CN102104873A - Co-channel networking method and base station - Google Patents
Co-channel networking method and base station Download PDFInfo
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Abstract
The invention discloses a co-channel networking method and a base station. The method comprises the step of preferentially allocating downlink control channels of any two adjacent cells in all the cells, which utilize the same frequency point bearer service, in different time slots. By applying the invention, the downlink control channels of two adjacent cells which utilize the same frequency point bearer service are allocated in different time slots, thus downlink co-channel interference among adjacent cells can be effectively controlled and the communication capability of a terminal can be improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of inter-frequency networking method and base station of mobile communication system.
Background technology
Insert (Time Division-Synchronous Code DivisionMultiple Access in TD SDMA, abbreviate TD-SCDMA as) in the system, the main N frequency point co-frequency network's mode that adopts communicates, utilize this networking mode, Wideband Code Division Multiple Access (WCDMA) in 3G (Third Generation) Moblie inserts (Wide Code Division Multiple Access, abbreviate WCDMA as) system and CDMA2000 (Code Division Multiple Access2000), the TD-SCDMA system can obtain the higher availability of frequency spectrum.
Dominant frequency based on carrying common signal channel in the TD-SCDMA network cell of N frequency is taked the mode of alien frequencies beehive net, and this mode can reduce the co-channel interference of common signal channel between the adjacent area effectively.In the specific implementation process, when terminal sends upward signal to the base station, because the disposal ability of network side is stronger, even there is co-channel interference in up direction, the Radio Network System of TD-SCDMA (Radio Network System, abbreviate RNS as) can adopt the multi-plot joint detection technique that terminal is detected to the upward signal that the base station sends, can effectively eliminate the co-channel interference of neighboring interval reverse link traffic channel like this, RNS comprises radio network controller (Radio Network Controller abbreviates RNC as) and base station (NodeB); But the base station is when the downstream signal of terminal, because the disposal ability of terminal is limited, and be subjected to the restriction of algorithm implementation complexity, can't effectively eliminate the co-channel interference (being descending co-channel interference) of adjacent minizone downlink traffic channel, descending co-channel interference refers to that mainly this cell terminal is subjected to adjacent sub-district and is disturbing with the signal of frequency with descending time slot.
Fig. 1 is the schematic diagram of co-channel interference between neighbor cell, as shown in Figure 1, comprises base station, sub-district A, sub-district B, the terminal b that belongs to the terminal a of sub-district A and belong to sub-district B.Because the effect of intelligent antenna beam shaping, the downstream signal of the terminal in this sub-district generally can not produce the terminal of adjacent area and disturb, descending co-channel interference mainly is present in the switch area of minizone intersection and adheres to separately between the terminal of adjacent different districts, the base station of sub-district A is also had part signal for the signal of terminal a and is transmitted into the interior terminal b of its adjacent sub-district B last (dotted line is represented) in the time of (solid line is represented), bring descending interference will for like this terminal b, in like manner, the base station of sub-district B is also had part signal for the signal of terminal b and is transmitted into the interior terminal a of its adjacent sub-district A last (dotted line is represented) in the time of (solid line is represented), bring descending interference so also can for terminal a.In actual commercial network, the TD-SCDMA system can be by RRM (the Radio Resource Manage of RNS, abbreviating RRM as) resource adjustment such as algorithm frequency that terminal is used, time slot evade co-channel interference, but be in higher load at the TD-SCDMA network, do not have idling-resource for RRM when allotment, co-frequency co-time slot on the downlink traffic channel disturbs will be inevitable, at this moment will reduce the communication service quality of terminal greatly, reduce user's experience.
As can be seen, the problem that causes communication service quality to descend for the co-channel interference that how to solve adjacent minizone downlink traffic channel in the prior art does not propose effective solution at present as yet.
Summary of the invention
At the problem that causes communication service quality to descend for the co-channel interference that how to solve adjacent minizone downlink traffic channel in the correlation technique, the present invention proposes a kind of inter-frequency networking method, can effectively control the descending co-channel interference between neighbor cell.
At the problem that causes communication service quality to descend for the co-channel interference that how to solve adjacent minizone downlink traffic channel in the correlation technique, the present invention also proposes a kind of base station, can effectively control the descending co-channel interference between neighbor cell.
