CN102196587B - Wireless-resource-dispatching method during multi-cell cooperation in relay-aided communication system - Google Patents
Wireless-resource-dispatching method during multi-cell cooperation in relay-aided communication system Download PDFInfo
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Abstract
The invention discloses a wireless-resource-dispatching method during multi-cell cooperation in a relay-aided communication system. A relay-aided and multi-cell-cooperation communication system used in the dispatching method comprises M cells, wherein each cell comprises a sending end, L relay forwarding stations and N mobile receiving terminals; and in the relay-aided and multi-cell-cooperation communication system, the transmission of a same time-frequency resource of each cell dispatches only one mobile receiving terminal. By the method, the interference coordination among the cells can be performed in an adaptive way on the premise of realizing a limited cooperation among the cells and ensuring the fairness between the users, so the spectral efficiency of the communication system is obviously improved; and compared with the conventional channel-state-based wireless-resource-dispatching technology, the adaptive interference coordinating scheme is optimal.
Description
Technical field
The present invention relates to wireless communication field, particularly relate in a kind of relaying auxiliary communication system scheduling method for wireless resource when considering multi-cell cooperating.
Background technology
In early days about the research of dynamic resource scheduling problem is mainly limited to single cell system, each transmitting terminal processes separately the signal of all mobile reception ends in its Serving cell; Using the mobile reception end signal from other communities as interference signal, thus result in the interference-limited characteristic of multi-cell system, this mobile reception end for cell edge place is particularly outstanding.How dispatching the mobile reception end of multiple cell better, make dispatched mobile reception end more reasonably can use system resource, effectively to weaken the adverse effect of presence of intercell interference, is multiple cell dynamic resource scheduling key issue to be solved.
We usually adopt the spectrum efficiency promoting communication system based on the Wireless Scheduling Algorithms of channel status and link circuit self-adapting strategy.In actual environment, the RRM of down link normally carries out based on the downlink channel conditions of prediction.In conventional cellular network, the transmitter of each community is transmitting terminal, and therefore, within the regular hour, we can make full use of the otherness of each mobile reception end channel by channel estimating.But, owing to comprising the transmitter state (transmitting terminal in sector and relay forwarding station are alternately in ON/OFF state) of the cellular network Zhong Ge community at relay forwarding station along with time change, according to the channel status of the unpredictable subsequent time of channel condition when pre-test, it is uncertain that this phenomenon the present invention is referred to as interference.Now, we are difficult to utilize traditional method to carry out link circuit self-adapting and the RRM based on channel status.
The present invention proposes a kind of relaying that is applicable to and assist the novel radio resource regulating method with multi-cell cooperative communication system, can the maximization realizing system spectral efficiency under mobile reception end fairness and minizone only exchange the prerequisite of limited information ensured.Put forward the fairness that algorithm adopts the proportional fair algorithm (PF) of expansion to ensure between mobile reception end; Cause proportional fair scheduling may be dispatched to the situation of the poor mobile reception end of channel condition for interference is uncertain, the present invention utilizes the adaptive disturbance coordination technique based on multi-cell cooperating to carry out the further optimization of allocation of radio resources.
Summary of the invention
technical problem:in order to overcome the deficiencies in the prior art, the invention provides in a kind of relaying auxiliary communication system scheduling method for wireless resource when considering multi-cell cooperating, under guarantee mobile reception end fairness and minizone only exchange the prerequisite of limited parameter, obtain higher spectrum efficiency.
technical scheme:for achieving the above object, scheduling method for wireless resource when considering multi-cell cooperating in a kind of relaying auxiliary communication system that the present invention adopts is: the relaying in described dispatching method is auxiliary comprises M community with multi-cell cooperative communication system, a community comprises a transmitting terminal, a L relay forwarding station and N number of mobile reception end, described relaying is auxiliary and multi-cell cooperative communication system Zhong Yige community is each on same running time-frequency resource transmits an only scheduling mobile reception end, wherein M be greater than 1 integer, L, N be all be more than or equal to 1 integer; Described dispatching method comprises the steps:
1) mobile reception end determination service node and dominant interference node, and the transmitting terminal relevant information of this service node and dominant interference node being fed back to affiliated subdistrict;
2) the mobile reception end that each transmitting terminal utilizes corresponding wireless resource scheduling algorithm to be respectively served distributes time/frequency source block, then exchanges the time-frequency resource allocating information of this community with neighbor cell;
3) each transmitting terminal is according to the time-frequency resource allocating information of neighbor cell, and the adaptive mobile reception end to being scheduled carries out interference coordination;
4) each transmitting terminal is respectively the adaptive selection modulation of the mobile reception end be scheduled and coded system;
5) each transmitting terminal and the relay forwarding station running time-frequency resource that utilizes front dispatching office to distribute and the modulation coding mode determined send signal to mobile reception end;
6) mobile reception end adopts corresponding receiver Received signal strength according to system configuration, and carries out decoding and processing.
