CN101790201B - Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system - Google Patents
Method and device for allocating wireless resources of single carrier orthogonal frequency division multiplexing system Download PDFInfo
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Abstract
The invention discloses a method for allocating wireless resources of a single carrier orthogonal frequency division multiplexing system. The method is carried out in each time slot and comprises the following steps of: acquiring a channel state index of each user on each wireless resource block of each time slot and sorting to obtain the superior-inferior sequence of channel indexes each resource block of each user; determining the allocation priority according to the bandwidth requirement of the user on the current time slot; allocating wireless resource blocks in the system to each user according to the sequence from high to low of the allocation priority and the principle; and allocating the optimal set of channel indexes of a central wireless resource block selected from allocable wireless resource blocks meeting the bandwidth requirement of the user to the user. The invention also discloses a device for allocating the wireless resources of the single carrier orthogonal frequency division multiplexing system. The invention can dynamically and self-adaptively adjust the wireless resources occupied by each user on each time slot, improve the throughout rate of total data of the system as much as possible and simultaneously reduce the complexity for realization.
Description
Technical field
The present invention relates to ofdm system, relate in particular to the method and apparatus of allocation of radio resources in a kind of single carrier orthogonal frequency division multiplexing system.
Background technology
OFDM (OFDM) technology is a kind of multi-carrier modulation technology, wireless frequency spectrum is divided into several orthogonal sub-carriers by it, user's high speed data signal stream transmitted by going here and there and converting several low speed sub data flows to and be modulated on each subcarrier simultaneously.Due to characteristic mutually orthogonal between subcarrier, can greatly reduce mutual interference (ICI), and improve the utilance of wireless frequency spectrum.The single carrier orthogonal frequency division multiplexing technology (SC-FDMA) developing on orthogonal frequency division multiplexi basis has advantages of low peak-to-average power ratio, has been established and has become up key technology in following wireless mobile communications (B3G).
Because wireless frequency spectrum has been divided into some subcarriers, signal is in the division of time dimension in addition, the Radio Resource in ofdm system because of but one time, the structure of two dimension frequently.Usually, on frequency domain, comprise several subcarriers, comprise in time several OFDM symbols time, frequently two-dimensional structure is defined as a wireless resource block (Resource Block, referred to as RB).Wireless resource block is the base unit of allocation of radio resources in ofdm system; And single carrier orthogonal frequency division multiplexing technical stipulation is distributed to same user several continuous wireless resource blocks on time slot.
In existing single carrier orthogonal frequency division multiplexing system, distributing radio resource piece is normally realized by fixed allocation or by predefined pseudo random sequence mode of frequency hopping between time slot.
As shown in Figure 1, be the allocation of radio resources mode schematic diagram of available technology adopting pseudo-random hopping.User 1 takies 4 RB, and user 2 takies 2 RB, and user 3 takies 3 RB; At first time slot, user 1 take system 2,3,4,5}RB, and user 2 take system 8,9}RB, user 3 takies system { 13,14,15}RB; At second time slot, user 1 take system 10,11,12,13}RB ...; The RB that each user takies on each time slot is good according to predefined frequency hop sequences defined, irrelevant with the Real-time Channel state in user's wireless environment of living in.
Adopt the mode of distributing like this to have following shortcoming:
A. can not carry out dynamic self-adapting distribution according to user's channel status, frequency spectrum service efficiency is not high.In practical wireless communication systems, each user's channel is incoherent often, such as on time slot 1, may the { 2,3,4,5}RB is the frequency range not good for user 1, and is exactly reasonable for user 2; But the existing method of salary distribution is owing to being predefined, user 1 just can only be fixed at this time slot { 2,3,4,5}RB is upper, can not be optimized adjustment so.
B. the bandwidth that user takies on different time-gap is fixed, and does not consider that upper-layer service, Qos (Quality of Service, service quality) are worth the dynamic change at any time to wireless bandwidth demand.
