CN102340859A - Uplink interference coordination method equipment thereof - Google Patents

Abstract

The invention discloses an uplink interference coordination method equipment thereof. The method comprises the following steps that: a base station determines an interference area of a user terminal according to a pilot signal intensity of an adjacent cell and a maximum transmitting power spectral density of the user terminal, wherein the pilot signal intensity is measured by the user terminal; a type of the user terminal is determined according to the interference area of the user terminal; and a priority level of the user terminal for using a base station frequency resource is determined on the basis of the type of the user terminal. According to the invention, an interference area of a user terminal is determined through a pilot signal intensity of an adjacent cell and a maximum transmitting power spectral density of the user terminal, wherein the pilot signal intensity is reported by the user terminal; and then on the basis of the an interference situation of the adjacent cell by the user terminal, various priority levels for using frequency resources are determined for different user terminals, so that uplink interference between cells is reduced and thus an occurrence of a phenomenon of frequency overwhelming is reduced.

Description

Uplink interference coordination approach and equipment

Technical field

The present invention relates to the OFDMA/SC-FDMA cellular network, more specifically, relate to a kind of uplink interference coordination approach and equipment.

Background technology

With OFDM (Orthogonal Frequency-Division MultipleAccess; OFDMA)/single-carrier frequency division multiple access (Single Carrier Frequency-DivisionMultiple Access; SC-FDMA) in the mobile communications network for the access mode structure; The frequency duplex factor as one of minizone is 1, that is, all sub-districts in the whole system coverage can use identical frequency band for the user in this sub-district service to be provided.Because the frequency that the user uses in the sub-district is mutually orthogonal, so can think that all interference all come from other sub-districts.Like this; Improved the Signal Interference and Noise Ratio of Cell Center User on the one hand greatly, promoted the service quality of central user, but then because neighbor cell takies same frequency resource; For Cell Edge User; Can receive the bigger same frequency in adjacent sub-district and disturb, make that the service quality of Cell Edge User is relatively poor, throughput is lower.Here it is OFDM (Orthogonal Frequency DivisionMultiplexing, " presence of intercell interference " problem that OFDM) needs to be resolved hurrily in the network.

The interference coordination technique of minizone is exactly to reduce the received signal to noise ratio of the conflict of resource on time and frequency of neighbor cell fringe region use with reduction amount of interference level, raising signal through the effective distribution to system resource; Thereby improve the service quality at system cell edge, even the service quality of whole system.

According to the difference of link direction, can the interference of minizone be divided into descending interference and uplink interference.Carry out brief account in the face of the descending and uplink interference problem of minizone down.

Fig. 1 is a typical minizone descending interference scene sketch map.

As shown in Figure 1; User terminal T1 and T2 serve Node B respectively (wherein; Node B is through the Iub interface and the radio network controller interconnection of standard; Communicate through Uu interface and terminal, mainly accomplish the processing of Uu interface PHY and Iub interface agreement) A and Node B B, and use identical frequency resource to carry out downlink communication.When user terminal T1, T2 move to the cell edge of Node BA and Node B B and when nearer, the downstream signal that Node B B sends to T2 will produce T1 and disturb.Because T1 and T2 close together and all at cell edge, the intensity that T1 receives from the interference signal of Node B B is comparable to the service signal of Node B A to the T1 transmission, so Node B B can cause very strong descending presence of intercell interference to T1 user.

Fig. 2 is typical inter-cell uplink interference scene sketch map.

As shown in Figure 2, user terminal T1 and T2 serve Node B A and Node B B respectively, and use identical frequency resource to carry out uplink communication.When user terminal T1, T2 move to the cell edge of Node BA and Node B B and when nearer, the upward signal that user terminal T1 issues Node B A will produce Node B B and disturb.Because T1 and T2 close together and all at cell edge, the interference signal intensity that Node B B receives from T1 is comparable to the service signal of T2 to Node B B transmission, disturbs so T1 can cause between very strong uplink cells Node B B.

Aspect the research of descending interference, permitted manufacturer of great company and proposed more feasible static and semi-static interference coordination schemes, for example, the soft-frequency reuse scheme of Huawei, the partial frequency multiplexing scheme of Alcatel etc.To be the frequency resource used through the restriction edge customer reduce the same frequency that edge customer receives with restriction Node B to the transmitting power of edge customer to their main thought disturbs.

And aspect the research of uplink interference coordination, a kind of method that can solve the uplink interference coordination of relatively generally acknowledging is not also proposed at present.At present, the solution of interference problem between uplink cells is mainly contained two big types: the first, the frequency and the power resource of restriction edge customer, the scheme of this and downlink interference collaboration is similar; The second, (HighInterference Indicator, HII) (Overload Indicator OI) carries out the uplink interference coordination with the overload indication in the transmission high interference indication of passing through in the minizone that 3GPP proposes.

First type is to the frequency resource of user's use in the sub-district and the static division of power resource.Introduce in the up soft-frequency reuse scheme division methods below to user's frequency and power.

Fig. 3 is a soft-frequency reuse scheme sketch map.

As shown in Figure 3; If S is Long Term Evolution (Long Term Evolution, LTE) set (S1, the S2 of all frequency resources in the employed bandwidth of system; S3); According to the frequency resource splitting scheme of Fig. 3 (b), S is divided into three sub-set S1, S2 and S3, and the frequency non-overlapping copies in this three sub-set.Shown in Fig. 3 (a), two-layer inside and outside each sub-district is divided into, promptly; The white central user zone of internal layer and outer field shade edge customer zone, frequency resource collection S1, S2 and S3 are assigned to each sub-district in the system, and outer users can only be assigned to the shade frequency resource of correspondence and with maximum power transmission; Inner users can be assigned to white frequency resource, and (for example, the outer users of sub-district 1 can be assigned to S1, and inner users can be assigned to S2 and S3; By that analogy, sub-district 2,4 and 6 outer users can be assigned to S2, and inner users can be assigned to S1 and S3; Sub-district 3,5 and 7 outer users can be assigned to S3, and inner users can be assigned to S1 and S2).When the frequency resource of internal layer is not enough, can be used for outer frequency resource of being distributed, and launches with lower-wattage.Through such frequency resource division methods and frequency resource allocation of space scheme; The frequency of " on one's own initiative " division edge customer before scheduling of resource; Can guarantee the subcarrier non-overlapping copies that the fringe region of neighbor cell is assigned to; Thereby make to be in the presence of intercell interference that the portable terminal in this zone receives and to drop to a very low degree, improved the service quality of cell edge.

But this scheme exists significantly not enough: the first, and the edge customer availability of frequency spectrum is low.The usable frequency of soft-frequency reuse Cell Edge User has only 1/3, and when edge customer increased, the cutting off rate of Cell Edge User increased, and the number of users that system can serve reduces.Second; The soft-frequency reuse scheme can not change with the variation that the sub-district internal burden distributes; This will cause, and the central area frequency is superfluous, fringe region frequency phenomenon in short supply, seriously reduces the capacity and the spectrum efficiency of whole sub-district, also is the waste for frequency spectrum resource simultaneously.

Second type is to carry out interference coordination through minizone transmission HII and OI.

3GPP confirms that the up mode that can adopt the minizone to transmit high interference indication (HII) and overload indication (OI) information reduces presence of intercell interference.According to the network configuration of LTE, transmit HII and OI information through X2 interface between the adjacent sub-district.

HII: a base station is when giving a Cell Edge User with a resource block assignments; But owing to predict this user's interfere neighbor cell; Also receive simultaneously neighbor cell user's interference easily; Can this Resource Block information be sent to adjacent sub-district through HII information, after adjacent sub-district receives HII information, just avoid this resource block assignments is given the edge customer of this sub-district.

OI: when the base station detects certain Resource Block and receives stronger uplink interference; Through OI the information of this Resource Block is sent to neighbor cell; Neighbor cell reduces the interference to this Resource Block through the user who uses this OI resource being carried out power control after receiving OI.

