CN101162921B - Frequency hopping sequence generating method and frequency hopping resource allocation method using the same - Google Patents
Frequency hopping sequence generating method and frequency hopping resource allocation method using the same Download PDFInfo
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- CN101162921B CN101162921B CN200710167785A CN200710167785A CN101162921B CN 101162921 B CN101162921 B CN 101162921B CN 200710167785 A CN200710167785 A CN 200710167785A CN 200710167785 A CN200710167785 A CN 200710167785A CN 101162921 B CN101162921 B CN 101162921B
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Abstract
The invention discloses a generation method of a frequency hopping sequence. The method includes the following steps: a channel bandwidth is divided into a plurality of logic sub bands and an initial phase of the appointed logic sub bands is obtained. The phase at the first hopping time point is fixed according to the initial phase and an appointed sub band shift value of intraframe frequency hopping. The succedent phase at each hopping time point is fixed to generate the frequency hopping sequence according to the phase at the first hopping time point, the sub band shift value of an interframe frequency hopping and a logical quantity respectively denoting the on-off of the intraframe frequency hopping and the on-off of the interframe frequency hopping. The invention also discloses a distributing method of frequency hopping resource which uses the generation method of the frequency hopping sequence. The invention simplifies the frequency hopping mode and can use resource dynamically.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to the method that single carrier-frequency division multiple access system uplink multi-users frequency hopping logical resource shines upon to physical resource among the 3GPP LTE (third generation partner program Long Term Evolution).
Background technology
In order to satisfy the demand that people are constantly developed mobile communication; Some basic requirements are being arranged aspect the selection of uplink radio transmission technology: as support scalable bandwidth; Moderate PAPR/CM (peak-to-average force ratio/cubic metric (cubic metric)) guarantees the orthogonality of uplink etc.Single carrier transmission scheme SC-FDMA (single-carrier frequency division multiple access) is owing to have lower PAPR/CM, can improve the validity of power and expands the coverage area, and becomes the basic candidate scheme of present LTE uplink.
Data transmission scheme based on the subcarrier mapping mode has two kinds: distributed frequency division multiple access (DFDMA) and centralized frequency division multiple access (LFDMA).Scheme based on distributed sub-carrier allocation in up link has higher susceptibility owing to existing to the frequency mistake; Uplink power control is had relatively high expectations; Problems such as channel estimating performance is relatively poor; Abandoned at present, but distributed sub-carrier institute natural frequency is divided the benefit of collection, still can be obtained based on the scheme of centralized subcarrier allocation mode with frequency hopping by the research of LTE.Used frequency hopping (Frequency Hopping) among the single carrier transmission scheme LFDMA-FH of most of companies recommendation, therefore both can have been guaranteed good channel estimating performance, can also obtain frequency diversity gain, and can obtain cell interference diversity gain.
As shown in Figure 1: the time point and the TTI that trigger according to frequency hopping (accomplish complete coding and decoding minimal physical unit for one; Can be called frame or subframe, be defined as the subframe of 1ms among the LTE) relation can frequency hopping be divided into two types: frequency hopping (Inter TTI FH or Intersubframe FH) between frequency hopping (Intra TTI FH or Intrasubframe FH person Inter slot FH) and subframe in the subframe.
A sub-frame is divided into the time slot (slot) of 2 0.5ms among the LTE; Frequency hopping also can be defined as the frequency hopping between time slot in the subframe; Frequency hopping in the subframe is because carry out at a complete coding and decoding minimal physical unit; So through crossing over enough frequency hopping distances, can obtain good frequency diversity gain is link gain.
Frequency hopping is between the subframe of 1ms, to accomplish between subframe, through at the different frequency hopping masterplate of different cell configuration, is used for the interference of average minizone, obtains cell interference diversity gain.
