CN101238682A - 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 - Google Patents

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 Download PDF

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Publication number
CN101238682A
CN101238682A CNA2006800287363A CN200680028736A CN101238682A CN 101238682 A CN101238682 A CN 101238682A CN A2006800287363 A CNA2006800287363 A CN A2006800287363A CN 200680028736 A CN200680028736 A CN 200680028736A CN 101238682 A CN101238682 A CN 101238682A
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data
channel
resource
user
dedicated channel
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CN101238682B (en
Inventor
权桓准
崔成豪
李周镐
韩晋奎
吴承均
许允亨
金唯哲
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Nokia Technologies Oy
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Samsung Electronics Co Ltd
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Priority claimed from PCT/KR2006/003128 external-priority patent/WO2007018406A1/en
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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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H04L45/741—Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and apparatus using Virtual Circuit Switching (VCS) in a new scheme are provided for allocating and employing resources by combining Circuit Switching (CS) and Packet Switching (PS), in which a base station allocates resources of a dedicated channel using the CS to a user and then transmits data on the dedicated channel. When data is not transmitted to the user, the base station allocates the allocated dedicated channel resources for resources of a shared channel and transmits data of a different user. Therefore, system capacity can be increased and a waste of communication resources can be minimized in a wireless communication system for frequently transmitting a small amount of traffic that is sensitive to a delay time.

Description

In wireless communication system, use the method and apparatus of virtual circuit exchange allocate communications resource and use this method and apparatus in mobile radio station, to transmit and receive the method for data
Technical field
The present invention relates generally to the method and apparatus that is used in wireless communication system allocate communications resource.More particularly, the present invention relates to be used for using circuit switching and packet switching to distribute and use the method and apparatus of the communication resource effectively, and be used for using this method and apparatus to come to transmit and receive the method for data at mobile radio station at wireless communication system.
Background technology
Routinely, the communication resource allocation scheme of in wireless communication system, using be divided into circuit switching (Circuit Switching, CS) and packet switching (Packet Switching, PS) two class schemes.In the CS scheme, to the Radio Resource of specific users allocation fixed amount, dedicated channel (dedicated channel) just, and use dedicated channel transmits and receives data.
Fig. 1 is that diagram is used to use conventional CS scheme to transmit the flow chart of the process of data.An example that is used for conventional CS scheme assigned with dedicated channel, that the conveyer of (BS) uses in the base station is described briefly with reference to Fig. 1.
In the step 101 of Fig. 1, the conveyer of BS is used for the allocate communications resource by execution and handles assigned with dedicated channel to the specific user's who links by radio communication net scheduling.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 sign indicating number of identification channel to specific users allocation.In another example, in the wireless communication system that uses OFDM (OFDMA) to specific users allocation certain subcarriers resource.
For assigned with dedicated channel, in call setup or transfer (handoff) process, carry out the operation that is used for to specific Walsh sign indicating number of specific users allocation or certain subcarriers resource usually.In Fig. 1, step 103,105 and 107 is the processing that are used for transmitting data when being connected specific user's calling on the dedicated channel of distributing.That is to say that in step 103, the conveyer of BS determines whether to exist the data that will be sent to the user's (hereinafter, being called CS user) who connects by CS, in the transmission that is associated at interval, be described user's assigned with dedicated channel in step 101.Here, transmit delivery time interval (TTI) or the frame that refers at interval as the time quantum of the data that transmit a grouping.
If as definite result of step 103, in this transmission at interval, occur being sent to the CS user's data that is associated, then in step 105, the conveyer of BS transmits data on the dedicated channel of distributing to CS user.Yet, if as definite result of step 103, in this transmission at interval, not have to occur being sent to the CS user's data that is associated, 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 once more to exist and will be sent to the CS user's data that is associated.Repeat described processing up to end call.In Fig. 1, handle and have a problem: when not occurring to be sent to specific CS user's data in the transmission that is being associated at interval based on the communication resource distribution of CS, in identical transmission at interval, distribute to specific user's dedicated channel and can not distribute to different user.
Fig. 2 is that diagram is used to use conventional PS scheme to transmit the flow chart of data.An example that is used for conventional CS scheme assigned with dedicated channel, that the conveyer of (BS) uses in the base station is described briefly with reference to Fig. 2.
The PS scheme adopts the system resource of sharing (for example, the Walsh sign indicating number of cdma system, the subcarrier of OFDMA system etc.), and not to the specific users allocation dedicated channel, this is different from the CS scheme.That is to say that the wireless communication system that uses the PS scheme is by determining whether to come operation dispatching to handle to a certain user allocation system resource in each delivery time.In the step 201 of Fig. 2, the conveyer of BS determines that by internal schedule parts (scheduler) (not shown) whether transmitting data to a certain user in this transmission at interval comes operation dispatching to handle, and distributes shared channel to the user who is associated then.According to scheduling result, a plurality of users can be assigned to shared channel simultaneously.
In the scheduling of step 201 was handled, a user is set, and then a user's (user-by-user) transmission data volume and data transmitted the needed traffic.In step 203, according to scheduling result, the conveyer of BS does not transmit data on the shared channel that distributes to the user, transmits the channel control information of sharing but also go up at shared control channel (SCCH), so that can receive shared channel.Routinely, the shared channel control information comprises user identifier (ID), resource information, data-rate information, modulation intelligence, coded message etc.