For improving the utilance of system, the people such as Verdu have proposed to utilize water-filling method (the IEEE Trans.Information Theory of channel information dynamic assignment subcarrier and carrier transmit power, 39 (3): 773-785, May 1993.R.S.Cheng and S.Verd ' u.Gaussian multiaccess channels with ISI:Capacity region and multiuser water-filling), adopt the shannon limit that can reach in theory in this way channel capacity; But this method need to support all allocative decisions to travel through to system, then every possible method of salary distribution traveling through is recalculated to user's subchannel index, carry out repeatedly iteration, expense, the complexity of system are all high, so only there is theoretic value again.
Summary of the invention
The technical problem to be solved in the present invention is exactly for the deficiencies in the prior art, the method and apparatus that a kind of wireless resources of single carrier orthogonal frequency division multiplexing system distributes is proposed, the shared Radio Resource of each user on can the each time slot of dynamic self-adapting has reduced again the complexity realizing in improving as much as possible system total data throughput.
In order to solve the problems of the technologies described above, the invention provides a kind of method that wireless resources of single carrier orthogonal frequency division multiplexing system distributes, described method is carried out following steps at each time slot:
Obtain the channel status index of each user on each wireless resource block of the described time slot line ordering of going forward side by side, obtain each user's wireless resource block Information Channel Index order of quality;
Bandwidth demand according to user in current time slots is determined distribution priority; And
According to distribute order from high to low of priority to each user by the wireless resource block in following principle distribution system: meet user bandwidth demand size can distributing radio resource piece group in select this user of component dispensing of the channel status index optimum of center wireless resource block.
Further, described channel status index is one of signal to noise ratio, channel capacity, logarithm channel capacity or combination in any.
Further, described distribution priority specifically refers to: the priority of giving user assignment Radio Resource;
Bandwidth demand size according to user in current time slots is determined distribution priority: the large user of bandwidth demand in current time slots has high priority, first distributes; The little user of bandwidth demand in current time slots has low priority, rear distribution.
Further, described bandwidth demand dynamically by user the application layer business on each time slot or service quality rating determine.
Further, refer to described distribution specifically: in described wireless resource block group, any wireless resource block is not all assigned to other user;
Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
Further, after wireless resource block is distributed to each user, also carry out:
Judge whether user to be subject to distributing interference effect and cause original Radio Resource distributing cannot meet the situation that application layer business or service quality rating require, if having, according to user's distribution priority adjust, distributing radio resource piece.
The step of described adjustment further,, distributing radio resource piece comprises:
The user that cannot meet application layer business or service quality rating requirement to the Radio Resource of original distribution expands new wireless resource block;
If having distributed to other user's wireless resource block, the neutralization of the process of expansion clashes the adjustment that wireless resource block of affected user is increased, moved.
Further, the described wireless resource block to affected user increases, follow described user assignment priority when mobile adjustment, in the time that the distribution pattern generating of two different priority users is conflicted, the user of high priority does not adjust, and the user of low priority adjusts; In the time that two same priority users' distribution pattern generating is conflicted, determine at random a user or specify a user to adjust.
In order to solve the problems of the technologies described above, the present invention also provides a kind of wireless resources of single carrier orthogonal frequency division multiplexing system assigned unit, comprises channel status estimation and order module and distribution module,
Wherein, described channel status is estimated and order module is used for obtaining the channel status index of each user on each wireless resource block of the described time slot line ordering of going forward side by side, and the each user's who obtains wireless resource block Information Channel Index order of quality is passed to described distribution module;
Described distribution module is for the definite priority of distributing of the bandwidth demand in current time slots according to user; And for according to distribute order from high to low of priority to each user by the wireless resource block of following principle distribution system: meet user bandwidth demand size can distributing radio resource piece group in select this user of component dispensing of the channel status index optimum of center wireless resource block.
Further, described channel status index is one of signal to noise ratio, channel capacity, logarithm channel capacity or combination in any.
Further, described distribution priority specifically refers to: the priority of giving user assignment Radio Resource;
Bandwidth demand size according to user in current time slots is determined distribution priority: the large user of bandwidth demand in current time slots has high priority, first distributes; The little user of bandwidth demand in current time slots has low priority, rear distribution.