This scheme can be according to the dynamic distributes resource blocks of concrete disturbed condition of system; For all users; Can use the whole frequency resource in this sub-district in theory, can guarantee the throughput of this Cell Center User and edge customer, can prevent the system resource residue.But in this scheme, the interference coordination of minizone is too dependent on the interference indication information that transmits at X2 interface.When the edge customer of sub-district more for a long time, more Resource Block sends to neighbor cell as HII, too much Signalling exchange has increased the expense of system, has increased the weight of the intractability of base station, does not also utilize the stable of system.Simultaneously; Because the distinctive transmission delay of X2; Disturb indication information to have certain hysteresis quality, the interference indication information that receives in this moment base station like this possibly not be the resource that current time need carry out interference coordination, has just reduced the accuracy of interference coordination yet.

Because uplink interference is different from the particularity of descending interference, existing algorithm has been ignored the distinctive problem that uplink interference exists: the first, and Cell Center User service quality descends; The second, by " interference is flooded " phenomenon of interfered cell appearance.

One, Cell Center User service quality descends

Before the uplink interference coordinate scheme in, attention more be Cell Edge User disturb because edge customer receives the same frequency of neighbor cell more easily.And in up environment; As by the user of interfered cell, central user all will receive identical interference strength with edge customer, so under some actual communication environment; Central user also can receive the presence of intercell interference stronger with respect to useful signal, makes communication quality seriously descend.

Fig. 4 is the sight sketch map that Cell Center User is interfered.

As shown in Figure 4, suppose that a Resource Block of each CU (RB) communicates, the base station spacing is 500 meters.According to part power control, the uplink transmission power of user #1 and user #2 be respectively 24dBm and-18dBm; According to the signal propagation model of 2G hertz, the path loss that the signal of #1 and #2 arrives base station 1 is respectively 113dB and 70dB (promptly, no matter how near user and base station distance be for MCL, minimum coupling loss, and the loss between the user base station is MCL at least).At this moment, if user #2 is not interfered, the Signal to Interference plus Noise Ratio of user #2 (SINR) is so:

${\mathrm{<figure-callout\; id="2"\; label="SINR\; \#"\; filenames="HSA00000208494700021.png,HSA00000208494700022.png"\; state="\{\{state\}\}">SINR</figure-callout>}}_{\#}=\frac{-18\mathrm{dBm}-70\mathrm{dB}}{-174\mathrm{dBm}/\mathrm{Hz}\&times;180\mathrm{kHz}}>20\mathrm{dB}---\left(1\right)$

Yet when user #2 received the uplink interference from #1, the SINR of user #2 did

${\mathrm{SINR}\&prime;}_{\#2}=\frac{-18\mathrm{dBm}-70\mathrm{dB}}{(24\mathrm{dBm}-113\mathrm{dB})+174\mathrm{dBm}/\mathrm{Hz}\&times;180\mathrm{kHz}}\&ap;1\mathrm{dB}---\left(2\right)$

Wherein ,-174dBm/Hz is the frequency spectrum density of LTE white noise, and 180kHz is the bandwidth of a Resource Block.Above-mentioned SINR for user #2 calculates and has only considered the sight of single interference source, if a plurality of interference user #1 are arranged in the adjacent sub-district of sub-district 1, the uplink communication quality of user #2 can further descend so.

From top calculating, can find; The actual system configuration of up link and strategy; For example; Factors such as distance, user power control strategy, communication environments model and minimum coupling loss can influence the uplink interference intensity that Cell Center User receives between the base station, so scene is different, the practical communication quality of central user is also inequality.If the scene among Fig. 4, the communication quality of central user can be seriously influenced so.So, under the uplink interference environment, need to consider the interference coordination of central user.

Two, interference is flooded

In up scene, the edge customer nearer base station of adjusting the distance can produce bigger interference, so the distribution mechanism of the main resources for research of existing scheme makes that the user who gets resource is minimum to the interference of nearest adjacent base station.Yet, this be a kind of interference scene of " one to one ".If the angle with interfered base station considers that it will receive the interference from the edge customer of 6 neighbor cells.

Fig. 5 is the interference sketch map of neighbor cell.

As shown in Figure 5, sub-district 0 is in the interference of a plurality of neighbor cell edge customers.Since the base station at random be user's dividing frequency resource gain to obtain frequency selectivity, so for center cell (sub-district 0), its all or most subcarrier all receives the interference of neighbor cell edge customer probably.Even when the load of the edge of neighbor cell is relatively low, the situation that the whole frequency bands in above-mentioned this middle sub-district are interfered also might appear, and we claim that this phenomenon is " interference is flooded ".At this moment, all users' meetings of center cell are because receive uplink interference, and the uplink throughput of reduction center cell.

Obviously because the user is in different geographical; It will cause different influences to subcarrier, yet whether a user is the interference region that this information of edge customer is not enough judged this user; Can do nothing to help the base station distributes the resource that is fit to reduce the interference of this user to disturbed base station for it; If therefore the CONSIDERING EDGE user above-mentioned " interference is flooded " phenomenon do not occur in center cell probably to the disturbed condition of peripheral base station, reduced the service quality of center cell.

Summary of the invention

The technical problem that the present invention will solve provides a kind of uplink interference coordination approach, can reduce the generation of " interference is flooded " phenomenon.

The invention provides a kind of uplink interference coordination approach, comprising: the interference region of user terminal is confirmed in the base station according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and user terminal; Confirm the type of user terminal according to the interference region of user terminal; Confirm that according to the type of user terminal user terminal uses the priority of base station frequency resource.

According to an embodiment of the inventive method, this method also comprises: the Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the user terminal of measuring are compared; When the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal, according to the corresponding power control mode of the type selecting of user terminal.

According to another embodiment of the inventive method, the base station confirms that according to the pilot signal strength of the neighbor cell of user terminal measurement and the maximum transmission power spectrum density of user terminal the step of the interference region of user terminal comprises: the base station obtains the emissive porwer of neighbor cell pilot signal; Receive the pilot signal strength of the neighbor cell of user terminal measurement, and calculate the path loss of user terminal to neighbor cell according to the emissive porwer of neighbor cell pilot signal; Calculate the interfering signal power that neighbor cell receives according to user terminal to the path loss of neighbor cell and the maximum transmission power spectrum density of user terminal from user terminal; Interfering signal power and preset interference threshold are compared, to confirm the interference region of user terminal.

Another embodiment according to the inventive method; Preset interference threshold comprises strong jamming thresholding and weak jamming thresholding; Wherein, The strong jamming thresholding is higher than the weak jamming thresholding, and interfering signal power and preset interference threshold are compared, and comprises with the step of the interference region of confirming user terminal: interfering signal power and strong jamming thresholding and weak jamming thresholding are compared; At interfering signal power during greater than the strong jamming thresholding; Confirm that neighbor cell is in the strong jamming district of user terminal; When interfering signal power is between strong jamming thresholding and weak jamming thresholding; Confirm that neighbor cell is in the transition interference range of user terminal, during less than the weak jamming thresholding, confirm that neighbor cell is in the weak jamming district of user terminal at interfering signal power.

Embodiment again according to the inventive method; The interference region of user terminal comprises strong jamming district, transition interference range and weak jamming district, confirms that according to the interference region of user terminal the step of the type of user terminal comprises: whether have the sub-district of being disturbed in the strong jamming district at judges terminal; If there is the sub-district of being disturbed, confirm that then user terminal is a strong interferers, otherwise, confirm that user terminal is the weak jamming source.

Embodiment again according to the inventive method; Confirm that according to the type of user terminal user terminal uses the step of the priority of base station frequency resource to comprise: employed frequency resource R divides to each base station, and frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source; The type at judges terminal; At user terminal is under the situation in weak jamming source; Confirm the frequency resource Rw that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the frequency resource Rs that user terminal second preferentially uses base station, user terminal place to distribute as user terminal; At user terminal is under the situation of strong interferers; Confirm the frequency resource Rs that user terminal first preferentially uses base station, user terminal place to distribute as user terminal; The user terminal second preferential transition interference range of user terminal and the frequency resource Rs of base station, weak jamming district of using, user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of user terminal.

Embodiment again according to the inventive method; Comprise the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source with the corresponding SINR thresholding of type of user terminal; When the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal; Step according to the corresponding power control mode of type selecting of user terminal comprises: at user terminal is that the SINR of the user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of strong interferers, carries out inter-cell power control; At user terminal is that the SINR of the user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in weak jamming source, in the base station at user terminal place, carries out closed power control.

