CN102088774A - Dynamic channel allocating method and communication system - Google Patents
Dynamic channel allocating method and communication system Download PDFInfo
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- CN102088774A CN102088774A CN2009102420105A CN200910242010A CN102088774A CN 102088774 A CN102088774 A CN 102088774A CN 2009102420105 A CN2009102420105 A CN 2009102420105A CN 200910242010 A CN200910242010 A CN 200910242010A CN 102088774 A CN102088774 A CN 102088774A
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Abstract
The invention provides a dynamic channel allocating method and a communication system, aiming at solving the problem of same frequency interference. The method comprises the following steps of: dividing regions in a cell into interference fringes and non-interference fringes; and allocating different time slots to users on the interference fringes and the users on non-interference fringes in the cell. The method is a time slot allocating method on the basis of user position and can be used for reducing same frequency and same time slot interference in the identical cell. Moreover, by the virtue of the method, different time slots are also allocated to the users on the interference fringes in the cell and the users on the inference fringes in an adjacent cell. Thus, the effect of suppressing the same frequency and same time slot interference is reached.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of dynamic channel assignment method and a kind of communication system.
Background technology
In order to improve power system capacity, reduce interference, more effectively to utilize limited channel resource, cell mobile communication systems generally adopts channel allocation technique, promptly according to the actual conditions and the constraints of mobile communication, manages the technology that more users are inserted.
At TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, the Time Division-Synchronous Code Division Multiple Access access) in the system, usually adopt dynamic channel allocating technology in order, in certain zone, the available channel resources of several sub-districts is put together, by RNC (Radio NetworkController, radio network controller) unified management, by the cell call blocking rate, the candidate channel frequency of utilization, channel uses distance etc. all multifactor again, dynamically in each minizone that RNC administered, carry out time slot allocation between work intercarrier and the uplink downlink.
A kind of data frame structure with the TD-SCDMA system is an example below, and described dynamic channel allocating technology in order is described.
With reference to Fig. 1, be a kind of data frame structure schematic diagram of TD-SCDMA system.
Described data frame structure comprises 7 main time slots and 3 special time slots, and wherein, 7 main time slots are respectively TS0-TS6, and 3 special time slots are respectively descending pilot frequency time slot (DwPTS), uplink pilot time slot (UpPTS) and protection time slot (GP).In described 7 main time slots, TS0 always distributes to down link, and TS1 always distributes to up link, and other time slots can be used as the time slot of up link, also can be used as the time slot of down link, can flexible configuration.In this example, TS1, TS2, TS3 distribute to up link (being called ascending time slot), and TS0, TS4, TS5, TS6 distribute to down link (being called descending time slot).
At present the dynamic channel allocating technology in order that adopts is: by RNC the channel resource of administration sub-district is carried out priority queueing, the time slot allocation that priority is high is to the calling party.
Illustrate, the example that is assigned as with ascending time slot, the ascending time slot of supposing the system is TS1 and TS2, if user A request access network is arranged, then prioritization (optionally sort method has multiple) can be carried out to ascending time slot TS1 and TS2 in the base station, then that priority is higher time slot allocation is given user A, supposes to have distributed time slot TS2.After user A inserted successfully, if user B request access network is arranged again, then prioritization can be carried out to ascending time slot TS1 and TS2 equally in the base station, and suppose that the priority of time slot TS1 is higher than time slot TS2 this moment, then time slot TS1 distributed to user B and use.The base station is also adopted the distribution of descending time slot and is used the same method.
In the TD-SCDMA system, interference is a key factor that influences systematic function, and disturbs the reason that all many-sides are arranged, and wherein co-channel interference is particularly outstanding.So-called co-channel interference is meant that different user takies identical working frequency points and time slot.Above example explanation, if after channel resource carried out prioritization, user A and user B had distributed ascending time slot TS2 to insert, and the two takies identical working frequency points, then user A and user B have just constituted co-channel interference.Perhaps, if before user A and user B difference access slot TS2 and the TS1, inserted other users on these two time slots, then other users on user A and the time slot TS2 constitute co-channel interference, and other users on user B and the time slot TS1 constitute co-channel interference.
