CN101409702A - Method for selecting wireless resource block offset by sender - Google Patents
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- CN101409702A CN101409702A CNA2007101808010A CN200710180801A CN101409702A CN 101409702 A CN101409702 A CN 101409702A CN A2007101808010 A CNA2007101808010 A CN A2007101808010A CN 200710180801 A CN200710180801 A CN 200710180801A CN 101409702 A CN101409702 A CN 101409702A
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Abstract
The invention discloses a wireless resource block offset selecting method of a sender which is applied to an orthogonal frequency division multiplexed system and is used by the sender for automatically deciding the offset of the wireless resource block. The method is characterized in that: when an offset set is determined, the sender sends data to a receiving side at a wireless resource block that is corresponding to the initial offset; the sender selects and regulates the offset in the offset set; the sender sends data to the receiving side at the wireless resource block that is corresponding to the selected offset. The method is applied to the forth generation mobile communication system.
Description
Technical field
The present invention relates to the access technology in the communication system, relate in particular to the method for a kind of sender-selected wireless RB (Resource Block, Resource Block) side-play amount.
Background technology
Along with the evolution of cellular system, OFDMA (Orthogonal Frequency Division MultipleAccess, OFDM inserts) system becomes the mainstream technology of following wide-band mobile communication gradually.OFDM (Orthogonal Frequency Division Multiplexing, OFDM) core concept of system is, utilize IFFT (invert fast fourier transformation) with data stream modulates on a plurality of subcarriers, frequency response to channel is cut apart, and makes it to become parallel, independent approximate memoryless a plurality of subchannels.Therefore, the basic Radio Resource of ofdm system is frequency and time (or time interval), if matching coding technology and multi-antenna technology, ofdm system can also obtain extra code source or space resources, utilize the OFDM orthogonal time frequency resources to obtain the multiple access transmittability, this system is the OFDMA system.
Reducing expense is the important means that wireless communication system obtains higher spectrum efficiency, same subcarrier frequency at interval down, system bandwidth is big more, sub-carrier number is many more, the expense of transmitting assigned subcarrier for multiple access is just big more, simultaneously, on the one hand, once transmit the big data of trying one's best, can reduce overhead, on the other hand, the data length of most of business is not what fix, therefore the design resource piece makes it to carry the business of smaller length, simultaneously a plurality of Resource Block combinations can be transmitted the business than length, is very important.For example RB of definition comprises 12 subcarriers and the 1ms time interval in LTE (Long Term Evolution, Long Term Evolution) system, and the sub-carrier configuration among the RB is changeless.
In order to improve the availability of frequency spectrum, wireless communication system can adopt Adaptive Modulation and Coding scheme (MCS) according to channel condition, MCS normally classifies and is limited, base station and terminal can adopt a plurality of RB to transmit a data block (TB, transport block), in order to reduce notification overhead, different RB adopts identical MCS in the TB.When the sub-carrier configuration among the RB of system immobilizes, because in most cases its channel has frequency selection and time selectivity, and the resource that TB takies is the local channel resource, and is then not necessarily optimum for the MCS of TB distribution, thereby causes the availability of frequency spectrum to descend.
Summary of the invention
Technical problem to be solved by this invention is the method that is to provide a kind of selecting wireless resource block offset by sender, decides the side-play amount of wireless resource block in its sole discretion in order to transmit leg.
In order to solve the problems of the technologies described above, the invention provides a kind of method of selecting wireless resource block offset by sender, be applied to ofdm system, comprising:
(1) determine the set of side-play amount after, transmit leg sends data to the recipient on an initial offset corresponding radio resource piece;
(2) side-play amount is selected and adjusted to described transmit leg in described side-play amount set;
(3) described transmit leg sends data to described recipient on the wireless resource block of selected side-play amount correspondence.
In the said method, described step (3) may further include, and described transmit leg turns back to step (2) and continues to carry out, to form dynamic adjustment side-play amount after sending data on the wireless resource block of selected side-play amount correspondence.
