CN101197653A - Radio communication apparatus and radio communication method - Google Patents
Radio communication apparatus and radio communication method Download PDFInfo
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- CN101197653A CN101197653A CN 200710197107 CN200710197107A CN101197653A CN 101197653 A CN101197653 A CN 101197653A CN 200710197107 CN200710197107 CN 200710197107 CN 200710197107 A CN200710197107 A CN 200710197107A CN 101197653 A CN101197653 A CN 101197653A
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Abstract
The present invention is to provide a communication channel with a low inter-cell interference while suppressing variation in the amount of inter-cell interference. Provided is a base station arranged in a radio communication system configured to implement a frequency division multiple access method by using a frequency division multiplexing method as a modulation method, and configured of cells each divided into an inner region and an outer region. The base station includes an allocation controller configured to perform subchannelization using a perfectly-orthogonal channel in the outer region of the cell, and to perform subchannelization using a quasi-orthogonal channel in the inner region of the cell.
Description
Technical field
The present invention relates to a kind of radio communication device and wireless communications method.
Background technology
At present, the known wireless communication system that uses FDMA frequency division multi-access modes such as (Frequency Division Multiple Access).Especially, used in recent years the wireless communication system of OFDMA OFDM modes such as (Orthogonal FrequencyDivision Multiple Access) noticeable.
In the wireless communication system that has used such OFDM mode, when having 3 adjacent sub-districts, the known structure (with reference to Figure 18) of for example in each sub-district 1 to 3, using same frequency band (fMHz) and with a certain frequency band (fMHz) logically be divided into 3 sections and will cut apart after each frequency band (f/3MHz) distribute to the structure (with reference to Figure 19) of each sub-district 1 to 3.
In the former structure (with reference to Figure 18), there are the following problems: because a certain frequency band integral body is used in a plurality of sub-district 1 to 3, therefore hour can realize high-throughput from the interference of other sub-districts, but because neighbor cell also uses same frequency band, therefore presence of intercell interference becomes big, can't provide enough communication qualities (transmission rate or the percent of call lost etc.) to the portable terminal (user) that is positioned at the end, sub-district.
On the other hand, in the latter's structure (with reference to Figure 19), there are the following problems: owing to use different frequency bands between neighbor cell, therefore suppress presence of intercell interference easily, but owing to be 3 sections with a certain band segmentation, therefore accessible peak throughput on be limited to 1/3 when using this frequency band whole, when the minizone traffic is inhomogeneous, can not make full use of Radio Resource.
Therefore, following structure (with reference to patent documentation 1) has been proposed: as shown in figure 20, with each cell division is exterior lateral area and medial region, to be distributed in the common frequency band F4 that uses in a plurality of sub-districts from the little medial region of the interference of other sub-districts, to distributing the frequency band F1 to F3 that uses in each sub-district respectively from the big exterior lateral area of the interference of other sub-districts.
[patent documentation 1] spy opens the 2005-80286 communique
Summary of the invention
In above-mentioned prior art, owing to be object with the voice communication, so the time fluctuation of presence of intercell interference is milder.
Yet, in data communication, there is following feature: the properties of the traffic, the especially intermittent grouping that sends than weak point on man-to-man link, the change quantitative change of the interference around therefore giving is big.
On the other hand, there are the following problems: although have the feature that can carry out retransmission process in data communication, but owing to decide transmitted power or MCS (Modulation coding sets) according to the interference volume before the data delivery time, so the big situation of the variation of interference volume is unsatisfactory.
And, when supposition utilizes the OFDMA mode, in the identical frequency band of same wireless communication system, can be implemented in " orthogonal channel (aftermentioned) fully " and " accurate orthogonal channel (the aftermentioned) " both sides that can't realize in the FDMA mode.
Therefore, the present invention is the invention that proposes in view of above-mentioned problem, its purpose is to provide a kind of radio communication device and wireless communications method, and this radio communication device and wireless communications method can provide the little communication of presence of intercell interference and can suppress the variation of presence of intercell interference.
First feature of the present invention is, a kind of radio communication device, it is configured in the wireless communication system, this wireless communication system is realized FDMA with the frequency division multiplexing mode as modulation system, and be medial region and exterior lateral area with cell division, wherein, has the distribution control part, this distribution control part distributes complete orthogonal channel to be used as at the spendable subchannel of described exterior lateral area, divide the registration orthogonal channel to be used as at the spendable subchannel of described medial region, as whole quadratures between the subcarrier that comprises in the described complete orthogonal channel that distributes at the spendable subchannel of the exterior lateral area of neighbor cell, between the subcarrier that comprises in the described accurate orthogonal channel that distributes at the spendable subchannel of the medial region of neighbor cell, a part repeats, part quadrature.
In first feature of the present invention, described distribution control part is distributed in the spendable subchannel of described exterior lateral area to the expectation ripple received power portable terminal lower than predefined defined threshold, and the expectation ripple received power portable terminal higher than this defined threshold is distributed in the spendable subchannel of described medial region.
In first feature of the present invention, described medial region is divided into a plurality of zones, and described distribution control part distributes the different respectively accurate orthogonal channel of utilization rate to be used as the spendable subchannel of described a plurality of medial region that gets cutting apart.
In first feature of the present invention, described distribution control part is to the portable terminal of the exterior lateral area that is positioned at each sub-district, with the burst allocation pattern of stipulating by the combination of at least one complete orthogonal channel in the data frame structure and at least one symbol, distributing radio resource, described burst allocation pattern is identical in all minizones.
In first feature of the present invention, described distribution control part distributes to switch call at the spendable subchannel of described exterior lateral area.
In first feature of the present invention, described medial region is divided into a plurality of zones, described distribution control part with switch call distribute to cutting apart these a plurality of medial region in a zone in spendable subchannel.
In first feature of the present invention, described distribution control part is distributed to switch call in data frame structure and the regional near zone that is assigned lead code.
In first feature of the present invention, described distribution control part is according to by the communication quality in the down link of portable terminal notice, and this portable terminal is distributed in spendable subchannel in some zones in described medial region or the described exterior lateral area.
In first feature of the present invention, described distribution control part is to the portable terminal of the exterior lateral area that is positioned at each sub-district, with the burst allocation pattern by the combination regulation of at least one complete orthogonal channel in the data frame structure and at least one symbol, distributing radio resource; Described distribution control part is according to electric wave situation change burst allocation pattern.
In first feature of the present invention, described distribution control part is reported signal allocation with at least one and is given at the spendable subchannel of described exterior lateral area.
In first feature of the present invention, described distribution control part will be distributed to exclusively in the part of the spendable subchannel of described exterior lateral area and report signal transmission usefulness.
Second feature of the present invention is, a kind of wireless communications method, this method is used for wireless communication system, this wireless communication system is realized FDMA with the frequency division multiplexing mode as modulation system, and be medial region and exterior lateral area with cell division, wherein, have following steps: radio communication device distributes complete orthogonal channel to be used as at the spendable subchannel of described exterior lateral area, divide the registration orthogonal channel to be used as at the spendable subchannel of described medial region, as whole quadratures between the subcarrier that comprises in the described complete orthogonal channel that distributes at the spendable subchannel of the exterior lateral area of neighbor cell, between the subcarrier that comprises in the described accurate orthogonal channel that distributes at the spendable subchannel of the medial region of neighbor cell, a part repeats, part quadrature.
