CN101808411A

CN101808411A - Method and device for mapping resources of control channel in communication system

Info

Publication number: CN101808411A
Application number: CN200910004180A
Authority: CN
Inventors: 关艳峰; 夏薇; 方惠英; 刘颖
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-02-16
Filing date: 2009-02-16
Publication date: 2010-08-18
Anticipated expiration: 2029-02-16
Also published as: CN103178948A; CN101808411B; CN103178948B

Abstract

The invention discloses a method for mapping resources of a control channel in a communication system. The method comprises the following steps of: differing a process of mapping resources of a subframe of a broadcast control channel from a process of mapping resources of a subframe of a non-broadcast control channel; and instructing the process of mapping resources of the subframe of the non-broadcast control channel through control information in the broadcast control channel. The technical scheme solves the problems of occupying resource positions by a synchronization channel and the broadcast control channel and modes, simplifies the process that a terminal identifies the broadcast control channel and ensures frequency spectrum efficiency of a wireless communication system based on OFDMA technology through the design scheme of the control channel.

Description

The method for mapping resource of control channel and device in the communication system

Technical field

The present invention relates to the communications field, relate in particular to the method for mapping resource and the device of control channel in a kind of communication system.

Background technology

OFDM (Orthogonal Frequency Division Multiplexing abbreviates OFDM as) technology is the high speed transmission technology under a kind of wireless environment, and its pulse duration by the spread ofdma symbol improves the performance of anti-multipath decline.The realization principle of OFDM technology is: high-speed serial data is transformed into the parallel data of the relative low speed of multichannel, and this multidiameter delay data-modulated is transmitted to mutually orthogonal subcarrier.It is on the basis of OFDM technology that OFDM inserts (Orthogonal Frequency Division Multiple Access abbreviates OFDMA as) technology, by making the different subcarrier of CU, realizes that multiple access inserts.

In wireless communication system, the base station is meant the equipment that functions such as initial access, professional transmission and resource management are provided for terminal, and usually, above-mentioned functions is realized by control channel and administrative messag in the base station.For example, system configuration information is determined in the base station, and the resource allocation information of base station during and the resource allocation information the during uplink of terminal to base station to the downlink transfer of terminal, the base station sends this system configuration information and resource allocation information by control channel to terminal, terminal at first receives this system configuration information and resource allocation information on the control channel of determining, and then carries out the reception and the transmission of data with the base station.

Below the control channel in the wireless communication system is described.

In wireless communication system, down control channel generally is divided into and comprises: synchronizing channel (Synchronization Channel, abbreviate SCH as), Broadcast Control Channel (Broadcast Control Channel, abbreviate BCCH as), unicast services control channel (Unicast Service Control Channel, abbreviate USCCH as), multicast service control channel (Multicast Service Control Channel abbreviates MSCCH as) etc.Wherein, SCH and BCCH are the unidirectional control channels of " a bit to multiple spot ", wherein, and the frequency when terminal initially inserts by SCH, temporal correction, and receiving unit system information; The base station sends necessary system configuration and control information by BCCH to terminal, and wherein, this system configuration and control information are used to indicate the control structure of whole system, have especially indicated the configuring condition of system resource.Unicast services control channel and multicast control channel major function are: the base station sends resource scheduling information and control information by these two control channels to terminal, for example, mix response message, power control information of automatic repeat requests (Hybrid Automatic Repeat Request abbreviates HARQ as) etc.

In the communication process of base station and terminal, terminal need be correctly decoded SCH and BCCH, and obtaining after necessary system configuration and the control information could access network, and further decode other control channel and data.Like this, than data channel, SCH and BCCH need satisfy high coverage rate and low error rate, still can correctly decode under abominable wireless channel environment guaranteeing; And, generally, require terminal to be correctly decoded SCH and BCCH with the shortest time delay, less with the scheduling time delay that guarantees time delay that terminal initial inserts and normal transmission.

The raising of the complexity of wireless communication system has caused the complexity of control channel higher, especially in wireless communication system based on the OFDMA technology, the two-dimentional running time-frequency resource that its Radio Resource is made up of time domain OFDM A symbol and subcarrier in frequency domain, its resource mapping need be carried out on time domain and frequency domain, mapping process is complicated, has improved the design difficulty based on control channel in the wireless communication system of OFDMA technology.

For example, wireless communication system is in order to provide higher transmission rate, is supported in to carry out overloading on the big bandwidth when operating frequently, how to design the position of control channel; Wireless communication system needs compatible another wireless communication system or need be with another wireless communication system coexistence the time, how to design control channel; How wireless communication system when having adopted unique networking technology and Anti-Jamming Technique, for example, when adopting partial frequency multiplexing (Fractional Frequency Reuse abbreviates FFR as) technology, designs control channel in order to reduce interference.

Summary of the invention

Consider the demand that exists in the correlation technique, based on the problem of the control channel how wireless communication system is set and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of method for mapping resource and device of control channel, to address the above problem.

The method for mapping resource of control channel in a kind of communication system is provided according to an aspect of the present invention.

Method for mapping resource according to control channel in the communication system of the present invention comprises: the resource mapping process of Broadcast Control Channel place subframe is different with the resource mapping process of non-Broadcast Control Channel place subframe; The resource mapping process of non-Broadcast Control Channel place subframe is indicated by the control information in the Broadcast Control Channel.

Wherein, Broadcast Control Channel comprises main Broadcast Control Channel and/or auxilliary Broadcast Control Channel.

Wherein, the OFDMA number of symbols that comprises in the subframe of Broadcast Control Channel place is determined by the length of the Cyclic Prefix that communication system adopts, perhaps adopt fixed value, wherein, the OFDMA number of symbols adopts fixed value to be meant: the length of the Cyclic Prefix that OFDMA number of symbols that comprises in the subframe of Broadcast Control Channel place and communication system adopt is irrelevant.

Wherein, the OFDMA number of symbols that Broadcast Control Channel takies is determined by the length of the Cyclic Prefix that communication system adopts, perhaps adopt fixed value, wherein, the OFDMA number of symbols that takies of Broadcast Control Channel adopts fixed value to be meant: the OFDMA number of symbols that Broadcast Control Channel takies has nothing to do with the length of the Cyclic Prefix that communication system adopts.

Wherein, the resource mapping process of Broadcast Control Channel place subframe is meant: the resource mapping process of the OFDMA symbol that Broadcast Control Channel takies in its place subframe.

Wherein, different being meant of resource mapping process of the resource mapping process of Broadcast Control Channel place subframe and non-Broadcast Control Channel place subframe: the resource mapping process of Broadcast Control Channel place subframe or Broadcast Control Channel place frequency partition is not indicated in control information.

Further, this method also comprises: the resource mapping process that sets in advance Broadcast Control Channel place subframe.

Wherein, the resource mapping process that sets in advance Broadcast Control Channel place subframe comprises: choose predetermined resource from the subframe of Broadcast Control Channel place, and predetermined resource is mapped as a frequency partition, wherein, predetermined resource all is mapped as the distributed logic Resource Unit, perhaps, predetermined resource is mapped as distributed logic Resource Unit and continous way logical resource unit; Wherein, the band width in physical that predetermined resource takies is less than or equal to minimum system bandwidth, and perhaps, the frequency difference in the predetermined resource between any two subcarriers is less than or equal to minimum system bandwidth.

Wherein, the resource mapping process of Broadcast Control Channel place frequency partition comprises: main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of frequency partition; Perhaps, main Broadcast Control Channel begins to take P distributed logic Resource Unit continuously to the direction of first distributed logic Resource Unit of frequency partition from last distributed logic Resource Unit of frequency partition; Wherein, P gets the fixed value that sets in advance, and perhaps, the value of P is determined one of at least by following information: the number of repetition that system bandwidth, base station type, main Broadcast Control Channel adopt.

Preferably, auxilliary Broadcast Control Channel takies the distributed logic Resource Unit, and the distributed logic Resource Unit that takies with main Broadcast Control Channel is adjacent or non-conterminous; If the distributed resource units that auxilliary Broadcast Control Channel takies is non-conterminous with the distributed logic Resource Unit that main Broadcast Control Channel takies, assist the quantity and/or the position of the distributed logic Resource Unit that Broadcast Control Channel takies by main Broadcast Control Channel indication; If the distributed logic Resource Unit that auxilliary Broadcast Control Channel takies is adjacent with the distributed logic Resource Unit that main Broadcast Control Channel takies, assist the quantity of the distributed logic Resource Unit that Broadcast Control Channel takies by main Broadcast Control Channel indication.

Wherein, one of at least predetermined resource is mapped as a frequency partition by following steps: sub-band division, the displacement of little band, frequency partition are divided, division, the subcarrier permutation of distributed resource units and continous way Resource Unit in the frequency partition.