In call setup or hand-over to user's distributing user ID.Mobile radio station (MS) detects user ID from the control channel of sharing.When a plurality of users received shared channel simultaneously, MS can detect the transmission data of himself in the transmission that is associated at interval.Resource information is to transmit the information of the employed communication resource about data.The transfer rate of the data that the data-rate information indication will transmit in each transmits at interval.The modulation intelligence indication is used to transmit the modulation scheme of data, as Quadrature Phase Shift Keying (QPSK), 8-phase shift keying (8PSK) and 16-quadrature amplitude modulation (16QAM) etc.Coding method and code rate (code rate) that the coded message indication is used in transport process.
On shared control channel and shared channel after communicating control information and the data, in step 205, the conveyer of BS advances to (move to), and next transmits at interval, and repeats described processing till end call from step 201 in step 203.
Above-mentioned CS or PS scheme have the following advantages and shortcoming.
At first, the advantage of CS scheme is, because assigned with dedicated channel and transmit data on dedicated channel, so reduced the control information amount that is used for the data that will transmit.Yet the shortcoming of CS scheme is, because when not existing will be sent to the user's data that has been assigned with dedicated channel the time, different user can not use the resource of the dedicated channel that is associated, so reduced the efficient of using the communication resource.In addition, the advantage of PS scheme is, by select better radio channel (radio channel) environment, scheduling Radio Channel Assignments and maximum channel relevant (channel-dependent) scheduling gain for the user, can improve the throughput (throughput) of available communication resource limited wireless communication system.Yet the shortcoming of PS scheme is, because the use shared channel, so all will transmit a large amount of control informations with data in each time.In the CS scheme, be difficult to be desirably in the relevant scheduling gain of the channel that guarantees in the PS scheme.
For example, one of CS or the applicable communication service of PS scheme are that (its proposition provides voice service by IP network to internet protocol voice for Voiceover Internet Protocol, VoIP) service.Along with the development of the IP network such as the internet, the speech bandwidth of the 5 6kbp s that VoIP service can be by overcoming the transfer circuit network provides high-quality voice communication.In the VoIP service, when payment is used to use the expense of internet, can calculates ground (cost-effectively) and use calling abroad.In addition, the VoIP service can provide various application solutions and extra service.Therefore, the number of users of VoIP service increases greatly.
Fig. 3 illustrates the processing that is used to transmit voice communication service (traffic) in conventional VoIP service.
In Fig. 3, Reference numeral 301 expressions are used for analog voice signal is encoded to the output of the vocoder (vocoder) of audio digital signals.As shown in Figure 3, the output according to vocoder is that user's one's voice in speech output or user at interval do not have the output at noiseless (mute) interval in a minute to divide ON time period and OFF time period.In conventional voice communication service, (for example, produce low volume data continuously in 20ms) in the very short time period.Therefore, when the VoIP communication service arrives BS by IP network, because shown in Reference numeral 302, the VoIP grouping has different IP network time of delay, so the signal that is received is irregular.
Summary of the invention
Technical problem
Above-mentioned CS or PS scheme are used to transmit the VoIP grouping.Because shown in the Reference numeral 301 of Fig. 3, during the OFF time period waste of the communication resource very big, may not can use the communication resource effectively so be used for transmitting the system of VoIP grouping in the CS scheme.On the other hand, be used in the very short time period, transmitting the VoIP grouping that has low volume data in the system of PS scheme transmission VoIP grouping.In this case, existing problems are, because the irregular characteristic shown in the Reference numeral 302 of Fig. 3, so all the time, data all should transmit with the control information that is used for Data Receiving.
Therefore, there is the demand be used for being used to the improved method and apparatus that increases power system capacity and minimize the communication resource at wireless communication system.
Technical solution
An aspect of exemplary embodiment of the present invention is devoted to solve above at least problem and/or shortcoming, and following at least advantage is provided.Therefore, an aspect of exemplary embodiment of the present invention will be provided for using virtual circuit to exchange method of allocating resources and equipment, and described method and apparatus can distribute and use the communication resource effectively in the wireless communication system that uses circuit switching and packet switching.
Will being provided on the other hand of exemplary embodiment of the present invention uses virtual circuit to exchange method of allocating resources and equipment, and described method and apparatus can minimize the waste of the communication resource at the wireless communication system of the communication service that is used for transmitting continually the small data quantity that has irregular time of delay.
The one side again of exemplary embodiment of the present invention will be provided for using the virtual circuit exchange to transmit and receive the method and apparatus of data in mobile radio station, and described method and apparatus can distribute and use the communication resource effectively in the wireless communication system of use circuit switching and packet switching.
According to an aspect of exemplary embodiment of the present invention, provide to be used for the allocate communications resource to transmit the method for data to a plurality of user's mobile radio stations (MS), wherein to specific user MS assigned with dedicated channel at wireless communication system; Determine whether to exist 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 resource allocation dedicated channel of shared channel.