Description of drawings
Fig. 1 is the functional block diagram of the base station of first to the 9th execution mode.
Fig. 2 is the key diagram of the notion of the subcarrier that uses in the wireless communication system of first to the 9th execution mode and subchannel.
Fig. 3 is the key diagram of the notion of the orthogonal channel that uses in the wireless communication system of first to the 9th execution mode and accurate orthogonal channel.
Fig. 4 is the key diagram of an example of the data frame structure that uses in the wireless communication system of first execution mode.
Fig. 5 is the key diagram of the distribution method of the subchannel in the wireless communication system of second execution mode.
Fig. 6 is the key diagram of an example of the data frame structure that uses in the wireless communication system of the 3rd execution mode.
Fig. 7 is the figure of an example of the cell structure in the wireless communication system of expression the 3rd execution mode.
Fig. 8 is the figure (its 1) that is illustrated in an example of the burst allocation pattern of using in the wireless communication system of the 3rd execution mode.
Fig. 9 is the figure (its 2) that is illustrated in an example of the burst allocation pattern of using in the wireless communication system of the 3rd execution mode.
The key diagram of the action of the portable terminal when Figure 10 is switching in the wireless communication system of the 4th execution mode.
Figure 11 is the figure (its 1) that is illustrated in an example of the burst allocation pattern of using in the wireless communication system of the 5th execution mode.
Figure 12 is the figure (its 2) that is illustrated in an example of the burst allocation pattern of using in the wireless communication system of the 5th execution mode.
Figure 13 is the figure (its 3) that is illustrated in an example of the burst allocation pattern of using in the wireless communication system of the 5th execution mode.
Figure 14 is the overall structure figure of the wireless communication system of the 7th and the 8th execution mode.
Figure 15 is the key diagram of an example of the data frame structure that uses in the wireless communication system of the 7th execution mode.
Figure 16 is the key diagram of an example of the data frame structure that uses in the wireless communication system of the 8th execution mode.
Figure 17 is the key diagram of an example of the data frame structure that uses in the wireless communication system of the 9th execution mode.
Figure 18 is the key diagram (its 1) of existing band allocating method.
Figure 19 is the key diagram (its 2) of existing band allocating method.
Figure 20 is the key diagram (its 3) of existing band allocating method.Symbol description
11: sign map portion; 12: dispenser; 13:IFFT; 14: parallel/serial converter section; 15: the guard interval insertion section; The 16:DAC/RF circuit; 17: antenna; 21: antenna; The 22:ADC/RF circuit; 23: guard interval is removed portion; 24: parallel/serial converter section; 25:FFT; 26: signal extraction portion; 27: symbol de-maps portion; 30: distribute control part.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.In the record of the following drawings, to the identical or similar symbol of identical or similar part mark.But, it should be noted that accompanying drawing is schematic figure.
(wireless communication system of first execution mode of the present invention)
The wireless communication system of first execution mode of the present invention is the multi-user comm that OFDM (OFDM) mode is used as modulation system.
In the wireless communication system of present embodiment, the part of a plurality of subcarriers by will being included in a communication path is distributed to a travelling carriage (user), realizes OFDM (OFDMA) mode.
In addition, in the wireless communication system of present embodiment, as shown in figure 20, a sub-district is divided into medial region and exterior lateral area.
Here, in medial region, use the identical frequency band (in the example of Figure 20, being F4) of frequency band that uses with the medial region of neighbor cell, use the unduplicated frequency band of frequency band that uses with the exterior lateral area of neighbor cell (in the example at Figure 20 in exterior lateral area, 1 exterior lateral area is used F1 in the sub-district, 2 exterior lateral area is used F2 in the sub-district, and 3 exterior lateral area is used F3 in the sub-district).
In addition, in the wireless communication system of present embodiment, base station (radio communication device) is distributed in the exterior lateral area or the spendable subchannel of medial region of this base station subordinate's sub-district to a plurality of portable terminals.
In the present embodiment, in order to make easy understanding, the example of subchannel when the frequency direction quadrature described, but the present invention is not limited to this example, also goes for subchannel when the time orientation quadrature or subchannel example during quadrature in the combination of time orientation and frequency direction.
As shown in Figure 1, the base station in the wireless communication system of present embodiment has: sign map portion (symbol mapping) 11, dispenser 12, IFFT13, parallel/serial converter section 14, protection (guard) interval insertion section 15, DAC/RF circuit 16, antenna 17,21, ADC/RF circuit 22, guard interval are removed portion 23, parallel/serial converter section 24, FFT25, signal extraction portion 26, symbol de-maps portion (symboldemapping) 27 and are distributed control part 30.
Sign map portion 11 is according to the modulation system of using, and the transmission burst (bit sequence) of input is mapped to the symbol line output of going forward side by side.
Dispenser 12 is according to the indication from distribution control part 13, with being mapped to transmission letter sequence allocation from the symbol of sign map portion 11 input, export then to (arranging) subcarrier that is included in " orthogonal channel fully " or " the accurate orthogonal channel " at frequency axis.
IFFT13 output is as described above by carrying out the time signal (digital signal) that inverse Fourier transform obtains to a plurality of subcarriers from dispenser 12 inputs.
Time signal (digital signal) behind 14 pairs of inverse Fourier transforms of parallel/serial converter section is carried out parallel/serial conversion.
The 15 pairs of time signals (digital signal) from parallel/serial converter section 14 inputs in guard interval insertion section are inserted protection (guard interval) at interval.
After ADC/RF circuit 16 will protect the time signal (digital signal) after inserting at interval to convert analog signal to, will carry out the simulation process of amplifying necessity such as frequency conversion and the ofdm signal (analog signal) that obtains sends by antenna 17.
On the other hand, when antenna 21 received ofdm signal (analog signal), 22 pairs of ofdm signals that receive of ADC/RF circuit (analog signal) converted digital signal to after carrying out the simulation process of amplifying necessity such as frequency conversion.
Guard interval is removed portion 23 from removing protection at interval by the digital signal of ADC/RF circuit 22 inputs.
Digital signal after 24 pairs of protections of parallel/serial converter section are removed is at interval carried out parallel/serial conversion.
FFT25 takes out each subcarrier thus to carrying out Fourier transform from the digital signal of parallel/serial converter section 24 inputs.
Signal extraction portion 26 extracts symbol according to from the indication that distributes control part 30 from each subcarrier by the FFT25 input.
27 pairs of symbols that extracted by signal extraction portion 26 of symbol de-maps portion are separated mapping, obtain the received signal sequence thus.
Distribution control part 30 distributes " orthogonal channel fully " as at the spendable subchannel of the exterior lateral area of sub-district, distributes " accurate orthogonal channel " conduct at the spendable subchannel of the medial region of sub-district.
