CN1839595B - Method and device for allocating radio resources in wireless portable network system - Google Patents
Method and device for allocating radio resources in wireless portable network system Download PDFInfo
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- CN1839595B CN1839595B CN2004800236288A CN200480023628A CN1839595B CN 1839595 B CN1839595 B CN 1839595B CN 2004800236288 A CN2004800236288 A CN 2004800236288A CN 200480023628 A CN200480023628 A CN 200480023628A CN 1839595 B CN1839595 B CN 1839595B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Information for different subscribers of a service with the same modulation and channel encoding method is transmitted by allocating radio resources in a wireless portable Internet system. Also, identifier information on the subscriber of a concurrently allocated radio resource is transmitted through common control information. Therefore, information for a plurality of subscribers coexists in a single radio resource block, and it can be easily transmitted. Since a subscriber station which has received downlink information can know to which radio resource block the information for the corresponding station is allocated through the subscriber identifier information transmitted as common control information, the subscriber station can access desired information by accessing a specific radio resource block to which information for the subscriber is allocated in the received frame.
Description
Technical field
The present invention relates to a kind of in wireless portable network system the method and apparatus of distributing radio resource.Particularly, the present invention relates to a kind of wireless resource allocation methods and equipment, it is used for when the resource in the wireless portable network system allocation of downlink, by distributing radio resource and send user profile and visit Radio Resource and the retrieving information that has distributed the grouped data at relative users station to it.
Background technology
Wireless portable internet (wireless portable Internet) is the next generation communication method, and it is used for the further mobility of the short range data communication means of support such as the such use fixed access point of traditional WLAN.
Proposed the various standards of wireless portable internet, and the international standard of portable internet has developed into and has concentrated on the IEEE 802.16e.
Fig. 1 illustrates the sketch of wireless portable internet.
Wireless portable internet system comprises: SS (user terminal) 10; Base station 20 and 21, it is used for carrying out radio communication with SS 10; Router three 0 and 31, it is connected to the base station by gateway; And the Internet.
Provide data communications method such as traditional IEEE 802.11 such WLAN methods, be used to allow short scope radio communication with reference to fixed access point, and it does not provide the mobility of SS, is that the basis is with the short range data communication of wireless mode support but substitute with the cable.
Be subjected to 802.16 groups of wireless portable internet systems that drive of IEEE to guarantee mobility, and when another sub-district of the SS shown in Fig. 1 10 20 management from the base station is moved toward the sub-district of base station 21 management, provide seamless data communication services.
IEEE 802.16 supports MAN (metropolitan area network) basically, and expression covers the communication network of the zone line between LAN and the WAN.
So wireless portable internet system is supported the switching of SS 10 in the mode identical with the mobile communication service manner, and according to the mobile distribution dynamic IP addressing of SS.
In this example, SS communicates by letter with 21 with base station 20 by OFDMA (orthogonal frequency division multiple access) method, OFDMA is the multiplexing method that has made up FDM (frequency division multiplexing) method and TDM (time division multiplexing) method, and the FDM method uses the subcarrier of a plurality of orthogonal frequencies as a plurality of subchannels.The OFDMA method prevents the fade-out of the generation on the multipath basically, and has High Data Rate.
And IEEE 802.16 has adopted AMC (adaptive modulation and coding) method, and it is used for selecting modulation and coding method adaptively according to the acceptance between request and SS 10 and base station 20 and 21.
Fig. 2 illustrates the hierarchical organization of wireless portable internet system.
The hierarchical organization of the wireless portable internet system of IEEE 802.16e generally is divided into physical layer L10 and MAC (media interviews control) layer L21, L22 and L23.
Physical layer L10 carries out the radio communication function of carrying out on conventional physical, for example modulate, separate to be in harmonious proportion and encode.
Wireless portable internet system does not have the layer according to their functional classification, but allows single MAC layer to carry out the various functions different with the wired internet system.
About the sublayer according to function, the MAC layer comprises privacy sublayer L21, MAC common part sublayer L22 and service specific convergence sublayer L23.
Service specific convergence sublayer L23 carries out payload header decompression will function and QoS mapping function under the situation of continuous data communication.