According to exemplary embodiment of the present invention on the other hand, provide and be used for the allocate communications resource to transmit the method for data to a plurality of user's mobile radio stations (MS), wherein to specific user MS assigned with dedicated channel at wireless communication system; And when the data volume that will be sent to specific user MS during greater than the capacity of the dedicated channel of being distributed, to specific user MS additional allocation shared channel.
According to exemplary embodiment of the present invention on the other hand, provide to be used for the allocate communications resource, wherein the temporary transient storage of the data buffer then user's data of a user that will be sent to a plurality of user MS so that (BS) transmits the equipment of data to a plurality of user's mobile radio stations (MS) from the base station at wireless communication system; Resource allocator carries out that to be used for to specific user MS assigned with dedicated channel and when not having the data that will be sent to specific user MS be that the scheduling of resource of resource allocation dedicated channel of shared channel is handled; And conveyer transmits from a user of a data buffer output then user's data with appointed interval distributing on user's the radio channel according to scheduling result.
According to exemplary embodiment of the present invention on the other hand, provide the method that is used for receiving at user's mobile radio station (MS) of wireless communication system data, wherein the branch of (BS) reception dedicated channel is used in the reception data from the base station; Monitor shared control channel and receive the control information that is used for Data Receiving; And be received in the data that transmit on the dedicated channel, and when the result according to receiving control information determines to transmit the data of MS on shared channel, receive data from shared channel.
According to exemplary embodiment of the present invention on the other hand, the equipment that is used in user's mobile radio station (MS) (BS) reception data from the base station of wireless communication system is provided, and wherein control channel demodulator demodulation of downlink signal and reception relate to the control information of shared channel; The signal that the data channel demodulator demodulation receives from radio channel is also exported grouped data; And the reception of data demodulates controller control dedicated channel, and when the result according to receiving control information determines to transmit the data of MS on shared channel, the signal that the control data channel demodulator comes demodulation to receive from shared channel.
According to exemplary embodiment of the present invention on the other hand, the method that provides the mobile radio station (MS) that is used at wireless communication system to transmit data, wherein (BS) receives the distribution that is used for the dedicated channel that data transmit from the base station; Monitor that shared control channel and receiving control information are used for data and transmit; Determine whether resource by control information to different user MS assigned with dedicated channel; And when the resource allocation of different user MS is persistent resource allocation, use the surplus resources that obtains by the resource of from the resource of dedicated channel, getting rid of persistent resource allocation to come actual figure reportedly to send.
One side again according to exemplary embodiment of the present invention, provide to be used for transmitting the equipment of data from mobile radio station (MS) to base station (BS), wherein control channel demodulator demodulation of downlink signal and receive the control information that relates to shared channel at wireless communication system; The data channel modulators modulate will be sent to the signal of radio channel and export modulated signal; And the data-modulated controller determines whether resource into different user MS assigned with dedicated channel according to the result of receiving control information, and when the resource allocation of different user MS was persistent resource allocation, the control data channel modulator came actual figure reportedly to send to use the surplus resources that obtains by the resource of getting rid of persistent resource allocation from the resource of dedicated channel.
Beneficial effect
The present invention can be provided for using the VCS scheme to come the method for allocate communications resource, and described method can be by using CS and two kinds of scheme communication resources of PS to distribute to distribute effectively and use the communication resource.
In addition, the present invention can increase power system capacity by the waste that minimizes the communication resource being used for the wireless communication system that frequent transmission is sensitive to the communication service of time of delay on a small quantity.
Description of drawings
Connection with figures, from following more detailed description, the above and other target of some exemplary embodiment of the present invention, feature and advantage will become more obvious, wherein:
Fig. 1 is that diagram is used to use custom circuit exchange (CS) to transmit the flow chart of the processing of data;
Fig. 2 is that diagram is used to use conventional packet switching (PS) to transmit the flow chart of the processing of data;
Fig. 3 diagram is used for the processing in conventional internet protocol voice (VoIP) service transmission voice communication service;
Fig. 4 be diagram according to exemplary embodiment of the present invention, be used to use virtual circuit exchange (VCS) to come the flow chart of the method for allocate communications resource;
The example of Fig. 5 diagram two user's assigned with dedicated channel resources to Fig. 4 from the base station;
Fig. 6 diagram is according to processing exemplary embodiment of the present invention, that be used to shared channel resources assigned with dedicated channel resource;
Fig. 7 be diagram according to exemplary embodiment of the present invention, be used to use VCS to come the flow chart of the method for allocate communications resource;
Fig. 8 be diagram according to exemplary embodiment of the present invention, in the mobile radio station that uses 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 the flow chart of diagram according to the transfer approach of the mobile radio station of exemplary embodiment of the present invention, use VCS.
In whole accompanying drawing, identical Reference numeral will be interpreted as expression components identical, feature and structure.
Embodiment
Provide the material that in description, limits such as detailed structure and component units, to help the complete understanding of exemplary embodiment of the present invention.Therefore, person of skill in the art will appreciate that, under the prerequisite that does not depart from the scope of the present invention with spirit, can make various changes and modification embodiment described here.In addition, for clear, for simplicity, omit the description of known function and structure.
At first, will basic conception and the technical term (terminology) that limit in the exemplary embodiment of the present invention be described briefly.