That is, distribute that control part 30 is arranged in the exterior lateral area of sub-district or medial region by the portable terminal that becomes communication object which side control the method for sub-channelizing.
Particularly, distribute control part 30, the exterior lateral area in the sub-district is carried out sub-channelizing by complete orthogonal channel, and the medial region in the sub-district is carried out the sub-channelizing based on accurate orthogonal channel.
Here, as distribute equal quadrature between the subcarrier that comprises in " orthogonal channel fully " at the spendable subchannel of the exterior lateral area of neighbor cell.
In addition, between the subcarrier that comprises in " the accurate orthogonal channel " that distribute at the spendable subchannel of the medial region of neighbor cell, a part repeats, a part of quadrature.
Below, lift concrete example " orthogonal channel fully " and " accurate orthogonal channel " are described.In the present embodiment, as the wireless communication system that adopts the OFDMA mode, be that example describes with wireless communication system based on IEEE802.16.But the present invention is not limited to this wireless communication system, also goes for adopting the General System of OFDMA mode.
Usually, in the wireless communication system that adopts the OFDMA mode, because a frequency band is made of very many subcarriers (frequency), therefore " make which travelling carriage (user) use (distributions) " when simplification of considering to control and the control signal amount at each subcarrier control, efficient is not high.
Therefore, in this wireless communication system, a plurality of subcarriers (frequency) combination being divided into groups, is that unit carries out the distribution to portable terminal (user's) Radio Resource (subcarrier) with this group.
As shown in Figure 2, in IEEE802.16, will as above make up a plurality of subcarriers (frequency) and group be called " subchannel ".
And the integrated mode of this subchannel is decided by the parameter that is called " IDcell ".
In the example of Fig. 2, when " IDcell=1 ", subchannel 1 is made of subcarrier 1,2,3, and subchannel 2 is made of subcarrier 4,5,6, and subchannel 3 is made of subcarrier 7,8,9.
In addition, when " IDcell=2 ", subchannel 1 is made of subcarrier 1,4,7, and subchannel 2 is made of subcarrier 2,5,8, and subchannel 3 is made of subcarrier 3,6,9.
Here, under the identical situation of " IDcell " in neighbor cell A and B, when the portable terminal B both sides to sub-district A subordinate's portable terminal A and sub-district B subordinate distributed identical subchannel, all subcarriers (frequency) that portable terminal A and portable terminal B are distributed were all identical.
On the other hand, under the identical situation of " IDcell " in neighbor cell A and B, when the portable terminal B both sides to sub-district A subordinate's portable terminal A and sub-district B subordinate distribute different subchannels, all different to all subcarriers (frequency) that portable terminal A and portable terminal B distribute.
For example, shown in Fig. 3 (a), when " IDcell " in neighbor cell A and B is identical, owing to constitute all subcarriers (frequency) and the complete quadrature of all subcarriers (frequency) of the subchannel sc2 that constitutes the portable terminal B that distributes to sub-district B subordinate of the subchannel sc1 of the portable terminal A that distributes to sub-district A subordinate, therefore between this sub-district A and B, all show as by " orthogonal channel fully " and carry out sub-channelizing.
That is, in this case, quadrature all between the subcarrier that comprises among complete orthogonal channel sc1, the sc2 that distributes as spendable subchannel in the exterior lateral area of adjacent sub-district A, B.And then subchannel sc1 has different subchannel number (that is, SC1, SC2) with subchannel sc2.As above-mentioned situation the time, show as subchannel SC1 with respect to subchannel SC2 quadrature.
On the other hand, shown in Fig. 3 (b), at neighbor cell A and B " IDcell " not simultaneously, even subchannel sc1 that sub-district A subordinate's portable terminal A is distributed and subchannel sc2 that sub-district B subordinate's portable terminal B is distributed are not simultaneously, a part of distributing to the subcarrier of portable terminal A and portable terminal B also can repeat.
For example, at neighbor cell A and B " IDcell " not simultaneously, between the subcarrier (frequency) that comprises among subcarrier (frequency) that in the subchannel sc1 that sub-district A uses, comprises and the subchannel sc2 that in the B of sub-district, uses, part orthogonality relation is set up and the establishment of a part of replicated relation, therefore both is called " accurate quadrature ".
That is, between the subcarrier that comprises among accurate orthogonal channel sc1, the sc2 that distributes as spendable subchannel in the medial region of neighbor cell A, B, a part repeats, a part of quadrature.As above-mentioned situation the time, show as subchannel sc1 with respect to the accurate quadrature of subchannel sc2
In addition, distribute control part 30 in the exterior lateral area of sub-district, to distribute as the dedicated channel in each sub-district by spendable each subchannel (orthogonal channel fully) as shown in Figure 4.
As shown in Figure 4, for example distribute control part 30 can construct data frame structure as follows: the information of preserving the portable terminal that is positioned at the sub-district exterior lateral area, the information of preserving the portable terminal that is positioned at the sub-district medial region in next zone in the zone of having distributed lead code (preamble).
And, distribute control part 30, can distribute " IDcell " different with neighbor cell pairing subchannel as at the spendable subchannel of the medial region of sub-district, can be distributed in " IDcell " pairing subchannel identical with neighbor cell, distribute to from the subchannel of sub-district as at the spendable subchannel of the exterior lateral area of sub-district.
Here, distribute control part 30 to change the subchannel that distributes as at the exterior lateral area of sub-district or the spendable subchannel of medial region, for example, can be distributed in the spendable subchannel of exterior lateral area to the expectation ripple received power portable terminal lower, the expectation ripple received power portable terminal higher than this defined threshold is distributed in the spendable subchannel of medial region than predefined defined threshold.
According to the base station of first execution mode, carry out sub-channelizing in the exterior lateral area of sub-district by complete orthogonal channel, carry out sub-channelizing in the medial region of sub-district based on accurate orthogonal channel.
Like this, by dual structure is made in each sub-district, the exterior lateral area in the sub-district can provide presence of intercell interference little communication, and the medial region in the sub-district can constitute the situation of the suitable MCS of selection.
Exterior lateral area in the sub-district can provide the little communication of presence of intercell interference to be because utilized complete orthogonal channel and these subchannels are set suitable utilization distance again.
On the other hand, the medial region in the sub-district can constitute the reasons are as follows of situation of the suitable MSC of selection.
In the past, transmitted power or MCS were decided based on the interference volume before the delivery time in the base station, so the big situation of the change of interference volume is unsatisfactory.
When the portable terminal to the medial region that is positioned at the sub-district distributes complete orthogonal channel, according to whether using same sub-channel at neighbor cell, further according to the position (especially up link) of using this subchannel, the change of envisioning the disturbed amount in this portable terminal is big.
On the other hand, when the portable terminal to the medial region that is positioned at the sub-district divides the registration orthogonal channel, become the subchannel that from neighbor cell, uses and be subjected to less interference at every turn, so the whole variation of the disturbed amount in this portable terminal diminishes, MCS is moved expeditiously.