Wherein, choosing predetermined resource comprises: with k physical resource unit in n the physical resource unit of communication system as predetermined resource, wherein, n physical resource unit is one of following: the primary synchronization channel occupied bandwidth corresponding physical Resource Unit of minimum system bandwidth corresponding physical Resource Unit, communication system arbitrarily in the total system bandwidth corresponding physical Resource Unit of communication system, the total bandwidth of communication system, wherein, n and k are natural number, and k is less than or equal to n.

Preferably, one of in such a way choose k physical resource unit: choose k physical resource unit continuously, choose k physical resource unit from the both sides of n physical resource unit continuously, choose k physical resource unit from the centre of n physical resource unit continuously, from n physical resource unit, equally spaced choose k physical resource unit from a side of n physical resource unit.

Further, this method also comprises: the resource mapping process that sets in advance other resource except that predetermined resource in the subframe of Broadcast Control Channel place; Perhaps, indicate the resource mapping process of other resource except that predetermined resource in the subframe of Broadcast Control Channel place by the control information in the Broadcast Control Channel.

Wherein, comprise one or more indication field in the control information, wherein, indication field carries following information one of at least: the number of continuous resource unit in the number of distributed resource units, each frequency partition in the number of little band, each frequency partition in the number of subband, each frequency partition in the number of the frequency partition in the resource in the subframe of Broadcast Control Channel place except that predetermined resource, the size of each frequency partition, each frequency partition.

Wherein, indicate by control information and to comprise: the resource mapping of indicating non-Broadcast Control Channel place subframe by the indication field in the control information, wherein, indication field carries following information one of at least: the number of continuous resource unit in the number of distributed resource units, each frequency partition in the number of little band, each frequency partition in the number of subband, each frequency partition in the number of non-Broadcast Control Channel place subframe medium frequency subregion, the size of each frequency partition, each frequency partition.

Wherein, indication field represents that by binary bits all or part of of the number of required binary bits fixed; Perhaps, all or part of of the number of required binary bits determined according to one of following information or combination: the number of system bandwidth, frequency partition, the size of frequency partition.

According to an aspect of the present invention, provide the method for mapping resource of control channel in a kind of communication system, the frame structure support of this communication system is with reference to communication system or with reference to the terminal of communication system, wherein, communication system is the evolution system with reference to communication system.

Method for mapping resource according to control channel in the communication system of the present invention comprises: the Broadcast Control Channel of communication system and/or synchronizing channel are positioned on the partial-band of system bandwidth of communication system; Wherein, partial-band is positioned on the center frequency-band or edge band of system bandwidth of communication system.

Wherein, Broadcast Control Channel comprises main Broadcast Control Channel and/or auxilliary Broadcast Control Channel, and synchronizing channel comprises primary synchronization channel and/or auxiliary synchronization channel.

Perhaps, in the OFDMA symbol at described synchronizing channel place, choose a frequency band from the centre of system bandwidth, wherein, the width of described frequency band is less than or equal to the frequency band broadband of minimum system bandwidth, selects k1 physical sub-carrier as described center frequency-band from n1 available physical subcarrier of described frequency band correspondence;

Wherein, n1 and k1 are natural number, and k1 is less than or equal to n1, and k1 is redefined for fixed value, and perhaps, k1 is determined by in the following parameter at least one: the base station type of described communication system, system bandwidth, multi-carrier-frequency mode.

26. method according to claim 25 is characterized in that, one of in such a way chooses a described k1 physical sub-carrier: equally spaced choose k1 physical sub-carrier from a described n1 physical sub-carrier; Perhaps, from a described n1 physical sub-carrier, choose k1 physical sub-carrier according to constant series or the method for replacing determined.

27., it is characterized in that for Broadcast Control Channel, described method also comprises according to each described method in the claim 18 to 25:

In the subframe at described Broadcast Control Channel place, side from system bandwidth selects a frequency bandwidth to be less than or equal to the sequential frequency band of minimum system bandwidth, and chooses k2 physical resource unit as described edge band from n2 physical resource unit of described sequential frequency band correspondence;

Perhaps, in the subframe at described Broadcast Control Channel place, select in the intermediate frequency band of system bandwidth a frequency bandwidth to be less than or equal to the sequential frequency band of minimum system bandwidth, and k2 physical resource unit chosen as described center frequency-band in the centre from n2 physical resource unit of described sequential frequency band correspondence;

Wherein, n2 and k2 are natural number, and k2 is less than or equal to n2, and k2 is redefined for and gets fixed value, and perhaps, k2 is determined by following at least one parameter: the base station type of described communication system, system bandwidth, multi-carrier-frequency mode.

28. method according to claim 26, it is characterized in that, one of in such a way choose a described k2 physical resource unit: from the number of a described n2 physical resource unit, and k1 is less than or equal to n1, k1 is redefined for fixed value, perhaps, k1 is determined by in the following parameter at least one: the base station type of communication system, system bandwidth, multi-carrier-frequency mode.

Wherein, one of in such a way choose k1 physical sub-carrier: from n1 physical sub-carrier, equally spaced choose k1 physical sub-carrier; Perhaps, from n1 physical sub-carrier, choose k1 physical sub-carrier according to constant series or the method for replacing determined;

For Broadcast Control Channel, method also comprises: in the subframe at Broadcast Control Channel place, side from system bandwidth selects a frequency bandwidth to be less than or equal to the sequential frequency band of minimum system bandwidth, and chooses k2 physical resource unit as edge band from n2 physical resource unit of sequential frequency band correspondence; Perhaps, in the subframe at Broadcast Control Channel place, select in the intermediate frequency band of system bandwidth a frequency bandwidth to be less than or equal to the sequential frequency band of minimum system bandwidth, and k2 physical resource unit chosen as center frequency-band in the centre from n2 physical resource unit of sequential frequency band correspondence; Wherein, n2 and k2 are natural number, and k2 is less than or equal to n2, and k2 is redefined for and gets fixed value, and perhaps, k2 is determined by following at least one parameter: the base station type of communication system, system bandwidth, multi-carrier-frequency mode.

Wherein, one of in such a way choose k2 physical resource unit: choose k2 physical resource unit continuously, choose k2 physical resource unit from the both sides of n2 physical resource unit continuously, choose k2 physical resource unit from the centre of n2 physical resource unit continuously, from n2 physical resource unit, equally spaced choose k2 physical resource unit from a side of n2 physical resource unit.

Wherein, continuous bandwidth refers to: the bandwidth corresponding physical Resource Unit that the primary synchronization channel of system bandwidth, communication system takies.

Further, said method also comprises: k2 physical resource unit is mapped as a frequency partition, wherein, k2 physical resource unit all is mapped as the distributed logic Resource Unit, perhaps, k2 physical resource unit is mapped as distributed logic Resource Unit and continous way logical resource unit.

Further, said method also comprises: the resource mapping process that sets in advance other resource except that k2 physical resource unit in the subframe of Broadcast Control Channel place; Perhaps, indicate the resource mapping process of other resource except that k2 physical resource unit in the subframe of Broadcast Control Channel place by the control information in the Broadcast Control Channel.

Wherein, method also comprises: main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of frequency partition, perhaps, main Broadcast Control Channel begins to take P distributed logic Resource Unit continuously to first distributed logic Resource Unit direction of frequency partition from last distributed logic Resource Unit of frequency partition; Wherein, P gets the fixed value that sets in advance, and perhaps, the value of P is determined one of at least by following information: the number of repetition that system bandwidth, base station type, main Broadcast Control Channel adopt.

Wherein, the distributed logic Resource Unit that takies of the distributed logic Resource Unit that takies of auxilliary Broadcast Control Channel and main Broadcast Control Channel is adjacent or non-conterminous; If the distributed logic Resource Unit that auxilliary Broadcast Control Channel takies is non-conterminous with the distributed logic Resource Unit that main Broadcast Control Channel takies, assist the quantity and/or the position of the distributed logic Resource Unit that Broadcast Control Channel takies by main Broadcast Control Channel indication; If the distributed logic Resource Unit that auxilliary Broadcast Control Channel takies is adjacent with the distributed logic Resource Unit that main Broadcast Control Channel takies, assist the quantity of the distributed logic Resource Unit that Broadcast Control Channel takies by main Broadcast Control Channel indication.

Wherein, one of at least k2 physical resource unit is mapped as a frequency partition by following steps: sub-band division, the displacement of little band, frequency partition are divided, distributed resource units and the continous way Resource Unit is divided, subcarrier permutation in the frequency partition.

Wherein, the information of carrying in bandwidth location that occupies according to primary synchronization channel or the synchronizing channel is determined the bandwidth location of Broadcast Control Channel, wherein, information comprises one of following: whether the system bandwidth of communication system, communication system are supported with reference to communication system, multi-carrier-frequency mode.