In the said method, described wireless resource block can comprise: running time-frequency resource, one or whole combinations in running time-frequency resource and code source or the space resources.
In the said method step (1), described definite side-play amount set can comprise according to the radio-resource-configuration attribute in the described wireless resource block and determining.
Further, described radio-resource-configuration attribute is the radio-resource-configuration mode in the described wireless resource block, can comprise:
Mode one, the described wireless resource block configuration of all of ofdm system is identical;
Mode two, the described wireless resource block configuration of ofdm system is different.
Further, according to the radio-resource-configuration attribute in the described wireless resource block, determine that described side-play amount set can comprise:
Radio-resource-configuration mode in the described wireless resource block be described mode for the moment, select part or all of side-play amount among 0～A-1 as the element in the described side-play amount set, wherein, A is the sub-carrier number in the described wireless resource block; And
When the radio-resource-configuration mode in the described wireless resource block is described mode two, select part or all of side-play amount among 0～B-1 as the element in the described side-play amount set, wherein, B is the total number of sub-carriers in the ofdm system.
In the said method step (2), described transmit leg can be finished in described side-play amount set and select and adjust side-play amount by the transmission quality under the current side-play amount of assessment.
Further, in described side-play amount set, select side-play amount in the step (2), can comprise that described transmission quality is lower than one of setting described transmit leg when sending quality threshold and begins to select side-play amount in described side-play amount set, till the transmission quality of data under the selected side-play amount takes a turn for the better; Perhaps described transmit leg is chosen an optimized migration amount and is made under this side-play amount that the transmission of data is best in quality in the set of described side-play amount till.
And transmit leg described in the step (2) can be estimated the described transmission quality of assessment according to sending quality evaluation.Further, described transmission quality evaluation is estimated and can be comprised frame error rate, bit error rate or number of retransmissions.Further, described transmission quality evaluation is estimated and can be obtained according to the affirmation information or the metrical information of described recipient's feedback, and perhaps the number of retransmissions according to described transmit leg obtains.
And, in the step (2) adjustment cycle can be set further, to each adjustment cycle, described transmit leg is finished in each adjustment cycle in described side-play amount set and is selected and adjust side-play amount all by the transmission quality under the current side-play amount of assessment.
In the said method step (2), side-play amount be selected and be adjusted to described transmit leg can all to each adjustment cycle by an adjustment cycle is set in described side-play amount set.Further, to each adjustment cycle, described transmit leg all can be finished in each adjustment cycle in described side-play amount set and be selected and adjust side-play amount by the transmission quality under the current side-play amount of assessment in the step (2).
In the said method step (2), described sender-selected side-play amount can comprise in the mode of attempting and carrying out, and sends data on the pairing wireless resource block of attempting of side-play amount, and detects the transmission quality, adjusts side-play amount with this.
In the said method step (2), described adjustment side-play amount can comprise that described transmit leg after the selection side-play amount, according to the predetermined migration mapping mode, changes the subcarrier composition that comprises in the part or all of wireless resource block in described side-play amount set.
Further, described predetermined migration mapping mode can comprise, under specific side-play amount, and the logical number of continuous sub-carriers and the physically mapping relations of the physics numbering of discrete subcarrier in logic; Wherein, the logical number of the numbering of described in advance definition wireless resource block and corresponding subcarrier.
Further, when described wireless resource block was static, the mapping relations of the logical number of the subcarrier in the described wireless resource block and physics numbering can be identical under different side-play amounts.
The inventive method has realized that transmit leg is by dynamically adjusting, decide the side-play amount of wireless resource block in its sole discretion, so that adopt the wireless communication system entire throughput or the availability of frequency spectrum of OFDM (OFDM) technology bigger, be specially adapted in the 4th third-generation mobile communication system.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
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 method embodiment step schematic diagram of selecting wireless resource block offset by sender of the present invention.