According to an embodiment again of the inventive method, the step of carrying out inter-cell power control comprises: the power control request of the frequency resource block Ru that user terminal is used is sent in the base station at user terminal place to neighbor cell; In neighbor cell, search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru; If the strong jamming district of the user terminal of frequency of utilization Resource Block Ru comprises the sub-district of transmission power control request in the neighbor cell; Then calculate the transmitting power on the neighbor cell medium frequency Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru in the neighbor cell is carried out power control.

Uplink interference coordination approach of the present invention; The neighbor cell pilot signal strength through user terminal to send up and the maximum transmission power spectrum density of user terminal are confirmed the interference region of user terminal; Then according to the disturbed condition of user terminal to neighbor cell; Confirm different frequency resources for different user terminals and use priority, with the uplink interference of minimizing minizone, thus the generation of minimizing " frequency is flooded " phenomenon.

Another technical problem that the present invention will solve provides a kind of uplink interference Mediation Device, can reduce the generation of " interference is flooded " phenomenon.

The invention provides a kind of uplink interference Mediation Device, comprising: interference region is confirmed device, is used for confirming according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and user terminal the interference region of user terminal; Terminal type is confirmed device, confirms that with interference region device links to each other, and is used for confirming according to the interference region of user terminal the type of user terminal; Priority is confirmed device, confirms that with terminal type device links to each other, and is used for confirming that according to the type of user terminal user terminal uses the priority of base station frequency resource.

According to an embodiment of present device, this equipment also comprises: the SINR comparison means, confirm that with terminal type device links to each other, and be used for the Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the user terminal of measuring are compared; Power control mode choice device links to each other with the SINR comparison means, is used for when the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal, according to the corresponding power control mode of the type selecting of user terminal.

According to another embodiment of present device, interference region confirms that device comprises: pilot transmission intensity acquisition module is used to obtain the emissive porwer of neighbor cell pilot signal; The path loss calculation module links to each other with pilot transmission intensity acquisition module, is used to receive the pilot signal strength of the neighbor cell of user terminal measurement, and calculates the path loss of user terminal to neighbor cell according to the emissive porwer of neighbor cell pilot signal; The interfering signal power computing module links to each other with the path loss calculation module, is used for calculating the interfering signal power from user terminal that neighbor cell receives according to user terminal to the path loss of neighbor cell and the maximum transmission power spectrum density of user terminal; Terminal interference region determination module links to each other with the interfering signal power computing module, is used for interfering signal power and preset interference threshold are compared, to confirm the interference region of user terminal.

Another embodiment according to present device; Preset interference threshold comprises strong jamming thresholding and weak jamming thresholding; Wherein, The strong jamming thresholding is higher than the weak jamming thresholding, and terminal interference region determination module comprises: interference power is the unit relatively, is used for interfering signal power and strong jamming thresholding and weak jamming thresholding are compared; Area type is confirmed the unit; Relatively link to each other the unit with interference power, be used for during greater than the strong jamming thresholding, confirming that neighbor cell is in the strong jamming district of user terminal at interfering signal power; When interfering signal power is between strong jamming thresholding and weak jamming thresholding; Confirm that neighbor cell is in the transition interference range of user terminal, during less than the weak jamming thresholding, confirm that neighbor cell is in the weak jamming district of user terminal at interfering signal power.

Embodiment again according to present device; The interference region of user terminal comprises strong jamming district, transition interference range and weak jamming district; Terminal type confirms that device comprises: the interference source judge module, and whether the strong jamming district that is used for the judges terminal exists the sub-district of being disturbed; The interference source type determination module links to each other with the interference source judge module, if be used for the sub-district that the interference source judge module judges that existence is disturbed, confirms that then user terminal is a strong interferers, otherwise, confirm that user terminal is the weak jamming source.

Embodiment again according to present device; Priority confirms that device comprises: frequency resource is divided module; Be used for the employed frequency resource R in each base station is divided, frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source; The terminal type judge module is used for the type at judges terminal; Weak jamming source resource determination module; Link to each other with the terminal type judge module; Being used at user terminal is under the situation in weak jamming source; Confirm the frequency resource Rw that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the frequency resource Rs that user terminal second preferentially uses base station, user terminal place to distribute as user terminal; Strong interferers resource determination module; Link to each other with the terminal type judge module; Being used at user terminal is under the situation of strong interferers; Confirm the frequency resource Rs that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the user terminal second preferential transition interference range of user terminal and the frequency resource Rs of base station, weak jamming district of using, user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of user terminal.

Embodiment again according to present device; Comprise the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source with the corresponding SINR thresholding of type of user terminal; Power control mode choice device comprises: strong interferers power control mode determination module; Being used at user terminal is that the SINR of the user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of strong interferers, carries out inter-cell power control; Weak jamming source power control mode determination module, being used at user terminal is that the SINR of the user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in weak jamming source, in the base station at user terminal place, carries out closed power control.

According to an embodiment again of present device, equipment also comprises the minizone power control device, and the minizone power control device comprises: power control request receiver module is used for the power control request to frequency resource block Ru that reception of neighboring cell sends; Search module, link to each other, be used to search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru with power control request receiver module; The transmitting power computing module; With search module and link to each other; Be used for comprising under the situation of sub-district of transmission power control request in the strong jamming district of the user terminal of frequency of utilization Resource Block Ru; Transmitting power on the calculated rate Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru carried out power control.

Uplink interference Mediation Device of the present invention; The neighbor cell pilot signal strength through user terminal to send up and the maximum transmission power spectrum density of user terminal are confirmed the interference region of user terminal; Then according to the disturbed condition of user terminal to neighbor cell; Confirm different frequency resources for different user terminals and use priority, with the uplink interference of minimizing minizone, thus the generation of minimizing " frequency is flooded " phenomenon.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part.In the accompanying drawings:

Fig. 1 is a typical minizone descending interference scene sketch map.

Fig. 2 is typical inter-cell uplink interference scene sketch map.

Fig. 3 is a soft-frequency reuse scheme sketch map.

Fig. 4 is the sight sketch map that Cell Center User is interfered.

Fig. 5 is the interference sketch map of neighbor cell.

Fig. 6 is the schematic flow sheet of first embodiment of uplink interference coordination approach of the present invention.

Fig. 7 is the schematic flow sheet of second embodiment of the inventive method.

Fig. 8 is the schematic flow sheet that the present invention confirms an instance of user terminal interference region.

Fig. 9 is the interference region sketch map of user terminal 0.

Figure 10 is the sketch map that the present invention confirms preset interference threshold.

Figure 11 is the sketch map that the present invention confirms resource prioritization.

Figure 12 is the schematic flow sheet of power control of the present invention.

Figure 13 is the structural representation of first embodiment of uplink interference Mediation Device of the present invention.

Figure 14 is the structural representation of second embodiment of present device.

Figure 15 is the structural representation of the 3rd embodiment of present device.

Figure 16 is the structural representation of the 5th embodiment of present device.

Figure 17 is the structural representation of the 6th embodiment of present device.

Figure 18 is the structural representation of the 7th embodiment of present device.

Figure 19 is the structural representation of the 8th embodiment of present device.

Embodiment

With reference to the accompanying drawings the present invention is more comprehensively described, exemplary embodiment of the present invention wherein is described.Exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but do not constitute improper qualification of the present invention.

In the uplink interference environment and since the user " attribute at " center " and " edge " can not reflect the disturbed condition of user to each neighbor cell, occurs easily being flooded phenomenon by the interference of interfered cell.

But, at present also ripe without comparison uplink interference coordinate scheme, existing soft-frequency reuse scheme and all can not solve the interference that exists in the uplink interference based on the coordinate scheme that disturbs indication and flood problem.Therefore the present invention proposes a kind of uplink interference coordination approach and equipment, it can confirm the interference region of user terminal, confirms the priority of the employed base station frequency resource of user terminal again according to the type of user terminal.

Fig. 6 is the schematic flow sheet of first embodiment of uplink interference coordination approach of the present invention.

