming, and provides at least following advantage.Therefore, an aspect of exemplary embodiment of the present invention will be provided for using virtual circuit to exchange the method and apparatus of Resources allocation, and described method and apparatus can effectively distribute and use the communication resource in the wireless communication system using circuit switching and packet switching.
The another aspect of exemplary embodiment of the present invention will be provided for using virtual circuit to exchange the method and apparatus of Resources allocation, and described method and apparatus can minimize the waste of the communication resource in the wireless communication system of the communication service for transmitting the small data quantity with irregular time of delay continually.
The use virtual circuit that will be provided on the one hand again of exemplary embodiment of the present invention exchanges the method and apparatus transmitting and receive data in the mobile stations, and described method and apparatus can effectively distribute and use the communication resource in the wireless communication system using circuit switching and packet switching.
According to an aspect of exemplary embodiment of the present invention, provide for allocate communications resource to transmit the method for data in a wireless communication system to multiple user's mobile radio station (MS), wherein to specific user MS assigned with dedicated channel; Determine whether there is the data that will be sent to specific user MS; And when the data that will be sent to specific user MS do not exist, be the resource of the Resourse Distribute dedicated channel of shared channel.
According to the another aspect of exemplary embodiment of the present invention, provide for allocate communications resource to transmit the method for data in a wireless communication system to multiple user's mobile radio station (MS), wherein to specific user MS assigned with dedicated channel; And when the data volume that will be sent to specific user MS is greater than the capacity of distributed dedicated channel, to specific user MS additional allocation shared channel.
According to the another aspect of exemplary embodiment of the present invention, provide for allocate communications resource to transmit the equipment of data in a wireless communication system from base station (BS) to multiple user's mobile radio station (MS), wherein data buffer temporarily stores the data of a user then user that will be sent to multiple user MS; Resource allocator performs and is used for specific user MS assigned with dedicated channel and is the dispatch deal of the resource of the Resourse Distribute dedicated channel of shared channel when there are not the data that will be sent to specific user MS; And conveyer transmits the data of a user then user exported from data buffer in the radio channel distributing to user with appointed interval according to scheduling result.
According to the another aspect of exemplary embodiment of the present invention, providing the method for receiving data in user's mobile radio station (MS) of wireless communication system, wherein receiving from base station (BS) and being used in reception data dividing of dedicated channel; Monitor shared control channel and receive the control information being used for data receiver; And be received in the data that dedicated channel transmits, and when determining according to the result of receiving control information the data transmitting MS on a shared channel, receive the data from shared channel.
According to the another aspect of exemplary embodiment of the present invention, provide the equipment for receiving data in user's mobile radio station (MS) of wireless communication system from base station (BS), wherein control channel demodulator demodulation of downlink signal also receives the control information relating to shared channel; The signal that data channel demodulator demodulation receives from radio channel output grouping data; And data demodulation controller controls the reception of dedicated channel, and when determining according to the result of receiving control information the data transmitting MS on a shared channel, control data channel demodulator carrys out the signal that demodulation receives from shared channel.
According to the another aspect of exemplary embodiment of the present invention, providing the method for transmitting data in the mobile radio station (MS) of wireless communication system, wherein receiving the distribution being used for the dedicated channel that data transmit from base station (BS); Monitor that shared control channel receiving control information are used for data transmission; The resource to different user MS assigned with dedicated channel is determined whether by control information; And when the Resourse Distribute of different user MS is persistent resource allocation, use the resource by getting rid of persistent resource allocation from the resource of dedicated channel and the surplus resources obtained carries out data transmission.
According to the one side again of exemplary embodiment of the present invention, provide the equipment for transmitting data in a wireless communication system from mobile radio station (MS) to base station (BS), wherein control channel demodulator demodulation of downlink signal also receives the control information relating to shared channel; Data channel modulator modulation will be sent to the signal of radio channel and export modulated signal; And data modulation controller determines whether the resource into different user MS assigned with dedicated channel according to the result of receiving control information, and when the Resourse Distribute of different user MS is persistent resource allocation, the surplus resources that control data channel modulator obtains to use the resource by getting rid of persistent resource allocation from the resource of dedicated channel carries out data transmission.