Use description to the basic skills of allocate communications resource in the present invention.When use is used for circuit switching (CS) scheme of assigned with dedicated channel and is used to distribute packet switching (PS) scheme of shared channel, as in the conventional CS scheme, to the specific users allocation dedicated channel, when in transmitting at interval, occurring to be sent to specific user's data then, on the dedicated channel of distributing, transmit specific user's data.When not having to occur to be sent to specific user's data, the communication resource that is assigned to the dedicated channel that is associated is switched to the resource of the shared channel of PS scheme, so that they are used to transmit the data of different user.When using communication resource allocation scheme, in the transmission that does not exist data to transmit at interval, be the communication resource of shared channel resources assigned with dedicated channel, so that can improve the efficient of using the communication resource.
By virtual circuit exchange (VCS) definition communication resource allocation scheme.To describe exemplary embodiment of the present invention, and wherein when the little traffic of also frequent transmission of the delivery time that limits initial transmission packet is professional, in the VCS scheme, will have reduced the communicating control information amount, and transmitted and reception dedicated channel and/or shared channel.
Fig. 4 be diagram according to exemplary embodiment of the present invention, be used to use the VCS scheme to come the flow chart of the method for allocate communications resource.Fig. 4 illustrates the example of distributing and use the communication resource in the conveyer of base station (BS) with the VCS scheme.
In the step 401 of Fig. 4, the conveyer of BS is used for handling assigned with dedicated channel to the scheduling of the specific users allocation communication resource that links by radio communication net (radio network) by execution.For example, be assigned with dedicated channel, the specific Walsh sign indicating number that in the wireless communication system of employing code division multiple access (CDMA), is used for identification channel to specific users allocation, and in the wireless communication system that uses OFDM (OFDMA) to specific users allocation certain subcarriers resource.Be assigned with dedicated channel, in call setup or hand-over, carry out the processing that is used for to specific Walsh sign indicating number of specific users allocation or subcarrier resources routinely.
On the other hand, Fig. 5 illustrates from two the user A of BS to the step 401 of Fig. 4 and the example of B assigned with dedicated channel resource.In Fig. 5, the transverse axis express time, and the longitudinal axis is represented the communication resource.In cdma system, the communication resource is represented the Walsh sign indicating number.In the OFDMA system, communication resource vice carrier wave.In Fig. 5, the dedicated communication resource of user A is distributed in top dash area indication, and the dedicated communication resource of user B is distributed in the indication of following dash area.Part between dash area is indicated the communication resource that does not have assigned with dedicated channel but distributed shared channel.
In the step 403 of Fig. 4, whether the conveyer of BS is determined to exist in this transmission at interval and will be sent to the CS user's data of having distributed dedicated channel.Here, transmission can be delivery time interval (TTI) or the frame as the time quantum of the data that transmit a grouping at interval, perhaps can be the factor (factor) that is used to separate the different time interval of transmitting data in communication system.If determining not exist in this transmission at interval in step 403 to be sent to the CS user's data, then the conveyer of BS is transformed into shared channel resources in the transmission interim that is associated with the dedicated channel resource of distributing to CS user.Then, in step 405, the conveyer of BS transmits different PS user's data on shared channel.In this case, the control information that is used for data demodulates of shared channel can transmit with data and send by shared channel.Yet, when the receiver of mobile radio station (MS) has been known the content of control information, can not need to send control information.
If as definite result of step 403, in this transmission at interval, exist to be sent to the CS user's data that is associated, then in step 407, the conveyer of BS determines whether the packet that will transmit is initial transmission packet.If the packet that transmits is not an initial transmission packet, then as in the conventional CS scheme, on the dedicated channel of distributing, transmit data.On the other hand, if in step 407, it is initial transmission packet that the packet that transmit is determined, and then the conveyer of BS is on the starting point of frame boundaries, transmit data on the dedicated channel of distributing.Step 409 or 411 transmitted data on dedicated channel after, in step 413, the conveyer of BS advanced to next and transmits at interval, determined whether to exist to be sent to the CS user's data that is associated, and repeated above the processing till end call.
Then, with reference to Fig. 5, describe the operation of step 407 and 411 in detail.At first, when assigned with dedicated channel resource in the present invention, shown in Reference numeral 501 and 502, then unique frame boundaries is set to make restriction on a user's (user-by-user) the basis a user, so that can (Hybrid Automatic Repeat Request, the starting point at frame boundaries in system HARQ) transmits initial transmission packet being used to support the mixed automatic retransmission request.A coding groups is repeatedly divided and transmitted to be used for supporting the system of HARQ to retransmit in initial transmission, first, second repeating transmission etc.In an exemplary realization, each transmission is called secondary grouping (subpacket) transmits.The conveyer of BS transmits each retransmission identifier to the receiver of MS, just, and as the secondary packet identifier of the control information of the notice that is used for the sequence number that each secondary grouping transmits.
As mentioned above, when transmitting secondary grouping to each user, limits then unique frame boundaries of a user of a user, initially send the amount that minimizes control information by execution on the starting point of the user's who is associated frame boundaries.In order to reference, when carrying out initial the transmission on unique frame boundaries that limits the user about ordinary groups and the starting point, increased the packetization delay time, and therefore caused harmful effect at this frame boundaries.Yet, when transmission has the grouping (as the VoIP communication service) of low volume data in the very short time period, can reduce the amount of control information in the present invention.