In sum, if the number of users that request inserts is a lot, when distributing time slot according to above-mentioned dynamic channel assignment method, a plurality of users are assigned on the identical time slot probably, therefore occur the problem of co-channel interference easily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of dynamic channel assignment method and a kind of communication system, to solve the problem of co-channel interference.
In order to address the above problem, the invention discloses a kind of dynamic channel assignment method, comprising:
With the area dividing in the sub-district is interference fringe and non-interference fringe;
For the user on the interference fringe in the sub-district distributes different time slots with user on the non-interference fringe.
Wherein, describedly distribute different time slots to comprise with user on the non-interference fringe for the user on the interference fringe in the sub-district: according to time slot configuration information, for the user on the interference fringe in the sub-district distributes different ascending time slots with user on the non-interference fringe, perhaps distribute different descending time slots with user on the non-interference fringe for the user on the interference fringe in the sub-district.
Preferably, described method also comprises: for the user on the local area interference fringe distributes different time slots with user on the neighbor cell interference band.
Preferably, described method also comprises: for the user on user on the same disturbance band or the identical non-interference fringe, by comparing the priority of each time slot, the time slot priority allocation that priority is higher is given the user.
Preferably, the priority of each time slot relatively in the following manner: at ascending time slot, measure the interference signal intensity of each time slot and compare, if the interference of time slot is more little, then the priority of this time slot is high more; At descending time slot, measure the transmitting power of each time slot and compare, if the transmitting power of time slot is more little, then this time slot interference more little, the priority of this time slot is high more.
Preferably, the priority of each time slot relatively in the following manner: the last spread spectrum code channel resource of each time slot relatively, if the last spread spectrum code channel resource of time slot is many more, then the priority of this time slot is high more.
Preferably, be interference fringe and non-interference fringe in the following manner with the area dividing in the sub-district: calculate the poor of local area signal strength signal intensity and neighboring area signal intensity, difference is set at interference fringe less than the zone of preset parameter, difference is set at non-interference fringe more than or equal to the zone of described preset parameter.
Preferably, for user on the interference fringe in the sub-district and user on the non-interference fringe distribute before the different time slots, also comprise: by calculating the poor of local area signal strength signal intensity and neighboring area signal intensity, the judgement user is in the position of sub-district.
The present invention also provides a kind of communication system of carrying out dynamic channel allocation, comprises radio network controller and user terminal, and described radio network controller comprises:
The area dividing unit, being used for the area dividing in the sub-district is interference fringe and non-interference fringe;
The dynamic channel allocation unit is used to that the user terminal on the user terminal on the interference fringe and non-interference fringe distributes different time slots in the sub-district.
Preferably, described radio network controller also comprises: dispensing unit, be used to carry out time slot configuration, generate time slot configuration information, set the user terminal on the interference fringe in the sub-district in the described time slot configuration information and used different ascending time slots with user terminal on the non-interference fringe, and the different descending time slot of user terminal use on the user terminal on the interference fringe and the non-interference fringe sub-district in; Described dynamic channel allocation unit carries out time slot allocation according to described time slot configuration information.
Preferably, described dynamic channel allocation unit also is used to the user terminal on the local area interference fringe to distribute different time slots with user terminal on the neighbor cell interference band.
Preferably, described dynamic channel allocation unit comprises: priority ratio is used for the user terminal on user terminal on the same disturbance band or the identical non-interference fringe than subelement, relatively the priority of each time slot; The channel allocation subelement is used for the time slot priority allocation that priority is higher and gives user terminal.
Preferably, described area dividing unit comprises: computation subunit is used to calculate the poor of local area signal strength signal intensity and neighboring area signal intensity; Divide subelement, be used for difference is set at interference fringe less than the zone of preset parameter, difference is set at non-interference fringe more than or equal to the zone of described preset parameter.