Beneficial effect
The present invention can be provided for using VCS scheme to carry out the method for allocate communications resource, and described method can effectively be distributed by using CS and PS two schemes communication resources to distribute and use the communication resource.
In addition, the present invention can increase power system capacity by the waste minimizing the communication resource in the wireless communication system for frequently transmitting the communication service being sensitive to time of delay on a small quantity.
Accompanying drawing explanation
Connection with figures, from describe in more detail below, the above and other target of some exemplary embodiment of the present invention, feature and advantage will become more obvious, wherein:
Fig. 1 is the flow chart of diagram for using custom circuit exchange (CS) to transmit the process of data;
Fig. 2 is the flow chart of diagram for using conventional packet switching (PS) to transmit the process of data;
Fig. 3 diagram is used for the process transmitting voice communication service in Conventional Internet protocol voice (VoIP) service;
Fig. 4 is diagram according to exemplary embodiment of the present invention, for use virtual circuit to exchange flow chart that (VCS) carrys out the method for allocate communications resource;
Fig. 5 diagram is from base station to the example of the user's assigned with dedicated channel resource of two Fig. 4;
Fig. 6 diagram according to exemplary embodiment of the present invention, for the process for shared channel resources assigned with dedicated channel resource;
Fig. 7 is diagram according to exemplary embodiment of the present invention, flow chart for using VCS to carry out the method for allocate communications resource;
Fig. 8 be diagram according to exemplary embodiment of the present invention, in the mobile radio station using VCS the flow chart of method of reseptance;
Fig. 9 is the block diagram of diagram according to the structure of the conveyer of exemplary embodiment of the present invention, base station;
Figure 10 is the block diagram of diagram according to the structure of the receiver of exemplary embodiment of the present invention, base station; And
Figure 11 is that diagram is according to exemplary embodiment of the present invention, the flow chart using the transfer approach of the mobile radio station of VCS.
In whole accompanying drawing, identical Reference numeral represents identical element, characteristic sum structure by being interpreted as.
Embodiment
There is provided the material limited in the de-scription of such as detailed structure and component units and so on, to contribute to the complete understanding of exemplary embodiment of the present invention.Therefore, person of skill in the art will appreciate that, without departing from the scope and spirit in the present invention, the various change to embodiment described here and amendment can be made.In addition, in order to clear, for simplicity, the description of known function and structure is omitted.
First, the basic conception and technical term (terminology) that limit in exemplary embodiment of the present invention will briefly be described.
Use description to the basic skills of allocate communications resource in the present invention.When use be used for assigned with dedicated channel circuit switching (CS) scheme and for distribute shared channel packet switching (PS) scheme time, as in conventional CS scheme, to specific users allocation dedicated channel, then, when occurring being sent to the data of specific user in transmission interval, the dedicated channel of distributing transmits the data of specific user.When not having to occur being sent to the data of specific user, the communication resource being assigned to the dedicated channel be associated is switched to the resource of the shared channel of PS scheme, so that they are for transmitting the data of different user.When the communication resource allocation scheme is used, be the communication resource of shared channel resources assigned with dedicated channel in the transmission interval that there is not data transmission, the efficiency using the communication resource can be improved.
Exchange (VCS) by virtual circuit and define communication resource allocation scheme.Exemplary embodiment of the present invention will be described, wherein when the delivery time limiting initial transmission packet also frequently transmits little traffic business, in VCS scheme, reduce communicating control information amount, and transmit and receive dedicated channel and/or shared channel.
Fig. 4 is diagram according to exemplary embodiment of the present invention, flow chart for using VCS scheme to carry out the method for allocate communications resource.Fig. 4 illustrates in the conveyer of base station (BS) with the distribution of VCS scheme and the example using the communication resource.