MAC common part sublayer L22 is the core of MAC layer, its executive system access function, allocated bandwidth function, connection foundation and maintenance function and QoS management function.
Privacy sublayer L21 actuating equipment authentication functions, security key exchange function and encryption function.Device authentication is carried out by privacy sublayer L21, and subscription authentication is carried out by the upper strata (not shown) of MAC.
Fig. 3 is illustrated in the sketch of BS (base station) in the wireless portable internet system and the configuration of the connection between the SS.
Between the MAC of the MAC of SS layer and BS layer, has connection C1.
What connect that C1 represents at this term of the present invention is not physical connection relation but logic connecting relation, and it is defined in mapping relations between the MAC peer-to-peer of SS and BS so that send the business of single service flow.
So, represent function between the MAC peer-to-peer with respect to the parameter that connects the C1 definition or message, and in fact, described parameter or message is processed, be converted framing and be sent out by physical layer, and described frame is resolved, and carries out the function corresponding to described parameter or message on the MAC layer.
MAC message comprises various message, is used for carrying out for various request of operating REQ, response RSP and affirmation ACK.
Fig. 4 illustrates the frame figure of the resource allocation that is used for illustrating legacy wireless communication system.
When distributing Radio Resource when the burst characteristic of utilizing grouped data and for transfer of data, the conventional cellular systems that is used for transmitted in packets so that effectively use Radio Resource, rather than is used for random user with dedicated channel with shared channel mode distributing radio resource.So, even a Radio Resource can send grouped data for a plurality of users.And, because subscriber station receives and to be used to distinguish from the user's of mobile communications network unique identifier and to receive a plurality of services with different QoS (service quality) simultaneously, so it receives CD (connection identifier (CID) and distinguishes the service that a user can receive simultaneously.
About the resource allocation map in the OFDMA system shown in Fig. 4, the trunnion axis indication is according to the symbol of time-division, and vertical axis represents to comprise the subchannel of a plurality of subcarriers.Come Radio Resource WM1 in the distribution system to WM9 with square form.Prior art suggestion usually is used for the method to WM9 to user's distributing radio resource WM1 for two kinds.
Fig. 5 illustrates the conventional wireless resource allocation methods.
First prior art allow website access be assigned to described station as the Radio Resource of Radio Resource WM1 to the down link of WM9, and subscriber station information has 1: 1 mapping relations.Prior art advantageously provides easy visit and the low-power consumption of subscriber station to Radio Resource, but can not distribute efficient radio resource, this be because: because the subcarrier that sends on symbolic unit and the Radio Resource axle based on the data on the time shaft causes being difficult to the 2 dimensional region that accurately control distributed and the amount of grouped data with the partition characteristic of two-dimentional square structure assigned radio resource, so produce the null resource space that can not in the Radio Resource space, send data.
In other words, as shown in Figure 5, do not guarantee that the Radio Resource WMn that is assigned to the specific user station is full of grouped data P1 to P7, and have problem ground to lose corresponding to the resource of space S.
Fig. 6 illustrates another kind of conventional wireless resource allocation methods, wherein is dispensed on together with a plurality of services with different connection identifier (CIDs that offer subscriber station simultaneously about a plurality of users' information.
This conventional method will be in the two dimensional wireless resource space that is distributed data do not minimize and therefore with the maximizing efficiency of institute's assigned radio resource in the zone by its transmission, but when subscriber station SS receiving downlink, subscriber station can not detect the Radio Resource that has distributed the grouped data of subscriber station to it, thus subscriber station will visit all wireless resource block WM1 that are sent to down link to WM10 and retrieval about the information of each connection.
So this conventional method increases power consumption and is not suitable for the wireless portable internet subscriber station.In other words, above-mentioned prior art efficient in the use of Radio Resource is low and owing to big power consumption causes the mobility at limited subscriber station.
Summary of the invention
The invention has the advantages that provides a kind of Radio Resource that is used for by allocation of downlink, and send user profile simultaneously, visit has distributed the Radio Resource of the grouped data that is used for the relative users station to it, and retrieving information in the portable wireless system allows the low-power consumption of mobile subscriber station and increases the effect that battery uses.