In described step 1), the method for mobile reception end determination service node and dominant interference node is the reference signal of mobile reception end receiving downlink and calculates the received power of each transmitting terminal, then determines service node and dominant interference node.
In described step 1), the relevant information of described service node and dominant interference node comprises the call number of service node and dominant interference node and corresponding received power.
Described step 2) in, method that served mobile reception end distributes time/frequency source block is to utilize corresponding wireless resource scheduling algorithm to be respectively: it is that served mobile reception end distributes running time-frequency resource that transmitting terminal utilizes based on the wireless resource scheduling algorithm of channel status and current channel condition information, then exchanges the time-frequency resource allocating information of this community with neighbor cell.
The distribution condition of time/frequency source block between transmitting terminal and relay forwarding station of the time-frequency resource allocating information Shi Zhe community of this community described.
In described step 3), each transmitting terminal is according to the time-frequency resource allocating information of neighbor cell, the method that the adaptive mobile reception end to being scheduled carries out interference coordination is: each transmitting terminal estimates the reception Signal to Interference plus Noise Ratio of the mobile reception end that is scheduled according to the time-frequency resource allocating information of neighbor cell, then carries out adaptive interference coordination according to the Signal to Interference plus Noise Ratio estimated.
Described adaptive interference coordination is: if the mobile reception end be scheduled next time slot estimate Signal to Interference plus Noise Ratio lower than preset Signal to Interference plus Noise Ratio thresholding, then interference coordination is carried out to this mobile reception end; Otherwise be left intact.
In described step 4), each transmitting terminal be respectively the mobile reception end be scheduled adaptive selection modulation and coded system be transmitting terminal according to the Signal to Interference plus Noise Ratio estimated, and utilize traditional link adaptation techniques to be that the adaptive selection of mobile reception end be scheduled is modulated and coded system.
In described step 5), the running time-frequency resource that each transmitting terminal and relay forwarding station utilize front dispatching office to distribute and the method that the modulation coding mode determined sends signal to mobile reception end are: corresponding process is made according to system configuration and the modulation determined and the signal of coded system to mobile reception end in transmitting terminal and relay forwarding station, then on pre-assigned running time-frequency resource, sends information.
The running time-frequency resource that described dispatching office distributes is transmitting terminal according to after dispatching based on the Wireless Scheduling Algorithms of channel status and adaptive interference coordination technique, is the Radio Resource of mobile reception end distribution.
When transmitting terminal adopts the wireless resource scheduling algorithm based on channel status, the present invention adopts a kind of novel proportional fair scheduling, and concrete mode is as follows: transmitting terminal and jumps the grand access link momentary rate between mobile reception end
wherein in above formula
be
the instantaneous of the grand access link of bar reaches data rate.
Equivalent periodic line momentary rate between transmitting terminal and double bounce mobile reception end is
wherein in above formula
be
instantaneous between bar relay forwarding station and mobile reception termination incoming link reaches data rate,
for the instantaneous achievable rate between this relay forwarding station and transmitting terminal.The virtual link of these two-hop link equivalences is by the Radio Resource of contention system together with the grand access link of transmitting terminal.
After obtaining the instantaneous achievable rate of above-mentioned equivalence, this patent by according to traditional proportional fair algorithm be relay forwarding station and mobile reception end distribute time frequency resource block,
be
the mean data rate of bar link a period of time in the past.