In the step 401 of Fig. 4, the conveyer of BS carrys out assigned with dedicated channel by performing the dispatch deal be used for the specific users allocation communication resource linked by radio communication net (radionetwork).Such as, for assigned with dedicated channel, be used for the specific Walsh code of identification channel to specific users allocation in the wireless communication system of employing code division multiple access (CDMA), and to specific users allocation certain subcarriers resource in the wireless communication system using OFDM (OFDMA).For assigned with dedicated channel, in call setup or hand-over, perform the process be used for the specific Walsh code of specific users allocation or subcarrier resources routinely.
On the other hand, Fig. 5 illustrates the example of two user A from from BS to the step 401 of Fig. 4 and B assigned with dedicated channel resource.In Figure 5, horizontal axis representing time, and the longitudinal axis represents the communication resource.In a cdma system, the communication resource represents Walsh code.In OFDMA system, communication resource vice carrier wave.In Figure 5, the dedicated communication resource of user A is distributed in dash area instruction above, and the dedicated communication resource of user B is distributed in dash area instruction below.Part instruction between dash area does not have assigned with dedicated channel but is assigned with the communication resource of shared channel.
In the step 403 of Fig. 4, the conveyer of BS determines whether there are the data that will be sent to the CS user being assigned with dedicated channel in this transmission interval.Here, transmitting interval can be the delivery time interval (TTI) of time quantum as the data of transmission one grouping or frame, or can be in a communications system for separating of the factor (factor) at different time interval transmitting data.If determine there are not the data that will be sent to CS user in this transmission interval in step 403, then transmission interim of being associated of the conveyer of BS, the dedicated channel resource distributing to CS user is transformed into shared channel resources.Then, in step 405, the conveyer of BS transmits the data of different PS users on a shared channel.In this case, the control information for data demodulates of shared channel can transmit with data together with sent by shared channel.But, when the content of control information known by the receiver of mobile radio station (MS), can not need to send control information.
If as the determination result of step 403, there are the data that will be sent to the CS user be associated in this transmission interval, then in step 407, the conveyer of BS determines whether the packet that will transmit is initial transmission packet.If the packet transmitted is not initial transmission packet, then as in conventional CS scheme, the dedicated channel of distributing transmits data.On the other hand, if in step 407, the packet that transmit is determined to be initial transmission packet, then the conveyer of BS transmits data in the starting point of frame boundaries, in the dedicated channel of distributing.After step 409 or 411 transmits data on the dedicated channels, in step 413, the conveyer of BS proceeds to next and transmits interval, determines whether there is the data that will be sent to the CS user be associated, and repeats above process until end call.
Then, with reference to Fig. 5, the operation of step 407 and 411 is described in detail.First, when dedicated channel resources are allocated in the present invention, as shown in Reference numeral 501 and 502, the basis of an a user then user (user-by-user) arranges unique frame boundaries to make restriction, initial transmission packet can be transmitted in the starting point of frame boundaries in the system for supporting mixed spin system (HybridAutomaticRepeatRequest, HARQ).For supporting that the system of HARQ repeatedly divides and transmits a coding groups in initial transmission, the first repeating transmission, the second repeating transmission etc.In an exemplary realization, each is transmitted and is called that secondary grouping (subpacket) is transmitted.The conveyer of BS transmits each retransmission identifier, namely, as the secondary packet identifier of the control information of the notice of the sequence number for each secondary grouping queries to the receiver of MS.
As mentioned above, when transmitting secondary grouping to each user, limit the unique frame boundaries of an a user then user, by performing the amount initially sending and minimize control information in the starting point of the frame boundaries of the user be associated.In order to reference, when the unique frame boundaries and performing in the starting point of this frame boundaries limiting user about ordinary groups initially transmits, add the packetization delay time, and therefore cause harmful effect.But, when transmitting grouping (as VoIP communication service) with low volume data in the very short time period, the amount of control information can be reduced in the present invention.