The interior frequency-hopping mode of modal frame has subband (sub-band) frequency hopping, mirror image frequency hopping and other more complicated frequency hopping modes in the LTE; Fig. 2 is the simplest 2 subbands frequency hopping of reducing by half in the subband hopping; Whole transmission bandwidth is by the even or approximate two parts that are divided into equably; The frequency hopping distance is half bandwidth, and promptly the next position of frequency hopping is current location+half bandwidth (current location is in the left half-court) or current location-half bandwidth (current location is in the right half-court).The 2 subbands frequency hopping of reducing by half can also be derived and is extended to 3 subbands, 4 subbands and even more subband hopping; Hopping scheme is complicated more; Can carry out frequency hopping according to fixing spacing; Such as 8 subband hopping (subband is numbered 0,1,2,3,4,5,6,7), the frequency hopping spacing is 3, then frequency hop sequences be 0,3,6,1,4......; Or random frequency hopping, produce the random frequency hopping sequence by random sequence such as m sequence.The advantage of subband hopping is frequency hopping fixed distance or fixing from the statistical significance, and the FH gain is identical, and easy and non-frequency hopping user carries out channeling.Shortcoming is to cause Localized (continuously) frequency spectrum to be divided into two sections or multistage possibly influence non-frequency hopping user's peak rate, also is not suitable for little bandwidth system, such as the 1.25M system.
Fig. 3 is a mirror image frequency hopping sketch map, and the mirror image frequency hopping is a refraction point with bandwidth central authorities, and next frequency hopping position is the mirror image of current location in the frequency hopping.Advantage is continuity and the single user's maximum throughput that has fully kept non-frequency hopping user, and shortcoming is: the frequency hopping distance is not fixed, and causes different user FH gain different, and some user near bandwidth central authorities might frequency hopping gain very little.
No matter be reduce by half frequency hopping or mirror image frequency hoppings of 2 subbands; Intrinsic shortcoming is all arranged; Be that solidify the frequency hopping position; Can cause reaching the optimal frequency diversity gain, but implementation is simple, with non-frequency hopping user's multiplex mode flexibly, kept the advantage of single-carrier property, make it have higher Project Realization property.
LTE interframe frequency-hopping mode both can be used for defining the Resource Block engaged position that feedback retransmits; Also can consider to be used for defining the resource location of transmission block first; The interframe frequency-hopping mode is particularly suitable for the user of semi-static or static lasting transmission; Help improving the SINR distribution performance that the sub-district covers edge customer, the cell interference diversity gain of minizone is provided.The interframe frequency-hopping mode can keep with frame in the identical mechanism of frequency-hopping mode, also can adopt with frame in the diverse pattern of frequency hopping.
Frequency-hopping mode is considered from saving signaling, needs the complete frequency-hopping mode mathematical expression of definition, or said frequency hopping formula.
Whole frequency-hopping mode is through the whether combination of switch of frequency-hopping mode in interframe frequency-hopping mode, the frame, have at least four kinds maybe: the interframe frequency-hopping mode opens+frame in frequency-hopping mode open; The interframe frequency-hopping mode is opened+the interior frequency-hopping mode of frame pass; Frequency-hopping mode is opened in the interframe frequency-hopping mode pass+frame; Frequency-hopping mode closes in the LTE interframe frequency-hopping mode pass+frame.
At least need a unified frequency-hopping mode mathematical expression or frequency hop sequences production method to comprise these four kinds possibility situation.
Directly the corresponding frequency hopping formula of definition on physical layer need specify static relatively fixing physical source distributing to give the frequency hopping user on physical layer, is unfavorable for adjusting dynamically resource division; Reduced resource utilization; Consider that simultaneously uplink also has RACH, RACH also need be carried out frequency hopping, and the frequency hopping rule of its frequency hopping rule and Traffic Channel is not quite similar; For approach avoidance conflict, may cause Traffic Channel frequency hopping formula very complicated.
In order effectively to avoid frequency-hopping mode complicated, reach and dynamically utilize resource, through the frequency-hopping mode of formulation logical resource, and, be a preferred version that addresses the above problem through the mapping scheme of logical resource to physical resource.
Therefore, the solution that needs a kind of frequency hopping sequence generating method and adopt its frequency-hopping resource to distribute can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The solution that the object of the present invention is to provide a kind of frequency hopping sequence generating method and adopt its frequency-hopping resource to distribute; Come whole the description to comprise interframe frequency-hopping mode, the interior frequency-hopping mode of frame at interior frequency-hopping mode; And through the mapping of logical resource to physical resource; Avoid frequency-hopping mode complicated, and can utilize resource dynamically.
