CN101754341A - Method for transmitting uplink power compensation information of cell coverage area layer - Google Patents
Method for transmitting uplink power compensation information of cell coverage area layer Download PDFInfo
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- CN101754341A CN101754341A CN200810186245A CN200810186245A CN101754341A CN 101754341 A CN101754341 A CN 101754341A CN 200810186245 A CN200810186245 A CN 200810186245A CN 200810186245 A CN200810186245 A CN 200810186245A CN 101754341 A CN101754341 A CN 101754341A
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Abstract
The invention provides a method for transmitting uplink power compensation information of a cell coverage area layer and comprises that uplink power loss compensation factor adjustment information of a UT is determined according to the layer of the UT in the cell coverage area when a base station (BS) is to control the uplink power of the user terminal (UT); and the uplink power loss compensation factor adjustment information is reported to the UT through one-time signaling. The invention has the advantages that, on the premise that the minimum service quality demand is satisfied at least and the system overhead is reduced, the time required by uplink power control is shortened, the effectiveness of the uplink power control is improved, the dynamic adjustment range of the uplink power loss compensation factor is increased because the uplink power loss compensation factor can be set to discrete values and continuous values, and the uplink transmission power can be fine adjusted.
Description
Technical field
The present invention relates to the cordless communication network Poewr control method, relate in particular to the method for the up-link power control of cell coverage area layer.
Background technology
In follow-on broadband wireless communication network, solve presence of intercell interference in the cordless communication network, become a key factor that improves inter-cell user terminal (UT, User Terminal) throughput and average UT throughput, and be faced with formidable challenges.
At present, in IEEE 802.16j, wireless air interface key technology IMT-Advanced, WINNER (Wireless world Initiative New Radio), all propose to adopt methods such as interference randomization, interference coordination, interference eliminated to solve the problem of presence of intercell interference.Long Term Evolution (LTE, Long TermEvolution) proposes in the works,, cell coverage area is divided into internal layer and skin according to the strong jamming level of user terminal (UT) to all neighbor cells, as shown in Figure 1, and adopt 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, and the UT in promptly should the zone almost can ignore to the strong jamming level of all neighbor cells, so adopt total power compensation (or claiming system-wide to decrease compensation); And outer zone for having presence of intercell interference, the UT in promptly should the zone is very big to the strong jamming level of a certain neighbor cell, so adopt the method for part power control (or title part path loss compensates) to solve the problem of presence of intercell interference.
LTE adopts the power control and the path loss compensation method of layering, can make the signal of neighbor cell disturb reduction effectively mutually by to being in the reasonable adjustment of the regional UT up-link power road loss compensation factor of skin.
In the power control and path loss compensation method that layering is carried out, the indication information of road loss compensation factor (0≤α≤1) is at base station (BS, Base Station) is notified to user terminal UT's by uplink grant, this indication information comprises the span of α, the initial value of α and the compensation step value of α etc., and UT calculates the signal transmission power of its up link according to available this indication information.
And propose to adopt the method for the control of part power and the path loss compensation of layering among the LTE, the road loss compensation factor unification is set to the subclass of a 3-bit, does not provide the method how road loss compensation factor of 3-bit subclass effectively uses; So to the notice of above-mentioned indication information, may need between base station and the UT situation of a plurality of Signalling exchanges back and forth, thus the time lengthening that makes up-link power control.
In addition, because the control of outer employing part power is to be radiated the neighbor cell generation for fear of same signal frequency to disturb mutually, can cause the outer availability of frequency spectrum to descend thus.Have again, adopt the method for the control of part power and the path loss compensation of layering, because the orthogonality of internal layer and outer running time-frequency resource, when internal layer or outer overweight or full load can't obtain running time-frequency resource mutually and effectively replenishes because of load, can't the flexible dispatching running time-frequency resource when promptly internal layer or outer load are heavier.
Summary of the invention
Technical problem to be solved by this invention provides a kind of transmission method of uplink power compensation information of cell coverage area layer, can be under the prerequisite that reduces overhead, shorten the required time of up-link power control, thereby improve the validity of up-link power control.