Transmitting terminal is according to the time-frequency resource allocating information of neighbor cell, the service node of mobile reception end feedback and the call number of dominant interference node and downlink reference signal received power value, estimate the reception Signal to Interference plus Noise Ratio value of this mobile reception end that is scheduled, can be expressed as
wherein
for the downlink received power value of service node,
be
the downlink received power value of individual dominant interference node,
be similar to ON/OFF switch, when interfering nodes also will send signal in the time/frequency source block of dispatching this mobile reception end, value is 1; Otherwise value is 0.
it is additive white Gaussian noise.
beneficial effect:scheduling method for wireless resource during multi-cell cooperating is considered in relaying auxiliary communication system provided by the invention, first each community utilizes the proportional fair algorithm of expansion to carry out wireless resource scheduling in a distributed manner respectively, and this algorithm synthesis considers the channel condition of two-hop link (transmitting terminal-relay forwarding station link and relay forwarding station-mobile reception end link).Secondly, the uncertainty with interference source in multi-cell cooperative communication system is assisted for relaying, the assignment information of shared time/frequency source block is needed between neighbor cell, utilize the interference coordination technique taking into account scheduling fairness to avoid the mobile reception end of scheduling channel condition extreme difference more further, eliminate the impact of disturbance fluctuation on the wireless resource scheduling algorithm based on channel status.Finally, according to the dominant interferer information of mobile reception end feedback and the reception Signal to Interference plus Noise Ratio of downlink reference signal received power value prediction mobile reception end, and the Signal to Interference plus Noise Ratio of prediction and traditional link circuit self-adapting strategy is utilized to be mobile reception end selection modulation and coded system.Assist in multi-cell communication systems at relaying, compared with traditional proportional fair algorithm, under the prerequisite that the inventive method can only exchange limited information in minizone and ensure mobile reception end fairness, significantly promote cell edge mobile reception end spectrum efficiency and cell average spectral efficiency.
Accompanying drawing explanation
Fig. 1 is that the structural representation with multi-cell cooperative communication system assisted by the relaying in the inventive method;
Fig. 2 is the algorithm flow chart of the inventive method;
Fig. 3 is the mapping of back haul link and virtual link in New Type Proportional fair scheduling algorithm of the present invention;
Fig. 4 is the mobile reception end spectrum efficiency cumulative probability distribution map of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
The cooperative cluster comprising a M community with multi-cell cooperative communication system assisted by relaying in described scheduling method for wireless resource, a community comprises L relay forwarding station and N number of mobile reception end, described relaying is assisted with in the community of in multi-cell cooperative communication system, transmits at every turn on same running time-frequency resource, only dispatches a mobile reception end; Wherein M be greater than 1 integer, L, N be all be more than or equal to 1 integer; Described scheduling method for wireless resource comprises the steps:
1) reference signal of mobile reception end receiving downlink, and the Reference Signal Received Power value calculated accordingly from each transmitting terminal, determine service node and the dominant interference node of this mobile reception end again, and the relevant information of this service node and dominant interference node is fed back to the transmitting terminal of affiliated subdistrict; Described relevant information can be call number and the Reference Signal Received Power value of this node;
2) transmitting terminal is respective served mobile reception end distribution running time-frequency resource according to wireless resource scheduling strategy and current channel condition in a distributed manner, then exchanges the information of radio resource allocation of this community with neighbor cell; Described resource allocation information can be the assignment information of time/frequency source block between transmitting terminal and relay forwarding station, such as " 0 " represents that transmitting terminal will send information in this time/frequency source block, " K " (span is 1, N, stands in the call number of this community corresponding to relay forwarding) represent K relay forwarding station will in this time/frequency source block transmission information;
3) transmitting terminal utilizes the feedback information of mobile reception end in the time/frequency source block assignment information of neighbor cell and described step 1) to estimate the reception Signal to Interference plus Noise Ratio of the mobile reception end that is scheduled, and carries out adaptive interference coordination;
4) transmitting terminal is that the mobile reception end be scheduled selects modulation and coded system according to the Signal to Interference plus Noise Ratio estimated and traditional link adaptation techniques;
5), after transmitting terminal and relay forwarding station process the signal that needs send accordingly according to system configuration and set modulation coding mode, mobile reception end is sent to;
6) mobile reception end Received signal strength, row relax of going forward side by side.
In described step 1), the relevant information of above-mentioned node according to the received power value determination service node of downlink reference signal and dominant interference node, and is fed back to the transmitting terminal of affiliated subdistrict by mobile reception end; Such as the call number of this node and received power value (after equal interval quantizing) are fed back to the transmitting terminal of affiliated subdistrict.
Described step 2) in, each transmitting terminal is served mobile reception end distributing radio resource in a distributed manner, and the relevant information of this allocation of radio resources situation is sent to neighbor cell; Such as the information (required bit number is the resource block number in community) representing this resource allocation conditions is sent to neighbor cell.
Described step 2) in, described neighbor cell is the ground floor community be scheduled around mobile reception end affiliated subdistrict.
