CN101272173A - Road loss compensation factor setting method - Google Patents
Road loss compensation factor setting method Download PDFInfo
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- CN101272173A CN101272173A CNA2008100961997A CN200810096199A CN101272173A CN 101272173 A CN101272173 A CN 101272173A CN A2008100961997 A CNA2008100961997 A CN A2008100961997A CN 200810096199 A CN200810096199 A CN 200810096199A CN 101272173 A CN101272173 A CN 101272173A
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- compensation factor
- loss compensation
- relay station
- road loss
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a method for setting a line loss compensation factor; wherein, a method comprises the steps that: a base station BS determines the value range of the line loss compensation factor according to the line loss measured by the RS; the base station BS determines the initial value and adjustment step size of the line loss compensation factor according to the QoS priority of the RS and determines the adjustment field of the line loss compensation factor on the basis of the value range; the BS determines the line loss compensation factor according to the determined initial value, adjustment step size and adjustment field of the line loss compensation factor and calculates the uplink transmitted power of the RS according to the determined line loss compensation factor; the BS determines the value range and adjustment step size of the RS line loss compensation factor which is measured by the RS; the BS informs the uplink transmitted power of the RS and the value range and adjustment step size of the RS line loss compensation factor by the uplink authorization. The method improves the effectiveness of the uplink power control.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of road loss compensation factor setting method.
Background technology
In follow-on broadband wireless communication network, particularly having relay station (RelayStation, abbreviation RS) in the junction network, because RS itself has user terminal (User Terminal simultaneously, abbreviate UT as) and base station (Base Station, abbreviate BS as) characteristic, therefore, reducing presence of intercell interference in the junction network effectively according to the characteristics of RS self becomes a key factor that improves minizone UT throughput and average UT throughput effectively and is faced with formidable challenges.
At present, in IEEE 802.16j, IMT-Advanced, WINNER, all propose to adopt methods such as interference randomization, interference coordination, interference eliminated to solve the problem of presence of intercell interference.The UT that gives chapter and verse in the Long Term Evolution (Long-Term Evolution abbreviates LTE as) is divided into internal layer and skin to the strong jamming level of all neighbor cells with cell coverage area, and adopts the method for control of part power and path loss compensation to solve presence of intercell interference.Wherein, internal layer is the zone that does not have presence of intercell interference, uses the total power compensation; And outer zone for having presence of intercell interference, the method that adopts control of part power and path loss to compensate solves the problem of presence of intercell interference.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: though propose to adopt the part power control of layering and the method that path loss compensates among the LTE, road loss compensation factor is set to the subclass of a 3bit, but how the road loss compensation factor that does not provide the 3bit subclass uses effectively, and how to make the 3bit subclass shorten the time of up-link power control effectively.
Summary of the invention
The present invention aims to provide a kind of road loss compensation factor setting method, to solve the problem of presence of intercell interference.
According to an aspect of the present invention, provide a kind of road loss compensation factor setting method.
Road loss compensation factor setting method in the embodiment of the invention comprises: the path loss that the base station is measured according to relay station is determined the span of road loss compensation factor; Based on the span of determining, the base station is determined the initial value of road loss compensation factor and is adjusted step-length according to the service quality priority of relay station, and definite road loss compensation factor is adjusted field; The base station is adjusted field according to initial value, adjustment step-length and the road loss compensation factor of the road loss compensation factor of determining and is determined road loss compensation factor, and calculates the up-link transmission power of relay station according to the road loss compensation factor of determining; The path loss that the base station is measured according to relay station is determined the span of relay station road loss compensation factor and is adjusted step-length; The base station is by the span and the adjustment step-length of the up-link transmission power and the relay station road loss compensation factor of uplink grant notice relay station.
Preferably, this road loss compensation factor setting method also comprises: the span of relay station receiving uplink transmitting power and relay station road loss compensation factor and adjustment step-length; Relay station is adjusted the up-link transmission power of user terminal according to up-link transmission power; Based on the span of relay station road loss compensation factor, relay station is determined the initial value of relay station road loss compensation factor and is adjusted step-length according to the service quality priority of user terminal, and definite relay station road loss compensation factor is adjusted field; Relay station is according to the initial value of the relay station road loss compensation factor of determining and adjust step-length and the relay station road loss compensation factor is adjusted field and determined the relay station road loss compensation factor, and calculates the up-link transmission power of user terminal according to the relay station road loss compensation factor of determining; Relay station is by the up-link transmission power of uplink grant informing user terminal.