Fig. 2 is the step schematic diagram of an application example of the inventive method.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.Should be appreciated that the following stated only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Relate to wireless resource block (RB) among the present invention, below at first RB is described in detail.
(1) RB can be divided into two classes by configuration
Radio-resource-configuration mode in the wireless resource block comprises following two kinds: mode one, and all wireless resource block configurations of ofdm system are identical; Mode two, the wireless resource block configuration of ofdm system is different.Correspondingly, RB can be divided into two classes by configuration: the wireless resource block configuration of all ofdm systems in the first kind wireless resource block is identical, promptly adopt above-mentioned mode one, that is to say, the wireless resource block of ofdm system running time-frequency resource at least has only a kind of size configure, sub-carrier number among the different RB is the same, and the OFDM symbolic number that comprises also is the same; The wireless resource block configuration of the ofdm system in the second class wireless resource block is different, promptly adopts above-mentioned mode two.
(2) RB distributes by subcarrier and can be divided into two classes
Centralized RB:, claim that then this RB is centralized RB if the sub-carrier frequencies among the RB is continuous;
Distributed RB: the RB except that centralized RB.
(3) RB is divided into two classes according to pattern
Dynamic RB: dynamically the subcarrier composition that comprises among the RB is variable;
Static RB: the subcarrier composition that comprises among the static RB is immutable.
(4) RB is according to attributive classification
Logic (or virtual) RB: the subcarrier that comprises in this RB is virtual, and the logical sub carrier index is continuous, and the logical sub carrier wave is always constant in particular number RB;
Physics RB: what comprise in this RB is physical sub-carrier, and the physical sub-carrier numbering is not necessarily continuous among the RB of particular number, and physical sub-carrier can be always constant in particular number RB, also can change.
Wherein, there are specific mapping relations in logical sub carrier index and physical sub-carrier among logic (or virtual) RB, and under the different side-play amounts, these mapping relations can be the same or different.
In addition, the transmit leg of hereinafter mentioning can be the base station (Base Station, BS) or access point (Access Point, AP), the recipient can be terminal (User Equipment, UE).
Based on above content, as shown in Figure 1, the method embodiment of selecting wireless resource block offset by sender of the present invention comprises following processing:
Step 101, determine the set of side-play amount after, transmit leg sends data to the recipient on an initial offset corresponding radio resource piece;
Step 102, transmit leg select and adjust side-play amount in the side-play amount set;
Step 103, transmit leg sends data to the recipient on the wireless resource block of selected side-play amount correspondence.
In above-mentioned steps 102, transmit leg can be finished and select and adjust side-play amount by the transmission quality of data under the current side-play amount of assessment; A side-play amount adjustment cycle also can be set,,, all side-play amount be selected and adjusted regardless of the transmission quality of data under the current side-play amount in each cycle; And, select and adjust side-play amount according to sending the quality situation, and select and adjust side-play amount, can merge according to adjustment cycle, also promptly in each cycle, assess the transmission quality of data under the current side-play amount,, in this cycle, just select so and adjust if be lower than current transmission quality threshold, up to obtaining satisfactory side-play amount, and when next cycle,, still side-play amount is selected and adjusted regardless of the transmission quality of data under the current side-play amount.
Below will specifically describe each details in the above-mentioned processing.
The Resource Block of above-mentioned ofdm system refers to time-frequency (being the time or the time interval and frequency or subcarrier) resource, or one or two the combination in running time-frequency resource and code source, the space resources, and the frequency resource of OFDM refers to the subcarrier set in the ofdm system.
In step 101, determine a side-play amount set according to the radio-resource-configuration attribute in the wireless resource block, the radio-resource-configuration attribute is the radio-resource-configuration mode among the RB, comprising: mode one, all RB configurations of ofdm system are identical; Mode two, the RB configuration of ofdm system is different.