Further, described bandwidth demand dynamically by user the application layer business on each time slot or service quality rating determine.
Further, refer to described distribution specifically: in described wireless resource block group, any wireless resource block is not all assigned to other user; Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
Further, described device also comprises adjusting module, described adjusting module is connected with described distribution module, be used for according to the allocation result of distribution module, judge whether user to be subject to distributing interference effect and cause original Radio Resource distributing cannot meet the situation of application layer business or service quality rating requirement, if have, according to user's the adjustment of distribution priority, distributing radio resource piece.
Further, described adjusting module is further used for cannot meeting to the Radio Resource of original distribution the user that application layer business or service quality rating require and expands new wireless resource block; If having distributed to other user's wireless resource block, the neutralization of the process of expansion clashes the adjustment that wireless resource block of affected user is increased, moved.
Further, the adjustment that described adjusting module increases, moves the wireless resource block of affected user, follows described user assignment priority, in the time that the allocation result of two different priority users produces conflict, the user of high priority does not adjust, and the user of low priority adjusts; In the time that two same priority users' allocation result produces conflict, determine at random a user or specify a user to move.
The present invention has following beneficial effect:
1, the system bandwidth that user's distribution priority is taken on each time slot by user is definite, and the user that bandwidth demand is large enjoys the high priority of distributing, and priority allocation can make the total data throughput of system maximize so as far as possible.
2, be similar to the sub-channel of these continuous wireless resource blocks of the actual user of distributing to the channel status index of the wireless resource block of the interior midpoint of several continuous wireless resource blocks (being called wireless resource block group), and using this index as the foundation of distributing, reduce like this implementation complexity distributing.
3, distribute and adjustment process only need to operate once in order, without iteration repeatedly, overhead is low.
4, the upper-layer service demand of the bandwidth (wireless resource block number) of distributing to user with this user on different time-gap, Qos grade and channel status and dynamically determine, improved first floor system to high-rise adaptivity and the utilization ratio of radio frequency resources.
Accompanying drawing explanation
Fig. 1 is the allocation of radio resources pattern schematic diagram that prior art adopts pseudo-random hopping.
Fig. 2 is the method flow diagram of the embodiment of the present invention;
Fig. 3 is sub-channel structure and the subchannel index schematic diagram in ofdm system;
Fig. 4 is the schematic diagram of the device of the embodiment of the present invention;
Fig. 5 is that the wireless resource block of application example of the present invention distributes pattern schematic diagram;
Fig. 6 is that the wireless resource block of application example of the present invention is adjusted pattern schematic diagram;
Fig. 7 is the simulation result figure of application example of the present invention.
Embodiment
In the present invention, according to the user determined distribution priority of bandwidth demand size and active user sub-channel index on each time slot, wireless resource block is distributed, having advantages of can be dynamically, self adaptation is adjusted the shared Radio Resource of each user on each time slot.User's sub-channel index is similar to by the channel status index of this user wireless resource block of center in continuous wireless resource block (being called wireless resource block group).Can in improving as much as possible system total data throughput, reduce again like this complexity realizing.
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
As shown in Figure 2, the method for the embodiment of the present invention is carried out following steps at each time slot:
Wherein, described channel status index includes but not limited to signal to noise ratio, channel capacity, logarithm channel capacity one or a combination set of;
Estimate to obtain the channel status index of each user on each wireless resource block, the method for described estimation is prior art, repeats no more herein;
Because a wireless resource block can be regarded a channel as concerning a user, to there being a channel status index (with reference to Fig. 3).For each user, described channel status index is sorted, can obtain each user's wireless resource block Information Channel Index order, correspondingly, the corresponding wireless resource block Information Channel Index sequencing table of each user.Before the good wireless resource block row of channel status index, after the poor wireless resource block of channel status index is arranged;
Wherein, according to distribute order from high to low of priority to each user by the wireless resource block in following principle distribution system: this user of component dispensing of chooser channel status index optimum in the assignable wireless resource block group that meets user bandwidth demand size.
Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
Refer to described distribution specifically: any one wireless resource block in described wireless resource block group is not all assigned to other user.