According to an aspect of the present invention, frequency hopping sequence generating method is provided, this method may further comprise the steps: channel width is divided into a plurality of logic sub, and obtains the initial phase of the logic sub of appointment; Confirm the phase place at the first frequency hopping time point place according to the subband shift value of frequency hopping in initial phase and the predetermined frame; And according to the subband shift value of the phase place at the first frequency hopping time point place, interframe frequency hopping with represent that respectively frequency hopping ON/OFF and the open/close amount of logic of interframe frequency hopping in the frame confirm the phase place at each frequency hopping time point place subsequently, to generate frequency hop sequences.
This method adopts in the frame a kind of in the frequency hopping and interframe frequency hopping at least.
In the method, frequency hopping adopts mirror image frequency hopping or fixed intervals frequency hopping in the frame, and the interframe frequency hopping adopts fixed intervals frequency hopping or random frequency hopping.
When adopting the mirror image frequency hopping, confirm the phase place at the first frequency hopping time point place according to following formula: α (1)=(α (0)+μ k1) mod M, wherein; μ is the subband shift value of frequency hopping in the frame, and M is the quantity of a plurality of logic sub, and k1 is the open/close switching value of frequency hopping in the expression frame; And when k1 is 0; Frequency hopping is closed in the expression frame, and when k1 was 1, frequency hopping was opened in the expression frame.
When adopting the mirror image frequency hopping, be when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-2)+γ (n) k2) mod M according to following formula; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-1)+μ k1) mod M according to following formula; Wherein, α (n) representes the phase place at each frequency hopping time point place, the subband shift value of γ (n) expression interframe frequency hopping.
When adopting the fixed intervals frequency hopping, confirm according to following formula the phase place at the first frequency hopping time point place: α (1)=(α (0)+μ) mod M/2, wherein, α (0)≤M/2-1; Or α (1)=(α (0)-M/2+ μ) mod M/2+M/2, wherein, α (0)＞M/2-1; Wherein, μ is the subband shift value of frequency hopping in the frame, and M is the quantity of a plurality of logic sub, and k1 is the open/close switching value of frequency hopping in the expression frame; And represent that when k1 is 0 frequency hopping is closed in the frame, when k1 is 1, represent that frequency hopping is opened in the frame.
When adopting the fixed intervals frequency hopping, be when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-2)+γ (n) k2) mod M according to following formula; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-1)+μ k1) mod M/2 according to following formula, wherein, α (n-1)≤M/2-1; And α (n)=(α (n-1)-M/2+ μ k1) modM/2+M/2, wherein, α (n-1)＞M/2-1, wherein; α (n) representes the phase place at each frequency hopping time point place, the subband shift value of γ (n) expression interframe frequency hopping, and k1 is the open/close switching value of frequency hopping in the expression frame; And represent that when k1 is 0 frequency hopping is closed in the frame, when k1 is 1, represent that frequency hopping is opened in the frame, k2 is the open/close switching value of expression interframe frequency hopping; And when k2 was 0, expression interframe frequency hopping was closed, and represented that when k2 is 1 the interframe frequency hopping opens.
In the method, when n is zero and odd number, γ (n)=0, and γ (n) is fixed numbers or random quantity.
According to another aspect of the present invention, a kind of frequency hopping resource allocation method that adopts above-mentioned frequency hopping sequence generating method is provided, has may further comprise the steps: made the phase place at each frequency hopping point place in the frequency hop sequences corresponding one by one with each physics sub band resources; Physical Resource Block is corresponding one by one with the phase place of each physics sub band resources; And corresponding Physical Resource Block is distributed to the user who has carried out frequency hopping according to the phase place corresponding relation of band width in physical Resource Block and each physics sub band resources and the phase place at each frequency hopping point place in the frequency hop sequences and the corresponding relation of each physics sub band resources.
In the method, confirm the one-to-one relationship of the phase place of band width in physical Resource Block and each physics sub band resources: p (n) η+β～p (n) η+β+I-1 according to following formula, wherein; η representes the sum of the Physical Resource Block of each logic sub, and β representes the sub-phase place of user in each logic sub, and β ∈ { 0; 1,2 ...; η-1}, I represent the continuous physical resource number of blocks of CU, and n representes the quantity of determined frequency hopping time point.