Wherein, road loss compensation factor adjustment field comprises: value identification field, initial value identification field, step-length identification field.
According to an aspect of the present invention, also provide a kind of road loss compensation factor setting method.
Road loss compensation factor setting method in the embodiment of the invention comprises: relay station receives span and the adjustment step-length of base station by the up-link transmission power and the relay station road loss compensation factor of the relay station of uplink grant notice; Relay station is adjusted the up-link transmission power of user terminal according to up-link transmission power; Based on the span of relay station road loss compensation factor, relay station is determined the initial value of relay station road loss compensation factor and is adjusted step-length according to the service quality priority of user terminal, and definite relay station road loss compensation factor is adjusted field; Relay station is according to the initial value of the relay station road loss compensation factor of determining and adjust step-length and the relay station road loss compensation factor is adjusted field and determined the relay station road loss compensation factor, and calculates the up-link transmission power of user terminal according to the relay station road loss compensation factor of determining; Relay station is by the up-link transmission power of uplink grant informing user terminal.
Wherein, road loss compensation factor adjustment field comprises: value identification field, initial value identification field, step-length identification field.
According to an aspect of the present invention, also provide a kind of road loss compensation factor setting method.
Road loss compensation factor setting method in the embodiment of the invention comprises: the Network Layering structure is determined according to the area dividing threshold value in the base station; The path loss that the base station is measured according to relay station is determined the span of the road loss compensation factor of different layerings; Based on the span of determining, the initial value and the adjustment step-length of the road loss compensation factor of different layerings determined in the base station according to the service quality priority of relay station, and definite road loss compensation factor is adjusted field; The base station is according to the initial value of the road loss compensation factor of determining and adjust step-length and road loss compensation factor is adjusted field and determined road loss compensation factor, and calculates the up-link transmission power of relay station according to the road loss compensation factor of determining; The path loss that the base station is measured according to relay station is determined the span of relay station road loss compensation factor and is adjusted step-length; The base station is by the span and the adjustment step-length of the up-link transmission power and the relay station road loss compensation factor of uplink grant notice relay station.
Preferably, this road loss compensation factor setting method also comprises: the span of relay station receiving uplink transmitting power and relay station road loss compensation factor and adjustment step-length; Relay station is determined the Network Layering structure according to the area dividing threshold value; Relay station is adjusted the up-link transmission power of user terminal according to up-link transmission power; Based on the span of relay station road loss compensation factor, relay station is determined the initial value and the adjustment step-length of the relay station road loss compensation factor of different layerings according to the service quality priority of user terminal, and definite relay station road loss compensation factor is adjusted field; Relay station is according to the initial value and the adjustment step-length of the relay station road loss compensation factor of the different layerings of determining, and the relay station road loss compensation factor adjusts field and determines the relay station road loss compensation factor, and calculates the up-link transmission power of user terminal according to the relay station road loss compensation factor of determining; Relay station is by the up-link transmission power of uplink grant informing user terminal.
Wherein, road loss compensation factor adjustment field comprises: layered identification field, value identification field, initial value identification field, step-length identification field.The network hierarchy structure comprises: internal layer, transition region and skin.
According to an aspect of the present invention, also provide a kind of road loss compensation factor setting method.
Road loss compensation factor setting method in the embodiment of the invention comprises: relay station receives the span and the adjustment step-length of the up-link transmission power and the relay station road loss compensation factor of relay station; Relay station is determined the Network Layering structure according to the area dividing threshold value; Relay station is adjusted the up-link transmission power of user terminal according to up-link transmission power; Based on the span of relay station road loss compensation factor, relay station is determined the initial value and the adjustment step-length of the relay station road loss compensation factor of different layerings according to the service quality priority of user terminal, and definite relay station road loss compensation factor is adjusted field; Relay station is according to the initial value and the adjustment step-length of the relay station road loss compensation factor of the different layerings of determining, and the relay station road loss compensation factor adjusts field and determines the relay station road loss compensation factor, and calculates the up-link transmission power of user terminal according to the relay station road loss compensation factor of determining; Relay station is by the up-link transmission power of uplink grant informing user terminal.
Wherein, road loss compensation factor adjustment field comprises: layered identification field, value identification field, initial value identification field, step-length identification field.The network hierarchy structure comprises: internal layer, transition region and skin.