And, under situation non-orthogonal between the subchannel that neighbor cell uses, to compare with the situation of quadrature between the subchannel that uses at neighbor cell, the disturbed quantitative change in each portable terminal is big.
Therefore, base station according to present embodiment, mutually orthogonal between the subchannel that uses on the border between neighbor cell by making (distributing complete orthogonal channel) as the spendable subchannel in border between neighbor cell, can guarantee the subchannel that interference volume is very little, to also providing excellent communications with the little portable terminal of the portable terminal of the distance of base station or indoor etc. received power.
In addition, base station according to present embodiment, for expecting that the ripple received power portable terminal lower than predefined defined threshold is distributed in the spendable subchannel of exterior lateral area of sub-district, the expectation ripple received power portable terminal higher than this defined threshold is distributed in the spendable subchannel of medial region of sub-district.
By carrying out the distribution of such subchannel, can obtain following effect.
Whole zone in whole sub-district, compare with the situation of using complete orthogonal channel to communicate, therefore the beginning of the use of the particular sub-channel in the neighbor cell or to finish the influence that the change of the presence of intercell interference amount that the portable terminal to the medial region that is positioned at the sub-district is subjected to produces little can expect the variation of interference volume easily.
In data communication, carry out the control of transmitted power or the selection of MCS according to the estimator of presence of intercell interference amount, therefore can estimate the presence of intercell interference amount more accurately, can imagine that thus these controls work more efficiently and can access the higher system throughput.
On the other hand; whole zone in whole sub-district; compare with the situation of using accurate orthogonal channel to communicate; use in the exterior lateral area of sub-district under the situation of complete orthogonal channel; can provide presence of intercell interference little communication, especially can reduce outage rate (outage rate) the portable terminal that is positioned at the end, sub-district.
In addition, base station according to present embodiment, not simply also with complete orthogonal channel and accurate orthogonal channel, but be called as the notion of " again with cutting apart (reuse partitioning) " according to these, the substantial distance of utilizing again of shortening spendable subchannel in the sub-district can realize the higher system throughput thus.
(second execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first execution mode.
In second execution mode of the present invention, as shown in Figure 5, the medial region of sub-district is divided into a plurality of zones, distributes control part 30 to distribute the different accurate orthogonal channel of utilization rate to be used as the spendable subchannel of cutting apart of a plurality of medial region.
At this moment, distribute control part 30 will utilize the zone of the high accurate orthogonal channel of utilization rate as the inboard that utilizes the zone of the low accurate orthogonal channel of utilization rate.
In the example of Fig. 5, to distribute control part 30 to distribute utilization rates be 60% accurate orthogonal channel as at the spendable subchannel of medial region B, and to distribute utilization rate be 90% accurate orthogonal channel as at the spendable subchannel of medial region A.
For example, distribute control part 30 to distribute the high accurate orthogonal channel of utilization rate to the higher portable terminal of received power.
By formation like this, utilize the high accurate orthogonal channel of utilization rate expeditiously in each sub-district, can reach high throughput of system.
In addition, distribution control part 30 can change the utilization rate at each spendable accurate orthogonal channel in zone adaptively.
For example, distribute 30 pairs of utilization rates of control part at each spendable accurate orthogonal channel in zone, can decide according to obstruction (blocking) rate of the peripheral cell that utilizes identical frequency band, also can determine so that regional throughput maximum according to the set point of peripheral cell and the observation information of mensuration.
In addition, distribute control part 30 also can set and utilize the different a plurality of complete orthogonal channel of distance again.
(the 3rd execution mode)
Below, to the wireless communication system of present embodiment, with above-mentioned first and the difference of the wireless communication system of second execution mode serve as main describing.
As mentioned above, in first and second execution mode, distribute control part 30 to be distributed in the spendable subchannel of exterior lateral area of each sub-district regularly.
In this case, can use by simple control, but it is many at few, the untapped subchannel of a certain cell communication amount, and under the situation many in the neighbor cell traffic, that subchannel is not enough, although can use these untapped subchannels can reach higher throughput of system by making other sub-districts, but by the restriction Radio Resource is more than necessity, may exist in the high sub-district of the traffic and a plurality of portable terminals that can't realize sufficient transmission speed occur.
On the other hand, when the use that allows these subchannels in other sub-districts, under the situation that the portable terminal that is positioned at the end, sub-district is wanted to communicate, owing to, might can't use this subchannel from the interference of other sub-districts.
Therefore, in the scope of the outage rate that does not influence the portable terminal that is positioned at the end, sub-district, preferably make a plurality of minizones share accurate dedicated channel.
Therefore, in the 3rd execution mode, distribute control part 30 when distributing complete orthogonal channel to be used as, as shown in Figure 6, be categorized into dedicated channel and accurate dedicated channel is distributed at the spendable subchannel in each sub-district.
Here, dedicated channel is the subchannel in each sub-district specific assigned, and accurate dedicated channel is the subchannel of sharing in a plurality of sub-districts under certain condition.
Particularly, each cell allocation control part 30 as principle according to " as the accurate dedicated channel of distributing " at the spendable subchannel in other sub-districts (fully orthogonal channel), " as from the sub-district spendable subchannel (orthogonal channel fully) and the accurate dedicated channel of distributing ", " as from the sub-district spendable subchannel (orthogonal channel fully) and the dedicated channel of distributing " priority, portable terminal is carried out the distribution of subchannel.
Then, distribute control part 30, under the situation of portable terminal having been distributed all " as in the dedicated channel of distributing " from sub-district spendable subchannel (orthogonal channel fully), forbid other sub-districts use " as from the sub-district spendable subchannel (orthogonal channel fully) and the accurate dedicated channel of distributing ".
As a result, cause the decline of the blocking rate in each sub-district.
Fig. 7 represents, distributes the example of " dedicated channel " and " accurate dedicated channel " at each cell allocation control part 30.In the example of Fig. 7, distribute control part 30 to distribute different " dedicated channels " and " accurate dedicated channel " to be used as at the spendable subchannel of neighbor cell (orthogonal channel fully).
In addition, distribute control part 30 to carry out the usage license of accurate dedicated channel and forbid by cable network.
And, distribute the control part 30 also can be from distributing in order as the accurate dedicated channel of distributing at the low spendable subchannel in sub-district of traffic load of orthogonal channel fully.
Distribute control part 30 also can grasp this traffic load here, by cable network.
And, distributing control part 30, also can improve at the allocation threshold of " the accurate dedicated channel " of other sub-districts application method as " accurate dedicated channel " and " dedicated channel ".
, distribute control part 30 here, the benchmark as distributing " accurate dedicated channel " also can use the ratio of received power with respect to the interference level of accurate dedicated channel integral body.
Perhaps, distribute control part 30 also can determine the allocation threshold of the accurate dedicated channel in the sub-district 1 according to the interference level in the dedicated channel in the sub-district 1.
And, distribute control part 30 also can monitor situation to each Frame, when taking place to surpass the situation of this allocation threshold, do not distribute " accurate dedicated channel " (in case not being to have distributed " accurate dedicated channel " just always to continue to use).