In described scheduling method for wireless resource, first mobile reception end needs the received power value according to downlink reference signal, judge that whether a certain transmitting terminal is the dominant interference node of this mobile reception end, if the determination result is YES, namely when the interference of this transmitting terminal is larger, then in step 1), the call number of this transmitting terminal and corresponding received power value are fed back to the transmitting terminal of affiliated subdistrict by mobile reception end; In step 3), when estimating the reception Signal to Interference plus Noise Ratio of mobile reception end, need the interference considering this transmitting terminal, better to carry out link circuit self-adapting and interference coordination.If judged result is no, then in step 1), mobile reception end does not need any information feeding back this transmitting terminal, to reduce feedback overhead; In step 3), when estimating the reception Signal to Interference plus Noise Ratio of mobile reception end, do not need the interference considering this transmitting terminal.
Described mobile reception end can obtain whole downlink reference signal, and the received power value of each transmitting terminal downlink reference signal can be obtained, and determine service node and dominant interference node, then the call number of respective nodes and received power value are fed back to the transmitting terminal of affiliated subdistrict.
Described wireless resource scheduling strategy is the wireless resource scheduling strategy based on channel status.
Described each community all needs to use identical resource block scheduling unit, and described resource block scheduling unit at least comprises a time/frequency source block; Described step 2) in, each transmitting terminal is served mobile reception end distribution time/frequency source block according to wireless resource scheduling strategy and current channel condition in a distributed manner, and the information representing respective affiliated subdistrict time/frequency source block distribution condition is sent to neighbor cell, the call number that the information of described representative affiliated subdistrict resource allocation conditions separately stands in this community by a succession of transmitting terminal or relay forwarding forms.
Described adaptive interference coordination technique is the reception Signal to Interference plus Noise Ratio value that transmitting terminal estimates the mobile reception end that is scheduled, and judge whether this value is greater than the Signal to Interference plus Noise Ratio threshold value of systemic presupposition, if the determination result is YES, next time slot i.e., when the interference that this mobile reception end receives is larger, then in step 3), be in channel condition under same service node other mobile reception ends preferably by changing scheduling into this mobile reception end.If judged result is no, i.e. next time slot, when the interference that this mobile reception end is subject to is less, then in step 3), this scheduling is left intact.
In described step 4), transmitting terminal utilizes the reception Signal to Interference plus Noise Ratio estimated to be the adaptive selection modulation of mobile reception end and coded system that are scheduled.
In described step 6), mobile reception end adopts corresponding receiver Received signal strength according to system configuration, and carries out to the received signal decoding and processing.
When the dominant interference node that in described step 1), mobile reception end process calculating downlink reference signal received power obtains is too much, will the dominant interference node disturbing more than one maximum interfering nodes as this mobile reception end be selected, to reduce feedback overhead.
Be illustrated in figure 2 the algorithm flow chart of the inventive method.In Fig. 2 first by each transmitting terminal according to novel proportional fair algorithm be in a distributed manner institute Serving cell mobile reception end distribute time/frequency source block; Then, the distribution condition of time/frequency source block is sent to neighbor cell by transmitting terminal; Again, each transmitting terminal estimates the reception Signal to Interference plus Noise Ratio of the mobile reception end that is scheduled according to the feedback information of the resource allocation conditions of neighbor cell and mobile reception end, and carries out corresponding adaptive disturbance coordination; Finally, each transmitting terminal is that each receiving terminal be scheduled selects modulation and coded system adaptively according to the reception Signal to Interference plus Noise Ratio of prediction.Now a complete wireless resource scheduling process completes: transmitting terminal and relay forwarding station to after needing the signal sent to process accordingly, send to mobile reception end according to system configuration and the modulation coding mode determined; Mobile reception end Received signal strength, row relax of going forward side by side.Specific algorithm is as follows: step a: determine service node and dominant interference node
(a1) mobile reception end calculates the received power value of each transmitting terminal according to the reference signal of down link, and the node selecting downlink reference signal received power maximum is service node; Now the community at service node place is the affiliated subdistrict of this mobile reception end;
(a2) if the difference of the Reference Signal Received Power that obtained by K transmitting node of mobile reception end and its service node Reference Signal Received Power is less than default thresholding, now, namely K transmitting node is the dominant interference node of mobile reception end; Described K transmitting node can for arbitrary transmitting node of taking off mourning clothes outside business node; If the dominant interference node number calculated thus has exceeded the upper limit set by system, then choose and disturbed more than one maximum node as its dominant interference node to mobile reception end;
(a3) call number of service node and dominant interference node and received power value are fed back to the transmitting terminal of affiliated subdistrict by mobile reception end.