In order to solve the problems of the technologies described above, the invention provides a kind of transmission method of uplink power compensation information of cell coverage area layer, comprise: base station BS is in the time will controlling the up-link power of user terminal UT, in the residing layering of cell coverage area, determine the road loss compensation factor adjustment information of UT according to UT; Then, give UT with this road loss compensation factor adjustment information by a signaling.
Further, cell coverage area layer comprises internal layer and skin at least.
Further, cell coverage area layer also comprises the transition zone between internal layer and skin.
Further, the road loss compensation factor adjustment information comprises the span identification field at least, is used for BS determines and identify road loss compensation factor according to the residing layering of UT span.
Further, the road loss compensation factor adjustment information also comprises initial value identification field and step-length identification field, and the initial value identification field is used for BS determines and identify road loss compensation factor according to the service quality QoS priority of UT initial value; The step-length identification field is used for BS determines and identify road loss compensation factor according to QoS priority adjustment step value.
Further, the road loss compensation factor adjustment information comprises initial value identification field and step-length identification field at least, and the initial value identification field is used for described BS determines and identify road loss compensation factor according to the service quality QoS priority of UT initial value; The step-length identification field is used for described BS determines and identify road loss compensation factor according to QoS priority adjustment step value.
Further, the road loss compensation factor adjustment information also comprises the span identification field, is used for BS determines and identify road loss compensation factor according to the residing layering of UT span.
Further, the value in the span of road loss compensation factor is the centrifugal pump between 0～1, and perhaps, the value in the span of road loss compensation factor is the successive value between 0～1.
Further, the initial value of road loss compensation factor is more than or equal to 0, and adjusting step value accordingly is positive number; Perhaps, the initial value of road loss compensation factor is smaller or equal to 1, and adjusting step value accordingly is negative.
Further, described method also comprises: UT carries out the signal emission and the power adjustment of up link according to the road loss compensation factor adjustment information of BS notice.
Adopt method provided by the invention, can shorten the required time of up-link power control, improve the validity of up-link power control satisfying the minimum quality of service demand at least and reducing under the prerequisite of overhead.Because 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.
By overlay area in the cordless communication network is divided into internal layer, transition zone and skin, further refinement cell coverage area solves effectively in the part power control of adopting layering and path loss compensation process that the inside and outside layer availability of frequency spectrum descends and load problem such as dispatching flexibility reduction when heavier.
Description of drawings
Fig. 1 is the structural representation of LTE to cell coverage area layer;
Fig. 2 is the hierarchy schematic diagram of the present invention to cell coverage area;
Fig. 3 is provided with schematic diagram for the road loss compensation factor at cell coverage area layer of the present invention;
Fig. 4 is the structure chart of road loss compensation factor adjustment information of the present invention;
Fig. 5 is the realization flow figure of road loss compensation factor of the present invention and up-link power control adjustment.
Embodiment
The transmission method of the uplink power compensation information of cell coverage area layer provided by the invention, its core main points are, base station BS is according to the layering of user terminal UT cell coverage area of living in, determine the span of road loss compensation factor adjustment information, and determine the initial value of road loss compensation factor adjustment information and adjust step value according to the service quality priority of UT; Then, by single uplink grant notice the road loss compensation factor adjustment information is indicated to UT.
Below in conjunction with the drawings and specific embodiments technique scheme of the present invention is illustrated in greater detail and explains.
Embodiment 1
The transmission method of the uplink power compensation information of cell coverage area layer provided by the invention is revised up-link power control by road loss compensation factor reasonably is set in different layerings, and this method comprises:
Step 1: base station BS in the residing layering of cell coverage area, is determined the span of its road loss compensation factor adjustment information according to UT in the time will controlling the up-link power of user terminal UT;
Because the span of road loss compensation factor is between 0～1, wherein, 0 representative is not carried out the path loss compensation to the up-link power of UT, 1 representative is carried out system-wide to the up-link power of the UT that is in internal layer and is decreased compensation, less than 1 representative the up-link power that is in outer field UT is carried out the compensation of part path loss greater than 0.Therefore, BS determines the span of road loss compensation factor, in fact is exactly the type (system-wide is decreased compensation or the compensation of part path loss) that determines whether to select in up link the path loss compensation.