Above embodiment has shortened the up-link power control time by the modification method of road loss compensation factor and up-link power control reasonably is set, and improves the validity of up-link power control, significantly reduces overhead.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to a kind of road loss compensation factor setting method of the embodiment of the invention;
Fig. 2 is the flow chart according to the another kind of road loss compensation factor setting method of the embodiment of the invention;
Fig. 3 is the flow chart according to the another kind of road loss compensation factor setting method of the embodiment of the invention;
Fig. 4 is the flow chart according to the another kind of road loss compensation factor setting method of the embodiment of the invention;
Fig. 5 is the schematic diagram according to the hierarchy of the cordless communication network of the embodiment of the invention;
Fig. 6 is the schematic diagram according to the road loss compensation factor setting of the embodiment of the invention;
Fig. 7 is a schematic diagram of adjusting field according to the road loss compensation factor of the embodiment of the invention;
Fig. 8 (a) and Fig. 8 (b) are the realization flow figure according to road loss compensation factor of the present invention and up-link power control adjustment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
According to the embodiment of the invention, provide a kind of by the modification method of road loss compensation factor and up-link power control reasonably is set, this method can be under the prerequisite that reduces overhead effectively, shorten the required time of up-link power control, improve the validity of up-link power control.Said method relates to the road loss compensation factor obtaining value method of base station (BS) and power control is revised, the road loss compensation factor obtaining value method of relay station (RS) and power control are revised.
Method embodiment one
According to the embodiment of the invention, provide a kind of road loss compensation factor setting method, promptly, the road loss compensation factor obtaining value method of BS and power control are revised, Fig. 1 is the flow chart according to the road loss compensation factor setting method of the embodiment of the invention, and as shown in Figure 1, this method comprises:
Step S102, the path loss that BS measures according to RS is determined the span of road loss compensation factor;
Step S104, based on the span of determining, BS determines the initial value of road loss compensation factor and adjusts step-length according to service quality (Quality of Service the abbreviates QoS as) priority of RS, and definite road loss compensation factor is adjusted field; Here the road loss compensation factor of mentioning is adjusted field and is comprised: value identification field, initial value identification field, step-length identification field
Step S106, BS adjust field according to initial value, adjustment step-length and the road loss compensation factor of the road loss compensation factor of determining and determine road loss compensation factor, and calculate the up-link transmission power of RS according to the road loss compensation factor of determining;
Step S108, the path loss that BS measures according to RS determine the span of RS road loss compensation factor and adjust step-length;
Step S110, BS is by the span and the adjustment step-length of up-link transmission power and the RS road loss compensation factor of uplink grant notice RS.
Above embodiment has shortened the up-link power control time by the modification method of road loss compensation factor and up-link power control reasonably is set, and improves the validity of up-link power control, significantly reduces overhead.
Further, in step S102: because the value of road loss compensation factor is between 0～1, wherein, the path loss compensation is not carried out in 0 representative, and on behalf of system-wide, 1 decrease compensation, therefore, BS determines the span of road loss compensation factor, in fact is exactly the type that determines whether to select in up link the path loss compensation.
And, road loss compensation factor can be quantized and successive value, centrifugal pump is similar to the subclass that is provided with among the LTE, and the successive value in the road loss compensation factor span that successive value can be between 0～1 or any BS determines, successive value the dynamic adjusting range that has increased road loss compensation factor is set, help adjusting subtly up-link transmission power.
The service quality of RS (QoS) priority has been represented different quality of service requirements, also represented the minimum quality of service demand of the user terminal (UT) of affiliated service quality (QoS) priority, among the present invention, by different road loss compensation factor preliminary adjustment value being set for different service quality (QoS) priority and adjusting step-length, under the prerequisite that satisfies the minimum quality of service demand at least, shorten the adjustment time of up-link power control, improve the validity of up-link power control.And, the initial value of the road loss compensation factor of different service quality (QoS) priority can approach 1, also can approach 0, the corresponding step-length of adjusting may be on the occasion of also may being negative value, that is, for the UT of different service quality (QoS) priority, adjustment process can be to adjust toward big from little, also can be from big past little adjustment, increase the flexibility that the control of road loss compensation factor and up-link power is adjusted.
Simultaneously, actual for the adjustment of the up-link power of RS among the BS is that RS is handled as the UT that inserts BS, has reflected the characteristic of RS as UT.