In Fig. 4, shown in the Reference numeral 503 of Fig. 5, can consider answering/no answering (ACK/NACK) from the physical layer of Ms simultaneously with assigned with dedicated channel resource uniformly-spaced based on the processing of HARQ.When not existing in Fig. 4 will be sent to the CS user's data time, the dedicated channel resource that will distribute in the transmission that is associated at interval exchanges to shared channel resources, and be different PS user's described shared channel resources of use in data transmit.Be noted that when as in step 407 and 411 when frame boundaries began initially to transmit, optionally execution in step 407 and 411 operation was so that the amount of minimizing communicating control information in the communication system of support HARQ.
Fig. 6 diagram according to exemplary embodiment of the present invention, be used to the processing of shared channel resources assigned with dedicated channel resource.
In Fig. 6, transverse axis express time and the longitudinal axis is represented the communication resource.In cdma system, the communication resource is represented the Walsh sign indicating number.In the OFDMA system, communication resource vice carrier wave.In Fig. 6, the dedicated communication resource of user A is distributed in top dash area indication, and the dedicated communication resource of user B is distributed in the indication of following dash area.Part between dash area is indicated assigned with dedicated channel not but is distributed the communication resource of shared channel.
Unique frame boundaries of the Reference numeral 601 expression user A of Fig. 6, its Reference numeral 501 by Fig. 5 is indicated similarly.Reference numeral 602 expressions of Fig. 6 are not when existing the data that will be sent to user A in the transmission that is being associated at interval, 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.
Unique frame boundaries of the Reference numeral 603 expression family B of Fig. 6, its Reference numeral 502 by Fig. 5 is indicated similarly.Reference numeral 605 expressions of Fig. 6 are distributed to different user with the dedicated channel resource of user B as shared channel resources when not having the data that will be sent to user B in the transmission that is associated shown in Reference numeral 604 at interval.This state with since the frame boundaries starting point begun for user B initial transmit and second transmission in the grouping that will be sent to user B in receive ACK from MS, and no longer need situation about retransmitting corresponding.
Fig. 7 be diagram according to exemplary embodiment of the present invention, be used to distribute the flow chart of the method for the communication resource that uses VCS.Fig. 7 diagram is according to the example that will use shared channel resources for the data volume that the user sends extraly.
In the step 701 of Fig. 7, the conveyer of BS is used for handling assigned with dedicated channel to the scheduling of the user's allocate communications resource that links by radio communication net by execution.Because so identical with described in Fig. 4 of the distribution of dedicated channel for clarity and conciseness, omitted its detailed description.
In step 703, the conveyer of BS is determined to be sent to the capacity whether the user's data amount that has been assigned with dedicated channel in transmission at interval before is less than or equal to dedicated channel.If be sent to the capacity that the user's data amount is less than or equal to dedicated channel, then as conventional CS scheme, use dedicated channel to transmit data in step 705.On the other hand, if in step 703, be sent to the user's data amount that the has been assigned with dedicated channel capacity greater than dedicated channel, then in step 707, the conveyer of BS distributes shared channel resources to the user who is associated extraly.In step 709, transmit user's data on the shared channel that the conveyer of BS distributes in preallocated dedicated channel and step 707.Although in Fig. 7, do not illustrate, because in step 709, for the user who is associated uses shared channel in data transmit, so as conventional PS scheme, communicating control information on shared control channel.
Be noted that not all user can use dedicated channel and shared channel as in the exemplary embodiment of Fig. 7.That is to say, can use the user MS of dedicated channel and shared channel should be by determine whether on shared channel to transmit its data at continuous monitoring shared control channel during the call setup.This user MS is selected in the processing that is used for assigned with dedicated channel in the step 701 of Fig. 7 in advance.In step 705 or 709, on dedicated channel and/or shared channel, transmit after the data, in step 711, the conveyer of BS advances to next and transmits at interval, and determines whether to exist and will be sent to the user's data that is associated.Repeat above the processing, till end call.
Then, with reference to Fig. 8 the method for reseptance in the user MS that uses the VCS scheme of the present invention is described.
Fig. 8 is diagram according to exemplary embodiment of the present invention, the flow chart of method of reseptance in the MS that uses the VCS scheme.
In the step 801 of Fig. 8, by BS to user MS assigned with dedicated channel.At this moment, BS sends whether indication supports shared channel in channel allocation information to user MS.When the existence that is predefined in the shared channel of supporting between BS and the MS and when presetting the existing of shared channel that MS supports, in step 801, BS can omit whether be used to send the indication shared channel be the information that MS supports.As conventional CS scheme, user MS receives data, and by monitoring continuously that in step 805 shared control channel determines whether to transmit its data on shared channel.For the ease of explaining, Fig. 8 is illustrated in step 803 and receives after the dedicated channel, is used for monitoring in step 805 processing of shared control channel.Yet, be noted that the reception of dedicated channel and the reception of shared channel are independent the execution.