Wherein, multi-carrier-frequency mode is meant: utilize the division methods of predetermined division method or binary bits indication supporting that carrying out carrier frequency on the continuous bandwidth that overloading is operated frequently divides.

By above-mentioned at least one technical scheme of the present invention, design by control channel provided by the invention, solved the problem how synchronizing channel and Broadcast Control Channel take resource location and mode, simplified the process of terminal recognition Broadcast Control Channel, guaranteed spectrum efficiency based on the wireless communication system of OFDMA technology.

Description of drawings

Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the schematic diagram according to the frame structure of the wireless communication system of correlation technique (circulating prefix-length is 1/8);

Fig. 2 is the schematic diagram of the frame structure structure (circulating prefix-length is 1/16) according to the wireless communication system of correlation technique;

Fig. 3 is the schematic diagram according to the resource structures of the wireless communication system of correlation technique;

Fig. 4 is the flow chart according to the method for mapping resource of the control channel of the inventive method embodiment one;

Fig. 5 is the resource mapping process schematic diagram according to the non-Broadcast Control Channel place subframe of the 5MHz OFDMA system of the inventive method embodiment;

Fig. 6 is in the 5MHz OFDMA system of the example 2 according to the present invention, the schematic diagram of the resource mapping process 1 of Broadcast Control Channel place subframe;

Fig. 7 is in the 5MHz OFDMA system of the example 3 according to the present invention, the schematic diagram of the resource mapping process 2 of Broadcast Control Channel place subframe;

Fig. 8 is the 10MHz OFDMA system of the example 4 according to the present invention, the schematic diagram of the resource mapping process 1 of Broadcast Control Channel place subframe;

Fig. 9 is the 10MHz OFDMA system of the example 5 according to the present invention, the schematic diagram of the resource mapping process schematic diagram 2 of Broadcast Control Channel place subframe;

Figure 10 is the 10MHz OFDMA system of the example 6 according to the present invention, the schematic diagram of the resource mapping process schematic diagram 3 of Broadcast Control Channel place subframe;

Figure 11 is the flow chart according to the method for mapping resource of the control channel of the inventive method embodiment two;

Figure 12 is the 10MHz OFDMA system of the example 7 according to the present invention, the schematic diagram of the resource mapping process of Broadcast Control Channel place subframe when supporting overloading frequently;

Figure 13 is the 20MHz OFDMA system of the example 8 according to the present invention, the schematic diagram of the resource mapping process of Broadcast Control Channel place subframe when supporting overloading frequently.

Embodiment

Functional overview

Before describing embodiments of the invention, at first the resource mapping process to the OFDMA technology is briefly described.Need to prove, though be that example describes with the OFDMA technology in embodiments of the present invention, but the invention is not restricted to this, such as long evolving system (Long Term Evolution, abbreviate LTE as) etc. in multicarrier system and other multicarrier systems that may occur in the future, can use the present invention equally.

In wireless communication system based on the OFDMA technology, the resource mapping process can be understood as the process that physical resource (as physical sub-carrier) is mapped as logical resource (as the logical resource unit), for example, physical sub-carrier is mapped as the logical resource unit, like this, the base station is by the scheduling of scheduling logic Resource Unit realization to Radio Resource.And the main foundation of resource mapping is the frame structure and the resource structures of OFDMA system.In frame structure, the unit that Radio Resource is divided into different brackets on time domain is dispatched, for example, be divided into superframe (Super frame), frame (Frame), subframe (Subframe) and OFDMA symbol (Symbol), with service quality (the Quality of Service that satisfies wireless communication system, abbreviate QoS as) requirement, especially satisfy the requirement of system transmissions time delay.For example, shown in Figure 1, Radio Resource is divided into superframe on time domain, each superframe comprises 4 frames, each frame comprises 8 subframes again, subframe is made up of 6 basic OFDMAOFDMA symbols, and factors such as the speed of the terminal that actual communication systems is supported as required, speed and type of service are determined the OFDMAOFDMA symbol quantity that specifically comprises in each grade unit in the frame structure; Among Fig. 2, first descending sub frame, last descending sub frame and last sub-frame of uplink all comprise 7 OFDMAOFDMA symbols, and all the other are 6 OFDMAOFDMA symbols.

The coverage that resource structures is supported on frequency domain as required, the factors such as speed, speed and type of service of terminal are divided into a plurality of frequency partition (FrequencyPartition) with available frequency band, and then the frequency resource in the frequency partition are divided into continous way logical resource unit and/or the distributed logic Resource Unit is dispatched.As shown in Figure 3, the available physical subcarrier of a subframe is divided into 3 frequency partition, each frequency partition is divided into continous way logical resource unit area and distributed logic Resource Unit zone, to realize the flexibility of scheduling, as required, also can be divided into 1,2,3 or 4 and above frequency partition, the present invention is not limited in this respect.

Based on this, the present invention according to the frame structure of OFDMA technology (for example, frame structure illustrated in figures 1 and 2) and resource structures (for example, resource structures shown in Figure 3) characteristics, the performance that exists in the design at control channel and the equilibrium problem of resource have proposed a kind of resource mapping scheme of control channel, wherein, this method can be applied in the OFDMA system, with the spectrum efficiency of the wireless communication system of guaranteeing OFDMA.

Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

Need to prove: the BCCH among the present invention can abbreviate broadcast channel (Broadcast Channel abbreviates BCH as) as under the condition of setting forth control channel.In addition, because Broadcast Control Channel begins to send at the head of superframe usually, in some scene, Broadcast Control Channel also is known as superframe head (Superframe Header abbreviates SFH as), and main Broadcast Control Channel also is known as main superframe head (Primary Superframe Header, abbreviate P-SFH as), auxilliary Broadcast Control Channel also is known as auxilliary superframe head (Secondary Superframe Header abbreviates S-SFH as).Clean culture control channel (USCCH) among the present invention is mainly used in the transmission resource allocation information, and resource allocation information is known as MAP information under some scene, the USCCH channel also is known as the MAP channel, and the MAP channel is used to send specific MAP information of non-user and/or the specific MAP information of user.

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.

Method embodiment one

According to the embodiment of the invention, provide a kind of method for mapping resource of control channel.

Fig. 4 is the flow chart according to the method for mapping resource of the control channel of the embodiment of the invention, and as shown in Figure 4, this method may further comprise the steps (step S402 is to step S404)

Step S402, the resource mapping process of Broadcast Control Channel place subframe is different with the resource mapping process of non-Broadcast Control Channel place subframe, wherein, the OFDMA number of symbols that comprises in the subframe of Broadcast Control Channel place is determined by the length of the Cyclic Prefix of communication system employing.Here, non-Broadcast Control Channel is other control channels except that Broadcast Control Channel, particularly, resource mapping process that can Broadcast Control Channel place subframe is set to different with the resource mapping process of non-Broadcast Control Channel place subframe, wherein, Broadcast Control Channel can comprise main Broadcast Control Channel and/or auxilliary Broadcast Control Channel;

Step S404, the resource mapping process of non-Broadcast Control Channel place subframe is indicated by the control information in the Broadcast Control Channel, particularly, can indicate the resource mapping of non-Broadcast Control Channel place subframe by the indication field in the control information, wherein, indication field carries following information: the number of non-Broadcast Control Channel place subframe medium frequency subregion, the size of frequency partition, the number of subband in the frequency partition, the number of little band in the frequency partition, the number of distributed resource units in the frequency partition, the number of continuous resource unit in the frequency partition, in specific implementation process, above-mentioned indication field can represent that all or part of of the number of required binary bits fixed by binary bits; Perhaps, all or part of of the number of required binary bits determined according to one of following information or combination: the number of system bandwidth, frequency partition, the size of frequency partition.

Different being meant of resource mapping process of the resource mapping process of Broadcast Control Channel place subframe and non-Broadcast Control Channel place subframe: the resource mapping process of Broadcast Control Channel place subframe is not indicated in control information, and, in specific implementation process, need set in advance the resource mapping process of Broadcast Control Channel place subframe.

Resource mapping process to Broadcast Control Channel place subframe is elaborated below.

At first, choose predetermined resource from the subframe of Broadcast Control Channel place, wherein, the band width in physical that predetermined resource takies is less than or equal to minimum system bandwidth, and perhaps, the frequency difference in the predetermined resource between any two subcarriers is less than or equal to minimum system bandwidth.Choosing the predetermined resource concrete operations is: with k physical resource unit in n the physical resource unit of communication system as predetermined resource, wherein, n physical resource unit is one of following: the primary synchronization channel occupied bandwidth corresponding physical Resource Unit of minimum system bandwidth corresponding physical Resource Unit, communication system arbitrarily in the total system bandwidth corresponding physical Resource Unit of communication system, the total bandwidth of communication system, wherein, n and k are natural number, and k is less than or equal to n.