Step b: the proportional fair scheduling distributing radio resource adopting expansion
(b1) allocation of radio resources
(b1-1) for grand access link:
wherein
be
the instantaneous of hop link reaches data rate
(b1-2) relay forwarding station is needed to carry out the two-hop link forwarded for communication between transmitting terminal and mobile reception end:
wherein
for the administrative mobile reception end in relay forwarding station
instantaneous achievable rate,
for the momentary rate of back haul link between transmitting terminal and relay forwarding station.Now, mobile reception end
double bounce Mean Speed using the equivalent rate as this two-hop link, the mapping of back haul link and virtual link as shown in Figure 3, this equivalent periodic line by the Radio Resource of contention system together with grand access link,
wherein
be
the mean data rate of bar link a period of time in the past.
(b2) distribution condition of this community time/frequency source block between transmitting terminal and relay forwarding station is sent to neighbor cell by transmitting terminal
Step c: step b, according to the preliminary distribution completing Radio Resource in community based on the wireless resource scheduling algorithm of channel status and current channel condition information, in order to obtain better systematic function, needs to carry out adaptive interference coordination further
(c1) each transmitting terminal is according to the feedback information of the resource allocation conditions of neighbor cell and mobile reception end, and prediction is scheduled the reception Signal to Interference plus Noise Ratio of mobile reception end
wherein
for the received power of service node,
be
the received power of individual dominant interference node,
be similar to ON/OFF switch, when interfering nodes also will send signal in the time/frequency source block of dispatching this mobile reception end, value is 1; Otherwise value is 0.
that additive white Gaussian noise (c2) adaptive disturbance coordinates (c2-1) when the mobile reception termination receipts Signal to Interference plus Noise Ratio predicted is greater than pre-determined threshold: now, illustrate that the mobile reception end channel condition be scheduled is better, be left intact.(c2-2) when the mobile reception termination predicted receives Signal to Interference plus Noise Ratio lower than pre-determined threshold: then think that the mobile reception end channel condition be scheduled is very poor.Now transmitting terminal will utilize the dispatching algorithm adopted in step a to change scheduling into and this mobile reception end is in channel condition under same service node all the other mobile reception ends preferably.Now, although change the mobile reception end be scheduled, because itself and former mobile reception end belong to same service node, the resource allocation conditions between transmitting terminal and relay station does not change.Therefore for the mobile reception end that other are scheduled, its disturbed condition is not affected.It should be noted that, when the mobile reception end of continuous several times scheduling is not all scheduled because of the reason of interference coordination, no longer will carry out interference coordination to this mobile reception end; Meanwhile, if repeatedly after interference coordination, when all changing the identical a certain mobile reception end of scheduling into, later interference coordination will not be considered to dispatch this mobile reception end; This will ensure the scheduling fairness of channel condition extreme difference mobile reception end, and avoids the mobile reception end that repeatedly scheduling channel condition is fabulous.