Therefore, in step 805, user MS monitors shared control channel continuously with the demodulation control information, and in step 807, determines to transmit its data when comprising user identifier (ID) in control information on shared channel.On the other hand, if user ID is not included in the control information, then user MS determines not transmit its data on shared channel.When determining in step 807 to transmit the data of user MS on shared channel, then in step 809, user MS receives its data by demodulation shared channel in the transmission that is associated at interval.The if there is no data of user MS and finished the reception of shared channel, then in step 811, user MS advances to next and transmits at interval, repeats this processing from step 803 then, till end call.
The structure of the BS and the MS that are applied to 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 structure of conveyer of the BS of the communication system of using OFDM (OFDM) transfer scheme.
In Fig. 9, after the more high-rise reception data of communication network, data buffer 901 temporary transient storage in down link (downlink) will be sent to each user's data.According to the capacity of storage data in data buffer 901, resource allocator 903 scheduling will be sent to each user's data and be used for each user's communications resource that data transmit.In the exemplary embodiment, the scheduling operation of resource allocator 903 is carried out to the method for Fig. 7 by using Fig. 4.OFDM code element (symbol) generator 905 receives from data buffer 901 and transmits target data, produces the OFDM code element that will transmit then under the control of resource allocator 903.OFDM code element generator 905 can dispose the encoder that uses, interleaver (interleaver), symbol mapper (symbol mapper) etc. in ofdm system.
OFDM symbol transmitter 907 to the OFDM code element that from OFDM code element generator 905, produces insert personal distance (Guard Interval, GI), then to radio communication network transmission OFDM code element.In addition, according to the scheduling result of resource allocator 903, transmit then user's data of a user on the radio channel that OFDM symbol transmitter 907 is being associated in the transmission at interval of appointment.OFDM symbol transmitter 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 and use Fig. 4 to can be applicable to the conveyer of the alternative communication network that the device of the BS of the third generation (3G) network maybe can divide into groups to transmit to the resource allocator 903 of the method for Fig. 7.
Figure 10 is the block diagram of diagram according to the structure of exemplary embodiment of the present invention, MS receiver.
In Figure 10, control channel demodulator 1001 is exported control information by demodulation control channel in predetermined process from down link signal.Here, when using shared channel, control information is used 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 demodulates controller 1003.Data demodulates controller 1003 control data channel demodulators 1005 receive dedicated channel and/or shared channel as in the method for reseptance of Fig. 8.
As the result of data demodulates controller 1003 according to the control information that receives, when determining that its data transmit on shared channel, its control data channel demodulator 1005 signal that demodulation receives from shared channel in the transmission that is associated at interval.Under the control of data demodulates controller 1003, data channel demodulator 1005 demodulation and output are as the data channel of dedicated channel and/or shared channel distribution.In Figure 10, control channel demodulator 1001 and data channel demodulator 1005 comprise the structure that has decoder respectively.
Figure 11 is the flow chart of diagram according to the transfer approach of the MS of exemplary embodiment of the present invention, use VCS scheme.With reference to Figure 11, will the operation of MS when method of the present invention is applied to the uplink data transmission be described.Be noted that identical method can be applicable to down link data and transmits.
In Figure 11, in step 1101, MS receives the distribution of lasting (persistent) resource (dedicated channel just) from BS.In step 1103, the MS that has been assigned with persistent resource receives and demodulation shared control channel (or data control channel).MS shares control information from the shared control channel of demodulation retrieval (retrieve), and determines in step 1105 whether VCS scheme according to the present invention is distributed to different user for the persistent resource of its distribution.If in step 1105, the persistent resource that is assigned to MS is not assigned to different user, and then MS determines that the persistent resource of its distribution does not change, and uses persistent resource to transmit data in step 1107.
Whether when in step 1105, when MS determined that the persistent resource of its distribution is assigned to different user, MS shared control information from the shared control channel retrieval, and be persistent resource allocation in the resource allocation that step 1109 is identified for different user.When the resource allocation that is identified for different user in step 1109 was not persistent resource allocation, MS advanced to that step 1111 determines that the persistent resource distributed does not change but by get rid of the surplus resources that the resource of temporarily distributing for different user obtains from the persistent resource that is distributed of the data that can be used for transmitting MS during time that is associated.Therefore, MS uses surplus resources to transmit data.
When MS uses when step 1111 transmits data by the surplus resources of getting rid of temporary resource of distributing as different user obtain from the persistent resource that is distributed of the data that can be used for transmitting MS, can being applied on the time point that is associated to the time interval of different user resource allocation, maybe can be the time interval of presetting between time interval of limiting for shared control channel or BS and the MS.In addition, the time interval can have from shown in the Reference numeral 603 of Fig. 6 at unique frame boundaries of MS scope to the starting point on next border.
On the other hand, if in step 1109, will be defined as persistent resource allocation at the resource allocation of different user, then MS determines that the persistent resource of its distribution is changed.That is to say that in step 1113, MS determines that its new persistent resource is the surplus resources that obtains by the persistent resource that eliminating from the persistent resource that distributes as forward direction MS distributes for different user.MS uses new persistent resource to transmit data.At this moment, be noted that and after making resource changing, apply new persistent resource continuously.Then, MS repeats this processing in next time interval (or time period) from step 1103.