As shown in Figure 6, this embodiment may further comprise the steps:

S102; The base station is according to maximum transmission power spectrum density (the Power Spectrum Density of the pilot signal strength and the user terminal of the neighbor cell of user terminal measurement; PSD) confirm the interference region of user terminal; The interference region of user terminal can comprise: for example, and strong jamming district, interference transition region and weak jamming district;

S104 confirms the type of user terminal according to the interference region of user terminal, for example, can user terminal be divided into strong interferers and weak jamming source according to the disturbance regime of user terminal;

S106 confirms that according to the type of user terminal user terminal uses the priority of base station frequency resource.

The maximum transmission power spectrum density of neighbor cell pilot signal strength and the user terminal of this embodiment through user terminal to send up is confirmed the interference region of user terminal; Then according to the disturbed condition of user terminal to neighbor cell; Confirm different frequency resources for different user terminals and use priority; With the uplink interference of minimizing minizone, thus the generation of minimizing " frequency is flooded " phenomenon.

Fig. 7 is the schematic flow sheet of second embodiment of the inventive method.

As shown in Figure 7, this embodiment can may further comprise the steps:

S202, the interference region of user terminal is confirmed in the base station according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and user terminal;

S204 confirms the type of user terminal according to the interference region of user terminal;

S206 confirms that according to the type of user terminal user terminal uses the priority of base station frequency resource;

S208 compares the Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the user terminal of measuring;

S210 is when the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal, according to the corresponding power control mode of the type selecting of user terminal.

This embodiment receives at user terminal under the situation of high interference, confirms the different power control strategy according to the difference of user terminal interference range, not causing under the strongly disturbing prerequisite, can increase the throughput of community user.

In the 3rd embodiment of the inventive method, the base station confirms that according to the pilot signal strength of the neighbor cell of user terminal measurement and the maximum transmission power spectrum density of user terminal the step of the interference region of user terminal can comprise:

The base station obtains the emissive porwer of neighbor cell pilot signal;

Receive the pilot signal strength of the neighbor cell of user terminal measurement; And calculate the path loss of user terminal to neighbor cell according to the emissive porwer of neighbor cell pilot signal; For example; The intensity that can utilize the emissive porwer of neighbor cell pilot signal to deduct the pilot signal that user terminal receives can obtain the downlink path loss of neighbor cell to user terminal, in this embodiment simultaneously, supposes that also application system is tdd systems (TDD); Promptly can think and up path loss and descending path loss approximately equal therefore can obtain the up path loss of user terminal to neighbor cell;

Calculate the interfering signal power that neighbor cell receives according to user terminal to the path loss of neighbor cell and the maximum transmission power spectrum density of user terminal from user terminal; For example; Can utilize the maximum transmission power of user terminal to deduct the path loss of user terminal, thereby can obtain the interfering signal power that neighbor cell receives from user terminal to neighbor cell;

Interfering signal power and preset interference threshold are compared, to confirm the interference region of user terminal.

Below explain through an instantiation:

It still is all reception of neighboring cell pilot signals of sending periodically of service state that user terminal is in idle condition; Measure the intensity of neighbor cell pilot transmitted signal, and send the pilot signal strength that records and the maximum transmission power spectrum density of user terminal to the base station at user terminal place.

The base station can obtain the emissive porwer of neighbor cell pilot signal through X2 interface, and the pilot signal strength of the neighbor cell through user terminal to send up can be confirmed the path loss of user terminal to neighbor cell again.

Calculate the comparison of the interfering signal power from user terminal i

that neighbor cell j receives according to user terminal to the maximum transmission power spectrum density of the path loss of neighbor cell and user terminal, neighbor cell j is divided into the different interference regions of user terminal through preset interference threshold and interfering signal power .

Fig. 8 is the schematic flow sheet that the present invention confirms an instance of user terminal interference region.

As shown in Figure 8, this instance can may further comprise the steps:

S302, user terminal institute serving base station is through the pilot signal transmission strength information of X2 interface reception of neighboring cell base station;

S304, the pilot signal of user terminal receiving neighbor bs, and measure the intensity of the pilot signal receive;

S306, user terminal is to the intensity of its serving base stations report neighbor cell pilot signal and the maximum PSD of user terminal;

S308, serving BS is set up the resource interference table through the emission power of pilot signal of neighbor cell and the information of user terminal to send up, confirms user's interference region.

In S308; The base station utilizes the information of family terminal to report, the pilot signal transmission intensity and the preset interference threshold of X2 interface transmission that user terminal is received that the sub-district of pilot signal is divided into strong jamming district (Strong Interference Area; SIA); The transition interference range (Transition InterferenceArea, TIA) with the weak jamming district (Weak Interference Area, WIA).

Fig. 9 is the interference region sketch map of user terminal 0.

As shown in Figure 9, user terminal 0 (UE0) is served sub-district 0, supposes in sub-district 0 to be that the Resource Block that UE0 distributed is 1; 2 and 3 (for example, can all resource S of sub-district 0 be divided into S1, S2 and S3, the Resource Block here refers to the sequence number of Resource Block under certain bandwidth; If bandwidth 5MHz, can think that resource S1 comprises Resource Block 1～8 corresponding to 24 Resource Block, S2 comprises Resource Block 9～16; S3 comprises Resource Block 17～24, and the Resource Block 1～3 here is selected from resource S1) because UE0 is positioned at the edge of sub-district 0 and sub-district 1; So the embodiment according to above-mentioned definite UE0 interference region can know that the resource interference table of sub-district 0 is shown in below table 1:

Table 1

The content of above-mentioned resource interference table can include but not limited to Resource Block numbering, user terminal numbering and interfered cell.

Base station among this embodiment can be confirmed the interference region of portable terminal through the relevant information of user terminal to send up, thereby for reducing the ready work of interference that user terminal caused.

In the 4th embodiment of the inventive method; Preset interference threshold comprises strong jamming thresholding and weak jamming thresholding, and wherein, the strong jamming thresholding is higher than the weak jamming thresholding; Interfering signal power and preset interference threshold are compared, comprise with the step of the interference region of confirming user terminal:

Interfering signal power is compared with strong jamming thresholding and weak jamming thresholding respectively;

At interfering signal power during greater than the strong jamming thresholding; Confirm that neighbor cell is in the strong jamming district of user terminal; When interfering signal power is between strong jamming thresholding and weak jamming thresholding; Confirm that neighbor cell is in the transition interference range of user terminal, during less than the weak jamming thresholding, confirm that neighbor cell is in the weak jamming district of user terminal at interfering signal power.

Below explain through an instantiation:

Suppose that the strong jamming thresholding is Is; The weak jamming thresholding is Iw, neighbor cell j receive from the interfering signal power of user terminal i is

During greater than Is, neighbor cell j is in the strong jamming district (referring to that user terminal i can cause strong jamming to this neighbor cell j) of user terminal i as ; During less than Is and greater than Iw, this neighbor cell j is in the transition interference range of user terminal i as

; During less than Iw, this neighbor cell j is in the weak jamming district of user terminal i as

.

Wherein, can according to the coverage of base station in the real system, minizone apart from and the factors such as quality of actual wireless transmission environment confirm thresholding Is and Iw.

Figure 10 is the sketch map that the present invention confirms preset interference threshold.

Shown in figure 10, specify a kind of definite method of preset interference threshold.

Suppose that each community user terminal adopts identical up open Loop Power control mode, apart from being in the structure of ISD (distance between sites), be judged as Cell Edge User greater than the user terminal of radius r in the minizone.User terminal #1 and #2 serve sub-district 0, and are judged as the edge customer of sub-district 0 just.Make sub-district 1 and sub-district 2 be in the SIA of user terminal #1 just, sub-district 2 is in the TIA of user terminal #2 just, then,

$I_s=I_1^2=I_1^1={\mathrm{PSD}}_1-{\mathrm{<figure-callout\; id="1"\; label="PL"\; filenames="HSA00000208494700021.png,HSA00000208494700022.png"\; state="\{\{state\}\}">PL</figure-callout>}}_1^1---\left(3\right)$

$I_w=I_2^2={\mathrm{PSD}}_2-{\mathrm{<figure-callout\; id="2"\; label="PL"\; filenames="HSA00000208494700021.png,HSA00000208494700022.png"\; state="\{\{state\}\}">PL</figure-callout>}}_2^2---\left(4\right)$

Wherein, PSD _iBe the maximum transmission power spectrum density of user terminal #i in current location, Be the path loss of user terminal i j to the sub-district.