In the diagram, as shown in the Reference numeral 503 of Fig. 5, the process based on HARQ with assigned with dedicated channel resource at equal intervals, can consider answering/no answering (ACK/NACK) from the physical layer of Ms simultaneously.When there are not the data that will be sent to CS user in the diagram, the dedicated channel resource distributed in the transmission interval be associated is exchanged to shared channel resources, and be that different PS users uses described shared channel resources in data transmit.It is noted that when as in step 407 and 411, when frame boundaries starts initially to transmit, optionally can perform the operation of step 407 and 411, to reduce the amount of communicating control information in the communication system supporting HARQ.
Fig. 6 diagram is according to exemplary embodiment of the present invention, for the process for shared channel resources assigned with dedicated channel resource.
In figure 6, horizontal axis representing time and the longitudinal axis represents the communication resource.In a cdma system, the communication resource represents Walsh code.In OFDMA system, communication resource vice carrier wave.In figure 6, the dedicated communication resource of user A is distributed in dash area instruction above, and the dedicated communication resource of user B is distributed in dash area instruction below.Part between dash area indicates not assigned with dedicated channel but distributes the communication resource of shared channel.
The Reference numeral 601 of Fig. 6 represents the unique frame boundaries of user A, and it is indicated similarly by the Reference numeral 501 of Fig. 5.The Reference numeral 602 of Fig. 6 represents when there are not the data that will be sent to user A in the transmission interval be associated, the dedicated channel resource of user A is distributed to the state of the shared channel resources that can be used by different user, and described Reference numeral 602 is corresponding with the operation of the step 405 of Fig. 4.
The Reference numeral 603 of Fig. 6 represents the unique frame boundaries of family B, and it is indicated similarly by the Reference numeral 502 of Fig. 5.The Reference numeral 605 of Fig. 6 represents when there are not the data that will be sent to user B in the transmission interval be associated such as shown in Reference numeral 604, and the dedicated channel resource of user B is distributed to different user as shared channel resources.This state with due in frame boundaries starting point for user B starts initially transmit and receive ACK from MS in second of the grouping that will be sent to user B transmits, and no longer need repeating transmission situation corresponding.
Fig. 7 is that diagram is according to exemplary embodiment of the present invention, for distributing the flow chart of the method for the communication resource using VCS.Fig. 7 diagram uses the example of shared channel resources extraly according to the data volume that will send for user.
In the step 701 of Fig. 7, the conveyer of BS carrys out assigned with dedicated channel by performing the dispatch deal be used for the user's allocate communications resource linked by radio communication net.Due to the distribution of dedicated channel and identical described in Fig. 4, so for clarity and conciseness, omit it and describe in detail.
In step 703, the conveyer of BS determines to be sent to the capacity whether data volume being assigned with the user of dedicated channel in transmission interval is before less than or equal to dedicated channel.If the data volume being sent to user is less than or equal to the capacity of dedicated channel, then as conventional CS scheme, dedicated channel is used to transmit data in step 705.On the other hand, if in step 703, the data volume that be sent to the user being assigned with dedicated channel is greater than the capacity of dedicated channel, then in step 707, the conveyer of BS distributes shared channel resources to the user be associated extraly.In step 709, the shared channel that the conveyer of BS distributes in preallocated dedicated channel and step 707 transmits the data of user.Although do not illustrate in the figure 7, due in step 709, for the user be associated uses shared channel in data transmit, so as conventional PS scheme, communicating control information on a shared control channel.
It is noted that not all user can use dedicated channel and shared channel as in the exemplary embodiment of fig. 7.That is, the user MS of dedicated channel and shared channel can be used should to determine whether to transmit its data on a shared channel by continuous monitoring shared control channel during call setup.For selecting this user MS in the process of assigned with dedicated channel in advance in the step 701 of Fig. 7.In step 705 or 709, after dedicated channel and/or shared channel transmit data, in step 711, the conveyer of BS proceeds to next and transmits interval, and determines whether there is the data that will be sent to the user be associated.Repeat above process, until end call.
Then, with reference to Fig. 8, the method for reseptance in the user MS using VCS scheme of the present invention is described.