Described sub-channel index is similar to by the channel status index of this user wireless resource block of center in wireless resource block group.If the number of wireless resource block is even number in this wireless resource block group, can be using any one wireless resource block (or specifying one of them) in the wireless resource block of two, center in described wireless resource block group as Gai Zu center wireless resource block;
The determined distribution priority of bandwidth demand size according to user in current time slots, the sequencing distributing:, in current time slots, the user that bandwidth demand is large has high priority, priority allocation; The user that bandwidth demand is little in current time slots has low priority, rear distribution.
The described bandwidth demand in current time slots is (the being application layer) business of the upper strata on this time slot or Qos classification by user.Because user's upper-layer service is dynamic change on different time-gap, therefore accordingly, user's bandwidth demand is also with time slot dynamic change.
Give each user in conjunction with each user's wireless resource block Information Channel Index sequencing table the allocation of radio resources of system by user's distribution priority orders, particularly, when to certain user assignment wireless resource block group, in system, in all assignable wireless resource block groups that meet this user bandwidth demand size, a component of chooser Information Channel Index optimum (Ji Gaizu center wireless resource block Information Channel Index is the most forward) is given this user.
Wherein, step 203 is optional step, can cause interference to system owing to being assigned with the wireless resource block taking, other user's subchannel index is reduced, likely cause the bandwidth of the original distribution of some users to meet the demands, therefore these users are expanded to new wireless resource block, the wireless resource block of likely and distributing to again other user in the process of expansion clashes, this step is exactly that the wireless resource block of affected user is increased to (wireless resource block), the adjustment of mobile (distribution pattern), when adjustment, in same follow procedures 202, determined user's distribution priority orders is carried out, in the time that the distribution pattern generating of two different priority users is conflicted, the user of high priority does not adjust, the user of low priority adjusts, in the time that two same priority users' distribution pattern generating is conflicted, can determine at random that a user (or specifying a user) adjusts.
The described user to low priority adjusts specifically and refers to: find a wireless resource block group that can meet the bandwidth demand after this user's expansion in place recently at the original distribution pattern of this user, and the arbitrary wireless resource block in this group is also not yet assigned to other user, this user's new distribution pattern is moved in this wireless resource block group.
As shown in Figure 4, the device of the embodiment of the present invention comprises channel status estimation and order module, distribution module and adjusting module, and described three sequence of modules connect;
Wherein, described channel status is estimated and order module is used for obtaining the channel status index of each user on each wireless resource block of the described time slot line ordering of going forward side by side, and the each user's who obtains wireless resource block Information Channel Index order of quality is passed to described distribution module;
Described distribution module is for the definite priority of distributing of the bandwidth demand in current time slots according to user; And for according to distribute order from high to low of priority to each user by the wireless resource block of following principle distribution system: meet user bandwidth demand size can distributing radio resource piece group in select this user of component dispensing of the channel status index optimum of center wireless resource block.
Described adjusting module is optional module, be used for according to the allocation result of distribution module, judge whether user to be subject to distributing interference effect and cause original Radio Resource distributing cannot meet the situation of application layer business or service quality rating requirement, if have, according to user's the adjustment of distribution priority, distributing radio resource piece.
Complete action sequence of above 3 module compositions carries out once in the duration interval of each time slot.
Wherein, described channel status index is including, but not limited to signal to noise ratio, channel capacity, logarithm channel capacity one or a combination set of;
Bandwidth demand size according to user in current time slots is determined distribution priority: the large user of bandwidth demand in current time slots has high priority, first distributes; The little user of bandwidth demand in current time slots has low priority, rear distribution.
Described bandwidth demand dynamically by user the application layer business on each time slot or service quality rating determine;
Refer to described distribution specifically: in described wireless resource block group, any wireless resource block is not all assigned to other user;
Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
Described channel status is estimated and order module is further used for estimating to obtain the channel status index of each user on each wireless resource block, and for each user, described channel status index is sorted, corresponding each user has a wireless resource block Information Channel Index sequencing table, and described wireless resource block Information Channel Index sequencing table is sent to distribution module;
Described adjusting module is further used for cannot meeting to the Radio Resource of original distribution the user that application layer business or service quality rating require and expands new wireless resource block; If the neutralization of the process of expansion has been distributed to other user's wireless resource block and clashed, the wireless resource block of affected user is increased the adjustment of wireless resource block, movement (distribution pattern).