In the 5th embodiment of the inventive method, the interference region of user terminal comprises strong jamming district, transition interference range and weak jamming district, confirms that according to the interference region of user terminal the step of the type of user terminal comprises:

Whether there is the sub-district of being disturbed in the strong jamming district at judges terminal;

If there is the sub-district of being disturbed, confirm that then user terminal is strong interferers (SIU), otherwise, confirm that user terminal is weak jamming source (WIU).

Simultaneously, the strong interferers that will have the same disturbance zone is assigned to same group, and the interior on the same group mutually employed resource prioritization of strong interferers is identical.For example, a UE is arranged respectively about UE0, they are similar to the annoyance level of adjacent base station with UE0, and so, these three UE have the priority of identical use resource, promptly all begin to distribute from certain a part of resource.

With the UE0 among Fig. 9 is example, can find out from its resource interference table, in the SIA of user terminal 0, has one by interfered cell 1, so can draw, UE0 is a strong interferers.

Suppose that UE0 is positioned at the center of sub-district 0, it can not cause strong jamming to neighbor cell, can confirm that then UE0 is the weak jamming source.

After setting up the resource interference table, the interference region that the base station can clear and definite user terminal and this user terminal are to the annoyance level of adjacent base station, so that carry out the interference coordination of user terminal and interfered base station exactly.

In the 6th embodiment of the inventive method, confirm that according to the type of user terminal user terminal uses the step of the priority of base station frequency resource to comprise:

Employed frequency resource R divides to each base station, and frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source;

The type at judges terminal;

At user terminal is under the situation in weak jamming source; Confirm the frequency resource Rw that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the frequency resource Rs that user terminal second preferentially uses base station, user terminal place to distribute as user terminal;

At user terminal is under the situation of strong interferers; Confirm the frequency resource Rs that user terminal first preferentially uses base station, user terminal place to distribute as user terminal; The user terminal second preferential transition interference range of user terminal and the frequency resource Rs of base station, weak jamming district of using, user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of user terminal.

Below explain through an instantiation:

Suppose the base station the set of the Resource Block that can distribute be R; According to the base station resource of the preferential use of SIU and WIU is divided; Can set R be divided into preferential Rs that uses of SIU and the preferential Rw that uses of WIU, Rs and Rw can further be divided into subclass Rsi (∪ Rsi=Rs) and Rwi (∪ Rwi=Rw).If the interference that the resource of the employed set in active user terminal R1 produces is littler than the interference that the resource of using set R2 produces; Then for this user terminal; The priority of set R1 will be higher than the priority (wherein, R1 and R2 are any two Resource Block among the Resource Block set R) of gathering R2.Suppose resource R is divided into R1, R2 and R3; If sub-district 0 is known the edge customer of sub-district 1 and is used the resource of S1 part; For sub-district 0, its edge customer uses the resource of S1 part to produce bigger interference than the edge customer that uses S2 and S3 resource to sub-district 1 so.

For weak jamming source WIU, its first priority resource is the resource Rw of base station, user terminal place, and its second priority is the resource Rs of base station, user terminal place.

For strong interferers SIU, its first priority is that base station, user terminal place is the resource Rs that identical SIU distributed; Second priority is the TIA of user terminal and the resource Rs of WIA base station, and the 3rd priority is the resource Rs of the SIA base station of user terminal.

With the edge customer resource multiplex factor is that 3 sub-district is the distribution of example explanation priority.The multiplexing on the edge of factor is in 3 the system, and Rs is to be 1/3 resource that Cell Edge User distributes, and Rw is that the sub-district is 2/3 resource of central user priority allocation.

Figure 11 is the sketch map that the present invention confirms resource prioritization.

Shown in figure 11, user terminal #a and #b serve sub-district 0, but are in the diverse location of sub-district 0, thereby produce different interference regions.The interference region of user terminal #a and #b is shown in below table 2:

User terminal	SIA	TIA	WIA
				#a	Sub-district 1	Sub-district 2 and 6	Sub-district 3 and 5
#b	Sub-district 4	Sub-district 3 and 5	Sub-district 2 and 6

Table 2

It according to the multiplexing factor resource division of 3 sub-district; Base station resource R is divided into Rs (shadow region among the figure) and Rw (white portion among the figure), because user terminal #a and user terminal #b are strong interferers, so; Confirm principle according to above-mentioned priority; Can confirm that first priority of user terminal #a and user terminal #b is the Rs of Cell 0, that is, and S1.According to disturbing minimum resource to have the more principle of high priority; Second priority of user terminal #a is the Rs of its transition interference range Cell 2, that is, and and S3; Because user terminal #a uses this resource communication (that is, S2) littler to the interference of its SIA than the Rs that uses Cell 1.In like manner, second priority of user terminal #b is the Rs of Cell 3 (the resource allocation rule of 3 couples of Rs of Cell and Rw is identical with Cell 1 and Cell's 5), that is, and and S2.

This embodiment divides different priority according to different user terminals, can farthest reduce and disturb the generation of flooding phenomenon, guarantees by interfered cell user's uplink communication quality.According to the division of priority, first priority of neighbor cell SIU is mutually orthogonal, to guarantee to produce the communication quality of interference user.Simultaneously, the interference that when SIU uses the resource of second priority adjacent base station is produced is less, that is, can under the prerequisite that does not increase neighbor cell interference, increase the SIU user's of this sub-district service number, thereby promote the capacity of system.

In the 7th embodiment of the inventive method; Comprise the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source with the corresponding SINR thresholding of type of user terminal; When the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal, comprise according to the step of the corresponding power control mode of type selecting of user terminal:

At user terminal is that the SINR of the user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of strong interferers, carries out inter-cell power control;

At user terminal is that the SINR of the user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in weak jamming source, in the base station at user terminal place, carries out closed power control.

Below explain through an instantiation:

The SINR of all user terminals is periodically measured in the base station, is that SIU and WIU set SINR minimum threshold Ss and Sw simultaneously.When the SINR of user terminal was lower than corresponding threshold value, the base station was carried out power control according to the type of user terminal to user terminal.

For SIU user's power control, the power control request is transmitted through X2 interface in the base station, makes the user terminal that in the adjacent base station this user terminal is produced high interference under the prerequisite that assurance himself is communicated by letter, and reduces transmitting power as far as possible.For WIU user's power control, can adopt with SINR target is the closed power control of target SINR thresholding.

Figure 12 is the schematic flow sheet of power control of the present invention.

Shown in figure 12, this flow process may further comprise the steps:

S402, the SINR of each user terminal in its sub-district of base station monitors;

S404 judges that the SINR whether SIU and WIU user are arranged is lower than corresponding interference threshold, that is, whether SIU user's SINR is lower than the minimum SINR thresholding of strong interferers Ss, and whether WIU user's SINR is lower than weak jamming source minimum SINR thresholding Sw;

S406, if WIU user's SINR is lower than weak jamming source minimum SINR thresholding Sw, then WIU user is that power control target carries out closed power control on the employed Resource Block of this user with SINR target;

S408, if SIU user's SINR is lower than the minimum SINR thresholding of strong interferers Ss, then the base station is sent in the power control request on the employed high interference Resource Block of SIU user to all neighbor cells;

S410, the base station received power control request of neighbor cell is searched the resource interference table of this base station, confirms to use in this base station the user terminal of this Resource Block and the interference region of this user terminal;

S412 if the strong jamming district of this user terminal comprises the sub-district of transmission power control request, then confirms this user terminal is carried out power control;

S414, instruct to this user terminal transmission power control wherein the base station of the neighbor cell of received power control request, comprises the size of Resource Block numbering and power control;

S416, this user terminal receive power control instruction and carry out power control.

Above-mentioned target of carrying out power control is under the prerequisite that guarantees the Adaptive Modulation and Coding grade (MCS) that the power control user is current, reduces the interference of this user terminal to this high interference Resource Block.

This embodiment can confirm the different power control strategy according to the difference of user terminal interference range when user terminal is received high interference, not causing under the strongly disturbing prerequisite, can guarantee the service quality of central user and edge customer.