Wherein, one of can be in such a way choose k physical resource unit:: choose k physical resource unit continuously, choose k physical resource unit from the both sides of n physical resource unit continuously, choose k physical resource unit from the centre of n physical resource unit continuously, from n physical resource unit, equally spaced choose k physical resource unit from a side of n physical resource unit.

Then, the predetermined resource that selects is mapped as a frequency partition, and concrete map operation one of may further comprise the steps at least: sub-band division, the displacement of little band, frequency partition are divided, division, the subcarrier permutation of distributed resource units and continuous resource unit in the frequency partition.In mapping process, predetermined resource all can be mapped as the distributed logic Resource Unit, perhaps, predetermined resource is mapped as distributed logic Resource Unit and continous way logical resource unit.

Then, Broadcast Control Channel takies the distributed logic Resource Unit, wherein, main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of frequency partition, wherein, P gets the fixed value that sets in advance, and perhaps, the value of P is determined one of at least by following information: system bandwidth, base station type.Particularly, there are adjacent or non-conterminous two kinds of situations in the distributed resource units that distributed resource units that auxilliary Broadcast Control Channel takies and main Broadcast Control Channel take: if the distributed resource units that auxilliary Broadcast Control Channel takies is non-conterminous with the distributed resource units that main Broadcast Control Channel takies, assist the quantity and the position of the distributed resource units that Broadcast Control Channel takies by main Broadcast Control Channel indication; If the distributed resource units that auxilliary Broadcast Control Channel takies is adjacent with the distributed resource units that main Broadcast Control Channel takies, assist the quantity of the distributed resource units that Broadcast Control Channel takies by main Broadcast Control Channel indication.

At last, for the resource mapping process of other resources except that predetermined resource in the subframe of Broadcast Control Channel place, one of can be in the following manner carry out the resource mapping: the resource mapping process that sets in advance other resources except that predetermined resource in the subframe of Broadcast Control Channel place; Perhaps, resource mapping process by other resources except that predetermined resource in the subframe of the indication of the control information in Broadcast Control Channel Broadcast Control Channel place, can comprise one or more indication field in this control information, indication field is indicated one of following information or combination: the number of the frequency partition in the resource in the subframe of Broadcast Control Channel place except that predetermined resource, the size of frequency partition, the number of subband in the frequency partition, the number of little band in the frequency partition, the number of distributed resource units in the frequency partition, the number of continuous resource unit in the frequency partition, in specific implementation process, above-mentioned indication field can represent that all or part of of the number of required binary bits fixed by binary bits; Perhaps, all or part of of the number of required binary bits determined according to one of following information or combination: the number of system bandwidth, frequency partition, the size of frequency partition.

In addition, Broadcast Control Channel has resource allocation information, and resource allocation information comprises one of following: the resource location that the resource type that the resource quantity that Broadcast Control Channel takies, Broadcast Control Channel take, Broadcast Control Channel take.

By the technical scheme that the embodiment of the invention provides, simplified the process of terminal recognition Broadcast Control Channel, guaranteed spectrum efficiency based on the wireless communication system of OFDMA technology.

Because in embodiments of the present invention, the resource mapping process that need satisfy the resource mapping process of Broadcast Control Channel place subframe and non-Broadcast Control Channel place subframe is inequality, wherein, non-Broadcast Control Channel place subframe is meant and does not have Broadcast Control Channel in this subframe.Below in conjunction with instantiation the resource mapping process broadcasting of non-Broadcast Control Channel place subframe and the resource mapping process of Broadcast Control Channel place subframe are described.

Example 1

Fig. 5 has described the resource mapping process of the non-Broadcast Control Channel place subframe of 5MHz OFDMA system, as shown in Figure 4, it is 512 that the FFT of 5MHz system counts, usable data subcarriers is 432 in the subframe, be divided into into the individual physical resource unit of N (=24) (Physical Resource Unit, abbreviate PRU as), each size is 18x6, be that frequency domain is 18 carrier waves, time domain is 6 OFDMA symbols, since Cyclic Prefix and control channel, the OFDMA number of symbols possibility 5 or 7 on the time domain.

At first 24 physical resource unit are divided into a plurality of Subband (subband), each Subband comprises a continuous N1 physical resource unit, and for example N1=4 then is 6 Subband, and Subband is replaced or uniformly-spaced choose K from Subband _SBIndividual Subband, for example, K _SB=3, adopt the ranks displacement, permutation matrix is [0,1; 2,3; 4,5], then the order before the displacement is [0,1,2,3,4,5,6], and the order after the displacement is [0,2,4,1,3,5].Physical resource unit among the remaining Subband is divided into a plurality of Miniband, and each Subband comprises a continuous N2 physical resource unit, and for example N2=1 then is 12 Miniband, and Miniband is carried out replacement operator.

The Subband and the Miniband that obtain are mapped to 3 frequency partition, comprise 1 Subband and 4 Miniband in each frequency partition, again all PRU in each frequency partition are divided into continous way Resource Unit (Contigous Resource Unit, abbreviate CRU as) (subcarrier in the continous way Resource Unit is continuous) and distributed resource units (Distruibuted Resource Unit, abbreviate DRU as) (subcarrier in the distributed resource units or subcarrier are to being discontinuous, two internal subcarriers of subcarrier are continuous), during default setting, Subband in each frequency partition is used for the continous way Resource Unit, Miniband is used for distributed resource units, like this, just realized the resource mapping process of non-Broadcast Control Channel.

Can utilize indication field to indicate above-mentioned resource mapping process in Broadcast Control Channel, that is, the resource mapping process is corresponding one by one with indication field.For example, when system bandwidth is 5MHz, can represent the Subband number reserved, i.e. K with 3 bits _SBCan represent above-mentioned resource mapping process with the indication field that comprises 10 binary bits, preceding two bits (promptly, the 1st bit and the 2nd bit) what frequency partition are used to indicate the sub-frame division with non-Broadcast Control Channel place be, promptly, the number of the subframe medium frequency subregion at non-Broadcast Control Channel place, as among Fig. 5 being 3 frequency partition, the number of the subframe medium frequency subregion at the non-Broadcast Control Channel of 10 expressions place is 3,00 can represent that the number of the subframe medium frequency subregion at non-Broadcast Control Channel place is 1,01 can represent that the number of the subframe medium frequency subregion at non-Broadcast Control Channel place is 2,11 can represent that the number of the subframe medium frequency subregion at non-Broadcast Control Channel place is 4, the corresponding relation of the number of the subframe medium frequency subregion at the value of preceding two bits and non-Broadcast Control Channel place can be chosen arbitrarily as required, is not limited to foregoing description; 5 bits subsequently (that is, the 3rd bit to the 7 bits) are used to represent the size except that the frequency partition first frequency partition, and unit is Miniband, and for example the size of each frequency partition all is 8, then is 01000; Last 3 bits (that is, the 8th bit to the 10 bits) are used for representing the quantity of the Subband that comprises except that the frequency partition first frequency partition, and as shown in Figure 4, the quantity of the Subband that comprises in the frequency partition is 1, then is 001.These bits can use one or more field indications according to design requirement, and concrete, the amount of bits of field can be fixed, also can be corresponding with the bandwidth of system, and for example, the field of correspondence was 12 bits when system bandwidth was 10MHz.

Each frequency partition can be respectively indicates by 1 bit whether the distribution of CRU and DRU is default configuration in this frequency partition, if not default configuration, can indicate CRU in each frequency partition or the quantity of DRU by clear and definite indication field, similarly, required amount of bits can be fixed, also can be corresponding with system bandwidth.

The base station is carried at this indication field in the control information of Broadcast Control Channel, send to terminal, terminal is obtained this indication field by reading the control information in the Broadcast Control Channel, and obtains the resource mapping process of non-Broadcast Control Channel place subframe according to this indication field.

Resource mapping process below in conjunction with example 2, example 3, example 4 and 5 pairs of Broadcast Control Channel places of example subframe describes.

In embodiments of the present invention, the resource mapping process of the subframe at Broadcast Control Channel place determines that promptly, the resource mapping process of the subframe at Broadcast Control Channel place or place frequency partition pre-sets, and does not need indication field to indicate.