Described adjusting module increases the adjustment of wireless resource block, movement (distribution pattern) to the wireless resource block of affected user, follow described user assignment priority, in the time that the allocation result of two different priority users produces conflict, the user of high priority does not adjust, and the user of low priority adjusts; In the time that two same priority users' allocation result produces conflict, determine at random a user or specify a user to move.
The user that needs are moved, find a wireless resource block group that can meet the bandwidth demand after this user's expansion in place recently at its original distribution pattern, and the arbitrary wireless resource block in this group is also not yet assigned to other user, this user's new distribution pattern is moved in this wireless resource block group.
Below with an application example concrete example explanation.
First, channel status is estimated and order module is estimated the Real-time Channel state index of each user on the each wireless resource block line ordering of going forward side by side.
With reference to Fig. 3, for ofdm system, what wireless resource block (RB) was corresponding is exactly on a time slot, frequency domain is 12 subcarriers, time domain is that the time-frequency two-dimensional structure of 6 or 7 OFDM symbols is (in figure, subcarrier of a line display in RB, an OFDM symbol is shown in a list).On a time slot, the corresponding each RB of each user has a channel status index.This index can be signal to noise ratio, channel capacity, logarithm channel capacity one of them or combination in any.If this index has reflected, this wireless resource block is distributed to certain user, this user's obtainable received signal quality of institute and data throughput.Take signal to noise ratio (SNR) as example, its definition is signal power (P
signal) and noise power (P
noise), interfering signal power sum (∑ p
int erference) ratio (in the time of original allocation, because all RB are unloaded, therefore distracter is zero).
The channel status index of acquisition is sorted as the foundation of next step (resource distribution) for each user:
To user 1, SNR
rB_i> SNR
rB_j> ... > SNR
rB_l
To user 2, SNR
rB_p> SNR
rB_q> ... > SNR
rB_t
To user 3 ... ..
Wherein, i, j, l, p, q, t is the sequence number of wireless resource block.
Then, distribution module is carried out two steps:
Step 1, according to sort their distribution priority of each user demand of bandwidth on this time slot.
Bandwidth demand derives from upper layer application business, the Qos index etc. of this user in current time slots.The user of bandwidth demand maximum has best result and joins priority, and the user of bandwidth demand minimum has lowest priority.
Step 2, gives each user assignment Radio Resource by definite priority orders.
Distribute and meet following two conditions:
A. continuous several RB (being RB group) that are assigned with are idle in system;
B. under the prerequisite that meets A, it is the most forward in the channel status index sequence that channel status is estimated and order module is exported being assigned with that RB of RBZu center (centre).(if the RB number of described RB group is even number, in the middle of it, has two RB, can specify RB centered by one of them RB, is as the criterion with the channel status index of this RB)
Understand how to meet above-mentioned two conditions with reference to Fig. 5, system will be three user assignment Radio Resources at this time slot.User 1 bandwidth demand maximum (taking 5 RB), have the first priority, therefore he can select in all system bandwidth resources, user 1 10}RB upper signal channel index the best, the wireless resource block that user 1 is assigned with is so exactly { centered by 10}RB and the up and down RB group of each two RB, the { 8 by, 9,10,11,12}RB; User 3 bandwidth demand is 3 RB, have the second priority, according to the clooating sequence that channel status is estimated and order module is exported, user 3 optimal wireless Resource Block is { 7}RB, so corresponding RB group (taking subchannel) is exactly { 6,7,8}, but because the { 8}RB is occupied, so can only select time good RB group, i.e. { 2,3,4}RB; Similarly, user 2 is assigned to RB group: { 14,15}RB.