Specifically, the service with identical modulation and channel coding method will have about the information of different user and have the service that the difference for a user is connected and be combined into single group, to its distributing radio resource, and they be sent.And, by the information of common control information transmission about the user identifier on institute's assigned radio resource.Therefore, can on single wireless resource block, load information about a plurality of users, it can be sent then, and which wireless resource block is the information that can detect about corresponding station by the subscriber identifier information that sends through common control information owing to the subscriber station with the downlink information that is received be assigned to, and distributed the particular radio resource piece of user profile to obtain the method and apparatus of information by visit to it at the frame that is received so the invention provides a kind of being used for.
In one aspect of the invention, a kind of in portable wireless network (wireless portablenetwork) system the method for allocation of downlink Radio Resource, comprising: modulation and the chnnel coding grade of (a) determining each Radio Resource according to characteristics of radio channels; (b) generation is about the subscriber station information of Radio Resource; (c) with described subscriber station information mapping to common control information; And (d) to down link transmission institute's assigned radio resource and common control information.
Step (c) comprising: the modulation and the chnnel coding class information of each Radio Resource are mapped to common control information; And each Radio Resource is mapped to common control information based on the time with based on the offset information of frequency.
Subscriber station information comprises about the identifier information of the subscriber station of visiting each Radio Resource with about the information of the number of subscriber station.
In another aspect of the present invention, a kind of method that is used in Radio Network System visit downlink radio resource: (a) allow subscriber station to receive Radio Resource and storage common control information piece about the subscriber station information of Radio Resource; (b) the corresponding subscriber station identifier of retrieval in the common control information piece; (c) from common control information, read the modulation and the chnnel coding grade of respective wireless resource, and determine to separate mediation channel-decoding grade corresponding to the subscriber station identifier of being retrieved; (d) check corresponding radio resource according to common control information corresponding to the subscriber station identifier of being retrieved; And (e) be in harmonious proportion Radio Resource that the channel decoding method visit checked and receive data message corresponding to subscriber station with determined separating.
Step (d) comprise from common control information, read corresponding radio resource based on the offset information of symbol with based on the offset information of subcarrier.
In another aspect of the present invention, a kind of base station equipment that is used in the wireless portable network system distributing radio resource, comprise: base station controller, it comprises the allocation of radio resources device, be used for using the down link data of the subscriber station of identical modulation and chnnel coding grade, and will be mapped to the common control information piece about the information of subscriber station and modulation and chnnel coding class information to single allocation of radio resources; The digital signal transmitter, it utilizes the same modulation of appointment and chnnel coding grade to modulate the assigned radio resource with chnnel coding allocation of radio resources device institute; With the analog signal transmitter, it is used for converting the digital signal of modulate and chnnel coding to analog signal, and sends this analog signal to subscriber station.
The allocation of radio resources device comprises: the modulation levels determiner, it determines to be assigned to the modulation levels of the data of Radio Resource according to characteristic of wireless channel, and with this grade information mapping to the common control information piece; Chnnel coding grade determiner, it determines to be assigned to the chnnel coding grade of Radio Resource according to the characteristic of wireless channel, and with this grade information mapping to the common control information piece; The subscriber station determiner, its user identifier that will be assigned to Radio Resource is mapped to public controll block; With the skew determiner, it determines position and the size of Radio Resource on frame by symbol offset and sub-carrier offset, and this offset information is mapped to the common control information piece.
In another aspect of the present invention, a kind of customer station equipment of visiting Radio Resource in wireless portable network system comprises: receiver of the analog signal, and it receives analog wireless signals and converts them to digital signal; Station control, it comprises the common control information reader, is used to read the common control information that is sent, and is used to retrieve the information about the Radio Resource that will be visited by customer station equipment; And digit signal receiver, be used for separating the mediation channel-decoding according to carrying out by the modulation of the Radio Resource of common control information reader retrieves and chnnel coding grade, and receiving data information.
The common control information reader comprises: the subscriber station identifier searcher is used for retrieving the wireless resource information that comprises subscriber station identifier from the common control information piece; Modulation and decoding grade reader are used for the modulation and the coding class information of the Radio Resource retrieved; With the offset information reader, be used to read the Radio Resource retrieved based on the offset information of symbol with based on the offset information of subcarrier.