Because the difference of Cyclic Prefix, the OFDMA number of symbols of a subframe on time domain may be 5,6, or 7, and the OFDMA symbolic number of Broadcast Control Channel place subframe can only be 6 or 7, wherein, when the OFDMA symbolic number of Broadcast Control Channel place subframe is 6, synchronizing channel takies first OFDMA symbol of this subframe, Broadcast Control Channel takies all the other 5 OFDMA symbols of this subframe, as shown in Figure 1, because circulating prefix-length is 1/8 OFDMAOFDMA symbol, comprise 6 OFDMAOFDMA symbols at first descending sub frame, synchronizing channel takies first OFDMAOFDMA symbol, and Broadcast Control Channel takies back 5 OFDMAOFDMA symbols; When the OFDMA symbolic number of Broadcast Control Channel place subframe is 7, synchronizing channel takies first OFDMA symbol of this subframe, Broadcast Control Channel takies all the other 6 OFDMA symbols of this subframe, as shown in Figure 2, because circulating prefix-length is 1/16 OFDMAOFDMA symbol, comprise 7 OFDMAOFDMA symbols at first descending sub frame, synchronizing channel takies first OFDMAOFDMA symbol, and Broadcast Control Channel takies back 6 OFDMAOFDMA symbols.The resource mapping process of the Broadcast Control Channel place subframe of describing among the present invention does not comprise the resource mapping process of the above-mentioned OFDMA symbol that synchronizing channel takies.The OFDMAOFDMA symbolic number that to represent Broadcast Control Channel on time domain, to occupy with Ns hereinafter.

Example 2

Fig. 6 has described in the 5MHz OFDMA system according to the embodiment of the invention, the schematic diagram of the resource mapping process 1 of Broadcast Control Channel place subframe, as shown in Figure 5, it is 512 that the FFT of 5MHz system counts, usable data subcarriers is 432 in the subframe, be divided into into the individual PRU of N (=24), each PRU size is 18xNs, be that frequency domain is 18 carrier waves, time domain is a Ns OFDMAOFDMA symbol, because Cyclic Prefix and control channel, the OFDMA symbolic number that Broadcast Control Channel takies on time domain can only be 5 or 6.

At first, all choose or extract some (for example k 's) physical resource unit from the both sides of 24 physical resource unit, concrete quantity depends on the data volume that Broadcast Control Channel need send, this is determined by one of system bandwidth, base station type, multi-carrier-frequency mode or combination, perhaps, this quantity is provided with as required flexibly.Afterwards, this k physical resource unit directly can be mapped as a frequency partition or a plurality of frequency partition; Perhaps, in can once handling this k physical resource unit one of at least: sub-band division, the displacement of little band, frequency partition are divided, and the physical resource unit after will handling is mapped as one or more frequency partition, above-mentioned one or more frequency partition is Broadcast Control Channel subregion (BCH Frequency Partition), to be different from other subregion.

For example, when k=4, these 4 physical resource unit directly can be mapped as a frequency partition, these 4 physical resource unit are carried out subcarrier permutation obtain 4 distributed logic Resource Units, be used to carry Broadcast Control Channel, if Broadcast Control Channel not exclusively takies this 4 distributed logic Resource Units, then remaining distributed physical resource unit can be sent data and other control information.For all the other 20 physical resource unit in 24 physical resource unit altogether, can carry out the resource mapping to it, and send other possible control channel and data.

Need to prove, in choosing the process of physical resource unit, can choose the physical resource unit of some from a side (left side or right side) of 24 physical resource unit, also can choose the physical resource unit of some from the centre of 24 physical resource unit, also can from 24 physical resource unit, equally spaced choose the physical resource unit of some, then the physical resource unit that selects is mapped as the distributed logic Resource Unit, this distributed logic Resource Unit is used to carry Broadcast Control Channel, and the physical resource unit that does not select in 24 physical resource unit is used to send other possible control channel and data after through the resource mapping.

Example 3

Fig. 7 has described in the 5MHz OFDMA system according to the embodiment of the invention, the schematic diagram of the resource mapping process 2 of Broadcast Control Channel place subframe, as shown in Figure 6, it is 512 that the FFT of 5MHz system counts, usable data subcarriers is 432 in the subframe, be divided into into the individual PRU of N (=24), each PRU size is 18xNs, be that frequency domain is 18 carrier waves, time domain is a Ns OFDMA symbol, because Cyclic Prefix and control channel, the OFDMA symbolic number that Broadcast Control Channel takies on time domain can only be 5 or 6.。

Above-mentioned 24 physical resource unit are all chosen out, that is, and k=24, and the resource mapping process that these 24 Resource Units are scheduled to, the resource mapping process shown in the left-half of Fig. 7.

Also these 24 physical resource unit only can be carried out subcarrier permutation and obtain 24 distributed logic Resource Units, be used to carry Broadcast Control Channel, by the resource mapping process that 24 physical resource unit are determined, this resource mapping process and Fig. 5 are similar, repeat no more here.Like this, guaranteed that terminal can not need extra signaling to indicate the Broadcast Control Channel of just decoding.In like manner, if Broadcast Control Channel not exclusively takies this 24 distributed logic Resource Units, then the surplus resources unit in these 24 distributed physical resource unit can be used to send data and control information thereof.

Example 4

Fig. 8 is the 10MHz OFDMA system according to the embodiment of the invention, the schematic diagram of the resource mapping process 1 of Broadcast Control Channel place subframe, as shown in Figure 8, it is 1024 that the FFT of 10MHz system counts, available data subcarrier is 864 in the subframe, be divided into into the individual PRU of N (=48), each PRU size is 18x Ns, be that frequency domain is 18 carrier waves, time domain is a Ns OFDMA symbol, because Cyclic Prefix and control channel, the OFDMA symbolic number that Broadcast Control Channel takies on time domain can only be 5 or 6.

Synchronizing channel is positioned on the bandwidth of middle 5MHz, the physical resource unit of choosing some (for example k) from 24 physical resource unit of the 5MHz bandwidth correspondence of centre one of is handled at least through following mapping: sub-band division, the displacement of little band, frequency partition are divided, afterwards, be mapped as a frequency partition or a plurality of frequency partition; Perhaps, 24 physical resource unit with the 5MHz bandwidth correspondence of centre directly are mapped as a frequency partition.Through shining upon the frequency partition that obtains after the processing is the Broadcast Control Channel subregion, to be different from other subregion, sends Broadcast Control Channel in the frequency partition that obtains.Wherein, the concrete quantity of k value depends on following parameter one of at least: the data volume that Broadcast Control Channel need send, system bandwidth, multi-carrier-frequency mode, for example, k=12 among Fig. 8 is 24 among Fig. 9.

In Fig. 8, k=12, these 12 Resource Units are carried out the displacement of little band after, be mapped to a frequency partition, carry out subcarrier permutation again, all be mapped to the distributed logic Resource Unit, that is, handle 12 distributed logic Resource Units that obtain and be used to carry Broadcast Control Channel through mapping; Like this, remaining 36 physical resource unit are used to send other possible control channel and data after through the resource mapping in 48 distributed physical resource unit.

In Fig. 9, k=24, after these 24 Resource Units are carried out the displacement of sub-band division, little band, be mapped to a frequency partition, carrying out CRU/DRU again distributes and subcarrier permutation, be mapped to distributed logic Resource Unit and continous way logical resource unit, wherein handle 12 distributed logic Resource Units that obtain and be used to carry Broadcast Control Channel through mapping; Like this, remaining 24 physical resource unit are used to send other possible control channel and data after through the resource mapping in 48 distributed physical resource unit.

Need to prove that in this example, process and Fig. 5 of choosing physical resource unit are similar, repeat no more here.

Example 5

Figure 10 is the 10MHz OFDMA system according to the embodiment of the invention, the schematic diagram of the resource mapping process schematic diagram 3 of Broadcast Control Channel place subframe, as shown in figure 10, it is 1024 that the FFT of 10MHz system counts, available data subcarrier is 864 in the subframe, be divided into into the individual PRU of N (=48), each PRU size is 18x Ns, be that frequency domain is 18 carrier waves, time domain is a Ns OFDMA symbol, because Cyclic Prefix and control channel, the OFDMA symbolic number that Broadcast Control Channel takies on time domain can only be 5 or 6.

As shown in figure 10, synchronizing channel and Broadcast Control Channel all are positioned at the edge band of system bandwidth 10MHz, be on first 5MHz, the physical resource unit of choosing some (for example k) from 24 physical resource unit of first 5MHz bandwidth correspondence one of is handled at least through following mapping: sub-band division, little band displacement, frequency partition is divided, afterwards, be mapped as a frequency partition or a plurality of frequency partition, wherein, the concrete quantity of k value depends on the data volume that Broadcast Control Channel need send, system bandwidth, multi-carrier-frequency mode, for example, k=12 among Figure 10.For example, after these 12 Resource Units are carried out the displacement of little band, be mapped to a frequency partition, this frequency partition is the Broadcast Control Channel subregion, to be different from other subregion, again the physical resource unit in this frequency partition is carried out subcarrier permutation, all be mapped to the distributed logic Resource Unit, that is, 12 distributed logic Resource Units that mapping obtains through resource are used to carry Broadcast Control Channel and possible data and control information.Then, remaining 36 physical resource unit are used to send other possible control channel and data after through the resource mapping in 48 distributed physical resource unit.