In the 8th embodiment of the inventive method, the step of carrying out inter-cell power control comprises:

The power control request of the frequency resource block Ru that user terminal is used is sent in the base station at user terminal place to neighbor cell;

In neighbor cell, search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru;

If the strong jamming district of the user terminal of frequency of utilization Resource Block Ru comprises the sub-district of transmission power control request in the neighbor cell; Then calculate the transmitting power on the neighbor cell medium frequency Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru in the neighbor cell is carried out power control.

For example; For confirming the power level of minizone power control; Be without loss of generality, can suppose that the number that user terminal takies Resource Block is N, the interference strength that on the signal power that receives this user terminal on this N Resource Block and this Resource Block, receives with the base station is calculated the upstream sinr of this whole user; Promptly

${\mathrm{SINR}}_{\mathrm{UEi}}=\frac{\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}(P_{\mathrm{tn}}-\mathrm{PL})}{\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{P}_{\mathrm{rn}}+{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="HSA00000208494700022.png,HSA00000208494700052.png"\; state="\{\{state\}\}">N</figure-callout>}}_0\&CenterDot;\mathrm{BW}}---\left(5\right)$

Wherein,

SINR _UEiThe SINR of expression user terminal i;

N representes the number of the frequency resource block that user terminal i takies;

P _TnThe transmitting power of expression user terminal i on n Resource Block;

PL representes the path loss of user terminal i to Current Serving BTS;

P _RnBe the interference received power of base station on n Resource Block;

N ₀Be the white noise intensity on the unit frequency spectrum ,-174dBm/Hz;

The total bandwidth that BW takies for user terminal i.

Suppose and will carry out the frequency power control to the r Resource Block of user terminal i, the MCS of active user's terminal i is L _Rn, corresponding SINR requires to be (SINR _Min, SINR _Max).Get SINR _MinAs power control target, that is, behind the power that reduces the r Resource Block, the SINR of user terminal is SINR _Min, that is,

${\mathrm{SINR}}_{\mathrm{UEi}}=\frac{\underset{n=1}{\overset{N,n\&NotEqual;r}{\mathrm{\&Sigma;}}}(P_{\mathrm{tn}}-\mathrm{PL})+(P_{\mathrm{tr}}-\mathrm{PL})}{\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{P}_{\mathrm{rn}}+N\&CenterDot;\mathrm{BW}}=\mathrm{SIN}{R}_{\min }$

$\underset{n=1}{\overset{N,n\&NotEqual;r}{\mathrm{\&Sigma;}}}(P_{\mathrm{tn}}-\mathrm{PL})+(P_{\mathrm{tr}}-\mathrm{PL})=\mathrm{SIN}{R}_{\min }\&CenterDot;(\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{P}_{\mathrm{rn}}+N\&CenterDot;\mathrm{BW})$

$P_{\mathrm{tr}}-\mathrm{PL}={\mathrm{SINR}}_{\min }\&CenterDot;(\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{P}_{\mathrm{rn}}+N\&CenterDot;\mathrm{BW})-\underset{n=1}{\overset{N,n\&NotEqual;r}{\mathrm{\&Sigma;}}}(P_{\mathrm{tn}}-\mathrm{PL})$

$P_{\mathrm{tr}}=\mathrm{SIN}{R}_{\min }\&CenterDot;(\underset{n=1}{\overset{N}{\mathrm{\&Sigma;}}}{P}_{\mathrm{rn}}+N\&CenterDot;\mathrm{BW})-\underset{n=1}{\overset{N,n\&NotEqual;r}{\mathrm{\&Sigma;}}}(P_{\mathrm{tn}}-\mathrm{PL})+\mathrm{PL}---\left(6\right)$

Through type (6) can be confirmed the uplink transmission power of user terminal at the r Resource Block.

Simultaneously, if a plurality of Resource Block of same user terminal receive minizone power control request, then in formula (6), unknown quantity is by P _TrBecome P _Tr1, P _Tr2... Sum ∑ P _Tri, the base station can be adopted average method or confirmed the transmitting power of each Resource Block according to the quantity that each Resource Block sends the power control request neatly.At this moment can suitably adjust the MCS grade of user terminal i downwards, reduce target SINR to carry out the power control of many Resource Block.

Because different user terminals is different to the annoyance level of neighbor cell, so take the different power control strategy to SIU and WIU, can reduce the interference of minizone more effectively.For WIU user; Because it is in the center of sub-district, and is less to the interference of neighbor cell, so when such user receives stronger uplink interference; The control of employing closed power; Under the prerequisite that does not produce minizone communication, can either guarantee the service quality of WIU, can not produce stronger uplink interference again to neighbor cell.For SIU user, through the mode of minizone power control, seek in the neighbor cell strongly disturbing user is caused in this sub-district, under the prerequisite that guarantees the whole user communication quality, can reduce of the interference of neighbor cell user terminal to this sub-district SIU user.

Figure 13 is the structural representation of first embodiment of uplink interference Mediation Device of the present invention.

Shown in figure 13, the uplink interference Mediation Device of this embodiment comprises:

Interference region is confirmed device 11, is used for confirming according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and user terminal the interference region of user terminal;

Terminal type is confirmed device 12, confirms that with interference region device 11 links to each other, and is used for confirming according to the interference region of user terminal the type of user terminal, for example, can user terminal be divided into strong interferers and weak jamming source according to the disturbance regime of user terminal;

Priority is confirmed device 13, confirms that with terminal type device 12 links to each other, and is used for confirming that according to the type of user terminal user terminal uses the priority of base station frequency resource.

The maximum transmission power spectrum density of neighbor cell pilot signal strength and the user terminal of this embodiment through user terminal to send up is confirmed the interference region of user terminal; Then according to the disturbed condition of user terminal to neighbor cell; Confirm different frequency resources for different user terminals and use priority; With the uplink interference of minimizing minizone, thus the generation of minimizing " frequency is flooded " phenomenon.

Figure 14 is the structural representation of second embodiment of present device.

Shown in figure 14, to compare with embodiment among Figure 13, the equipment of this embodiment also comprises:

SINR comparison means 21 confirms that with terminal type device 12 links to each other, and is used for the Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the user terminal of measuring are compared;

Power control mode choice device 22 links to each other with SINR comparison means 21, is used for when the SINR of user terminal is lower than with the corresponding SINR thresholding of type of user terminal, according to the corresponding power control mode of the type selecting of user terminal.

This embodiment receives at user terminal under the situation of high interference, confirms the different power control strategy according to the difference of user terminal interference range, not causing under the strongly disturbing prerequisite, can increase the throughput of community user.

Figure 15 is the structural representation of the 3rd embodiment of present device.

Shown in figure 15, to compare with embodiment in 13, the interference region in the equipment of this embodiment confirms that device 31 comprises:

Pilot transmission intensity acquisition module 311 is used to obtain the emissive porwer of neighbor cell pilot signal;

Path loss calculation module 312; Link to each other with pilot transmission intensity acquisition module 311; Be used to receive the pilot signal strength of the neighbor cell of user terminal measurement; And calculate the path loss of user terminal to neighbor cell according to the emissive porwer of neighbor cell pilot signal, for example, the intensity that can utilize the emissive porwer of neighbor cell pilot signal to deduct the pilot signal that user terminal receives can obtain the downlink path loss of neighbor cell to user terminal; In this embodiment simultaneously; Suppose that also application system is tdd systems (TDD), promptly can think up path loss and descending path loss approximately equal therefore can obtain the up path loss of user terminal to neighbor cell;

Interfering signal power computing module 313; Link to each other with path loss calculation module 312; Be used for calculating the interfering signal power that neighbor cell receives to the path loss of neighbor cell and the maximum transmission power spectrum density of user terminal from user terminal according to user terminal; For example, can utilize the maximum transmission power of user terminal to deduct the path loss of user terminal, thereby can obtain the interfering signal power that neighbor cell receives from user terminal to neighbor cell;

Terminal interference region determination module 314 links to each other with interfering signal power computing module 313, is used for interfering signal power and preset interference threshold are compared, to confirm the interference region of user terminal.

The instantiation of the instantiation of this embodiment in can the 3rd embodiment of reference method.

Base station among this embodiment can be confirmed the interference region of portable terminal through the relevant information of user terminal to send up, thereby for reducing the ready work of interference that user terminal caused.