The structure of conveyer of MS that is applied to the transfer approach of Figure 11 can realize simply by the structure of using the receiver of MS described with reference to Figure 10.For example, control channel demodulator 1001 can keep in the conveyer of MS.According to the present invention, the conveyer of MS can be disposed the data-modulated controller and the data channel modulator that are mapped to data demodulates controller 1003 and data channel demodulator 1005.
Though illustrate and described the present invention with reference to some exemplary embodiment, but it should be appreciated by those skilled in the art that, under situation about not breaking away from, can make in form and the various changes on the details it by claims and the defined spirit and scope of equivalent thereof.
Industrial applicibility
The radio communication that the present invention can be applicable to use CS and PS two schemes communication resources to distribute is System.

Claims (36)

1. one kind is used for the allocate communications resource to transmit the method for data at wireless communication system to a plurality of user's mobile radio stations (MS), comprising:
To specific user MS assigned with dedicated channel;
Determine whether to exist the data that will be sent to described specific user MS; And
When the described data that will be sent to described specific user MS do not exist, be the resource of the described dedicated channel of resource allocation of shared channel.
2. method according to claim 1 further comprises:
When the described data that will be sent to described specific user MS exist, on described dedicated channel, transmit the described data of described specific user MS.
3. method according to claim 1 further comprises:
On described shared channel, transmit the data of different user.
4. method according to claim 1 further comprises:
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 is transmitting described data on described dedicated channel on the starting point of frame boundaries.
5. method according to claim 4, wherein said wireless communication system is supported mixed automatic retransmission request (HARQ).
6. method according to claim 1 is wherein distributed described dedicated channel resource with the time period of rule.
7. method according to claim 1, wherein said data comprise internet protocol voice (VoIP) grouping.
8. one kind is used for the allocate communications resource to transmit the method for data at wireless communication system to a plurality of user's mobile radio stations (MS), comprising:
To specific user MS assigned with dedicated channel; And
When the data volume that will be sent to described specific user MS comprises capacity greater than the dedicated channel of described distribution, to described specific MS additional allocation shared channel.
9. method according to claim 8 is wherein used the described shared channel of communication resource distribution of different user, and not existing in the transmission that is associated at interval will be the data that described different user transmits.
10. method according to claim 8, the distribution of wherein said dedicated channel comprise whether send the described shared channel of indication is the message that described specific user MS supports.
11. method according to claim 8, wherein when the data volume that will be sent to described specific user MS comprise at least less than with the capacity of the dedicated channel that equals described distribution in one of the time, use described dedicated channel to transmit described data.
12. one kind is used for the allocate communications resource so that (BS) comprises to the equipment of a plurality of user's mobile radio stations (MS) transmission data from the base station at wireless communication system:
Data buffer is used for temporarily storing a user that will be sent to described a plurality of user MS and follows a user's data;
Resource allocator is used to carry out and is used for to specific user MS assigned with dedicated channel and when the data that will be sent to described user MS do not exist, for the scheduling of the resource of the described dedicated channel of resource allocation of shared channel is handled; And
Conveyer is used for according to scheduling result, transmits then user's data from the described user of described data buffer output on user's the radio channel distributing at interval with the transmission of appointment.
13. equipment according to claim 12, wherein when the data volume that will be sent to described specific user MS during 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.
14. whether equipment according to claim 13, wherein said resource allocator further are configured to send the described shared channel of indication by described conveyer is the message that described specific user MS supports.
15. equipment according to claim 12, wherein when the described data that will transmit were confirmed as being initial transmission packet, described resource allocator further was configured to use on the starting point of the frame boundaries of described specific user MS described dedicated channel data dispatching to transmit.
16. equipment according to claim 15, wherein said wireless communication system is supported mixed automatic retransmission request (HARQ).
17. equipment according to claim 15, wherein said data comprise internet protocol voice (VoIP) grouping.
18. a method that is used for receiving at user's mobile radio station (MS) of wireless communication system data comprises:
(BS) receives the distribution of the dedicated channel be used to receive data from the base station;
Monitor shared control channel and receive the control information that is used for described Data Receiving; And
Be received in the data that transmit on the described dedicated channel, and when determining on described shared channel, to transmit the data of described MS, receive described data from described shared channel according to the result who receives described control information.
19. method according to claim 18 further comprises:
Receive the message that indicates whether to support described shared channel from BS.
20. method according to claim 18 further comprises:
When the described data that will transmit are determined when being initial transmission packet, receive described data in the starting point of frame boundaries.
21. method according to claim 20, wherein said wireless communication system is supported mixed automatic retransmission request (HARQ).
22. method according to claim 20, wherein said data comprise internet protocol voice (VoIP) grouping.
23. the equipment from user's mobile radio station (MS) (BS) reception data from the base station that is used at wireless communication system comprises:
The control channel demodulator is used for the demodulation of downlink signal and receives the control information that relates to shared channel;
Data channel demodulator is used for the signal that demodulation receives from radio channel and exports grouped data; And
The data demodulates controller, be used to control the reception of dedicated channel and when determining on described shared channel, to transmit the data of described MS, control the signal that described data channel demodulator comes demodulation to receive from described shared channel according to the result who receives described control information.