Method embodiment two

According to the embodiment of the invention, the method for mapping resource of control channel in a kind of communication system is provided, the frame structure support of described communication system is with reference to communication system or with reference to the terminal of communication system, wherein, described communication system is described evolution system with reference to communication system, for example, communication system can be the 802.16m system, can be the 802.16e system with reference to communication system.

Figure 11 shows the flow process of method for mapping resource of the control channel of the embodiment of the invention, as shown in figure 11, comprises following processing (step S1102 is to step S1104).

Step S1102, the control channel of communication system is positioned on the partial-band of system bandwidth of communication system, particularly, the control channel of evolution system is arranged on the partial-band of system bandwidth of communication system, wherein, control channel comprises Broadcast Control Channel and/or synchronizing channel, wherein, Broadcast Control Channel comprises main Broadcast Control Channel and/or auxilliary Broadcast Control Channel, synchronizing channel comprises primary synchronization channel and/or auxiliary synchronization channel, wherein, the OFDMA number of symbols that comprises in the subframe of Broadcast Control Channel place is by the circulating prefix-length decision of the employing of communication system;

Step S1104, wherein, partial-band is positioned on the center frequency-band or edge band of system bandwidth of communication system.

Below above steps is elaborated.

(1) step S1102

In specific implementation process, can determine the position of Broadcast Control Channel according to the overloading of carrying in synchronizing channel configuration information frequently, wherein, it is one of following that overloading configuration information frequently comprises: whether the bandwidth that the system bandwidth of communication system, synchronizing channel take, communication system support frame of reference, multi-carrier-frequency mode pattern, wherein, frame of reference is last generation system of evolution system; Also can determine the position of Broadcast Control Channel according to the position of synchronizing channel.

In addition, the bandwidth that primary synchronization channel and/or main Broadcast Control Channel can be taken all is set to be less than or equal to the minimum system bandwidth of communication system, promptly, frequency difference between any two subcarriers that primary synchronization channel and/or main Broadcast Control Channel take is less than or equal to the minimum system bandwidth of communication system, further, the band width in physical that takies of main Broadcast Control Channel is less than or equal to the band width in physical that primary synchronization channel takies.

On the one hand, terminal one of can be in the following manner obtained the number and/or the position of the distributed resource units that main Broadcast Control Channel takies: the distributed resource units, terminal that main Broadcast Control Channel takies fixed number obtained the number of the distributed resource units that main Broadcast Control Channel takies by blind Detecting.

On the other hand, terminal one of can be in the following manner obtained the number and/or the position of the distributed resource units that auxilliary Broadcast Control Channel takies: main Broadcast Control Channel need indicate the number of the distributed resource units that auxilliary Broadcast Control Channel takies and/or position, terminal to obtain the number and/or the position of the distributed resource units that auxilliary Broadcast Control Channel takies by blind Detecting.

(2) step S1104

In specific implementation process, at first need to be provided with the center frequency-band and the edge band of control channel, center frequency-band and being provided with respectively of edge band to the Broadcast Control Channel of the setting of the center frequency-band of the synchronizing channel of evolution system and edge band and evolution system describes below.

For synchronizing channel, in the OFDMA at synchronizing channel place symbol, side from system bandwidth or frequency bandwidth of middle selection are the sequential frequency band that is less than or equal to minimum system bandwidth, and choose k1 physical sub-carrier as edge band from any side of n1 available physical subcarrier of sequential frequency band correspondence is equally spaced, and/or, equally spaced select k1 physical sub-carrier as center frequency-band from the centre of n1 available physical subcarrier of system bandwidth correspondence, wherein, n1 and k1 are natural number, and k1 is less than or equal to n1, k1 is redefined for fixed value, perhaps, k1 is determined by in the following parameter at least one: communication system base station type, system bandwidth, the multi-carrier-frequency mode pattern.After selecting k1 physical sub-carrier, k1 physical sub-carrier can be mapped to distributed sub-carrier, the originating on first distributed resource units of Broadcast Control Channel.

For Broadcast Control Channel, in the OFDMA at Broadcast Control Channel place symbol, side from system bandwidth or frequency bandwidth of middle selection are the sequential frequency band that is less than or equal to minimum system bandwidth, and k2 physical resource unit chosen as edge band in the one or both sides from n2 physical resource unit of sequential frequency band correspondence, perhaps, k2 physical resource unit chosen as center frequency-band in centre from n2 physical resource unit of sequential frequency band correspondence, wherein, n2 and k2 are natural number, and k2 is less than or equal to n2, k2 is redefined for and gets fixed value, perhaps, k2 is determined by following at least one parameter: communication system base station type, system bandwidth, the multi-carrier-frequency mode pattern.After selecting k2 physical resource unit, k2 physical resource unit can be mapped to the distributed logic Resource Unit, make Broadcast Control Channel originate on first distributed logic Resource Unit.

After the center frequency-band of determining synchronizing channel and edge band, can be by the position of following dual mode determining section frequency band:

Mode one: if communication system supports overloading frequently, then synchronizing channel and/or Broadcast Control Channel are arranged on the edge band of system bandwidth of communication system, wherein, communication system supports that overloading is meant frequently: support a plurality of carrier frequency on the continuous bandwidth part of system bandwidth or system bandwidth, and at least one carrier frequency back-up system wherein, wherein, it is one of following that the continuous bandwidth of system bandwidth or system bandwidth partly comprises: continuous 10MHz, continuous 15MHz, continuous 20MHz, the integral multiple of the minimum system bandwidth of communication system, continuous bandwidth refers to: system bandwidth, the bandwidth corresponding physical Resource Unit that the primary synchronization channel of communication system takies;

Mode two: when communication system does not support overloading frequently, then synchronizing channel and/or Broadcast Control Channel are arranged on the center frequency-band of system bandwidth of communication system.

At first, the above-mentioned k2 that a selects physical resource unit is mapped as a frequency partition, and concrete map operation one of may further comprise the steps at least: sub-band division, the displacement of little band, frequency partition are divided, division, the subcarrier permutation of distributed resource units and continuous resource unit in the frequency partition.In mapping process, k2 physical resource unit all can be mapped as the distributed logic Resource Unit, perhaps, k2 physical resource unit is mapped as distributed logic Resource Unit and continous way logical resource unit.

Afterwards, Broadcast Control Channel takies the distributed logic Resource Unit, wherein, main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of frequency partition, wherein, P gets the fixed value that sets in advance, and perhaps, the value of P is determined one of at least by following information: system bandwidth, base station type.Particularly, there are adjacent or non-conterminous two kinds of situations in the distributed resource units that distributed resource units that auxilliary Broadcast Control Channel takies and main Broadcast Control Channel take: if the distributed resource units that auxilliary Broadcast Control Channel takies is non-conterminous with the distributed resource units that main Broadcast Control Channel takies, assist the quantity and the position of the distributed resource units that Broadcast Control Channel takies by main Broadcast Control Channel indication; If the distributed resource units that auxilliary Broadcast Control Channel takies is adjacent with the distributed resource units that main Broadcast Control Channel takies, assist the quantity of the distributed resource units that Broadcast Control Channel takies by main Broadcast Control Channel indication.

At last, for the resource mapping process of other resources except that k2 physical resource unit in the subframe of Broadcast Control Channel place, one of can be in the following manner carry out the resource mapping: the resource mapping process that sets in advance other resources except that k2 physical resource unit in the subframe of Broadcast Control Channel place; Perhaps, resource mapping process by other resources except that k2 physical resource unit in the subframe of the indication of the control information in Broadcast Control Channel Broadcast Control Channel place, can comprise one or more indication field in this control information, indication field is indicated one of following information or combination: the number of the frequency partition in the resource in the subframe of Broadcast Control Channel place except that k2 physical resource unit, the size of frequency partition, the number of subband in the frequency partition, the number of little band in the frequency partition, the number of distributed resource units in the frequency partition, the number of continuous resource unit in the frequency partition, in specific implementation process, above-mentioned indication field can represent that all or part of of the number of required binary bits fixed by binary bits; Perhaps, all or part of of the number of required binary bits determined according to one of following information or combination: the number of system bandwidth, frequency partition, the size of frequency partition.

In said process, the information of carrying in bandwidth location that can occupy according to primary synchronization channel or the synchronizing channel is determined the bandwidth location of Broadcast Control Channel, wherein, information comprises one of following: whether the system bandwidth of communication system, communication system are supported with reference to communication system, multi-carrier-frequency mode.