The result, in the sub-district, when traffic load is low, distribute control part 30 with as distributing " accurate dedicated channel " in the mode of the high spendable subchannel in sub-district of traffic load, when the traffic load in each sub-district rises, the presence of intercell interference electrical level rising becomes the situation that is difficult to use " accurate dedicated channel " in each sub-district, should " accurate dedicated channel " be as the channel that distributes at the spendable subchannel in other sub-districts.
In addition, in the down link of in IEEE802.16, stipulating, as shown in Figure 8, distribute control part 30 for the portable terminal that is positioned at each sub-district, with burst (burst) allocation model (pattern) distributing radio resource, this burst allocation pattern is to be stipulated by the combination of at least one subchannel in data frame structure (subchannel number) and at least one symbol (OFDM symbolic number, be equivalent to distribution time of subchannel).
Such wireless resource allocation unit to portable terminal is called " burst ".When spendable subchannel distributed " accurate dedicated channel " in as each sub-district, this burst allocation pattern was all identical in all minizones.
This be because as Fig. 9 (a) all minizones that are shown in when the burst allocation pattern is not unified, be unit realization orthogonalization with the subchannel, see with burst unit can not guarantee between the spendable subchannel of neighbor cell, can realize orthogonalization.
On the other hand as Fig. 9 (b) all minizones that are shown in when the burst allocation pattern is unified, see quadrature between the spendable subchannel of neighbor cell with burst unit.
(the 4th execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first to the 3rd execution mode.
In above-mentioned first to the 3rd execution mode, distribute control part 30 according to the received power in the portable terminal etc., be distributed in spendable subchannel in some zones of the medial region of sub-district or exterior lateral area.
From conceptive, this means the subchannel that distributes control part 30 to distribute according to the determining positions of the portable terminal in the sub-district.
But the position of receiving and dispatching the portable terminal (portable terminal of high-speed mobile) of switch call is to change constantly.
Therefore, can expect that the portable terminal of high-speed mobile is from the interference volume of experiencing and big to the influence change of throughput of system to the interference volume that produces owing to the moving of portable terminal of high-speed mobile on every side.
Therefore, in the present embodiment, distribution control part 30 not only utilizes the received power in the portable terminal, also utilizes the information of the translational speed of relevant portable terminal, is distributed in certain regional spendable subchannel of the medial region or the exterior lateral area of sub-district.
Below, expression is at the channel allocation method of switch call.Here, in switch call,, also comprise calling by the portable terminal transmitting-receiving of high-speed mobile except comprising calling by the circumscribed portable terminal transmitting-receiving that brings from the sub-district.
In addition, distribute control part 30 that switch call is distributed at the spendable subchannel of the exterior lateral area of sub-district.
As shown in figure 10, about at the spendable subchannel of the medial region of sub-district, statistics is represented from the interference power of end, sub-district bigger, and therefore if portable terminal switches when move the end, sub-district easily, the possibility of the switching of subchannel is bigger.
In addition, the switching of subchannel needs the search of subchannel and the exchange of control signal.
And if the frequency height of the switching of subchannel, then the change fierceness of presence of intercell interference is difficult to the predicted interference amount.
In addition, especially there are the following problems in up link: because near the interference volume of the portable terminal the sub-district in the neighbor cell is increased, therefore the influence that the decline of throughput is produced is bigger.
Therefore, when the subchannel of switch call special use is not set, distribute control part 30 preferably switch call to be distributed at the spendable subchannel of the exterior lateral area of sub-district.
In addition, also can for: the medial region of sub-district is divided into a plurality of zones, distribute control part 30 with switch call distribute to cutting apart a plurality of medial region in a zone in spendable subchannel.
In this case, distribute disturbed amount or this portable terminal when interference volume of other sub-districts surpassed predetermined threshold of control part 30 in portable terminal, the preferred accurate orthogonal channel that does not rely in the behaviour in service of the subchannel of neighbor cell that uses.
In above-mentioned example, be illustrated for the mode of distributing control part 30 that the subchannel of switch call special use is not set.In this mode, can control easily.
On the other hand in above-mentioned example, because the spendable subchannel of exterior lateral area that distributes 30 pairs of switch calls of control part to be distributed in the sub-district, therefore for example under the more situation of switch call, might significant limitation can offer the communications of Mobile Terminals quality that is positioned at the end, sub-district.
Therefore, consider following method: the medial region of sub-district is divided into a plurality of zones, and spendable subchannel is used as the subchannel of switch call special use in a part of zone of a plurality of medial region that will cut apart.
But,, then when not having switch call,, therefore usually this specific subchannel is used as the low shared channel of utilization rate owing to can not effectively use this subchannel (Radio Resource) if with the subchannel of specific subchannel as the switch call special use.
In addition, distribute control part 30 also can to make and distribute the ratio of this subchannel to change adaptively according to from the sub-district and the situation of the switch call of peripheral cell to switch call.
Particularly, distribute control part 30 to control,, under the less situation of switch call, improve distributing the ratio of this subchannel beyond the switch call so that under the more situation of switch call, reduce to distributing the ratio of this subchannel beyond the switch call.
In addition, distribute control part 30 also can consider the traffic in each sub-district and determine to distribute the ratio of this subchannel.
In addition, distribute control part 30 under the situation of the subchannel that is provided with the switch call special use, also switch call to be distributed the subchannel subchannel in addition of switch call special use.
In this case, distribute control part 30 also can decide switch call to use which subchannel (subchannel beyond the subchannel of the subchannel of switch call special use or switch call special use) according to the occupation rate of the current switch call in the medial region of each sub-district or the received power of switch call etc.
In addition, in the above-described embodiment,, which position to distribute fatal problem in the not one-tenth work on the principle about the position in the data frame structure of the subchannel of distributing to switch call.
In WiMAX, at the zone of the lead code of the beginning of distribute data frame structure and the zone of distribute data, decentralized configuration known signal.
Then, utilize these known signals to carry out the acquisition or the channel estimating of time synchronized or Frequency Synchronization.
Because the portable terminal of high-speed mobile is fast with respect to its channel variation of effluxion, therefore think that the Radio Resource that uses (switch call transmitting-receiving with Radio Resource (subchannel and OFDM symbol)) is assigned in time when with the zone that is assigned lead code distance regional being arranged in this portable terminal, can't effectively utilize this lead code, cause the deterioration of the quality of reception easily.
Therefore, in the present embodiment, distribute control part 30 to determine in data frame structure, to distribute the zone of switch call as described below.
For example, as shown in Figure 4, distribute control part 30 to construct data frame structure as follows:, to preserve the information that is positioned near the portable terminal the sub-district in ensuing continuous zone in the information of preserving the portable terminal that is positioned near the portable terminal the cell boarder and is switching with the regional portion that is assigned lead code continuous zone.
Like this, in data frame structure, preferably switch call is distributed to and separated the regional near zone of being furnished with lead code.