When mirror image is arranged the band width in physical resource; The corresponding relation of the phase place at each physics sub band resources phase place and each frequency hopping point place is: the phase sequence at each frequency hopping point place of first half is corresponding to each physics sub band resources phase place of latter half, and the phase place backward at each frequency hopping point place of latter half is corresponding to each physics sub band resources phase place of first half.
When arranging the band width in physical resource with fixed intervals, the corresponding relation of the phase place at each physics sub band resources phase place and each frequency hopping point place is: α
1(n) first half is corresponding with each physics sub band resources phase sequence of first half, α
1(n) latter half is corresponding with the physical resource order that the fixed intervals frequency hopping arrives with each physics sub band resources phase place of first half; α
2(n) latter half is corresponding with each physics sub band resources phase sequence of latter half, α
2(n) first half is corresponding with the physical resource order that the fixed intervals frequency hopping arrives with each physics sub band resources phase place of latter half, wherein, and α
1(n) phase place at each frequency hopping point place of expression first half, and α
2(n) phase place at each frequency hopping point place of expression latter half.
Adopt the present invention; Unified the frequency hop sequences production method, and stipulated the frequency hopping logical resource, come whole the description to comprise interframe frequency-hopping mode, the interior frequency-hopping mode of frame at interior frequency-hopping mode to the physical resource mapping method; Can avoid frequency-hopping mode complicated, and can utilize resource dynamically.The present invention goes for the single carrier-frequency division multiple access system of bandwidth varyings such as 1.25M, 5M, 2.5M, 10M, 15M, 20M, for example DFT-S OFDM or IFDMA system.The present invention supports the high-speed mobile characteristic, goes for the application scenarios of 3km/h, 30km/h, 120km/h or higher rate travel.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 illustrates frequency hopping and interframe frequency hopping sketch map in the existing frame;
Fig. 2 illustrates the at interval 2 subbands frequency hopping sketch map that reduces by half of existing fixed;
Fig. 3 illustrates existing mirror image frequency hopping sketch map;
Fig. 4 is the flow chart that illustrates according to frequency hopping sequence generating method of the present invention;
Fig. 5 is the flow chart that illustrates according to the frequency hopping resource allocation method of employing of the present invention frequency hopping sequence generating method of the present invention;
Fig. 6 illustrates the sketch map that the logic sub resource that the present invention is based on mirror image arrangement physical resource is mapped to the method for actual physics sub band resources; And
Fig. 7 illustrates the method that the logic sub resource that the present invention is based on fixed intervals arrangement physical resource is mapped to the actual physics sub band resources.
Embodiment
To combine accompanying drawing to specify embodiments of the invention below.
Fig. 4 is the flow chart that illustrates according to frequency hopping sequence generating method of the present invention.With reference to Fig. 4, frequency hopping sequence generating method according to the present invention may further comprise the steps: step S402 is divided into a plurality of logic sub with channel width, and obtains the initial phase of the logic sub of appointment; Step S404 confirms the phase place at the first frequency hopping time point place according to the subband shift value of frequency hopping in initial phase and the predetermined frame; And step S406; According to the subband shift value of the phase place at the first frequency hopping time point place, interframe frequency hopping with represent that respectively frequency hopping ON/OFF and the open/close amount of logic of interframe frequency hopping in the frame confirm the phase place at each frequency hopping time point place subsequently, to generate frequency hop sequences.
This method adopts in the frame a kind of in the frequency hopping and interframe frequency hopping at least.
In the method, frequency hopping adopts mirror image frequency hopping or fixed intervals frequency hopping in the frame, and the interframe frequency hopping adopts fixed intervals frequency hopping or random frequency hopping.
When adopting the mirror image frequency hopping, confirm the phase place at the first frequency hopping time point place according to following formula: α (1)=(α (0)+μ k1) mod M, wherein; μ is the subband shift value of frequency hopping in the frame, and M is the quantity of a plurality of logic sub, and k1 is the open/close switching value of frequency hopping in the expression frame; And when k1 is 0; Frequency hopping is closed in the expression frame, and when k1 was 1, frequency hopping was opened in the expression frame.
When adopting the mirror image frequency hopping, be when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-2)+γ (n) k2) mod M according to following formula; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-1)+μ k1) mod M according to following formula; Wherein, α (n) representes the phase place at each frequency hopping time point place, the subband shift value of γ (n) expression interframe frequency hopping.