Fig. 8 is diagram according to the flow chart of exemplary embodiment of the present invention, method of reseptance in the MS using VCS scheme.
In the step 801 of Fig. 8, by BS to user MS assigned with dedicated channel.Now, BS sends to user MS the information whether instruction supports shared channel in channel allocation.When the existence of the shared channel that predefine is supported between the bs and ms and the existing of the shared channel supported of preset MS time, in step 801, whether BS can omit for sending instruction shared channel is the information that MS supports.As conventional CS scheme, user MS receives data, and by monitoring that shared control channel determines whether to transmit its data on a shared channel in step 805 continuously.For the ease of explaining, Fig. 8 is illustrated in after step 803 receives dedicated channel, for monitoring the process of shared control channel in step 805.But, it is noted that the reception of dedicated channel and the reception of shared channel are independent execution.
Therefore, in step 805, user MS monitors that shared control channel is with demodulation control information continuously, and in step 807, determines to transmit its data on a shared channel when comprising user identifier (ID) in the control information.On the other hand, if user ID is not included in control information, then user MS determines not transmit its data on a shared channel.When determining the data transmitting user MS on a shared channel in step 807, then in step 809, user MS receives its data by demodulation shared channel in the transmission interval be associated.If there is no user MS data and complete the reception of shared channel, then in step 811, user MS proceeds to next and transmits interval, then repeats this process from step 803, until end call.
The structure being applied to BS and MS of above-mentioned communication resource allocation method and method of reseptance is described with reference to Fig. 9 and Figure 10.
Fig. 9 is the block diagram of diagram according to the structure of the conveyer of the base station of exemplary embodiment of the present invention.Fig. 9 diagram is applied to the example of the structure of the conveyer of the BS of the communication system using OFDM (OFDM) transfer scheme.
In fig .9, after the more high-rise reception data from communication network, data buffer 901 temporarily stores the data that will be sent to each user in down link (downlink).According to the capacity storing data in data buffer 901, resource allocator 903 scheduling will be sent to the communication resource of the data of each user and each user for data transmission.In the exemplary embodiment, the scheduling operation of resource allocator 903 performs by using the method for Fig. 4 to Fig. 7.OFDM symbol (symbol) generator 905 receives from data buffer 901 and transmits target data, under the control of resource allocator 903, then produce the OFDM symbol that will transmit.OFDM symbol generator 905 can be configured with the encoder, interleaver (interleaver), symbol mapper (symbolmapper) etc. that use in an ofdm system.
OFDM symbol conveyer 907 inserts personal distance (GuardInterval, GI) to the OFDM symbol produced from OFDM symbol generator 905, then transmits OFDM symbol to radio communication net.In addition, according to the scheduling result of resource allocator 903, OFDM symbol conveyer 907 transmits the data of user then user in the transmission interval of specifying in the radio channel be associated.OFDM symbol conveyer 907 is configured with GI inserter, radio frequency (RF) processor, antenna etc.
The device of the BS of Fig. 9 is the example of ofdm system.It will be apparent to one skilled in the art that the device using the resource allocator 903 of the method for Fig. 4 to Fig. 7 to can be applicable to the BS of the third generation (3G) network maybe can carry out the conveyer of the alternative communication network of grouping queries.
Figure 10 is the block diagram of diagram according to the structure of exemplary embodiment of the present invention, MS receiver.
In Fig. 10, control channel demodulator 1001 exports control information by demodulation control channel in predetermined process from down link signal.Here, when shared channels are used, control information, for shared channel, comprises user ID, resource information, data-rate information, modulation intelligence, coded message etc.The output of control channel demodulator 1001 is input to data demodulation controller 1003.Data demodulation controller 1003 control data channel demodulator 1005 receives dedicated channel and/or shared channel as in the method for reseptance of Fig. 8.
When data demodulation controller 1003 is according to the result of the control information received, when determining that its data transmit on a shared channel, its control data channel demodulator 1005 signal that demodulation receives from shared channel in the transmission interval be associated.Under control of the data demodulation controller 1003, data channel demodulator 1005 demodulation also exports the data channel distributed as dedicated channel and/or shared channel.In Fig. 10, control channel demodulator 1001 and data channel demodulator 1005 comprise the structure with decoder respectively.