Notice that the value of road loss compensation factor can be quantized or successive value herein, centrifugal pump is similar to the subclass (3-bit) that is provided with among the LTE; And successive value can be between 0～the 1 or any successive value in the road loss compensation factor span determined of BS, this successive value the dynamic adjusting range that has increased road loss compensation factor is set, help meticulous adjustment up-link transmission power.
Step 2:BS continues the service quality QoS priority according to UT, determines the initial value of road loss compensation factor adjustment information and adjusts step-length;
The QoS priority of UT has been represented different quality of service requirements, has also represented the minimum quality of service demand of the UT of affiliated QoS priority.In the present invention, by different road loss compensation factor initial values being set for different QoS priority and adjusting step value.For example, when the QoS of UT priority is higher, the road loss compensation factor initial value correspondingly is provided with higher, and when its span is little, will adjusts step value and correspondingly be provided with less.Again for example, when the QoS of UT priority is higher, the road loss compensation factor initial value correspondingly is provided with higher, and when its span is big, will adjusts step value and correspondingly be provided with bigger.Again for example, when the QoS of UT priority is low, the road loss compensation factor initial value correspondingly is provided with lower, and hour in its span, will adjust step value correspondingly be provided with less, or the like.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.
Notice that the initial value of the road loss compensation factor of different QoS priority can approach 1, also can approach 0, so corresponding adjustment step-length can be on the occasion of also can being negative value; Promptly for the UT of different QoS priority, the uplink transmission power adjustment process can be to adjust toward big from little, also can be from big past little adjustment, has increased the flexibility that the control of road loss compensation factor and up-link power is adjusted thus.
Certainly, if all QoS priority of UT are all used the initial value of same road loss compensation factor and adjusted step value, then BS just needn't indicate initial value and adjust step value, and then UT can and adjust step value and carry out path loss and compensate according to the initial value of system default.
Step 3:BS is by the road loss compensation factor adjustment information of its up-link power of uplink grant notice indication UT;
At this, BS can calculate the UT up-link transmission power according to the road loss compensation factor adjustment information, and this transmitting power that will calculate and road loss compensation factor adjustment information are indicated together to UT.Perhaps, BS only indicates the road loss compensation factor adjustment information to UT, and has UT oneself to go out its up-link transmission power according to this information calculations.
Step 4:UT carries out the emission and the power adjustment of uplink signal according to the adjustment information of the road loss compensation factor of the up-link power of BS indication.
At this, if BS just indicates the road loss compensation factor adjustment information to UT, then UT goes out its up-link transmission power according to this information calculations, and carries out uplink signal emission and power adjustment according to this transmitting power and road loss compensation factor adjustment information.
Said method of the present invention can shorten the required time of up-link power control under the prerequisite that reduces overhead effectively, improve the validity of up-link power control.
Embodiment 2
The present invention is directed to the hierarchy of the radio communication network cell overlay area being introduced transition zone between internal layer and skin, as shown in Figure 2, provide the transmission method of the uplink power compensation information of cell coverage area layer, the availability of frequency spectrum when solve adopting control of layered portion power and path loss compensation effectively descends and load problem such as dispatching flexibility reduction when heavier; This method comprises:
Step 1, base station BS according to the interference signal intensity of the strong jamming sub-district of UT, are determined UT in the residing layering of cell coverage area in the time will controlling the up-link power of user terminal UT, comprise any one deck in internal layer, transition zone and the skin;
Internal layer is meant that the interference signal intensity of strong jamming sub-district is lower than the zone of threshold value between internal layer and the transition zone, can think in this zone that presence of intercell interference intensity is very low even does not have, and can ignore the influence of presence of intercell interference.
Outer, be meant that the interference signal intensity of strong jamming sub-district is higher than the zone of threshold value between transition region and 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 the throughput and average user terminal (UT) throughput of Cell Edge User terminal (UT) can be influenced.