Description of drawings
Be included in the specification and constitute the accompanying drawing diagram embodiments of the invention of the part of specification, and be used from together with declaratives one and explain principle of the present invention.
Fig. 1 illustrates the sketch of wireless portable internet;
Fig. 2 illustrates the hierarchical organization of wireless portable internet system;
Fig. 3 is illustrated in the sketch of BS in the wireless portable internet system and the configuration of the connection between the SS;
Fig. 4 illustrates the frame figure of the resource allocation that is used for illustrating legacy wireless communication system;
Fig. 5 illustrates the conventional wireless resource allocation methods;
Fig. 6 illustrates another kind of conventional wireless resource allocation methods;
Fig. 7 illustrates wireless resource allocation according to a preferred embodiment of the invention;
Fig. 8 illustrates the allocation plan of common control information piece according to a preferred embodiment of the invention
Fig. 9 illustrates the allocation plan of the base station in according to a preferred embodiment of the invention the allocation of radio resources device;
Figure 10 illustrates the allocation plan of the wireless resource allocation unit of base station according to a preferred embodiment of the invention;
Figure 11 illustrates the allocation plan at the station of allocation of radio resources device according to a preferred embodiment of the invention;
Figure 12 illustrates the block diagram of common control information reader according to a preferred embodiment of the invention;
Figure 13 illustrates the flow chart of wireless resource allocation methods according to a preferred embodiment of the invention; With
Figure 14 illustrates the flow chart of the method for subscriber station visit downlink radio resource according to a preferred embodiment of the invention.
Embodiment
In being discussed in more detail below, only carrying out the best mode that inventor of the present invention thought and only illustrate and describe the preferred embodiments of the present invention by diagram.As will being implemented, the present invention can various tangible aspect on be modified, and all such modifications do not depart from the present invention.Correspondingly, to be considered to be illustrative and not restrictive in itself for accompanying drawing and description.In order to make the present invention clear, the part that does not have to describe in specification is omitted, and the part that is provided similar description has identical Reference numeral.
Describe according to a preferred embodiment of the invention wireless resource allocation methods and equipment with reference to the accompanying drawings in detail.
Fig. 7 illustrates wireless resource allocation according to a preferred embodiment of the invention.
Radio Resource according to a preferred embodiment of the invention comprises that the two dimensional wireless Resource Block WM1 of square form is to WM8 and the common control information piece (CI) that comprises about the information of institute's assigned radio resource.
As described, wireless resource block WM1 is formed the two-dimensional structure of subcarrier and time-division symbol to WM8 and common control information piece (CI).Wireless resource block WM1 has identical modulation and chnnel coding grade to WM8, and comprises the information on services about a plurality of subscriber stations.Therefore, each wireless resource block WM1 comprises user identifier respectively to WM8.For example, wireless resource block WM5 comprises a plurality of user identifier SSID# 1, SSID# 3, SSID# 7, SSID# 8.
Common control information piece (CI) comprises the information to WM8 about each wireless resource block WM1 included in the frame.For example, public information control information M1 shows the included state of Radio Resource WM1 to the user totem information of WM8 that be assigned to M8, and the public information control information M5 that comprises user totem information has the information of radio resource allocation about Radio Resource WM5.
So subscriber station can receiving common control information piece (CI), the wireless resource information of retrieval expectation, and visit corresponding radio resource.
In its actual realization, owing to need the processing time, so the Radio Resource WM1 that receives simultaneously with the common control information piece can be cushioned in the station in the situation of Fig. 7, and the performance that depends on the station can cushion Radio Resource WM2, WM3 and WM4, till the station receives the information of common control information piece (CI) and reads corresponding information.This buffering course may increase the size of the required buffering area in station fully, for example, read the Resource Block that is distributed that begins to visit the station after the common control information piece owing to stand in to finish, have loss on the processing time so in Radio Resource WM1, have the standing in of institute's assigned radio resource piece at station.And, may increase the size of the common control information piece of the user totem information that comprises Radio Resource, this may be unfavorable for effective utilization of Radio Resource.Therefore, the receiver of standing can be considered up to reading the required processing time of common control information piece, and it can be not included in the user totem information about the part of one of the front of downlink radio resource in the common control information piece and this user totem information is included in the Radio Resource of back (the Radio Resource WM5 in Fig. 7 situation is to WM8), and they are sent.