Figure 11 is that diagram is according to exemplary embodiment of the present invention, the flow chart using the transfer approach of the MS of VCS scheme.With reference to Figure 11, the operation of the MS when method of the present invention is applied to uplink data transmission will be described.It is noted that identical method can be applicable to down link data transmission.
In fig. 11, in step 1101, MS receives the distribution of lasting (persistent) resource (namely dedicated channel) from BS.In step 1103, the MS being assigned with persistent resource receives and demodulation shared control channel (or data control channel).MS retrieves (retrieve) Compliance control information from the shared control channel of demodulation, and determines whether its persistent resource distributed distributes to different user according to VCS scheme of the present invention in step 1105.If in step 1105, the persistent resource being assigned to MS is not assigned to different user, then MS determines that the persistent resource that it distributes does not change, and uses persistent resource to transmit data in step 1107.
When in step 1105, when MS determines that the persistent resource that it distributes is assigned to different user, whether MS from shared control channel retrieval Compliance control information, and is persistent resource allocation in the Resourse Distribute that step 1109 determines different user.When the Resourse Distribute determining different user in step 1109 is not persistent resource allocation, MS proceeds to step 1111 to determine distributed persistent resource and not to change but by getting rid of the resource and the surplus resources that obtains of temporarily distributing for different user from the persistent resource distributed that can be used for the data transmitting MS during time be associated.Therefore, MS uses surplus resources to transmit data.
When MS be used in step 1111 transmit data by getting rid of temporary resource of distributing for different user and the surplus resources that obtains from the persistent resource distributed that can be used for the data transmitting MS time, can be applied to the time interval of different user by Resourse Distribute on the time point be associated, can be maybe preset time interval between time interval for shared control channel limits or BS and MS.In addition, the time interval can have from the unique frame boundaries for MS shown in the Reference numeral 603 of Fig. 6 to the scope of the starting point on next border.
On the other hand, if in step 1109, the Resourse Distribute for different user is defined as persistent resource allocation, then MS determines that the persistent resource that it distributes is changed.That is, in step 1113, MS determines that its new persistent resource is the surplus resources obtained by getting rid of the persistent resource for different user distributes from the persistent resource distributed as forward direction MS.MS uses new persistent resource to transmit data.Now, it is noted that and apply new persistent resource continuously after making resource changing.Then, MS repeats this process at following time interval (or time period) from step 1103.
The structure being applied to the conveyer of the MS of the transfer approach of Figure 11 can realize simply by using the structure of the receiver of MS described with reference to Figure 10.Such as, control channel demodulator 1001 can keep in the conveyer of MS.According to the present invention, the conveyer of MS can be configured with the data modulation controller and data channel modulator that are mapped to data demodulation controller 1003 and data channel demodulator 1005.
Although illustrate and describe the present invention with reference to some exemplary embodiment, but it should be appreciated by those skilled in the art that, when not departing from the spirit and scope defined by claims and equivalent thereof, the various changes in formal and details can be made to it.
Industrial applicibility
The present invention can be applicable to the wireless communication system using CS and PS two schemes communication resources to distribute.
Claims (22)
1. for allocate communications resource to transmit a method for data in a wireless communication system to multiple user's mobile radio station (MS), comprising:
To the resource of specific user MS assigned with dedicated channel;
Determine whether there is the data that will be sent to described specific user MS;
When the described data that will be sent to described specific user MS in the first interim do not exist, be temporarily the resource of dedicated channel described in the Resourse Distribute of shared channel in this first interim; And
When the described data that will be sent to described specific user MS in next interim exist, the resource of described dedicated channel transmits described data to described specific user MS,
Described method also comprises:
When the data volume that will be sent to described specific user MS comprises the capacity of the dedicated channel being greater than described distribution, in the second interim to described specific user MS additional allocation shared channel,
, wherein there are not the data that will transmit for described different user in this second interim in shared channel described in the communication resource distribution wherein using different user.