Compared with prior art, the present invention has the following advantages:
At first, the present invention proposes a kind of time slot allocation scheme based on customer location, this scheme has taken into full account the zone that signal is strong and signal is weak in the whole cell coverage area, its signal disturbs different situations, with the area dividing in the sub-district is interference fringe and non-interference fringe, distributes different time slots for the user on the interference fringe in the sub-district with user on the non-interference fringe then.Like this, even different user takies identical working frequency points, be different with the shared time slot of user on the non-interference fringe owing to be in interference fringe, therefore can reduce the co-frequency co-time slot interference same sub-district in.
Secondly, further, the present invention has also taken into full account the strong jamming situation that may exist between the neighbor cell, for the user on the local area interference fringe also distributes different time slots with user on the neighbor cell interference band.Like this, also can reach and suppress the co-frequency co-time slot effects of jamming.
In sum, the present invention can in time adjust the time interval resource of distributing to the user by the user is carried out position judgment, reaches the purpose of improvement system and user performance, thereby helps promoting the index of correlation such as call completing rate, cutting off rate of network.
Description of drawings
Fig. 1 is a kind of data frame structure schematic diagram of TD-SCDMA system in the prior art;
Fig. 2 is the division schematic diagram of described area interference band of the embodiment of the invention and non-interference fringe;
Fig. 3 is a kind of data frame structure schematic diagram of TD-SCDMA system in the embodiment of the invention;
Fig. 4 is the flow chart of the described a kind of dynamic channel assignment method of the embodiment of the invention;
Fig. 5 is the described a kind of communication system architecture figure that carries out dynamic channel allocation of the embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
In the cell coverage area, the user who is in zones of different is different for the annoyance level that receives from other user, and prior art is not considered this point when allocated channel.And the present invention has taken into full account the zone that signal is strong and signal is weak in the whole cell coverage area, and its signal disturbs different situations, proposes a kind of dynamic channel allocation schemes based on customer location.
Core idea of the present invention is: with the area dividing in the sub-district is interference fringe and non-interference fringe, then for the user on the interference fringe in the sub-district distributes different time slots with user on the non-interference fringe, thereby reduces the co-frequency co-time slot interference in the same sub-district; Further, on this basis, the present invention has also taken into full account the strong jamming situation that may exist between the neighbor cell, and for the user on the local area interference fringe also distributes different time slots with user on the neighbor cell interference band, thereby the co-frequency co-time slot that reduces between the neighbor cell disturbs.
Describe implementation of the present invention in detail below by embodiment.
At first introduce the definition of interference fringe and non-interference fringe in the sub-district.
What interference fringe and non-interference fringe defined all is a slice area information.In real system, there are a lot of adjacent areas a sub-district, for the arbitrary zone in the sub-district:
If satisfy following condition, then be defined as the interference fringe of this sub-district:
Local area PCCPCH_RSCP-adjacent area PCCPCH_RSCP＜TH+ Δ; (formula 1)
If satisfy following condition, then be defined as the non-interference fringe of this sub-district:
Local area PCCPCH_RSCP-adjacent area PCCPCH_RSCP 〉=TH+ Δ.(formula 2)
Wherein, PCCPCH_RSCP represents the signal strength signal intensity of broadcast channel; TH and Δ are two parameters that can be provided with, and TH represents the threshold value of dividing can be set to fixed value, and Δ is represented error range, and the parameter of property one by one that can be used as between each adjacent area is provided with.
Present embodiment is to distinguish interference fringe and non-interference fringe by the difference of calculating local area signal strength signal intensity and neighboring area signal intensity, certainly, also can adopt other mode, but aim is: disturb stronger zone and signal to disturb more weak area region to separate signal in the sub-district.
With reference to Fig. 2, be the division schematic diagram of described area interference band of the embodiment of the invention and non-interference fringe.
Wherein, sub-district A and sub-district B be the adjacent area each other, and at each sub-district, circle is represented cell coverage area.It is good that the inner ring of sub-district A (being the non-interference fringe of sub-district A) expression covers signal, and it is relatively poor relatively that outer ring (being the interference fringe of sub-district A) represents that then signal covers.The inner ring of sub-district B is identical with sub-district A with the outer ring meaning.