Transition zone, the interference signal intensity that is meant strong jamming sub-district is between threshold value comprised between threshold value and transition region and the skin between internal layer and the transition region zone, this regional interference signal intensity is between internal layer and skin, and high reject signal level is in the acceptable scope; This transition zone mainly acts on as follows:
(1) this transition zone interference ratio skin is little, when UT is in this transition zone, can by suitably adjust road loss compensation factor (be road loss compensation factor be lower than internal layer, be higher than outer field road loss compensation factor) reach target transmit power and (should ensure signal quality, also to effectively reduce mutually and disturb), reduced because of improving the interference that transmitting power causes other UT and neighbor cell in the cell coverage area, increased the flexibility of path loss compensation simultaneously, and can receive more UT effectively, thereby throughput and the average UT throughput of cell edge UT have been increased effectively.
(2) the employed running time-frequency resource of this transition zone, be Physical Resource Block (PRB, Physical ResourceBlock) keeps quadrature with internal layer and skin respectively, when internal layer or outer because of load overweight or fully loaded when causing shared running time-frequency resource too much, the running time-frequency resource of this transition zone effectively can be replenished as internal layer or outer running time-frequency resource, still guarantee internal layer or outer orthogonality of replenishing the back running time-frequency resource simultaneously.
This layering to cell coverage area in the cordless communication network, when making the base station on frequency domain, dispatch the employed Physical Resource Block PRB of UT, do not used by the UT in the neighbor cell, the up-link transmission power of controlling different layers simultaneously carries out the coordination of presence of intercell interference, and improves cell edge UT throughput and average UT throughput in the cordless communication network under not having the prerequisite of bandwidth loss.
Step 2:BS in the residing layering of cell coverage area, determines corresponding road loss compensation factor adjustment information, as shown in Figure 3 according to UT;
Road loss compensation factor adjustment information field comprises as shown in Figure 4: span identification field, initial value identification field and step-length identification field.
Owing under the different layerings, consider factors such as Inter-Cell Interference Coordination, road loss compensation factor can be different, and therefore, BS will determine the span of the road loss compensation factor in the different layerings, and it is identified at the span identification field; Simultaneously, determine the initial value and the adjustment step-length of the road loss compensation factor of different layerings, and it is identified at initial value identification field and step-length identification field respectively according to the QoS priority of UT.
For example above-mentioned in this embodiment three each fields of field identify with 2-bit altogether.
Notice that road loss compensation factor is adjusted three parts of field, can be according to the demand of network, suitable adjustment.For example, 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 span identification field, can further reduce the expense of system like this in network.
Step 3:BS is by the road loss compensation factor adjustment information field of its up-link power of single uplink grant notice indication UT;
At this, BS can calculate the UT up-link transmission power according to the road loss compensation factor adjustment information, and this transmitting power that will calculate and road loss compensation factor adjustment information field are indicated together to UT.Perhaps, BS only indicates road loss compensation factor adjustment information field to UT, and has UT oneself to go out its up-link transmission power according to the information calculations in this information field.
Step 4:UT carries out the emission and the power adjustment of uplink signal according to the information of the adjustment information field of the road loss compensation factor of the up-link power of BS indication.
At this, if BS just indicates road loss compensation factor adjustment information field to UT, then UT basis information calculations wherein goes out its up-link transmission power, and carries out uplink signal emission and power adjustment according to this transmitting power and road loss compensation factor adjustment information.
Fig. 5 is the realization flow figure of the foregoing description, and concrete implementation step is as follows:
S101: base station BS is determined the QoS priority sum of user terminal UT;
S102:BS determines the initial value identification field and the step-length identification field of the road loss compensation factor adjustment information of different QoS priority;
S103:BS judges in the network whether layering of cell coverage area, if carry out S104, otherwise jumps to S105;
S104:BS determines the value identification field of the road loss compensation factor adjustment information of different layerings;
S105:BS calculates the up-link transmission power of UT according to the road loss compensation factor adjustment information;
S107:BS is by the up-link transmission power of uplink grant notice UT, and indication road loss compensation factor adjustment information;
The up-link transmission power that S108:UT adjusts self according to the up-link transmission power and the road loss compensation factor adjustment information of BS notice, process ends.