In the case, the receiving common control information piece of standing, read them, check the state of included user totem information, visit does not comprise the wireless resource block of user totem information, whether retrieval provides to it and is sent out the down link data that arrives at a station, and reads the user totem information of the wireless resource block of the user totem information that comprises the respective wireless resource in the common control information piece, and retrieval is assigned to the wireless resource block at station thus.
And, in above-mentioned example, when the station before known included about be included in the common control information piece about the state of wireless resource allocation information the time (for example, if such rule is known at the station, promptly be not included in the common control information piece to the user totem information of WM4) about Radio Resource WM1, arrive under the situation of WM4 at WM1, the receiving of standing erectly ask Radio Resource WM1 to WM4 so that find the wireless resource block (need not from the common control information piece, to read user totem information) that is assigned to the station, and under the situation of WM8, stand visits the wireless resource block that is assigned to the station according to each resource WM5 that is assigned to by the acquisition of public information controll block to the user totem information of WM8 at WM5.
Fig. 8 illustrates the allocation plan of common control information according to a preferred embodiment of the invention.
The common control information of Radio Resource WM5 comprises modulation and chnnel coding class information F1, symbol and subchannel offset information F2, user identifier information of number F3 and the subscriber identifier information F4 of corresponding radio resource.
The modulation of Radio Resource and chnnel coding class information F1 comprise common modulation and the chnnel coding information of corresponding radio resource WM5.As mentioned above, come distributing radio resource based on same modulation and chnnel coding information.
Symbol and subchannel offset information F2 comprise the information about vertical axis and the trunnion axis of corresponding radio resource WM5, and it provides about the positional information corresponding to the Radio Resource WM5 of the skew of symbol and subchannel thus.
The number of the subscriber station of Radio Resource WM5 is used in user identifier information of number F3 indication.
Subscriber identifier information F4 comprises the identifier of the subscriber station that uses Radio Resource WM5.
Therefore, the subscriber station of down link is by broadcast channel receiving common control information piece (CI), and retrieval provides the Radio Resource of the user identifier of subscriber station to it.When finding when it provides the Radio Resource of user identifier of subscriber station, subscriber station reads position and the modulation and the chnnel coding information of Radio Resource, and visit is assigned to the Radio Resource of subscriber station.As shown in Figure 7, because Radio Resource comprises the user identifier about the information of a plurality of services, so subscriber station can receive the information on services of the user identifier that comprises subscriber station from the Radio Resource that subscriber station is visited.
Fig. 9 illustrates the allocation plan of the base station 100 in according to a preferred embodiment of the invention the allocation of radio resources device.
Allocation of radio resources device 120 in Radio Resource single distributes the user that uses same modulation and chnnel coding and has the service of different connection identifier (CIDs so that meet the QoS of the grouped data that will be sent to down link in same user.And, the grouped data that allocation of radio resources device 120 distributes each user to modulation that system allowed and each wireless resource block in the chnnel coding grade in an identical manner.The user profile of being distributed and the modulation of Radio Resource and chnnel coding information are mapped to the common control information piece.
By using wireless resource block that analog signal transmitter and receiver 140 modulate and encode institute by sending to subscriber station in the air.
Figure 10 illustrates the allocation plan of the wireless resource allocation unit of base station according to a preferred embodiment of the invention.
Allocation of radio resources device 120 comprises modulation levels determiner 122, chnnel coding determiner 123, subscriber station determiner 124, symbol and subchannel offset determiner 125 and controller 121.
Modulation levels determiner 122 selects same modulation levels with the chnnel coding grade and according to qos policy they to be dispensed to identical Radio Resource with chnnel coding determiner 123.For example, they select QPSK, 16-QAM and 32-QAM as modulation levels according to the characteristic (for example, SNR (signal to noise ratio)) of the physical channel of down link, and select BTC, CTC or RM coding method as the chnnel coding grade.Modulation levels determiner 122 and chnnel coding determiner 123 are mapped to determined modulation and chnnel coding class information in the common control information piece.