In the 4th embodiment of present device; Compare with the embodiment among Figure 15, the preset interference threshold among this embodiment comprises strong jamming thresholding and weak jamming thresholding, wherein; The strong jamming thresholding is higher than the weak jamming thresholding, and the terminal interference region determination module in the uplink interference Mediation Device comprises:

Interference power is the unit relatively, is used for interfering signal power and strong jamming thresholding and weak jamming thresholding are compared;

Area type is confirmed the unit; Relatively link to each other the unit with interference power, be used for during greater than the strong jamming thresholding, confirming that neighbor cell is in the strong jamming district of user terminal at interfering signal power; When interfering signal power is between strong jamming thresholding and weak jamming thresholding; Confirm that neighbor cell is in the transition interference range of user terminal, during less than the weak jamming thresholding, confirm that neighbor cell is in the weak jamming district of user terminal at interfering signal power.

Suppose that the strong jamming thresholding is Is; The weak jamming thresholding is Iw, neighbor cell j receive from the interfering signal power of user terminal i is

During greater than Is, neighbor cell j is in the strong jamming district (referring to that user terminal i can cause strong jamming to this neighbor cell j) of user terminal i as

; During less than Is and greater than Iw, this neighbor cell j is in the transition interference range of user terminal i as

; During less than Iw, this neighbor cell j is in the weak jamming district of user terminal i as

.

Figure 16 is the structural representation of the 5th embodiment of present device.

Shown in figure 16, compare with embodiment among Figure 13, in this embodiment, the interference region of user terminal comprises strong jamming district, transition interference range and weak jamming district, the terminal type in the equipment of this embodiment confirms that device 41 comprises:

Interference source judge module 411, whether the strong jamming district that is used for the judges terminal exists the sub-district of being disturbed;

Interference source type determination module 412 links to each other with interference source judge module 411, if be used for the sub-district that the interference source judge module judges that existence is disturbed, confirms that then user terminal is a strong interferers, otherwise, confirm that user terminal is the weak jamming source.

Simultaneously, the strong interferers that will have the same disturbance zone is assigned to same group, and the interior on the same group mutually employed resource prioritization of strong interferers is identical.For example, a UE is arranged respectively about UE0, they are similar to the annoyance level of adjacent base station with UE0, and so, these three UE have the priority of identical use resource, promptly all begin to distribute from certain a part of resource.

The instantiation of the instantiation of this embodiment in can the 5th embodiment of reference method.

This embodiment can clear and definite user terminal interference region and this user terminal to the annoyance level of adjacent base station, so that carry out the interference coordination of user terminal and interfered base station exactly.

Figure 17 is the structural representation of the 6th embodiment of present device.

Shown in figure 17, to compare with embodiment among Figure 16, the priority in the equipment of this embodiment confirms that device 51 comprises:

Frequency resource is divided module 511, is used for the employed frequency resource R in each base station is divided, and frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source;

Terminal type judge module 512 is used for the type at judges terminal;

Weak jamming source resource determination module 513; Link to each other with terminal type judge module 512; Being used at user terminal is under the situation in weak jamming source; Confirm the frequency resource Rw that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the frequency resource Rs that user terminal second preferentially uses base station, user terminal place to distribute as user terminal;

Strong interferers resource determination module 514; Link to each other with terminal type judge module 512; Being used at user terminal is under the situation of strong interferers; Confirm the frequency resource Rs that user terminal first preferentially uses base station, user terminal place to distribute as user terminal, the user terminal second preferential transition interference range of user terminal and the frequency resource Rs of base station, weak jamming district of using, user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of user terminal.

The instantiation of the instantiation of this embodiment in can the 6th embodiment of reference method.

This embodiment divides different priority according to different user terminals, can farthest reduce and disturb the generation of flooding phenomenon, guarantees by interfered cell user's uplink communication quality.According to the division of priority, first priority of neighbor cell SIU is mutually orthogonal, to guarantee to produce the communication quality of interference user.Simultaneously, the interference that when SIU uses the resource of second priority adjacent base station is produced is less, that is, can under the prerequisite that does not increase neighbor cell interference, increase the SIU user's of this sub-district service number, thereby promote the capacity of system.

Figure 18 is the structural representation of the 7th embodiment of present device.

Shown in figure 18; Compare with the embodiment among Figure 14; In this embodiment, comprise the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source with the corresponding SINR thresholding of type of user terminal, the power control mode choice device 61 in the equipment of this embodiment comprises:

Strong interferers power control mode determination module 611, being used at user terminal is that the SINR of the user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of strong interferers, carries out inter-cell power control;

Weak jamming source power control mode determination module 612, being used at user terminal is that the SINR of the user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in weak jamming source, in the base station at user terminal place, carries out closed power control.

The instantiation of the instantiation of this embodiment in can the 7th embodiment of reference method.

This embodiment can confirm the different power control strategy according to the difference of user terminal interference range when user terminal is received high interference, not causing under the strongly disturbing prerequisite, can guarantee the service quality of central user and edge customer.

Figure 19 is the structural representation of the 8th embodiment of present device.

Shown in figure 19, to compare with embodiment among Figure 18, the uplink interference Mediation Device of this embodiment also comprises the minizone power control device 71 that links to each other with power control mode choice device, minizone power control device 71 comprises:

Power control request receiver module 711 is used for the power control request to frequency resource block Ru that reception of neighboring cell sends;

Search module 712, link to each other, be used to search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru with power control request receiver module 711;

Transmitting power computing module 713; With search module 712 and link to each other; Be used for comprising under the situation of sub-district of transmission power control request in the strong jamming district of the user terminal of frequency of utilization Resource Block Ru; Transmitting power on the calculated rate Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru carried out power control.

The instantiation of the instantiation of this embodiment in can the 8th embodiment of reference method.

Because different user terminals is different to the annoyance level of neighbor cell, so take the different power control strategy to SIU and WIU, can reduce the interference of minizone more effectively.For WIU user; Because it is in the center of sub-district, and is less to the interference of neighbor cell, so when such user receives stronger uplink interference; The control of employing closed power; Under the prerequisite that does not produce minizone communication, can either guarantee the service quality of WIU, can not produce stronger uplink interference again to neighbor cell.For SIU user; Through the mode of minizone power control, seek in the neighbor cell strongly disturbing user is caused in this sub-district, under the prerequisite that guarantees the whole user communication quality; Can reduce the interference of neighbor cell user terminal (that is strong interferers) to this sub-district SIU user.

Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are conspicuous for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.

Claims (16)

1. a uplink interference coordination approach is characterized in that, said method comprises:

The interference region of said user terminal is confirmed in the base station according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and said user terminal;

Confirm the type of said user terminal according to the interference region of said user terminal;

Confirm that according to the type of said user terminal said user terminal uses the priority of base station frequency resource.

2. method according to claim 1 is characterized in that, said method also comprises:

The Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the said user terminal of measuring are compared;

When the SINR of said user terminal is lower than the corresponding SINR thresholding of said and type of user terminal, according to the corresponding power control mode of the type selecting of said user terminal.

3. method according to claim 1 is characterized in that, said base station confirms that according to the pilot signal strength of the neighbor cell of user terminal measurement and the maximum transmission power spectrum density of said user terminal the step of the interference region of said user terminal comprises:

Said base station obtains the emissive porwer of neighbor cell pilot signal;

Receive the pilot signal strength of the neighbor cell of said user terminal measurement, and calculate the path loss of said user terminal to said neighbor cell according to the emissive porwer of said neighbor cell pilot signal;

Calculate the interfering signal power that said neighbor cell receives according to said user terminal to the path loss of said neighbor cell and the maximum transmission power spectrum density of said user terminal from said user terminal;

Said interfering signal power and preset interference threshold are compared, to confirm the interference region of said user terminal.

4. method according to claim 3; It is characterized in that; Said preset interference threshold comprises strong jamming thresholding and weak jamming thresholding, and wherein, said strong jamming thresholding is higher than said weak jamming thresholding; Said interfering signal power and preset interference threshold are compared, comprise with the step of the interference region of confirming said user terminal:

Said interfering signal power and said strong jamming thresholding and weak jamming thresholding are compared;

At said interfering signal power during greater than said strong jamming thresholding; Confirm that said neighbor cell is in the strong jamming district of said user terminal; When said interfering signal power is between said strong jamming thresholding and said weak jamming thresholding; Confirm that said neighbor cell is in the transition interference range of said user terminal, during less than said weak jamming thresholding, confirm that said neighbor cell is in the weak jamming district of said user terminal at said interfering signal power.