Method of the present invention compared with prior art, in different layerings, up-link power control is revised by road loss compensation factor reasonably is set, effectively reducing under the prerequisite of overhead, shorten the required time of up-link power control, improve the validity of up-link power control.
By 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, the complexity of reduction system is controlled the expense that reduces system in the adjustment process effectively at road loss compensation factor and up-link power.
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.
By different road loss compensation factor preliminary adjustment value being set for different 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.
Though the present invention discloses with aforesaid preferred embodiment, be not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention, the modification of being done all is included in the application's the scope.
Claims (10)
1. the transmission method of the uplink power compensation information of a cell coverage area layer, comprise: base station BS is in the time will controlling the up-link power of user terminal UT, in the residing layering of cell coverage area, determine the road loss compensation factor adjustment information of described UT according to described UT; Then, give described UT with described road loss compensation factor adjustment information by a signaling.
2. in accordance with the method for claim 1, it is characterized in that described cell coverage area layer comprises internal layer and skin at least.
3. in accordance with the method for claim 2, it is characterized in that described cell coverage area layer also comprises the transition zone between described internal layer and described skin.
4. in accordance with the method for claim 1, it is characterized in that described road loss compensation factor adjustment information comprises the span identification field at least, be used for described BS determines and identify described road loss compensation factor according to the residing layering of described UT span.
5. in accordance with the method for claim 4, it is characterized in that, described road loss compensation factor adjustment information also comprises initial value identification field and step-length identification field, and described initial value identification field is used for described BS determines and identify described road loss compensation factor according to the service quality QoS priority of described UT initial value; Described step-length identification field is used for described BS determines and identify described road loss compensation factor according to described QoS priority adjustment step value.
6. in accordance with the method for claim 1, it is characterized in that, described road loss compensation factor adjustment information comprises initial value identification field and step-length identification field at least, and described initial value identification field is used for described BS determines and identify described road loss compensation factor according to the service quality QoS priority of described UT initial value; Described step-length identification field is used for described BS determines and identify described road loss compensation factor according to described QoS priority adjustment step value.
7. in accordance with the method for claim 6, it is characterized in that described road loss compensation factor adjustment information also comprises the span identification field, be used for described BS determines and identify described road loss compensation factor according to the residing layering of described UT span.
8. according to claim 4 or 7 described methods, it is characterized in that the value in the span of described road loss compensation factor is the centrifugal pump between 0～1, perhaps, the value in the span of described road loss compensation factor is the successive value between 0～1.
9. according to claim 5 or 6 described methods, it is characterized in that the initial value of described road loss compensation factor is more than or equal to 0, corresponding described adjustment step value is a positive number; Perhaps, the initial value of described road loss compensation factor is smaller or equal to 1, and corresponding described adjustment step value is a negative.
10. in accordance with the method for claim 1, it is characterized in that described method also comprises: described UT carries out the signal emission and the power adjustment of up link according to the described road loss compensation factor adjustment information of described BS notice.
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| CN200810186245A CN101754341A (en) | 2008-12-22 | 2008-12-22 | Method for transmitting uplink power compensation information of cell coverage area layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298091A (en) * | 2012-03-01 | 2013-09-11 | 中兴通讯股份有限公司 | Upstream transmitting power determining method and device |
| CN114143865A (en) * | 2020-09-04 | 2022-03-04 | 大唐移动通信设备有限公司 | Random access method, terminal and network side equipment |
-
2008
- 2008-12-22 CN CN200810186245A patent/CN101754341A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298091A (en) * | 2012-03-01 | 2013-09-11 | 中兴通讯股份有限公司 | Upstream transmitting power determining method and device |
| CN114143865A (en) * | 2020-09-04 | 2022-03-04 | 大唐移动通信设备有限公司 | Random access method, terminal and network side equipment |
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Application publication date: 20100623 |