Method embodiment two
According to the embodiment of the invention, also provide a kind of road loss compensation factor setting method, promptly, the road loss compensation factor obtaining value method of RS and power control modification method, Fig. 2 is the flow chart according to the another kind of road loss compensation factor setting method of the embodiment of the invention, and as shown in Figure 2, this method comprises:
Step S202, RS receive span and the adjustment step-length of BS by up-link transmission power and the RS road loss compensation factor of the RS of uplink grant notice;
Step S204, RS adjust the up-link transmission power of UT according to up-link transmission power;
Step S206, based on the span of RS road loss compensation factor, RS determines the initial value of RS road loss compensation factor and adjusts step-length according to the service quality priority of UT, and definite RS road loss compensation factor is adjusted field; Here the road loss compensation factor of mentioning is adjusted field and is comprised: value identification field, initial value identification field, step-length identification field;
Step S208, RS is according to the initial value of the RS road loss compensation factor of determining and adjust step-length and the RS road loss compensation factor is adjusted field and determined the RS road loss compensation factor, and calculates the up-link transmission power of UT according to the RS road loss compensation factor of determining;
Step S210, RS is by the up-link transmission power of uplink grant notice UT.
Above embodiment has shortened the up-link power control time by the modification method of road loss compensation factor and up-link power control reasonably is set, and improves the validity of up-link power control, significantly reduces overhead.
Further, in step S202: RS receives the up-link transmission power of BS by the uplink grant notice, BS at first adjust BS＜-RS between the transmitting power of up link, effectively reduce the interference of RS to BS, strengthen BS＜-RS between the robustness of up link, and then improve the throughput of RS and the average throughput of whole junction network.
Further, in step S204: RS receives span and the adjustment step-length of BS by the road loss compensation factor of uplink grant notice, because RS is in the wireless network that BS covers, therefore, the span of the road loss compensation factor of RS and adjust the restriction that step-length will be subjected to self residing wireless network region, also limited simultaneously RS＜-UT between the up link road loss compensation factor span and adjust step-length.
Therefore, RS＜-UT between the adjustment of up link be subjected to the restriction of two conditions simultaneously:
(1) restriction in RS BS coverage radio network of living in network zone;
(2) the residing RS of UT covers the restriction of the network area of being hit by a bullet.
Integrating step S206, two above-mentioned restrictive conditions have been considered simultaneously, and considered the BS characteristic of RS as UT in the institute overlay area, BS being provided with on the basis that the RS up-link power is controlled by road loss compensation factor, finish the adjustment of RS to the road loss compensation factor of the UT of its subordinate, and then reduce the interference of UT, thereby improve the uplink throughput of UT to the RS and the BS of its subordinate.
Method embodiment three
According to the embodiment of the invention, a kind of road loss compensation factor setting method also is provided, Fig. 3 is the flow chart according to the another kind of road loss compensation factor setting method of the embodiment of the invention, this method comprises:
Step S302, BS determines the Network Layering structure according to the area dividing threshold value;
Step S304, the path loss that BS measures according to RS is determined the span of the road loss compensation factor of different layerings;
Step S306, based on the span of determining, BS determines the initial value and the adjustment step-length of the road loss compensation factor of different layerings according to the service quality priority of RS, and definite road loss compensation factor is adjusted field;
Step S308, BS is according to the initial value of the road loss compensation factor of determining and adjust step-length and road loss compensation factor is adjusted field and determined road loss compensation factor, and calculates the up-link transmission power of RS according to the road loss compensation factor of determining;
Step S310, the path loss that BS measures according to RS determine the span of RS road loss compensation factor and adjust step-length;
Step S312, BS is by the span and the adjustment step-length of up-link transmission power and the RS road loss compensation factor of uplink grant notice RS.
Above embodiment in different layerings by reasonably be provided with road loss compensation factor and up-link power control modification method, effectively reducing under the prerequisite of overhead, shorten the required time of up-link power control, improve the validity of up-link power control.
Below further describe each details in the above-mentioned processing.
Preferably, in step S302, BS determines that the network hierarchy structure can comprise internal layer, transition region and outer zone.
In step S304, owing under the different layerings, consider factors such as Inter-Cell Interference Coordination, road loss compensation factor may be different, and therefore, BS will determine the span of the road loss compensation factor in the different layerings.
The road loss compensation factor of mentioning in step S306 is adjusted field and is comprised four parts, Fig. 7 shows road loss compensation factor and adjusts field, as shown in Figure 7, comprise: layered identification field, value identification field, initial value identification field, step-length identification field, be respectively applied for sign, effective step-length that the initial value that the span of the residing zone of UT, road loss compensation factor, the road loss compensation factor under the different QoS priority are provided with, road loss compensation factor are adjusted amounts to 2bit information.