Technical scheme of the present invention is achieved in that
A kind of inter-frequency networking method comprises:
For any two neighbor cells in all sub-districts that utilize same frequency bearer service, preferentially the down control channel with these two neighbor cells is configured on the different time slots.
Wherein, said method also comprises:
If the down control channel of any two neighbor cells in all sub-districts all can't be configured on the different time slots, all descending co-channel interference values between neighbor cell in twos relatively then;
According to the quantity of all sub-districts and the quantity of all time slots, determine that down control channel is configured in the quantity of the neighbor cell on the different time slots, wherein, preferentially the down control channel of the part or all of neighbor cell that descending co-channel interference value is big in described all sub-districts is configured on the different time slots.
Wherein, said method also comprises:
Determine descending co-channel interference value between any two neighbor cells by network disturbed test result on the spot;
Wherein, the disturbed test on the spot of described network is a same frequency switch test professional between two neighbor cells, and then described network disturbed test result on the spot is the success rate of the same frequency switch test of business between two neighbor cells.
Wherein, said method also comprises:
Each down control channel for each sub-district in all sub-districts, the difference of the normalization solid size road power of the downstream data channel of the normalization solid size road power maximum of described down control channel and this sub-district is arranged in the predetermined threshold value scope, makes the signal of described down control channel satisfy demodulation threshold.
Wherein, the signal of described down control channel satisfies demodulation threshold and is meant:
The signal to noise ratio of the signal of described down control channel is greater than or equal to default signal-noise ratio threshold; Perhaps,
The error rate of the signal of described down control channel is less than or equal to default error rate thresholding.
Wherein, said method also comprises:
For each sub-district in all sub-districts, the down control channel and the downstream data channel of described sub-district is disposed on the different time slots.
Preferably, it is one of following that described down control channel comprises: following special physical channel, share down control channel, absolute grant channel, the automatic retransfer indication channel of mixing, described downstream data channel is the downlink physical shared channel.
A kind of base station comprises:
Configuration module is used for any two neighbor cells to all sub-districts that utilize same frequency bearer service, and preferentially the down control channel with these two neighbor cells is configured on the different time slots.
Preferably, above-mentioned base station also comprises:
Control module, be used for each down control channel to all each sub-districts, sub-district, in the predetermined threshold value scope, make the signal of described down control channel satisfy demodulation threshold the difference of the normalization solid size road power of the downstream data channel of the normalization solid size road power maximum of described down control channel and this sub-district.
Wherein, configuration module, also be used for each down control channel to all each sub-districts, sub-district, the difference of the normalization solid size road power of the data channel of the normalization solid size road power maximum of described down control channel and this sub-district is arranged in the predetermined threshold value scope, makes the signal of described down control channel satisfy demodulation threshold.
By means of technique scheme of the present invention, the down control channel of two neighbor cells by will utilizing same frequency bearer service is configured on the different time slots, the descending co-channel interference between neighbor cell be can effectively control, the communication service quality of terminal and the quality of service of whole network improved.
Description of drawings
Fig. 1 is the schematic diagram of descending co-channel interference between neighbor cell;
Fig. 2 is the flow chart according to the inter-frequency networking method of the embodiment of the invention;
Fig. 3 is the schematic diagram according to the beehive net of the embodiment of the invention;
Fig. 4 is the composition structure connection layout according to the base station of the embodiment of the invention.
Embodiment
For clear the present invention described, below with the high-speed data of TD-SCDMA insert (High SpeedPacket Access abbreviates HSPA as) professional for example to present TD-SCDMA the identical networking mode describe.
Along with the TD-SCDMA system evolves to the R7 version by the R4 version, the business of TD-SCDMA system is at circuit switching (Circuit Switch, abbreviate CS as) professional and exchanges data (Packet Switch, abbreviate PS as) on the professional basis, the high-speed down data that has increased based on the R5 version inserts (HighSpeed Downlink Packet Access, abbreviate HSDPA as) business, high speed uplink data based on the R6 version insert (High Speed Uplink Packet Access, abbreviate HSUPA as) professional and based on the HSPA business of R7 version, wherein, HSPA is the business that HSDPA is professional and the HSUPA business combines.