2. method according to claim 1, comprises further:
Described shared channel transmits the data of different user.
3. method according to claim 1, comprises further:
When the described data that will be sent to described specific user MS exist, determine whether described data are initial transmission packet; And
When the described data that will transmit are confirmed as described initial transmission packet, for described specific user MS transmits described data in the starting point of frame boundaries in described dedicated channel,
Wherein said wireless communication system supports mixed spin system (HARQ).
4. method according to claim 1, wherein distributes described dedicated channel resource with the time period of rule.
5. method according to claim 1, wherein said data comprise internet protocol voice (VoIP) grouping.
6. method according to claim 1, whether the distribution of wherein said dedicated channel comprises the described shared channel of transmission instruction is the message that described specific user MS supports.
7. for allocate communications resource to transmit an equipment for data in a wireless communication system from base station (BS) to multiple user's mobile radio station (MS), comprising:
Data buffer, for temporarily storing the data of a user then user that will be sent to described multiple user MS;
Resource allocator, for performing following dispatch deal: to the resource of specific user MS assigned with dedicated channel, and when the data that will be sent to described specific user MS in the first interim do not exist, be temporarily the resource of dedicated channel described in the Resourse Distribute of shared channel in this first interim; And
Conveyer, during for existing when the data that will transmit to described specific user MS in next interim, the resource of described dedicated channel transmits data to described specific user MS,
Wherein when the data volume that will be sent to described specific user MS is greater than the capacity of the described dedicated channel of distributing to described specific user MS, described resource allocator additionally distributes described shared channel to described specific user MS in the second interim,
, wherein there are not the data that will transmit for described different user in this second interim in shared channel described in the communication resource distribution wherein using different user.
8. equipment according to claim 7, whether wherein said resource allocator is configured to send the described shared channel of instruction by described conveyer is further the message that described specific user MS supports.
9. equipment according to claim 7, wherein when the described data that will transmit are confirmed as being initial transmission packet, described resource allocator is configured in the starting point of the frame boundaries of described specific user MS, use the transmission of described dedicated channel data dispatching further
Wherein said wireless communication system supports mixed spin system (HARQ).
10. equipment according to claim 9, wherein said data comprise internet protocol voice (VoIP) grouping.
11. 1 kinds, for receiving the method for data in user's mobile radio station (MS) of wireless communication system, comprising:
The distribution of the resource of the dedicated channel for receiving data is received from base station (BS);
Monitor shared control channel and receive the control information being used for described data receiver; And
The data that the uploading resource being received in described dedicated channel send, and when determining according to the result receiving described control information the data transmitting described MS on a shared channel, receive the described data from described shared channel in the first interim,
Wherein said shared channel is the communication resource distribution using different user, wherein there are not the data that will transmit for described different user in this first interim.
12. methods according to claim 11, comprise further:
Receive from BS and indicate whether the message supporting described shared channel.
13. methods according to claim 11, comprise further:
When the described data that will transmit are determined to be initial transmission packet, receive described data in the starting point of frame boundaries,
Wherein said wireless communication system supports mixed spin system (HARQ).
14. methods according to claim 13, wherein said data comprise internet protocol voice (VoIP) grouping.
15. 1 kinds, for the equipment receiving data from user's mobile radio station (MS) from base station (BS) at wireless communication system, comprising:
Control channel demodulator, also receives the control information relating to shared channel for demodulation of downlink signal;
Data channel demodulator, the signal received from radio channel for demodulation output grouping data; And
Data demodulation controller, for control dedicated channel reception and when according to receive the result of described control information determine the data transmitting described MS on described shared channel time, control described data channel demodulator and carry out the signal that demodulation receives from described shared channel in the first interim
Wherein said shared channel is the communication resource distribution using different user, wherein there are not the data that will transmit for described different user in this first interim.
16. equipment according to claim 15, wherein said control channel demodulator is configured to receive from described BS the message indicating whether to support described shared channel further.