Road loss compensation factor is adjusted four parts of field, can carry out suitable adjustment according to the demand of network, and for example, when not having layering in the network, road loss compensation factor adjustment field can not comprise the layered identification field so; As required, when the span of the road loss compensation factor of the UT of all QoS priority correspondences was all identical, road loss compensation factor is adjusted field can not comprise the value identification field, can further reduce the expense of system like this in network.
The setting of road loss compensation factor adjustment field is identical with BS among the RS, but adjust in four parts of field, the span of road loss compensation factor, initial value and effective step-length need be determined in conjunction with road loss compensation factor span and effective step-length that BS determines by uplink grant.
Method embodiment four
According to the embodiment of the invention, a kind of road loss compensation factor setting method also is provided, Fig. 4 is the flow chart according to the road loss compensation factor setting method of the embodiment of the invention, as shown in Figure 4, this method comprises:
Step S402, RS receive the span and the adjustment step-length of up-link transmission power and the RS road loss compensation factor of RS;
Step S404, RS determines the Network Layering structure according to the area dividing threshold value;
Step S406, RS adjust the up-link transmission power of UT according to up-link transmission power;
Step S408, based on the span of RS road loss compensation factor, RS determines the initial value and the adjustment step-length of the RS road loss compensation factor of different layerings according to the service quality priority of UT, and definite RS road loss compensation factor is adjusted field;
Step S410, RS is according to the initial value and the adjustment step-length of the RS road loss compensation factor of the different layerings of determining, and the RS road loss compensation factor adjusts field and determines the RS road loss compensation factor, and calculates the up-link transmission power of UT according to the RS road loss compensation factor of determining;
Step S412, RS is by the up-link transmission power of uplink grant notice UT.
Above embodiment is by the layering to overlay area in the cordless communication network, further refinement network, and adjust the setting of field by road loss compensation factor, the adjustment of road loss compensation factor under the different layerings and up-link power control is unified to handle, reduced the complexity of system and the expense of system.And road loss compensation factor can be set to centrifugal pump and successive value, has increased the dynamic adjusting range of road loss compensation factor, helps meticulous adjustment up-link transmission power.
Further, in step S404, BS determines that the network hierarchy structure comprises internal layer, transition region and outer zone.
Further, in step S408, road loss compensation factor is adjusted field and is comprised four parts: layered identification field, value identification field, initial value identification field, step-length identification field, be respectively applied for sign, effective step-length that the initial value that the span of the residing zone of UT, road loss compensation factor, the road loss compensation factor under the different QoS priority are provided with, road loss compensation factor are adjusted amounts to 2bit information.
Further, RS receives the up-link transmission power by BS calculating by the uplink grant notice, and this part is that RS is handled as a kind of special UT, reduces the interference of RS to BS, improves the RS uplink throughput.
Simultaneously, RS receives by the span of the definite RS road loss compensation factor of the BS of uplink grant notice and adjusts step-length, owing to consider the interference of RS to BS, therefore, BS will be according to the residing network area of RS, determine the span of the road loss compensation factor that RS can use the UT of its subordinate and adjust step-length and do a qualification, make RS not have influence on the uplink feature of BS when adjusting the up-link transmission power of its subordinate UT.
Above embodiment considers the double grading of RS as special UT and BS, BS at first determines its up-link transmission power by the residing network site of RS, determine the span of the road loss compensation factor that RS can use simultaneously and adjust step-length, reduce RS to interference that BS caused, improve the uplink throughput of RS itself, then, the information that RS determines according to BS is adjusted the up-link transmission power of self, determine the span and the adjustment step-length of the road loss compensation factor that the UT of subordinate can use simultaneously, reduce the interference of UT, improve the uplink throughput of UT RS and BS.By different road loss compensation factor preliminary adjustment value being set for different service quality (QoS) priority and adjusting step-length, under the prerequisite that satisfies the minimum quality of service demand at least, shorten the adjustment time of up-link power control, improve the validity of up-link power control.
Based on foregoing, according to a preferred embodiment of the invention, the method of a kind of road loss compensation factor setting and transmitting power correction is provided, and it descends by the availability of frequency spectrum when introducing transitional region and solve control of part power and path loss compensation in having the junction network of RS and load problem such as dispatching flexibility reduction when heavier.