Symbol and subchannel offset determiner 125 by on the fixed time axle based on the skew of symbol and the frequency axis based on the skew of subchannel (perhaps based on subcarrier), come the two-dimensional position and the size of institute's assigned radio resource on the designated frame.Provide skew unit on the frequency axis with subchannel in a preferred embodiment, and can provide skew unit on the frequency axis with subcarrier.Offset information is mapped to the common control information piece so that the positional information of the Radio Resource that is assigned to subscriber station is provided thus.
Thereby controller 121 control modulation levels determiners 122, chnnel coding determiner 123 and subscriber station determiner 124 control wireless distribution.
Figure 11 illustrates the allocation plan at the station 200 of allocation of radio resources device according to a preferred embodiment of the invention.
Stand and 200 comprise station control 210, digital signal transmitter and receiver 230 and analog signal transmitter and receiver 240.Station control 210 comprises common control information reader 220.Digital signal transmitter and receiver 230 comprise transmitter 231 and the receiver 232 that is used to send with receiving digital signals.
Common control information reader 220 reads the common control information that is sent to all stations by broadcast channel, and the Radio Resource of retrieval expectation.Station control 230 is according to the control figure sender unit and the receiver 230 as a result of reading of common control information reader 220, and is in harmonious proportion the data that channel decoding method comes demodulation sign indicating number Radio Resource by suitable separating.
Figure 12 illustrates the block diagram of common control information reader according to a preferred embodiment of the invention.
Common control information reader 220 comprises subscriber station identifier searcher 221, modulation and coding grade reader 222, offset information reader 223 and data information retrieval device 224.
When receiving the common control information piece, the subscriber station identifier searcher 221 of the 200 use common control information readers 220 of standing is retrieved the Radio Resource whether subscriber station identifier with station 200 is provided in the common control information piece.
When finding the Radio Resource of the identifier that comprises station 200, modulation and coding grade reader 222 read the modulation and the coding class information of corresponding radio resource from the common control information piece.This modulation and coding class information are sent to the receiver of digit emitter and receiver, and are used to this Radio Resource of demodulation sign indicating number.
Offset information reader 223 reads skew based on the subchannel skew of subcarrier (or based on) and based on the skew of symbol, and detects the position of institute's assigned radio resource.
When finding the position of Radio Resource, retrieval has the data message of the user identifier of data information retrieval device 224 in a plurality of user's data information of data information retrieval device 224 from Radio Resource.Station control 210 control stations are so that visit Radio Resource and the data message of distributing to station control 210.
According to above-mentioned configuration, stand and analyze information about the public controll block of characteristic with broadcast message, check whether provide the Radio Resource that is assigned to the station, obtain the modulation and the coding class information of corresponding radio resource, and come demodulation sign indicating number corresponding radio resource with suitable grade.Therefore, stand do not need to check the Radio Resource that sends to some extent, and Radio Resource is suitably managed so that accord with Q oS strategy and do not waste power consumption.
Figure 13 illustrates the flow chart of wireless resource allocation methods according to a preferred embodiment of the invention.
In step S10, the base station obtains the characteristics of radio channels of down link by the MAC message (for example, channel descriptor message) of the characteristic of description physical layer.
In step S11, modulation and chnnel coding grade are determined according to the characteristic adaptation ground of the physical layer that obtains by MAC message in the base station.For example, determine modulation and chnnel coding grade according to the SNR that in physical layer, obtains.
When having determined modulation and chnnel coding grade, in step S12, distribute Radio Resource corresponding to modulation and chnnel coding grade.This Radio Resource is determined based on the skew of symbol with based on the skew of subchannel (or based on subcarrier), and position on definite frame and size.
When having distributed Radio Resource, in step S13, generate and be mapped to the common control information piece about the user profile of institute's assigned radio resource and with it.When the user profile about allocation of radio resources and Radio Resource is mapped to the common control information piece, in step S14, grouped data is generated as frame, and this frame is sent to down link.
Figure 14 illustrates the flow chart of the method for subscriber station visit downlink radio resource according to a preferred embodiment of the invention.
When receiving the common control information piece of the broadcast channel transmission of passing through down link, subscriber station is retrieved the user identifier whether subscriber station is provided in public controll block in step S20.Public controll block comprises the user profile about each Radio Resource that distributes according to same modulation and chnnel coding grade.