In the HSPA business, 9 kinds of new physical channels have been introduced: Physical Shared Channel (HSDPA-Physical Downlink Shared Channel abbreviates HS-PDSCH as), the downlink physical shared channel of HSDPA, be used to carry data, this channel transmitting power is a fixed value; Shared control channel (HSDPA-Shared Control Channel abbreviates HS-SCCH as), the shared control channel of HSDPA is used for the base station scheduling terminal and receives HS-PDSCH, and this channel is a down channel; Share information channel (HSDPA-Shared Information Channel, abbreviate HS-SICH as), the shared information channel of HSDPA, terminal utilize reception condition, the channel quality indication of the descending HS-PDSCH of this channel feedback and the modulation system of recommending, and this channel is a up channel; Uplink physical channel (Physical Uplink Channel abbreviates E-PUCH as), the uplink physical channel of E-DCH, be used to carry data, this channel is divided into scheduling and two types of non-scheduling, and wherein, E-DCH is enhancement type special channel (Enhanced-DedicatedChannel); Ascending control channel (E-DCH Uplink Control Channel abbreviates E-UCCH as), the ascending control channel of E-DCH, with the E-PUCH assembled package on identical physical code channel, this channel is a up channel; Absolute grant channel (E-DCH-Absolute Grant Channel abbreviates E-AGCH as), the absolute grant channel of E-DCH is used for the base station scheduling terminal and sends E-PUCH and E-UCCH, and this channel is a down channel; Mix automatic retransfer indication channel (E-DCH-HybridARQ Acknowledgement Indicator Channel, abbreviate E-HICH as), the automatic retransfer indication channel of the mixing of E-DCH, the base station utilizes the reception condition of this channel to terminal feeding back uplink E-PUCH, this channel is a down channel, is divided into two types of scheduling and non-scheduling; Uplink random access control channel (E-DCH-Random Access Uplink Control Channel, abbreviate E-RUCCH as), the uplink random access control channel of E-DCH, in the time need sending data when terminal but not obtain base station scheduling, terminal can utilize this channel to the meeting of base station application dispatcher; Following special physical channel (Accompany-Dedicated Physical Channel, abbreviate A-DPCH as), be used to transmit high-rise control signaling (for example hand off signaling), this channel is divided into up A-DPCH and descending A-DPCH, and occur in pairs, terminal can be distributed to A-DPCH in the base station after terminal is initiated the HSPA business, the DPCH that CS and PS use in up-downgoing A-DPCH and the R4 version is similar, here with the A-DPCH of HSPA and the unified DPCH that is called of DPCH of R4 version.
Because the above-mentioned R4 of TD-SCDMA network support, business such as HSDPA, HSPA, consider the evolution situation of present RNS and terminal and operator demand to network, the HSUPA business can not occur in commercialization separately.Table 1 is that the ratio of uplink and downlink timeslot in the commercial network is 3: 3, the Typical Disposition signal table of the channel of HSPA business on dominant frequency point.
Table 1
In table 1, the channel that TS1, TS4 are carried is referred to as control channel, and the channel that TS2, TS3, TS5, TS6 are carried is referred to as data channel, and the blank code channel on TS1 and the TS3 can be used for carrying DPCH.
Identical networking all can be carried out according to the Traffic Channel to HSPA on same frequency of the channel time slot configuration mode shown in the table 1 in each sub-district, for up co-channel interference, because having multi-plot joint, RNS detects the function of eliminating uplink interference, and NodeB can effectively suppress uplink interference by rational scheduling and power mandate, but for descending co-channel interference, owing to the limitation of terminal processing capacity, can't effectively eliminate the co-channel interference of adjacent minizone downlink traffic channel.
In order to solve the descending problem of co-channel interference in the HSPA identical networking, the present invention is according to the effect of various physical channels among the HSPA, and in conjunction with the characteristics of each channel service operation in the TD-SCDMA network, a kind of TD-SCDMA identical networking scheme based on the HSPA business is proposed, in the present invention, main down control channel and the downstream data channel that takies with HSPA is that example describes, the down control channel and the downstream data channel that take for other business, can similarly handle, give an example no longer one by one here.
Fig. 2 is the flow chart of steps of the inter-frequency networking method of the embodiment of the invention, as shown in Figure 2, comprises following processing:
Step S201, for any two neighbor cells in all sub-districts that utilize same frequency bearer service, preferentially the down control channel with these two neighbor cells is configured on the different time slots, and, for each sub-district in all sub-districts, the down control channel and the downstream data channel of sub-district is disposed on the different time slots.