Because the portable terminal of high-speed mobile is along with its channel variation of effluxion is big, therefore when being assigned to data frame structure back a part of by the spendable Radio Resource of this portable terminal (switch call transmitting-receiving Radio Resource), big by the variable quantity between the subchannel in lead code subchannel of estimating and the zone of having distributed switch call, be difficult to the channel estimation value that lead code has been used in effectively utilization.
On the other hand, static portable terminal is along with its channel variation of effluxion is little, even when a back zone that is assigned to by the spendable Radio Resource of this portable terminal in the data frame structure, also can effectively utilize lead code, and can be in the hope of channel estimation value.
Therefore, switch call is configured in separates the regional near zone of being furnished with lead code, will spendable radio-resource-configuration be in its back in static portable terminal (fixed terminal), all portable terminals can obtain the high channel estimation value of precision of channel estimation thus.
(the 5th execution mode)
Below, about the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first to fourth execution mode.
In above-mentioned first to fourth execution mode, the using method of the subchannel in each sub-district has been described.In each sub-district, multiplexing usually communication by a plurality of portable terminal transmitting-receivings.
In the 5th execution mode of the present invention, use basic example explanation shown in Figure 11 multiplexing method by the communication of a plurality of portable terminal transmitting-receivings.
As first method, as shown in figure 11, distribute control part 30 also can construct following data frame structure: in advance size to be fixed, be provided with the data frame structure of the regional A of the spendable Radio Resource of exterior lateral area that is distributed in the sub-district, the area B of the spendable Radio Resource of medial region that is distributed in the sub-district and subregion C (in order to reduce interference, and to reduce the utilization rate of the subchannel in the sub-district, and the zone of the Radio Resource that in this sub-district, can't use) to other sub-districts.
In this case, as shown in figure 12, distribute 30 pairs of portable terminals that are positioned at each sub-district of control part, confirm in order whether can come distributing radio resource (subchannel and OFDM symbol), and come distributing radio resource according to initial assignable burst allocation pattern by burst allocation pattern 1 to 4.
Here, distribute control part 30 to wait according to behaviour in service, received power or the SINR of other portable terminals in each sub-district that judge whether can distributing radio resource.
In addition, the traffic is few in each sub-district, the portable terminal of wireless resource allocation object requires under the very high situations such as transmission speed, distributes control part 30 also can come distributing radio resource (corresponding to the Radio Resource of a plurality of bursts) by a plurality of burst allocation patterns.
At this moment, distribute control part 30 preferred allocation in data frame structure with the continuous corresponding Radio Resource in zone (burst).
As second method, as shown in figure 13, distribute control part 30 also can construct the data frame structure of cutting apart above-mentioned zone (burst) and using along with the increase of the portable terminal number that is positioned at each sub-district.
In this case, distribute control part 30 decisions to specific portable terminal assigned region (burst).
Then, distribute control part 30, cut apart this zone (burst), distribution and the regional corresponding Radio Resource of cutting apart at each portable terminal according to be assigned to cut apart with the portable terminal of each corresponding Radio Resource in zone or wait equal in numberly according to the transmission speed that requires by each portable terminal.
In this distribution method, when being a plurality of especially in the zone of spendable Radio Resource in the medial region that is assigned in the sub-district, distribute control part 30 when decision is distributed in the Radio Resource that uses in each portable terminal regional, need to consider the situation of the portable terminal in other sub-districts.
Particularly, distribute the control part 30 also can be to each region allocation equalization Radio Resource (perhaps Gui Ding ratio), that use in portable terminal, the allocation of radio resources of using in the higher portable terminal of the portable terminal that received power is bigger or (the required quality of CINR-) be to the high zone of utilization rate.
At this moment, distribute control part 30 in each zone (burst), also can be predetermined once the multiplexing portable terminal number of assignable maximum.
(the 6th execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first to the 5th execution mode.
In above-mentioned first to the 5th execution mode, in down link, because receiving terminal is a portable terminal, so SINR (especially interference volume) can't directly be observed in the base station.
Therefore, the interference volume in the portable terminal need be obtained or estimate in the base station.
Particularly, distribute the control part 30 can be, be distributed in the medial region of sub-district or the spendable Radio Resource of exterior lateral area of sub-district (subchannel and OFDM symbol) is used as spendable Radio Resource in portable terminal (subchannel and OFDM symbol) according to received power in the up link or interference power.
On the other hand, distribute control part 30 can make portable terminal with the communication quality in the specific form report down link.
In addition, distribute control part 30 also can limit the candidate of the subchannel that portable terminal is distributed according to the received power in the up link, and require portable terminal to carry out the mensuration and the notice of communication qualities such as CQI (ChannelQuality Indicatou) information to these candidates, according to the CQI information distribution subchannel of report.
At this moment,, can think certain in this medial region, therefore need not to be determined at the communication quality (channel status) of spendable each subchannel of this medial region about communication quality at the spendable Radio Resource of medial region of sub-district.
In addition, in above-mentioned example, illustrated that the base station estimates the method for above-mentioned communication quality or use special-purpose control signal to obtain the method for this communication quality.
In IEEE802.16, portable terminal sends the CDMA sign indicating number when carrying out initial band utilization request.Here, the CDMA sign indicating number of transmission is to select at random from pre-prepd a plurality of sign indicating numbers.
And portable terminal also periodically sends the CDMA sign indicating number when not sending data, regulates to send timing, transmitted power or frequency deviation.
At this moment, the CDMA sign indicating number of transmission be from pre-prepd a plurality of sign indicating number (before being different from explanation carry out initial band utilization request the time sign indicating number) select at random.
In addition, distribute control part 30 should further be divided into a plurality of groups by pre-prepd CDMA sign indicating number, and corresponding with the kind (complete orthogonal channel or accurate orthogonal channel) of desired subchannel or subchannel.
Then, distribute control part 30, select desired subchannel, and send sign indicating number corresponding to this subchannel according to the received power of mobile terminal side or the situation of interference.
Like this,, need not to prepare in addition the control channel that the CQI transmission of Information is used, just can transmit CQI information by using ranging code (ranging code).
(the 7th execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first to the 6th execution mode.
In above-mentioned first to the 6th execution mode, the example that a plurality of base stations of same wireless communication system use the subchannel (frequency) in the specific frequency band to communicate has been described, but in the 7th execution mode of the present invention, as shown in figure 14, base station A, the B of different wireless communication system A, B use the subcarrier (frequency) in the identical frequency band to communicate.
Here, subcarrier (frequency) in the specific frequency band of a plurality of base stations use of same wireless communication system is when communicating, between the data frame structure that uses by both, by the centralized control in this wireless communication system, can be easily identical configuration be made in the zone that is assigned the zone of complete orthogonal channel and is assigned accurate orthogonal channel.
To this, as present embodiment, subcarrier (frequency) in base station A, the B of different wireless communication system A, B use identical frequency band is when communicating, shown in Figure 15 (a), between data frame structure that uses by base station A and the data frame structure that in wireless communication system B, uses, because utilization person's difference of two wireless communication systems, therefore be difficult to identical configuration is made in the zone that is assigned the zone of complete orthogonal channel and is assigned accurate orthogonal channel.Therefore, effect of the present invention might reduce.