For each sub-district, when carrying out time slot allocation, be respectively the user on the interference fringe in the sub-district and distribute different time slots with user on the non-interference fringe.Wherein, described time slot comprises ascending time slot and descending time slot, be the user on the interference fringe in the sub-district and distribute different ascending time slots, perhaps distribute different descending time slots with user on the non-interference fringe for the user on the interference fringe in the sub-district with user on the non-interference fringe.
Be example with the TD-SCDMA system still, data frame structure can be with reference to shown in Figure 3.Because among 7 main time slot TS0-TS6, TS0 always distributes to down link, and TS1 always distributes to up link, other time slots can be used as the time slot of up link, also can be used as the time slot of down link, can flexible configuration.Therefore, present embodiment can dispose TS0 as descending time slot, but not as transmitting user data; TS 1-TS6 is used for transmitting user data, and wherein TS1 and TS2 are ascending time slot, and TS3, TS4, TS5, TS6 are as descending time slot, and promptly the up-downgoing business time-slot of this Frame was configured to 2: 4.
Based on the configuring condition of above-mentioned uplink and downlink timeslot, for sub-district A, can also carry out the configuration once more of time slot according to interference fringe and non-interference fringe, dispose as follows:
To the non-interference fringe of sub-district A, ascending time slot uses TS1, and descending time slot uses TS3 and TS4;
To the interference fringe of sub-district A, ascending time slot uses TS2, and descending time slot uses TS5 and TS6.
Like this, interference fringe is different with the ascending time slot that non-interference fringe uses among the A of sub-district, and the descending time slot of use is also different.If two different users have inserted respectively on the interference fringe and non-interference fringe of sub-district A,, but, therefore also can not cause the problem of co-channel interference because the uplink and downlink timeslot that uses is all different even the working frequency points that takies is identical.And prior art is that all time slots are all distributed according to priority, cell area is not divided, and therefore occurs the situation of two identical time slots of the identical frequency of CU probably.
How this disposes time slot for the sub-district B adjacent with sub-district A so, and also being needs careful consideration.Because the fringe region phase mutual interference of neighbor cell is stronger, if the interference fringe of sub-district A and sub-district B uses identical frequency, if and have user A to insert in the outer ring of sub-district A (being interference fringe), user B inserts in the outer ring of sub-district B (being interference fringe), and the frequency that inserts is identical, if insert used time slot too according to prior art user A and user B, it is very strong disturbing so, causes the user to go offline easily or anomaly such as access failure.
Therefore, preferred, can also distribute different time slots with user on the neighbor cell interference band for the user on the local area interference fringe.Based on the configuring condition of above-mentioned uplink and downlink timeslot,, can carry out following time slot to interference fringe and non-interference fringe and dispose again for sub-district B:
To the non-interference fringe of sub-district B, ascending time slot uses TS2, and descending time slot uses TS5 and TS6;
To the interference fringe of sub-district B, ascending time slot uses TS1, and descending time slot uses TS3 and TS4.
Like this, not only interference fringe has used different ascending time slots with non-interference fringe among the B of sub-district, and has used different descending time slots, has reached the effect of the minimizing co-channel interference identical with sub-district A.And the user A that inserts sub-district A interference fringe is time slot TS2 up use, and the user B that inserts sub-district B interference fringe up use be time slot TS1, can avoid co-channel interference; Equally, the user A that inserts sub-district A interference fringe is time slot TS5 and TS6 descending use, and the user B that inserts sub-district B interference fringe descending use be time slot TS3 and TS4, also can avoid co-channel interference.
In actual environment, each user may move on interference fringe and non-interference fringe, just can carry out position judgment to the user according to above-mentioned decision condition this moment, thereby in time adjust the time interval resource of distributing to the user, avoids the user who is in interference fringe co-channel interference to occur.
In addition, foregoing has illustrated on interference fringe and the non-interference fringe how to distribute time slot, for the user who is in the same area (all being on interference fringe or the non-interference fringe as different user), how does this distribute time slot so?