Fig. 4 is the Performance comparision of mobile receiving terminal spectrum efficiency under different situations.Simulation parameter is consistent with parameter in Table A .2.2-1 in 3GPP TR36.814 technical documentation.As shown in the figure, performance curve of the present invention is identical with the proportional fair algorithm of expansion and the performance curve trend of traditional proportional fair algorithm, therefore the present invention does not affect the fairness between mobile reception end.The uncertainty of disturbance state has had a strong impact on the performance of proportional fairness dispatch algorithm.New Type Proportional fair algorithm has considered the channel condition of two-hop link, therefore performance is better than traditional proportional fair scheduling.The present invention, owing to reasonably avoiding the probabilistic impact of interference, significantly improves the spectrum efficiency of the overall and edge mobile reception end in community, well obtains the performance gain that introducing relaying brings.Gain mainly comes from four aspects, the introducing of relaying improves the channel condition of edge mobile reception end, adopt the wireless resource scheduling algorithm based on the limited cooperation in minizone effectively can avoid interference the uncertain impact on dispatching algorithm, more accurate Signal to Interference plus Noise Ratio is estimated better to carry out link circuit self-adapting, reduces the interference of minizone when transmitting terminal is in resting state.In relay enhanced cellular network, compared with traditional proportional fair algorithm, under the prerequisite that the present invention can only exchange limited information in minizone and ensure user fairness, significantly promote cell edge mobile reception end spectrum efficiency and cell average spectral efficiency.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. in a relaying auxiliary communication system, consider scheduling method for wireless resource during multi-cell cooperating, it is characterized in that: the relaying in described dispatching method is auxiliary comprises M community with multi-cell cooperative communication system, a community comprises a transmitting terminal, a L relay forwarding station and N number of mobile reception end, described relaying is auxiliary and multi-cell cooperative communication system Zhong Yige community is each on same running time-frequency resource transmits an only scheduling mobile reception end, wherein M be greater than 1 integer, L, N be all be more than or equal to 1 integer; Described dispatching method comprises the steps:
1) mobile reception end determination service node and dominant interference node, and the transmitting terminal relevant information of this service node and dominant interference node being fed back to affiliated subdistrict;
2) the mobile reception end that each transmitting terminal utilizes corresponding wireless resource scheduling algorithm to be respectively served distributes time/frequency source block, then exchanges the time-frequency resource allocating information of this community with neighbor cell;
3) each transmitting terminal is according to the time-frequency resource allocating information of neighbor cell, and the adaptive mobile reception end to being scheduled carries out interference coordination;
4) each transmitting terminal is respectively the adaptive selection modulation of the mobile reception end be scheduled and coded system;
5) each transmitting terminal and the relay forwarding station running time-frequency resource that utilizes front dispatching office to distribute and the modulation coding mode determined send signal to mobile reception end;
6) mobile reception end adopts corresponding receiver Received signal strength according to system configuration, and carries out decoding and processing;
Described step 1) in, the method for mobile reception end determination service node and dominant interference node is the reference signal of mobile reception end receiving downlink and calculates the received power of each transmitting terminal, then determines service node and dominant interference node;
Described step 1) in, the relevant information of described service node and dominant interference node comprises the call number of service node and dominant interference node and corresponding received power;
Described step 2) in, method that served mobile reception end distributes time/frequency source block is to utilize corresponding wireless resource scheduling algorithm to be respectively: it is that served mobile reception end distributes running time-frequency resource that transmitting terminal utilizes based on the wireless resource scheduling algorithm of channel status and current channel condition information;
The distribution condition of time/frequency source block between transmitting terminal and relay forwarding station of the time-frequency resource allocating information Shi Zhe community of this community described;
Described step 3) in, each transmitting terminal is according to the time-frequency resource allocating information of neighbor cell, the method that the adaptive mobile reception end to being scheduled carries out interference coordination is: each transmitting terminal estimates the reception Signal to Interference plus Noise Ratio of the mobile reception end that is scheduled according to the time-frequency resource allocating information of neighbor cell, then carries out adaptive interference coordination according to the reception Signal to Interference plus Noise Ratio estimated;
Described adaptive interference coordination is: if the mobile reception end be scheduled receives Signal to Interference plus Noise Ratio lower than the Signal to Interference plus Noise Ratio thresholding preset estimating of next time slot, then carry out interference coordination to this mobile reception end; Otherwise be left intact;
Described step 4) in, each transmitting terminal be respectively the mobile reception end be scheduled adaptive selection modulation and coded system be transmitting terminal according to the reception Signal to Interference plus Noise Ratio estimated, and utilize traditional link adaptation techniques to be that the adaptive selection of mobile reception end be scheduled is modulated and coded system;
Described step 5) in, the running time-frequency resource that each transmitting terminal and relay forwarding station utilize front dispatching office to distribute and the method that the modulation coding mode determined sends signal to mobile reception end are: corresponding process is made according to system configuration and the modulation determined and the signal of coded system to mobile reception end in transmitting terminal and relay forwarding station, then on pre-assigned running time-frequency resource, sends information.
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| CN103501542B (en) * | 2013-09-29 | 2016-08-10 | 武汉邮电科学研究院 | A kind of method of self adaptation equitable proportion |
| CN105187163A (en) * | 2015-09-25 | 2015-12-23 | 河海大学 | Multi-cell joint adaptive modulation coding method based on round robin scheduling |
| CN108934030B (en) * | 2018-07-19 | 2021-08-03 | 中信科移动通信技术股份有限公司 | Method for avoiding cross interference of IAB base station |
| CN113242064B (en) * | 2021-05-12 | 2022-06-21 | 上海科技大学 | Multi-cell scheduling method based on user spatial domain characteristics and channel prediction |
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