Above-mentioned multi-carrier-frequency mode is meant: utilize the division methods of predetermined division method or binary bits indication supporting that carrying out carrier frequency on the continuous bandwidth that overloading is operated frequently divides.

By means of technique scheme, simplified the process of terminal recognition control channel, guaranteed spectrum efficiency based on the wireless communication system of OFDMA technology.

Describe below in conjunction with example 6 and 7 couples of method embodiment two of example.

Example 6

Figure 12 is a 10MHz OFDMA system, the schematic diagram of the resource mapping process of Broadcast Control Channel place subframe when supporting overloading frequently, as shown in figure 12,10MHz is divided into two 5MHz, one of them 5MHz is used to support the 16m system (promptly, communication system mentioned above), another 5MHz is used to support 16e system (that is, mentioned above reference communication system).

As shown in figure 12, because the position of the Broadcast Control Channel of 16m system is positioned at the edge band of the system bandwidth of communication system, then the Broadcast Control Channel of 16m system can not be positioned on the center 5MHz bandwidth of 10MHz (promptly, on the center frequency-band of communication system), like this, similar with Fig. 6 and Fig. 7, at first, choose some (for example k 's) physical resource unit from a side of 24 physical resource unit, concrete quantity depends on data volume, system bandwidth, the multi-carrier-frequency mode that Broadcast Control Channel need send, and this quantity can be provided with as required flexibly.Afterwards, this k physical resource unit directly can be mapped as a frequency partition; Perhaps, in can once handling this k physical resource unit one of at least: sub-band division, the displacement of little band, frequency partition are divided, and the physical resource unit after will handling is mapped as one or more frequency partition, above-mentioned one or more frequency partition is the Broadcast Control Channel subregion, to be different from other subregion.

As shown in figure 12, k=8, these 8 Resource Units directly can be mapped as a frequency partition, these 8 physical resource unit are carried out subcarrier permutation obtain 8 distributed logic Resource Units, be used to carry Broadcast Control Channel, if Broadcast Control Channel not exclusively takies this 8 distributed logic Resource Units, then the surplus resources unit in these 8 distributed physical resource unit can be used to send data and control information thereof.For all the other 16 physical resource unit in 24 physical resource unit altogether, can carry out the resource mapping to it, and be used to send other possible control channel and data.

The 16m terminal that can be used in addition, 10MHz for the protection subcarrier in the middle of 16m system and the 16e system.

Example 7

Figure 12 is a 20MHz OFDMA system, the schematic diagram of the resource mapping process of Broadcast Control Channel place subframe when supporting overloading frequently, as shown in figure 13,20MHz is divided into two 5MHz and a 10MHz, 10MHz wherein and a 5MHz are used to support the 16m system, and another 5MHz is used to support the 16e system.

As shown in figure 13, because the position of the Broadcast Control Channel of 16m is positioned on the edge band of system bandwidth, then the Broadcast Control Channel of 16m system can not be positioned on the center 5MHz bandwidth of 10MHz (that is, on the center frequency-band of communication system).Similar with Fig. 5, at first, choose the physical resource unit of some (for example k) from a side of 24 physical resource unit, concrete quantity depends on data volume, system bandwidth, the multi-carrier-frequency mode that Broadcast Control Channel need send, and this quantity can be provided with as required flexibly.Afterwards, this k physical resource unit directly can be mapped as a frequency partition; Perhaps, in can once handling this k physical resource unit one of at least: sub-band division, the displacement of little band, frequency partition are divided, and the physical resource unit after will handling is mapped as one or more frequency partition, above-mentioned one or more frequency partition is the Broadcast Control Channel subregion, to be different from other subregion.

For example, as shown in figure 13, k=8, these 8 Resource Units directly can be mapped as a frequency partition, these 8 physical resource unit are carried out subcarrier permutation obtain 8 distributed logic Resource Units, be used to carry Broadcast Control Channel,, then the surplus resources unit in these 8 distributed physical resource unit can be used to send data and control information thereof if Broadcast Control Channel not exclusively takies this 8 distributed logic Resource Units.For all the other 16 physical resource unit in 24 physical resource unit altogether, can carry out the resource mapping to it, and be used to send other possible control channel and data.

In this example, select process and Figure 11 of physical resource unit similar, repeat no more here.

The 16m terminal that can be used in addition, 20MHz for the protection subcarrier in the middle of the protection subcarrier between two 16m systems and 16m and the 16e.

As mentioned above, method for mapping resource by means of control channel provided by the invention, design by control channel provided by the invention, solved the problem how Broadcast Control Channel takies resource location and mode, simplified the process of terminal recognition Broadcast Control Channel, guaranteed spectrum efficiency based on the wireless communication system of OFDMA technology.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method for mapping resource of control channel in the communication system is characterized in that, comprising:

The resource mapping process of Broadcast Control Channel place subframe is different with the resource mapping process of non-Broadcast Control Channel place subframe;

The resource mapping process of described non-described Broadcast Control Channel place subframe is indicated by the control information in the described Broadcast Control Channel.

2. method according to claim 1 is characterized in that, described Broadcast Control Channel comprises main Broadcast Control Channel and/or auxilliary Broadcast Control Channel.

3. method according to claim 1, it is characterized in that, the OFDMA number of symbols that comprises in the subframe of described Broadcast Control Channel place is determined by the length of the Cyclic Prefix that described communication system adopts, perhaps adopt fixed value, wherein, described OFDMA number of symbols adopts fixed value to be meant: the length of the Cyclic Prefix that OFDMA number of symbols that comprises in the subframe of described Broadcast Control Channel place and described communication system adopt is irrelevant.

4. method according to claim 3, it is characterized in that, the OFDMA number of symbols that described Broadcast Control Channel takies is determined by the length of the Cyclic Prefix that described communication system adopts, perhaps adopt fixed value, wherein, the OFDMA number of symbols that takies of described Broadcast Control Channel adopts fixed value to be meant: the OFDMA number of symbols that described Broadcast Control Channel takies has nothing to do with the length of the Cyclic Prefix that described communication system adopts.

5. method according to claim 1 is characterized in that, the resource mapping process of described Broadcast Control Channel place subframe is meant: the resource mapping process of the OFDMA symbol that described Broadcast Control Channel takies in its place subframe.

6. method according to claim 2, it is characterized in that different being meant of resource mapping process of the resource mapping process of described Broadcast Control Channel place subframe and non-described Broadcast Control Channel place subframe: the resource mapping process of described Broadcast Control Channel place subframe or described Broadcast Control Channel place frequency partition is not indicated in described control information.

7. method according to claim 6 is characterized in that, described method also comprises: the resource mapping process that sets in advance described Broadcast Control Channel place subframe.

8. method according to claim 7 is characterized in that, the described resource mapping process that sets in advance described Broadcast Control Channel place subframe comprises:

From the subframe of Broadcast Control Channel place, choose predetermined resource, and described predetermined resource is mapped as a frequency partition, wherein, described predetermined resource all is mapped as the distributed logic Resource Unit, perhaps, described predetermined resource is mapped as distributed logic Resource Unit and continous way logical resource unit;

Wherein, the band width in physical that described predetermined resource takies is less than or equal to minimum system bandwidth, and perhaps, the frequency difference in the described predetermined resource between any two subcarriers is less than or equal to minimum system bandwidth.

9. method according to claim 8 is characterized in that, the resource mapping process of Broadcast Control Channel place frequency partition comprises:

Described main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of described frequency partition;

Perhaps, described main Broadcast Control Channel begins to take P distributed logic Resource Unit continuously to the direction of first distributed logic Resource Unit of described frequency partition from last distributed logic Resource Unit of described frequency partition;

Wherein, P gets the fixed value that sets in advance, and perhaps, the value of P is determined one of at least by following information: the number of repetition that system bandwidth, base station type, main Broadcast Control Channel adopt.

10. method according to claim 9 is characterized in that,

Described auxilliary Broadcast Control Channel takies the distributed logic Resource Unit, and the distributed logic Resource Unit that takies with described main Broadcast Control Channel is adjacent or non-conterminous;

If the distributed logic Resource Unit that distributed resource units that described auxilliary Broadcast Control Channel takies and described main Broadcast Control Channel take is non-conterminous, indicate the quantity and/or the position of the distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies by described main Broadcast Control Channel;

If the distributed logic Resource Unit that distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies and described main Broadcast Control Channel take is adjacent, indicate the quantity of the distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies by described main Broadcast Control Channel.

11. method according to claim 8, it is characterized in that, one of at least described predetermined resource is mapped as a frequency partition by following steps: sub-band division, the displacement of little band, frequency partition are divided, division, the subcarrier permutation of distributed resource units and continous way Resource Unit in the frequency partition.