Because the total data throughput of system is each user data throughput sum, can improve as much as possible system total data throughput with right of distribution more preferably therefore to bandwidth weighting large user.In addition, because the width of a RB in frequency is much smaller than the coherence bandwidth of wireless channel, therefore can think that this user is also preferably at the subchannel of some each RB centered by better RB, therefore be used as distributing according to being rational with the index of the whole distribution bandwidth of channel status index approximate substitution of center RB.
In the time of practical application, the step 1 (determine and distribute priority) of distribution module can walk abreast and carry out with the step that channel status is estimated and order module is carried out, also can first carry out the step 1 of distribution module, carry out again the step of channel status estimation and order module, then carry out the step 2 of distribution module.As long as distribution module obtains user's distribution priority, and user's wireless resource block Information Channel Index order, just can carry out the distribution of wireless resource block.
Finally, adjusting module adjusts accordingly:
Can cause interference to other CU channel in system when being assigned with the wireless resource block transmitted signal taking, the index of these channels is reduced, sometimes even can cause original user's of distributing to bandwidth cannot meet the requirement of upper-layer service, Qos etc., therefore affected user need to expand more wireless resource block, and in expansion process, may clash with the wireless resource block of distributing to other users the adjustment that therefore again these users' wireless resource block is increased, moved.The object of adjusting module is exactly in order to realize above-mentioned adjustment function, adjusts and carries out according to definite before distribution priority orders equally.
With reference to Fig. 6, due to inter-user interference, user 1 and user 2 need respectively to expand 2 and 1 RB, user 1 priority is higher than user 2, therefore preferentially expand to 7 ..., 13}RB, user 2 expands the RB occupying with user 1 after RB and overlaps, user 2 priority is lower than user 1, thereby on user 2, moves a RB, to the { 15,16,17}RB.
Above-mentioned steps is carried out once at the duration interval of each time slot.
With reference to Fig. 7, for the simulation result figure of the present invention's one application example, in this application example, comprise 10 users, the RB number (initial value) that each user need to take according to upper-layer service demand is as follows:
| User's sequence number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| The RB number (initially) that need to take | 2 | 1 | 1 | 5 | 4 | 5 | 4 | 10 | 10 | 9 |
As can be seen from the figure, adopt system data throughput of the present invention to be greater than and adopt fixed allocation Radio Resource mode and the allocation of radio resources mode that adopts pseudo-random hopping, be similar to water-filling method.
In sum, the present invention can the each time slot of dynamic self-adapting on the shared Radio Resource of each user, in improving as much as possible system total data throughput, reduce again the complexity realizing, can be applicable in the E-NodeB (base station of evolution) in B3G.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (14)
1. the method that wireless resources of single carrier orthogonal frequency division multiplexing system distributes, is characterized in that, described method is carried out following steps at each time slot:
Obtain the channel status index of each user on each wireless resource block of the described time slot line ordering of going forward side by side, obtain each user's wireless resource block Information Channel Index order of quality;
Bandwidth demand according to user in current time slots is determined distribution priority; And
According to distribute order from high to low of priority to each user by the wireless resource block in following principle distribution system: meet user bandwidth demand size can distributing radio resource piece group in select this user of component dispensing of the channel status index optimum of center wireless resource block;
Wherein, described bandwidth demand dynamically by user the application layer business on each time slot or service quality rating determine.
2. the method for claim 1, is characterized in that, described channel status index is one of signal to noise ratio, channel capacity, logarithm channel capacity or combination in any.
3. the method for claim 1, is characterized in that, described distribution priority specifically refers to: the priority of giving user assignment Radio Resource;
Bandwidth demand size according to user in current time slots is determined distribution priority: the large user of bandwidth demand in current time slots has high priority, first distributes; The little user of bandwidth demand in current time slots has low priority, rear distribution.
4. the method for claim 1, is characterized in that, refers to described distribution specifically: in described wireless resource block group, any wireless resource block is not all assigned to other user;
Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
5. the method for claim 1, is characterized in that, after wireless resource block is distributed to each user, also carries out:
Judge whether user to be subject to distributing interference effect and cause original Radio Resource distributing cannot meet the situation that application layer business or service quality rating require, if having, according to user's distribution priority adjust, distributing radio resource piece.