*When finding the public controll block of the user identifier that comprises subscriber station, subscriber station reads modulation and the chnnel coding grade corresponding to the Radio Resource of common control information piece in step S21, and selects separating of subscriber station to be in harmonious proportion the channel-decoding grade so that receive modulation and chnnel coding grade.
When retrieving user identifier, the subscriber station inspection is shone upon the position and the size of Radio Resource of the information at corresponding station to it in step S22.
When having distributed the Radio Resource that is assigned to subscriber station, subscriber station visits Radio Resource according to the selected mediation channel decoding method of separating in step S23, and retrieval is assigned to the data at corresponding station, and receives this data.
As known to from the above embodiments, so owing to come distributing radio resource to prevent losing of Radio Resource based on same modulation and chnnel coding grade.The initial receiving common control information of subscriber station obtains the information about Radio Resource, obtains the information of the Radio Resource of visiting about subscriber station, and visits this Radio Resource.Therefore, so owing to need not to visit all Radio Resources and saved power consumption, and the height mobility in the wireless Internet system of battery is used in this power consumption support usually.
Although described the present invention about being considered to the most practical and preferred embodiment at present, but should be understood that and the invention is not restricted to the disclosed embodiments, on the contrary, be intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims.
According to above-mentioned configuration, when the Radio Resource of allocation of downlink, user profile is sent to the common control information piece, corresponding subscriber station visit has distributed the Radio Resource of the grouped data of subscriber station to it, and the information of retrieval expectation, therefore, allow the low-power consumption of mobile subscriber station so that thus with the service efficiency maximization of battery.
Claims (11)
1. one kind is used in the method for orthogonal frequency division multiple access communication system to the assignment information of user terminal transmission downlink radio resource, and described method comprises:
In the descending chain circuit frame of the subchannel of symbol that comprises predetermined number and predetermined number, to the part mapping of the common control information piece of downlink radio resource assignment information corresponding at least one user terminal of the wireless resource block of described Radio Resource; And
In the duration of described descending chain circuit frame, described common control information piece is sent to described at least one user terminal;
Wherein said assignment information comprises:
At least one identifier of described at least one user terminal and the number of described at least one user terminal;
The symbol offset information of the two-dimensional position of wireless resource block described in the indicating downlink isl frame and subchannel offset information; And
The modulation of corresponding radio resource and chnnel coding information.
2. the method for claim 1, wherein when described descending chain circuit frame comprises a plurality of wireless resource block, to the part mapping of described common control information piece assignment information corresponding at least one user terminal of a wireless resource block, and not to the part mapping of the described common control information piece assignment information corresponding at least one user terminal of all the other wireless resource blocks.
3. the method for a user terminal access downlink radio resource in the orthogonal frequency division multiple access communication system, described method comprises:
In the descending chain circuit frame of the subchannel of symbol that comprises predetermined number and predetermined number, reception comprises the common control information of a plurality of assignment information of a plurality of wireless resource blocks, and each of wherein said a plurality of assignment information comprises: at least one identifier of at least one user terminal and the number of described at least one user terminal; And the symbol offset information and the subchannel offset information of the two-dimensional position of wireless resource block in the indicating downlink isl frame, and the modulation of corresponding radio resource and chnnel coding information;
Search is corresponding to the assignment information of the identifier of this user terminal in described a plurality of assignment information; And
By using symbol offset information and subchannel offset information, visit the wireless resource block in described a plurality of wireless resource block corresponding to described searched assignment information.
4. method as claimed in claim 3 wherein will be dispensed to described at least one user terminal corresponding in described a plurality of wireless resource blocks of at least one assignment information in the described descending chain circuit frame.
5. method as claimed in claim 3, wherein said common control information comprise a plurality of assignment information that are used for the described a plurality of wireless resource blocks of part.
6. one kind is used at the device of orthogonal frequency division multiple access communication system to the assignment information of user terminal transmission downlink radio resource, and described device comprises:
The allocation of radio resources device is used at the descending chain circuit frame of the subchannel of symbol that comprises predetermined number and predetermined number to the part mapping of the common control information piece of the downlink radio resource assignment information corresponding at least one user terminal of the wireless resource block of described Radio Resource; With
Transmitter is used in the duration of descending chain circuit frame described common control information piece being sent to described at least one user terminal;
Wherein said assignment information comprises:
At least one identifier of described at least one user terminal and the number of described at least one user terminal;
The symbol offset information of the two-dimensional position of wireless resource block described in the indicating downlink isl frame and subchannel offset information; And
The modulation of corresponding radio resource and chnnel coding information.