In order to address the above problem, in the present embodiment, distribute control part 30 to determine to be assigned the zone of complete orthogonal channel and the configuration that is assigned the zone of accurate orthogonal channel by the following method.
As first method, distribute control part 30 also can decide this configuration (burst allocation pattern) according to the wireless communication system number that coexists in each zone.
Particularly, the wireless communication system number that distributes control part 30 also can be predetermined to coexist in each zone and the corresponding relation of above-mentioned configuration (being assigned the zone of complete orthogonal channel and the ratio that is assigned the zone of accurate orthogonal channel) utilize this corresponding relation to determine above-mentioned configuration.
Here, distribute control part 30 to judge the wireless communication system number that coexists in each zone according to electric wave situation on every side, also can judge the wireless communication system number that in each zone, coexists by communicating between the base station of using Common Control Channel and other wireless communication systems.
As second method, distribute the configuration of the bigger wireless communication system of the configuration that control part 30 makes the littler wireless communication system of the ratio in the zone that is assigned complete orthogonal channel and the ratio in the zone that is assigned complete orthogonal channel to conform to.
(the 8th execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with above-mentioned first to the 7th execution mode.
In carrying out the wireless communication system that face launches,, can report the arrival distance of knowing signal as one of essential factor of the coverage of restricted cell.
Therefore, usually in the wireless communication system that carries out the face expansion, on the basis of the interference between the base station A, the B that consider the different wireless communication A of system, B, can receive configuration, the distribution of subchannel and the transmission parameter of reporting signal that the mode of reporting signal decides the base station with all positions in imaginary overlay area.
Therefore, these are reported signal and preferably use the complete orthogonal sub-channels of the subchannel of guaranteeing that easily interference level is low to send.
And, subcarrier (frequency) in the specific frequency band of the base station of different wireless communication system use is when communicating, the situation of using the subcarrier (frequency) in the specific frequency band to communicate with the base station of same wireless communication system is different, being difficult in advance, estimation is difficult to determine the configuration of base station, the distribution of subchannel and the transmission mode of reporting signal from the interference volume of other base stations.
Therefore, distribute control part 30 to carry out in accordance with the following methods the subchannel of reporting signal is distributed.
As first method, distribute control part 30 also at least one can be reported signal allocation and give at the spendable subchannel of the exterior lateral area of each sub-district.
For example, as shown in figure 16, the distribution control part 30 of base station A will distribute as the Radio Resource of reporting signal that is used for sending wireless communication system A with the regional corresponding Radio Resource of the complete orthogonal channel of distribution in the data frame structure, and the distribution control part 30 of base station B will distribute with the Radio Resource of reporting signal that the regional corresponding Radio Resource conduct of the complete orthogonal channel of distribution in the data frame structure is used for sending wireless communication system B.
As second method, distribute control part 30 also can report the signal transmission and use with distributing to exclusively in the part of the spendable subchannel of exterior lateral area of each sub-district.
Particularly, distribution control part 30 identifications of each wireless communication system should not be used for transfer of data by complete orthogonal channel as the complete orthogonal channel that control channel uses.
In addition, the distribution control part 30 of each wireless communication system also can utilize the base station on every side in the same wireless communication system, discerns this complete orthogonal channel.
(the 9th execution mode)
Below, for the wireless communication system of present embodiment, serve as main describing with difference with the wireless communication system of above-mentioned first to the 8th execution mode.
In above-mentioned first to the 8th execution mode, distribute control part 30 in data frame structure, be assigned the zone and the zone (with reference to Fig. 4, Figure 16 etc.) that is assigned accurate orthogonal channel of complete orthogonal channel at time-axis direction (OFDM symbol direction).
To this, in the wireless communication system of present embodiment, as shown in figure 17, distribute control part 30 in data frame structure, be assigned the zone and the zone that is assigned accurate orthogonal channel of complete orthogonal channel in frequency axis direction (subchannel direction).
No matter be the situation that the base station of different wireless communication system uses the subcarrier (frequency) in the specific frequency band to communicate, still the situation that the subcarrier (frequency) in the specific frequency band communicates is used in the base station of same wireless communication system, can use present embodiment.
(other execution modes)
The present invention puts down in writing by above-mentioned execution mode, but the argumentation and the accompanying drawing that should not be construed as a part that constitutes the disclosure limit the present invention.According to the disclosure, those skilled in the art should understand multiple replacement execution mode, embodiment and application technology.
For example again in the present embodiment, to distribute the radio communication device of control part 30 be that example is illustrated with the base station as having, but have epigyny devices such as control device of wireless that the radio communication device that distributes control part 30 also can be the control base station or exchange.
More than, use above-mentioned execution mode to describe the present invention in detail, but it will be apparent to one skilled in the art that the execution mode that the present invention is not limited to illustrate in this manual.Can be under the situation of spirit of the present invention that does not break away from decision and scope to the invention process correction and change execution mode by the record of claim scope.Therefore, record of the present invention is a purpose to illustrate only, and the present invention is not done any restriction.
Claims (12)
1. radio communication device, it is configured in the wireless communication system, and this wireless communication system is realized FDMA with the frequency division multiplexing mode as modulation system, and is medial region and exterior lateral area with cell division, it is characterized in that,
Have the distribution control part, this distribution control part distributes complete orthogonal channel to be used as at the spendable subchannel of described exterior lateral area, divides the registration orthogonal channel to be used as at the spendable subchannel of described medial region,
As whole quadratures between the subcarrier that comprises in the described complete orthogonal channel that distributes at the spendable subchannel of the exterior lateral area of neighbor cell,
Between the subcarrier that comprises in the described accurate orthogonal channel that distributes at the spendable subchannel of the medial region of neighbor cell, a part repeats, a part of quadrature.
2. radio communication device according to claim 1 is characterized in that,
Described distribution control part is distributed in the spendable subchannel of described exterior lateral area to the expectation ripple received power portable terminal lower than predefined defined threshold, and the expectation ripple received power portable terminal higher than this defined threshold is distributed in the spendable subchannel of described medial region.
3. radio communication device according to claim 1 and 2 is characterized in that,
Described medial region is divided into a plurality of zones,
Described distribution control part distributes the different respectively accurate orthogonal channel of utilization rate to be used as the spendable subchannel of described a plurality of medial region that gets cutting apart.
4. according to any described radio communication device in the claim 1 to 3, it is characterized in that,
Described distribution control part is to the portable terminal of the exterior lateral area that is positioned at each sub-district, with the burst allocation pattern of stipulating by the combination of at least one complete orthogonal channel in the data frame structure and at least one symbol, and distributing radio resource,
Described burst allocation pattern is identical in all minizones.
5. according to any described radio communication device in the claim 1 to 4, it is characterized in that,
Described distribution control part distributes to switch call at the spendable subchannel of described exterior lateral area.