Particularly, the method of this embodiment by in having the junction network of RS to cordless communication network in the layering of overlay area, in different layerings, rational road loss compensation factor is set, and up-link power control revised, this method comprises following processing:
Step 1, BS is provided with the first threshold of dividing internal layer area and transitional region, second threshold value of dividing transitional region and outer zone, and the road loss compensation factor and the running time-frequency resource of each zoning is set;
Step 2, the UT of sub-district measures high reject signal intensity, and measurement result is reported BS;
Step 3, BS determines zone under the UT according to measurement result, determines the road loss compensation factor of UT according to the UT affiliated area, calculates the transmitting power of UT, and result of calculation is sent to UT;
Step 4, UT receives result of calculation, and launches by result of calculation.
By said method, can under the prerequisite that reduces overhead effectively, shorten the required time of up-link power control, improve method, device and the network of the validity of up-link power control.
Further, the threshold value of mentioning in step 1 is to determine according to the interference signal intensity that arrives in the cell list strong jamming sub-district, generally comprise two threshold values, be respectively: internal layer＜=transition region, transition region＜=two threshold values such as skin, the zones of different in user's distinguishing cell.For example, Fig. 5 shows the hierarchy example of cordless communication network.
Wherein, internal layer be meant the interference signal intensity of strong jamming sub-district be lower than internal layer＜=zone of threshold value between the transition region, can think in this zone that presence of intercell interference intensity is very low even not have, can ignore the influence of presence of intercell interference.
Skin be meant the interference signal intensity of strong jamming sub-district be higher than transition region＜=zone of threshold value between the skin, this zone is the high zone of presence of intercell interference probability, the processing of presence of intercell interference must be carried out, otherwise throughput and the average UT throughput of cell edge UT can be influenced.
The interference signal intensity that transition region is meant strong jamming sub-district between internal layer＜=transition region and transition region＜=threshold value comprised between the skin zone, this zone is between internal layer and skin, high reject signal level is in the acceptable scope, but different with the sensitizing range among the LTE, main effect has two:
(1) this zone interference ratio skin is little, when UT is in this zone, can reach target transmit power by suitable adjustment road loss compensation factor, reduced because of improving the interference that transmitting power causes other UT and adjacent sub-district in the cell coverage area, increase the flexibility when path loss compensates simultaneously, effectively increased throughput and the average UT throughput of cell edge UT.
(2) this zone and internal layer and outer regional employed running time-frequency resource, be that Physical Resource Block (PRB) keeps quadrature, when internal layer or outer zone overweight or fully loaded when causing shared running time-frequency resource too much because of load, this regional running time-frequency resource can be used as effectively and replenishes, and has guaranteed the orthogonality of additional back resource simultaneously.
Region partitioning method according to above-mentioned cordless communication network, layering to overlay area in the cordless communication network, make BS dispatch the employed Physical Resource Block of UT (PRB) on frequency domain it is not used by the UT in the adjacent sub-district, the up-link transmission power of controlling different layers simultaneously carries out the coordination of presence of intercell interference and cell edge UT throughput and the average UT throughput in the raising cordless communication network under not having the prerequisite of bandwidth loss.
Comprising under the hierarchical network architecture of transition region, can the adjustment of road loss compensation factor under the different layerings and up-link power control be unified to handle by the mode that road loss compensation factor adjustment field is set, the complexity of reduction system, in having the network of RS, comprise the adjustment of BS and RS two aspects.Fig. 6 shows the setting of road loss compensation factor, respectively layerings different in the network is provided with different road loss compensation factors among Fig. 6, in the network for reality, can select different area configurations according to demand.
Fig. 8 (a) and Fig. 8 (b) are the realization flow figure according to road loss compensation factor of the present invention and up-link power control adjustment, wherein, Fig. 8 (a) is road loss compensation factor and a up-link power control adjustment implementation step among the BS, and Fig. 8 (b) is road loss compensation factor and a up-link power control adjustment implementation step among the RS.