In advance interference fringe and non-interference fringe are being configured on the basis of time slot, present embodiment provides two kinds to sort according to channel resource, and the time slot allocation that priority is high is given calling party's method.Specific as follows:
Method one:
Time slot ordering based on measurement and transmitting power: promptly for ascending time slot, measure the interference of each time slot, if the interference of certain ascending time slot is more little, then the priority of user priority access is high more; For descending time slot, then be the transmitting power of measuring each time slot, if the transmitting power of certain descending time slot is more little, the load that this time slot then is described may be less, and when new user inserted, the system interference of bringing also may be more little, therefore, the priority of this descending time slot is also just high more.
Method two: the time slot that carries out according to code channel resource sorts
The time slot that carries out according to code channel resource sorts: what this scheme was considered is the ordering of how much carrying out of the last resource of each time slot, in the TD-SCDMA system, the basic resources unit of system is the spread spectrum code channel, the spreading factor of each spread spectrum code channel mostly is 16 most, therefore, the last spread spectrum code channel resource of certain time slot is many more, and then its priority is just high more.
In sum, scheme of the present invention is a kind of dynamic time slot allocating method based on customer location, avoid co-frequency co-time slot to disturb by distributing different time slots as far as possible, reach the purpose of improvement system and user performance, thereby help promoting the index of correlation such as call completing rate, cutting off rate of network.
Based on above-mentioned dynamic channel assignment method, a sub-district access calling party's process will be described below in the mode of steps flow chart.
With reference to Fig. 4, be the flow chart of the described a kind of dynamic channel assignment method of the embodiment of the invention.
Step 401 receives user 1 access request;
Step 402 is judged the position of user 1 in the sub-district;
According to formula 1 and formula 2, by calculating the poor of neighboring area signal intensity that user 1 receives the signal strength signal intensity and the user 1 of local area, can judge the interference fringe that user 1 is in the sub-district also is non-interference fringe;
Step 403 is determined user 1 access frequency point;
Step 404 is according to time slot configuration information, for user 1 distributes time slot;
Described time slot configuration informational needs is provided with in advance.For the TD system, the branch of uplink and downlink timeslot is arranged, for general networking, all be that fixed configurations several (or certain) time slot is up, certain is several (or certain), and time slot is descending; And which ascending time slot the interference fringe that has also disposed the sub-district uses, and which descending time slot non-interference fringe uses.Total equipping rules is: the interference fringe of same sub-district uses different time slots with non-interference fringe, and the interference fringe of neighbor cell also uses different time slots.
With the example that is assigned as of ascending time slot, suppose that user 1 is on the non-interference fringe, according to time slot configuration information, the ascending time slot that the non-interference fringe in this sub-district uses is TS1 and TS2, interference fringe uses other different ascending time slot.Interferometry can be carried out to ascending time slot TS1 and TS2 in the base station, supposes that the interference of measuring is respectively ISCP11 and ISCP21, and ISCP11＞ISCP21, and then when user 1 asked to insert, system distributed time slot TS2 will preferentially for user 1.Because each time slot comprises a plurality of code channels again, can distribute according to the operating position of this time slot when then distributing code channel, suppose that user 1 is speech business, then take 2 spreading factors and be 16 code channel.
Step 405 after user 1 inserts successfully, receives user 2 access request;
Step 406 is judged the position of user 2 in the sub-district;
Suppose that user 2 also is in the non-interference fringe of this sub-district;
Step 407 is determined user 2 access frequency point;
Suppose that user 2 is identical with user 1 access frequency point;
Step 408 is according to time slot configuration information, for user 2 distributes time slot.
Still with the example that is assigned as of ascending time slot, according to time slot configuration information, the ascending time slot of this non-interference fringe in sub-district is TS1 and TS2, supposes that the interferometry of this moment is ISCP12 and ISCP22, and ISCP12＜ISCP22, then is preferably user 2 and distributes time slot TS1.
Flow process when the sub-district has the user to ask to insert at every turn, all according to time slot configuration information dynamic assignment time slot, is avoided the user of a plurality of same frequencys is assigned in the identical time slot as far as possible according to the method described above.
At said method embodiment, the present invention also provides a kind of embodiment of communication system, carries out dynamic time gap allocation on the basis of the sub-district being divided interference fringe and non-interference fringe.