When adopting the fixed intervals frequency hopping, confirm according to following formula the phase place at the first frequency hopping time point place: α (1)=(α (0)+μ) mod M/2, wherein, α (0)≤M/2-1; Or α (1)=(α (0)-M/2+ μ) mod M/2+M/2, wherein, α (0)＞M/2-1; Wherein, μ is the subband shift value of frequency hopping in the frame, and M is the quantity of a plurality of logic sub, and k1 is the open/close switching value of frequency hopping in the expression frame; And represent that when k1 is 0 frequency hopping is closed in the frame, when k1 is 1, represent that frequency hopping is opened in the frame.
When adopting the fixed intervals frequency hopping, be when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-2)+γ (n) k2) mod M according to following formula; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at each frequency hopping point place: α (n)=(α (n-1)+μ k1) mod M/2 according to following formula, wherein, α (n-1)≤M/2-1; And α (n)=(α (n-1)-M/2+ μ k1) modM/2+M/2, wherein, α (n-1)＞M/2-1, wherein; α (n) representes the phase place at each frequency hopping time point place, the subband shift value of γ (n) expression interframe frequency hopping, and k1 is the open/close switching value of frequency hopping in the expression frame; And represent that when k1 is 0 frequency hopping is closed in the frame, when k1 is 1, represent that frequency hopping is opened in the frame, k2 is the open/close switching value of expression interframe frequency hopping; And when k2 was 0, expression interframe frequency hopping was closed, and represented that when k2 is 1 the interframe frequency hopping opens.
In the method, when n is zero and odd number, γ (n)=0, and γ (n) is fixed numbers or random quantity.
Fig. 5 is the flow chart that illustrates according to the frequency hopping resource allocation method of employing of the present invention frequency hopping sequence generating method of the present invention.With reference to Fig. 5, may further comprise the steps according to the frequency hopping resource allocation method of employing of the present invention frequency hopping sequence generating method of the present invention: step S502 makes the phase place at each frequency hopping point place in the frequency hop sequences corresponding one by one with each physics sub band resources; Step S504 is corresponding one by one with the phase place of each physics sub band resources with Physical Resource Block; And step S506, corresponding Physical Resource Block is distributed to the user who has carried out frequency hopping according to the phase place corresponding relation of band width in physical Resource Block and each physics sub band resources and the phase place at each frequency hopping point place in the frequency hop sequences and the corresponding relation of each physics sub band resources.
In the method, confirm the one-to-one relationship of the phase place of band width in physical Resource Block and each physics sub band resources: p (n) η+β～p (n) η+β+I-1 according to following formula, wherein; η representes the sum of the Physical Resource Block of each logic sub, and β representes the sub-phase place of user in each logic sub, and β ∈ { 0; 1,2 ...; η-1}, I represent the continuous physical resource number of blocks of CU, and n representes the quantity of determined frequency hopping time point.
When mirror image is arranged the band width in physical resource; The corresponding relation of the phase place at each physics sub band resources phase place and each frequency hopping point place is: the phase sequence at each frequency hopping point place of first half is corresponding to each physics sub band resources phase place of latter half, and the phase place backward at each frequency hopping point place of latter half is corresponding to each physics sub band resources phase place of first half.
When arranging the band width in physical resource with fixed intervals, the corresponding relation of the phase place at each physics sub band resources phase place and each frequency hopping point place is: α
1(n) first half is corresponding with each physics sub band resources phase sequence of first half, α
1(n) latter half is corresponding with the physical resource order that the fixed intervals frequency hopping arrives with each physics sub band resources phase place of first half; α
2(n) latter half is corresponding with each physics sub band resources phase sequence of latter half, α
2Each physics sub band resources phase place of first half and latter half corresponding with the physical resource order that the fixed intervals frequency hopping arrives, wherein, α
1(n) phase place at each frequency hopping point place of expression first half, and α
2(n) phase place at each frequency hopping point place of expression latter half.
One embodiment of the present of invention are described below.In the present embodiment, frequency hopping can be turn-offed separately or open in interframe frequency hopping, the frame.Present embodiment provides a kind of frequency hop sequences production method, adopts mirror image frequency hopping or fixed intervals frequency hopping to be divided into two types according to frequency hopping in the frame.