The concrete implementation step of road loss compensation factor and up-link power control adjustment is as follows among the BS of Fig. 8 (a):
Step S801-1:BS determines the QoS priority sum of RS;
Step S802-1:BS determines the initial value and the adjustment step-length of the road loss compensation factor of different QoS priority;
Step S803-1:BS determines to judge whether there is hierarchy in the network, if there is hierarchy, jumps to step S804-1, otherwise jumps to step S805-1;
Step S804-1:BS determines the layered identification field of road loss compensation factor adjustment field;
Step S805-1:BS determines the value identification field of road loss compensation factor adjustment field;
Step S806-1:BS determines the initial value identification field of road loss compensation factor adjustment field according to the QoS priority of RS;
Step S807-1, BS determine the step-length identification field of road loss compensation factor adjustment field according to the QoS priority of RS;
Step S808-1, BS calculates the up-link transmission power of RS;
Step S809-1, BS determine the span of RS road loss compensation factor and adjust step-length;
Step S810-1, BS is by the up-link transmission power of uplink grant notice RS;
Step S811-1, BS is by the span and the adjustment step-length of uplink grant notice RS road loss compensation factor;
Step S812-1, the up-link transmission power that RS calculates according to BS is adjusted the up-link transmission power of self.
The concrete implementation step of road loss compensation factor and up-link power control adjustment is as follows among the RS of Fig. 8 (b):
Step S801-2:RS receives the up-link transmission power by the RS that is calculated by BS of uplink grant notice;
Step S802-2:RS receives span and the adjustment step-length by the definite RS road loss compensation factor of BS by the uplink grant notice;
Step S803-2:RS adjusts according to the up-link transmission power that BS calculates;
Step S804-2:RS determines the QoS priority sum of UT;
Step S805-2:RS determines the initial value and the adjustment step-length of the road loss compensation factor of different QoS priority;
Step S806-2:RS determines to judge whether there is hierarchy in the network, if there is hierarchy, jumps to step S807-2, otherwise jumps to step S808-2;
Step S807-2:RS determines the layered identification field of road loss compensation factor adjustment field;
Step S808-2:RS determines the value identification field of road loss compensation factor adjustment field;
Step S809-2:RS determines the initial value identification field of road loss compensation factor adjustment field according to the QoS priority of UT;
Step S810-2, RS determine the step-length identification field of road loss compensation factor adjustment field according to the QoS priority of UT;
Step S811-2, RS calculates the up-link transmission power of UT;
Step S812-2, the up-link transmission power that UT calculates according to RS is adjusted the up-link transmission power of self.
Above embodiment in different layerings by reasonably be provided with road loss compensation factor and up-link power control modification method, effectively reducing under the prerequisite of overhead, shorten the required time of up-link power control, improve the validity of up-link power control.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a road loss compensation factor setting method is characterized in that, comprising:
The path loss that the base station is measured according to relay station is determined the span of road loss compensation factor;
Based on the described span of determining, described base station is determined the initial value of described road loss compensation factor and is adjusted step-length according to the service quality priority of described relay station, and determines described road loss compensation factor adjustment field;
Described base station is adjusted field according to the initial value of the described road loss compensation factor of determining, described adjustment step-length and described road loss compensation factor and is determined road loss compensation factor, and calculates the up-link transmission power of relay station according to the described road loss compensation factor of determining;
The path loss that described base station is measured according to described relay station is determined the span of relay station road loss compensation factor and is adjusted step-length;
The span and the adjustment step-length of the described up-link transmission power and the described relay station road loss compensation factor of described relay station notified in described base station by uplink grant.
2. method according to claim 1 is characterized in that, also comprises:
Described relay station receives the span of described up-link transmission power and described relay station road loss compensation factor and adjusts step-length;
Described relay station is adjusted the up-link transmission power of user terminal according to described up-link transmission power;
Based on the span of described relay station road loss compensation factor, described relay station is determined the initial value of relay station road loss compensation factor and is adjusted step-length according to the service quality priority of described user terminal, and definite relay station road loss compensation factor is adjusted field;
The initial value of the described relay station road loss compensation factor that described relay station basis is determined and adjustment step-length and described relay station road loss compensation factor are adjusted field and are determined the relay station road loss compensation factor, and calculate the up-link transmission power of described user terminal according to the described relay station road loss compensation factor of determining;
Described relay station is notified the up-link transmission power of described user terminal by uplink grant.
3. method according to claim 1 and 2 is characterized in that, described road loss compensation factor is adjusted field and comprised:
Value identification field, initial value identification field, step-length identification field.
4. a road loss compensation factor setting method is characterized in that, comprising:
Relay station receives span and the adjustment step-length of base station by the up-link transmission power and the relay station road loss compensation factor of the relay station of uplink grant notice;
Described relay station is adjusted the up-link transmission power of user terminal according to described up-link transmission power;
Based on the span of described relay station road loss compensation factor, described relay station is determined the initial value of relay station road loss compensation factor and is adjusted step-length according to the service quality priority of described user terminal, and definite relay station road loss compensation factor is adjusted field;
The initial value of the described relay station road loss compensation factor that described relay station basis is determined and adjustment step-length and described relay station road loss compensation factor are adjusted field and are determined the relay station road loss compensation factor, and calculate the up-link transmission power of described user terminal according to the described relay station road loss compensation factor of determining;
Described relay station is notified the up-link transmission power of described user terminal by uplink grant.