With reference to Fig. 5, be the described a kind of communication system architecture figure that carries out dynamic channel allocation of the embodiment of the invention.
Described communication system mainly comprises radio network controller (RNC) 10 and user terminal 11, the a plurality of sub-districts of radio network controller 10 unified managements, when user terminal 11 requests insert certain sub-district, dynamically between each minizone of being administered, work intercarrier and uplink downlink, carry out time slot allocation by radio network controller 10.
Described radio network controller 10 mainly comprises:
Area dividing unit 51, being used for the area dividing in the sub-district is interference fringe and non-interference fringe;
Dynamic channel allocation unit 52 is used to that the user terminal on the user terminal on the interference fringe and non-interference fringe 11 distributes different time slots in the sub-district.
Wherein, area dividing unit 51 carries out dividing region by following decision condition:
If satisfy following condition, then be defined as the interference fringe of sub-district:
Local area PCCPCH_RSCP-adjacent area PCCPCH_RSCP＜TH+ Δ; (formula 1)
If satisfy following condition, then be defined as the non-interference fringe of sub-district:
Local area PCCPCH_RSCP-adjacent area PCCPCH_RSCP 〉=TH+ Δ.(formula 2)
According to formula 1 and formula 2, described area dividing unit 51 can comprise:
Computation subunit is used to calculate the poor of local area signal strength signal intensity and neighboring area signal intensity;
Divide subelement, be used for difference is set at interference fringe less than the zone of preset parameter, difference is set at non-interference fringe more than or equal to the zone of described preset parameter.
Wherein, described dynamic channel allocation unit 52 is to carry out time slot allocation according to time slot configuration information, and therefore, described radio network controller 10 can also comprise:
Dispensing unit 53, be used to carry out time slot configuration, generate time slot configuration information, set the user terminal on the interference fringe in the sub-district in the described time slot configuration information and used different ascending time slots with user terminal on the non-interference fringe, and the different descending time slot of user terminal use on the user terminal on the interference fringe and the non-interference fringe sub-district in.
Described dynamic channel allocation unit 52 at first carries out the judgement of user terminal location according to formula 1 and formula 2, then according to above time slot configuration information, can be for the user terminal on interference fringe in the same sub-district and the non-interference fringe distribute different time slots, thus the interference of co-frequency co-time slot avoided as far as possible.
Preferably, described communication system has also taken into full account the strong jamming situation that may exist between the neighbor cell, therefore, described dynamic channel allocation unit 52 also is used to the user terminal on user terminal and the neighbor cell interference band on the local area interference fringe to distribute different time slots, suppresses the co-frequency co-time slot effects of jamming thereby reach.
For being in sub-district same area a plurality of users of (as all being on interference fringe or the non-interference fringe), described dynamic channel allocation unit 52 can also preferentially will sort forward time slot allocation to the user according to the method for time slot ordering.Therefore, described dynamic channel allocation unit 52 can also comprise:
Priority ratio is used for the user terminal on user terminal on the same disturbance band or the identical non-interference fringe than subelement, relatively the priority of each time slot;
The channel allocation subelement is used for the time slot priority allocation that priority is higher and gives user terminal.
Present embodiment provides two kinds of time slot priority ratios modes: a kind of time slot ordering that is based on measurement and transmitting power, another kind are the time slot orderings of carrying out according to code channel resource.
In sum, the described communication system of present embodiment has taken into full account the zone that signal is strong and signal is weak in the whole cell coverage area, its signal disturbs different situations, and the co-frequency co-time slot that distributes different time slots to reduce in the same sub-district for user on the interference fringe in the sub-district and user on the non-interference fringe disturbs; And, described communication system has also taken into full account the strong jamming situation that may exist between the neighbor cell, for the user on the local area interference fringe also distributes different time slots with user on the neighbor cell interference band, the problem of as far as possible avoiding co-frequency co-time slot to disturb, thereby reach the purpose of improvement system and user performance, thereby help promoting the index of correlation such as call completing rate, cutting off rate of network.