7. device as claimed in claim 6, wherein when described descending chain circuit frame comprises a plurality of wireless resource block, to the part mapping of described common control information piece assignment information corresponding at least one user terminal of part wireless resource block, and not to the part mapping of the described common control information piece assignment information corresponding at least one user terminal of all the other wireless resource blocks.
8. the method for an allocation of downlink Radio Resource in the orthogonal frequency division multiple access communication system, described method comprises:
To distribute to frame corresponding to modulation of determining according to the characteristics of radio channels of described down link and the definite wireless resource block of chnnel coding grade;
The common control information piece is distributed to described frame;
In the descending chain circuit frame of the subchannel of symbol that comprises predetermined number and predetermined number, to the assignment information of described common control information piece mapping, wherein corresponding at least one user terminal of described wireless resource block
When the assignment information with described at least one user terminal was mapped to described common control information piece, described assignment information comprised the symbol offset information of the two-dimensional position of wireless resource block described in the number, the described descending chain circuit frame of indication of at least one identifier of described at least one user terminal and described at least one user terminal and the modulation and the chnnel coding information of subchannel offset information and corresponding radio resource.
9. method as claimed in claim 8, wherein when described descending chain circuit frame comprises a plurality of wireless resource block, to the assignment information of described common control information piece mapping corresponding at least one user terminal of part wireless resource block, and not to the assignment information of described common control information piece mapping corresponding at least one user terminal of all the other wireless resource blocks.
10. the method for an allocation of downlink Radio Resource in the orthogonal frequency division multiple access communication system, described method comprises:
In the descending chain circuit frame of the subchannel of symbol that comprises predetermined number and predetermined number, distribution is corresponding to modulation of determining according to the characteristics of radio channels of described down link and the definite a plurality of wireless resource blocks of chnnel coding grade, and these a plurality of wireless resource blocks comprise first wireless resource block that is used at least one first user terminal and second wireless resource block that is used at least one second user terminal;
The common control information piece is distributed to described frame; And
In described descending chain circuit frame, will be mapped to the common control information of common control information piece corresponding to the assignment information of described at least one first user terminal of first wireless resource block;
Wherein said assignment information comprises:
At least one identifier of described at least one first user terminal and the number of described at least one first user terminal;
The symbol offset information of the two-dimensional position of first wireless resource block described in the indicating downlink isl frame and subchannel offset information; And
The modulation of corresponding radio resource and chnnel coding information.
11. method as claimed in claim 10 wherein is not mapped to the common control information piece with the assignment information of described at least one second user terminal.
Applications Claiming Priority (7)
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| KR10-2003-0049117 | 2003-07-18 | ||
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| KR10-2004-0027469 | 2004-04-21 | ||
| KR1020040027469A KR100684305B1 (en) | 2003-07-18 | 2004-04-21 | A method for allocating radio resource in wireless system and apparatus thereof |
| KR1020040027469 | 2004-04-21 | ||
| PCT/KR2004/001781 WO2005008360A2 (en) | 2003-07-18 | 2004-07-16 | Method and device for allocating radio resources in wireless portable network system |
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| KR100810361B1 (en) * | 2005-09-15 | 2008-03-07 | 삼성전자주식회사 | Method for generating a frame in an orthogonal frequency division multiple access communication system |
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| KR101296056B1 (en) * | 2006-11-14 | 2013-08-12 | 삼성전자주식회사 | Method for decoding resource information in wireless communication system |
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| KR101441679B1 (en) * | 2007-03-29 | 2014-09-18 | 삼성전자주식회사 | Apparatus and method for transmitting/receiving resource assignment information in communication system |
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Also Published As
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| CN1839595A (en) | 2006-09-27 |
| KR20050009663A (en) | 2005-01-25 |
| ATE532296T1 (en) | 2011-11-15 |
| KR100684305B1 (en) | 2007-02-16 |
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