Step S202, if the down control channel of any two neighbor cells in all sub-districts all can't be configured on the different time slots, all descending co-channel interference values between neighbor cell in twos relatively then; According to the quantity of all sub-districts and the quantity of all time slots, determine that down control channel is configured in the quantity of the neighbor cell on the different time slots, wherein, preferentially the down control channel of the part or all of neighbor cell that descending co-channel interference value is big in all sub-districts is configured on the different time slots.
In the channel configuration process, for each sub-district, the down control channel of this sub-district can be configured on the different time slots with downstream data channel, and all down control channels (for example DPCH, HS-SCCH, E-AGCH, E-HICH) of this sub-district all are configured on the identical time slot, for example, all down control channels (for example DPCH, HS-SCCH, E-AGCH, E-HICH) of sub-district A all are configured on the TS4 time slot, and the downstream data channel of sub-district A is configured on the TS6 time slot.Among the present invention,, the down control channel of neighbor cell is configured on the different time slots, that is,, the down control channel of neighbor cell is configured on the different time-gap according to the neighboring BS relationship of sub-district for the communication quality of the down control channel that guarantees neighbor cell.Fig. 3 is the schematic diagram of beehive net, as shown in Figure 3, comprise 7 sub-districts, and have at most three sub-districts can be in twos adjacent area each other, sub-district A, sub-district B, the adjacent each other sub-district of sub-district C, with these three sub-districts is example: sub-district A, sub-district B, sub-district C is configuration HSPA Traffic Channel (being the HSPA identical networking) on same frequency, if the down control channel of sub-district A is configured on the TS4 time slot, the down control channel of sub-district B just should be configured on other descending time slots except that the TS4 time slot so, for example TS5 time slot or TS6 time slot, if the down control channel of sub-district B is configured on the TS5 time slot, the down control channel of sub-district C just should be configured on the TS6 so, the equipping rules of the down control channel place time slot of the sub-district that other are adjacent in twos is identical therewith, repeats no more here.
Owing to also can occur four sub-districts adjacent area or more sub-districts situation of adjacent area each other in twos each other in twos in the real network, the down control channel that so just is difficult to guarantee adjacent in twos sub-district all is configured in the principle in the different time-gap, two sub-districts or the identical situation of multi-cell downlink control channel place time slot more can appear, for this situation, can preferentially will disturb the down control channel of two big neighbor cells to be configured on the different time slots with descending time slot, and will disturb the down control channel of two little neighbor cells to be configured on the identical time slot with frequency.In implementation procedure, can obtain the size of disturbing with descending time slot frequently together between neighbor cell by network disturbed test on the spot, for example, can estimate with frequency success rate for switching index according to minizone HSPA is professional, the low more explanation of success rate is disturbed big more, and the high more explanation of success rate is disturbed more little.Be configured by such rule, can optimize network, generally speaking, if the switch area of neighbor cell is feeble field and circumstance complication, the interference meeting that is brought during switching is bigger.
In implementation procedure, can also be configured with reference to the dominant frequency point of each sub-district, the network of N=3 frequency for example, network comprises three frequencies, be respectively F1, F2, F3, the dominant frequency of neighbor cell is normally carried out the alien frequencies beehive net based on F1, F2, these three frequencies of F3, so that the phase mutual interference minimum of neighbor cell dominant frequency point TS0 common down channel.Suppose that HSPA is configured on the F3, can set such corresponding relation, with dominant frequency is that the down control channel of the sub-district of F1 is configured in the TS4 time slot, is that the down control channel of the sub-district of F2 is configured in the TS5 time slot with dominant frequency, is that the down control channel of the sub-district of F3 is configured in the TS6 time slot with dominant frequency.Like this, when networking, as long as the dominant frequency point of good each sub-district of the network planning, the down channel time slot configuration of the identical HSPA frequency in corresponding each sub-district has also just been determined.
In the channel configuration process, each down control channel for each sub-district in all sub-districts, the difference of the normalization solid size road power of the downstream data channel of the normalization solid size road power maximum of down control channel and this sub-district is arranged in the predetermined threshold value scope, make the signal of down control channel satisfy demodulation threshold, wherein, the signal of down control channel satisfies demodulation threshold and is meant: the signal to noise ratio of the signal of down control channel is greater than or equal to default signal-noise ratio threshold; Perhaps, the error rate of the signal of down control channel is less than or equal to default error rate thresholding.