The present invention is not only applicable to the TD-SCDMA system, can also be applied to other time division multiplex system or networking, carries out distributing based on the dynamic slot of customer location.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For system embodiment, because it is similar substantially to method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
More than to a kind of dynamic channel assignment method provided by the present invention and a kind of communication system, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1. a dynamic channel assignment method is characterized in that, comprising:
With the area dividing in the sub-district is interference fringe and non-interference fringe;
For the user on the interference fringe in the sub-district distributes different time slots with user on the non-interference fringe.
2. method according to claim 1 is characterized in that, describedly distributes different time slots to comprise with user on the non-interference fringe for the user on the interference fringe in the sub-district:
According to time slot configuration information,, perhaps distribute different descending time slots with user on the non-interference fringe for the user on the interference fringe in the sub-district for the user on the interference fringe in the sub-district distributes different ascending time slots with user on the non-interference fringe.
3. method according to claim 1 is characterized in that, also comprises:
For the user on the local area interference fringe distributes different time slots with user on the neighbor cell interference band.
4. according to claim 1 or 3 described methods, it is characterized in that, also comprise:
For the user on user on the same disturbance band or the identical non-interference fringe, by comparing the priority of each time slot, the time slot priority allocation that priority is higher is given the user.
5. method according to claim 4 is characterized in that, compares the priority of each time slot in the following manner:
At ascending time slot, measure the interference signal intensity of each time slot and compare, if the interference of time slot is more little, then the priority of this time slot is high more;
At descending time slot, measure the transmitting power of each time slot and compare, if the transmitting power of time slot is more little, then this time slot interference more little, the priority of this time slot is high more.
6. method according to claim 4 is characterized in that, compares the priority of each time slot in the following manner:
The last spread spectrum code channel resource of each time slot relatively, if the last spread spectrum code channel resource of time slot is many more, then the priority of this time slot is high more.
7. method according to claim 1 is characterized in that, is interference fringe and non-interference fringe in the following manner with the area dividing in the sub-district:
Calculate the poor of local area signal strength signal intensity and neighboring area signal intensity, difference is set at interference fringe less than the zone of preset parameter, difference is set at non-interference fringe more than or equal to the zone of described preset parameter.
8. method according to claim 7 is characterized in that, for user on the interference fringe in the sub-district and user on the non-interference fringe distribute before the different time slots, also comprises:
By calculating the poor of local area signal strength signal intensity and neighboring area signal intensity, judge the position of user in the sub-district.
9. a communication system of carrying out dynamic channel allocation comprises radio network controller and user terminal, it is characterized in that, described radio network controller comprises:
The area dividing unit, being used for the area dividing in the sub-district is interference fringe and non-interference fringe;
The dynamic channel allocation unit is used to that the user terminal on the user terminal on the interference fringe and non-interference fringe distributes different time slots in the sub-district.
10. system according to claim 9 is characterized in that, described radio network controller also comprises:
Dispensing unit, be used to carry out time slot configuration, generate time slot configuration information, set the user terminal on the interference fringe in the sub-district in the described time slot configuration information and used different ascending time slots with user terminal on the non-interference fringe, and the different descending time slot of user terminal use on the user terminal on the interference fringe and the non-interference fringe sub-district in;
Described dynamic channel allocation unit carries out time slot allocation according to described time slot configuration information.
11. system according to claim 9 is characterized in that:
Described dynamic channel allocation unit also is used to the user terminal on user terminal and the neighbor cell interference band on the local area interference fringe to distribute different time slots.
12., it is characterized in that described dynamic channel allocation unit comprises according to claim 9 or 11 described systems:
Priority ratio is used for the user terminal on user terminal on the same disturbance band or the identical non-interference fringe than subelement, relatively the priority of each time slot;
The channel allocation subelement is used for the time slot priority allocation that priority is higher and gives user terminal.
13. system according to claim 9 is characterized in that, described area dividing unit comprises:
Computation subunit is used to calculate the poor of local area signal strength signal intensity and neighboring area signal intensity;
Divide subelement, be used for difference is set at interference fringe less than the zone of preset parameter, difference is set at non-interference fringe more than or equal to the zone of described preset parameter.
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