12. method according to claim 8, it is characterized in that, the described predetermined resource of choosing comprises: with k physical resource unit in n the physical resource unit of described communication system as described predetermined resource, wherein, a described n physical resource unit is one of following: the total system bandwidth corresponding physical Resource Unit of described communication system, any minimum system bandwidth corresponding physical Resource Unit in the total bandwidth of described communication system, state the primary synchronization channel occupied bandwidth corresponding physical Resource Unit of communication system, wherein, n and k are natural number, and k is less than or equal to n.

13. method according to claim 12, it is characterized in that, one of in such a way choose a described k physical resource unit: choose a described k physical resource unit continuously, choose a described k physical resource unit from the both sides of a described n physical resource unit continuously, choose a described k physical resource unit from the centre of a described n physical resource unit continuously, from a described n physical resource unit, equally spaced choose a described k physical resource unit from a side of a described n physical resource unit.

14. method according to claim 7 is characterized in that, described method also comprises:

Set in advance the resource mapping process of other resource except that described predetermined resource in the subframe of described Broadcast Control Channel place; Perhaps,

Indicate the resource mapping process of other resource except that described predetermined resource in the subframe of described Broadcast Control Channel place by the control information in the described Broadcast Control Channel.

15. method according to claim 14, it is characterized in that, comprise one or more indication field in the described control information, wherein, described indication field carries following information one of at least: the number of continuous resource unit in the number of distributed resource units, each frequency partition in the number of little band, each frequency partition in the number of subband, each frequency partition in the number of the frequency partition in the resource in the subframe of described Broadcast Control Channel place except that described predetermined resource, the size of each frequency partition, each frequency partition.

16. method according to claim 1, it is characterized in that, indicate by described control information and to comprise: the resource mapping of indicating described non-described Broadcast Control Channel place subframe by the indication field in the described control information, wherein, described indication field carries following information one of at least: the number of described non-described Broadcast Control Channel place subframe medium frequency subregion, the size of each frequency partition, the number of subband in each frequency partition, the number of little band in each frequency partition, the number of distributed resource units in each frequency partition, the number of continuous resource unit in each frequency partition.

17., it is characterized in that described indication field represents that by binary bits all or part of of the number of required binary bits fixed according to claim 15 or 16 described methods; Perhaps, all or part of of the number of required binary bits determined according to one of following information or combination: the number of system bandwidth, frequency partition, the size of frequency partition.

18. the method for mapping resource of control channel in the communication system, the frame structure support of described communication system is with reference to communication system or with reference to the terminal of communication system, wherein, described communication system is described evolution system with reference to communication system, it is characterized in that described method comprises:

The Broadcast Control Channel of described communication system and/or synchronizing channel are positioned on the partial-band of system bandwidth of described communication system;

Wherein, described partial-band is positioned on the center frequency-band or edge band of system bandwidth of described communication system.

19. method according to claim 18 is characterized in that, described Broadcast Control Channel comprises main Broadcast Control Channel and/or auxilliary Broadcast Control Channel, and described synchronizing channel comprises primary synchronization channel and/or auxiliary synchronization channel.

20. method according to claim 18, it is characterized in that, the OFDMA number of symbols that comprises in the subframe of described Broadcast Control Channel place is determined by the length of the Cyclic Prefix that described communication system adopts, perhaps adopt fixed value, wherein, described OFDMA number of symbols adopts fixed value to be meant: the length of the Cyclic Prefix that OFDMA number of symbols that comprises in the subframe of described Broadcast Control Channel place and described communication system adopt is irrelevant.

21. method according to claim 20, it is characterized in that, the OFDMA number of symbols that described Broadcast Control Channel takies is determined by the length of the Cyclic Prefix that described communication system adopts, perhaps adopt fixed value, wherein, the OFDMA number of symbols that takies of described Broadcast Control Channel adopts fixed value to be meant: the OFDMA number of symbols that described Broadcast Control Channel takies has nothing to do with the length of the Cyclic Prefix that described communication system adopts.

22. method according to claim 18 is characterized in that, the resource mapping process of Broadcast Control Channel place subframe is meant: the resource mapping process of the OFDMA symbol that Broadcast Control Channel takies in its place subframe.

23. method according to claim 19 is characterized in that,

The bandwidth that described primary synchronization channel and/or described main Broadcast Control Channel take all is less than or equal to the minimum system bandwidth of described communication system; And/or,

The bandwidth that described main Broadcast Control Channel takies is less than or equal to the bandwidth that described primary synchronization channel takies; And/or,

Frequency difference between any two subcarriers that described primary synchronization channel and/or described main Broadcast Control Channel take is less than or equal to the minimum system bandwidth of described communication system.

24. method according to claim 18 is characterized in that,

When described communication system supports overloading frequently, then described synchronizing channel and/or Broadcast Control Channel are arranged on the edge band of system bandwidth of described communication system;

Perhaps,

When described communication system does not support overloading frequently, then described synchronizing channel and/or Broadcast Control Channel are arranged on the center frequency-band of system bandwidth of described communication system;

Wherein, described communication system supports that overloading is meant frequently: support a plurality of carrier frequency on the continuous bandwidth part of system bandwidth or system bandwidth, and wherein at least one carrier frequency is supported describedly with reference to communication system, and it is one of following that the continuous bandwidth of described system bandwidth or system bandwidth partly comprises: 10MHz, 15MHz, the integral multiple of the minimum system bandwidth of 20MHz, described communication system continuously continuously continuously.

25., it is characterized in that for described synchronizing channel, described method also comprises according to each described method in the claim 18 to 24:

In the OFDMA symbol at described synchronizing channel place, side from system bandwidth is chosen a frequency band, wherein, the width of described frequency band is less than or equal to the frequency bandwidth of minimum system bandwidth, and chooses k1 physical sub-carrier as described edge band from n1 available physical subcarrier of described frequency band correspondence;

28. method according to claim 26, it is characterized in that, one of in such a way choose a described k2 physical resource unit: choose a described k2 physical resource unit continuously, choose a described k2 physical resource unit from the both sides of a described n2 physical resource unit continuously, choose a described k2 physical resource unit from the centre of a described n2 physical resource unit continuously, from a described n2 physical resource unit, equally spaced choose a described k2 physical resource unit from a side of a described n2 physical resource unit.

29. method according to claim 28 is characterized in that, described continuous bandwidth refers to: the bandwidth corresponding physical Resource Unit that the primary synchronization channel of described system bandwidth, described communication system takies.

30. method according to claim 28, it is characterized in that, described method also comprises: a described k2 physical resource unit is mapped as a frequency partition, wherein, a described k2 physical resource unit all is mapped as the distributed logic Resource Unit, perhaps, a described k2 physical resource unit is mapped as distributed logic Resource Unit and continous way logical resource unit.

31. method according to claim 27 is characterized in that, described method also comprises: the resource mapping process that sets in advance other resource except that a described k2 physical resource unit in the subframe of described Broadcast Control Channel place; Perhaps, indicate the resource mapping process of other resource except that a described k2 physical resource unit in the subframe of described Broadcast Control Channel place by the control information in the described Broadcast Control Channel.

32. method according to claim 28, it is characterized in that, described method also comprises: described main Broadcast Control Channel begins to take continuously P distributed logic Resource Unit from first distributed logic Resource Unit of described frequency partition, perhaps, described main Broadcast Control Channel begins to take P distributed logic Resource Unit continuously to first distributed logic Resource Unit direction of described frequency partition from last distributed logic Resource Unit of described frequency partition;

33. method according to claim 18 is characterized in that,

The distributed logic Resource Unit that distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies and described main Broadcast Control Channel take is adjacent or non-conterminous;

If the distributed logic Resource Unit that distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies and described main Broadcast Control Channel take is non-conterminous, indicate the quantity and/or the position of the distributed logic Resource Unit that described auxilliary Broadcast Control Channel takies by described main Broadcast Control Channel;

34. method according to claim 30, it is characterized in that, one of at least a described k2 physical resource unit is mapped as a frequency partition by following steps: sub-band division, the displacement of little band, frequency partition are divided, distributed resource units and the continous way Resource Unit is divided, subcarrier permutation in the frequency partition.

35. method according to claim 19 is characterized in that,

The information of carrying in bandwidth location that occupies according to described primary synchronization channel or the described synchronizing channel is determined the bandwidth location of described Broadcast Control Channel, wherein, described information comprises one of following: whether the system bandwidth of described communication system, described communication system are supported described with reference to communication system, multi-carrier-frequency mode.

36. method according to claim 24 is characterized in that, multi-carrier-frequency mode is meant: utilize the division methods of predetermined division method or binary bits indication supporting that carrying out carrier frequency on the continuous bandwidth that overloading is operated frequently divides.