For example, the normalization solid size road power maximum P of the descending DPCH of sub-district
MAX_DL-DPCH, HS-SCCH normalization solid size road power maximum P
MAX_HS-SCCH, the normalization solid size road power maximum P of E-AGCH
MAX_E-AGCH, the solid size road power maximum P of E-HICH
MAX_E-HICH, the normalization solid size road power P of HS-PDSCH
HS-PDSCH, for each down control channel, the restriction relation between this down control channel and the downstream data channel is set, shown in the following formula:
P
MAX_DL-DPCH＝P
HS-PDSCH+d
1 (1)
P
MAX_HS-SCCH＝P
HS-PDSCH+d
2 (2)
P
MAX_E-AGCH＝P
HS-PDSCH+d
3 (3)
P
MAX_E-HICH＝P
HS-PDSCH+d
4 (4)
Wherein, d
1, d
2, d
3, d
4Be side-play amount.Formula (1) is in order to guarantee under the scene of the switch area of minizone intersection, this cell downlink DPCH can preferentially guarantee the quality of descending DPCH when forming mutual interference mutually with the HS-PDSCH of adjacent sub-district co-frequency co-time slot, the call drop to avoid the signaling bust this, and the HS-PDSCH of adjacent area co-frequency co-time slot is because be interfered, only can cause after the degradation HSPA downlink throughput capacity to descend, and can not cause call drop.In addition, adjacent sub-district does not work as dispatcher to the HS-PDSCH time interval resource that is interfered by the HSPA dispatching algorithm, and perhaps the terminal of inside, adjacent sub-district is given in scheduling, so can eliminate the mutual interference mutually of this cell downlink DPCH and adjacent sub-district co-frequency co-time slot HS-PDSCH yet.Formula (2), (3), (4), identical with the starting point of formula (1), all be in order to guarantee that the corresponding downstream control channel is when with adjacent area downstream data channel HS-PDSCH the co-frequency co-time slot interference taking place, can preferentially guarantee the transmission quality of down control channel, to reduce call drop, scheduling failed probability.
In addition, in the networking process, can guarantee under the prerequisite that satisfies the maximum HSPA number of terminals of sub-district single-frequency point support, the configuration of HSPA to be carried out in the sub-district, compatible R4, R5, R7 according to the uplink and downlink timeslot configuration of given sub-district.During for HSPA traffic assignments up-downgoing A-DPCH, need take fixedly code channel resource, so planned the sub-district single frequency point after the maximum HSPA number of terminals that should support, must reserve corresponding code channel resource and give up-downgoing A-DPCH, according to the resource allocation request of other 8 kinds of physical channel HS-PDSCH, HS-SCCH, HS-SICH, E-PUCH, E-UCCH, E-AGCH, E-HICH, E-RUCCH and for satisfying the relation between the R4 service resources demand, remaining time slot, code channel resource are planned as a whole to dispose again.
For better the present invention will be described, be that example describes the channel configuration situation with each sub-district under the frequency with time slot proportion 3: 3 (3 descending time slots of 3 ascending time slots) and 2: 4 (4 descending time slots of 2 ascending time slots) below, those skilled in the art as can be known, for other time slot proportion situation, for example 4: 2,1: 5 etc., the present invention can realize equally.
Suppose the capacity of 10 HSPA terminals of planning on the single HSPA frequency in sub-district, so, at two kinds of typical time slot proportion 3: 3 (3 descending time slots of 3 ascending time slots) and 2: 4 (4 descending time slots of 2 ascending time slots) in the commercial network, can do following configuration: at identical 1 HS-SCCH of a descending time slot configuration, article 1, E-AGCH, article 1, the E-HICH of the E-HICH of scheduling type and 1 non-scheduling type, so just take the code channel of 6 SF=16 altogether, the required descending DPCH that the uses when code channel of 10 remaining SF=16 can insert for 10 HSPA terminals.At present the A-DPCH of HSPA can carry out frame and divides multiplexingly, divides multiplexingly if A-DPCH carries out 2 times of frames, then can insert 10 HSPA terminals, divide multiplexing if A-DPCH carries out 4 times of frames, then can insert 20 HSPA terminals, divide multiplexingly, then can only insert 5 HSPA terminals if A-DPCH does not carry out frame.Following table 2 is identical networking configuration (channel configuration) situations of HSPA under 3: 3 proportionings of uplink and downlink timeslot, table 3 is the identical networking configuring conditions of HSPA under 2: 4 proportionings of uplink and downlink timeslot, wherein, sub-district A, sub-district B, sub-district C, sub-district D represent sub-district adjacent in twos in the network.