Correspondingly, in step 101, side-play amount belongs to the side-play amount set, the processing of determining the side-play amount set is specially: the mode of the radio-resource-configuration in RB is mode a period of time, part or all of side-play amount among selection 0～A-1 is as the element in the side-play amount set, wherein, A is the sub-carrier number among the RB; When the mode of the radio-resource-configuration among the RB was mode two, the part or all of side-play amount among selection 0～B-1 was as the element in the side-play amount set, and wherein, B is the total number of sub-carriers in the ofdm system.
In step 102, side-play amount be selected and be adjusted to transmit leg can by the transmission quality that assessment is adjusted after RB disposes, also be that transmit leg is according to the transmission quality that sends after (as frame error rate, number of retransmissions, bit error rate) assessment adjustment RB configuration is estimated in quality evaluation, according to the transmission quality of assessment gained, whether decision is selected and is adjusted side-play amount and how to select and adjust side-play amount again.
In step 103, the processing of the radio-resource-configuration after the adjustment side-play amount is specially: transmit leg according to the predetermined migration mapping mode, changes the subcarrier composition that comprises among the part or all of RB according to the side-play amount of selecting.
As mentioned above, the RB of ofdm system can be divided into two classes, and a class is called dynamic RB, and dynamically the subcarrier composition that comprises among the RB is variable, another kind ofly is called static RB, and the subcarrier composition that comprises among the static RB is immutable.RB in the ofdm system can only have static RB, also dynamic RB can only be arranged, and can also static RB also be arranged existing dynamic RB.In addition, the ofdm system subcarrier is by the ascending numbering of frequency, claim this to be numbered the physics numbering, subcarrier number among the RB is the subcarrier logical number, for centralized RB, side-play amount is that 0 o'clock logical number is identical with the physics numbering, for distributed RB, side-play amount is 0 o'clock, and there are the mapping relations of determining in logical number and physics numbering.
Based on this, above-mentioned predetermined migration mapping mode comprises: under specific side-play amount, and the logical number of continuous sub-carriers (logical number of the subcarrier that RB is interior is continuous) and the physically mapping relations of the physics numbering (the physics numbering is corresponding with the actual frequency of subcarrier) of discrete subcarrier in logic.
Wherein, need the numbering of pre-defined RB and the logical number of corresponding subcarrier.A kind of mode of definition is to number the logical number of the subcarrier among the big RB always greater than the logical number of the little RB subcarrier of numbering, and for example: RB0 comprises LSC0～11, and VRB1 comprises LSC12～23 ....In addition, when having static RB, the logical number of the subcarrier among the static RB is identical under different side-play amounts with the mapping relations of physics numbering.
In step 103 and step 104, to send the measured side-play amount of matter and on the wireless resource block of adjusted side-play amount correspondence, to send data.Refer to transmit leg and contrast the assessment result of all or part of side-play amount RB configuration transmission quality down, therefrom select preferred RB configuration, and according to the configuration of the RB under this side-play amount transmission data; Perhaps reach specific and estimate the RB that promptly thinks more than the lower limit under this side-play amount and be configured to preferred configuration, and send data according to the configuration of the RB under this side-play amount when sending quality.
Below will further describe embodiments of the invention by example.
As shown in Figure 2, an example of the present invention comprises following treatment step:
Step 201 is determined a side-play amount set according to the radio-resource-configuration attribute in the wireless resource block.