17. equipment according to claim 15, wherein when the described data that will transmit are determined to be initial transmission packet, described data demodulation controller is configured to receive described data in the starting point of frame boundaries further,
Wherein said wireless communication system supports mixed spin system (HARQ).
18. equipment according to claim 17, wherein said data comprise internet protocol voice (VoIP) grouping.
19. for the method transmitting data in the mobile radio station (MS) of wireless communication system, comprising:
The distribution being used for the dedicated channel that data transmit is received from base station (BS);
Monitor shared control channel and receive the control information being used for data and transmitting;
By described control information, determine whether the resource of distributing described dedicated channel to different user MS; And
When the Resourse Distribute of described different user MS comprises persistent resource allocation, use the resource by getting rid of described persistent resource allocation in the resource from described dedicated channel and the surplus resources obtained performs described data transmission.
20. methods according to claim 19, comprise further:
When the described Resourse Distribute of described different user MS does not comprise described persistent resource allocation, by using the resource got rid of from the resource of described dedicated channel and temporarily distribute to described different user MS, the surplus resources obtained performs described data transmission.
21. 1 kinds in a wireless communication system from the equipment that mobile radio station (MS) transmits data to base station (BS), comprising:
Control channel demodulator, also receives the control information relating to shared channel for demodulation of downlink signal;
Data channel modulator, for modulating the signal that will be sent to radio channel and exporting described modulated signal; And
Data modulation controller, for determining whether the resource into different user MS assigned with dedicated channel according to the result receiving described control information, and when the Resourse Distribute of described different user MS comprises described persistent resource allocation, the surplus resources that obtains carries out data transmission to use the resource by getting rid of persistent resource allocation in the resource from described dedicated channel to control described data channel modulator.
22. equipment according to claim 21, wherein when the described Resourse Distribute for described different user MS does not comprise described persistent resource allocation, to use by getting rid of the resource of temporarily distributing to described different user MS in the resource from described dedicated channel, the surplus resources obtained carries out data transmission described data modulation controller control data channel modulator.
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| KR10-2005-0072782 | 2005-08-09 | ||
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| KR10-2006-0029938 | 2006-03-31 | ||
| KR1020060029938A KR100929077B1 (en) | 2005-08-09 | 2006-03-31 | Communication Resource Allocation Method Using Virtual Circuit Switching Method in Wireless Communication System and Data Transmission / Reception Method of Device and Terminal |
| PCT/KR2006/003128 WO2007018406A1 (en) | 2005-08-09 | 2006-08-09 | Method and apparatus for allocating communication resources using virtual circuit switching in a wireless communication system and method for transmitting and receiving data in a mobile station using the same |
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| ES2348758T3 (en) | 2007-12-13 | 2010-12-13 | Innovative Sonic Limited | PROCEDURE FOR ASSIGNING RADIO RESOURCES AND ASSOCIATED COMMUNICATIONS DEVICE. |
| KR101559320B1 (en) | 2008-02-18 | 2015-10-13 | 삼성전자주식회사 | Mobile system and base station system for effectively using licensed spectrum and shared spectrum |
| KR101613093B1 (en) * | 2010-01-25 | 2016-04-29 | 삼성전자주식회사 | Downlink harq channel allocation method in a wireless communication system and base station apparaus therefor |
| CN103283275B (en) * | 2011-01-05 | 2017-03-08 | 瑞典爱立信有限公司 | The load balance of data |
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| US6452924B1 (en) * | 1997-11-10 | 2002-09-17 | Enron Warpspeed Services, Inc. | Method and apparatus for controlling bandwidth in a switched broadband multipoint/multimedia network |
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| KR20070018665A (en) | 2007-02-14 |
| KR100929077B1 (en) | 2009-11-30 |
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Effective date of registration: 20190412 Address after: Espoo, Finland Patentee after: Technology Co., Ltd. of Nokia Address before: Gyeonggi Do, South Korea Patentee before: SAMSUNG ELECTRONICS CO., LTD. |