Table 2
| On the business time-slot 33 times | Sub-district A | Sub-district B | Sub-district C |
| TS1↑ | Control channel | Control channel | Control channel |
| TS2↑ | Data channel | Data channel | Data channel |
| TS3↑ | Data channel | Data channel | Data channel |
| TS4↓ | Control channel | Data channel | Data channel |
| TS5↓ | Data channel | Control channel | Data channel |
| TS6↓ | Data channel | Data channel | Control channel |
Table 3
| On the business time-slot 24 times | Sub-district A | Sub-district B | Sub-district C | Sub-district D |
| TS1↑ | Control channel | Control channel | Control channel | Control channel |
| TS2↑ | Data channel | Data channel | Data channel | Data channel |
| TS3↓ | Control channel | Data channel | Data channel | Data channel |
| TS4↓ | Data channel | Control channel | Data channel | Data channel |
| TS5↓ | Data channel | Data channel | Control channel | Data channel |
| TS6↓ | Data channel | Data channel | Data channel | Control channel |
According to above-mentioned identical networking scheme of the present invention, the running status of various channels in the TD-SCDMA network to HSPA describes below:
When the terminal of carrying out the HSPA business is in inside, sub-district, because signal is stronger, channel circumstance is better, terminal can not occur the sub-district basically yet and switch, in this case, the power of down control channels such as descending DPCH, HS-SCCH, E-AGCH will be under can reducing under the effect of power control.The power of HS-PDSCH is fixed, and what we can be with the power setting of HS-PDSCH is low, also can reach transmission quality preferably in inside, sub-district, like this, also will reduce the interference of the down control channel on the neighbor cell co-frequency co-time slot.
When the terminal of carrying out the HSPA business is in sub-district covering feeble field or switch area, boundary, minizone, because the deterioration of channel circumstance itself, add to be subjected to other-end is raised power in identical feeble field or switch area influence, its transmission quality will descend.A basic principle according to HSPA dispatching algorithm meeting reference channel environment, can be with the resource of HSPA, the reasonable terminal of channel circumstance is given in the tendency scheduling, the terminal relatively poor to channel circumstance will reduce scheduling, for having higher QoS (Quality of Service, service quality) terminal of Yao Qiuing then disturbs little HS-PDSCH time slot and E-PUCH time slot to dispatch by preferential employing, to guarantee to satisfy minimum guarantee speed, and will for these terminals, disturb big HS-PDSCH time slot and E-PUCH timeslot scheduling to use for other HSPA terminals of sub-district, terminal or the qos requirement low terminal good as sub-district internal channel environment, perhaps simply do not dispatch and disturb big HS-PDSCH time slot and E-PUCH time slot---descending interference size can be passed through Interference Signal Code Power (the Interference Signal Code Power of the descending time slot of terminal to report, abbreviate ISCP as) to obtain, the uplink interference size can obtain by the measurement of base station to ascending time slot ISCP.At this time, except A-DPCH, send to the down control channel HS-SCCH of sub-district inside terminals, E-AGCH, the signal of E-HICH and downstream data channel HS-PDSCH will can not be transmitted on the switch area of outside, sub-district under the constraint control of base station intelligent antenna wave beam forming, thereby can effectively reduce the descending co-channel interference of neighboring interval intersection, accordingly, because the chance that the HSPA terminal in the switch area is scheduled reduces, the transmission frequency of its upstream and downstream control channel HS-SICH and upstream and downstream data channel E-PUCH (nested E-UCCH) also can reduce, thereby the up co-channel interference of neighboring interval also can effectively be reduced.In addition, terminal is when switching, and its data will respective interrupt a period of time, and do not have corresponding channel yet and transmitting this moment.These situations all can reduce the co-channel interference of neighboring interval.Because the constraint of formula (1) to (4) and the power of descending DPCH pass through the power console up to arriving certain signal to noise ratio, just can guarantee that terminal keeps and handover success rate by the switch area in the communication of feeble field, and treat terminal enter into inside, sub-district, when channel circumstance improves, can lower power again by power control again, minimizing guarantees sub-district HSPA quality of service to the interference of other-end.