Suppose that ofdm system carrying data frequency resource bandwidth is 9MHz, subcarrier spacing is 15KHz, is 600 except the useful sub-carrier number of direct current (being the 0Hz subcarrier) then, setting from-4.5MHz is to 4.5MHz, subcarrier (sub-carrier) is numbered SC0～SC599,50 Resource Block (RB0～RB49), each RB comprises 12 subcarriers, and the side-play amount set is for { 0,1,2,3,4,5,6,7,8,9,10,11}, RB is the centralised allocation pattern, and promptly the subcarrier among each RB is continuous, as corresponding and 0 side-play amount, RB0 comprises subcarrier SC0, SC1, ..., SC11, RB1 comprises SC12, SC13, ..., SC23, and the like, the subcarrier number difference that different RB comprises.RB can also be the distributed allocation pattern, promptly, set up the numbering of continuous sub-carriers in logic (as the LSC0～LSC599) and the mapping relations of discrete subcarrier number physically, for example with the m+12 * n logical sub carrier wave and the m * 50+n physical sub-carrier correspondence, m=0～11 wherein, n=0～49.Under the distributed allocation pattern, corresponding to 0 side-play amount, RB0 comprises subcarrier LSC0, LSC1 ..., LSC11, RB1 comprise LSC12, LSC13 ..., LSC23, and the like.It is respectively that 1# is (QPSK that ofdm system modulation coding mode (MCS) is divided into 6 kinds, the 1/3Turbo sign indicating number), 2# is (QPSK, a 1/2Turbo sign indicating number), 3# is (16QAM, the 1/3Turbo sign indicating number), 4# is (16QAM, a 1/2Turbo sign indicating number), 5# is (64QAM, the 1/3Turbo sign indicating number), 6# is (64QAM, a 1/2Turbo sign indicating number).
Step 205 if the side-play amount adjustment finishes, then carry out step 206, if the side-play amount adjustment not have end then to proceed selection and adjustment in the step 204.
In the said process, the selection of side-play amount can be undertaken by the mode of attempting, and sends data on the pairing RB of side-play amount that attempts, and detects the transmission quality, chooses required side-play amount with this.
Like this, by means of the present invention, realized selecting wireless resource block offset by sender, on this basis, can be by changing the sub-carrier configuration among the RB, make in the ofdm system bandwidth and to optimize for one or more recipients on the channel capacity statistical significance based on the subchannel of RB bandwidth, and then improved the throughput of system transmissions.
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 and replace or improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1, a kind of method of selecting wireless resource block offset by sender is applied to ofdm system, it is characterized in that, comprising:
(1) determine the set of side-play amount after, transmit leg sends data to the recipient on an initial offset corresponding radio resource piece;
(2) side-play amount is selected and adjusted to described transmit leg in described side-play amount set;
(3) described transmit leg sends data to described recipient on the wireless resource block of selected side-play amount correspondence.
2, the method for claim 1 is characterized in that, described step (3) comprises that further described transmit leg turns back to step (2) and continues to carry out, to form dynamic adjustment side-play amount after sending data on the wireless resource block of selected side-play amount correspondence.
3, the method for claim 1 is characterized in that, described wireless resource block comprises: running time-frequency resource, one or whole combinations in running time-frequency resource and code source or the space resources.
4, the method for claim 1 is characterized in that, determines the side-play amount set described in the step (1), comprises according to the radio-resource-configuration attribute in the described wireless resource block and determining.
5, method as claimed in claim 4 is characterized in that, described radio-resource-configuration attribute is the radio-resource-configuration mode in the described wireless resource block, comprising:
Mode one, the described wireless resource block configuration of all of ofdm system is identical;
Mode two, the described wireless resource block configuration of ofdm system is different.
6, method as claimed in claim 5 is characterized in that, according to the radio-resource-configuration attribute in the described wireless resource block, determines that described side-play amount set comprises:
Radio-resource-configuration mode in the described wireless resource block be described mode for the moment, select part or all of side-play amount among 0～A-1 as the element in the described side-play amount set, wherein, A is the sub-carrier number in the described wireless resource block; And
When the radio-resource-configuration mode in the described wireless resource block is described mode two, select part or all of side-play amount among 0～B-1 as the element in the described side-play amount set, wherein, B is the total number of sub-carriers in the ofdm system.
7, the method for claim 1 is characterized in that, transmit leg described in the step (2) is finished in described side-play amount set and selected and adjust side-play amount by the transmission quality under the current side-play amount of assessment.