24. equipment according to claim 23, wherein said control channel demodulator further are configured to receive the message that indicates whether to support described shared channel from described BS.
25. equipment according to claim 23 wherein is determined when being initial transmission packet when the described data that will transmit, described data demodulates controller further is configured to receive described data in the starting point of frame boundaries.
26. equipment according to claim 25, wherein said wireless communication system is supported mixed automatic retransmission request (HARQ).
27. equipment according to claim 25, wherein said data comprise internet protocol voice (VoIP) grouping.
28. a mobile radio station (MS) that is used at wireless communication system transmits the method for data, comprising:
(BS) receives the distribution of the dedicated channel that is used for the data transmission from the base station;
Monitor shared control channel and receive and be used for the control information that data transmit;
By described control information, determine whether to distribute the resource of described dedicated channel to different user MS; And
When the resource allocation of described different user MS comprises persistent resource allocation, use the surplus resources that obtains by the resource of from the resource of described dedicated channel, getting rid of described persistent resource allocation to carry out described data and transmit.
29. method according to claim 28 further comprises:
When the described resource allocation of described different user MS does not comprise described persistent resource allocation, carry out described data transmission by the surplus resources that the use resource that eliminating temporarily distributes to described different user MS from the resource of described dedicated channel obtains.
30. one kind is used at wireless communication system from mobile radio station (MS) comprising to the equipment that base station (BS) transmits data:
The control channel demodulator is used for the demodulation of downlink signal and receives the control information that relates to shared channel;
The data channel modulator is used to modulate the signal that will be sent to radio channel and exports described modulated signal; And
The data-modulated controller, be used for determining whether resource into different user MS assigned with dedicated channel according to the result who receives described control information, and when the resource allocation of described different user MS comprises described persistent resource allocation, control described data channel modulator and come actual figure reportedly to send to use the surplus resources that obtains by the resource of from the resource of described dedicated channel, getting rid of persistent resource allocation.
31. equipment according to claim 30, wherein when the described resource allocation at described different user MS did not comprise described persistent resource allocation, the surplus resources that the resource that described data-modulated controller control data channel modulator temporarily distributes to described different user MS by eliminating from the resource of described dedicated channel with use obtains came actual figure reportedly to send.
32. a mobile radio station (MS) that is used at wireless communication system transmits and receives the method for data, comprising:
Reception is used for the distribution of the dedicated channel of (BS) reception data from the base station;
Monitor shared control channel and receive the control information that is used for data transmission;
By control information determine resource that whether resource of described dedicated channel distribute to different user MS or shared channel whether additional allocation give himself;
When determining on described shared channel, to transmit the data of described MS, on described dedicated channel and described shared channel, receive the data that transmit from BS according to the result who receives described control information; And
When determining that according to the result who receives described control information described different user MS distributes some resources of described dedicated channel, the surplus resources that the resource that use distributes to described different user MS by eliminating from the resource of described dedicated channel obtains to transmit data to BS on described dedicated channel.
33. method according to claim 32 further comprises:
When the resource allocation at described different user MS comprises persistent resource allocation, use the surplus resources that obtains by the resource of from the resource of described dedicated channel, getting rid of described persistent resource allocation to carry out described data and transmit; And
When the resource allocation at described different user MS does not comprise described persistent resource allocation, use the resource of temporarily distributing to obtain surplus resources and carry out described data transmission to described different user MS by eliminating from the resource of described dedicated channel.
34. a mobile radio station that is used in wireless communication system transmission/reception data comprises:
The control channel demodulator is used for the demodulation of downlink signal and receives the control information that relates to shared channel;
The data channel modulator is used to modulate the signal that will be sent to radio channel and exports described modulated signal;
Data channel demodulator is used for the signal that demodulation receives from radio channel and exports grouped data;
The data-modulated controller, be used for determining by described control information whether the resource of shared channel is assigned to himself extraly, and as result according to the described control information of reception, when some resources of described dedicated channel are assigned to described different user MS, use by from the resource of described dedicated channel, getting rid of surplus resources that the resource of distributing to described different user MS obtains and come that actual figure reportedly send on described dedicated channel; And
The data demodulates controller, be used for determining whether to distribute the resource of described dedicated channel to different user MS by described control information, and when determining on described shared channel, to transmit the data of described MS, on described dedicated channel and described shared channel, carry out Data Receiving according to the result who receives described control information.
35. mobile radio station according to claim 34, wherein when the resource allocation at described different user MS comprised described persistent resource allocation, described data demodulates controller was controlled described data channel modulator and is used the surplus resources that obtains by the resource of getting rid of persistent resource allocation from the resource of described dedicated channel to carry out described data transmission.
36. mobile radio station according to claim 34, wherein when the resource of distributing at described different user MS does not comprise described persistent resource allocation, described data demodulates controller is controlled described data channel modulator and is used by get rid of surplus resources that the resource of temporarily distributing to described different user MS obtains from the resource of described dedicated channel and carry out described data and transmit.
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KR1020060029938A KR100929077B1 (en) 2005-08-09 2006-03-31 Methdo and apparatus for allocating communication resources using virtual circuit switching in a wireless communication system and method for transmitting/receiving data in a mobile station
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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