From top analysis as can be seen, running status characteristics and the HSPA dispatching algorithm of the various channels of the present invention and HSPA in the TD-SCDMA network is complementary, when guaranteeing sub-district HSPA traffic load (comprising heap(ed) capacity and throughput), can effectively reduce descending co-channel interference, make to comprise that the cutting off rate of the miscellaneous service of HSPA all can be effectively controlled in the network.And through system emulation and real network test shows, the identical networking scheme that identical networking scheme of the present invention and given identical HSPA code channel resource and all cell configuration are all identical is compared, and has higher H SPA business throughput and lower cutting off rate.
Fig. 4 is the composition structure chart according to the base station of the embodiment of the invention, and as shown in Figure 4, this base station comprises:
By means of base station of the present invention, the down control channel of two neighbor cells by will utilizing same frequency bearer service is configured on the different time slots, the descending co-channel interference between neighbor cell be can effectively control, the communication service quality of terminal and the quality of service of whole network improved.
Fig. 4 is the base station corresponding with previous methods, and the course of work of base station and operation principle are described in detail in the method part, do not repeat them here, and the description of appropriate section gets final product in the reference method.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an inter-frequency networking method is characterized in that, comprising:
For any two neighbor cells in all sub-districts that utilize same frequency bearer service, preferentially the down control channel with these two neighbor cells is configured on the different time slots.
2. method according to claim 1 is characterized in that, also comprises:
If the down control channel of any two neighbor cells in all sub-districts all can't be configured on the different time slots, all descending co-channel interference values between neighbor cell in twos relatively then;
According to the quantity of all sub-districts and the quantity of all time slots, determine that down control channel is configured in the quantity of the neighbor cell on the different time slots, wherein, preferentially the down control channel of the part or all of neighbor cell that descending co-channel interference value is big in described all sub-districts is configured on the different time slots.
3. method according to claim 2 is characterized in that, also comprises:
Determine descending co-channel interference value between any two neighbor cells by network disturbed test result on the spot;
Wherein, the disturbed test on the spot of described network is a same frequency switch test professional between two neighbor cells, and then described network disturbed test result on the spot is the success rate of the same frequency switch test of business between two neighbor cells.
4. method according to claim 1 is characterized in that, also comprises:
Each down control channel for each sub-district in all sub-districts, the difference of the normalization solid size road power of the data channel of the normalization solid size road power maximum of described down control channel and this sub-district is arranged in the predetermined threshold value scope, makes the signal of described down control channel satisfy demodulation threshold.
5. method according to claim 4 is characterized in that, the signal of described down control channel satisfies demodulation threshold and is meant:
The signal to noise ratio of the signal of described down control channel is greater than or equal to default signal-noise ratio threshold; Perhaps,
The error rate of the signal of described down control channel is less than or equal to default error rate thresholding.
6. method according to claim 1 is characterized in that, also comprises:
For each sub-district in all sub-districts, the down control channel and the downstream data channel of described sub-district is disposed on the different time slots.
7. according to each described method in the claim 1 to 6, it is characterized in that, it is one of following that described down control channel comprises: following special physical channel, shared control channel, absolute grant channel, the automatic retransfer indication channel of mixing, described downstream data channel is the downlink physical shared channel.
8. a base station is characterized in that, comprising:
Configuration module is used for any two neighbor cells to all sub-districts that utilize same frequency bearer service, and preferentially the down control channel with these two neighbor cells is configured on the different time slots.
9. base station according to claim 8 is characterized in that, also comprises:
Control module, be used for each down control channel to all each sub-districts, sub-district, in the predetermined threshold value scope, make the signal of described down control channel satisfy demodulation threshold the difference of the normalization solid size road power of the downstream data channel of the normalization solid size road power maximum of described down control channel and this sub-district.
10. according to Claim 8 or 9 described base stations, it is characterized in that,
Configuration module, also be used for each down control channel to all each sub-districts, sub-district, the difference of the normalization solid size road power of the data channel of the normalization solid size road power maximum of described down control channel and this sub-district is arranged in the predetermined threshold value scope, makes the signal of described down control channel satisfy demodulation threshold.
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