When adopting mirror method, generate frequency hop sequences and may further comprise the steps for frequency hopping in the frame:
In the above-mentioned formula:
α (n) n=0,1,2 ... be the phase place of pointing out each frequency hopping time of user logic subband, wherein α (0) is an initial phase;
M: the maximum quantity of participating in the logic sub of frequency hopping;
μ: the subband shift value of frequency hopping in the frame;
γ (n): the subband shift value of interframe frequency hopping, when n is odd number, γ (n) :=0, γ (0)=0.γ (n) can be a fixed numbers, also can be a random quantity, such as producing a random quantity by the m sequence.γ (n) depends on cell-specific information such as cell ID, scrambler etc. and confirms generally speaking, so that sufficient presence of intercell interference diversity gain to be provided.Here γ (n) both can represent the concrete numeral of fixed intervals, also can represent that random quantity produced formula;
K1: amount of logic, frequency hopping in the frame is turn-offed in 0 expression, and 1 expression starts frequency hopping in the frame;
K2: amount of logic, the interframe frequency hopping is turn-offed in 0 expression, and 1 expression starts the interframe frequency hopping.
If there is not specified otherwise, above parameter is suitable equally in follow-up expression.
Adopt the fixedly method of stepped-frequency interval for frequency hopping in the frame, when reducing by half method, generate frequency hop sequences and may further comprise the steps such as 2 subbands:
Above-mentioned frequency hop sequences production method is not limited to above-mentioned a kind of.
Logic sub resource in the above-described embodiments is mapped to that physical resource and logical resource are one to one in the method for actual physics sub band resources, and is that mirror image or fixed intervals (like 2 subbands by half) are carried out concrete mapping method according to the actual physics frequency-hopping resource.
When physical resource is the mirror image arrangement:
It is as shown in Figure 6: p (n) is a physics sub band resources phase place, and p (n) and α (n) are corresponding one by one, and the first half of α (n) is corresponding with the first half order of p (n), and the latter half of α (n) is corresponding with the latter half backward of p (n).
When physical resource is fixed intervals (like 2 subbands by half) arrangement:
As shown in Figure 7, p (n) is a physics sub band resources phase place, and p (n) and α (n) are corresponding one by one, α
1(n) first half is corresponding with the first half order of p (n), α
1(n) latter half is corresponding with the physical resource order that the first half fixed intervals frequency hopping of p (n) arrives; α
2(n) latter half is corresponding with the latter half order of p (n), α
2(n) first half is corresponding with the physical resource order that the latter half fixed intervals frequency hopping of p (n) arrives.
According to invention scheme of the present invention, because the user is placed in certain concrete subband to transmit,, also there are certain mapping relations so correspond to concrete PRB, the description formula is:
The PRB of CU (Physical Resource Block) at n 0.5ms is:
p(n)·η+β～p(n)·η+β+I-1
Wherein,
η: the PRB sum that is each subband;
β: be user's sub-phase place inside each subband, β 0,1,2 ...., η-1}; And
I: the continuous P RB number that is CU.
Provide several concrete embodiment according to the present invention below:
Concrete parameter configuration in the scheme under the example 1:20MHz total bandwidth
| |
8 is 8 |
| η | |
| 6 is that each subband is 6 RB | |
| μ | During mirror image :=4 fixed intervals frequency hopping=2 of reducing by half: |
| α(0) | 0～7 can dispose |
| γ(n)： | Can be configured to 0～7 for stator interframe stepped-frequency interval |
Concrete parameter configuration in the scheme under the example 2:1.25MHz total bandwidth
| |
6 is 6 subbands, and all resources are used for |
| η | |
| 1 is that each subband is 1 RB | |
| μ | Fixed intervals frequency hopping=3 of reducing by half: |
| α(0) | 0～5 can dispose |
| γ(n)： | Can be configured to 0～5 for stator interframe stepped-frequency interval |
Example 3:, but will turn off frequency hopping between subframe if user's frequency hopping needs Resource Block greater than a subband then the way that can adopt is the frequency hoppings of two continuous subbands or a plurality of subbands
| |
1 |
| |
0 |
| The Resource Block that user's configures physical is continuous | Like 20MHz:{0,1,2} 1.25MHz{0,1} |
| Other explanation | Similar for example 1,2 |
In the above-described embodiments,, must a pair of resource turn off, otherwise can cause collision in the sub-district if turn off Intra TTI.Can certainly turn off whole sub-district.Do not need the environment of Inter TTI roughly can consider similar isolated sub-district.