6. method as claimed in claim 5, is characterized in that, the step of described adjustment, distributing radio resource piece comprises:
The user that cannot meet application layer business or service quality rating requirement to the Radio Resource of original distribution expands new wireless resource block;
If having distributed to other user's wireless resource block, the neutralization of the process of expansion clashes the adjustment that wireless resource block of affected user is increased, moved.
7. method as claimed in claim 6, it is characterized in that, the described wireless resource block to affected user increases, follow described user assignment priority when mobile adjustment, in the time that the distribution pattern generating of two different priority users is conflicted, the user of high priority does not adjust, and the user of low priority adjusts; In the time that two same priority users' distribution pattern generating is conflicted, determine at random a user or specify a user to adjust.
8. a wireless resources of single carrier orthogonal frequency division multiplexing system assigned unit, is characterized in that, comprises channel status estimation and order module and distribution module,
Wherein, described channel status is estimated and order module is used for obtaining the channel status index of each user on each wireless resource block of the each time slot line ordering of going forward side by side, and the each user's who obtains wireless resource block Information Channel Index order of quality is passed to described distribution module;
Described distribution module is for the definite priority of distributing of the bandwidth demand in current time slots according to user; And for according to distribute order from high to low of priority to each user by the wireless resource block of following principle distribution system: meet user bandwidth demand size can distributing radio resource piece group in select this user of component dispensing of the channel status index optimum of center wireless resource block;
Wherein, described bandwidth demand dynamically by user the application layer business on each time slot or service quality rating determine.
9. device as claimed in claim 8, is characterized in that, described channel status index is one of signal to noise ratio, channel capacity, logarithm channel capacity or combination in any.
10. device as claimed in claim 8, is characterized in that, described distribution priority specifically refers to: the priority of giving user assignment Radio Resource;
Bandwidth demand size according to user in current time slots is determined distribution priority: the large user of bandwidth demand in current time slots has high priority, first distributes; The little user of bandwidth demand in current time slots has low priority, rear distribution.
11. devices as claimed in claim 8, is characterized in that, refer to described distribution specifically: in described wireless resource block group, any wireless resource block is not all assigned to other user; Described wireless resource block group specifically refers to: the wireless resource block of a wireless resource block or multiple adjacent continuous.
12. devices as claimed in claim 8, it is characterized in that, described device also comprises adjusting module, described adjusting module is connected with described distribution module, be used for according to the allocation result of distribution module, judge whether user to be subject to distributing interference effect and cause original Radio Resource distributing cannot meet the situation that application layer business or service quality rating require, if having, according to user's distribution priority adjust, distributing radio resource piece.
13. devices as claimed in claim 8, is characterized in that, described adjusting module is further used for cannot meeting to the Radio Resource of original distribution the user that application layer business or service quality rating require and expands new wireless resource block; If having distributed to other user's wireless resource block, the neutralization of the process of expansion clashes the adjustment that wireless resource block of affected user is increased, moved.
14. devices as claimed in claim 13, it is characterized in that, the adjustment that described adjusting module increases, moves the wireless resource block of affected user, follow described user assignment priority, in the time that the allocation result of two different priority users produces conflict, the user of high priority does not adjust, and the user of low priority adjusts; In the time that two same priority users' allocation result produces conflict, determine at random a user or specify a user to move.
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|---|---|---|---|---|
| CN101917769B (en) * | 2010-08-20 | 2013-04-24 | 浙江大学 | Uplink resource allocation and scheduling method of OFDMA (Orthogonal Frequency Division Multiple Access) system based on 802.16m |
| CN102457866B (en) | 2010-10-29 | 2015-05-20 | 中兴通讯股份有限公司 | Method and device for establishing network in wireless network |
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| CN103841646A (en) * | 2012-11-23 | 2014-06-04 | 北京信威通信技术股份有限公司 | Wireless resource allocation method capable of ensuring service quality |
| CN104320853B (en) * | 2014-10-23 | 2017-12-01 | 大唐移动通信设备有限公司 | A kind of carrier wave sequence and balanced method and apparatus |
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