5. method according to claim 4 is characterized in that, described road loss compensation factor is adjusted field and comprised:
Value identification field, initial value identification field, step-length identification field.
6. a road loss compensation factor setting method is characterized in that, comprising:
The Network Layering structure is determined according to the area dividing threshold value in the base station;
The path loss that described base station is measured according to relay station is determined the span of the road loss compensation factor of different layerings;
Based on the described span of determining, the initial value and the adjustment step-length of the described road loss compensation factor of different layerings are determined in described base station according to the service quality priority of described relay station, and determine described road loss compensation factor adjustment field;
The initial value of the described road loss compensation factor that described base station basis is determined and adjustment step-length and described road loss compensation factor are adjusted field and are determined road loss compensation factor, and calculate the up-link transmission power of described relay station according to the described road loss compensation factor of determining;
The path loss that described base station is measured according to described relay station is determined the span of relay station road loss compensation factor and is adjusted step-length;
The span and the adjustment step-length of the described up-link transmission power and the described relay station road loss compensation factor of described relay station notified in described base station by uplink grant.
7. method according to claim 6 is characterized in that, also comprises:
Described relay station receives the span of described up-link transmission power and described relay station road loss compensation factor and adjusts step-length;
Described relay station is determined the Network Layering structure according to the area dividing threshold value;
Described relay station is adjusted the up-link transmission power of user terminal according to described up-link transmission power;
Span based on described relay station road loss compensation factor, described relay station is determined the initial value and the adjustment step-length of the relay station road loss compensation factor of different layerings according to the service quality priority of described user terminal, and determines described relay station road loss compensation factor adjustment field;
Described relay station is according to the initial value and the adjustment step-length of the described relay station road loss compensation factor of the different layerings of determining, and described relay station road loss compensation factor adjusts field and determines the relay station road loss compensation factor, and calculates the up-link transmission power of described user terminal according to the described relay station road loss compensation factor of determining;
Described relay station is notified the up-link transmission power of described user terminal by uplink grant.
8. according to claim 6 or 7 described methods, it is characterized in that described road loss compensation factor is adjusted field and specifically comprised:
Layered identification field, value identification field, initial value identification field, step-length identification field.
9. according to claim 6 or 7 described methods, it is characterized in that described network hierarchy structure specifically comprises:
Internal layer, transition region and skin.
10. a road loss compensation factor setting method is characterized in that, comprising:
Relay station receives the span and the adjustment step-length of the up-link transmission power and the relay station road loss compensation factor of relay station;
Described relay station is determined the Network Layering structure according to the area dividing threshold value;
Described relay station is adjusted the up-link transmission power of user terminal according to described up-link transmission power;
Span based on described relay station road loss compensation factor, described relay station is determined the initial value and the adjustment step-length of the relay station road loss compensation factor of different layerings according to the service quality priority of described user terminal, and determines described relay station road loss compensation factor adjustment field;
Described relay station is according to the initial value and the adjustment step-length of the described relay station road loss compensation factor of the different layerings of determining, and described relay station road loss compensation factor adjusts field and determines the relay station road loss compensation factor, and calculates the up-link transmission power of described user terminal according to the described relay station road loss compensation factor of determining;
Described relay station is notified the up-link transmission power of described user terminal by uplink grant.
11. method according to claim 10 is characterized in that, described road loss compensation factor is adjusted field and is comprised:
Layered identification field, value identification field, initial value identification field, step-length identification field.
12. method according to claim 10 is characterized in that, described network hierarchy structure specifically comprises:
Internal layer, transition region and skin.
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| CN200810096199A CN101272173B (en) | 2008-05-09 | 2008-05-09 | Road loss compensation factor setting method |
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| CN200810096199A CN101272173B (en) | 2008-05-09 | 2008-05-09 | Road loss compensation factor setting method |
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| CN101272173A true CN101272173A (en) | 2008-09-24 |
| CN101272173B CN101272173B (en) | 2012-10-10 |
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| CN200810096199A Expired - Fee Related CN101272173B (en) | 2008-05-09 | 2008-05-09 | Road loss compensation factor setting method |
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