2 subbands of in the embodiment of the invention, mentioning reduce by half frequency hopping, the mirror image frequency-hopping mode (frequency hopping mode), also can adopt the method for the invention for other 3 subbands, 4 subbands or more subband hopping patterns.
Adopt the method for the invention; Unified the frequency hop sequences production method; And stipulated that the frequency hopping logical resource is to the physical resource mapping method; Come whole the description to comprise interframe frequency-hopping mode, the interior frequency-hopping mode of frame, can avoid frequency-hopping mode complicated, and can utilize resource dynamically at interior frequency-hopping mode.The present invention goes for the single carrier-frequency division multiple access system of bandwidth varyings such as 1.25M, 5M, 2.5M, 10M, 15M, 20M, for example DFT-S OFDM or IFDMA system.The present invention supports the high-speed mobile characteristic, goes for the application scenarios of 3km/h, 30km/h, 120km/h or higher rate travel.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a frequency hopping sequence generating method is characterized in that, may further comprise the steps:
Step S102 is divided into a plurality of logic sub with channel width, and obtains the initial phase of the logic sub of appointment;
Step S104 confirms the phase place at the first frequency hopping time point place according to the subband shift value of frequency hopping in said initial phase and the predetermined frame; And
Step S106; According to the subband shift value of the phase place at the said first frequency hopping time point place, interframe frequency hopping with represent that respectively frequency hopping ON/OFF and the open/close amount of logic of interframe frequency hopping in the frame confirm the phase place at each frequency hopping time point place subsequently, to generate frequency hop sequences.
2. method according to claim 1 is characterized in that, adopts in the frame a kind of in the frequency hopping and interframe frequency hopping at least.
3. method according to claim 2 is characterized in that, frequency hopping adopts mirror image frequency hopping or fixed intervals frequency hopping in the said frame, and said interframe frequency hopping adopts said fixed intervals frequency hopping or random frequency hopping.
4. method according to claim 3 is characterized in that, when adopting said mirror image frequency hopping, confirms the phase place at the said first frequency hopping time point place according to following formula:
α (1)=(α (0)+μ k1) mod M, wherein, α (0) is an initial phase, and μ is the subband shift value of frequency hopping in the said frame, and M is the quantity of said a plurality of logic sub, and k1 is
Represent the open/close switching value of frequency hopping in the said frame, and when k1 was 0, frequency hopping was closed in the expression frame, when k1 was 1, frequency hopping was opened in the expression frame.
5. method according to claim 4 is characterized in that, when adopting said mirror image frequency hopping, is when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirms the phase place at said each frequency hopping time point place according to following formula:
α (n)=(α (n-2)+γ (n) k2) mod M; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at said each frequency hopping time point place: α (n)=(α (n-1)+k1) mod M according to following formula; Wherein, the phase place at said each frequency hopping time point place of said α (n) expression, the subband shift value of the said interframe frequency hopping of said γ (n) expression; Said k2 is the open/close switching value of expression interframe frequency hopping; And when k2 was 0, expression interframe frequency hopping was closed, and represented that when k2 is 1 the interframe frequency hopping opens.
6. method according to claim 3 is characterized in that, when adopting said fixed intervals frequency hopping, confirms the phase place at the said first frequency hopping time point place according to following formula:
α (1)=(α (0)+μ) mod M/2, wherein, α (0)≤M/2-1; Or
α (1)=(α (0)-M/2+ μ) mod M/2+M/2, wherein, α (0)＞M/2-1,
Wherein, α (0) is an initial phase, and μ is the subband shift value of frequency hopping in the said frame, and M is the quantity of said a plurality of logic sub.