8, method as claimed in claim 7, it is characterized in that, in described side-play amount set, select side-play amount in the step (2), comprise that described transmission quality is lower than one of setting described transmit leg when sending quality threshold and begins to select side-play amount in described side-play amount set, till the transmission quality of data under the selected side-play amount takes a turn for the better; Perhaps described transmit leg is chosen an optimized migration amount and is made under this side-play amount that the transmission of data is best in quality in the set of described side-play amount till.
9, method as claimed in claim 7 is characterized in that, transmit leg described in the step (2) is estimated the described transmission quality of assessment according to sending quality evaluation.
10, method as claimed in claim 9 is characterized in that, described transmission quality evaluation is estimated and comprised frame error rate, bit error rate or number of retransmissions.
11, method as claimed in claim 10 is characterized in that, affirmation information or metrical information that described transmission quality evaluation is estimated according to described recipient's feedback obtain, and perhaps the number of retransmissions according to described transmit leg obtains.
12, method as claimed in claim 7, it is characterized in that, an adjustment cycle further is set in the step (2), to each adjustment cycle, described transmit leg is finished in each adjustment cycle in described side-play amount set and is selected and adjust side-play amount all by the transmission quality under the current side-play amount of assessment.
13, the method for claim 1 is characterized in that, side-play amount is selected and adjusted to transmit leg described in the step (2) all by an adjustment cycle is set to each adjustment cycle in described side-play amount set.
14, want 13 described methods as right, it is characterized in that, to each adjustment cycle, described transmit leg is finished in each adjustment cycle in described side-play amount set and is selected and adjust side-play amount all by the transmission quality under the current side-play amount of assessment in the step (2).
15, the method for claim 1 is characterized in that, sender-selected side-play amount described in the step (2), comprise in the mode of attempting and carrying out, on the pairing wireless resource block of attempting of side-play amount, send data, and detect the transmission quality, adjust side-play amount with this.
16, the method for claim 1, it is characterized in that step is adjusted side-play amount described in (2), comprise that described transmit leg is in the set of described side-play amount after the selection side-play amount, according to the predetermined migration mapping mode, change the subcarrier composition that comprises in the part or all of wireless resource block.
17, method as claimed in claim 16 is characterized in that, described predetermined migration mapping mode comprises, under specific side-play amount, and the logical number of continuous sub-carriers and the physically mapping relations of the physics numbering of discrete subcarrier in logic; Wherein, the logical number of the numbering of described in advance definition wireless resource block and corresponding subcarrier.
18, method as claimed in claim 17 is characterized in that, when described wireless resource block was static, the logical number of the subcarrier in the described wireless resource block was identical under different side-play amounts with the mapping relations of physics numbering.
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| CN116436587A (en) * | 2023-06-14 | 2023-07-14 | 芯迈微半导体(上海)有限公司 | Resource mapping method and device of control channel and resource demapping method and device |
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| CN100516908C (en) * | 2003-05-14 | 2009-07-22 | 高通股份有限公司 | Power control and scheduling in an OFDM system |
| CN1937603A (en) * | 2005-09-20 | 2007-03-28 | 株式会社Ntt都科摩 | Communication method based on sub-carrier distribution manner and communication system |
| CN1960557B (en) * | 2005-11-03 | 2010-11-10 | 上海原动力通信科技有限公司 | Method for reducing interference between sectors in orthogonal frequency division multiplex system |
| CN101035105B (en) * | 2007-04-06 | 2010-11-03 | 西安电子科技大学 | Method and device for reserving the sub-carrier to reduce the peak average power ratio of the OFDM system based on IFFT/FFT |
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| CN116436587A (en) * | 2023-06-14 | 2023-07-14 | 芯迈微半导体(上海)有限公司 | Resource mapping method and device of control channel and resource demapping method and device |
| CN116436587B (en) * | 2023-06-14 | 2023-09-05 | 芯迈微半导体(上海)有限公司 | Resource mapping method and device of control channel and resource demapping method and device |
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