6. according to any described radio communication device in the claim 1 to 4, it is characterized in that,
Described medial region is divided into a plurality of zones,
Described distribution control part with switch call distribute to cutting apart these a plurality of medial region in a zone in spendable subchannel.
7. according to claim 5 or 6 described radio communication devices, it is characterized in that,
Described distribution control part is distributed to switch call in data frame structure and is assigned the regional near zone of lead code.
8. according to any described radio communication device in the claim 1 to 7, it is characterized in that,
Described distribution control part is according to by the communication quality in the down link of portable terminal notice, and this portable terminal is distributed in spendable subchannel in some zones in described medial region or the described exterior lateral area.
9. according to any described radio communication device in the claim 1 to 3, it is characterized in that,
Described distribution control part is to the portable terminal of the exterior lateral area that is positioned at each sub-district, with the burst allocation pattern by the combination regulation of at least one complete orthogonal channel in the data frame structure and at least one symbol, distributing radio resource;
Described distribution control part is according to electric wave situation change burst allocation pattern.
10. according to any described radio communication device in the claim 1 to 9, it is characterized in that,
Described distribution control part is reported signal allocation with at least one and is given at the spendable subchannel of described exterior lateral area.
11. according to any described radio communication device in the claim 1 to 9, it is characterized in that,
Described distribution control part will be distributed to exclusively in the part of the spendable subchannel of described exterior lateral area and report signal transmission usefulness.
12. a wireless communications method, this method is used for wireless communication system, and this wireless communication system is realized FDMA with the frequency division multiplexing mode as modulation system, and is medial region and exterior lateral area with cell division, it is characterized in that,
Have following steps: radio communication device distributes complete orthogonal channel to be used as at the spendable subchannel of described exterior lateral area, divides the registration orthogonal channel to be used as at the spendable subchannel of described medial region,
As whole quadratures between the subcarrier that comprises in the described complete orthogonal channel that distributes at the spendable subchannel of the exterior lateral area of neighbor cell,
Between the subcarrier that comprises in the described accurate orthogonal channel that distributes at the spendable subchannel of the medial region of neighbor cell, a part repeats, a part of quadrature.
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| JP2007284021A JP5156334B2 (en) | 2006-12-04 | 2007-10-31 | Wireless communication apparatus and wireless communication method |
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| JP2007-284021 | 2007-10-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102422674A (en) * | 2009-05-08 | 2012-04-18 | 索尼公司 | Communication apparatus, communication method, computer program, and communication system |
| CN102461305A (en) * | 2009-06-26 | 2012-05-16 | 高通股份有限公司 | Interference management |
| CN102111785B (en) * | 2009-12-28 | 2013-06-05 | 鼎桥通信技术有限公司 | Method for collocating relation between same frequency and pilot frequency |
| CN106688283A (en) * | 2015-03-20 | 2017-05-17 | 株式会社东芝 | Wireless communication integrated circuit and wireless communication method |
| US9775046B2 (en) | 2009-06-26 | 2017-09-26 | Qualcomm, Incorporated | Power management |
| WO2017181328A1 (en) * | 2016-04-18 | 2017-10-26 | 华为技术有限公司 | Interference coordination method, base station, and user equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5031901B2 (en) * | 2008-08-12 | 2012-09-26 | 株式会社日立製作所 | Radio communication system, radio communication apparatus, and radio resource management method |
| JP5187403B2 (en) * | 2009-01-15 | 2013-04-24 | 富士通株式会社 | Wireless communication system, base station, relay station, mobile station |
| MX2011008350A (en) | 2009-02-09 | 2011-09-01 | Lg Electronics Inc | Method for allocating backhaul link resources in relay communication system, and method & apparatus for transmitting & receiving data using same. |
| JP5248413B2 (en) * | 2009-05-27 | 2013-07-31 | 株式会社日立国際電気 | Wireless base station equipment |
| CN101909301B (en) * | 2009-06-08 | 2015-06-03 | 中兴通讯股份有限公司 | Method and system for eliminating neighbor cell interference |
| JP5198383B2 (en) * | 2009-08-13 | 2013-05-15 | 日本電信電話株式会社 | Wireless communication system, base station apparatus, and scheduling method |
| US8442001B2 (en) * | 2009-10-21 | 2013-05-14 | Qualcomm Incorporated | Systems, methods and apparatus for facilitating handover control using resource reservation with frequency reuse |
| JP5995526B2 (en) * | 2012-05-29 | 2016-09-21 | 三菱電機株式会社 | Wireless communication system |
| JP2016213890A (en) * | 2016-08-10 | 2016-12-15 | 京セラ株式会社 | Radio base station and radio communication method |
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| EP1418776B1 (en) * | 2002-11-07 | 2006-03-22 | Samsung Electronics Co., Ltd. | Frequency reuse method in an orthogonal frequency division multiplex mobile communication system (OFDM) |
| KR100965338B1 (en) * | 2003-08-18 | 2010-06-22 | 엘지전자 주식회사 | Sub-carriers allocating method for inter-cells interference reduction in ofdm cellular environments |
| KR100511554B1 (en) * | 2003-09-02 | 2005-08-31 | 한국전자통신연구원 | Method for comprising and assigning forwarding channel on orthogonal frequency division multiple access frequency division duplex |
| US9585023B2 (en) * | 2003-10-30 | 2017-02-28 | Qualcomm Incorporated | Layered reuse for a wireless communication system |
| US9294218B2 (en) * | 2004-07-16 | 2016-03-22 | Qualcomm Incorporated | Rate prediction in fractional reuse systems |
| US8144658B2 (en) * | 2005-02-11 | 2012-03-27 | Qualcomm Incorporated | Method and apparatus for mitigating interference in a wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102422674A (en) * | 2009-05-08 | 2012-04-18 | 索尼公司 | Communication apparatus, communication method, computer program, and communication system |
| CN102422674B (en) * | 2009-05-08 | 2015-11-25 | 索尼公司 | Communicator and communication means and communication system |
| CN102461305A (en) * | 2009-06-26 | 2012-05-16 | 高通股份有限公司 | Interference management |
| US8965293B2 (en) | 2009-06-26 | 2015-02-24 | Qualcomm Incorporated | Interference management |
| CN102461305B (en) * | 2009-06-26 | 2016-01-20 | 高通股份有限公司 | Interference management |
| US9775046B2 (en) | 2009-06-26 | 2017-09-26 | Qualcomm, Incorporated | Power management |
| CN102111785B (en) * | 2009-12-28 | 2013-06-05 | 鼎桥通信技术有限公司 | Method for collocating relation between same frequency and pilot frequency |
| CN106688283A (en) * | 2015-03-20 | 2017-05-17 | 株式会社东芝 | Wireless communication integrated circuit and wireless communication method |
| WO2017181328A1 (en) * | 2016-04-18 | 2017-10-26 | 华为技术有限公司 | Interference coordination method, base station, and user equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008167413A (en) | 2008-07-17 |
| CN101197653B (en) | 2010-12-22 |
| JP5156334B2 (en) | 2013-03-06 |
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