5. method according to claim 1 is characterized in that, the interference region of said user terminal comprises strong jamming district, transition interference range and weak jamming district, and said interference region according to user terminal confirms that the step of the type of said user terminal comprises:

Judge in the strong jamming district of said user terminal and whether have the sub-district of being disturbed;

If there is the sub-district of being disturbed, confirm that then said user terminal is a strong interferers, otherwise, confirm that said user terminal is the weak jamming source.

6. method according to claim 5 is characterized in that, said type according to user terminal confirms that said user terminal uses the step of the priority of base station frequency resource to comprise:

Employed frequency resource R divides to each base station, and said frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source;

Judge the type of said user terminal;

At said user terminal is under the situation in weak jamming source; Confirm that the said user terminal first preferential base station, said user terminal place of using is the frequency resource Rw of said user terminal distribution, it is the frequency resource Rs that said user terminal distributes that said user terminal second preferentially uses base station, said user terminal place;

At said user terminal is under the situation of strong interferers; Confirm that the said user terminal first preferential base station, said user terminal place of using is the frequency resource Rs of said user terminal distribution; The said user terminal second preferential transition interference range of said user terminal and the frequency resource Rs of base station, weak jamming district of using, said user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of said user terminal.

7. method according to claim 2; It is characterized in that; Said and the corresponding SINR thresholding of type of user terminal comprises the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source; When said SINR at user terminal is lower than the corresponding SINR thresholding of said and type of user terminal, comprise according to the step of the corresponding power control mode of type selecting of said user terminal:

At said user terminal is that the SINR of the said user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of said strong interferers, carries out inter-cell power control;

At said user terminal is that the SINR of the said user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in said weak jamming source, in the base station at said user terminal place, carries out closed power control.

8. method according to claim 7 is characterized in that, said step of carrying out inter-cell power control comprises:

The frequency resource block Ru that said user terminal is used is sent in power control request from the base station at said user terminal place to neighbor cell;

In said neighbor cell, search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru;

If the strong jamming district of the user terminal of frequency of utilization Resource Block Ru comprises the sub-district of transmission power control request in the neighbor cell; Then calculate the transmitting power on the said neighbor cell medium frequency Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru in the said neighbor cell is carried out power control.

9. a uplink interference Mediation Device is characterized in that, said equipment comprises:

Interference region is confirmed device, is used for confirming according to the maximum transmission power spectrum density of the pilot signal strength of the neighbor cell of user terminal measurement and said user terminal the interference region of said user terminal;

Terminal type is confirmed device, confirms that with said interference region device links to each other, and is used for confirming according to the interference region of said user terminal the type of said user terminal;

Priority is confirmed device, confirms that with said terminal type device links to each other, and is used for confirming that according to the type of said user terminal said user terminal uses the priority of base station frequency resource.

10. equipment according to claim 9 is characterized in that, said equipment also comprises:

The SINR comparison means confirms that with said terminal type device links to each other, and is used for the Signal to Interference plus Noise Ratio SINR and the corresponding SINR thresholding of type of user terminal of the said user terminal of measuring are compared;

Power control mode choice device links to each other with said SINR comparison means, is used for when the SINR of said user terminal is lower than the corresponding SINR thresholding of said and type of user terminal, according to the corresponding power control mode of the type selecting of said user terminal.

11. equipment according to claim 9 is characterized in that, said interference region confirms that device comprises:

Pilot transmission intensity acquisition module is used to obtain the emissive porwer of neighbor cell pilot signal;

The path loss calculation module; Link to each other with said pilot transmission intensity acquisition module; Be used to receive the pilot signal strength of the neighbor cell of said user terminal measurement, and calculate the path loss of said user terminal to said neighbor cell according to the emissive porwer of said neighbor cell pilot signal;

The interfering signal power computing module; Link to each other with said path loss calculation module, be used for calculating the interfering signal power that said neighbor cell receives to the path loss of said neighbor cell and the maximum transmission power spectrum density of said user terminal from said user terminal according to said user terminal;

Terminal interference region determination module links to each other with said interfering signal power computing module, is used for said interfering signal power and preset interference threshold are compared, to confirm the interference region of said user terminal.

12. equipment according to claim 11 is characterized in that, said preset interference threshold comprises strong jamming thresholding and weak jamming thresholding, and wherein, said strong jamming thresholding is higher than said weak jamming thresholding, and said terminal interference region determination module comprises:

Interference power is the unit relatively, is used for said interfering signal power and said strong jamming thresholding and weak jamming thresholding are compared;

Area type is confirmed the unit; Relatively link to each other the unit with said interference power; Be used at said interfering signal power during greater than said strong jamming thresholding; Confirm that said neighbor cell is in the strong jamming district of said user terminal, when said interfering signal power is between said strong jamming thresholding and said weak jamming thresholding, confirm that said neighbor cell is in the transition interference range of said user terminal; During less than said weak jamming thresholding, confirm that said neighbor cell is in the weak jamming district of said user terminal at said interfering signal power.

13. equipment according to claim 9 is characterized in that, the interference region of said user terminal comprises strong jamming district, transition interference range and weak jamming district, and said terminal type confirms that device comprises:

The interference source judge module is used for judging whether the strong jamming district of said user terminal exists the sub-district of being disturbed;

The interference source type determination module links to each other with said interference source judge module, if be used for the sub-district that said interference source judge module judges that existence is disturbed, confirms that then said user terminal is a strong interferers, otherwise, confirm that said user terminal is the weak jamming source.

14. equipment according to claim 13 is characterized in that, said priority confirms that device comprises:

Frequency resource is divided module, is used for the employed frequency resource R in each base station is divided, and said frequency resource R is divided into preferential frequency resource Rs that uses of strong interferers and the preferential frequency resource Rw that uses in weak jamming source;

The terminal type judge module is used to judge the type of said user terminal;

Weak jamming source resource determination module; Link to each other with said terminal type judge module; Being used at said user terminal is under the situation in weak jamming source; Confirm that the said user terminal first preferential base station, said user terminal place of using is the frequency resource Rw of said user terminal distribution, it is the frequency resource Rs that said user terminal distributes that said user terminal second preferentially uses base station, said user terminal place;

Strong interferers resource determination module; Link to each other with said terminal type judge module; Being used at said user terminal is under the situation of strong interferers; Confirm that the said user terminal first preferential base station, said user terminal place of using is the frequency resource Rs of said user terminal distribution; The said user terminal second preferential transition interference range of said user terminal and the frequency resource Rs of base station, weak jamming district of using, said user terminal the 3rd preferential frequency resource Rs that uses the base station, strong jamming district of said user terminal.

15. equipment according to claim 10 is characterized in that, the said and corresponding SINR thresholding of type of user terminal comprises the minimum SINR thresholding of minimum SINR thresholding of strong interferers and weak jamming source, and said power control mode choice device comprises:

Strong interferers power control mode determination module, being used at said user terminal is that the SINR of the said user terminal of strong interferers and measurement is lower than under the situation of the minimum SINR thresholding of said strong interferers, carries out inter-cell power control;

Weak jamming source power control mode determination module; Being used at said user terminal is that the SINR of the said user terminal of weak jamming source and measurement is lower than under the situation of the minimum SINR thresholding in said weak jamming source, in the base station at said user terminal place, carries out closed power control.

16. equipment according to claim 15 is characterized in that, said equipment also comprises the minizone power control device, and said minizone power control device comprises:

Power control request receiver module is used for the power control request to frequency resource block Ru that reception of neighboring cell sends;

Search module, link to each other, be used to search the interference region of user terminal of user terminal and the frequency of utilization Resource Block Ru of frequency of utilization Resource Block Ru with said power control request receiver module;

The transmitting power computing module; Link to each other with the said module of searching; Be used for comprising under the situation of sub-district of transmission power control request in the strong jamming district of the user terminal of frequency of utilization Resource Block Ru; Transmitting power on the calculated rate Resource Block Ru, and the user terminal of frequency of utilization Resource Block Ru carried out power control.

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