7. method according to claim 6 is characterized in that, when adopting said fixed intervals frequency hopping, is when being not less than 2 even number at the quantity n of determined frequency hopping time point, confirms the phase place at said each frequency hopping time point place according to following formula:
α (n)=(α (n-2)+γ (n) k2) mod M; And be when being not less than 3 odd number at the quantity n of determined frequency hopping time point, confirm the phase place at said each frequency hopping time point place: α (n)=(α (n-1)+μ k1) mod M/2 according to following formula, wherein,
α (n-1)≤M/2-1; And α (n)=(α (n-1)-M/2+ μ k1) mod M/2+M/2, wherein, α (n-1)＞M/2-1,
Wherein, the phase place at said each frequency hopping time point place of said α (n) expression, the subband shift value of the said interframe frequency hopping of said γ (n) expression; K1 is the open/close switching value of frequency hopping in the said frame of expression, and representes that when k1 is 0 frequency hopping is closed in the frame, when k1 is 1, representes that frequency hopping is opened in the frame; K2 is the open/close switching value of the said interframe frequency hopping of expression; And when k2 was 0, expression interframe frequency hopping was closed, and represented that when k2 is 1 the interframe frequency hopping opens.
8. according to each described method in the claim 5 and 7, it is characterized in that, when n is zero and odd number, said γ (n)=0, and said γ (n) is fixed numbers or random quantity.
9. a frequency hopping resource allocation method that adopts each described frequency hopping sequence generating method in the claim 1 to 6 is characterized in that, may further comprise the steps:
Step S502 makes the phase place at each frequency hopping time point place in the said frequency hop sequences corresponding one by one with each physics sub band resources;
Step S504 is corresponding one by one with the phase place of said each physics sub band resources with Physical Resource Block; And
Step S506 distributes to corresponding Physical Resource Block the user who has carried out frequency hopping according to the phase place at the phase place corresponding relation of Physical Resource Block and said each physics sub band resources and each frequency hopping time point place in the said frequency hop sequences and the corresponding relation of each physics sub band resources.
10. method according to claim 9 is characterized in that, confirms the one-to-one relationship of the phase place of said band width in physical Resource Block and said each physics sub band resources: p (n) η+β～p (n) η+β+I-1 according to following formula; Wherein, p (n) is a physics sub band resources phase place, and η representes the sum of the Physical Resource Block of each said logic sub; β representes the sub-phase place of said user in each said logic sub, and β ∈ { 0,1; 2 ..., η-1}; I representes the continuous physical resource number of blocks of said CU, and n representes the quantity of determined frequency hopping time point.
11. method according to claim 10; It is characterized in that; When mirror image is arranged said band width in physical resource; The corresponding relation of the phase place at said each physics sub band resources phase place and said each frequency hopping time point place is: the phase sequence at said each frequency hopping time point place of first half is corresponding to said each physics sub band resources phase place of latter half, and the phase place backward at said each frequency hopping time point place of latter half is corresponding to said each physics sub band resources phase place of first half.
12. method according to claim 10 is characterized in that, when arranging said band width in physical resource with fixed intervals, the corresponding relation of the phase place at said each physics sub band resources phase place and said each frequency hopping time point place is: α
1(n) first half is corresponding with said each physics sub band resources phase sequence of first half, α
1(n) latter half is corresponding with the physical resource order that the fixed intervals frequency hopping arrives with said each physics sub band resources phase place of first half; α
2(n) latter half is corresponding with said each physics sub band resources phase sequence of latter half, α
2(n) first half is corresponding with the physical resource order that the fixed intervals frequency hopping arrives with said each physics sub band resources phase place of latter half, wherein, and α
1(n) phase place at said each frequency hopping time point place of expression first half, and α
2(n) phase place at said each frequency hopping time point place of expression latter half.
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| WO2015109501A1 (en) * | 2014-01-23 | 2015-07-30 | 华为技术有限公司 | Information transmitting and receiving method and corresponding device |
| TWI508469B (en) * | 2014-08-15 | 2015-11-11 | Senao Networks Inc | Method and module for generating frequency hopping sequence for communication frequency hopping |
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| JP6616905B2 (en) * | 2016-01-29 | 2019-12-04 | テレフオンアクチーボラゲット エルエム エリクソン（パブル） | Frequency hopping for random access |
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| CN111713028B (en) * | 2018-02-08 | 2021-09-07 | 华为技术有限公司 | Frequency hopping method and device |
| CN111771338B (en) * | 2018-02-16 | 2022-08-26 | 瑞典爱立信有限公司 | Method and apparatus for physical uplink shared channel frequency hopping allocation |
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